考虑人车安全的地表与管线沉降监测方法改进研究

Improved Monitoring Method for Ground and Pipeline Settlements Based on Pedestrian-Vehicle Safety

地表与管线沉降是基坑监测的重要内容。目前沉降监测标多采用地面开孔后覆盖保护盖的做法,其孔洞可以容纳标尺以方便作业;但是保护盖需要制作、安装、维护,不仅提高了监测成本,而且一旦脱落或丢失都可能威胁行人或车辆安全。本文对监测标制作方法进行了改进,采用加长杆进行间接测量,从而实现减小孔径、免去保护盖的目标;对改进型监测方法与传统方法开展了对比实验,测试了新方法的监测精度和效率,评估了其安全性。研究结果表明:新方法能够满足规范要求,可降低成本、提高监测效率。

The important part of foundation pit monitoring is the ground and pipeline settlement.The present practice of settlement monitoring is holing the road and covering the protective caps,yet although the holes in the roads could be made to accommodate the vertical measuring rulers in the settlement monitoring, the protective caps made, installed and maintained result in the increase in the monitoring cost and may cause danger to the pedestrians and the vehicle if caps are stolen or damaged. In this paper, an indirect measurement method in which no protective cap is needed is proposed. By using an extension rod, the measurement rulers do not need to be inserted into the holes. Therefore, holes can be made only with the diameter of 50-60 mm. Such small holes in the ground and roads are safe to the pedestrians and the vehicle. Several onsite experiments were conducted. The results show that the new method can meet the specification requirements, reduce the cost and improve the monitoring efficiency.