摘要
以北京地铁6号线某区间隧道旁通道冻结法施工为背景,研究在复杂条件下采用常规冻结设计和施工遇到的冻结壁较长时间不交圈问题,提出了冻结壁不交圈的检测判断方法,分析了冻结壁不交圈的地质与环境影响因素。通过对地下水水位、流速和流向的工程测试,得出了大流速是影响冻结壁正常交圈的直接原因,最后采取双排管加强冻结和注浆改变土体渗透性的方法成功解决了大流速中砂夹圆砾地层中冻结壁交圈问题。
Based on the background of freezing construction on a contact passage adjacent to a tunnel in Beijing Metro Line 6,unclosed problem of freezing wall for long time was discussed with normal design and construction under complex conditions. The method of detecting the unclosed or closed frozen wall was proposed and the factors of geology and environment to unclosed frozen wall were analyzed. Large flow velocity was the direct cause of the unclosed freezing wall by the engineering test of level,flow rate and direction of groundwater flow. And then,the problem of freezing wall intersection in large velocity sand pebble stratum was solved successfully with the double row pipe strengthening freezing and changing the soil permeability by grouting method.
出处
《工业建筑》
CSCD
北大核心
2015年第11期187-190,共4页
Industrial Construction
基金
北京市科技计划项目(Z151100002815023)
关键词
冻结法
旁通道
交圈
大流速
freezing method
contact passage
closed frozen wall
large flow velocity
