降雨条件下明挖隧道回填土的堆载稳定性分析  

Stability Analysis of Open Excavation Tunnel Backfill Load under Rainfall Conditions

作　　者：陶祥令[1,2] 黄梓宸 陈超[2,3] TAO Xiangling;HUANG Zichen;CHEN Chao(Jiangsu Vocational Institute of Architectural Technology,Xuzhou 221116,China;China University of Mining and Technology,Xuzhou 221116,China;State Key Laboratory for Geomechanics and Deep Underground Engineering,Xuzhou 221116,China)

机构地区：[1]江苏建筑职业技术学院,徐州221116 [2]中国矿业大学,徐州221116 [3]深部岩土力学与地下工程国家重点实验室,徐州221116

出　　处：《现代交通技术》2022年第6期50-54,64,共6页Modern Transportation Technology

基　　金：中国博士后科学基金项目(2020M681769);江苏省住房和城乡建设厅科技计划项目(2019ZD079);江苏省高等学校自然科学研究项目(20KJA560003)。

摘　　要：对于覆土明挖隧道,回填土的堆载稳定性是评价隧道整体稳定性的关键指标之一。以徐州某临坡明挖隧道为研究对象,通过MIDAS GTS NX软件建立隧道回填土边坡计算模型,计算开挖隧道结构与坡脚所处不同距离时,施工隧道上覆盖填埋土体厚度、降雨环境等条件影响下的覆盖土体边坡位移量。计算表明,距离坡脚较远处开挖隧道,边坡水平位移量较大,且在坡脚和坡顶处的竖向位移较大;随着人工填土厚度的增加,边坡的水平位移和竖向位移皆变大;降雨后土体在水平和竖直方向的位移皆变大。工程中应重视雨季施工回填土堆载的稳定性监测,做好相应预防措施。For covering soil open excavation tunnel,the stability of the backfill load is one of the key indexes to evaluate the overall tunnel stability.Taking a slope open excavation tunnel in Xuzhou as the research object,a calculation model of tunnel backfill slope is built by MIDAS GTS NX.It calculates slope displacements under the conditions of different distances between the tunnel and the slope toe,different thickness of the covered soil on the tunnel and the rainfall.The results show that the slope horizontal displacement is larger when the tunnel is farther away from the slope toe and the slope vertical displacement is larger at the toe and top of the slope.The horizontal and vertical displacement of the slope is larger with the increase of artificial fill thickness.The displacement of soil in horizontal and vertical directions becomes larger after rainfall.In engineering construction,it is particularly important to pay attention to the stability monitoring of backfill load in rainy season and take preventive measures.

关 键 词：明挖法 边坡位移 降雨 数值模拟 

分 类 号：U455.45[建筑科学—桥梁与隧道工程]