Cast-in-situ bored pile based on FRP rib

Abstract

The utility model provides a cast-in-situ bored pile based on FRP ribs. The cast-in-situ bored pile is formed in a preset foundation pit in a designated area. The cast-in-situ bored pile comprises a pile body and an FRP reinforcement cage arranged in the pile body. The FRP reinforcement cage comprises an FRP reinforcement cage body, a counterweight cage and annular first stirrups, the counterweight cage is embedded in the lower end of the FRP reinforcement cage body, the first stirrups are connected to the bottom of the FRP reinforcement cage body, and a plurality of anchor rods are evenly distributed at the lower end of the first stirrups; and when the FRP reinforcement cage body is placed in the preset foundation pit, the anchor rods extend into and penetrate through the bottom of the preset foundation pit so as to reinforce the FRP reinforcement cage body. According to the cast-in-situ bored pile, the problems that an existing cast-in-situ bored pile is poor in stability and the safety of a building is difficult to guarantee due to the fact that the existing cast-in-situ bored pile lacks corresponding reinforcing measures can be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bored cast-in-place piles, and more specifically relates to a bored cast-in-place pile based on FRP bars. Background Art

[0002] In construction, bored piles are a type of underground pile created by placing a reinforced cage in a pre-set foundation pit and then pouring concrete. They are often used in building pile foundations due to their high load-bearing capacity, flexible construction, minimal environmental impact, and relatively short construction periods.

[0003] However, the existing bored pile reinforcement cages are simple in structure and lack appropriate reinforcement measures, which can lead to the cages being easily offset during concrete pouring. This can cause uneven stress on the bored piles after they are formed, leading to deformation and collapse. This affects the use of the bored piles, resulting in poor stability and difficulty ensuring building safety. Furthermore, the steel bars used in the bored pile reinforcement cages are susceptible to corrosion, which can damage the bored piles, especially in offshore or marine environments, salt crystallization environments, and chemical corrosion environments. This can accelerate the corrosion of the steel bars, significantly degrading the bearing capacity of the bored piles. Therefore, existing bored piles still need further improvement. Utility Model Content

[0004] The purpose of the utility model is to solve the problem that the existing bored piles lack corresponding reinforcement measures, resulting in poor stability and difficulty in ensuring the safety of buildings.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a bored cast-in-place pile based on FRP bars, which is formed in a preset foundation pit in a designated area;

[0006] The bored pile comprises a pile body and an FRP reinforcement cage arranged in the pile body;

[0007] The FRP cage includes an FRP cage body, a counterweight cage and a first annular stirrup, wherein the counterweight cage is embedded in the lower end of the FRP cage body, the first stirrup is connected to the bottom of the FRP cage body, and a plurality of anchor rods are evenly distributed at the lower end thereof;

[0008] When the FRP cage body is placed in the preset foundation pit, a plurality of anchor rods extend into and penetrate the bottom of the preset foundation pit to reinforce the FRP cage body.

[0009] Optionally, each of the plurality of anchor rods includes a supporting rib and a triangular anchor head, and the anchor head is connected to the first stirrup via the supporting rib.

[0010] Optionally, the counterweight cage includes a second stirrup layer and a first longitudinal reinforcement layer, and the first longitudinal reinforcement layer includes a plurality of first longitudinal reinforcements uniformly distributed on the outer wall of the second stirrup layer along the circumference of the second stirrup layer.

[0011] Optionally, the second stirrup layer includes a plurality of second stirrups equidistantly distributed along the extension direction of the plurality of first longitudinal reinforcements.

[0012] Optionally, the FRP cage body includes a third stirrup layer, a second longitudinal reinforcement layer and a spiral reinforcement layer arranged in sequence from the inside to the outside, and the second longitudinal reinforcement layer includes a plurality of second longitudinal reinforcements uniformly distributed along the circumference of the third stirrup layer.

[0013] Optionally, the third stirrup layer includes a plurality of third stirrups equidistantly distributed along the extension direction of the plurality of second longitudinal reinforcements.

[0014] Optionally, the spiral reinforcement layer is formed by a plurality of FRP reinforcements spirally wound around a plurality of the second longitudinal reinforcements.

[0015] Optionally, the first stirrups, the plurality of the second stirrups and the plurality of the third stirrups are all annular structures made of fiber-reinforced composite materials.

[0016] Optionally, the supporting ribs, the plurality of the first longitudinal ribs and the plurality of the second longitudinal ribs are all columnar structures made of fiber-reinforced composite materials.

[0017] The beneficial effects of the present invention are:

[0018] The FRP-rebar-based bored pile proposed in this utility model incorporates a counterweight cage at the lower end of the FRP cage body and connects the first stirrup to the bottom of the FRP cage body. This allows the evenly distributed anchor rods at the lower end of the first stirrup to extend into and penetrate the bottom of the pre-set foundation pit when the FRP cage body is placed in the pre-set foundation pit, thereby reinforcing the FRP cage. Compared to existing bored piles, the bored pile of this utility model utilizes a counterweight cage to add weight to the lower end of the FRP cage body, thereby shifting the center of gravity of the FRP cage downward, improving the stability of the FRP cage during concrete pouring and effectively preventing its displacement. Combined with the provision of several anchor rods, the FRP cage can be better connected to the pre-set foundation pit, ensuring the balance of the FRP cage, thereby improving the stability and safety of the bored pile.

[0019] According to the above content, the present invention can effectively solve the problem that the existing bored piles lack corresponding reinforcement measures, resulting in poor stability and difficulty in ensuring the safety of buildings.

[0020] Other features and advantages of the present invention will be described in detail in the subsequent detailed description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention can be better understood by referring to the following description made in conjunction with the accompanying drawings, in which the same or similar reference numerals are used throughout the drawings to represent the same or similar components.

[0022] Figure 1 The figure shows a schematic structural diagram of an FRP reinforcement cage according to an embodiment of the present invention;

[0023] Figure 2 A schematic structural diagram of a bored pile based on FRP bars according to an embodiment of the present utility model is shown.

[0024] Reference numerals:

[0025] 1-Pile body;

[0026] 2-first stirrup;

[0027] 3- spiral rib layer;

[0028] 4-second longitudinal tendon;

[0029] 5-the third stirrup;

[0030] 6-first longitudinal reinforcement;

[0031] 7-Second stirrup;

[0032] 8-Support ribs;

[0033] 9-Anchor head. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to more fully understand the technical solution of the present invention, the exemplary embodiments of the present invention will be described in more comprehensive and detailed in conjunction with the accompanying drawings below. Obviously, the one or more embodiments of the present invention described below are only one or more of the specific ways of implementing the technical solution of the present invention, and are not exhaustive. It should be understood that other ways belonging to a general utility model concept can be used to implement the technical solution of the present invention, and should not be limited by the exemplary embodiments described. Based on one or more embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present invention.

[0035] Example: Figure 1 The figure shows a schematic structural diagram of an FRP reinforcement cage according to an embodiment of the present invention; Figure 2A schematic structural diagram of a bored pile based on FRP bars according to an embodiment of the present utility model is shown.

[0036] Reference Figure 1-2 , an embodiment of the utility model provides a bored cast-in-place pile based on FRP bars, formed in a preset foundation pit in a designated area;

[0037] The bored pile comprises a pile body 1 and an FRP reinforcement cage arranged in the pile body 1;

[0038] The FRP cage includes an FRP cage body, a counterweight cage and a first annular stirrup 2. The counterweight cage is embedded in the lower end of the FRP cage body. The first stirrup 2 is connected to the bottom of the FRP cage body, and a number of anchor rods are evenly distributed at its lower end.

[0039] When the FRP cage body is placed in a preset foundation pit, a number of anchor rods extend into and penetrate the bottom of the preset foundation pit to reinforce the FRP cage body.

[0040] In one embodiment, the FRP cage body includes a third stirrup layer, a second longitudinal reinforcement layer and a spiral reinforcement layer 3 arranged in sequence from the inside to the outside, and the second longitudinal reinforcement layer includes a plurality of second longitudinal reinforcements 4 evenly distributed along the circumference of the third stirrup layer.

[0041] In a specific embodiment, the third stirrup layer includes a plurality of third stirrups 5 equidistantly distributed along the extension direction of the plurality of second longitudinal bars 4 .

[0042] In a specific embodiment, the spiral reinforcement layer 3 is formed by a plurality of FRP reinforcements spirally wound around a plurality of second longitudinal reinforcements 4 .

[0043] In one embodiment, the counterweight cage includes a second stirrup layer and a first longitudinal reinforcement layer, and the first longitudinal reinforcement layer includes a plurality of first longitudinal reinforcements 6 uniformly distributed on the outer wall of the second stirrup layer along the circumference of the second stirrup layer.

[0044] In a specific embodiment, the second stirrup layer includes a plurality of second stirrups 7 equidistantly distributed along the extension direction of the plurality of first longitudinal bars 6 .

[0045] In a specific embodiment, the first stirrup 2, the plurality of second stirrups 7 and the plurality of third stirrups 5 are all annular structures made of fiber-reinforced composite materials.

[0046] In one embodiment, each of the plurality of anchor rods includes a support rib 8 and a triangular anchor head 9, which is connected to the first stirrup 2 via the support rib 8. Of course, it should be appreciated that the anchor head can also have other shapes, and the present invention is not limited thereto. Any shape of anchor head that can achieve the same technical effect of the present invention is also within the scope of protection of the present invention.

[0047] In a specific embodiment, the supporting ribs 8, the plurality of first longitudinal ribs 6 and the plurality of second longitudinal ribs 4 are all columnar structures made of fiber-reinforced composite materials.

[0048] Specifically, fiber-reinforced composite materials, namely FRP bars, have the advantages of no magnetic induction, high strength, corrosion resistance and low cost. They can effectively reduce the rust rate of FRP bar cages in offshore or marine environments, salt crystallization environments and chemical corrosion environments, and can ensure the bearing capacity of bored piles, thereby extending the service life of bored piles.

[0049] In a specific embodiment, the first stirrups 2, the spiral reinforcement layer 3, the plurality of second longitudinal reinforcements 4, the plurality of third stirrups 5, the plurality of first longitudinal reinforcements 6, the plurality of second stirrups 7 and the support reinforcement 8 are all connected by welding or epoxy resin.

[0050] During the formation process of the bored cast-in-place pile of the present invention, the FRP reinforcement cage can be placed in a preset foundation pit, and a number of anchor rods are extended into the bottom of the preset foundation pit through the anchor heads. Then, concrete is poured into the preset foundation pit to form a pile body. After the pile body solidifies, the bored cast-in-place pile is formed.

[0051] The bored cast-in-place pile based on FRP bars proposed in the utility model is characterized by embedding a counterweight cage at the lower end of the FRP bar cage body and connecting the first stirrup to the bottom of the FRP bar cage body, so that a plurality of anchor rods evenly distributed at the lower end of the first stirrup can extend into and penetrate the bottom of the preset foundation pit when the FRP bar cage body is placed in the preset foundation pit, thereby reinforcing the FRP bar cage.

[0052] Furthermore, by making the FRP cage out of fiber-reinforced composite materials, the rate at which the FRP cage rusts in offshore or marine environments, salt crystallization environments, and chemical corrosion environments can be effectively reduced, and the bearing capacity of the bored piles can be guaranteed, thereby extending the service life of the bored piles.

[0053] Therefore, compared with the existing bored cast-in-place piles, the bored cast-in-place piles of the present invention use a counterweight cage to increase the weight of the lower end of the FRP reinforcement cage body to move the center of gravity of the FRP reinforcement cage downward, thereby improving the stability of the FRP reinforcement cage during concrete pouring and effectively preventing it from shifting. In combination with the setting of several anchor rods, the FRP reinforcement cage can be better connected to the preset foundation pit, thereby ensuring the balance of the FRP reinforcement cage, thereby improving the stability and safety of the bored cast-in-place piles.

[0054] Although one or more embodiments of the present invention have been described above, it should be understood by those skilled in the art that the present invention can be implemented in any other form without departing from its spirit and scope. Therefore, the embodiments described above are illustrative and not restrictive, and many modifications and substitutions will be apparent to those skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A bored pile based on FRP bars, characterized in that: Formed in a pre-set foundation pit in a designated area; The bored pile comprises a pile body and an FRP reinforcement cage arranged in the pile body; The FRP cage includes an FRP cage body, a counterweight cage and a first annular stirrup, wherein the counterweight cage is embedded in the lower end of the FRP cage body, the first stirrup is connected to the bottom of the FRP cage body, and a plurality of anchor rods are evenly distributed at the lower end thereof; When the FRP cage body is placed in the preset foundation pit, a plurality of anchor rods extend into and penetrate the bottom of the preset foundation pit to reinforce the FRP cage body.

2. The bored pile based on FRP bars according to claim 1, characterized in that: Each of the anchor rods includes a supporting rib and a triangular anchor head, and the anchor head is connected to the first stirrup through the supporting rib.

3. The bored pile based on FRP bars according to claim 2, characterized in that: The counterweight cage includes a second stirrup layer and a first longitudinal reinforcement layer. The first longitudinal reinforcement layer includes a plurality of first longitudinal reinforcements uniformly distributed on the outer wall of the second stirrup layer along the circumference of the second stirrup layer.

4. The bored pile based on FRP bars according to claim 3, characterized in that: The second stirrup layer includes a plurality of second stirrups equidistantly distributed along the extending direction of the plurality of first longitudinal bars.

5. The bored pile based on FRP bars according to claim 4, characterized in that: The FRP cage body includes a third stirrup layer, a second longitudinal reinforcement layer and a spiral reinforcement layer arranged in sequence from the inside to the outside, and the second longitudinal reinforcement layer includes a plurality of second longitudinal reinforcements uniformly distributed along the circumference of the third stirrup layer.

6. The bored pile based on FRP bars according to claim 5, characterized in that: The third stirrup layer includes a plurality of third stirrups equidistantly distributed along the extending direction of the plurality of second longitudinal bars.

7. The bored pile based on FRP bars according to claim 6, characterized in that: The spiral reinforcement layer is formed by a plurality of FRP reinforcements spirally wound around a plurality of the second longitudinal reinforcements.

8. The bored pile based on FRP bars according to claim 7, characterized in that: The first stirrups, the plurality of the second stirrups and the plurality of the third stirrups are all annular structures made of fiber-reinforced composite materials.

9. The bored pile based on FRP bars according to claim 8, characterized in that: The supporting ribs, the first longitudinal ribs and the second longitudinal ribs are all columnar structures made of fiber-reinforced composite materials.

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