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Construction method for foundation pile at excavation and filling junction
According to the excavation and filling junction foundation pile construction method, the construction mode of excavation and filling junction foundation piles is optimized, the foundation piles formed by combining spiral pile holes and common pile holes are adopted, soil around the foundation piles is remolded through screw piles, and old soil layers are connected with the screw piles through common piles; the safety problems of collapse, sinking and cracking of the pile body due to low hardness of the foundation in the filling area are eliminated, and the sealing performance of the foundation soil and the bearing capacity of the foundation pile in the filling area are improved; based on the moment balance theory of secondary extrusion and expansion, the problem that the hardness of soil in the excavation area and the filling area is not uniform is solved, the construction procedure and difficulty of the filling area are reduced, the foundation pile bearing capacity of the filling area is good, the economic benefit is improved, and the problems that cracks and differential settlement are prone to occurring at the excavation and filling junction in the direction perpendicular to the contour line are solved.
提供一种挖填交界处基础桩施工工法，通过优化挖填交界处基础桩的施工方式，采用螺旋桩孔和普通桩孔组合的基础桩，通过螺杆桩重塑基础桩周围土体，并通过普通桩将老土层与螺杆桩连接，消除了填方区地基硬度低而出现桩体塌方凹陷、裂缝的安全问题，提高了地基土的密封性和填方区基础桩的承载力；基于二次挤扩的力矩平衡理论，解决了挖方区和填方区土质软硬不均的问题，降低填方区施工工序和难度，填方区基础桩承载能力好，提高提高经济收益，解决了垂直于等高线的方向挖填交界处容易出现裂缝、不均匀沉降的问题。
Construction method for foundation pile at excavation and filling junction
According to the excavation and filling junction foundation pile construction method, the construction mode of excavation and filling junction foundation piles is optimized, the foundation piles formed by combining spiral pile holes and common pile holes are adopted, soil around the foundation piles is remolded through screw piles, and old soil layers are connected with the screw piles through common piles; the safety problems of collapse, sinking and cracking of the pile body due to low hardness of the foundation in the filling area are eliminated, and the sealing performance of the foundation soil and the bearing capacity of the foundation pile in the filling area are improved; based on the moment balance theory of secondary extrusion and expansion, the problem that the hardness of soil in the excavation area and the filling area is not uniform is solved, the construction procedure and difficulty of the filling area are reduced, the foundation pile bearing capacity of the filling area is good, the economic benefit is improved, and the problems that cracks and differential settlement are prone to occurring at the excavation and filling junction in the direction perpendicular to the contour line are solved.
提供一种挖填交界处基础桩施工工法，通过优化挖填交界处基础桩的施工方式，采用螺旋桩孔和普通桩孔组合的基础桩，通过螺杆桩重塑基础桩周围土体，并通过普通桩将老土层与螺杆桩连接，消除了填方区地基硬度低而出现桩体塌方凹陷、裂缝的安全问题，提高了地基土的密封性和填方区基础桩的承载力；基于二次挤扩的力矩平衡理论，解决了挖方区和填方区土质软硬不均的问题，降低填方区施工工序和难度，填方区基础桩承载能力好，提高提高经济收益，解决了垂直于等高线的方向挖填交界处容易出现裂缝、不均匀沉降的问题。
Construction method for foundation pile at excavation and filling junction
挖填交界处基础桩施工工法
FAN JUNRANG (author)
2024-05-24
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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