中南大学学报（自然科学版）2017，Vol.48Issue(6)：1594-1599,6.DOI:10.11817/j.issn.1672-7207.2017.06.024
一种新的胶凝砂砾石坝坝料应变预测模型
A new model for prediction of deformation on CSG material
摘要
Abstract
In order to study deformation on cement-sand-gravel (CSG) material,a series of triaxial compression tests of CSG material with 60 kg/m3 content were conducted under confining pressures of 300,600,900 and 1 200 kPa.Combined with the test results,Mohr coulomb criteria,improved hyperbolic curve and parabolic curve,were respectively used to describe the strength characteristics of CSG material,the relationship of stress versus strain and volumetric strain versus axial strain,and a new model for prediction of deformation on CSG material was built.The results show that the slope of the stress-strain curve under high confining pressures is bigger than that under low confining pressure before peak strength.The dilatancy of CSG material under low confining pressure is displayed faster than that under high confining pressure.The shear stress and volumetric strain increase with confining pressure increasing under the same axial strain.The calculation results of model are consistent with the experimental data,showing that the model accurately reflects the relationship of stress versus strain for CSG material.关键词
胶凝砂砾石料/应力-应变方程/体积应变方程/预测模型Key words
CSG material/stress-strain equation/dilatancy equation/prediction model分类
建筑与水利引用本文复制引用
蔡新,杨杰,郭兴文..一种新的胶凝砂砾石坝坝料应变预测模型[J].中南大学学报（自然科学版）,2017,48(6):1594-1599,6.基金项目
国家自然科学基金资助项目(51179061) （51179061）
国家“十二五”科技支撑计划项目(2012BAD10B02) （2012BAD10B02）
水利部土石坝破坏机理与防控技术重点实验室开放基金资助项目(YK913001) （YK913001）
中央高校基本科研业务费专项资金资助项目(2014B36814)(Project(51179061)supported by the National Natural Science Foundation of China （2014B36814）
Project(2012BAD10B02) supported by the National Science & Technology Pillar Program during the 12th "Five-year" Plan Period of China （2012BAD10B02）
Project(YK913001) supported by the Open Foundation of Key Laboratory of Failure Mechanism and Safety Control Techniques of Earth-rock Dam of the Ministry of Water Rescources （YK913001）
Project(2014B36814) supported by the Fundamental Research Funds for the Central Universities) （2014B36814）
