CN217810963U

CN217810963U - Composite pile with built-in precast tubular pile

Info

Publication number: CN217810963U
Application number: CN202221642167.4U
Authority: CN
Inventors: 赵世范; 金光男; 赵越; 金成彬; 张喜才; 刘扬; 李宗雷; 王浩; 陈启龙; 刘守进
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-06-29
Filing date: 2022-06-29
Publication date: 2022-11-15
Anticipated expiration: 2032-06-29

Abstract

The utility model relates to a composite pile of built-in precast tubular pile. Comprises a composite pile bottom section and a composite pile body section; the composite pile body section comprises a precast tubular pile and a slurry pile wrapped on the periphery of the precast tubular pile; the upper end of the bottom section of the composite pile is fixedly connected with the lower end of the slurry pile into a whole; the lower end of the prefabricated pipe pile is implanted into the bottom section of the composite pile. The depth of the lower end of the precast tubular pile implanted into the bottom section of the composite pile is less than the length of the bottom section of the composite pile. The utility model provides a compound stake of built-in precast tubular pile has core stake pile bottom composite reinforcement intensity height, with low costs, becomes that stake quality controllability is strong, becomes advantages such as stake construction work efficiency is high, stake bearing capacity is better.

Description

Composite pile with built-in precast tubular pile

Technical Field

The utility model relates to a building pile field, specificly relate to a built-in precast tubular pile's composite pile.

Background

In the construction of pile foundations, composite piles taking prefabricated pipe piles as core piles have a large market share, such as reinforced piles and cement-soil composite pipe piles, the composite piles have the advantages that the bearing capacity of the piles is improved by increasing the surface area of the pile body of the composite pile, the pile length of the prefabricated pipe piles is effectively shortened, and quality defects caused by low strength of interfaces between pile ends of the prefabricated pipe piles are reduced. However, in engineering applications, there are certain disadvantages: 1) Because the outer surface of the precast tubular pile is not firmly combined with the surrounding reinforced soil, the stress damage interface of the composite pile occurs on the outer surface of the precast tubular pile, so that the precast tubular pile is pressed through and cannot meet the design bearing capacity requirement; 2) The peripheral pile of the composite pile is a cement soil mixing pile or a powder spraying pile, and in the original pile soil reinforcing process, the construction efficiency is low, the influence of geological conditions and artificial factors is large, and the bearing capacity is not improved favorably.

Disclosure of Invention

To the technical problem who exists, the utility model provides a built-in precast tubular pile's composite pile. The method has the advantages of high composite reinforcement strength of the bottom end of the core pile, low cost, strong controllability of pile forming quality, high pile forming construction efficiency, better pile bearing capacity and the like.

The utility model adopts the technical proposal that: a composite pile with a built-in precast tubular pile comprises a composite pile bottom section and a composite pile body section; the composite pile body section comprises a precast tubular pile and a slurry pile wrapped on the periphery of the precast tubular pile; the upper end of the bottom section of the composite pile is fixedly connected with the lower end of the slurry pile into a whole; the lower end of the precast tubular pile is implanted into the bottom section of the composite pile.

Furthermore, according to the composite pile with the built-in precast tubular pile, the depth of the lower end of the precast tubular pile implanted into the bottom section of the composite pile is smaller than the length of the bottom section of the composite pile.

Further, foretell composite pile of built-in precast tubular pile, the biggest external diameter of establishing precast tubular pile is D, and the external diameter of thick liquid stake is D1, and the length of composite pile base section is H, and the degree of depth that composite pile base section was implanted to precast tubular pile's lower extreme is H, then has: D1-D is more than or equal to 20mm and less than or equal to 300mm, H is more than or equal to D and less than 0.5H, and H is more than or equal to 3d and less than or equal to H.

Furthermore, the maximum outer diameter D of the bottom section of the composite pile is larger than the outer diameter D1 of the grout pile.

Further, foretell composite pile of built-in precast tubular pile, the precast tubular pile is equal footpath precast concrete tubular pile, bamboo-shaped precast concrete tubular pile or precast steel pile.

Furthermore, the composite pile with the built-in precast tubular pile comprises at least one section of diameter expansion pile, wherein the diameter expansion pile is arranged on the body section of the composite pile, and the diameter expansion pile and the slurry pile are fixedly connected into a whole.

Furthermore, in the composite pile with the built-in precast tubular pile, the maximum outer diameter D of the bottom section of the composite pile is greater than or equal to the maximum outer diameter D2 of the enlarged diameter pile.

Further, foretell composite pile of built-in precast tubular pile, composite pile body section includes screw thread pulp stake, screw thread pulp stake setting is in the thick liquid stake outer fringe and is made an organic whole structure with the thick liquid stake.

Furthermore, the composite pile with the built-in precast tubular pile comprises at least one section of enlarged-diameter pile, wherein the enlarged-diameter pile is arranged on the body section of the composite pile, and the enlarged-diameter pile and the grout pile are fixedly connected into a whole.

Furthermore, in the composite pile with the built-in precast tubular pile, the maximum outer diameter D of the bottom section of the composite pile is larger than or equal to the maximum outer diameter D2 of the enlarged diameter pile.

The beneficial effects of the utility model are that:

1. the utility model discloses built-in precast tubular pile composite pile, composite pile bulk strength is high. The composite pile bottom section is a mixture of concrete and soil, the strength is high, the concrete content of the core part is high, the strength is higher, the bottom of the concentric precast tubular pile is implanted into the composite pile bottom section for a certain depth, the combination is firm and not easy to press through, and the combination strength of the grout pile and the outer surface of the precast concrete tubular pile or the precast steel pile is good.

2. The utility model discloses built-in precast tubular pile composite pile, composite pile bearing capacity is high. The composite pile has large sectional area at the bottom section and good end resistance, and the slurry pile of the composite pile body section has large binding force with surrounding soil due to good permeability of cement slurry or mortar, particularly the slurry pile is in a threaded shape or a column shape with enlarged diameter, and the pile body side resistance of the composite pile is higher.

3. The utility model discloses built-in precast tubular pile composite pile, energy saving and emission reduction are effectual. The composite pile bottom section is a mixture formed by extruding and stirring soil generated by construction expanding and retained in the expanding hole cavity and pressure-poured concrete, reduces the discharge of residual soil of a pile-forming hole, and solves the problems of residual soil discharge and residual soil retention of the pile bottom in the expanding construction.

4. The utility model discloses built-in precast tubular pile composite pile, composite pile adaptation stratum is wide. The composite pile bottom section and the grout pile are formed by cast-in-place pouring, and are completed by matching spiral drilling construction equipment with a concrete press-pouring device and a cement paste or mortar pouring device, and the spiral drilling can be adapted to geological conditions to construct the composite pile.

5. The utility model discloses built-in precast tubular pile composite pile, it is high to become stake construction work efficiency. Compared with the existing composite piles such as stiffness piles and cement-soil composite pipe piles, the pile forming efficiency is high, and the cost is low.

6. The utility model discloses built-in precast tubular pile composite pile is the composite pile of piling bar to precast tubular pile, and the corrosion resisting property of piling bar is good. The outer surface of the steel pile is wrapped by the slurry pile and the composite pile bottom, so that the corrosion of soil around the pile to the steel pile is avoided.

Drawings

Fig. 1 is the utility model discloses embodiment 1 embeds the structural schematic diagram of precast tubular pile composite pile.

Fig. 2 is the utility model discloses embodiment 2 embeds the structural schematic of precast tubular pile composite pile.

Fig. 3 is the utility model discloses embodiment 3 embeds the structural schematic of precast tubular pile composite pile.

Detailed Description

Example 1

As shown in fig. 1, a composite pile with a built-in precast tubular pile is composed of a composite pile bottom section 10 and a composite pile body section 20.

The composite pile bottom section 10 is a pile bottom composed of a mixture of concrete and soil.

The composite pile body section 20 is composed of a precast tubular pile 21, a straight cylindrical grout pile 22 and an enlarged diameter pile 23, wherein the periphery of the precast tubular pile 21 is wrapped by the straight cylindrical grout pile 22.

The upper end of the composite pile bottom section 10 is integrally fixed with the lower end of the slurry pile 22.

The precast tubular pile 21 and the pulp pile 22 are consolidated into a whole. The grout pile 22 and the enlarged diameter pile 23 are both concretions of grout or mortar.

The precast tubular pile 21 may be a precast concrete tubular pile 211, a bamboo-shaped precast concrete tubular pile 212, or a precast steel pile 213 with equal diameter. As an example, the present embodiment employs the precast concrete pipe piles 211 of equal diameters. The lower end of the precast concrete pipe pile 211 is implanted into the composite pile bottom section 10. Preferably, the lower end of the precast concrete tubular pile 211 is embedded into the bottom section 10 of the composite pile to a certain depth, that is, the embedded depth is less than the length of the bottom section 10 of the composite pile.

The composite pile body section 20 is provided with at least one section of enlarged diameter pile 23. As an example, the present embodiment provides 2 sections of enlarged diameter piles 23, the enlarged diameter piles 23 are provided on the composite pile body section 20, and the enlarged diameter piles 23 are integrally consolidated with the grout piles 22.

Setting the maximum outer diameter of the precast concrete tubular pile 211 as D, the outer diameter of the straight cylindrical grout pile 22 as D1, the outer diameter of the enlarged diameter pile 23 as D2, the maximum outer diameter of the composite pile bottom section 10 as D, the length of the composite pile bottom section 10 as H, and the depth of the lower end of the precast concrete tubular pile 211 implanted into the composite pile bottom section 10 as H; then there are: D1-D is more than or equal to 20mm and less than or equal to 300mm, D1 is more than or equal to D2, D2 is more than or equal to D, D is more than or equal to H and less than 0.5H, and 3d is more than or equal to H.

Example 2

As shown in fig. 2, a composite pile with a built-in precast tubular pile is composed of a composite pile bottom section 10 and a composite pile body section 20.

The composite pile body section 20 is composed of a precast tubular pile 21, a straight cylindrical grout pile 22 and a threaded grout pile 24, wherein the periphery of the precast tubular pile 21 is wrapped by the straight cylindrical grout pile 22 and the threaded grout pile 24.

The upper end of the composite pile bottom section 10 is fixedly connected with the lower end of the cylindrical slurry pile 22 into a whole.

The precast tubular pile 21 and the grout pile 22 are consolidated into a whole. The grout pile 22 and the screw-threaded grout pile 24 are both concretions of grout or mortar.

The precast tubular pile 21 may be a precast concrete tubular pile 211, a bamboo-shaped precast concrete tubular pile 212, or a precast steel pile 213 with equal diameter. As an example, the present embodiment employs a bamboo-like precast concrete pipe pile 212. The lower end of the bamboo-shaped precast concrete pipe pile 212 is implanted into the composite pile bottom section 10. Preferably, the lower end of the bamboo-shaped precast concrete pipe pile 212 is embedded into the composite pile bottom section 10 to a certain depth, that is, the embedding depth is smaller than the length of the composite pile bottom section 10.

The threaded grout pile 24 is disposed outside the grout pile 22 and is formed as an integral structure with the grout pile 22. The screw-threaded pulp pile 24 may be provided on the outer side of the pulp pile 22 over the entire length thereof or the screw-threaded pulp pile 24 may be provided on a part of the length thereof. As an example, in this embodiment, a threaded grout pile 24 is provided over the entire length of the outside of the grout pile 22.

Setting the maximum outer diameter of the bamboo-shaped precast concrete pipe pile 212 as D, the outer diameter of the straight cylindrical grout pile 22 as D1, the maximum outer diameter of the threaded grout pile 24 as D3, the maximum outer diameter of the composite pile bottom section 10 as D, the length of the composite pile bottom section 10 as H, and the depth of the lower end of the bamboo-shaped precast concrete pipe pile 212 embedded into the composite pile bottom section 10 as H; then there are: D1-D is more than or equal to 20mm and less than or equal to 300mm, D1 is more than D3, D3 is more than D, H is more than or equal to D and less than 0.5H, and H is more than or equal to 3d and less than or equal to H.

Example 3

As shown in fig. 3, a composite pile with a built-in precast tubular pile is composed of a composite pile bottom section 10 and a composite pile body section 20.

The composite pile body section 20 is composed of a precast tubular pile 21, a straight cylindrical grout pile 22, an enlarged diameter pile 23 and a threaded grout pile 24, wherein the periphery of the precast tubular pile 21 is wrapped by the straight cylindrical grout pile 22, and the enlarged diameter pile 23 is wrapped by the threaded grout pile 24.

The precast tubular pile 21 and the grout pile 22 are consolidated into a whole. The grout pile 22, the enlarged diameter pile 23, and the screw-threaded grout pile 24 are all concretions of grout or mortar.

The precast tubular pile 21 may be a precast concrete tubular pile 211, a bamboo-shaped precast concrete tubular pile 212, or a precast steel pile 213 with equal diameter. As an example, the present embodiment employs a prefabricated steel pile 213. The lower end of the prefabricated steel pile 213 is embedded into the bottom section 10 of the composite pile to a certain depth, that is, the embedded depth is less than the length of the bottom section 10 of the composite pile.

The composite pile body section 20 is provided with at least one section of enlarged diameter pile 23. As an example, in the present embodiment, a section of enlarged diameter pile 23 is provided, the enlarged diameter pile 23 is provided in the middle upper part of the composite pile body section 20, and the enlarged diameter pile 23 is integrally consolidated with the grout pile 22.

The threaded grout post 24 is disposed outside the grout post 22 and is formed as a unitary structure with the grout post 22. The screw-threaded pulp stake 24 may be provided along the entire length of the outer edge of the pulp stake 22 or the screw-threaded pulp stake 24 may be provided along a portion of the length thereof. As an example, in the present embodiment, a screw-threaded pulp pile 24 is provided in the range of the length of the outer portion of the pulp pile 22, i.e., the lower end portion.

Setting the maximum outer diameter of the prefabricated steel pile 213 as D, the outer diameter of the straight cylindrical grout pile 22 as D1, the outer diameter of the enlarged diameter pile section 23 as D2, the outer diameter of the threaded grout pile 24 as D3, the maximum outer diameter of the composite pile bottom section 10 as D, the length of the composite pile bottom section 10 as H, and the depth of the lower end of the prefabricated steel pile 213 implanted into the composite pile bottom section 10 as H; then there are: D1-D is not less than 20mm and not more than 300mm, D2 is more than D1, D3 is more than D1, D is more than D3, D is not less than D2,0.5H is more than H is not less than D, and H is not less than 3D.

Claims

1. A composite pile with a built-in precast tubular pile is characterized by comprising a composite pile bottom section (10) and a composite pile body section (20); the composite pile body section (20) comprises a precast tubular pile (21) and a slurry pile (22) wrapped on the periphery of the precast tubular pile (21); the upper end of the composite pile bottom section (10) is fixedly connected with the lower end of the slurry pile (22) into a whole; the lower end of the precast tubular pile (21) is implanted into the composite pile bottom section (10).

2. The composite pile with the built-in precast tubular pile according to claim 1, wherein the lower end of the precast tubular pile (21) is implanted into the composite pile bottom section (10) to a depth less than the length of the composite pile bottom section (10).

3. The composite pile with the built-in precast tubular pile according to claim 2, wherein if the maximum outer diameter of the precast tubular pile (21) is D, the outer diameter of the grout pile (22) is D1, the length of the composite pile bottom section (10) is H, and the depth of the lower end of the precast tubular pile (21) implanted into the composite pile bottom section (10) is H, then: D1-D is more than or equal to 20mm and less than or equal to 300mm, H is more than or equal to D and less than 0.5H, and H is more than or equal to 3d and less than or equal to H.

4. The composite pile with the built-in precast tubular pile according to claim 1, wherein the maximum outer diameter D of the composite pile bottom section (10) is larger than the outer diameter D1 of the grout pile (22).

5. The composite pile with the built-in precast tubular pile according to claim 1, wherein the precast tubular pile (21) is a precast concrete tubular pile (211), a bamboo-shaped precast concrete tubular pile (212) or a precast steel pile (213) with equal diameter.

6. The composite pile with the built-in precast tubular pile according to any one of claims 1 to 5, characterized by comprising at least one section of enlarged diameter pile (23), wherein the enlarged diameter pile (23) is arranged on the composite pile body section (20), and the enlarged diameter pile (23) is consolidated with the grout pile (22) into a whole.

7. The composite pile with the built-in precast tubular pile according to claim 6, characterized in that the maximum outer diameter D of the composite pile bottom section (10) is greater than or equal to the maximum outer diameter D2 of the enlarged diameter pile (23).

8. The composite pile for the built-in precast tubular pile according to any one of claims 1 to 5, wherein the composite pile body section (20) comprises a screw-threaded grout pile (24), and the screw-threaded grout pile (24) is arranged at the outer edge of the grout pile (22) and is made into an integral structure with the grout pile (22).

9. The composite pile with the built-in precast tubular pile according to claim 8, characterized by comprising at least one section of enlarged diameter pile (23), wherein the enlarged diameter pile (23) is arranged on the composite pile body section (20), and the enlarged diameter pile (23) is integrated with the grout pile (22).

10. The composite pile with the built-in precast tubular pile according to claim 9, characterized in that the maximum outer diameter D of the composite pile bottom section (10) is greater than or equal to the maximum outer diameter D2 of the enlarged diameter pile (23).