渗流及软化耦合作用下的水工隧道稳定性研究  

The Study on the Stability of Hydraulic Tunnels under the Coupled Effects of Seepage and Softening

作　　者：何万信 HE Wanxin(Jianshan Reservoir Management Office,Xingren Water Bureau,Xingren 562300,China)

机构地区：[1]兴仁市水务局尖山水库管理所,贵州省兴仁562300

出　　处：《河南水利与南水北调》2024年第5期82-83,共2页Henan Water Resources & South-to-North Water Diversion

摘　　要：为研究渗流及软化耦合作用对水工隧道稳定性影响。文章基于数值模拟研究了衬砌反力、中间主应力系数对隧道围岩应力及塑性软化区扩展的影响,结果表明,渗流和软化作用对隧道围岩具有劣化作用,隧道开挖施工过程中应尽量增大衬砌结构的刚度从而提高衬砌反力,增加隧道稳定性。研究结果为水工隧洞的施工提供参考。In order to explore the influence of seepage and softening coupling on the stability of hydraulic tunnel,the effects of lining reaction and intermediate principal stress coefficient on the stress distribution in the surrounding rock and the expansion of plastic softening zone are investigated through numerical simulation.The findings indicate that seepage and softening exert a deteriorating impact on the stability of tunnel surrounding rock.Therefore,it is advisable to enhance the stiffness of the lining structure to optimize both the reaction of the lining and overall tunnel stability during excavation.The findings can serve as a valuable reference for the development of hydraulic tunnels.

关 键 词：引水隧道 围岩稳定性 数值模拟 

分 类 号：TU43[建筑科学—岩土工程]