膨胀土地区深基坑周边地表环境监测分析

Monitoring Analysis of the Surrounding Surface Environment of the Deep Foundation Pit in the Expansive Soil Area

对周边地表环境监测进行统计分析,其中坡顶水平位移的累计位移变化量最大值超过警报值,分析原因并利用降水卸荷的方法减小变形。八个月之后,周边地表环境的各项监测变形趋于稳定。通过监测数据分析,各监测项目具有明显的同步性,累计位移遵循"先大后小",变化速率遵循"先快后慢"的规律。

Through the surrounding deep foundation pit statistical analysis of the monitoring results, it found that expansive soil moisture content change and construction process will directly affect the ground environment, the maximum value of the cumulative displacement of slope horizontal displacement exceeds the alarm value, the cause was analyzed to decrease deformation by unload the precipitation. After 8 months, the monitoring of surface deformation tends to be stable, the monitoring project has obvious syn- chronization. The cumulative displacement follow the rules ＂from big to small＂, the rate of change follow the rules ＂from fast to slow＂.