地铁暗挖隧道下穿电缆隧道扰动影响及安全距离研究  

Research on the Disturbance Influence Law and Safety Distance of the Cable Tunnel Induced by the Construction of the Underground Subway Tunnel

作　　者：王泽朋 马耀坛 刘浩 韩现民 李乾 WANG Zepeng;MA Yaotan;LIU Hao;HAN Xianmin;LI Qian(China Construction Eighth Bureau Testing Technology Co.,Ltd.,Beijing 102488,China;School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Shijiazhuang Power Supply Branch,State Grid Hebei Electric Power Co.,Ltd.,Shijiazhuang 050000,China)

机构地区：[1]中建八局检测科技有限公司,北京102488 [2]石家庄铁道大学土木工程学院,河北石家庄050043 [3]国网河北省电力有限公司石家庄供电分公司,河北石家庄050000

出　　处：《粉煤灰综合利用》2024年第6期89-95,共7页Fly Ash Comprehensive Utilization

摘　　要：针对地铁暗挖隧道垂直、斜下45°平行侧穿电缆隧道两种常见工况,采用数值模拟仿真手段,研究了不同净距下,地铁隧道施工对不同截面尺寸电缆隧道变形与受力扰动影响规律。在此基础上,通过对电缆隧道环、纵向安全系数的检算,得到两隧道净距与电缆隧道二次衬砌结构最小安全系数关系曲线,并依据二次衬砌安全系数控制指标,确定相应安全保护距离。结果表明:垂直下穿引起电缆隧道结构的沉降和拉应力值要高于斜下侧穿工况;两种下穿工况下,隧道净距与电缆隧道二次衬砌最小安全系数皆近似呈线性增加关系;相同计算条件下垂直下穿的安全净距大于斜下45°平行侧穿工况。In this paper,the influence of subway tunnel construction on the deformation and stress disturbance of cable tunnel with different section sizes is studied by means of numerical simulation for two common working conditions of underground tunnel with vertical and 45°down slope.On this basis,the relationship curve between the distance between two tunnels and the minimum safety factor of the secondary lining structure of the cable tunnel is obtained by checking the ring and longitudinal safety factor of the cable tunnel,and the corresponding safety protection distance is determined according to the control index of the secondary lining safety factor.The results show that the settlement and tensile stress of the cable tunnel structure caused by vertical underpass are higher than those under inclined underpass condition.The distance between the tunnel and the minimum safety factor of the secondary lining of the cable tunnel are linearly increased under both conditions.Under the same calculation conditions,the safety distance of vertical underpass is greater than that of parallel underpass 45°.

关 键 词：电缆隧道 暗挖隧道 数值模拟 安全系数 安全距离 

分 类 号：U231.3[交通运输工程—道路与铁道工程]