A composite pile foundation structure based on cement mixing pile and prefabricated pipe pile

Abstract

The utility model relates to a kind of composite pile foundation structure based on cement mixing pile sleeve hits prefabricated pipe pile, including cement mixing pile, prefabricated pipe pile, pile top structure, prefabricated pipe pile outer wall is equipped with spiral projection, inner wall is equipped with several staggered vertical ribs from top to bottom, and prefabricated pipe pile is rotated into cement mixing pile and is realized occlusion compact by spiral projection and vertical rib, prefabricated pipe pile top projects cement mixing pile, and pile top structure is cast in prefabricated pipe pile and cement mixing pile top, and the reinforcement cage reserved in cement mixing pile top extends into pile top structure.The utility model rotates prefabricated pipe pile into cement mixing pile, utilizes spiral projection and vertical rib to realize the compact occlusion between two, to improve the overall stability and bearing capacity of pile foundation.

Description

Technical Field

[0001] This utility model relates to the field of pile foundation engineering technology, and in particular to a composite pile foundation structure based on cement mixing piles with precast pipe piles driven in place. Background Technology

[0002] In construction engineering, pile foundations are a crucial component of the supporting structure, and their stability and bearing capacity are vital to the safety of the entire project. Traditional pile foundation structures, such as individual precast pipe piles or cement-mixed piles, can meet engineering requirements to some extent, but each has its limitations. For example, precast pipe piles may experience significant settlement in soft soil foundations, while cement-mixed piles, although able to improve the properties of the foundation soil, have limited bearing capacity on their own. Therefore, a new type of composite pile foundation structure combining the advantages of both is needed to improve the overall performance of pile foundations and meet the construction requirements under complex geological conditions. Summary of the Invention

[0003] This utility model aims to address the shortcomings of existing technologies by providing a composite pile foundation structure based on cement mixing piles with precast pipe piles.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a composite pile foundation structure based on cement mixing piles and precast pipe piles, comprising cement mixing piles, precast pipe piles, and a pile top structure. The outer wall of the precast pipe pile is provided with spiral protrusions, and the inner wall is provided with several staggered vertical ribs from top to bottom. The precast pipe pile is screwed into the cement mixing pile and the spiral protrusions and vertical ribs achieve a tight fit. The top of the precast pipe pile protrudes from the cement mixing pile. The pile top structure is cast on the top of the precast pipe pile and the cement mixing pile, and the steel cage reserved at the top of the cement mixing pile extends into the pile top structure.

[0005] Specifically, the precast pipe piles have bolts pre-embedded at the top that extend through the pile top structure.

[0006] In particular, the vertical cross-section of the spiral protrusion is trapezoidal, and it has an arc transition on the side away from the precast pipe pile.

[0007] In particular, the vertical ribs have a semi-circular cross-section.

[0008] The beneficial effects of this utility model are as follows: By tightly interlocking the spiral protrusions on the outer wall and the vertical ribs on the inner wall of the precast pipe pile with the cement mixing pile, the bearing capacity of the pile foundation is significantly improved, enabling it to better withstand the loads of the superstructure. The pile top structure is cast on top of the precast pipe pile and the cement mixing pile, and the steel reinforcement cage pre-installed at the top of the cement mixing pile extends into the pile top structure, enhancing the bearing capacity of the pile top and allowing for better connection with the superstructure. The bolts pre-embedded at the top of the precast pipe pile facilitate connection with the superstructure, improving the reliability and safety of the connection. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model;

[0010] Figure 2 This is a top view of the cement mixing pile and precast pipe pile of this utility model.

[0011] In the diagram: 1-Cement mixing pile; 11-Reinforcing cage; 2-Precast pipe pile; 21-Spiral protrusion; 22-Vertical rib; 23-Bolt; 3-Pile top structure;

[0012] The following will describe in detail the embodiments of this utility model with reference to the accompanying drawings. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0014] like Figures 1-2 As shown, a composite pile foundation structure based on cement mixing piles and precast pipe piles includes cement mixing piles 1, precast pipe piles 2, and pile top structure 3. The outer wall of the precast pipe pile 2 is provided with spiral protrusions 21, and the inner wall is provided with several staggered vertical ribs 22 from top to bottom. The precast pipe pile 2 is screwed into the cement mixing pile 1 and is tightly engaged through the spiral protrusions 21 and the vertical ribs 22. The vertical cross section of the spiral protrusions 21 is trapezoidal and has an arc transition on the side away from the precast pipe pile 2. The horizontal cross section of the vertical ribs 22 is semi-circular.

[0015] The tight interlocking of the spiral protrusions 21 on the outer wall and the vertical ribs 22 on the inner wall of the precast pipe pile 2 with the cement mixing pile 1 significantly improves the bearing capacity of the pile foundation, enabling it to better withstand the loads of the superstructure. The design of the trapezoidal vertical cross-section of the spiral protrusions 21 with an arc transition away from the precast pipe pile 2, and the semi-circular transverse cross-section of the vertical ribs 22, optimize the mechanical properties of the structure, reduce stress concentration, and improve the durability of the pile foundation.

[0016] The top of the precast pipe pile 2 protrudes from the cement mixing pile 1. The pile top structure 3 is poured on the top of the precast pipe pile 2 and the cement mixing pile 1. The steel cage 11 reserved on the top of the cement mixing pile 1 extends into the pile top structure 3. The top of the precast pipe pile 2 is pre-embedded with bolts 23 that pass through the pile top structure 3.

[0017] The design of the precast pipe pile 2 protruding from the cement mixing pile 1, and the pouring of the pile top structure 3, enhance the overall stability of the pile foundation and reduce the deviation and tilting of the pile body during construction and use. The pile top structure 3 is poured on top of the precast pipe pile 2 and the cement mixing pile 1, and the steel cage 11 reserved at the top of the cement mixing pile 1 extends into the pile top structure 23, which enhances the bearing capacity of the pile top and enables it to be better connected to the superstructure.

[0018] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", 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 are not intended to 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.

[0019] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0020] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made using the inventive concept and technical solution of the present invention, or direct application to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A composite pile foundation structure based on cement mixing piles and precast pipe piles, comprising cement mixing piles (1), precast pipe piles (2), and a pile top structure (3), characterized in that, The precast pipe pile (2) has a spiral protrusion (21) on its outer wall and several intersecting vertical ribs (22) on its inner wall from top to bottom. The precast pipe pile (2) is screwed into the cement mixing pile (1) and the spiral protrusion (21) and vertical ribs (22) achieve a tight fit. The top of the precast pipe pile (2) protrudes from the cement mixing pile (1). The pile top structure (3) is poured on the top of the precast pipe pile (2) and the cement mixing pile (1). The steel cage (11) reserved at the top of the cement mixing pile (1) extends into the pile top structure (3).

2. The composite pile foundation structure based on cement mixing piles and precast pipe piles according to claim 1, characterized in that, The top of the precast pipe pile (2) is pre-embedded with bolts (23) that pass through the pile top structure (3).

3. A composite pile foundation structure based on cement mixing piles and precast pipe piles according to claim 1, characterized in that, The vertical cross section of the spiral protrusion (21) is trapezoidal, and it transitions in an arc shape away from the precast pipe pile (2) on one side.

4. A composite pile foundation structure based on cement mixing piles and precast pipe piles as described in claim 1, characterized in that, The vertical rib (22) has a semi-circular cross section.

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