软土地区深基坑监测技术项目实例分析

Case analysis of deep foundation pit monitoring technology projects in soft soil area

基坑监测是在基坑工程施工过程中对基坑进行实时监测,了解施工作业中土体、地下水位、周边环境等条件的变化情况,并根据监测反馈的结果,从而来指导设计和施工,一旦出现危险信号便可及时做出应对措施并调整基坑设计施工方案,保障施工作业的安全。结合软土地区具体基坑工程,通过对深层土体水平位移、地下水位、地表沉降、周边道路及建筑沉降、立柱沉降、钢和混凝土支撑轴力进行监测。监测数据显示,基坑的开挖给土体位移、地下水位和周边环境带来了一定的影响,但各监测项目的观测数据在监测周期内均在设计预警值内。

Foundation pit monitoring is the real-time monitoring of the foundation pit during the construction process of the foundation pit project,to understand the changes in soil,groundwater level,surrounding environment and other conditions during construction operations.Based on the results of monitoring feedback,it can guide design and construction.Once danger signals appear,timely response measures can be taken and the foundation pit design and construction plan can be adjusted to ensure the safety of construction operations.Specific foundation pit projects in soft soil areas was combined to monitor the horizontal displacement of deep soil,groundwater level,surface settlement,surrounding road and building settlement,column settlement,and steel and concrete support axial force.The monitoring data shows that the excavation of the foundation pit has had a certain impact on soil displacement,groundwater level,and the surrounding environment.However,the observation data of each monitoring project is within the design warning value during the monitoring period.