郑州粉土地层地铁基坑地表沉降监测数据统计分析

Monitoring and Data Statistical Analysis of Zhengzhou Powder Soil Layer Metro Pit Surface Subsidence

深基坑工程的变形控制对周围环境至关重要,是地铁设计、施工、监测的主导因素,对其变形监测数据的分析显然具有重要的理论意义和应用价值。本文针对郑州粉土地层,以地铁2号线某站明挖基坑工程为研究背景,对其在施工过程中引起的地表沉降进行了实时监测分析,统计分析地表沉降的特点,并得出以下主要结论:1地层条件、施工工艺、环境因素对地表沉降有一定影响。2基坑锚索施工易引起地表沉降。

Deformation control of deep excavation engineering is crucial to the surrounding environment and it is the dominant factor of metro design,construction,and monitoring.Therefore,the data analysis of its deformation and monitoring has obviously important theoretical significance and application value. Aiming at the Zhengzhou powder soil layer,the paper takes a station of Metro Line 2 open-cut excavation engineering as the research background,real-time monitoring and analysis on the ground surface subsidence which is caused during construction were conducted,the characteristics of ground surface subsidence were summarized and the following main conclusions are reached ：（1）The formation conditions,construction technology,environmental factors have certain influence on the ground surface subsidence.（2） Anchor cable construction of foundation pit is easy to cause the surface subsidence.