基于邓肯-张模型的饱和土统计损伤模拟方法研究  

Statistical Damage Simulation Method for Saturated Soil Based on Duncan-Chang Model

作　　者：黄安邦 魏良帅 贾逸[1,2] 和铭[1,2] 王家柱 黄海峰 HUANG Anbang;WEI Liangshuai;JIA Yi;HE Ming;WANG Jiazhu;HUANG Haifeng(Institute of Exploration Technology,Chinese Academy of Geological Sciences,Chengdu 611734,Sichuan,China;Technical Center for Geological Hazard Prevention and Control,China Geological Survey,Chengdu 611734,Sichuan,China;Chengdu Center of Geological Survey,China Geological Survey,Chengdu 610081,Sichuan,China;Northern Sichuan Expressway Company Limited,Chengdu 610041,Sichuan,China)

机构地区：[1]中国地质科学院探矿工艺研究所,四川成都611734 [2]中国地质调查局地质灾害防治技术中心,四川成都611734 [3]中国地质调查局成都地质调查中心,四川成都610081 [4]四川省川北高速公路股份有限公司,四川成都610041

出　　处：《水力发电》2019年第4期28-32,共5页Water Power

基　　金：中国地质调查局二级项目(DD20160287)

摘　　要：为反映饱和土变形的全过程,以某水电工程边坡破碎带饱和土为研究对象,采用CSS-2901TS型土体三轴流变试验机开展固结排水三轴压缩试验。在邓肯-张模型的基础上引入统计损伤理论,建立一种新的饱和土统计损伤本构模型,依据邓肯-张模型自身特性和回归求解的曲线拟合法,给出模型参数的确定方法,并对模型参数进行修正,使模型可反映差异性围压环境。结果表明,所建模型能较好地辨识饱和土变形过程,拟合精度较高,且模型结构简单,参数较少,具有较强的适用性。In order to reflect the deformation process of saturated soil,the saturated soil in the fracture zone of a slope in a hydropower project is taken as research object and the CSS-2901TS soil triaxial rheological test machine is used to carry out consolidation drainage triaxial compression test.A new statistical damage constitutive model of saturated soil is established by introducing statistical damage theory based on Duncan-Chang model.The method of determining the parameters of model is given according to the curve fitting method of regression solution and Duncan-Chang model itself,and the model parameters are modified to reflect the different confining pressure environment.The results show that the model can identify the deformation process of saturated soil better and the fitting accuracy is higher.This model has simple structure and less parameters,so it has strong rationality and applicability.

关 键 词：饱和土 固结排水 统计损伤 本构模型 邓肯-张模型 

分 类 号：TU411[建筑科学—岩土工程]