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Device for increasing 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 for increasing the single-pile bearing capacity of an open prestressed high-strength concrete pipe pile. A sharp-bottom cross-shaped pile tip is welded with an annular steel plate, open pile sinking of the PHC pipe pile is guaranteed, a sand soil layer and a strong-medium weathered rock stratum can be conveniently penetrated, and the expanded annular steel plate is tightly connected with the pile end, so that the contact area of the pile end and a bearing layer is increased, and the pile end bearing force of the PHC pipe pile in the service state is increased. Rapid pile sinking is realized by a special pile tip system, the problem of difficulty in construction of a precast pile in a hard soil layer is solved while the single-pile bearing capacity is guaranteed, optimization design can be performed on a pile foundation, the purpose of reducing the construction cost is achieved, and economic benefits are obvious.
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，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。
Device for increasing 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 for increasing the single-pile bearing capacity of an open prestressed high-strength concrete pipe pile. A sharp-bottom cross-shaped pile tip is welded with an annular steel plate, open pile sinking of the PHC pipe pile is guaranteed, a sand soil layer and a strong-medium weathered rock stratum can be conveniently penetrated, and the expanded annular steel plate is tightly connected with the pile end, so that the contact area of the pile end and a bearing layer is increased, and the pile end bearing force of the PHC pipe pile in the service state is increased. Rapid pile sinking is realized by a special pile tip system, the problem of difficulty in construction of a precast pile in a hard soil layer is solved while the single-pile bearing capacity is guaranteed, optimization design can be performed on a pile foundation, the purpose of reducing the construction cost is achieved, and economic benefits are obvious.
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，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。
Device for increasing 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装置
YAN JUN (author) / HUANG YONGFENG (author) / XU HONGBING (author) / ZHANG MINGYI (author) / WANG ZHONGSHENG (author) / YAN NAN (author) / BAI XIAOYU (author) / ZHANG YAMEI (author) / JING DESHENG (author)
2021-07-02
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
| European Patent Office | 2021
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