膨胀抗拔桩施工技术
发布时间：2018-10-24 12:04
【摘要】：为了有效提高软弱持力层地区预制抗拔桩土体抗拔承载力,采用膨胀抗拔桩静压、接桩、送桩、张拉、膨胀、注浆施工工艺,能有效实现桩尖周边土体挤密、桩端锚塞、摩阻增大目的,对改善桩身抗裂、接桩强度和整体抗拔力有明显功效,从根本上提升软土地区预制抗拔桩结构性能和设计单桩抗拔承载力,在相同单桩抗拔承载力条件下能有效减少桩数、缩短桩长、控制不均匀沉降变形,节约抗拔桩设计及施工成本30%~35%。
[Abstract]:In order to effectively improve the uplift bearing capacity of prefabricated uplift pile soil in weak bearing layer, the construction technology of static pressure, connecting pile, feeding pile, tensioning, expanding and grouting can effectively realize the compaction of the soil around the pile tip and the anchor plug at the end of the pile. The increase of frictional resistance has obvious effect on improving pile body crack resistance, connecting pile strength and overall pull-out strength. It can fundamentally improve the structural performance of prefabricated uplift piles in soft soil area and design the uplift bearing capacity of single pile. Under the condition of the same uplift bearing capacity, the pile number can be reduced effectively, the pile length can be shortened, the uneven settlement and deformation can be controlled, and the design and construction cost of the uplift pile can be saved.
【作者单位】： 上海智富建设工程有限公司;
【分类号】：TU753.3
[Abstract]:In order to effectively improve the uplift bearing capacity of prefabricated uplift pile soil in weak bearing layer, the construction technology of static pressure, connecting pile, feeding pile, tensioning, expanding and grouting can effectively realize the compaction of the soil around the pile tip and the anchor plug at the end of the pile. The increase of frictional resistance has obvious effect on improving pile body crack resistance, connecting pile strength and overall pull-out strength. It can fundamentally improve the structural performance of prefabricated uplift piles in soft soil area and design the uplift bearing capacity of single pile. Under the condition of the same uplift bearing capacity, the pile number can be reduced effectively, the pile length can be shortened, the uneven settlement and deformation can be controlled, and the design and construction cost of the uplift pile can be saved.
【作者单位】： 上海智富建设工程有限公司;
【分类号】：TU753.3
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