基于小应变土体硬化模型的水工隧洞围岩稳定性研究  

Study on the Stability of Surrounding Rock of Hydraulic Tunnel Based on the Hardening Soil Model with Small Strain Stiffness

作　　者：贾晶玺 于奎[1] 黄勇 盛健挺 梁江晟 孟凡香 JIA Jingxi;YU Kui;HUANG Yong;SHENG Jianting;LIANG Jiangsheng;MENG Fanxiang(College of Water Conservancy and Electric Power,Heilongjiang University,Harbin 150080,China;Heilongjiang Provincial Water Conservancy and Hydroelectric Power Investigation,Design and Research Institute,Harbin 150080,China)

机构地区：[1]黑龙江大学水利电力学院,哈尔滨150080 [2]黑龙江省水利水电勘察设计研究院,哈尔滨150080

出　　处：《河南科学》2022年第7期1108-1114,共7页Henan Science

基　　金：国家自然科学基金(52109055)。

摘　　要：在地下结构开挖过程中,除少数区域发生塑性变形或破坏以外,大部分区域为小应变.数值分析广泛使用Mohr-Coulomb模型分析地下结构,但由于该本构模型缺乏对土体变形特性尤其是小应变阶段变形特性的考虑,往往难以准确预测变形情况.本文介绍小应变土体硬化(HSS)模型的原理和参数确定方法,认为HSS模型能够考虑到在小应变阶段土体的高模量和非线性问题,利用小应变土体硬化模型分析计算出的变形结果与现场实测数据更为接近,对水工隧洞围岩变形分析有着重要意义.使用有限元商业软件PLAXIS 3D,以二甲沟水库引水隧洞工程为计算模型,采取小应变土体硬化模型研究该隧洞的围岩应力和变形情况,为类似隧洞工程变形的系统分析和准确预测提供参考.During excavation of underground structures,most areas occur small deformation,except for a few areas where plastic deformation or failure occurs. The Mohr-Coulomb model is widely used in numerical analysis of underground structures,but it is often difficult to accurately predict deformation due to the lack of consideration of soil deformation properties in this constitutive model,particularly in the small strain phase. The hardening soil model with small strain stiffness can take into account the high modulus and non-linearity of the soil at small strain stage,and the deformation results calculated by using the hardening soil model with small strain stiffness are closer to the measured data in the field,which is of great significance for the deformation analysis of the surrounding rock of hydraulic tunnels. PLAXIS 3D,a commercial finite element software is used to study the stress and deformation of the surrounding rock in the Erjiagou Reservoir diversion tunnel project using hardening soil model with small strain stiffness as a model for calculation,which provides a reference for the systematic analysis and accurate prediction of deformation in similar tunnel projects.

关 键 词：水工隧洞 HSS模型 围岩稳定性 数值分析 PLAXIS 3D 

分 类 号：TU457[建筑科学—岩土工程] TV314[建筑科学—土工工程]