Anti-pulling composite pile anchor and using method thereof
By designing an anti-pull-out composite pile anchor, combined with a spiral bearing plate and a gravity cover plate, the problems of low bearing efficiency and poor anti-overturning capacity of traditional pile anchors are solved, achieving efficient multi-directional bearing and improved structural stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-20
- Publication Date
- 2026-04-07
AI Technical Summary
Traditional pile anchors have low bearing efficiency under vertical loads and poor overturning resistance under oblique loads. Furthermore, the pile body is prone to bending and failure, resulting in insufficient overall structural stability and safety.
A pull-out composite pile anchor is designed, combining the structures of pile anchor, gravity anchor, and helical anchor, with the addition of a helical bearing plate and a gravity cover plate. It is embedded into the seabed through vibratory pile driving, grouting, and bolt rotation, thereby improving the vertical bearing capacity and the oblique overturning resistance.
It improves the multi-directional bearing efficiency of pile anchors, enhances pull-out resistance, reduces the risk of pile bending failure, is highly economical, and is suitable for various geological conditions.
Smart Images
Figure CN121799546A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to pile anchors and installation methods thereof, in particular to a kind of anti-pulling composite pile anchor and its use method. BACKGROUND
[0002] From the technical and economic point of view, fixed foundation is mainly used in shallow water area, while floating structure is more inclined to be used in deep water and super deep water environment, and its cost performance and feasibility are more prominent. Moving towards deep sea puts forward more severe challenges to the mooring system of floating platform. The bearing capacity of traditional pile anchor mainly depends on the side friction of pile body under vertical load, which makes the bearing efficiency of pile anchor under vertical load lower. When inclined load is applied, the anti-overturning capacity of pile anchor is poor, and the pile body will be damaged by bending, which greatly reduces the stability and safety of the overall structure. SUMMARY
[0003] The present application aims at the deficiencies of the prior art, and provides an anti-pulling composite pile anchor and its use method. The anchor type combines the installation methods of pile anchor and gravity anchor and the stress characteristics of screw anchor. In terms of vertical bearing capacity, it is provided with a spiral bearing plate, which has better vertical bearing capacity than traditional pile anchor and more reliable performance. In terms of inclined bearing, the upper gravity anchor stock improves the anti-overturning capacity and can share part of the load, so that the pile body is less likely to be damaged by bending.
[0004] The present application adopts the following technical solutions: In a first aspect, an anti-pulling composite pile anchor is provided, comprising: a pile body; a vibrating pile pad fixed on the top of the pile body; an anchor eye point fixed on the top of the vibrating pile pad; a gravity cover plate fixed on the pile body, which is provided with a grouting cavity, a grouting hole, a drainage hole and a spiral anchor stock hole; a bolt installed on the spiral anchor stock hole for connecting the gravity cover plate to the seabed; a spiral bearing plate sleeved on the threaded end of the bolt.
[0005] Optionally, the pile body and the gravity cover plate are welded together.
[0006] Optionally, the anchor eye point is used for connecting anchor chain.
[0007] In a second aspect, a use method of the anti-pulling composite pile anchor is provided, which comprises: First, the vibration pile mat is connected with the vibration pile driver, the pile body is penetrated into the seabed through vibration pile driving, after the pile driving is completed, the seawater in the grouting cavity is discharged through the drainage hole, after the drainage is completed, the grouting cavity is grouted through the grouting hole, after the grouting is completed, the pile body and the gravity cover plate will be further embedded into the soil under the action of gravity, finally the spiral bearing plate is embedded into the seabed by rotating the bolt.
[0008] The beneficial effects of the present application are as follows: The present application is a composite structure of pile anchor, gravity anchor and spiral anchor, which has excellent vertical uplift resistance and oblique bearing capacity. The present application is provided with a cover plate which can enhance the overturning resistance and reduce the risk of bending damage of the pile body. The spiral bearing plate increases the bearing area of the device and greatly improves the uplift resistance. Compared with the traditional pile anchor, the present application has higher multi-directional bearing efficiency. Compared with the gravity anchor, the present application greatly improves the bearing efficiency and has higher bearing capacity under the same amount of steel. The spiral bearing plate of the present application provides additional uplift resistance as an auxiliary component of the pile anchor, has a smaller overall size and avoids the problem of difficult installation of large spiral anchors. The present application has simple structure and high economic efficiency, and can achieve excellent bearing performance under various geological conditions. BRIEF DESCRIPTION OF DRAWINGS
[0009] The accompanying drawings, which are incorporated into and form a part of the specification, illustrate an embodiment consistent with the present application and, together with the description, serve to explain the principles of the application.
[0010] Fig. 1 is a front view of an anti-uplift composite pile anchor provided by an embodiment of the present application.
[0011] Fig. 2 is a top view of an anti-uplift composite pile anchor provided by an embodiment of the present application.
[0012] In the drawings: 1, pile body; 2, vibration pile mat; 3, anchor eye point; 4, gravity cover plate; 5, grouting cavity; 6, grouting hole; 7, drainage hole; 8, anchor hole; 9, bolt; 10, spiral bearing plate. DETAILED DESCRIPTION
[0013] Hereinafter, exemplary embodiments will be described in detail.
[0014] As Figs. 1-2As shown, the anti-pulling composite pile anchor of the embodiment of the present application comprises a pile body 1, a vibrating pile pad 2, an anchor eye point 3, a gravity cover plate 4, a bolt 9, and a spiral bearing plate 10. The vibrating pile pad 2 is fixed on the top of the pile body 1 by welding. The anchor eye point 3 is fixed on the top of the vibrating pile pad 2, and is used for connecting an anchor chain. The gravity cover plate 4 is fixed on the pile body 1, and has a grouting cavity 5, a grouting hole 6, a drainage hole 7, and a rotating anchor hole 8 formed therein. The bolt 9 is installed on the rotating anchor hole 8, and is used for connecting the gravity cover plate 4 to the seabed. The spiral bearing plate 10 is sleeved on the threaded end of the bolt 9, and is used for providing additional anti-pulling performance.
[0015] The embodiment of the present application provides a use method of the anti-pulling composite pile anchor, and the method comprises the following steps: In the field construction, first, the vibrating pile pad 2 is connected with a vibrating pile driver, the pile body 1 is penetrated into the seabed through the vibrating pile driving, after the pile driving is completed, the seawater in the grouting cavity 5 is discharged through the drainage hole 7, after the drainage is completed, the grouting cavity 5 is grouted through the grouting hole 6, after the grouting is completed, the pile body 1 and the gravity cover plate 4 will be further embedded into the soil body under the action of gravity, and finally the spiral bearing plate 10 is embedded into the seabed by rotating the bolt 9.
[0016] In the engineering design, the device size needs to be optimized according to the soil parameters and the bearing requirements. When facing the soil with low strength and high bearing demand, the size of each part needs to be appropriately increased to ensure the ultimate bearing capacity of the device.
[0017] The present application is a composite structure of a pile anchor (i.e. the pile body 1), a gravity anchor (i.e. the gravity cover plate 4) and a spiral anchor (i.e. the bolt 9 and the spiral bearing plate 10), and has excellent vertical anti-pulling performance and oblique bearing capacity. The present application is provided with the gravity cover plate 4, which can enhance the anti-overturning capacity and reduce the risk of pile body bending damage. The spiral bearing plate 10 increases the bearing area of the device, greatly improves the anti-pulling capacity, and has higher multi-directional bearing efficiency compared with the traditional pile anchor. Compared with the gravity anchor, the present application greatly improves the bearing efficiency and has higher bearing capacity under the same amount of steel. The spiral bearing plate 10 of the present application provides additional anti-pulling performance as an auxiliary component of the pile anchor, has a smaller overall size, and avoids the problem of difficult installation of large spiral anchors. The present application has a simple structure and high economic efficiency, and can achieve excellent bearing performance under various geological conditions.
[0018] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with a true scope of the application being indicated by the following claims.
[0019] It is to be understood that the application is not limited to the precise construction already described above and shown in the drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope thereof.
Claims
1. A type of tension-resistant composite pile anchor, characterized in that, include: Pile body; Vibratory pile pads are fixed to the top of the pile body; Anchor points are fixed to the top of the vibratory pile pad; A gravity cover plate is fixed to the pile body, and it has a grouting cavity, grouting hole, drainage hole and anchor bolt hole. Bolts, installed on the bolt holes, are used to connect the gravity cover to the seabed; A spiral bearing plate, which is sleeved on the threaded end of the bolt.
2. The anti-pull-out composite pile anchor according to claim 1, characterized in that, The pile body is welded together with the gravity cover plate.
3. The anti-pull-out composite pile anchor according to claim 1, characterized in that, The anchor eye is used to connect the anchor chain.
4. The method of using the anti-pull-out composite pile anchor according to claim 1, characterized in that, The method includes: First, the vibratory pile pad is connected to the vibratory pile driver. The pile body is driven into the seabed by vibratory pile driving. After the pile driving is completed, the seawater inside the grouting cavity is discharged through the drainage hole. After the drainage is completed, the grouting cavity is grouted through the grouting hole. After the grouting is completed, the pile body and gravity cover plate will be further embedded into the soil under the action of gravity. Finally, the spiral bearing plate is embedded into the seabed by rotating the bolts.