监测在深基坑支护工程中的应用

结合工程实例,对深基坑支护结构水平位移、基坑支护桩及外侧土体深层水平位移、支撑轴力和桩身应力、地下水位及沉降进行监测.针对基坑各施工阶段、部位采取不同的监测频率,给出了监测结果和相应的报警值.结果证明,支撑设计时应考虑温度效应,应监测桩及桩周土体深层水平位移以确保桩身安全,且地下水位累计下降量报警值应根据地质条件和周边环境设置.

Application of Monitoring in Deep Foundation Pit Supporting

Based on a deep foundation pit project,some parameters are monitored, including horizontal displacement of supporting structure,deep horizontal displacement of supporting piles and external soil,axial supporting force and piles stress,as well as groundwater level and settlements.Different monitoring frequencies are adopted in different construction stages and parts.Monitoring results and alarm values are given.By analyzing monitored results,some conclusions are summed up,such as temperature effect should be considered in supporting design,deep horizontal displacement of piles and surrounding soil should be monitored to keep piles safety,and alarm value of total settlement of groundwater level should be set according to geological conditions and surrounding environment.