Steel protection pipe combined pile end suitable for pore-forming cast-in-place concrete pile and pore-forming vibro-replacement gravel pile
By using a steel casing combined with a pile end structure in bored concrete piles, and by utilizing the combination of gravity columns and L-shaped support hooks, the problem of mud entering the steel pipe was solved, enabling the reuse of the pile tip and improving construction efficiency.
Patent Information
- Application Number
- CN202422451675.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2024-08-31
- Filing Date
- 2024-10-11
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-10-11
AI Technical Summary
In the construction of existing bored concrete cast-in-place piles and bored vibratory crushed stone piles, the entry of mud into the steel pipes leads to complicated construction, long construction period and high cost, especially when the pile tip cannot be removed, which further increases the cost.
A steel casing combined pile end structure suitable for bored concrete cast-in-place piles is adopted, including a hollow pile end body and a gravity column. Through the cooperation of L-shaped support hooks and chains, the gravity column drives the L-shaped support hooks to move, thereby realizing the change of the outer diameter of the pile end body, and simultaneously sinking and removing the pile end body, reducing the entry of mud and lowering construction costs.
This allows for the reuse of pile tips, reduces production costs, improves construction efficiency, simplifies the construction process, and reduces the possibility of mud entering the pile tip body.
Smart Images
Figure CN223620899U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of building construction, specifically to a steel casing combined pile end suitable for bored concrete cast-in-place piles and vibratory crushing stone piles. Background Technology
[0002] In pile driving operations, both bored concrete piles and bored vibratory crushed stone piles involve driving a steel pipe into the pile location, pouring concrete or crushed stone directly into the pipe, and then pulling the pipe out. During the driving process, mud may enter the steel pipe, which needs to be removed before concrete or crushed stone can be poured. This construction process is cumbersome and has a long construction period. If a pile tip is attached to the lower end of the steel pipe, although no mud will enter the steel pipe during the driving process, the pile tip cannot be removed after it is driven in, resulting in high construction costs. Utility Model Content
[0003] The purpose of this utility model is to overcome the above-mentioned shortcomings and provide a steel casing combined pile end suitable for bored concrete cast-in-place piles and vibratory crushing stone piles.
[0004] The technical solution adopted by this utility model to achieve the above objectives is as follows:
[0005] This invention relates to a composite pile end for bored concrete cast-in-place piles and vibratory compaction stone piles, comprising a hollow pile end body and a gravity column. At least two sets of L-shaped support hooks are evenly distributed along the circumference of the inner wall of the pile end body. The connecting end of each L-shaped support hook is rotatably connected to the inner wall of the pile end body. The pile end body has evenly distributed displacement holes corresponding to the L-shaped support hooks. Chains corresponding to the L-shaped support hooks are evenly distributed at the lower end of the gravity column. One end of each chain is connected to the gravity column, and the other end is connected to the L-shaped support hook. The gravity column moves downward and inserts into the space enclosed by the L-shaped support hooks within the pile end body, compressing the L-shaped support hooks and causing the free end of the L-shaped support hook to move out of the displacement hole and out of the pile end body. The top surface of the free end of the L-shaped support hook forms the force-bearing surface supporting the steel casing. The gravity column moves upward, driving the connecting end of the L-shaped support hook to rotate via the chain, and causing the free end of the L-shaped support hook to move from the displacement hole into the pile end body.
[0006] The outer diameter of the pile tip body changes by moving the L-shaped support hook driven by the gravity column, thereby enabling the pile tip body to sink synchronously with the steel casing and to be removed after sinking.
[0007] Furthermore, a steel tip is installed on the bottom surface of the pile end body.
[0008] By shearing away obstacles during the sinking process with the steel tip, wear on the pile end body is reduced, facilitating the smooth sinking of the steel casing.
[0009] Furthermore, the upper part of the pile end body is a cylinder, and the lower part is a cone.
[0010] The cone shape facilitates the sinking of the pile tip.
[0011] Furthermore, the L-shaped support hook is mounted on the pile end body via a rotating shaft, the rotating shaft is mounted on a shaft bracket, the shaft bracket is mounted on the inner wall of the pile end body, and limit plates are provided at both ends of the rotating shaft, the limit plates being mounted on the inner wall of the pile end body.
[0012] The L-shaped support hook is rotatably connected to the pile end body by a pivot, which improves the stability of the L-shaped support hook's telescopic movement and prevents the pivot from failing due to excessive displacement by a limiting plate.
[0013] Furthermore, the lower end of the gravity column is a cone.
[0014] The cone shape facilitates the insertion of the gravity column into the pile tip body.
[0015] Furthermore, the gravity column is solid.
[0016] The L-shaped support hook is retracted by using a solid gravity column to prevent the impact force when the steel protective pipe sinks.
[0017] Furthermore, a pressure plate is installed on the outer periphery of the gravity column.
[0018] The L-shaped support hook is retracted by using a pressure plate to prevent the impact force when the steel protective pipe sinks.
[0019] Furthermore, a lifting ring is installed at the top of the gravity column.
[0020] The gravity column is lifted by a lifting ring.
[0021] The feature of this utility model is that the outer diameter of the pile tip body changes by moving the L-shaped support hook driven by the gravity column, thereby realizing the synchronous sinking of the pile tip body with the steel protective pipe and the removal of the pile tip body after sinking, realizing the reuse of the pile tip, reducing production costs and improving construction efficiency. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 1 .
[0023] Figure 2 This is a schematic diagram of the structure of this utility model. Figure 2 .
[0024] Figure 3 This is a schematic diagram of the pile end body structure of this utility model.
[0025] Figure 4 yes Figure 3 Top view.
[0026] Figure 5This is a schematic diagram of the gravity column structure of this utility model.
[0027] Figure 6 yes Figure 5 Top view.
[0028] Among them: 1. Pile end body 11. Displacement hole 12. Steel tip 2. L-shaped support hook 21. Force-bearing surface 3. Rotating shaft 4. Shaft frame 5. Limiting plate 6. Gravity column 61. Pressure plate 62. Lifting ring 7. Steel protective pipe 8. Chain. Detailed Implementation
[0029] like Figure 1-6 As shown, this utility model is a steel end cap assembly suitable for bored concrete cast-in-place piles and vibratory compaction stone piles. It includes a hollow pile end body 1 and a solid gravity column 6. The outer diameter of the pile end body 1 is smaller than the inner diameter of the steel end cap 7. The upper part of the pile end body 1 is cylindrical and the lower part is conical, which facilitates insertion into the steel end cap 7 and easy sinking into the construction site. A steel tip 12 is installed on the bottom surface of the pile end body 1. A steel tip 12 is installed at the center of the bottom surface of the pile end body 1, and at least four steel tips 12 are evenly distributed along the circumference. The steel tips 12 shear the obstacles during the sinking process, reduce the wear of the pile end body 1, and facilitate the smooth sinking of the steel end cap 7.
[0030] The inner wall of the pile end body 1 is evenly distributed with at least two sets of L-shaped support hooks 2 along the circumference. Preferably, the inner wall of the pile end body 1 is evenly distributed with four sets of L-shaped support hooks 2 along the circumference to ensure the balance of the steel protective pipe 7 during driving and to prevent displacement. The L-shaped support hooks 2 are rotatably connected to the pile end body 1 via a rotating shaft 3. The rotating shaft 3 is mounted on a shaft bracket 4, and the shaft bracket 4 is mounted on the inner wall of the pile end body 1. Limiting plates 5 are provided at both ends of the rotating shaft 3 and are mounted on the inner wall of the pile end body 1. The limiting plates 5 prevent the rotating shaft 3 from displacing too much and failing. The pile end body 1 is evenly distributed with L-shaped support hooks 2. The gravity column 6 has a displacement hole 11 corresponding to the L-shaped support hook 2; the lower end of the gravity column 6 is evenly distributed with chains 8 corresponding to the L-shaped support hook 2, one end of the chain 8 is connected to the gravity column 6, and the other end is connected to the L-shaped support hook 2; a lifting ring 62 is installed on the top of the gravity column 6, and the lifting ring 62 is connected to a crane to lift the gravity column 6 and the pile end body 1 connected to the gravity column 6 by the chain 8 together; the lower end of the gravity column 6 is conical, which facilitates the insertion of the gravity column 6 into the pile end body 1; a pressure plate 61 is installed on the outer periphery of the gravity column 6, and the outer diameter of the pressure plate 61 is larger than the inner diameter of the pile end body 1. When the gravity column 6 is inserted into the pile end body 1, the pressure plate 61 presses on the L-shaped support hook 2, and the weight of the pressure plate 61 and the gravity column 6 prevents the steel protective pipe 7 from sinking. The impact force causes the L-shaped support hook 2 to retract; when the gravity column 6 moves downward, it inserts into the space enclosed by the L-shaped support hook 2 inside the pile end body 1, and squeezes the L-shaped support hook 2, causing the free end of the L-shaped support hook 2 to move out of the displacement hole 11 to the outside of the pile end body 1, and keeping the displacement hole 11 in a closed state to prevent mud from entering the inside of the pile end body 1 during the sinking process. At this time, the top surface of the free end of the L-shaped support hook 2 forms the force-bearing surface 21 supporting the steel protective pipe 7. The four force-bearing surfaces 21 are on the same plane. The steel protective pipe 7 is sleeved on the outside of the pile end body 1 and supported by the force-bearing surfaces 21; when the gravity column 6 moves upward, it drives the connecting end of the L-shaped support hook 2 to rotate through the chain 8, and causes the free end of the L-shaped support hook 2 to move from the displacement hole 11 into the pile end body 1.
[0031] During construction, this utility model is hoisted to the pile location, and the pile end body 1 is fixed by soil or other objects. At this time, the gravity column 6 is inserted into the pile end body 1 under the action of gravity, and the free end of the L-shaped support hook 2 is moved out of the displacement hole 11 to the outside of the pile end body 1. The top surface of the free end of the L-shaped support hook 2 forms the force-bearing surface 21 for supporting the steel protective pipe. The steel protective pipe 7 is sleeved on the outside of the pile end body 1 and supported on the force-bearing surface 21. The steel protective pipe 7 is driven by equipment such as a pile driver. The weight and impact force of the steel protective pipe 7 act on the force-bearing surface 21 of the L-shaped support hook 2, thereby sinking the pile end body 1 together. After it is sunk into place, the gravity column 6 is hoisted up. The gravity column 6 moves upward and moves the free end of the L-shaped support hook 2 into the pile end body 1. At this time, the pile end body 1 is not restricted and can be moved out of the steel protective pipe 7 with the gravity column 6. After being moved out, this utility model can be hoisted to the next pile location and reused.
[0032] This utility model uses the gravity column 6 to drive the L-shaped support hook 2 to change the outer diameter of the pile tip body 1, thereby realizing the synchronous sinking of the pile tip body 1 with the steel protective pipe 7 and the removal of the pile tip body 1 after sinking, realizing the reuse of the pile tip, reducing production costs and improving construction efficiency.
[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope of the technology disclosed in the present utility model, based on the technical solution and inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. Applicable to the steel casing combined pile end of bored concrete cast-in-place piles and vibratory compaction stone piles, characterized in that: It includes a hollow pile end body and a gravity column; the inner wall of the pile end body is evenly distributed with at least two sets of L-shaped support hooks along the circumference, the connecting end of the L-shaped support hook is rotatably connected to the inner wall of the pile end body, and the pile end body is evenly distributed with displacement holes corresponding to the L-shaped support hooks. The lower end of the gravity column is evenly distributed with chains corresponding to L-shaped support hooks. One end of the chain is connected to the gravity column, and the other end is connected to the L-shaped support hook. The gravity column moves down and inserts into the space enclosed by the L-shaped support hook inside the pile end body, and squeezes the L-shaped support hook so that the free end of the L-shaped support hook moves out from the displacement hole to the outside of the pile end body. The top surface of the free end of the L-shaped support hook forms the force-bearing surface that supports the steel protective pipe. The upward movement of the gravity column drives the L-shaped support hook connection end to rotate via a chain, and causes the free end of the L-shaped support hook to move from the displacement hole into the pile end body.
2. The steel casing composite pile end for bored concrete cast-in-place piles and vibratory compaction stone piles as described in claim 1, characterized in that: A steel tip is installed on the bottom surface of the pile end body.
3. The steel casing composite pile end for bored concrete cast-in-place piles and vibratory compaction stone piles as described in claim 1, characterized in that: The upper part of the pile end body is a cylinder, and the lower part is a cone.
4. The steel casing composite pile end for bored concrete cast-in-place piles and vibratory compaction stone piles as described in claim 1, characterized in that: The L-shaped support hook is mounted on the pile end body via a rotating shaft. The rotating shaft is mounted on a shaft bracket, which is mounted on the inner wall of the pile end body. Limiting plates are provided at both ends of the rotating shaft, and the limiting plates are mounted on the inner wall of the pile end body.
5. The steel casing composite pile end for bored concrete cast-in-place piles and vibratory compaction stone piles as described in claim 1, characterized in that: The lower end of the gravity column is a cone.
6. The steel casing composite pile end for bored concrete cast-in-place piles and vibratory compaction stone piles as described in claim 1, characterized in that: The gravity column is solid.
7. The steel casing composite pile end for bored concrete cast-in-place piles and vibratory compaction stone piles as described in claim 1, characterized in that: A pressure plate is installed on the outer periphery of the gravity column.
8. The steel casing composite pile end for bored concrete cast-in-place piles and vibratory compaction stone piles as described in claim 1, characterized in that: A lifting ring is installed at the top of the gravity column.