考虑非饱和土渗流的隧道塌方机理分析及注浆加固对策  

Analysis of tunnel collapse mechanism and grouting reinforcement measures under the unsaturated seepage effect

作　　者：杨钊[1,2,3,4] 任梦 黄威 袁青 YANG Zhao;REN Meng;HUANG Wei;YUAN Qing(CCCC Second Harbor Engineering Co.,Ltd.,Wuhan,Hubei 430013,China;Key Laboratory of Large-Span Bridge Construction Technology,Wuhan,Hubei 430014,China;Research and Development Center of Transport Industry of Intelligent Manufacturing Technologies of Transport Infrastructure,Wuhan,Hubei 430014,China;CCCC Highway Bridge National Engineering Research Centre Co.,Ltd.,Wuhan,Hubei 430014,China)

机构地区：[1]中交第二航务工程局有限公司,湖北武汉430013 [2]长大桥梁建设施工技术交通行业重点实验室,湖北武汉430014 [3]交通运输行业交通基础设施智能制造技术研发中心,湖北武汉430014 [4]中交公路长大桥建设国家工程研究中心有限公司,湖北武汉430014

出　　处：《中国港湾建设》2022年第1期11-15,共5页China Harbour Engineering

摘　　要：以哈尔滨市轨道交通3号线松江生态园站—进乡街站区间为背景,基于非饱和土体渗流及强度理论,着重研究了渗流对隧道变形及稳定性的影响,深入分析了渗流作用下的隧道塌方机理,并给出了针对性的塌方处置措施。分析结果表明:地表渗漏引起的非饱和土体强度衰减,隧道上方土体塑性区发育,是导致隧道塌方的主要原因;针对地表渗流引起的塌方,通过堆载反压控制隧道塌方发展、改善土体饱水软化的情况、改良加固强度弱化土体等处治措施,有效解决了塌方险情。Taking the section from Songjiang Ecological Park Station to Jinxiang Street Station of Harbin Metro Line 3 as the background,based on the unsaturated soil seepage and strength theory,the influence of seepage on tunnel deformation and stability was studied,the mechanism of tunnel collapse under seepage was deeply analyzed,and the targeted collapse measurement were put forward.The analysis results show that the strength attenuation of unsaturated soil caused by surface seepage and the development of soil plastic zone above the tunnel area are the main inducement of tunnel collapse.Aiming at the collapse caused by surface seepage,the dangerous situation of collapse has been effectively solved by controlling the development of tunnel collapse by the backpressure of surcharge,improving the water saturation and softening condition of soil,and improving and strengthening the weakened soil.

关 键 词：隧道塌方 非饱和土强度 渗流 塌方处治技术 

分 类 号：U655.54[交通运输工程—港口、海岸及近海工程] U457.3[交通运输工程—船舶与海洋工程]