FRP COMPOSITE MATERIAL PILE PREPARED BY FRP COMPOSITE MATERIAL AND PREPARATION AND PILE FORMING METHODS

Abstract

The present disclosure discloses a fiber reinforce plastic (FRP) composite material pile prepared by an FRP composite material. The FRP composite material pile includes: an FRP winding pipe, an FRP pultrusion hollow profile, and a connecting device. The FRP pultrusion hollow profile includes an outer ring pipe, an inner ring pipe, and a plurality of reinforcing bars. The FRP pultrusion hollow profile is pultruded at one time by pultrusion equipment, and fiber materials thereof are arranged in the longitudinal direction of the pipe. The FRP winding pipe is provided with circumferential fiber materials by taking the FRP pultrusion hollow profile as a membrane, and forms a composite pipe section with the FRP pultrusion hollow profile. The inner ring shape of the cross section of the FRP winding pipe is matched with the FRP pultrusion hollow profile. The FRP connecting device includes connecting plates, connecting bars, and connecting pins.

Claims

1. An FRP composite material pile prepared by an FRP composite material, comprising: an FRP winding pipe, an FRP pultrusion hollow profile, and a connecting device, wherein the FRP pultrusion hollow profile comprises an outer ring pipe, an inner ring pipe, and a plurality of reinforcing bars for connecting the outer ring pipe and the inner ring pipe; the shape of the cross section of the outer ring pipe is a circle or a square with chamfers; the FRP pultrusion hollow profile is pultruded at one time by pultrusion equipment, and fiber materials thereof are arranged in the longitudinal direction of the pipe; the FRP winding pipe is provided with circumferential fiber materials by taking the FRP pultrusion hollow profile as a membrane, and forms a composite pipe section with the FRP pultrusion hollow profile; the inner ring shape of the cross section of the FRP winding pipe is matched with the FRP pultrusion hollow profile; the FRP connecting device comprises connecting plates, connecting bars, and key grooves; the outer ring shapes of the cross sections of the connecting plates are matched with composite pipe sections; the connecting bars are inserted into the connecting plates; key grooves matched with the connecting pins and used for connecting are also formed in the connecting plates; the connecting pins are used for connecting two connecting plates through the key grooves, so that the connection of two composite pipe sections is realized; a plurality of the composite pipe sections are connected to form the FRP composite material pile.

2. The FRP composite material pile prepared by an FRP composite material according to claim 1, wherein the reinforcing bars between the outer ring pipe and the inner ring pipe are arranged in circumferential symmetry; the space between an inner pipe and an outer pipe is divided into a plurality of cavities by the reinforcing bars; a cavity is also formed in the inner pipe; the cavity is used for filling a cement-based material during pile forming.

3. The FRP composite material pile prepared by an FRP composite material according to claim 1, wherein connecting bars arranged on the connecting plates are arranged in circumferential symmetry; the key grooves are also formed in circumferential symmetry.

4. The FRP composite material pile prepared by an FRP composite material according to claim 1, wherein the connecting bars are reinforcing steel bars or FRP bars.

5. The FRP composite material pile prepared by an FRP composite material according to claim 3, wherein the connecting bars are reinforcing steel bars or FRP bars.

6. The FRP composite material pile prepared by an FRP composite material according to claim 1, wherein the connecting pins are I-shaped, Z-shaped or frame-shaped.

7. The FRP composite material pile prepared by an FRP composite material according to claim 1, wherein connecting bars are also arranged symmetrically.

8. The FRP composite material pile prepared by an FRP composite material according to claim 1, wherein the thickness of the connecting plates is 30 mm to 60 mm, and the length of the connecting bars is 30 to 40 times the diameter of the reinforcing steel bar.

9. A preparation method for the FRP composite material pile according to claim 1, comprising the following steps: (1) processing and manufacturing connecting plates, connecting pins, and connecting bars of an FRP connecting device, and processing connecting key grooves matched with the connecting pins; (2) preparing an FRP pultrusion hollow profile by pultrusion equipment, wherein the length of the pipe is 3 m to 5 m; (3) manufacturing a circumferential FRP winding pipe by taking the FRP pultrusion hollow profile as a membrane to obtain a composite pipe section; (4) connecting a connecting plate of the FRP connecting device to one end of the composite pipe section, and performing sealing treatment; (5) connecting the connecting plates of the FRP connecting device by using the connecting pins to realize the connection of two composite pipe sections until the composite pipe sections in the number required by a design are connected to form the FRP composite material pile.

10. The preparation method for the FRP composite material pile according to claim 9, wherein the reinforcing bars between the outer ring pipe and the inner ring pipe are arranged in circumferential symmetry; the space between an inner pipe and an outer pipe is divided into a plurality of cavities by the reinforcing bars; a cavity is also formed in the inner pipe; the cavity is used for filling a cement-based material during pile forming.

11. The preparation method for the FRP composite material pile according to claim 9, wherein connecting bars arranged on the connecting plates are arranged in circumferential symmetry; the key grooves are also formed in circumferential symmetry.

12. The preparation method for the FRP composite material pile according to claim 9, wherein the connecting bars are reinforcing steel bars or FRP bars.

13. The preparation method for the FRP composite material pile according to claim 11, wherein the connecting bars are reinforcing steel bars or FRP bars.

14. The preparation method for the FRP composite material pile according to claim 9, wherein the connecting pins are I-shaped, Z-shaped or frame-shaped.

15. The preparation method for the FRP composite material pile according to claim 9, wherein connecting bars are also arranged symmetrically.

16. The preparation method for the FRP composite material pile according to claim 9, wherein the thickness of the connecting plates is 30 mm to 60 mm, and the length of the connecting bars is 30 to 40 times the diameter of the reinforcing steel bar.

17. A pile forming method for the FRP composite material pile prepared by the FRP composite material according to claim 1, comprising the following steps: (1) after connecting the connecting plate and the composite pipe section, pouring cement-based filler in the cavities of the composite pipe section, wherein the strength of the filler is not less than 30 MPa, layered pouring is adopted during pouring, and vibrating is performed while pouring, so that the filler is compact; (2) after the pouring of one composite pipe section is completed, inserting the connecting bars of the FRP connecting device into the filler in top cavities to form a whole body, and curing to complete the pouring of one composite pipe section; (3) connecting, by using the connecting pins, the poured composite pipe section to a composite pipe section to be poured, and operating according to the foregoing method, and continuing performing pouring of the composite pipe sections until completing the pile forming of the overall FRP composite material pile.

18. The pile forming method for the FRP composite material pile prepared by the FRP composite material according to claim 16, wherein the reinforcing bars between the outer ring pipe and the inner ring pipe are arranged in circumferential symmetry; the space between an inner pipe and an outer pipe is divided into a plurality of cavities by the reinforcing bars; a cavity is also formed in the inner pipe; the cavity is used for filling a cement-based material during pile forming.

19. The pile forming method for the FRP composite material pile prepared by the FRP composite material according to claim 16, wherein connecting bars arranged on the connecting plates are arranged in circumferential symmetry; the key grooves are also formed in circumferential symmetry.

20. The pile forming method for the FRP composite material pile prepared by the FRP composite material according to claim 16, wherein the connecting bars are reinforcing steel bars or FRP bars.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0035] FIG. 1 is a schematic diagram of a cross section structure of an FRP composite material pile of the present disclosure;

[0036] FIG. 2 is a schematic diagram of another cross section structure of the FRP composite material pile of the present disclosure;

[0037] FIG. 3 is a schematic diagram of a cross section structure of an FRP connecting device;

[0038] FIG. 4 is a schematic diagram of another cross section structure of the FRP connecting device;

[0039] FIG. 5 to FIG. 7 are four schematic structural diagrams of the FRP connecting device when connected;

[0040] FIG. 8 is a schematic structural diagram of the FRP composite material pile.

DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS

[0041] The specific technical solution of the present disclosure is further described below, which facilitates further understanding of the present disclosure by those skilled in the art, and does not constitute a restriction on its rights.

[0042] Embodiment 1, referring to FIG. 8, an FRP composite material pile prepared by an FRP composite material includes: an FRP winding pipe 1, an FRP pultrusion hollow profile, and a connecting device.

[0043] Referring to FIG. 1, the FRP pultrusion hollow profile includes an outer ring pipe 2, an inner ring pipe 3, and a plurality of reinforcing bars 4 for connecting the outer ring pipe 2 and the inner ring pipe 3. Referring to FIG. 2, the shape of the cross section of the outer ring pipe 2 is a circle or the shape of the cross section of the outer ring pipe 2 is a square with chamfers. The FRP pultrusion hollow profile is pultruded at one time by pultrusion equipment, and fiber materials thereof are arranged in the longitudinal direction of the pipe.

[0044] The FRP winding pipe 1 is provided with circumferential fiber materials by taking the FRP pultrusion hollow profile as a membrane, and forms a composite pipe section with the FRP pultrusion hollow profile; the inner ring shape of the cross section of the FRP winding pipe 1 is matched with the FRP pultrusion hollow profile.

[0045] Referring to FIGS. 3 and 4, the FRP connecting device includes connecting plates 6, connecting bars 7, and key grooves 8; the outer ring shapes of the cross sections of the connecting plates 6 are matched with the composite pipe sections; the connecting bars 7 are inserted into the connecting plates 6; key grooves 8 matched with the connecting pins 9 and used for connecting are also formed in the connecting plates 6; the connecting pins 7 are used for connecting two connecting plates 6 through the key grooves 8, so that the connection of two composite pipe sections is realized; a plurality of the composite pipe sections are connected to form the FRP composite material pile.

[0046] Referring to FIGS. 1 and 2, the reinforcing bars 4 between the outer ring pipe 2 and the inner ring pipe 3 are arranged in circumferential symmetry; the space between an inner pipe and an outer pipe is divided into a plurality of cavities by the reinforcing bars 4; a cavity is also formed in the inner pipe; the cavities are used for filling a cement-based material 5 during pile forming.

[0047] Referring to FIG. 3, the connecting bars 7 arranged on the connecting plates 6 are preferably arranged in circumferential symmetry. The key grooves 8 are also formed in circumferential symmetry. The connecting bars 7 are reinforcing bars or FRP bars. The connecting reinforcing bars 7 are also arranged symmetrically.

[0048] The connecting pins 9 may be I-shaped, referring to FIG. 5, may also be Z-shaped, referring to FIG. 6, and may also be frame-shaped, referring to FIG. 7.

[0049] The thickness of the connecting plate is preferably 40 mm to 50 mm; the length of the connecting bar is 35 times the diameter of the reinforcing bar.

[0050] Embodiment 2, a preparation method for the FRP composite material pile of the Embodiment 1 includes the following steps:

[0051] (1) processing and manufacturing connecting plates, connecting pins, and connecting bars of an FRP connecting device, and processing connecting key grooves matched with the connecting pins;

[0052] (2) preparing an FRP pultrusion hollow profile by pultrusion equipment, where the length of the pipe is 3 m to 5 m;

[0053] (3) manufacturing a circumferential FRP winding pipe by taking the FRP pultrusion hollow profile as a membrane to obtain a composite pipe section;

[0054] (4) connecting the connecting plate of the FRP connecting device to one end of the composite pipe section, and performing sealing treatment;

[0055] (5) connecting the connecting plates of the FRP connecting device by using the connecting pins to realize the connection of two composite pipe sections until the composite pipe sections in the number required by a design are connected to form the FRP composite material pile.

[0056] Embodiment 3, a pile forming method using the FRP composite material pile prepared in Embodiment 2 includes the following steps:

[0057] (1) after connecting the connecting plate and the composite pipe section, pouring cement-based filler in the cavities of the composite pipe section, where the strength of the filler is not less than 30 MPa, layered pouring is adopted during pouring, and vibrating is performed while pouring, so that the filler is compact;

[0058] (2) after the pouring of one composite pipe section is completed, inserting the connecting bars of the FRP connecting device into the filler in top cavities to form a whole body, and curing to complete the pouring of one composite pipe section;

[0059] (3) connecting, by using the connecting pins, the poured composite pipe section to a composite pipe section to be poured, and operating according to the foregoing method, continuing performing pouring of the composite pipe sections until completing pile forming of the overall FRP composite material pile.