Wedge-shaped components for pile driving

Abstract

This utility model discloses a wedge-shaped component for cutting off and removing cast-in-place piles in conjunction with a casing. The component includes a main body with an assembly portion and a partially wedge-shaped cutting portion. The assembly portion is used for assembling the main body with the equipment. The cutting portion generates a clamping force to hold the cast-in-place pile. During the rotation of the casing, the cutting portion generates a destructive force that breaks the cast-in-place pile, thus cutting it off. This utility model, used in conjunction with a casing, can cut off and destroy existing cast-in-place piles, causing structural damage and facilitating pile removal, thus providing a foundation for subsequent construction.

Description

Technical Field

[0001] This utility model relates to the field of pile foundation clamping auxiliary technology, and in particular to wedge-shaped components for clamping piles. Background Technology

[0002] As existing buildings age, it becomes necessary to treat some existing buildings or pile foundations in order to build new buildings. As the most commonly used building structure, pile foundations require repeated operations to completely remove the pile foundations after grouting. However, in the current technology, relying solely on casings is not enough to complete the entire pile foundation removal. Utility Model Content

[0003] The purpose of this utility model is to provide a wedge-shaped component that assists in the removal of cast-in-place pile foundations. It is matched with the casing, etc., so that the existing cast-in-place piles can be cut off and then removed by multiple cuts.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution.

[0005] A wedge-shaped component for cutting off piles is used in conjunction with a casing to cut off and remove cast-in-place piles. It includes a component body, on which an assembly part and a partially wedge-shaped cutting part are formed. The assembly part is used for assembling the component body with the equipment. The cutting part forms a clamping force to hold the cast-in-place pile. During the rotation of the casing, the cutting part generates a destructive force to break off the cast-in-place pile.

[0006] Furthermore, the pile clamping part has a gap surface, which creates a gap between the cast-in-place pile and the casing.

[0007] Furthermore, the gap surface forms a stress concentration area, and during the rotation of the casing, the stress concentration area generates concentrated stress that causes damage.

[0008] Furthermore, the gap surface is an inclined structure, and the inclined surface forms an acute angle with the cast-in-place pile.

[0009] Furthermore, the stake-clamping part also includes an extension portion formed by a partial extension of the assembly part, the inclined surface of which is inclined toward the extension portion and overlaps with the end of the extension portion.

[0010] Furthermore, several vent holes are formed on both the assembly part and the stake part.

[0011] Furthermore, the assembly part is located above the stake part, and the projection formed by the assembly part covers the projection formed by the stake part.

[0012] Furthermore, the length of the assembly part is at least twice the length of the stake part.

[0013] Furthermore, the assembly part is provided with a lifting hole, which is in the same direction and / or perpendicular to the length direction of the piling part, and when the lifting hole is perpendicular, it is located at both ends of the assembly part, respectively, along with the piling part.

[0014] The beneficial effects of this utility model are as follows: The wedge-shaped component for pile cutting in this utility model, when used in conjunction with a protective casing, enables the cutting of existing cast-in-place piles, providing a basic environment for subsequent work.

[0015] The main function of this invention is to gradually insert into the gap between the pile foundation and the rotating casing, thereby generating concentrated stress through the wedge effect, which ultimately leads to the cracking or torsion of the pile foundation. Attached Figure Description

[0016] Figure 1 A schematic diagram of the structure of the wedge-shaped component for pile clamping provided by this utility model; Figure 2 This is a front view of the wedge-shaped component for stake-clamping provided by this utility model; Figure 3 A top view of the wedge-shaped component for stake-clamping provided by this utility model; Figure 4 A cross-sectional view of the wedge-shaped component for stake-clamping provided by this utility model; Figure 5 Assembly drawing of the wedge-shaped component and casing for pile driving provided by this utility model; In the picture: 100. Component body; 110. Assembly part; 111. Lifting hole; 120. Pile clamping part; 121. Gap surface; 200. Casing; 300. Rotary drilling rig; 400. Cast-in-place pile. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, it should be noted that these embodiments are not intended to limit the present invention. Equivalent transformations or substitutions in function, method, or structure made by those skilled in the art based on these embodiments are all within the protection scope of the present invention.

[0018] See attached document Figure 1-5As shown, the wedge-shaped component for piling in this embodiment is used to cut off and remove the cast-in-place pile in conjunction with the casing. It includes a component body 100, on which an assembly part 110 and a piling-cutting part 120 that is partially wedge-shaped are formed. The assembly part 110 is used to assemble the component body 100 with the equipment. The assembly can be a lifting device or a casing 200, etc. The piling-cutting part 120 forms a clamping force to hold the cast-in-place pile. When the casing 200 rotates, the piling-cutting part 120 generates a destructive force to break the cast-in-place pile.

[0019] In this embodiment, the casing 200 is pre-lifted to the pile location and connected to a rotary drilling rig 300 to facilitate its rotation. Then, the entire component body 100 is lifted between the casing 200 and the cast-in-place pile 400 using lifting equipment. A clamp is then added to hold the entire cast-in-place pile 400. When the casing 200 rotates, the clamp holds the cast-in-place pile 400, and the piling clamp 120 between the cast-in-place pile and the casing 200 generates a destructive force that breaks the pile. The clamp and the piling clamp 120 are misaligned, allowing the piling clamp to directly engage with the cast-in-place pile. In this embodiment, the wedge-shaped component is a device with a wedge-shaped tip, used in conjunction with the rotary casing. In this embodiment, the overall operation and principle of the wedge-shaped component after being used with the casing are as follows: The wedge-shaped pile clamping part is placed in the gap between the cast-in-place pile and the casing. The weight of the wedge-shaped block squeezes the cast-in-place pile and the casing together. There is no connecting device between the wedge-shaped block and the casing. When rotating, the pile foundation is clamped off by the friction generated by the mutual squeezing between the wedge-shaped block and the casing.

[0020] The wedge-shaped component used for pile clamping in this embodiment mainly functions to generate concentrated stress by gradually inserting it into the gap between the pile foundation and the rotating casing, thereby causing the pile foundation to crack or break. The entire process requires a driving force similar to that formed by the casing to rotate it and generate the corresponding stress.

[0021] In this embodiment, a cutting component can be installed at the bottom of the casing. The cutting component then cuts the grouting pile at the bottom of the casing, while the component body forms an auxiliary destructive force, causing the grouting pile to be damaged in multiple places, thus completing the final breakage. For example, if the breakage is at the middle position of the grouting pile 400, 2-4m away, the component body and the cutting component can be set at 2 meters and 4 meters respectively, thereby completing the damage to the grouting pile at the two locations and in between, thus completing the breakage at this point.

[0022] To ensure the gap between the casing 200 and the cast-in-place pile 400, a gap surface 121 is formed in the pile clamping part 120. The gap surface 121 creates a gap between the cast-in-place pile and the casing 200. It can be seen that the casing and the cast-in-place pile are not directly attached, but the existence of the gap surface enables it to function, thereby increasing the gap between the casing and the cast-in-place pile and providing the possibility of further damage to the cast-in-place pile.

[0023] Furthermore, in order to fully utilize the casing 200, and to create a stress concentration area on the gap surface 121, the stress concentration area generates concentrated stress that causes damage during the rotation of the casing 200. At this time, as the casing rotates, the forces at various points inside the cast-in-place pile will also be adjusted and affected, and most of the stress will be concentrated towards the gap surface.

[0024] To facilitate insertion, the gap surface 121 is an inclined structure, forming an acute angle with the cast-in-place pile 400. During the rotation of the casing, the cast-in-place pile is gradually crushed and destroyed by the force. Initially, the inclined structure inserts its end between the entire cast-in-place pile and the casing. As the casing rotates and destructive forces are generated, the cast-in-place pile is partially destroyed, increasing the distance between the cast-in-place pile and the casing. This allows more of the pile portion to enter between the casing and the cast-in-place pile, increasing the force and accelerating the destruction of the entire cast-in-place pile.

[0025] To increase the strength and stress resistance of the piling section 120, the piling section 120 further includes an extension portion formed by a partial extension of the assembly section 110. The inclined surface slopes towards the extension portion and overlaps with the end of the extension portion. Thus, the piling section at this point resembles a hollow cavity, having two sides, resulting in greater stress resistance.

[0026] In this embodiment, both the assembly part 110 and the pile clamping part 120 have several vent holes (not shown in the figure). The presence of several vent holes facilitates airflow in the pile clamping part during underground construction, thereby aiding in the extraction of the wedge from the soil.

[0027] During assembly, the assembly part 110 is located above the peg part 120, and the projection formed by the assembly part 110 covers the projection formed by the peg part 120. This results in a larger cross-sectional area for the assembly part 110, enabling better assembly. In this embodiment, for example, if the assembly part 110 is a cuboid structure, the peg part 120 includes a smaller cuboid structure with a smaller cross-sectional area than the cuboid structure of the assembly part 110. The bottom of the smaller cuboid structure extends to form a three-dimensional structure with a right-angled triangle cross-section, where one side of the right-angled triangle is an extension line of the smaller cuboid structure. The entire structure can be a hollow metal structure.

[0028] Specifically, the length of the assembly part 110 is at least twice the length of the stake part 120. In this embodiment, the assembly part is selected to be of a longer length, thereby increasing the assembly length with the crane or the like, and ensuring the secure assembly with the crane or the like.

[0029] To facilitate subsequent lifting of the entire wedge-shaped component, the assembly part 110 is provided with lifting holes 111. The lifting holes 111 are in the same direction as and / or perpendicular to the length direction of the piling part 120. When the lifting holes 111 are perpendicular, they are located at opposite ends of the assembly part 110, respectively. In this embodiment, to facilitate lifting in multiple directions, the lifting holes can be provided laterally, at the ends, or simultaneously in both directions. When used in conjunction with a crane, this generates force in one or two directions, allowing for direct vertical lifting, lateral lifting, or lifting at a certain angle using lateral lifting at the ends.

[0030] In this embodiment, when the component body is a metal component, its compressive strength is at least 3000KN. When the cast-in-place pile is damaged, the wedge-shaped component will inevitably generate pressure between the cast-in-place pile 400. During this process, the 3000KN compressive strength will be directly transferred to the pile foundation, causing the pile foundation to be damaged.

[0031] The usage process in this embodiment is as follows: (1) Insertion force: While the rotating casing is rotating, the wedge-shaped member is gradually inserted between the pile foundation and the casing. The insertion of the wedge-shaped member will push the local area of ​​the pile foundation outward, generating destructive compressive force.

[0032] (2) Wedge effect: Wedge-shaped members exert increasing lateral pressure by gradually widening the gap between the pile foundation and the surrounding soil. This pressure generates strong stress concentration at a specific point in the pile foundation, leading to bending, cracking or direct torsion of the pile foundation.

[0033] (3) Torsional failure: When the wedge member is fully inserted and sufficient pressure is applied, the pile foundation will twist or break at its stress point. The wedge member completes the physical failure of the pile foundation by acting directly on the structural layer of the pile foundation.

[0034] In this embodiment, preferably, the entire wedge-shaped component is 0.63m long, 0.6m wide, and 5.5m high, with a self-weight of 5.5t. Choosing a length of approximately 1 meter ensures that the torsional failure of the 400mm cast-in-place pile is relatively small each time, achieving overall torsional failure prevention.

[0035] The detailed descriptions listed above are merely specific descriptions of feasible implementations of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent implementations or modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A wedge-shaped member for use in the cutting-off of a cast-in-place pile for removal of the pile with a casing, characterised in that, The device includes a component body, on which an assembly part and a partially wedge-shaped piling part are formed. The assembly part is used for assembling the component body with the equipment. The piling part forms a clamping force to hold the cast-in-place pile. During the rotation of the casing, the piling part generates a destructive force to break the cast-in-place pile.

2. The wedge member for staking as defined in claim 1, wherein, The pile section has a gap surface, which creates a gap between the cast-in-place pile and the casing.

3. The wedge member for staking as defined in claim 2, wherein, The gap surface forms a stress concentration area, and during the rotation of the casing, the stress concentration area generates concentrated stress that causes damage.

4. The wedge member for staking as defined in claim 3, wherein, The gap surface is an inclined structure, and the inclined surface forms an acute angle with the cast-in-place pile.

5. The wedge member for staking as defined in claim 4, wherein, The stake-clamping part also includes an extension part formed by a partial extension of the assembly part, the inclined surface of which is inclined toward the extension part and overlaps with the end of the extension part.

6. The wedge member for staking as defined in claim 1, wherein, Several vent holes are formed on both the assembly part and the stake part.

7. The wedge member for staking as defined in claim 1, wherein, The assembly part is located above the piling part, and the projection formed by the assembly part covers the projection formed by the piling part.

8. The wedge member for staking as defined in claim 7, wherein, The length of the assembly part is at least twice the length of the piling part.

9. A wedge member for use in staking as defined in any one of claims 1-8, characterized in that The assembly part is provided with a lifting hole, which is in the same direction and / or perpendicular to the length direction of the piling part. When the lifting hole is perpendicular, it is located at both ends of the assembly part, respectively, along with the piling part.

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