长江三级阶地超深基坑工程的应用与分析

Application and analysis of ultra-deepfoundation pit in the third terrace of the yangtze river

基于武汉建工科技中心基坑工程的施工情况和监测成果,对长江三级阶地剥蚀堆积垄岗地貌单元超深基坑采用单排桩+单层混凝土内支撑进行了探讨研究。通过实测数据可知:三级阶地基坑开挖实际情况与计算结果较为吻合,但必须同步考虑因地质条件变化带来的层间水及下部承压水对土体的软化作用。

Based on the construction and monitoring results of the foundation pit project of Wuhan Construction Engineering Science and Technology Center,the use of single row piles and single layer concrete internal support for ultra-deep foundation pit of the third terrace denudation accumulation ridge geomorphic unit of the Yangtze River is studied.It can be seen from the measured data that the actual situation of the excavation of the third terrace foundation pit is more consistent with the calculation,but the softening effect of the interlayer water and the lower confined water on the soil mass due to the change of geological conditions must be considered simultaneously.