基坑竖向位移监测与地表沉降分析

Monitoring of Foundation Pit Vertical Displacement and Analysis on Surface Settlement

基坑工程作为一项综合性的工程项目,其质量好坏直接影响到后续的工程建设,最重要的影响因素就是岩土和地下水,二者带来了很多不确定性。通过对聊城公共交通集团调度中心工程基坑开挖过程中出现的土体渗流、沉降变形等问题的分析,并提出合理的解决方案,得出以下结论:软土地层止水帷幕不宜采用单轴搅拌桩;软土地层蠕动变形强烈,已施工锚杆易产生预应力损失,应随时检测,拉张补强。

The foundation pit works, as a comprehensive engineering project, its quality directly affects the subsequent con- struction ; the most important factors are geotechnieal and groundwater conditions, these two bring a lot of uncertainty. This paper analyzes soil seepage, settlement deformation and other issues during the excavation process of a foundation pit and puts forward a reasonable solution, it is concluded that uniaxial mixing pile is not suitable for waterproof curtain in soft soil ; the completed anchors, being easy to have pre-stress loss in soft soil with severe creep deformation, should be kept detec- ting and tensioned for reinforcement.