地聚物改良粗粒土的动力特性试验及土坡地震反应分析研究  

Experimental study on dynamic characteristics and analysis on seismic response of soil slope of improvement of coarse grained soil by geopolymers

作　　者：苏慧[1] 毛昆明[1] 赵以新 李兴雨 SU Hui;MAO Kunming;ZHAO Yixin;LI Xingyu(Jinling Institute of Technology,Nanjing 211196,China)

机构地区：[1]金陵科技学院,江苏南京211196

出　　处：《江苏水利》2022年第12期7-12,共6页Jiangsu Water Resources

基　　金：江苏省水利厅科技项目(2019062);江苏省教育厅基金(18KJD560002)。

摘　　要：针对不同围压不同块石含量的地聚物改良粗粒土,进行一系列固结不排水的大型三轴循环试验。探究了不同块石含量、不同围压和不同剪应变幅值下地聚物改良粗粒土的Gmax以及G/Gmax~γ和λ~γ的演化规律,基于实验结果对地聚物改良粗粒土体动力反应所用到的修正的Davidenkov粘弹性动力本构模型进行了二次开发和子程序编译,以某一代表性边坡作为研究场地,对地聚物改良粗粒土坡在不同地震动作用下的地聚物改良土坡地震反应特性进行了数值模拟,得到了动剪应力、加速度和水平位移反应规律。A series of large-scale triaxial cyclic tests of consolidation without drainage were carried out for geopolymers improve coarse-grained soils with different confining pressure and different stone content.The evolution law of Gmax,G/Gmax~γ and λ~γ of coarse-grained soil modified by geomeric under different rock contents,confining pressures and shear strain amplitude-values was explored.Based on the experimental results,the modified Davidenkov viscoelastic dynamic constitutive model used in dynamic response of coarse-grained soil modified by geomeric was developed and the subprogram was compiled.Taking a representative slope as the research site,the seismic response characteristics of the modified coarse grain soil slope with geopolymer under different ground motion were simulated numerically,and the response laws of dynamic shear stress,acceleration and horizontal displacement were obtained.

关 键 词：地聚物改良粗粒土 动力特性 地震反应 

分 类 号：U451[建筑科学—桥梁与隧道工程]