Structural steel inner support system in foundation pit

Abstract

The present invention discloses a structural steel inner support system in a foundation pit which ensures the support density of the structural steel inner support beam of the inner support system for foundation pits and improves structural stability and reliability of inner support of foundation pits. The system includes a purlin assembly, a plurality of vertical force-guiding connecting members including support members, upper force-guiding connecting beams and lower force-guiding connecting beams in the foundation pit; and a structural steel inner support beam and a prestress-pressing member in the foundation pit.

Claims

1. A structural steel inner support system in a foundation pit, comprising: a purlin assembly, wherein the purlin assembly comprises an upper purlin and a lower purlin arranged at an inner side of an enclosing pile of the foundation pit, wherein the enclosing pile is vertically disposed; a plurality of vertical force-guiding connecting members connecting the upper purlin to the lower purlin; wherein each of the vertical force-guiding connecting members comprises a support member, an upper force-guiding connecting beam and a lower force-guiding connecting beam connected with the upper force-guiding connecting beam by the support member; one end of the upper force-guiding connecting beam is connected to the support member and the other end extends obliquely upward to a direction of the upper purlin and is connected to the upper purlin; one end of the lower force-guiding connecting beam is connected to the support member and the other end extends obliquely downward to a direction of the lower purlin and is connected to the lower purlin; the support member, the upper force-guiding connecting beam and the lower force-guiding connecting beam jointly forms a triangular support structure; and a structural steel inner support beam and a prestress-pressing member in the foundation pit; wherein one end of the structural steel inner support beam abuts against a support component of the prestress-pressing member; the prestress-pressing member comprises two mutually openable support parts; wherein one support part abuts on the support member of each of the vertical force-guiding connecting members; and the other support part is connected to an end portion of the structural steel inner support beam through bolts.

2. The structural steel inner support system in the foundation pit of claim 1, wherein an inclined angle of the upper force-guiding connecting beam is identical to an inclined angle of the lower force-guiding connecting beam.

3. The structural steel inner support system in the foundation pit of claim 1, wherein an inclined angle of the upper force-guiding connecting beam is greater than an inclined angle of the lower force-guiding connecting beam.

4. The structural steel inner support system in the foundation pit of claim 1, wherein the upper force-guiding connecting beam comprises a plurality of upper H beams arranged side by side and a plurality of upper connecting beams connecting the upper H beams; and the upper H beams are parallel to each other; and one of the upper connecting beams is perpendicular to one of the upper H beams.

5. The structural steel inner support system in the foundation pit according to claim 1, wherein the lower force-guiding connecting beam comprises a plurality of lower H beams arranged side by side and lower connecting beams connecting the lower H beams, and the lower H beams are parallel to each other, and one of the lower connecting beams is perpendicular to one of the lower H beams.

6. The structural steel inner support system in the foundation pit of claim 1, wherein a vertical connecting shaft rod is arranged between the upper force-guiding connecting beam and the lower force-guiding connecting beam.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a structural schematic view of structural steel inner support system in a foundation pit according to embodiment 1 of the present invention.

(2) FIG. 2 is a partial structural schematic view of structural steel inner support system in a foundation pit according to embodiment 3 of the present invention.

(3) FIG. 3 is a partial enlargement view of A in FIG. 2.

In the Drawings

(4) 1. enclosing pile; 2. purlin assembly; 2.1 upper purlin; 2.2 lower purlin; 3. vertical force-guiding connecting member; 3.1 support member; 3.2 upper force-guiding connecting beam; 3.21 upper H beam; 3.22 upper connecting beam; 3.3 lower force-guiding connecting beam; 3.31 lower H beam; 3.32 lower connecting beam; 4. prestress-pressing member; 4.1 support component; 5. structural steel inner support beam; 6. rotating connecting mechanism; 6.1 rotating mechanism; 6.11 support base; 6.12 vertical shaft rod; 6.13 connecting base; 6.2 tie beam.

DETAILED DESCRIPTION

(5) The present invention will be further described in detail below with reference to the drawings and specific embodiments.

Embodiment 1

(6) As shown in FIG. 1, a structural steel inner support system in a foundation pit, includes a purlin assembly 2, a plurality of vertical force-guiding connecting members 3, and a structural steel inner support beam 5 and a prestress-pressing member 4 in a foundation pit.

(7) The same purlin assembly includes an upper purlin 2.1 and a lower purlin 2.2 arranged inside an enclosing pile 1 of a foundation pit. The upper purlin is located above the lower purlin. The upper purlin is parallel to the lower purlin.

(8) A vertical connecting member is arranged to connect the upper and lower purlins. The vertical connecting member includes a support member 3.1, an upper force-guiding connecting beam 3.2 and a lower force-guiding connecting beam 3.3 arranged below the upper force-guiding connecting beam 3.2 in the foundation pit. One end of the upper force-guiding connecting beam is connected to the support member, and the other end of the upper force-guiding connecting beam extends obliquely upward to a direction of the upper purlin and is connected to the upper purlin; one end of the lower force-guiding connecting beam is connected to the support member and the other end extends obliquely downward to a direction of the lower purlin and is connected to the lower purlin; a triangular support structure is formed by the support member, the upper force-guiding connecting beam and the lower force-guiding connecting beam together.

(9) The inclined angle of the upper force-guiding connecting beam is identical to the inclined angle of the lower force-guiding connecting beam.

(10) The upper force-guiding connecting beam includes a plurality of upper H beams arranged side by side and a plurality of upper connecting beams connecting the upper H beams. Each of the upper H beams is parallel to each other, and one upper connecting beam is perpendicular to one upper H beam. The lower force-guiding connecting beam includes a plurality of lower H beams arranged side by side and a plurality of lower connecting beams connecting the respective H beams. Each of the lower H beams is parallel to each other, and one lower connecting beam is perpendicular to one lower H beam. A vertical connecting shaft rod is arranged between the upper force-guiding connecting beam and the lower force-guiding connecting beam.

(11) One end of the structural steel inner support beam abuts against the support member of one vertical force-guiding connecting member. The other end of structural steel inner support beam abuts against the support member of the other vertical force-guiding connecting member through a prestress-pressing member.

(12) The prestress-pressing member includes two mutually openable support parts 4.1, wherein one support part abuts on the support member of the purlin, and the other support part is connected to the end portion of the structural steel inner support beam through bolts.

Embodiment 2

(13) The remaining structure of this embodiment refers to Embodiment 1, and the difference is:

(14) The inclined angle of the upper force-guiding connecting beam is greater than the inclined angle of the lower force-guiding connecting beam, and the difference between the inclined angle of the upper force-guiding connecting beam and the inclined angle of the lower force-guiding connecting beam is 5-10 degrees.

Embodiment 3

(15) The remaining structure of this embodiment refers to Embodiment 1, and the difference is:

(16) As shown in FIG. 2 and FIG. 3, a plurality of structural steel inner support beams are provided in this embodiment. A plurality of rotating connecting mechanism 6 are also arranged between the two adjacent structural steel inner support beams.

(17) The rotating connecting mechanism includes a tie beam 6.2 and two rotating mechanisms 6.1, one rotating mechanism is arranged on a structural steel inner support beam and the other is arranged on another structural steel inner support beam. The rotating mechanism includes a support base 6.11 arranged on a structural steel inner support beam, and a connecting base 6.13 arranged on the support base through the vertical shaft rod 6.12. The support base is connected to the structural steel inner support beam through bolts.

(18) The tie beam is arranged horizontally. One end of the tie beam is connected to the connecting base of one rotating mechanism, and the other end of the tie beam is connected to the connecting base of the other rotating mechanism. The tie beam is connected to the connecting base through bolts. The angle between the tie beam and the structural steel inner support beam of the steel is 45 degrees.

(19) In each of the rotating connecting mechanisms arranged between two adjacent structural steel inner support beams: the tie beams of the two adjacent rotating connecting mechanisms are arranged in a splayed shape.