扭桩用套筒装置
By using a sleeve device for twisted piles with a cutting mechanism and wedges, the problem of insufficient friction of the full-rotation sleeve is solved, enabling effective destruction and torsion of the pile foundation, reducing pile extraction resistance, maintaining pile foundation stability, and providing an easier removal method.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CCCC THIRD HARBOR ENGINEERING CO LTD
- Filing Date
- 2025-07-22
- Publication Date
- 2026-07-17
AI Technical Summary
When used alone, the existing full-rotation sleeve has low friction, resulting in weak torsional force on the pile foundation, making it difficult to effectively damage or tilt the pile foundation.
A sleeve device for twisted piles with a cutting mechanism and wedges is used. The connection between the pile foundation and the soil layer is loosened by rotating the sleeve. The wedges are inserted into the gap between the sleeve and the pile foundation and apply torque. Combined with a monitoring mechanism and a pressurizing mechanism, the pile foundation is destroyed and twisted.
It effectively reduces pile extraction resistance, maintains pile foundation stability, and achieves pile foundation failure and torsion fracture through stress concentration, providing an easier removal method.
Smart Images
Figure CN224514210U_ABST
Abstract
Claims
1. A sleeve device for a twist pile, characterised in that, It includes a sleeve with at least two sleeves, and a cutting mechanism is formed at the bottom of the sleeve; It also includes a wedge that fits against the side wall of the sleeve. The wedge is connected to the hoisting equipment and drives the sleeve to rotate. After the sleeve enters the set height of the existing pile foundation, the connection between the pile foundation and the surrounding soil layer loosens. The wedge enters between the pile foundation and the sleeve. As the sleeve continues to rotate, the wedge is driven by the rotation of the sleeve, generating a torsional force that twists the pile foundation.
2. A sleeve device for a twist piling according to claim 1, characterized in that It also includes a rotating mechanism equipped with a monitoring device, the rotating mechanism forming a enclosure cavity, and the portion of the sleeve exposed from the existing pile foundation is located within the enclosure cavity.
3. A sleeve device for a twist piling according to claim 2, characterized in that The sleeve is located inside the enclosure cavity, and the sleeve rotates the pile foundation from top to bottom.
4. The sleeve device for a twist piling according to claim 1, characterized in that, A support portion is formed at the top of the pile foundation, and an overlapping portion is formed at the bottom of the wedge block away from the inner wall of the sleeve, with the overlapping portion overlapping the support portion.
5. The sleeve device for a twist piling according to claim 1, characterized in that, The bottom of the wedge has a guide portion, which generates a guiding torque from top to bottom from the pile foundation to the casing.
6. The sleeve device for a twist piling according to claim 1, characterized in that, The sleeve is a fully rotatable sleeve, and the fully rotatable sleeve is bolted to an extension sleeve that forms an extension sleeve.
7. A sleeve device for a twist piling according to claim 6, characterized in that The wedge is in contact with the inner wall of the bottommost part of the extended sleeve, and the wedge is located in the lower middle part of the sleeve.
8. The sleeve device for a twist piling according to claim 1, characterized in that, The cutting mechanism includes a plurality of rotating cutter teeth arranged circumferentially along the bottom of the innermost sleeve.
9. A sleeve device for a twist piling according to claim 8, characterized in that Between the lower middle part and the bottom of the innermost sleeve, a number of rotating cutter teeth are provided, and the number of rotating cutter teeth form an arc-shaped auxiliary cutting trajectory.
10. The sleeve device for a twist piling according to claim 1, characterized in that, The sleeve is used for the construction of sleeves with a length of 1-2m. The maximum upward pull force of the sleeve is 3450kN and the maximum downward force is 590kN+250kN.