A method for reducing pile slippage during sinking of a large steel pipe pile
By arranging geonets at intervals on the inner wall of steel pipe piles, additional damping force is provided to suppress pile slippage, solving the problem of frequent pile slippage in offshore wind farms, improving construction safety and accuracy, and making it suitable for different geological conditions.
CN122280158APending Publication Date: 2026-06-26FUJIAN PROVINCIAL INVESTIGATION DESIGN & RES INST OF WATER CONSERVANCY & HYDROPOWER
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Patent Information
- Application Number
- CN202610722289.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-05-25
- Publication Date
- 2026-06-26
AI Technical Summary
Technical Problem
In offshore wind farms, the phenomenon of pile slippage during the driving of steel pipe piles is frequent, leading to safety accidents and construction difficulties, which are difficult to control effectively with existing technologies.
Method used
Three to five layers of geonet are arranged vertically along the inner wall of the steel pipe pile. By calculating the resistance of each layer of geonet and selecting an appropriate geonet type and fixing method, additional damping force is provided to suppress pile slippage.
Benefits of technology
It effectively slows down the sinking speed of the pile, reduces the risk of safety accidents, ensures construction safety and accuracy, reduces economic losses, and is suitable for different geological conditions.
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Smart Images
Figure CN122280158A_ABST
Abstract
This invention belongs to the field of steel pipe pile driving technology, specifically relating to a method for reducing pile slippage during the driving of large steel pipe piles. The method involves arranging 3-5 layers of geogrid along the vertical direction on the inner wall of the steel pipe pile, with a spacing of 6-10m between adjacent geogrids and a distance of 6-10m between the lowest geogrid and the lower end face of the steel pipe pile. By setting geogrids on the inner wall of the steel pipe pile, the additional resistance provided by the geogrids effectively slows down the pile's penetration speed, inhibits the continued acceleration of pile slippage, and thus reduces the risk of major safety accidents such as severe shaking of the hammer system, instability of the crane vessel, wire rope breakage, or even the hammer falling into the sea due to uncontrolled rapid sinking of the pile. This significantly improves the safety of construction personnel and equipment.
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