武汉地区富含水地层联络通道冻结法施工数值计算分析

摘要

Based on the cross passage project between running tunnels from Fanhan Station to Hankou Railway Station in Wuhan area,the paper studied the key freezing techniques for the cross passage in aquifer. By means of ANSYS and three-dimensional model, the effect of frost swelling on frozen soil mass during the freezing under confined water condition was analyzed. The impact of the mining bored tunnels and a pumping station on frozen soil curtain was also studied. Results showed that the force-bearing capacity of frozen soil curtain was safe both in freezing process and excavation.%文章以武汉地区范虎站一汉口火车站区间联络通道为工程背景,重点研究了采用冻结法在武汉富含水地层中修建联络通道的关键施工技术.借助ANSYS通用有限元软件,通过建立三维模型,分析了承压水条件下联络通道冻结过程中冻胀对冻土体的影响,以及暗挖隧道和泵站开挖对冻土帷幕的影响.分析结果表明:本工程无论是在冻结施工过程还是开挖过程中,冻结帷幕的受力都处于安全状态.