地铁联络通道冻结施工中渗漏影响的数值分析  

Analysison Influence of Seepage in a Cross Passage on Frozen Walls by Numerical Simulation Method

作　　者：李大勇[1] 曹立雪[1] 李健 

机构地区：[1]山东科技大学土木建筑学院土木工程防灾减灾重点实验室,山东青岛266510 [2]青岛港集团建港指挥部,山东青岛266011

出　　处：《地下空间与工程学报》2012年第1期111-115,121,共6页Chinese Journal of Underground Space and Engineering

基　　金：山东省"泰山学者"建设工程专项资助;山东省自然科学基金资助项目(ZR2009FM003);教育部留学回国人员科研启动基金资助

摘　　要：为了掌握地铁联络通道冻结施工过程中,冻土帷幕不同位置发生渗漏时,渗流场和位移场的变化规律,以南京地铁二号线莫愁湖站～汉中门站区间联络通道及泵房水平冻结法施工为研究背景,采用有限元数值方法,对冻土帷幕中渗漏分别发生在拱顶、拱角、底角处的三种情况进行模拟,研究了渗流对冻土结构的影响,即渗流场、垂直位移场、水平位移场及地表变形分析,得出对渗漏点进行加固的最低期限,避免由此产生的工程事故,为联络通道冻结法施工提供理论依据。During the course of freezing construction of a cross passage in subway, the laws of the seepage field variation and displacement field can be acquired when the seepage happened through different positions of frozen soil curtains. This study is based on the construction of cross passage and pump room of No. 2 line of Nanjing metro in section between Mochouhu and Hanzhongmen Stations. Numerical simulation of freezing construction with an existing seepage point in arch crown, the corner of passage arch and the corner of passage bottom is carried out. The influence of seepage on the frozen walls is studied, that is, the seepage field and displacement field are analyzed and the appro- priate duration to eliminate the seepage is determined. The results are in good agreement with the monitoring and can be used to guide the construction.

关 键 词：联络通道 冻结法 渗漏 数值模拟 

分 类 号：TU752[建筑科学—建筑技术科学]