饱和软黄土高水位地区深基坑钢支撑轴力监测与分析

Monitoring and Analysis of the Axial Force of Steel Support for Deep Foundation Excavation in Saturated Soft Loess with High Water Level

西安地铁6号线东兴区间竖井深基坑紧邻兴庆湖,处于西安饱和软黄土的发育核心区域,因此深基坑工程支护结构既是工程的关键也是重难点。利用有限元软件对深基坑组合支撑轴力进行预分析,结合现场监测数据进行对比,分析了深基坑施工过程中支撑轴力的动态变化趋势以及轴力异常原因,并对深厚软黄土地区深基坑开挖提出施工建议。

The deep foundation excavation of the shaft in Dongxing section of Xi'an Metro Line 6 is close to Xingqing Lake and located in the core area of saturated soft loess development in Xi'an.Therefore,the supporting structure of the deep foundation excavation project is both the key and the difficult part of the project.In this paper,the finite element software is used to pre-analyze the axial force of deep foundation excavation,and the dynamic change trend of the axial force and the reasons for the abnormal axial force are analyzed by comparing the monitoring data in the field,and some construction suggestions for the deep foundation excavation in deep soft loess area are put forward.