A connection structure of lattice column and precast pile, stand column pile and pile delivery device thereof

Abstract

The utility model discloses a kind of lattice column and the connecting structure of precast pile, vertical column pile and its pile feeder, belong to deep foundation pit supporting technical field.The lattice column and the connecting structure of precast pile of the utility model, including the connecting joint between precast pile and lattice column, connecting joint has end plate and four root inner insertion angle steel fixed on end plate, four root inner insertion angle steel is enclosed and forms square inner insertion slot, the lower end of lattice column is inserted in the inside of square inner insertion slot, four root limbs of lattice column are respectively located in the inside of corresponding inner insertion angle steel, and with corresponding inner insertion angle steel fixed connection.The utility model further discloses a kind of vertical column pile and its pile feeder of application above-mentioned connecting structure.The utility model utilizes the inner insertion connection of lattice column, the positioning of lattice column is convenient, it is favorable to improve connection accuracy;In addition, using square connecting end plate design, not only can reduce the contact area with soil body, reduce pile resistance, improve construction efficiency, but also can reduce steel material, reduce manufacturing cost.

Description

Technical Field

[0001] This utility model relates to deep foundation pit support piles, and more specifically, to a connection structure between a lattice column and a precast pile, a column pile and its pile driver. Background Technology

[0002] As urban construction expands into greater spatial depth, the scale of underground space development continues to grow, leading to a surge in large-scale deep foundation pit projects. These projects place stringent demands on the stability of foundation pit support systems, necessitating efficient and reliable support technologies to ensure construction safety and mitigate engineering disasters caused by support system failure.

[0003] As the core vertical support component in the deep foundation pit support system, the lattice column adopts a structural form of "synergistic combination of lattice column and precast pile," where angle steel and other steel components are welded into a spatial truss system through gusset plates. Compared with steel columns, while maintaining the same axial compressive bearing capacity, the lattice column, with its unique spatial truss structure, significantly improves the bending stiffness and overall stability of the component, effectively enhancing the control over foundation pit deformation. This optimized design not only fully utilizes the mechanical properties of steel but also achieves efficient material utilization, reaching a balance between structural performance and economy.

[0004] Traditionally, circular end plates are used to connect lattice columns and precast piles. For example, the "Connection Joint between Vertical Support Steel Lattice Column and Precast Pile" disclosed in Chinese Patent Publication No. CN107780533A (publication date: March 9, 2018) forms a connection joint consisting of a square-section steel plate column and a joint steel ring plate located on the bottom surface of the square-section steel plate column. The vertical angle steels at the four corners of the steel lattice column are tightly nested on the outer side of the four corners of the square-section steel plate column, and the perimeter area where the angle steels and the square-section steel plate column are in contact is fully welded. The steel ring plate at the top of the precast pile is fixedly connected to the joint steel ring plate.

[0005] Traditional lattice columns have the following common problems:

[0006] I. Traditional lattice columns typically use circular end plates as force transmission components to facilitate pile driving using steel pipe pile drivers. However, their large cross-sectional area can easily create significant soil resistance during pile driving operations. This is especially true when the foundation pile segment is a precast square pile, where the circular end plate often protrudes from the outer wall of the square pile and forms pile driving resistance in axial contact with the soil. Furthermore, it may cause soil disturbance, significantly increasing safety and environmental risks during construction.

[0007] Second, the force transmission path of the circular end plate relies on multiple ribs for force diffusion and transmission. In order to meet the load-bearing force transmission requirements, multiple ribs are used for force transmission, which consumes more materials and the force transmission of the ribs is unclear. In addition, the end plate needs to be precisely welded to multiple ribs, which requires high precision.

[0008] Third, in the hoisting and welding process, traditional lattice columns lack effective positioning benchmarks, making it difficult to control the centering accuracy. Furthermore, repeated fine-tuning of measurements is required during the measurement process, which reduces construction and installation efficiency.

[0009] Fourth, the external connection of the steel column lacing plate increases the amount of material used, and the joint between the steel column and the precast pile needs to be connected from the inside, that is, the joint of the precast pile is inserted into the inner side of the lower end of the lattice column. The external lacing plate can easily have an adverse effect on the connection and fixation between the angle steel of the lattice column and the joint. Summary of the Invention

[0010] 1. Technical problem to be solved by the utility model

[0011] The purpose of this utility model is to overcome the above-mentioned shortcomings of the existing technology and provide a connection structure between a lattice column and a precast pile, a column pile and its driving device. Using the technical solution of this utility model, the connection joint between the precast pile and the lattice column is provided with four internally inserted angle steels. The four internally inserted angle steels form a square inner slot for insertion and mating with the lower end of the lattice column. Utilizing the internal connection of the lattice column facilitates the connection and fixation between the lattice column and the connection joint, and also facilitates the positioning of the lattice column, which helps improve connection accuracy. In addition, the square connection end plate design not only reduces the contact area with the soil, reduces driving resistance, and improves construction efficiency, but also reduces steel material usage and lowers manufacturing costs.

[0012] In addition, the lattice column adopts a lacing plate internal connection structure, which on the one hand further facilitates the connection between the lattice column and the connection joint, and on the other hand optimizes the stress distribution of the lattice column, reduces the size of the lacing plate, and reduces material costs.

[0013] In addition, the matching column pile driver adopts a square pile head design, which can utilize the geometric characteristics of the square pile head to achieve quick and accurate alignment with the end plate, reducing installation and debugging time and making the pile driving force transmission more stable.

[0014] 2. Technical Solution

[0015] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0016] This utility model discloses a connection structure between a lattice column and a precast pile, including a connection joint disposed between the precast pile and the lattice column. The connection joint is fixedly installed at the pile head end of the precast pile. The connection joint has an end plate and four internal angle steels fixed on the end plate. The four internal angle steels enclose a square inner slot. The lower end of the lattice column is inserted into the inner side of the square inner slot. The four limbs of the lattice column are respectively located inside the corresponding internal angle steels and are fixedly connected to the corresponding internal angle steels.

[0017] Furthermore, the precast pile is a precast square pile, and the shape and size of the end plate are the same as or approximately the same as the shape and size of the pile head end face of the precast pile. The four sides of the end plate have protrusions that protrude from the side wall of the precast pile.

[0018] Furthermore, a column is provided below the end plate, and the connecting joint is pre-installed on the pile head end of the precast pile through the column, and the end plate is attached to the pile head end face of the precast pile.

[0019] The present invention provides a column pile, comprising a precast pile and a lattice column, wherein the precast pile and the lattice column are connected by the aforementioned connection structure between the lattice column and the precast pile.

[0020] Furthermore, the lattice column includes four members and several connecting plates. The four members are all angle steels extending along the axial direction, and the four members form a rectangular cross-section. Adjacent members are connected by connecting plates that are axially spaced apart, and the two ends of the connecting plates are inlaid on the corresponding members.

[0021] Furthermore, the lattice column has the aforementioned gusset plate at the insertion position of the connecting joint.

[0022] The present invention relates to a pile driver for column piles, comprising a steel sleeve and a square pile driver head. The square pile driver head is fixedly installed at the bottom end of the steel sleeve. The square pile driver head has a through hole for the lattice column to pass through, and the bottom end face of the square pile driver head can abut against the end plate of the connecting joint.

[0023] Furthermore, the steel casing is connected to the square pile head through a transition connection reinforcement section, and radially distributed reinforcing ribs are provided between the transition connection reinforcement section and the outer wall of the square pile head.

[0024] Furthermore, the transition connection reinforcement section is a disc with a square hole in the middle. The outer diameter of the disc is the same as the outer diameter of the steel sleeve. The upper outer periphery of the disc is fixedly connected to the steel sleeve. The size of the square hole is the same as the cross-sectional size of the through hole of the square pile head. The square pile head is fixed to the lower part of the disc.

[0025] 3. Beneficial effects

[0026] Compared with existing known technologies, the technical solution provided by this utility model has the following beneficial effects:

[0027] (1) A connection structure between a lattice column and a precast pile according to the present invention includes a connection joint provided between the precast pile and the lattice column. The connection joint has an end plate and four internally inserted angle steels fixed on the end plate. The four internally inserted angle steels enclose a square inner slot. The lower end of the lattice column is inserted into the inner side of the square inner slot. The four limbs of the lattice column are respectively located on the inner side of the corresponding internally inserted angle steels and are fixedly connected with the corresponding internally inserted angle steels. By using the internal connection of the lattice column, it is convenient to connect and fix the lattice column and the connection joint, and it is convenient to position the lattice column, which is beneficial to improving the connection accuracy.

[0028] (2) The present invention provides a connection structure between a lattice column and a precast pile, wherein the precast pile is a precast square pile, and the shape and size of the end plate are the same as or approximately the same as the shape and size of the pile head end face of the precast pile. The square connection end plate design can not only reduce the contact area with the soil, reduce the pile driving resistance, and improve construction efficiency, but also reduce the amount of steel used and reduce the manufacturing cost; the four sides of the end plate have protrusions protruding from the side wall of the precast pile. By optimizing the cross-sectional geometry of the end plate, the amount of steel used in the end plate can be effectively reduced and the project cost can be reduced while meeting the bearing capacity requirements.

[0029] (3) The connection structure between the lattice column and the precast pile of this utility model is provided with column legs below the end plate. The connection joint is pre-set on the pile head end of the precast pile through the column legs. The end plate is attached to the pile head end face of the precast pile. The end plate is pre-embedded and fixed on the precast pile. The connection is firm and reliable. Moreover, the connection joint pre-set on the precast pile has higher positioning accuracy with the lattice column. The hoisting and positioning is more efficient, which is conducive to improving construction efficiency.

[0030] (4) A column pile of this utility model includes a precast pile and a lattice column. The precast pile and the lattice column are connected by the above-mentioned connection structure between the lattice column and the precast pile. The connection operation is convenient, firm and reliable, and more conducive to the pile driving operation, which makes it easier to ensure the verticality of the column pile.

[0031] (5) A column pile of the present invention includes a lattice column comprising four limbs and several gusset plates. The four limbs are all angle steels extending along the axial direction and the four limbs form a rectangular cross-section. Adjacent limbs are connected by gusset plates distributed axially at intervals. The two ends of the gusset plates are internally connected to the corresponding limbs. The lattice column adopts the gusset plate internal connection structure, which on the one hand further facilitates the docking of the lattice column with the connecting joint, and on the other hand optimizes the stress distribution of the lattice column, reduces the size of the gusset plates, and reduces material costs.

[0032] (6) A column pile of the present invention has the above-mentioned gusset plate at the insertion position of the connecting joint on the lattice column, which ensures the structural strength of the connection.

[0033] (7) A pile driver for column piles according to the present invention includes a steel sleeve and a square pile driver. The square pile driver is fixedly installed at the bottom end of the steel sleeve. The square pile driver has a through hole for the lattice column to pass through. The bottom end face of the square pile driver can abut against the end plate of the connecting joint. By adopting the square pile driver design, the geometric characteristics of the square pile driver can be used to achieve quick and accurate alignment with the end plate, reducing the installation and debugging time and making the pile driving force transmission more stable.

[0034] (8) The present invention provides a pile driver for a column pile, wherein the steel sleeve and the square pile driver are connected by a transition connection reinforcement section. The transition connection reinforcement section and the outer wall of the square pile driver are provided with radially distributed reinforcement ribs. The transition connection reinforcement section and the reinforcement ribs improve the connection strength between the steel sleeve and the square pile driver and optimize the force transmission path during the pile driving process. Only a small number of ribs are needed to achieve effective load transmission.

[0035] (9) The present invention provides a pile driver for a column pile, wherein the transition connection reinforcement section is a disc with a square hole in the middle. The outer diameter of the disc is the same as the outer diameter of the steel sleeve. The upper outer periphery of the disc is fixedly connected to the steel sleeve. The size of the square hole is the same as the cross-sectional size of the through hole of the square pile driver. The square pile driver is fixed at the lower part of the disc, thereby realizing the intermediate transition between the circular steel sleeve and the square pile driver, which facilitates the manufacture of the pile driver. Attached Figure Description

[0036] Figure 1 This is a three-dimensional structural diagram of a connection structure between a lattice column and a precast pile according to the present invention;

[0037] Figure 2 This is a front view of a connection structure between a lattice column and a precast pile according to the present invention;

[0038] Figure 3 This is a schematic diagram showing the disassembled structure of the connection structure between the lattice column and the precast pile according to this utility model;

[0039] Figure 4 This is a schematic diagram of the assembly structure of the precast pile and the connecting joint in this utility model;

[0040] Figure 5 This is a schematic diagram of the connecting joint in this utility model;

[0041] Figure 6 This is a three-dimensional structural diagram of the lattice column in this utility model;

[0042] Figure 7 This is a schematic diagram of the cross-sectional structure of the lattice column in this utility model;

[0043] Figure 8This is a three-dimensional structural diagram of a pile driver for a column pile according to the present invention;

[0044] Figure 9 This is a front view of a pile driver for a column pile according to the present invention;

[0045] Figure 10 for Figure 9 A cross-sectional view along the AA direction;

[0046] Figure 11 This is a three-dimensional structural diagram of the pile driver and the column pile of this utility model in a coordinated state.

[0047] Figure 12 This is a front view structural diagram showing the cooperation state between the pile driver and the column pile of this utility model;

[0048] Figure 13 for Figure 12 A cross-sectional view along the BB direction.

[0049] Explanation of the labels in the diagram:

[0050] 1. Precast pile; 2. Connecting joint; 2-1. End plate; 2-2. Inserted angle steel; 2-3. Protrusion; 2-4. Column leg; 3. Lattice column; 3-1. Leg; 3-2. Draping plate; 4. Pile driver; 4-1. Steel sleeve; 4-2. Transition connection reinforcement section; 4-3. Square pile head; 4-4. Reinforcing rib plate. Detailed Implementation

[0051] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments.

[0052] [Example 1]

[0053] like Figures 1 to 3As shown, this embodiment of the connection structure between a lattice column and a precast pile includes a connection joint 2 disposed between the precast pile 1 and the lattice column 3. The connection joint 2 is fixedly installed at the pile head end of the precast pile 1. The connection joint 2 has an end plate 2-1 and four internal angle steels 2-2 fixed on the end plate 2-1. The four internal angle steels 2-2 enclose a square inner slot, meaning the four internal angle steels 2-2 are distributed at the four corners of the square inner slot, forming an interlocking positioning space using the right-angled cross-section of the internal angle steels 2-2. The lower end of the lattice column 3 is inserted into the inner side of the square inner slot, and the four limbs 3-1 of the lattice column 3 are respectively located inside the corresponding internal angle steels 2-2 and are fixedly connected to the corresponding internal angle steels 2-2. Generally, the connection between the precast pile 1 and the lattice column 3 occurs during construction. First, the precast pile 1 is constructed to the design elevation, with the connecting joint 2 at the upper end of the precast pile 1 protruding above the ground. Then, the lattice column 3 is hoisted and its lower end is inserted into the square inner slot. A suitable welding method is then used to weld the lattice column 3 to the connecting joint 2. Using this connection structure between the lattice column and the precast pile, the internal insertion connection of the lattice column 3 facilitates the connection and fixation between the lattice column 3 and the connecting joint 2, and also facilitates the positioning of the lattice column 3, thus improving connection accuracy.

[0054] like Figure 1 and Figure 3 As shown, in this embodiment, the precast pile 1 is a precast square pile. The shape and size of the end plate 2-1 are the same as or approximately the same as the shape and size of the pile head end face of the precast pile 1, so that the end plate 2-1 can cover the pile head end face of the precast pile 1 and play a role in distributing the load during the pile driving process. Compared with the existing circular end plate, the above-mentioned square connecting end plate design can not only reduce the contact area with the soil, reduce the pile driving resistance, improve construction efficiency, and reduce the disturbance to the soil, thus improving construction safety; but also the square end plate has a smaller area than the circular end plate, which can reduce the amount of steel used and reduce the manufacturing cost. Furthermore, the four sides of the end plate 2-1 each have protrusions 2-3 protruding from the side wall of the precast pile 1. The protrusions 2-3 can be directly cut from the end plate 2-1 or additionally welded to the end plate 2-1. By optimizing the cross-sectional geometry of the end plate 2-1, the amount of steel used in the end plate can be effectively reduced while meeting the bearing capacity requirements, thereby reducing the project cost.

[0055] like Figure 4 and Figure 5As shown, in this embodiment, a column limb 2-4 is also provided below the end plate 2-1. The column limb 2-4 can also be made of angle steel, and four columns are provided. The connecting joint 2 is pre-installed on the pile head end of the precast pile 1 through the column limb 2-4, and the end plate 2-1 is attached to the pile head end face of the precast pile 1. Furthermore, the column limb 2-4 and the inserted angle steel 2-2 are vertically opposite each other. With the above structure, the end plate 2-1 is pre-embedded and fixed on the precast pile 1, and the connection is firm and reliable. Moreover, the positioning accuracy of the connecting joint 2 pre-installed on the precast pile 1 and the lattice column 3 is higher, and the hoisting and positioning are more efficient, which is conducive to improving construction efficiency.

[0056] [Example 2]

[0057] This embodiment relates to a column pile. (Refer to...) Figure 1 and Figure 2 As shown, the column pile includes a precast pile 1 and a lattice column 3. The precast pile 1 and the lattice column 3 are connected by the connection structure of the lattice column and the precast pile as described in Embodiment 1 above. That is, the precast pile 1 and the lattice column 3 are connected by a connecting joint 2. The connection operation is convenient, firm and reliable, and more conducive to the pile driving operation, making it easier to ensure the verticality of the column pile. More importantly, because the configuration and size of the end plate 2-1 of the connecting joint 2 are optimized, the disturbance to the soil during construction can be effectively reduced, significantly reducing the safety and environmental risks during construction.

[0058] like Figure 6 and Figure 7 As shown, in this embodiment, the lattice column 3 adopts an internal connecting plate design. Specifically, the lattice column 3 includes four members 3-1 and several connecting plates 3-2. The four members 3-1 are all angle steels extending axially, and the four members 3-1 form a rectangular cross-section. Adjacent members 3-1 are connected by connecting plates 3-2 distributed axially at intervals. The two ends of the connecting plates 3-2 are internally connected to the corresponding members 3-1. Compared with the existing external connecting plate design, the connecting plates 3-2 are located on the inner side of the lattice column 3, which does not affect the insertion and matching of the four members 3-1 with the aforementioned internally inserted angle steels 2-2, further facilitating the docking of the lattice column 3 and the connecting joint 2. In addition, the internal connecting plate design can optimize the stress distribution of the lattice column 3, reduce the size of the connecting plates 3-2, and reduce material costs.

[0059] return Figure 1 and Figure 3 As shown, as a preferred design, the lattice column 3 has the aforementioned gusset plate 3-2 at the insertion position of the connecting joint 2. Distributing the gusset plate 3-2 to the bottom of the lattice column 3 can improve the structural strength of the connection, making the connection between the lattice column 3 and the precast pile 1 more firm and reliable.

[0060] [Example 3]

[0061] This embodiment relates to a pile driver that can be used for the aforementioned column piles. For example... Figures 8 to 13 As shown, the pile driver 4 includes a steel sleeve 4-1 and a square pile driver 4-3. The square pile driver 4-3 is fixedly installed at the bottom end of the steel sleeve 4-1. The square pile driver 4-3 has a through hole for the lattice column 3 to pass through, and the bottom end face of the square pile driver 4-3 can abut against the end plate 2-1 of the connecting joint 2. The square pile driver design allows for quick and accurate alignment with the connecting joint 2 by utilizing the geometric characteristics of the square pile driver 4-3, reducing installation and debugging time and making pile driving force transmission more stable. Furthermore, the square pile driver 4-3 enables a smooth transition between the precast pile 1 and the steel sleeve 4-1 during pile driving, reducing the energy consumption of mechanical equipment and improving pile driving construction efficiency.

[0062] The steel sleeve 4-1 is a round steel pipe for easy clamping. After the lattice column 3 is connected to the precast pile 1, the pile driver 4 can be installed on the outside of the lattice column 3, so that the square pile driver head 4-3 is sleeved on the outside of the connecting joint 2. Then, the steel sleeve 4-1 of the pile driver 4 is clamped using construction equipment such as a static pressure machine. The pressure is transmitted to the precast pile 1 through the end plate 2-1, further pressing the precast pile 1 into the soil. After the foundation pile is constructed to the design elevation, the pile driver 4 is pulled out along the axial direction of the lattice column 3. Due to the internal connection design of the connecting plate, the resistance of the lattice column 3 to the pile driver 4 is smaller during the extraction process, making the extraction easier and more convenient.

[0063] like Figures 8 to 10 As shown, in this embodiment, the steel sleeve 4-1 and the square pile head 4-3 are connected by a transitional connecting reinforcement section 4-2. Radially distributed reinforcing ribs 4-4 are provided between the transitional connecting reinforcement section 4-2 and the outer wall of the square pile head 4-3. The square pile head 4-3 has a square tubular structure, and the reinforcing ribs 4-4 can be right-angled triangular plates. They can be located on the side wall of the square pile head 4-3 and the bottom surface of the transitional connecting reinforcement section 4-2. This serves two purposes: firstly, to improve the connection strength between the square pile head 4-3 and the transitional connecting reinforcement section 4-2; and secondly, to optimize the force transmission path during pile driving. Only a small number of ribs are needed to achieve effective load transfer.

[0064] Specifically, the transition connection reinforcement section 4-2 is a disc with a square hole in the middle. The outer diameter of the disc is the same as the outer diameter of the steel sleeve 4-1. The upper outer periphery of the disc is fixedly connected to the steel sleeve 4-1. The size of the square hole is the same as the cross-sectional size of the through hole of the square pile head 4-3. The square pile head 4-3 is fixed at the lower part of the disc, realizing the intermediate transition between the circular steel sleeve 4-1 and the square pile head 4-3, which facilitates the manufacturing of the pile driver.

[0065] The connection structure between the lattice column and the precast pile, the column pile and the pile driver of this utility model have the following advantages compared with the prior art:

[0066] 1. The connection joint between the precast pile and the lattice column is equipped with four internally inserted angle steels. The four internally inserted angle steels form a square internal slot for insertion and mating with the lower end of the lattice column. The internal connection of the lattice column facilitates the connection and fixation between the lattice column and the connection joint, and also facilitates the positioning of the lattice column, which helps to improve the connection accuracy. Moreover, the insertion and positioning are quick, which effectively improves the construction efficiency, speeds up the project progress, and meets the needs of the project for efficient construction.

[0067] 2. The square connecting end plate design not only reduces the contact area with the soil, lowers the pile driving resistance, and improves construction efficiency, but also reduces the amount of steel used and lowers the manufacturing cost; it also reduces the frictional resistance of the soil against the end plate and the passive earth pressure during pile driving, reduces the energy consumption of mechanical equipment, and improves the efficiency of pile driving construction.

[0068] 3. The lattice column adopts an internal lacing structure, which on the one hand further facilitates the connection between the lattice column and the connecting joint, and on the other hand optimizes the stress distribution of the lattice column, reduces the size of the lacing plate, reduces material consumption, and reduces the cost of the project.

[0069] 4. The matching column pile driver adopts a square pile head design, which can utilize the geometric characteristics of the square pile head to achieve quick and accurate alignment with the end plate, reducing installation and debugging time and making the pile driving force transmission more stable.

[0070] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A connection structure between a lattice column and a precast pile, comprising a connection joint (2) disposed between a precast pile (1) and a lattice column (3), wherein the connection joint (2) is fixedly installed at the pile head end of the precast pile (1), characterized in that: The connecting joint (2) has an end plate (2-1) and four internal angle steels (2-2) fixed on the end plate (2-1). The four internal angle steels (2-2) enclose to form a square inner slot. The lower end of the lattice column (3) is inserted into the inner side of the square inner slot. The four limbs (3-1) of the lattice column (3) are located on the inner side of the corresponding internal angle steels (2-2) and are fixedly connected to the corresponding internal angle steels (2-2).

2. The connection structure between the lattice column and the precast pile according to claim 1, characterized in that: The precast pile (1) is a precast square pile. The shape and size of the end plate (2-1) are the same as or approximately the same as the shape and size of the pile head end face of the precast pile (1). The four sides of the end plate (2-1) have protrusions (2-3) protruding from the side wall of the precast pile (1).

3. The connection structure between the lattice column and the precast pile according to claim 1 or 2, characterized in that: Below the end plate (2-1) is a column (2-4), and the connecting joint (2) is pre-installed at the pile head end of the precast pile (1) via the column (2-4), and the end plate (2-1) is attached to the pile head end face of the precast pile (1).

4. A type of column pile, comprising a precast pile (1) and a lattice column (3), characterized in that: The precast pile (1) and the lattice column (3) are connected by the lattice column and the precast pile connection structure as described in claim 1, 2 or 3.

5. The column pile according to claim 4, characterized in that: The lattice column (3) includes four limbs (3-1) and several connecting plates (3-2). The four limbs (3-1) are all angle steels extending along the axial direction, and the four limbs (3-1) form a rectangular cross-section. Adjacent limbs (3-1) are connected by connecting plates (3-2) distributed axially at intervals. The two ends of the connecting plates (3-2) are inlaid on the corresponding limbs (3-1).

6. The column pile according to claim 5, characterized in that: The lattice column (3) has the aforementioned gusset plate (3-2) at the insertion position of the connecting joint (2).

7. A pile driver for a column pile as described in claim 4, 5, or 6, characterized in that: It includes a steel sleeve (4-1) and a square pile head (4-3). The square pile head (4-3) is fixedly installed at the bottom end of the steel sleeve (4-1). The square pile head (4-3) has a through hole for the lattice column (3) to pass through. The bottom end face of the square pile head (4-3) can abut against the end plate (2-1) of the connecting joint (2).

8. The pile driver according to claim 7, characterized in that: The steel casing (4-1) and the square pile head (4-3) are connected by a transition connection reinforcement section (4-2), and radially distributed reinforcing ribs (4-4) are provided between the transition connection reinforcement section (4-2) and the outer wall of the square pile head (4-3).

9. The pile driver according to claim 8, characterized in that: The transition connection reinforcement section (4-2) is a disc with a square hole in the middle. The outer diameter of the disc is the same as the outer diameter of the steel sleeve (4-1). The upper outer periphery of the disc is fixedly connected to the steel sleeve (4-1). The size of the square hole is the same as the cross-sectional size of the through hole of the square pile head (4-3). The square pile head (4-3) is fixed at the lower part of the disc.

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