Project Overview: The subway station foundation pit is 200m long, 25m wide, and excavated to a depth of 15m.. The site is located in a water rich sand layer area with abundant groundwater, which has a significant impact on the stability of the foundation pit.
Monitoring content:
Water level monitoring: Adopting a water level gauge automatic monitoring system, real-time monitoring of changes in groundwater level inside and outside the foundation pit..
Soil pressure monitoring: Install soil pressure gauges between the enclosure structure and the soil to monitor changes in soil pressure..
Support axial force monitoring: Automated monitoring of the support axial force inside the foundation pit, using an axial force meter to collect real-time data..
The automated monitoring system consists of sensors, data acquisition and transmission equipment, and a remote monitoring platform.. Sensors transmit monitoring data to data collection and transmission devices, and then transmit it to remote monitoring platforms through the network, achieving 24-hour real-time monitoring.
Monitoring result analysis: Monitoring data shows that during the dewatering process of the foundation pit, the groundwater level outside the pit drops significantly, with a maximum decrease of 5 meters.. By adjusting the precipitation plan and adding recharge wells, the impact of groundwater level decline on the surrounding environment has been effectively controlled. At the same time, the monitoring data of the supporting axial force shows that when the excavation of the foundation pit reaches the bottom, some of the supporting axial forces are close to the design value, and timely strengthening measures have been taken to ensure the safety of the foundation pit.
