富水圆砾地层中地下连续墙施工技术研究

Study on Construction Technology of Underground Diaphragm Wall in Water-rich Gravel Stratum

富水圆砾地层分布厚度较大、透水性强、自稳性差,可能导致连续墙施工塌孔、不利成槽等困难。为了保证工程的稳定性,文章以呼和浩特市地铁2号线04标段富水圆砾地层中地下连续墙施工为背景,开展富水圆砾地层中地下连续墙的施工技术研究,总结出现的问题和解决方法,结合实际工程的监测数据与数值模拟结果进行对比分析,表明数值模拟结果和实际较接近,并提出了在富水圆砾地层中施工地下连续墙的技术特点。

The water-rich pebble stratum is characterized by a large distribution thickness,high permeability and poor stability,which may lead to the collapse of the underground diaphragm wall during construction and unfavorable conditions for trenching.In order to ensure the stability of the project,a construction project of underground diaphragm wall in water-rich pebble stratum is taken as an example.The construction site is in the lot 4 of Metro line 2 in Hohhot city,and the problems and corresponding solutions are summarized.The monitoring data obtained from the project are compared with the results of numerical simulation.The results show that the numerical results agree well with the monitored values;the technical aspects of construction of the underground diaphragm wall in water-rich pebble stratum are revealed.