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A platform for research: civil engineering, architecture and urbanism
Method for improving single-pile bearing capacity of open prestressed high-strength concrete pipe pile
The invention belongs to the technical field of foundation engineering, and relates to a device and method for improving the single-pile bearing capacity of an open prestressed high-strength concrete pipe pile. A pointed-bottom cross-shaped pile tip is welded to an annular steel plate, the PHC pipe pile is subjected to open pile sinking, and a sand layer and a strong-medium weathered rock layer can be conveniently penetrated; the expanded annular steel plate is tightly connected with the pile end, the contact area between the pile end and a bearing stratum is increased, and the pile end bearing force of the PHC pipe pile in the service state is improved; and rapid pile sinking is achieved through a special pile tip system, the problem that a prefabricated pile is difficult to construct in a hard soil layer is solved while the single-pile bearing capacity is guaranteed, a pile foundation can be optimally designed, the purpose of reducing the engineering cost is achieved, and the economic benefits are remarkable.
本发明属于基础工程技术领域，涉及一种提高敞口预应力高强度混凝土管桩单桩承载力的装置及方法，采用尖底十字型桩尖与环形钢板焊接，保证PHC管桩开口沉桩，便于穿透砂土层和强‑中风化岩层，通过扩大的环形钢板与桩端紧密连接，增大桩端与持力层的接触面积，提高PHC管桩服役状态的桩端支承力；特殊的桩尖体系实现了快速沉桩，在保证单桩承载力的同时，解决了预制桩在硬土层施工困难的问题，能够对于桩基础进行优化设计，达到降低工程造价的目的，经济效益显著。
Method for improving single-pile bearing capacity of open prestressed high-strength concrete pipe pile
The invention belongs to the technical field of foundation engineering, and relates to a device and method for improving the single-pile bearing capacity of an open prestressed high-strength concrete pipe pile. A pointed-bottom cross-shaped pile tip is welded to an annular steel plate, the PHC pipe pile is subjected to open pile sinking, and a sand layer and a strong-medium weathered rock layer can be conveniently penetrated; the expanded annular steel plate is tightly connected with the pile end, the contact area between the pile end and a bearing stratum is increased, and the pile end bearing force of the PHC pipe pile in the service state is improved; and rapid pile sinking is achieved through a special pile tip system, the problem that a prefabricated pile is difficult to construct in a hard soil layer is solved while the single-pile bearing capacity is guaranteed, a pile foundation can be optimally designed, the purpose of reducing the engineering cost is achieved, and the economic benefits are remarkable.
本发明属于基础工程技术领域，涉及一种提高敞口预应力高强度混凝土管桩单桩承载力的装置及方法，采用尖底十字型桩尖与环形钢板焊接，保证PHC管桩开口沉桩，便于穿透砂土层和强‑中风化岩层，通过扩大的环形钢板与桩端紧密连接，增大桩端与持力层的接触面积，提高PHC管桩服役状态的桩端支承力；特殊的桩尖体系实现了快速沉桩，在保证单桩承载力的同时，解决了预制桩在硬土层施工困难的问题，能够对于桩基础进行优化设计，达到降低工程造价的目的，经济效益显著。
Method for improving single-pile bearing capacity of open prestressed high-strength concrete pipe pile
一种提高敞口预应力高强度混凝土管桩单桩承载力的方法
LIU HONGHUA (author) / BAI XIAOYU (author) / WANG ZHONGSHENG (author) / ZHANG MINGYI (author) / JIA SHIXIANG (author) / YAN NAN (author) / WANG YONGHONG (author) / HUANG YONGFENG (author) / JING DESHENG (author)
2021-07-02
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
| European Patent Office | 2021
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