郑州市轨道交通基坑工程变形特性的分析与研究

Deformation Characteristics Analysis and Research of Foundation Pit Related to the Urban Rail Transit in Zhengzhou

通过对郑州市轨道交通1号线和2号线一期20个车站基坑的变形监测资料进行统计分析,以基坑深度为依据,分别研究了不同风险等级基坑的地表沉降、桩(墙)顶水平位移和桩(墙)体水平位移情况;明确了各监测项目的实测值分布形态,并给出了实测数据的数理统计结果;分析了桩(墙)体水平位移最大值出现的位置,明确了基坑深度对最大值位置的影响,并着重对该地区基坑工程的变形规律进行了分析研究。研究成果可指导后续郑州地区基坑工程变形控制工作的开展,也可为类似地区基坑工程建设提供借鉴。

Statistical analysis of the deformation monitoring data of 20 station pits, from Zhengzhou urban rail transit line 1 and first phase line 2 are given in this paper, The pit risk grade is divided by the depth, and the monitoring projects of ground settlement, top horizontal displacement of pile （wall） and body horizontal displacement of pile （wall） are studied. The measured values distribution of each monitoring project is defined, and the mathematical statistics results of the measured data are given. The maximum value position of body horizontal displacement of pile （wall） is taken, and the influence of foundation pit depth is studied. The deformation law of foundation pit engineering is especially analyzed in this area. The research achievement may give important guidance to the deformation control of foundation pit engineering in Zhengzhou, and it can also be used for reference engineering in similar area.