基坑开挖对周边道路沉降影响分析

Analysis of Impact from Deep Foundation Pit Excavation on Peripheral Road Subsidence

针对深基坑开挖对周边道路变形的影响问题,以邯郸市某深基坑工程为例,对其现场原位监测数据进行分析探讨深基坑施工对周边道路沉降变形的影响规律。研究表明:基坑上部土体开挖引起的周边道路沉降位移约占总沉降位移的10%,中下部土体开挖引起的周边道路沉降位移约占总沉降位移的90%,基础底板浇筑与撤撑对周边道路沉降位移基本没有影响;基坑周边地表的附加荷载与车辆荷载是影响道路沉降的一个重要因素,不同方向道路沉降变形的发展过程存在一定的时间差异性。

In allusion to the issue of impact from deep foundation pit excavation on peripheral road deformation,taking a deep foundation pit project in the Handan City as an example carried out site in situ monitoring data analysis and then discussed the regular pattern of deep foundation pit construction impact on peripheral road subsidence deformation.The study has shown that the foundation pit upper part soil mass excavation caused peripheral road subsidence displacement accounts for about 10%in total subsidence displacement,while middle and lower part soil mass excavation caused about 90%.Foundation floor cementing and support withdrawal are basically without impact on peripheral road subsidence displacement.Foundation pit surface additional load and vehicle load are road subsidence important impact factors,different direction roads subsidence deformation development processes exist certain temporal differential.