An assembled integral static pressure pile column

Abstract

This invention discloses a prefabricated monolithic static pressure pile, comprising a pile guiding device, a pile body, a static pressure bearing sleeve, and a pile cap transition layer. The pile guiding device is located at the bottom of the pile body. The pile cap transition layer connects the pile body and the static pressure bearing sleeve. The static pressure bearing sleeve includes an inner column and an outer column, with a concrete grouting space between the inner and outer columns. This invention uses a square pile, prefabricated in a factory, allowing for direct static pressure application of the integrated pile to the appropriate position, saving construction time and labor, reducing construction processes, and increasing the load-bearing capacity of the pile. This invention is applicable to prefabricated monolithic building foundations, prefabricated monolithic vertical underground parking garages, prefabricated monolithic underground spaces, and prefabricated monolithic river dams, among other building structures.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and specifically to an assembled monolithic static pressure pile. Background Technology

[0002] With economic and social development, the demand for high-rise buildings and underground spaces, as well as foundation reinforcement technology, has become a key focus in my country's civil engineering and transportation engineering fields. Precast monolithic static pressure pile reinforcement for foundations and support-free underground engineering is a new technology for building foundation reinforcement and underground space support replacement. Due to the use of precast piles, the integrity of the pile quality is guaranteed. Its process is simple, easy to operate, and fast, achieving the goals of material saving, vibration-free, noise-free, low construction stress, and no environmental pollution. The construction termination pressure can objectively reflect the bearing capacity of the base layer and individual piles in real time, offering advantages such as information-based construction. It is impact-free, the pile top is not easily damaged, pile driving accuracy is high, and the reinforcement effect is significant. It is widely used in the field of foundation reinforcement treatment for artificial fill, soft soil, cohesive soil, silt, silty sand, fine sand, and medium sand.

[0003] Assembled monolithic static pressure piles are classified as displacement piles, exhibiting a significant soil displacement effect. This effect increases the side friction resistance of the pile, thereby increasing the bearing capacity of a single pile. This is particularly beneficial in areas with widespread soft soil, where the foundation may contain a thick layer of compacted sand, making pile driving difficult and preventing the pile tip from reaching the design elevation. This significantly limits the application and widespread use of static pressure piles for foundation reinforcement. Therefore, it is necessary to develop a new pile driving construction technique for static pressure piles that is safe, reliable, easy to construct, and effectively waterproof. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a prefabricated monolithic static pressure pile that is safe, reliable, easy to construct, and effectively reduces the soil squeezing effect during static pressure pile construction, thus minimizing adverse impacts on surrounding buildings and the environment.

[0005] The technical solution adopted in this invention is: an assembled integral static pressure pile, including a pile guiding device, a pile body, a static pressure bearing sleeve column, and a pile cap transition layer; the pile guiding device is set at the bottom of the pile body; the pile cap transition layer connects the pile body and the static pressure bearing sleeve column; the static pressure bearing sleeve column includes an inner column and an outer column, and a concrete grouting space is left between the inner column and the outer column.

[0006] Furthermore, the pile guiding device is a square cone-shaped structure, comprising a steel pile tip and a concrete pile, wherein the pile tip is pre-embedded in the end of the concrete pile; the pile tip and the concrete pile are connected and fixed by pre-embedded steel bars.

[0007] Furthermore, the pile body adopts a rigid load-bearing skeleton made of longitudinal reinforcing bars and transverse stirrups. The skeleton contains longitudinal grouting pipes and diagonal grouting pipe branches, and is formed by pouring concrete through a mold.

[0008] Furthermore, the grouting pipes are arranged in the middle of the four sides of the pile body and are made of seamless high-pressure steel pipes.

[0009] Furthermore, one end of the grouting pipe branch is connected to the grouting pipe, and the other end facing the pile tip is equipped with a pipe sealing hinge.

[0010] Furthermore, the side of the foundation transfer layer has reserved openings for steel reinforcement to pass through.

[0011] Furthermore, the top of the pile body has a pre-drilled socket for connecting the inner column and is connected via a tongue and groove joint, and the reinforcing steel bars inside the inner column are connected to the pile body.

[0012] Furthermore, the outer column is provided with a lower grouting hole and a grout overflow hole.

[0013] Furthermore, the static pressure bearing sleeve column is provided with a pre-reserved groove for the beam plate.

[0014] The beneficial effects of this invention are as follows: This invention uses square, prefabricated piles, which can be directly statically pressed into the corresponding positions, saving construction time and labor, reducing construction processes, and increasing the bearing capacity of the piles. This invention is applicable to prefabricated building foundations, prefabricated vertical underground parking garages, prefabricated underground spaces, and prefabricated river dams, among other building structures. Attached Figure Description

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 yes Figure 1 AA section view in the middle;

[0017] Figure 3 yes Figure 1 BB section view in the middle;

[0018] Figure 4 This is a schematic diagram of the structure reserved for the beam-slab groove;

[0019] In the diagram: 1-Pile guiding device, 101-Pile tip, 102-Reinforcing bar embedded part, 103-Concrete pile, 2-Pile body, 201-Grouting pipe branch line, 202-Grouting pipe, 203-Reinforcing steel bar, 204-Stirrup, 3-Inner column, 4-Outer column, 401-Grouting space, 402-Lower grouting hole, 403-Grouting overflow hole, 5-Beam and slab reserved groove, 6-Reinforcing bar through opening, 7-Tie joint, 8-Pile cap transfer layer. Detailed Implementation

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] like Figure 1 and Figure 3 As shown, this invention is an assembled integral static pressure pile, comprising a pile guiding device 1, a pile body 2, a static pressure bearing sleeve, and a pile cap transition layer 8; the pile guiding device 1 is located at the bottom of the pile body 2; the pile cap transition layer 8 connects the pile body 2 and the static pressure bearing sleeve; the static pressure bearing sleeve includes an inner column 3 and an outer column 4, with the inner column 3 being higher than the outer column 4 for easier interface connection. A concrete grouting space 401 is provided between the inner column 3 and the outer column 4.

[0022] In this invention, the pile guiding device 1 includes a four-sided pyramidal pile tip 101 and a concrete pile 103, which are made of steel plate welded together. The pile tip 101 is anchored to the end of the concrete pile 103 by a steel bar embedded part 102. The maximum width of the cone of the pile guiding device 1 is the same as that of the pile body 2.

[0023] The pile body 2 is constructed using a rigid load-bearing framework consisting of longitudinal reinforcing bars 203 and transverse stirrups 204. Within this framework are longitudinal grouting pipes 202 and diagonal grouting pipe branches 201. After passing concealed inspection, concrete is poured into the pile body using molds. The entire pile body 2 can be fabricated in a factory. Figure 2 As shown, the grouting pipe 202 is arranged in the middle of the four sides of the pile body 2 and is made of seamless high-pressure steel pipe. One end of the grouting pipe branch line 201 is connected to the grouting pipe 202, and the other end facing the pile tip 1 is equipped with a pipeline sealing hinge. When the pile column is statically pressed to the designated position, pressure grouting is applied, and the pressure grout can open the sealing cover to carry out grouting.

[0024] The top of the pile body 2 has a pre-reserved socket for connecting the inner column 3 and a fitting joint, which is connected by the tongue and groove joint 7. The reinforcing steel bars inside the inner column 3 are connected to the pile body 2.

[0025] The side of the transfer layer at the top of pile 2 has a pre-reserved steel bar through-hole 6. When the transfer layer is constructed, the compression steel bar of the pile can pass through the pile body to increase the load of the pile column.

[0026] like Figure 4 As shown, since the outer column 4 is installed outside the inner column 3, after being corrected for verticality, it is filled with grout that is one grade higher than concrete and needs to be filled from bottom to top. Therefore, the outer column 4 has a lower grouting hole 402 and an upper grout overflow hole 403, which are filled into the grouting space 401 until the upper grout overflow hole 403 overflows.

[0027] The static pressure bearing sleeve column, which is composed of inner column 3 and outer column 4, is provided with beam and slab reserved groove 5. During actual construction, the height of the beam and slab reserved groove 5 is determined according to the drawing refinement and design beam and slab thickness. It is used to install the beam and slab at the top of the outer column 4 and to anchor the tensile steel bars in the beam and slab to the inner column 3.

[0028] By applying this invention to prefabricated modular buildings, project quality can be effectively improved and construction time can be significantly reduced. Various modifications or improvements can be made based on prefabricated modular technology in this field, and all such modifications or improvements should fall within the scope of protection claimed by this invention without departing from its overall concept.

Claims

1. A prefabricated integral static pressure pile, characterized in that: It includes a pile guiding device (1), a pile body (2), a static pressure bearing sleeve, and a pile cap transition layer (8); the pile guiding device (1) is located at the bottom of the pile body (2); the pile cap transition layer (8) connects the pile body (2) and the static pressure bearing sleeve. The static pressure bearing sleeve includes an inner column (3) and an outer column (4), and the inner column (3) is higher than the outer column (4) to facilitate the interface of the inner column (3); a concrete grouting space (401) is left between the inner column (3) and the outer column (4). The pile guiding device (1) includes a four-sided pyramid-shaped pile tip (101) and a concrete pile (103) made of steel plate welding. The pile tip (101) is anchored to the end of the concrete pile (103) by a steel reinforcement embedded part (102). The maximum width of the cone of the pile guiding device (1) is the same as that of the pile body (2). The pile body (2) is a rigid load-bearing skeleton made of longitudinal reinforcing bars (203) and transverse stirrups (204). The skeleton is bound with longitudinal grouting pipes (202) and oblique grouting pipe branches (201). After passing the concealed acceptance, it is formed by pouring concrete through molds. The pile body (2) can be manufactured in the factory. The grouting pipes (202) are arranged in the middle of the four sides of the pile body (2) and are made of seamless high-pressure steel pipes. One end of the grouting pipe branch (201) is connected to the grouting pipe (202), and the other end facing the pile tip (101) is equipped with a pipeline sealing hinge. When the pile column is statically pressed to the designated position, pressure grouting is applied. The pressure grout can open the sealing cover and then grouting is carried out. The top of the pile body (2) is reserved with a cup-shaped opening for connecting the inner column (3) and a joint, which is connected by a tongue and groove joint (7). The reinforcing steel bars inside the inner column (3) are connected to the pile body (2). The side of the pile cap transfer layer at the top of the pile body (2) is reserved with a steel bar through-hole (6). When the pile cap transfer layer is made, the pile cap compression steel bars can be passed through the pile body to increase the load of the pile column. Since the outer column (4) is installed outside the inner column (3), after being corrected for verticality, it is filled with grout that is one grade higher than concrete and needs to be filled from bottom to top. Therefore, a lower grouting hole (402) and an upper grout overflow hole (403) are opened on the outer column (4). The grout is poured into the grouting space (401) until the upper grout overflow hole (403) overflows. The static pressure bearing sleeve column composed of the inner column (3) and the outer column (4) is provided with a beam plate reserved groove (5). During actual construction, the height of the beam plate reserved groove (5) is determined according to the drawing refinement and the design beam plate thickness. It is used to install the beam plate at the top of the outer column (4) and to anchor the tensile steel bars in the beam plate to the inner column (3).

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