Deep foundation high-precision steel column pile with guide cone

Abstract

The utility model relates to the technical field of column pile, disclose a kind of deep foundation pit high-precision steel column pile with guide cone, including lattice column and soil layer, the lattice column is located inside the soil layer, the lattice column bottom is provided with reinforcing bar and concrete pile, the reinforcing bar is located inside the concrete pile, the lattice column top is provided with grouting positioning assembly, the lattice column bottom is fixedly connected with mounting plate, the mounting plate bottom is provided with guide assembly, the guide assembly includes cone head and multiple guide plates, the cone head and multiple guide plates are located the mounting plate bottom, the cone head top is fixedly connected with fixed plate.In the utility model, the multiple guide plates are pushed to be conical by the reaction force of spring and are unfolded, so that the widest part is adaptively attached to the hole wall, the displacement of the lattice column during the descending process is avoided, the problems of easy deviation and low positioning efficiency of the lattice column when entering the hole, large error are solved, and the construction efficiency and the precision of the steel column pile are improved.

Description

Technical Field

[0001] This utility model relates to the field of column pile technology, and in particular to a high-precision steel column pile for deep foundation pits with a guide cone. Background Technology

[0002] In deep foundation pit construction, steel column piles are key components supporting temporary structures within the pit and transferring loads from the superstructure to the stable underground soil layer. They are primarily used in underground engineering projects such as subway stations, basements of high-rise buildings, and large underground utility tunnels. Their core function is to bear the vertical loads of the horizontal support system within the pit during excavation and stably transfer these loads to the underlying bearing layer. Simultaneously, they must ensure their verticality and planar positioning accuracy during construction and use, providing precise reference points for subsequent structural construction. These steel column piles typically use steel as the primary material, combined with specific connection structures and positioning components, to form a support structure that combines high strength, high stability, and high precision. They are crucial infrastructure for ensuring the safe and efficient progress of deep foundation pit projects. In current deep foundation pit engineering, the most widely used and relevant existing equipment for high-precision steel column piles with guide cones is the lattice column. The lattice column is mainly constructed of four equilateral angle steels as main members, which are welded together at certain intervals by tie bars to form a spatial truss structure. Connecting plates are usually installed at the top and bottom of the main members for connection to the superstructure or lower pile foundation; some lattice columns have positioning ear plates welded to the outside of the main members for temporary fixation during construction. Its working principle involves lifting the lattice column with a crane, aligning its axis with the pre-set pile hole axis, and then slowly lowering it into the pile hole. The bottom of the lattice column is inserted into the top of the concrete-filled pile or steel pile in the pile hole, and is fixed through the connection structure between the main members and the lower pile foundation. The upper part connects to the support beams, platforms, and other structures within the foundation pit, transferring the upper load to the lower stable soil layer through the truss structure composed of the main members and tie bars, thus providing vertical support and load transfer. In existing deep foundation pit projects, lattice columns commonly suffer from problems such as easy displacement, low positioning efficiency, and large errors during installation. Because lattice columns are truss structures with a large slenderness ratio, they are prone to lateral swaying during hoisting and lowering due to factors such as wind force at the construction site, deviations in the hoisting rope angle, and the flatness of the surrounding area. This makes it difficult to keep their axis aligned with the pile hole axis, resulting in displacement during installation. Furthermore, existing lattice column installation lacks a dedicated guiding structure. Construction workers must repeatedly adjust the column position by visual observation combined with auxiliary measuring tools. This adjustment process requires multiple pauses in lowering operations to correct positioning deviations before continuing, significantly extending the installation time for a single lattice column and resulting in low positioning efficiency. Furthermore, even after multiple adjustments, the final installation position of the lattice column after entering the hole will still deviate from the design coordinates beyond the allowable range due to factors such as slight swaying during the lowering process and local unevenness of the inner wall of the pile hole. The large error directly affects the connection accuracy of the subsequent support structure. To address this issue, a high-precision steel column pile with a guide cone for deep foundation pits is proposed. Summary of the Invention

[0003] To overcome the above shortcomings, this utility model provides a high-precision steel column pile for deep foundation pits with a guide cone, aiming to improve the problems of easy deviation, low positioning efficiency and large error of lattice columns when entering the hole in the existing technology.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A high-precision steel column pile for deep foundation pits with a guide cone includes a lattice column and a soil layer. The lattice column is located inside the soil layer. The bottom of the lattice column is provided with steel bars and concrete piles. The steel bars are located inside the concrete piles. The top of the lattice column is provided with a grouting positioning component. The bottom of the lattice column is fixedly connected with an installation plate. The bottom of the installation plate is provided with a guide component. The guide assembly includes a cone head and multiple guide plates. The cone head and multiple guide plates are located at the bottom of the mounting plate. A fixing plate is fixedly connected to the top of the cone head. A second rotating shaft is rotatably connected to the inner wall of the fixing plate. The outer wall of the second rotating shaft is fixedly connected to the bottom of the guide plate. A fixing post is fixedly connected to the top of the fixing plate. The top of the fixing post is fixedly connected to the bottom of the mounting plate. A transmission assembly is provided outside the fixing post.

[0005] As a further description of the above technical solution: The transmission assembly includes multiple connecting rods located outside the fixed column. Each connecting rod has a rotating shaft fixedly connected to one side. Each guide plate has multiple connecting blocks fixedly connected inside. Both ends of each rotating shaft are rotatably connected inside the connecting blocks.

[0006] As a further description of the above technical solution: Each of the connecting rods is fixedly connected to a rotating shaft at the other end, and a sliding plate is rotatably connected to the outer wall of the multiple rotating shafts. The sliding plate is slidably connected to the outer wall of the fixed column.

[0007] As a further description of the above technical solution: A spring is provided on the top of the sliding plate, one end of which is fixedly connected to the bottom of the mounting plate, and the other end of which is fixedly connected to the top of the sliding plate.

[0008] As a further description of the above technical solution: A limiting ring is fixedly connected to the outer wall of the fixed column, and the limiting ring is located at the bottom of the sliding plate.

[0009] As a further description of the above technical solution: The grouting positioning component includes a positioning cover, which is located at the top of the lattice column. The bottom of the positioning cover is fixedly connected to the top of the soil layer, and a grouting port is provided at the top of the positioning cover.

[0010] As a further description of the above technical solution: The positioning cover has multiple adjustment ports on its side wall. A slotted limiting plate is fixedly connected to the top of the inside of the positioning cover. A threaded rod is rotatably connected inside the slotted limiting plate. The threaded rod is rotatably connected inside the adjustment port.

[0011] As a further description of the above technical solution: The slotted limiting plate has a slider that is slidably connected inside, and the inner wall of the slider is threadedly connected to the outer wall of the threaded rod.

[0012] This utility model has the following beneficial effects: In this invention, the reaction force of the spring pushes multiple guide plates to unfold in a conical shape, so that the widest part of the guide plate adaptively fits the hole wall, preventing the lattice column from shifting during descent. This solves the problems of easy displacement, low positioning efficiency, and large error when the lattice column enters the hole, and improves construction efficiency and the accuracy of steel column piles.

[0013] In this invention, by setting a positioning cover and then adjusting the sliders at both ends of the threaded rod to fix the lattice column in the center, and finally grouting through the grouting port, the fixing process is simplified, ensuring the verticality and stability of the structure. This solves the problems of time-consuming operation and insufficient precision of steel bar and wooden board support in the prior art, and improves the stability of the grouting process. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of a high-precision steel column pile with a guide cone for deep foundation pits proposed in this utility model. Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 This is an exploded structural diagram of a guide plate for a high-precision steel column pile with a guide cone in a deep foundation pit, as proposed in this utility model. Figure 4 This is a schematic diagram of the slotted limiting plate for a high-precision steel column pile with a guide cone in a deep foundation pit, as proposed in this utility model. Figure 5 This is a cross-sectional structural diagram of a slider for a high-precision steel column pile with a guide cone in a deep foundation pit, as proposed in this utility model.

[0015] Legend: 1. Lattice column; 2. Concrete pile; 3. Soil layer; 4. Positioning cover; 5. Cone head; 6. Reinforcing bar; 7. Mounting plate; 8. Spring; 9. Fixed column; 10. Guide plate; 11. Rotating shaft one; 12. Sliding plate; 13. Limiting ring; 14. Fixed plate; 15. Rotating shaft two; 16. Connecting block; 17. Rotating shaft three; 18. Connecting rod; 19. Adjustment port; 20. Grouting port; 21. Grooved limiting plate; 22. Threaded rod; 23. Sliding block. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Reference Figures 1-3 This utility model provides an embodiment of a high-precision steel column pile for deep foundation pits with a guide cone, comprising a lattice column 1 and a soil layer 3. The lattice column 1, as part of the permanent structure, serves as a temporary support column in the reverse construction method. After the foundation pit project is completed, concrete is poured to make it a permanent structure. The lattice column 1 is located inside the soil layer 3. The bottom of the lattice column 1 is provided with steel bars 6 and concrete piles 2. The steel bars 6 are located inside the concrete piles 2. The structure formed by the steel bars 6 and the concrete piles 2 encloses the lattice column 1 to improve its stability. A grouting positioning component is provided at the top of the lattice column 1. An installation plate 7 is fixedly connected to the bottom of the lattice column 1. The installation plate 7 provides an installation space for the guide component at the bottom of the lattice column 1. The guide component is provided at the bottom of the installation plate 7. The guiding assembly includes a cone head 5 and multiple guide plates 10. The cone head 5, while cooperating with other components to guide the pile body smoothly into the soil layer 3, also serves to protect the head of the guiding assembly. The guide plates 10 are used to form a conical surface and play the main guiding role. The cone head 5 and multiple guide plates 10 are located at the bottom of the mounting plate 7. A fixing plate 14 is fixedly connected to the top of the cone head 5. The fixing plate 14 is used to support the second rotating shaft 15 and connect to the fixing column 9. The second rotating shaft 15 is rotatably connected to the inner wall of the fixing plate 14. The second rotating shaft 15 is used to adjust the angle of the guide plate 10. The outer wall of the second rotating shaft 15 is fixedly connected to the bottom of the guide plate 10. A fixing column 9 is fixedly connected to the top of the fixing plate 14. The fixing column 9 connects to the mounting plate 7 and fixes the direction of the guiding assembly. The top of the fixing column 9 is fixedly connected to the bottom of the mounting plate 7. A transmission assembly is provided outside the fixing column 9. The transmission assembly includes multiple connecting rods 18. The connecting rods 18 are used to transmit the movement of the sliding plate 12 to the guide plate 10. The multiple connecting rods 18 are located outside the fixing column 9. Each connecting rod... Each guide plate 18 has a fixedly connected rotating shaft 17 on one side, which connects the connecting rod 18 to the connecting block 16. Multiple connecting blocks 16 are fixedly connected inside each guide plate 10, which fix the installation position of the rotating shaft 17. Both ends of each rotating shaft 17 are rotatably connected inside the connecting block 16. A rotating shaft 11 is fixedly connected to the other end of each connecting rod 18, which connects the connecting rod 18 to the sliding plate 12. Sliding plates are rotatably connected to the outer walls of the multiple rotating shafts 11. 12. The sliding plate 12 is used to transmit the elastic force of the spring 8 to the connecting rod 18. The sliding plate 12 is slidably connected to the outer wall of the fixed column 9. The top of the sliding plate 12 is provided with the spring 8. One end of the spring 8 is fixedly connected to the bottom of the mounting plate 7, and the other end of the spring 8 is fixedly connected to the top of the sliding plate 12. The outer wall of the fixed column 9 is fixedly connected with the limiting ring 13. When the connecting rod 18 is horizontal, the limiting ring 13 is in contact with the sliding plate 12 to limit the lowest position of the sliding plate 12. The limiting ring 13 is located at the bottom of the sliding plate 12.

[0018] Reference Figure 1 , Figure 4 and Figure 5The grouting positioning component includes a positioning cover 4, which is used to fix the positioning component to the ground. The positioning cover 4 is located at the top of the lattice column 1, and the bottom of the positioning cover 4 is fixedly connected to the top of the soil layer 3. A grouting port 20 is opened at the top of the positioning cover 4 for injecting grouting material. Multiple adjustment ports 19 are opened on the side wall of the positioning cover 4 for adjusting the threaded rod 22. A slotted limiting plate 21 is fixedly connected to the top inside the positioning cover 4 for guiding the movement trajectory of the slider 23. A threaded rod 22 is rotatably connected inside the slotted limiting plate 21 for driving the slider 23 to move and achieve centering and clamping. The threaded rod 22 is rotatably connected inside the adjustment port 19. A slider 23 is slidably connected inside the slotted limiting plate 21 for clamping and fixing the top position of the lattice column 1 to prevent it from tilting during grouting. The inner wall of the slider 23 is threadedly connected to the outer wall of the threaded rod 22.

[0019] Working principle: When guiding the descent of the lattice column 1, the reaction force of the spring 8 first pushes the sliding plate 12 downward. Under the rotation connection of the rotating shaft 11, the connecting rods 18 around the perimeter tend to be horizontal. The guide plate 10, which is connected to the connecting rods 18 through the rotating shaft 3 17 and the connecting block 16, is pushed outward. Since the bottom end of the guide plate 10 rotates within the fixed plate 14 through the rotating shaft 2 15, the multiple guide plates 10 can only unfold in a conical shape. Its widest part adaptively fits the hole wall, avoiding displacement of the lattice column 1 during the descent process. This solves the problems of easy displacement, low positioning efficiency, and large error when the lattice column 1 enters the hole. During the pouring process, the positioning cover 4 is first fixed in the set position on the ground. Then, an electric drill is used to rotate the threaded rod 22 from the adjustment port 19. The sliders 23 at both ends of the threaded rod 22 slide towards the center under the guidance of the slotted limiting plate 21, fixing the lattice column 1 in the center. Then, grout is poured through the grouting port 20 to form the structure. This simplifies the fixing process, ensures the verticality and stability of the structure, and solves the problem of insufficient accuracy of simple supports in the existing technology.

Claims

1. A high-precision steel column pile for deep foundation pits with a guide cone, comprising a lattice column (1) and a soil layer (3), characterized in that: The lattice column (1) is located inside the soil layer (3). The bottom of the lattice column (1) is provided with a steel bar (6) and a concrete pile (2). The steel bar (6) is located inside the concrete pile (2). The top of the lattice column (1) is provided with a grouting positioning component. The bottom of the lattice column (1) is fixedly connected with an installation plate (7). The bottom of the installation plate (7) is provided with a guide component. The guide assembly includes a cone (5) and multiple guide plates (10). The cone (5) and multiple guide plates (10) are located at the bottom of the mounting plate (7). A fixing plate (14) is fixedly connected to the top of the cone (5). A rotating shaft (15) is rotatably connected to the inner wall of the fixing plate (14). The outer wall of the rotating shaft (15) is fixedly connected to the bottom of the guide plate (10). A fixing column (9) is fixedly connected to the top of the fixing plate (14). The top of the fixing column (9) is fixedly connected to the bottom of the mounting plate (7). A transmission assembly is provided on the outside of the fixing column (9).

2. The high-precision steel column pile with guide cone for deep foundation pits according to claim 1, characterized in that: The transmission assembly includes multiple connecting rods (18), which are located outside the fixed column (9). Each connecting rod (18) has a rotating shaft three (17) fixedly connected to one side. Each guide plate (10) has multiple connecting blocks (16) fixedly connected inside. Both ends of each rotating shaft three (17) are rotatably connected inside the connecting block (16).

3. A high-precision steel column pile with guide cone for deep foundation pits according to claim 2, characterized in that: Each of the connecting rods (18) is fixedly connected to a rotating shaft (11) at the other end. A sliding plate (12) is rotatably connected to the outer wall of the multiple rotating shafts (11). The sliding plate (12) is slidably connected to the outer wall of the fixed column (9).

4. A high-precision steel column pile with guide cone for deep foundation pits according to claim 3, characterized in that: A spring (8) is provided on the top of the sliding plate (12). One end of the spring (8) is fixedly connected to the bottom of the mounting plate (7), and the other end of the spring (8) is fixedly connected to the top of the sliding plate (12).

5. A high-precision steel column pile with guide cone for deep foundation pits according to claim 4, characterized in that: The outer wall of the fixed column (9) is fixedly connected to a limiting ring (13), which is located at the bottom of the sliding plate (12).

6. A high-precision steel column pile with guide cone for deep foundation pits according to claim 1, characterized in that: The grouting positioning component includes a positioning cover (4), which is located on the top of the lattice column (1). The bottom of the positioning cover (4) is fixedly connected to the top of the soil layer (3), and a grouting port (20) is provided on the top of the positioning cover (4).

7. A high-precision steel column pile with guide cone for deep foundation pits according to claim 6, characterized in that: The positioning cover (4) has multiple adjustment ports (19) on its side wall. A slotted limiting plate (21) is fixedly connected to the top of the inside of the positioning cover (4). A threaded rod (22) is rotatably connected inside the slotted limiting plate (21). The threaded rod (22) is rotatably connected inside the adjustment port (19).

8. A high-precision steel column pile with guide cone for deep foundation pits according to claim 7, characterized in that: The slotted limiting plate (21) has a slider (23) slidably connected inside, and the inner wall of the slider (23) is threadedly connected to the outer wall of the threaded rod (22).

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