工程地质学报Issue(4)：712-718,7.DOI:10.13544/j.cnki.jeg.2015.04.019
隧道穿越泥石流堆积体的数值模拟及优化处治
NUMERICAL SIMULATION AND OPTIMIZATION OF TREATMENT MEASURESFOR A TUNNEL EXCAVATED THROUGH DEBRIS FLOW FAN
摘要
Abstract
Based on geologic features of debris flow fan,combined with the engineering background of Futangtunnel in Dujiangyan to Wenchuan expressway,a 3D numerical model had been established to study tunnelexcavation and support in debris flow fan.The paper presents different modelling conditions,including the nonsupportstatus,designed support status,optimizing support status as well as the deposition and erosion of debrisflow fan.The study results show that,tunnel excavated in debris flow fan,the vault settlements are main controllingfactor and lead to subsidence and side wall convergence;after pointed optimizing treatment to vault settlement usingthe advanced grouting and the systematical anchor lengthening,deformation of tunnel lining and subsidence arereduce markedly,it shows that the optimizations are effectual and reasonable.In addition,if the depositionthickness of debris flow above tunnel vault is less than 1 4 m,the tunnel is in obvious unsafe condition;if the debrisflow thickness is more than 42 m,the stability of surrounding rock will become better and be easy to form astabilizing system.关键词
隧道/泥石流堆积体/数值模拟/优化处治Key words
Tunnel/Debris flow fan/Numerical simulation/Optimizing treatment分类
数理科学引用本文复制引用
李天斌,刘梁,陈国庆..隧道穿越泥石流堆积体的数值模拟及优化处治[J].工程地质学报,2015,(4):712-718,7.基金项目
交通运输部西部交通建设科技项目（20113188051090）和国家自然科学基金项目（41172279）资助． （）
