合肥某建筑基坑变形监测分析

Monitoring and Analysis of Foundation Pit Deformation in Hefei

深基坑开挖会引起支护结构及周边应力状态变化,属于危险性较大工程。为确保基坑安全,必须对基坑进行变形监测。以某建筑基坑为例,结合基坑工程概况,制定了监测方案。通过对基坑水平位移、竖向位移、深层水平位移、周边管道沉降进行周期性监测和分析。结果表明:坡顶及桩顶水平位移、竖向位移、深层水平位移及周边管道沉降随着基坑的开挖不断增大,在基坑开挖到底时,变化速率最大,基础底板浇筑后,呈缓慢增长并趋于稳定。基坑监测结果能实时反应基坑状态及变化趋势,为保障信息化及安全施工提供了依据。

The excavation of deep foundation pit will cause the change of supporting structure and surrounding stress state,which is a dangerous project.In order to ensure the safety of foundation pit,deformation monitoring of foundation pit must be carried out.Taking the foundation pit of a building as an example,combined with the general situation of foundation pit engineering,the monitoring scheme is formulated.Through the foundation pit horizontal displacement,vertical displacement,deep horizontal displacement,the settlement of the surrounding pipeline is periodically monitored and analyzed.The results show that the slope top and pile top horizontal displacement,vertical displacement,deep horizontal displacement and surrounding pipe settlement increase with the excavation of the foundation pit,and the change rate is the largest when the foundation pit is excavated to the end,and the foundation floor increases slowly and tends to be stable after pouring.The monitoring results of foundation pit can reflect the state and changing trend of foundation pit in real time,which provides the basis for information and safety construction.