基坑变形监测及预警技术

Deformation monitoring and alerting technology of foundation pits

讨论基坑施工过程中变形监测的意义,根据国内现行规范、规程有关条文,结合区域经验,提出河南省基坑变形监测的建议项目,讨论基坑工程环境平面、剖面关系图、环境条件及施工工况、支护结构顶部水平位移、周围工程结构物沉降等项目的监测意义及成果表示方法;提出了基坑变形监测的预警指标。

Deformation monitoring and alerting technology is of great importance in the process of foundation pit excavation.Based on the monitoring items stipulated in the national codes, the provisions suitable for local features of Henan Province were suggested. Some key issues were discussed, such as the plan and section sketch of pit location, the excavation phase and water-table, the horizontal displacement of pit wall, the settlement of adjacent buildings and so on. Finally, the alerting thresholds were recommended to avoid pit wall collapse.