北京地铁下穿运河区间地下水流速流向测试  

Test of Groundwater Velocity and Flow Direction in Rivercrossing Section of Beijing Metro

作　　者：张昊[1] 敖松 刘俊洋 

机构地区：[1]北京市轨道交通建设管理有限公司,北京高级工程师100068 [2]北京中煤矿山工程有限公司,北京100013 [3]中铁六局集团有限公司,北京100036

出　　处：《城市轨道交通研究》2016年第7期27-29,34,共4页Urban Mass Transit

基　　金：北京市科技计划项目(Z151100002815023)

摘　　要：地下水流速和流向会影响冻结工程施工效果。以北京地铁6号线下穿运河区间2#联络通道冻结工程为背景,针对地层渗透性强、地层扰动大、河水补给充足,以及周边基坑降水平行施工等复杂条件,采用钻孔勘察和AquaVISION测试仪测试的方法,开展了地下水流速流向现场测试,得到了联络通道处地层地下水流特征数据：流速为11.00～14.00m/d,流向为北偏道东46°。给出了该联络通道冻结设计和施工时的注意事项。Metro freezing construction could be affected by ground water velocity and flow direction.Based on the freezing construction of 2# connecting passage in river-bed crossing section of Beijing metro Line 6,by using borehole investigation and AquaVISION testing device,the groundwater velocity and flow direction test is conducted in complex conditions,including the highly disturbed stratum with strong permeability,sufficient river water recharge and nearby parallel pumping construction of foundation pit.Test result shows that the velocity of the stratum varies from 11 to 14 m/d,and the flow direction is 46 degrees north by east.On this basis,suggestions are put forward for the related design and construction.

关 键 词：地铁区间 冻结法施工 地下水流速流向 测试 

分 类 号：U231.3[交通运输工程—道路与铁道工程]