考虑等效裂隙面的含软弱夹层边坡降雨渗流模型  

A Seepage Model for Slopes with Soft Interlayers in Consideration of Equivalent Fracture Surfaces

作　　者：钟卓希 盛建龙[1,2] 胡斌 李京 王庭元 ZHONG Zhuo-xi;SHENG Jian-long;HU Bin;LI Jing;WANG Ting-yuan(School of Resources and Environmental Engineering,Wuhan University of Science and Technology,Wuhan 430081,China;Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgical Mineral Resources,Wuhan University of Science and Technology,Wuhan 430081,China)

机构地区：[1]武汉科技大学资源与环境工程学院,武汉430081 [2]武汉科技大学冶金矿产资源高效利用与造块湖北省重点实验室,武汉430081

出　　处：《长江科学院院报》2023年第7期118-124,共7页Journal of Changjiang River Scientific Research Institute

基　　金：国家自然科学基金项目(41672317,U1802243);湖北省技术创新重大专项(2017ACA184);武汉科技大学重大科技项目培育类创新团队项目(2018TDX01)。

摘　　要：边坡渗流模型的合理构建是研究含软弱夹层边坡渗流特性和稳定性的关键。将软弱夹层与上部岩体的交接结构面等效为一定宽度的单裂隙面,基于渗流-应力耦合的饱和-非饱和渗流理论,建立含软弱夹层等效裂隙面边坡渗流模型。结果表明:该模型在降雨工况下对含软弱夹层边坡渗流特性的模拟结果与饱和-非饱和经典模型基本保持一致,并且坡脚处等效裂隙面渗透系数增长较快,更加符合边坡渗透系数增长的实际情况。对比饱和-非饱和经典模型下的稳定性系数变化曲线,发现等效裂隙面的导流作用对含软弱夹层边坡稳定性系数有着显著影响。该模型对实际工程中含软弱夹层边坡设计具有一定的依据和参考作用。The key to researching the seepage characteristics and stability of slopes containing soft interlayers is to construct a reasonable seepage model.On the basis of saturated-unsaturated seepage-stress coupling theory,we established a slope seepage model by assuming that the intersection surface between soft interlayers and upper rock mass is equivalent to a single fracture surface of certain width.The modelling result is in general consistent with the simulation results of classical saturated-unsaturated model in terms of the seepage characteristics of slopes with soft interlayers under rainfall conditions.The permeability coefficient of the equivalent fissure surface at the foot of the slope grows rapidly,which is more consistent with the actual growth of the slope permeability coefficient.By comparing the curve of stability coefficient between the proposed model and classical model,we found that the inflow of the equivalent fissure surface has a significant influence on the stability coefficient of slopes with soft interlayers.The model offers a basis and reference for the design of slopes with soft and weak inclusions in practical projects.

关 键 词：软弱夹层 渗流模型 等效裂隙面 边坡稳定性 降雨 

分 类 号：TU43[建筑科学—岩土工程]