ASSEMBLY TYPE BRIDGE LOWER STRUCTURE HAVING SOCKET TYPE ELASTIC DUCT COUPLER AND METHOD OF CONSTRUCTING THE SAME

Abstract

The present disclosure provides an assembly type bridge lower structure having a socket type elastic duct coupler and a method of constructing the same in which, in construction of an assembly type bridge lower structure that consists of an assembly type foundation part, an assembly type pillar part, and an assembly type coping part, a socket type elastic duct coupler is utilized, thus enabling shear key joining at connection portions of the assembly type foundation part, the assembly type pillar part, and the assembly type coping part, easily accommodating of construction error displacements of the socket type elastic duct coupler, improving watertightness at connection portions of the precast segments, easily accommodating an insertion angle of the insertion member including a steel strand, a steel bar, a reinforcing bar, a FRP, or the like, and preventing an overflow phenomenon that occurs when epoxy is excessively applied during bonding between the precast segments.

Claims

1. An assembly type bridge lower structure having a socket type elastic duct coupler, which is an assembly type bridge lower structure constructed by assembling precast segments, the assembly type bridge lower structure comprising: an assembly type foundation part formed by assembling foundation part precast segments in a horizontal direction and a vertical direction; an assembly type pillar part assembled and constructed on an upper portion of the assembly type foundation part and formed by assembling pillar part precast segments in the vertical direction; an assembly type coping part assembled and constructed on an upper portion of the assembly type pillar part and formed by assembling coping part precast segments in the horizontal direction; a sheath pipe inserted into each of the foundation part precast segments, the pillar part precast segments, and the coping part precast segments; and a socket type elastic duct coupler that is a duct coupler formed as a socket type and made of an elastic material and is inserted into each of the foundation part precast segments, the pillar part precast segments, and the coping part precast segments to be vertically and horizontally coupled to each of the sheath pipes, wherein a duct-type sheath pipe is embedded in each of the foundation part precast segments, the pillar part precast segments, and the coping part precast segments, and the socket type elastic duct coupler connects each of the sheath pipes.

2. The assembly type bridge lower structure of claim 1, wherein the socket type elastic duct coupler, which is a duct coupler made of an elastic material such as rubber, is formed of a lower socket type elastic duct coupler on which an elastic duct coupler convex portion is formed and an upper socket type elastic duct coupler in which an elastic duct coupler concave portion is formed, which are connected to each other in a form of shear keys.

3. The assembly type bridge lower structure of claim 2, wherein an insertion member including a steel strand, a steel bar, a reinforcing bar, or a fiber-reinforced polymer is inserted at a predetermined insertion angle into the sheath pipes connected to each other by the socket type elastic duct coupler.

4. The assembly type bridge lower structure of claim 1, wherein the foundation part precast segments, the pillar part precast segments, and the coping part precast segments each have a convex portion formed on one side and a concave portion formed in the other side and are connected in a form of shear keys.

5. The assembly type bridge lower structure of claim 1, wherein the foundation part precast segments include a foundation part central precast segment and foundation part adjacent precast segments assembled to both sides of the foundation part central precast segment, and the foundation part central precast segment and the foundation part adjacent precast segments each have a convex portion formed on one side and a concave portion formed in the other side and are connected in a form of shear keys.

6. The assembly type bridge lower structure of claim 1, wherein the pillar part precast segments include a pillar part lower precast segment and a pillar part upper precast segment assembled onto the pillar part lower precast segment, and the pillar part lower precast segment and the pillar part upper precast segment each have a convex portion formed on one side and a concave portion formed in the other side and are connected in a form of shear keys.

7. The assembly type bridge lower structure of claim 1, wherein the coping part precast segments include a coping part central precast segment and coping part adjacent precast segments assembled to both sides of the coping part central precast segment, and the coping part central precast segment and the coping part adjacent precast segments each have a convex portion formed on one side and a concave portion formed in the other side and are connected in a form of shear keys.

8. A method of constructing an assembly type bridge lower structure having a socket type elastic duct coupler, which is a method of constructing an assembly type bridge lower structure constructed by assembling precast segments, the method comprising: a) for construction of an assembly type foundation part of the assembly type bridge lower structure, forming foundation part precast segments embedded with a socket type elastic duct coupler; b) assembling and connecting each of the foundation part precast segments embedded with the socket type elastic duct coupler in a horizontal direction and a vertical direction to complete the assembly type foundation part; c) for construction of an assembly type pillar part of the assembly type bridge lower structure, forming pillar part precast segments embedded with the socket type elastic duct coupler; d) on an upper portion of the assembly type foundation part, assembling and connecting each of the pillar part precast segments embedded with the socket type elastic duct coupler in the vertical direction to complete the assembly type pillar part; e) for construction of an assembly type coping part of the assembly type bridge lower structure, forming coping part precast segments embedded with the socket type elastic duct coupler; and f) on an upper portion of the assembly type pillar part, assembling and connecting each of the coping part precast segments embedded with the socket type elastic duct coupler in the horizontal direction to complete the assembly type coping part, wherein a duct-type sheath pipe is embedded in each of the foundation part precast segments, the pillar part precast segments, and the coping part precast segments, and the socket type elastic duct coupler connects each of the sheath pipes.

9. The method of claim 8, wherein the socket type elastic duct coupler, which is a duct coupler made of an elastic material such as rubber, is formed of a lower socket type elastic duct coupler on which an elastic duct coupler convex portion is formed and an upper socket type elastic duct coupler in which an elastic duct coupler concave portion is formed, which are connected to each other in a form of shear keys.

10. The method of claim 9, wherein an insertion member including a steel strand, a steel bar, a reinforcing bar, or a fiber-reinforced polymer is inserted at a predetermined insertion angle into the sheath pipes connected to each other by the socket type elastic duct coupler.

11. The method of claim 10, wherein the foundation part precast segments, the pillar part precast segments, and the coping part precast segments each have a convex portion formed on one side and a concave portion formed in the other side and are connected in a form of shear keys.

12. The method of claim 10, wherein the foundation part precast segments include a foundation part central precast segment and foundation part adjacent precast segments assembled to both sides of the foundation part central precast segment, and the foundation part central precast segment and the foundation part adjacent precast segments each have a convex portion formed on one side and a concave portion formed in the other side and are connected in a form of shear keys.

13. The method of claim 10, wherein the pillar part precast segments include a pillar part lower precast segment and a pillar part upper precast segment assembled onto the pillar part lower precast segment, and the pillar part lower precast segment and the pillar part upper precast segment each have a convex portion formed on one side and a concave portion formed in the other side and are connected in a form of shear keys.

14. The method of claim 10, wherein the coping part precast segments include a coping part central precast segment and coping part adjacent precast segments assembled to both sides of the coping part central precast segment, and the coping part central precast segment and the coping part adjacent precast segments each have a convex portion formed on one side and a concave portion formed in the other side and are connected in a form of shear keys.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0073] The above and other objects, features and advantages of the present disclosure will become more apparent to those of ordinary skill in the art by describing exemplary embodiments thereof in detail with reference to the accompanying drawings, in which:

[0074] FIG. 1 is a view illustrating the assembly of precast concrete segments having an assembly structure using a steel duct according to the related art;

[0075] FIG. 2 is a cross-sectional view illustrating a configuration of a precast coping part according to a method of constructing a precast coping part to which multi-stage tension is applied according to the related art;

[0076] FIG. 3 is a view for describing a method of constructing a precast foundation part for a bridge according to the related art;

[0077] FIG. 4 is a view for describing a match casting technique for construction of an assembly type precast pier according to the related art;

[0078] FIG. 5A is a cross-sectional view illustrating a configuration of a pier foundation in a prestressed concrete (PSC) pier assembled using precast concrete segments including a steel duct and a steel pipe according to the related art, and FIG. 5B is a perspective view illustrating a configuration of a segment in the PSC pier assembled using the precast concrete segments including the steel duct and the steel pipe;

[0079] FIG. 6 is a view illustrating a case in which a steel duct is used as a duct coupler for connecting precast segments according to the related art;

[0080] FIG. 7 is a perspective view schematically illustrating an assembly type bridge lower structure having a socket type elastic duct coupler according to an embodiment of the present disclosure;

[0081] FIG. 8 is a view illustrating an assembly type foundation part assembled in a horizontal direction and a vertical direction in the assembly type bridge lower structure having the socket type elastic duct coupler according to an embodiment of the present disclosure;

[0082] FIG. 9 is a view illustrating an assembly type pillar part assembled in the vertical direction in the assembly type bridge lower structure having the socket type elastic duct coupler according to an embodiment of the present disclosure;

[0083] FIG. 10 is a view illustrating an assembly type coping part assembled in the horizontal direction in the assembly type bridge lower structure having the socket type elastic duct coupler according to an embodiment of the present disclosure;

[0084] FIG. 11 is a view illustrating a precast segment in which the socket type elastic duct coupler and a shear key are formed in the assembly type bridge lower structure having the socket type elastic duct coupler according to an embodiment of the present disclosure;

[0085] FIG. 12 is a view illustrating in detail a structure of the socket type elastic duct coupler in the assembly type bridge lower structure having the socket type elastic duct coupler according to an embodiment of the present disclosure; and

[0086] FIG. 13 is an operational flowchart illustrating a method of constructing the assembly type bridge lower structure having the socket type elastic duct coupler according to an embodiment of the present disclosure.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

[0087] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings to allow those of ordinary skill in the art to which the present disclosure pertains to easily carry out the embodiments of the present disclosure. The present disclosure may be implemented in various different forms and is not limited to the embodiments described herein. In the drawings, parts unrelated to the description are omitted for clarity of the present disclosure, and like elements are denoted by like reference numerals throughout.

[0088] Throughout the specification, when a certain part is described as “including” a certain element, this signifies that the certain part may further include another element rather than excluding the other element unless particularly described otherwise.

[0089] [Assembly Type Bridge Lower Structure 100 Having Socket Type Elastic Duct Coupler]

[0090] FIG. 7 is a perspective view schematically illustrating an assembly type bridge lower structure having a socket type elastic duct coupler according to an embodiment of the present disclosure, FIG. 8 is a view illustrating an assembly type foundation part assembled in a horizontal direction and a vertical direction in the assembly type bridge lower structure having the socket type elastic duct coupler according to an embodiment of the present disclosure, FIG. 9 is a view illustrating an assembly type pillar part assembled in the vertical direction in the assembly type bridge lower structure having the socket type elastic duct coupler according to an embodiment of the present disclosure, and FIG. 10 is a view illustrating an assembly type coping part assembled in the horizontal direction in the assembly type bridge lower structure having the socket type elastic duct coupler according to an embodiment of the present disclosure.

[0091] Referring to FIGS. 7 to 12, an assembly type bridge lower structure 100 having a socket type elastic duct coupler according to an embodiment of the present disclosure is an assembly type bridge lower structure constructed by assembling precast segments and includes an assembly type foundation part 110, an assembly type pillar part 120, an assembly type coping part 130, a sheath pipe 140, and a socket type elastic duct coupler 150.

[0092] The assembly type foundation part 110 is formed by assembling foundation part precast segments 110a, 110b, 110c, 110d, and 110e in a horizontal direction and a vertical direction.

[0093] Here, as illustrated in FIG. 8, the foundation part precast segments 110a, 110b, 110c, 110d, and 110e may include a foundation part central precast segment 110a and foundation part adjacent precast segments 110b, 110c, 110d, and 110e assembled to four sides of the foundation part central precast segment 110a, and the foundation part central precast segment 110a and the foundation part adjacent precast segments 110b, 110c, 110d, and 110e may each have a convex portion formed on one side and a concave portion formed in the other side and may be connected in the form of shear keys.

[0094] The assembly type pillar part 120 is formed by assembling pillar part precast segments 120a and 120b in the vertical direction and is assembled and constructed on an upper portion of the assembly type foundation part 110.

[0095] Here, as illustrated in FIG. 9, the pillar part precast segments 120a and 120b may include a pillar part lower precast segment 120a and a pillar part upper precast segment 120b assembled onto the pillar part lower precast segment 120a, and the pillar part lower precast segment 120a and the pillar part upper precast segment 120b may each have a convex portion formed on one side and a concave portion formed in the other side and may be connected in the form of shear keys.

[0096] The assembly type coping part 130 is formed by assembling coping part precast segments 130a, 130b, and 130c in the horizontal direction and is assembled and constructed on an upper portion of the assembly type pillar part 120. Here, as illustrated in FIG. 10, the coping part precast segments 130a, 130b, and 130c may include a coping part central precast segment 130a and coping part adjacent precast segments 130b and 130c assembled to both sides of the coping part central precast segment 130a, and the coping part central precast segment 130a and the coping part adjacent precast segments 130b and 130c may each have a convex portion formed on one side and a concave portion formed in the other side and may be connected in the form of shear keys.

[0097] Referring to FIGS. 7 and 9, the sheath pipe 140 is inserted into each of the foundation part precast segments 110a, 110b, 110c, 110d, and 110e, the pillar part precast segments 120a and 120b, and the coping part precast segments 130a, 130b, and 130c.

[0098] The socket type elastic duct coupler 150 is a duct coupler formed as a socket type and made of an elastic material and is inserted into each of the foundation part precast segments 110a, 110b, 110c, 110d, and 110e, the pillar part precast segments 120a and 120b, and the coping part precast segments 130a, 130b, and 130c to be vertically and horizontally coupled to each of the sheath pipes 140.

[0099] In the case of the assembly type bridge lower structure 100 having the socket type elastic duct coupler according to an embodiment of the present disclosure, the foundation part precast segments 110a, 110b, 110c, 110d, and 110e, the pillar part precast segments 120a and 120b, and the coping part precast segments 130a, 130b, and 130c each have a convex portion formed on one side and a concave portion formed in the other side and are connected in the form of shear keys. Also, the duct-type sheath pipe 140 is embedded in each of the foundation part precast segments 110a, 110b, 110c, 110d, and 110e, the pillar part precast segments 120a and 120b, and the coping part precast segments 130a, 130b, and 130c, and the socket type elastic duct coupler 150 may connect each of the sheath pipes 140.

[0100] Referring to FIG. 12, an insertion member 160 includes a steel strand, a steel bar, a reinforcing bar, a fiber-reinforced polymer (FRP), or the like, and various other unmentioned new materials may also be used therefor.

[0101] According to the assembly type bridge lower structure 100 having the socket type elastic duct coupler according to an embodiment of the present disclosure, an existing steel duct coupler used to insert the insertion member 160 including a steel strand, a steel bar, a reinforcing bar, a FRP, or the like is formed as the socket type elastic duct coupler 150, such as rubber having deformability. In this way, construction errors of the duct coupler may be easily accommodated, watertightness at connection portions may be improved at joining portions of each of the precast segments for forming the bridge lower structure, and an insertion angle may be easily accommodated during insertion of the insertion member including a steel strand, a steel bar, a reinforcing bar, a FRP, or the like.

[0102] Meanwhile, FIG. 11 is a view illustrating a precast segment in which the socket type elastic duct coupler and a shear key are formed in the assembly type bridge lower structure having the socket type elastic duct coupler according to an embodiment of the present disclosure. As illustrated in FIG. 11, specifically, in the precast segments of the assembly type pillar part 120 of the assembly type bridge lower structure 100, in order to maintain stability during construction, a convex portion is formed on the upper precast segment, and a shear key of a concave portion is formed in the lower precast segment so that shear key joining is performed.

[0103] Likewise, in the precast segments of the assembly type coping part, in order to maintain stability during construction, a convex portion is formed on the central precast segment, and a shear key of a concave portion is formed in the left and right adjacent precast segments so that shear key joining is performed.

[0104] Here, in the case of the assembly type pillar part 120, a lower socket type elastic duct coupler 150a on which a convex portion is formed is embedded in the pillar part lower precast segment 120a, and an upper socket type elastic duct coupler 150b in which a concave portion is formed is embedded in the pillar part upper precast segment 120b, and in this way, shear key joining in which the convex portion and the concave portion are coupled to each other in the vertical direction is possible.

[0105] Likewise, in the case of the assembly type foundation part 110, a central socket type elastic duct coupler having a convex portion formed in the vertical direction and a concave portion formed in the horizontal direction is embedded in the central portion, an adjacent socket type elastic duct coupler having a concave portion formed in the vertical direction is embedded in the upper precast segment, and an adjacent socket type elastic duct coupler having a convex portion formed in the horizontal direction is embedded in the adjacent portions of the foundation part, and in this way, shear key joining is possible with the precast segments of the assembly type pillar part 120 in the vertical direction, and shear key joining in which the convex portion and the concave portion of the adjacent portions of the assembly type foundation part 110 are coupled to each other in the horizontal direction and the vertical direction is possible.

[0106] Likewise, in the case of the assembly type coping part 130, a central socket type elastic duct coupler having a concave portion formed therein is embedded in the coping part central precast segment 130a, and an adjacent socket type elastic duct coupler having a convex portion formed thereon is embedded in the left and right coping part adjacent precast segments 130b and 130c, and in this way, shear key joining in which the convex portion and the concave portion are coupled to each other in the horizontal direction is possible.

[0107] Specifically, in the case of the assembly type pillar part 120, the lower socket type elastic duct coupler 150a on which a convex portion is formed is embedded in the pillar part lower precast segment 120a, and the upper socket type elastic duct coupler 150b in which a concave portion is formed is embedded in the pillar part upper precast segment 120b, and in this way, shear key joining is possible between the pillar part lower precast segment 120a and the pillar part upper precast segment 120b, and in the case of the assembly type foundation part 110, a socket type elastic duct coupler having a concave portion formed therein is embedded in the foundation part central precast segment 110a, and socket type elastic duct coupler having a convex portion formed thereon is embedded in each of the foundation part adjacent precast segments 110b, 110c, 110d, and 110e at both side surfaces, and in this way, shear key joining is also possible between the foundation part central precast segment 110a and the foundation part adjacent precast segments 110b, 110c, 110d, and 110e. Also, in the case of the assembly type coping part 130, a socket type elastic duct coupler having a concave portion formed therein is embedded in the coping part central precast segment 130a, and a socket type elastic duct coupler having a convex portion formed thereon is embedded in the coping part adjacent precast segments 130b and 130c at both side surfaces, and in this way, shear key joining is also possible between the coping part central precast segment 130a and the coping part adjacent precast segments 130b and 130c. Accordingly, a shear force may be further reinforced in addition to being reinforced by shear key joining configurations of the convex portion and the concave portion formed in advance in each of the precast segments.

[0108] Meanwhile, FIG. 12 is a view illustrating in detail the structure of the socket type elastic duct coupler 150 in the assembly type bridge lower structure having the socket type elastic duct coupler 150 according to an embodiment of the present disclosure.

[0109] First, the assembly type bridge lower structure 100 having the socket type elastic duct coupler 150 according to an embodiment of the present disclosure is an assembly type bridge lower structure including the assembly type foundation part 110, the assembly type pillar part 120, and the assembly type coping part 130. As the socket type elastic duct coupler 150, a duct coupler is formed of an elastic material such as rubber, and the socket type elastic duct coupler 150 is embedded in each of the precast segments and formed as upper and lower socket type elastic duct couplers.

[0110] Here, referring to FIG. 12, the socket type elastic duct coupler 150 may be applied to a vertical connection portion of the precast segments of the assembly type pillar part 120 and may be applied to horizontal connection portions of the precast segments of the assembly type foundation part 110 and the assembly type coping part

[0111] Here, the socket type elastic duct coupler 150 for arranging the insertion member 160 including a steel strand, a steel bar, a reinforcing bar, a FRP, or the like may be provided as a plurality of socket type elastic duct couplers 150 embedded in inner peripheral surfaces of the precast segments of each of the assembly type foundation part 110, the assembly type pillar part 120, and the assembly type coping part 130.

[0112] Specifically, as illustrated in FIG. 12, the socket type elastic duct coupler 150 is a duct coupler made of an elastic material such as rubber and includes the lower socket type elastic duct coupler 150a on which an elastic duct coupler convex portion 151 is formed and the upper socket type elastic duct coupler 150b in which an elastic duct coupler concave portion 152 is formed, and the lower socket type elastic duct coupler 150a and the upper socket type elastic duct coupler 150b may be connected to each other in the form of shear keys at a joining portion indicated by the reference numeral A. Also, the insertion member 160 including a steel strand, a steel bar, a reinforcing bar, a FRP, or the like may be inserted at a predetermined insertion angle into the sheath pipes 140 connected to each other by the socket type elastic duct coupler 150.

[0113] According to the socket type elastic duct coupler 150, construction errors of the duct-type sheath pipe 140 and the socket type elastic duct coupler 150 may be easily accommodated, watertightness at connection portions may be improved at horizontal joining portions of the upper and lower precast segments of the assembly type pillar part 120 and the central precast segment and the adjacent precast segments of each of the assembly type coping part 130 and the assembly type foundation part 110, and an insertion angle of the insertion member 160 including a steel strand, a steel bar, a reinforcing bar, a FRP, or the like may be easily accommodated.

[0114] Also, in a joining portion between the precast segments, by the socket type elastic duct coupler 150 serving to improve watertightness of the joining portion, it is possible to address an inconvenience of having to install other sealing members on an outer peripheral surface of the sheath pipe 140 or an outer peripheral surface of a shear connector or install other watertight members, such as a rubber pad, on a joining portion between the precast segments during joining of the precast segments.

[0115] Consequently, according to an embodiment of the present disclosure, the socket type elastic duct coupler 150 serves as a shear key and is able to reinforce a shear force during joining between the precast segments, construction errors of the socket type elastic duct coupler 150 may be easily accommodated by utilizing characteristics of the elastic material such as rubber, watertightness at connection portions may be improved at joining portions of the lower precast segment, and an insertion angle of the insertion member 160 including a steel strand, a steel bar, a reinforcing bar, a FRP, or the like may be easily accommodated.

[0116] Also, according to an embodiment of the present disclosure, in the assembly type pillar part of the assembly type bridge lower structure, shear key joining is performed due to shear keys provided in the form of a convex portion and a concave portion on the pillar part precast segments, and thus stability may be maintained during construction.

[0117] Also, according to an embodiment of the present disclosure, in the assembly type coping part of the assembly type bridge lower structure, shear key joining is performed due to shear keys provided in the form of a convex portion and a concave portion on the coping part central precast segment, and thus stability may be maintained during construction.

[0118] Also, according to an embodiment of the present disclosure, in the assembly type foundation part of the assembly type bridge lower structure, shear key joining is performed due to shear keys provided in the form of a convex portion and a concave portion on the foundation part central precast segment, and thus stability may be maintained during construction.

[0119] Thus, by performing shear key connection between transverse sheath pipes using the socket type elastic duct coupler, a shear force may be reinforced during horizontal connection of the precast segments of the foundation part, the pillar part, and the coping part.

[0120] [Method of Constructing Assembly Type Bridge Lower Structure Having Socket Type Elastic Duct Coupler]

[0121] FIG. 13 is an operational flowchart illustrating a method of constructing an assembly type bridge lower structure having a socket type elastic duct coupler according to an embodiment of the present disclosure.

[0122] Referring to FIG. 13, in the method of constructing the assembly type bridge lower structure having the socket type elastic duct coupler according to an embodiment of the present disclosure, first, for construction of a foundation part of the assembly type bridge lower structure, foundation part precast segments 110a, 110b, 110c, 110d, and 110e into which a socket type elastic duct coupler 150 is inserted are formed (S110). Here, the socket type elastic duct coupler 150 is a duct coupler made of an elastic material such as rubber and includes a lower socket type elastic duct coupler 150a on which an elastic duct coupler convex portion 151 is formed and an upper socket type elastic duct coupler 150b in which an elastic duct coupler concave portion 152 is formed, and the lower socket type elastic duct coupler 150a and the upper socket type elastic duct coupler 150b may be connected to each other in the form of shear keys.

[0123] Next, each of the foundation part precast segments 110a, 110b, 110c, 110d, and 110e into which the socket type elastic duct coupler 150 is inserted are assembled and connected in a horizontal direction and a vertical direction to complete an assembly type foundation part 110 (S120). Here, the foundation part precast segments 110a, 110b, 110c, 110d, and 110e may include a foundation part central precast segment 110a and foundation part adjacent precast segments 110b, 110c, 110d, and 110e assembled to both sides of the foundation part central precast segment 110a, and the foundation part central precast segment 110a and the foundation part adjacent precast segments 110b, 110c, 110d, and 110e may each have a convex portion formed on one side and a concave portion formed in the other side and may be connected in the form of shear keys.

[0124] Accordingly, in the case of the assembly type foundation part 110 of the complete assembly type bridge lower structure according to an embodiment of the present disclosure, a central socket type elastic duct coupler having a convex portion formed in the vertical direction and a concave portion formed in the horizontal direction is embedded in the central portion, an adjacent socket type elastic duct coupler having a concave portion formed in the vertical direction is embedded in the upper precast segment of the assembly type pillar part, and an adjacent socket type elastic duct coupler having a convex portion formed in the horizontal direction is embedded in the adjacent portions of the assembly type foundation part 110, and in this way, shear key joining is possible with the precast segments of the assembly type pillar part in the vertical direction, and shear key joining of the adjacent portions of the assembly type foundation part 110 is possible in the horizontal direction.

[0125] Next, for construction of the assembly type pillar part of the assembly type bridge lower structure, pillar part precast segments 120a and 120b into which the socket type elastic duct coupler is inserted are formed (S130).

[0126] Next, each of the pillar part precast segments 120a and 120b into which the socket type elastic duct coupler is inserted is assembled and connected in the vertical direction to complete the assembly type pillar part 120 (S140). Here, the pillar part precast segments 120a and 120b may include a pillar part lower precast segment 120a and a pillar part upper precast segment 120b assembled onto the pillar part lower precast segment 120a, and the pillar part lower precast segment 120a and the pillar part upper precast segment 120b may each have a convex portion formed on one side and a concave portion formed in the other side and may be connected in the form of shear keys. Accordingly, in the case of the assembly type pillar part 120 of the complete assembly type bridge lower structure 100 according to an embodiment of the present disclosure, the socket type elastic duct coupler 150, such as rubber, is provided as a plurality of socket type elastic duct couplers 150 embedded in inner peripheral surfaces of the precast segments, an upper socket type elastic duct coupler in which a concave portion is formed is embedded in the upper precast segment, and a lower socket type elastic duct coupler on which a convex portion is formed is embedded in the lower precast segment, and in this way, shear key joining is also possible between the upper precast segment and the lower precast segment.

[0127] Next, for construction of an assembly type coping part of the assembly type bridge lower structure, coping part precast segments 130a, 130b, and 130c into which the socket type elastic duct coupler is inserted are formed (S150).

[0128] Next, each of the coping part precast segments 130a, 130b, and 130c into which the socket type elastic duct coupler is inserted are assembled and connected in the horizontal direction to complete the assembly type coping part 130 (S160). Here, the coping part precast segments 130a, 130b, and 130c may include a coping part central precast segment 130a and coping part adjacent precast segments 130b and 130c assembled to both sides of the coping part central precast segment 130a, and the coping part central precast segment 130a and the coping part adjacent precast segments 130b and 130c may each have a convex portion formed on one side and a concave portion formed in the other side and may be connected in the form of shear keys. Accordingly, in the case of the assembly type coping part 130 of the complete assembly type bridge lower structure according to an embodiment of the present disclosure, a central socket type elastic duct coupler having a concave portion formed therein is embedded in the central precast segment, and an adjacent socket type elastic duct coupler having a convex portion formed thereon is embedded in the adjacent precast segments, and in this way, shear key joining in the horizontal direction is possible between the central precast segment and the adjacent precast segments.

[0129] Also, the duct-type sheath pipe 140 is embedded in each of the foundation part precast segments 110a, 110b, 110c, 110d, and 110e, the pillar part precast segments 120a and 120b, and the coping part precast segments 130a, 130b, and 130c, and the socket type elastic duct coupler 150 connects each of the sheath pipes 140. Also, the insertion member 160 including a steel strand, a steel bar, a reinforcing bar, a FRP, or the like may be inserted at a predetermined insertion angle into the sheath pipes 140 connected to each other by the socket type elastic duct coupler 150.

[0130] Accordingly, the assembly type bridge lower structure 100 formed of the assembly type foundation part 110, the assembly type pillar part 120, and the assembly type coping part 130 according to an embodiment of the present disclosure is completed. Subsequently, by constructing a girder, a slab, and the like, which are assembly type bridge upper structures, on an upper portion of the assembly type bridge lower structure 100, an assembly type bridge may be completed.

[0131] Consequently, according to an embodiment of the present disclosure, in construction of the assembly type bridge lower structure that consists of the assembly type foundation part, the assembly type pillar part, and the assembly type coping part, by utilizing the socket type elastic duct coupler, shear key joining is possible at connection portions of the assembly type foundation part, the assembly type pillar part, and the assembly type coping part, and construction error displacements of the socket type elastic duct coupler may be easily accommodated. Also, by utilizing the socket type elastic duct coupler, watertightness at connection portions of the precast segments may be improved, and an insertion angle of the insertion member including a steel strand, a steel bar, a reinforcing bar, a FRP, or the like may be easily accommodated. Also, an overflow phenomenon that occurs when epoxy is excessively applied during bonding between the precast segments may be prevented.

[0132] According to the present disclosure, in construction of an assembly type bridge lower structure that consists of an assembly type foundation part, an assembly type pillar part, and an assembly type coping part, by utilizing a socket type elastic duct coupler, shear key joining is possible at connection portions of the assembly type foundation part, the assembly type pillar part, and the assembly type coping part, and construction error displacements of the socket type elastic duct coupler can be easily accommodated.

[0133] According to the present disclosure, by utilizing a socket type elastic duct coupler, watertightness at connection portions of precast segments can be improved, and an insertion angle of an insertion member including a steel strand, a steel bar, a reinforcing bar, a FRP, or the like can be easily accommodated.

[0134] According to the present disclosure, it is possible to prevent an overflow phenomenon that occurs when epoxy is excessively applied during bonding between precast segments.

[0135] According to the present disclosure, in the assembly type pillar part in the assembly type bridge lower structure, since pillar part precast segments have shear keys provided in the form of a convex portion and a concave portion and shear key joining is performed, stability can be maintained during construction.

[0136] According to the present disclosure, in the assembly type coping part in the assembly type bridge lower structure, since a coping part central precast segment has shear keys provided in the form of a convex portion and a concave portion and shear key joining is performed, stability can be maintained during construction.

[0137] According to the present disclosure, in the assembly type foundation part in the assembly type bridge lower structure, by shear key connection of transverse sheath pipes using a socket type elastic duct coupler, a shear force can be reinforced during horizontal connection of foundation part precast segments.

[0138] The above-given description of the present disclosure is merely illustrative, and those of ordinary skill in the art to which the present disclosure pertains should understand that the present disclosure may be easily modified in other specific forms without changing the technical spirit or essential features of the present disclosure. Therefore, the embodiments described above should be understood as being illustrative, instead of limiting, in all aspects. For example, each element described as a single type may also be embodied in a distributed manner, and likewise, elements described as being distributed may also be embodied in a combined form.

[0139] The scope of the present disclosure is defined by the appended claims rather than by the detailed description above, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be interpreted as falling within the scope of the present disclosure.