基坑开挖对抗拔桩影响的原位桩检测分析

In-situ pile detection and analysis of excavation of foundation pit against the influence of uplift piles

基于基坑开挖不可避免地引起地基应力场变化,导致桩—土接触面法向应力发生改变,从而降低抗拔桩承载力,对抗拔桩的变形也产生影响的情况,通过地表和不同开挖深度位置进行原位桩静载荷抗拔试验,对沈阳砂土地区抗拔桩在不同深度时的承载性能进行了原位检测分析,得出了一些有意义的结论。

Excavation of foundation pit can inevitably cause foundation stress field changes and then lead the normal stress of pile-soil interface changes,so as to reduce the bearing capacity of uplift pile and influence the deformation of tension piles. In this essay will detect and analyze the load-carrying properties of uplift pile which at different depth in the sandy region of Shenyang through the test of in-situ pile static load pull-out at the surface and different excavation depth position,some meaningful conclusions are drawn.