岩溶地质对隧道施工稳定性的影响评价  

Evaluation on the Influence of Karst Geology on the Excavation Stability of Tunnel

作　　者：方建勤[1,2] 胡居义[3] 

机构地区：[1]同济大学土木工程学院,上海200092 [2]广东省长大公路工程有限公司,广东广州510620 [3]重庆交通科研设计院,重庆400067

出　　处：《矿业研究与开发》2010年第1期40-41,共2页Mining Research and Development

基　　金：国家自然科学基金项目(40802064)

摘　　要：根据依托工程的工程地质特点,利用三维有限元数值模拟方法,选取典型断面,通过分析有溶洞与无溶洞两种工况下隧道开挖引起的隧道围岩的位移、应力等指标的变化,来评价溶洞对隧道稳定性的影响,指出岩溶离隧道顶部较近时,隧道开挖可能使顶板断裂而出现垮塌,从而造成突水突泥等地质灾害。According to the engineering geological conditions of some tunnel,selecting the typical profiles,the changes of displacement and stress of tunnel＇s surrounding rock caused by excavation when there was or was not karst cave was simulated using three-dimensional finite element method,and the influence of karst cave on stability of tunnel was evaluated.It was pointed out that if karst cave is closer to tunnel＇s roof,tunnel excavation may lead to the fracture and collapse of the roof,thereby resulting in such geological hazards as silt and water inrush.

关 键 词：隧道 岩溶地质 位移 应力 稳定性 

分 类 号：U451[建筑科学—桥梁与隧道工程]