A bite prestressed support pile structure

Abstract

The utility model provides a kind of occlusion prestressed support pile structure, including front row stake group, rear row stake group;Front row stake group includes multiple concrete elementary stake and prestressed meat stake of alternative occlusion, and prestressed meat stake is embedded with reinforcement cage, and reinforcement cage includes multiple longitudinal prestressed reinforcement and spiral stirrup on longitudinal prestressed reinforcement;Rear row stake group includes multiple one-word prestressed precast pile and T-shaped prestressed precast pile of alternative occlusion;The wing plate both ends of T-shaped prestressed precast pile are buckled with one-word prestressed precast pile, and the web of T-shaped prestressed precast pile is connected with prestressed meat stake pouring;One-word prestressed precast pile and T-shaped prestressed precast pile are provided with prestressed reinforcement by tensioning method inside.The occlusion prestressed support pile structure of the utility model is in the way of collaborative stress of double-row pile body, improves lateral stiffness, bending shear capacity, significantly improves the integrity, stability of support system.

Description

Technical Field

[0001] This utility model belongs to the field of foundation pit support engineering technology, and in particular relates to an interlocking prestressed support pile structure. Background Technology

[0002] Traditional interlocking pile support structures typically consist of interlocking reinforced concrete piles (precast piles) and unreinforced plain concrete piles (plain piles) arranged at intervals to form a continuous retaining wall and water-stopping curtain. The plain piles are constructed first; after two adjacent plain piles are completed, drilling is performed on the precast piles. During drilling, the plain piles are cut, and after pouring the precast pile concrete, the plain piles and precast piles form an interlocking area. This method suffers from insufficient lateral stiffness, low shear strength, susceptibility to deformation in deep foundation pits, poor coordination between precast and cast-in-place piles, and insufficient overall stability. Utility Model Content

[0003] In view of this, in order to solve the above-mentioned technical problems, this utility model proposes an interlocking prestressed support pile structure with reasonable structural design, which effectively improves the lateral stiffness, bending and shear resistance, and significantly enhances the integrity and stability of the support system by using a double-row pile body to cooperate in bearing the force.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0005] An interlocking prestressed retaining pile structure, comprising:

[0006] The front row of piles includes multiple interlocking plain concrete piles and prestressed concrete piles. The prestressed concrete piles are embedded with steel cages, which include multiple longitudinal prestressed steel bars and spiral stirrups wrapped around the longitudinal prestressed steel bars.

[0007] The rear pile group includes multiple alternating interlocking straight-line prestressed precast piles and T-shaped prestressed precast piles; the two ends of the flanges of the T-shaped prestressed precast piles are connected to the straight-line prestressed precast piles, and the webs of the T-shaped prestressed precast piles are cast and connected to the prestressed precast piles; the straight-line prestressed precast piles and the T-shaped prestressed precast piles are provided with pre-tensioned prestressed steel bars.

[0008] The front row of piles consists of alternating interlocking plain concrete piles and prestressed concrete piles. Longitudinal prestressed steel bars provide high axial prestress, improving bending and shear resistance. Spiral stirrups confine the core concrete, enhancing ductility. The rear row of piles consists of alternating interlocking straight-line prestressed precast piles and T-shaped prestressed precast piles, all prefabricated in the factory. Cast-in-place piles and precast piles are constructed in parallel, shortening on-site construction time and improving installation efficiency. The flanges of the T-shaped prestressed precast piles are interlocked with the straight-line prestressed precast piles, forming a continuous load-bearing system and ensuring the integrity of the rear pile group. The T-shaped prestressed precast piles provide additional bending and shear resistance sections. The webs of the T-shaped prestressed precast piles are cast and connected to the prestressed concrete piles, achieving an integrated load-bearing system and facilitating force transfer. The double-row piles form a frame structure, improving the overall integrity and bending stiffness of the support system.

[0009] Furthermore, trapezoidal tenons are provided on both sides of the prestressed pile and the concrete pile where they interlock, and trapezoidal grooves are provided on both sides of the concrete pile to match the trapezoidal tenons.

[0010] The trapezoidal tenon and trapezoidal groove design can generate a wedge-tightening effect on the trapezoidal slope to resist horizontal shear force.

[0011] Furthermore, multiple longitudinal prestressed steel bars are embedded within the trapezoidal tenon.

[0012] Furthermore, one end of the straight-shaped prestressed precast pile and one end of the wing plate of the T-shaped prestressed precast pile are provided with insertion grooves, and one end of the straight-shaped prestressed precast pile and the other end of the wing plate of the T-shaped prestressed precast pile are provided with insertion tenons that are adapted to the insertion grooves.

[0013] Furthermore, the insertion groove is provided with a waterproof coating, and the insertion tenon is provided with a longitudinal water-stopping seal.

[0014] Furthermore, the end plate of the prestressed pile with anchorage is connected to the end plate of the T-shaped prestressed precast pile with anchorage by welding or by fixing with steel plates and bolts, and the connection is provided with an anti-corrosion and waterproof coating.

[0015] Compared with existing technologies, the interlocking prestressed support pile structure of this utility model has the following advantages:

[0016] (1) The interlocking prestressed support pile structure of this utility model forms a multi-directional interlocking overall support system through the interlocking of the front row of plain concrete piles and prestressed piles, and the interlocking of the rear row of I-shaped prestressed precast piles and T-shaped prestressed precast piles, and then through the connection of the web of the T-shaped prestressed precast piles and the prestressed piles. This significantly improves the collaborative working ability of the structure under horizontal load, reduces the slippage and deformation between piles, effectively improves the lateral stiffness and bending and shear resistance, and significantly enhances the integrity and stability of the support system.

[0017] (2) In the interlocking prestressed support pile structure described in this utility model, longitudinal prestressed steel bars and spiral stirrups are configured inside the prestressed piles. The T-shaped prestressed precast piles and the I-shaped prestressed precast piles adopt pre-tensioned prestressed steel bars. The front and rear rows of piles are connected by cast-in-place concrete and end plates to form a combined stress mode of "precast + cast-in-place", which effectively improves the bending and shear bearing capacity and is suitable for deep and large foundation pits or complex geological conditions.

[0018] (3) In the interlocking prestressed support pile structure described in this utility model, the straight-line prestressed precast piles and the T-shaped prestressed piles are prefabricated in the factory. The cast-in-place piles and precast piles can be constructed in parallel, which shortens the on-site construction time and improves the installation efficiency. Attached Figure Description

[0019] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0020] Figure 1 This is a schematic diagram of the internal structure of the interlocking prestressed support pile structure described in Embodiment 1 of this utility model;

[0021] Figure 2 This is a schematic diagram of the interlocking prestressed support pile structure described in Embodiment 1 of this utility model;

[0022] Figure 3 This is a schematic diagram of the internal structure of the interlocking prestressed support pile structure described in Embodiment 2 of this utility model;

[0023] Figure 4 This is a schematic diagram of the interlocking prestressed support pile structure described in Embodiment 2 of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1-Front row of piles, 2-Rear row of piles, 3-Plain concrete piles, 4-Prestressed concrete piles, 5-Longitudinal prestressed steel bars, 6-Spiral stirrups, 7-Straight-line prestressed precast piles, 8-T-shaped prestressed precast piles, 9-Pre-tensioned prestressed steel bars, 10-Interlocking groove, 11-Interlocking tenon, 12-Anchorage, 13-End plate, 14-Trapezoidal tenon, 15-Trapezoidal groove. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0027] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] Example 1

[0031] like Figure 1 and 2 As shown, an interlocking prestressed support pile structure includes a front pile group 1 and a rear pile group 2.

[0032] The front row of pile group 1 includes multiple interlocking concrete plain piles 3 and prestressed concrete piles 4; the prestressed concrete piles 4 are equipped with steel cages, which include multiple longitudinal prestressed steel bars 5 and spiral stirrups 6 wrapped around the longitudinal prestressed steel bars 5.

[0033] The rear pile group 2 includes multiple alternating interlocking straight prestressed precast piles 7 and T-shaped prestressed precast piles 8; the straight prestressed precast piles 7 and T-shaped prestressed precast piles 8 are equipped with pre-tensioned prestressed steel bars 9; one end of the straight prestressed precast pile 7 and one end of the wing plate of the T-shaped prestressed precast pile 8 are provided with insertion grooves 10, and one end of the straight prestressed precast pile 7 and the other end of the wing plate of the T-shaped prestressed precast pile 8 are provided with insertion tenons 11 that are adapted to the insertion grooves 10; the insertion grooves 10 are provided with a waterproof coating, and the insertion tenons 11 are provided with longitudinal water-stopping seals; the wing plates of the T-shaped prestressed precast pile 8 and both ends of the straight prestressed precast pile 7 are fastened together by the insertion grooves 10 and the insertion tenons 11.

[0034] The web of the T-shaped prestressed precast pile 8 is cast and connected to the prestressed pile 4; the end plate 13 of the prestressed pile 4 with anchor 12 is connected to the end plate 13 of the T-shaped prestressed precast pile 8 with anchor 12 by welding or fixing with steel plate and bolts, and the connection is provided with anti-corrosion and waterproof coating.

[0035] Example 2

[0036] like Figure 3 and 4 As shown, based on Example 1, the difference from Example 1 is that trapezoidal tenons 14 are provided on both sides of the engagement between the prestressed pile 4 and the concrete pile 3, and trapezoidal grooves 15 adapted to the trapezoidal tenons 14 are provided on both sides of the concrete pile 3; multiple longitudinal prestressed steel bars 5 are embedded in the trapezoidal tenons 14.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A type of interlocking prestressed support pile structure, characterized in that, include: The front row of piles includes multiple interlocking plain concrete piles and prestressed concrete piles. The prestressed concrete piles are embedded with steel cages, which include multiple longitudinal prestressed steel bars and spiral stirrups wrapped around the longitudinal prestressed steel bars. The rear pile group includes multiple alternating interlocking straight-line prestressed precast piles and T-shaped prestressed precast piles; the two ends of the flanges of the T-shaped prestressed precast piles are connected to the straight-line prestressed precast piles, and the webs of the T-shaped prestressed precast piles are cast and connected to the prestressed precast piles; the straight-line prestressed precast piles and the T-shaped prestressed precast piles are provided with pre-tensioned prestressed steel bars.

2. The interlocking prestressed support pile structure according to claim 1, characterized in that: Both sides of the prestressed pile and the concrete pile are provided with trapezoidal tenons, and the corresponding sides of the concrete pile are provided with trapezoidal grooves that are adapted to the trapezoidal tenons.

3. The interlocking prestressed support pile structure according to claim 2, characterized in that: Multiple longitudinal prestressed steel bars are embedded inside the trapezoidal tenon.

4. The interlocking prestressed support pile structure according to claim 1, characterized in that: One end of the straight-line prestressed precast pile and one end of the wing plate of the T-shaped prestressed precast pile are provided with insertion grooves, and one end of the straight-line prestressed precast pile and the other end of the wing plate of the T-shaped prestressed precast pile are provided with insertion tenons that are adapted to the insertion grooves.

5. The interlocking prestressed support pile structure according to claim 4, characterized in that: The insertion groove is provided with a waterproof coating, and the insertion tenon is provided with a longitudinal water-stopping seal.

6. The interlocking prestressed support pile structure according to any one of claims 1 to 5, characterized in that: The end plate of the prestressed pile with anchorage is connected to the end plate of the T-shaped prestressed precast pile with anchorage by welding or by fixing with steel plate and bolts, and the connection is provided with anti-corrosion and waterproof coating.

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