降雨作用对隧道衬砌结构力学特性的影响研究  

Study on the Influence of Rainfall on the Mechanical Property of Tunnel Lining Structure

作　　者：谭芝文 熊斌 邱琼 曾灵芝 陈立 张海燕 冯嘉林 张剑东 TAN Zhiwen;XIONG Bin;QIU Qiong;ZENG Lingzhi;CHEN Li;ZHANG Haiyan;FENG Jialin;ZHANG Jiandong(China Construction Tunnel Co.,Ltd.,Chongqing 401320,China;Chongqing Jiangnan Urban Construction and Development(Group)Co.,Ltd.,Chongqing 400000,China)

机构地区：[1]中建隧道建设有限公司,重庆401320 [2]重庆市江南城市建设发展(集团)有限公司,重庆400000

出　　处：《施工技术(中英文)》2025年第3期78-83,共6页Construction Technology

基　　金：中建五局重点课题:钻爆法隧道喷射混凝土降耗及变断面快速施工关键技术研究与应用(cscec5b-2022-28)。

摘　　要：为研究降雨条件下隧道衬砌结构力学特性,依托重庆市某城市山岭隧道工程,通过数值模拟计算,分析不同岩土层含水率下围岩位移、隧道初期支护弯矩、隧道二次衬砌位移及最大主应力变化规律。研究结果表明,当岩土层含水率<28%时,隧道围岩最大位移随着含水率的增大而增大,当岩土层含水率增至32%时,边坡处于失稳状态;在不同岩土层含水率条件下,隧道初期支护弯矩分布不对称,整体呈偏压状态;当岩土层含水率<32%时,从总体分析,隧道二次衬砌拱顶、左拱腰、右拱腰、右拱脚位移基本随着岩土层含水率的增大而增大,最大主应力基本随着围岩的劣化而增大。实际工程中建议采用挡土墙、抗滑桩或二者相结合的支护措施控制岩土体变形,从而避免引起隧道结构变形。In order to study the mechanical characteristics of tunnel lining structure under rainfall conditions,based on the urban mountain tunnel project in Chongqing,this paper analyzes the variation laws of surrounding rock displacement,initial support bending moment of the tunnel,secondary lining displacement of the tunnel and the maximum principal stress through numerical simulation calculation under different water content of rock and soil layers.The research results show that when the water content of rock and soil layers is less than 28%,the maximum displacement of the tunnel surrounding rock increases with the increase of water content.When the water content of rock and soil layers increases to 32%,the slope is in an unstable state.Under different water content conditions of rock and soil layers,the distribution of the initial support bending moment of the tunnel is asymmetric,and the overall state is biased pressure.When the water content of rock and soil layers is less than 32%,from the overall analysis,the displacement of the tunnel secondary lining arch top,left arch waist,right arch waist and right arch foot basically increases with the increase of water content of rock and soil layers,and the maximum principal stress basically increases with the deterioration of the surrounding rock.In actual engineering,it is recommended to adopt retaining walls,anti⁃slide piles or a combination of the two as support measures to control the deformation of rock and soil mass,so as to avoid causing deformation of the tunnel structure.

关 键 词：隧道 围岩 衬砌 降雨 力学性能 数值模拟 

分 类 号：U45[建筑科学—桥梁与隧道工程]