强震作用下崩滑危岩体模型试验滑面材料配比研究  

Study on material ratio of sliding surface for model testing of landslide under strong earthquake effect

作　　者：祝介旺[1] 吕国靖 李文乐 周广强[1] 王生勇 ZHU Jiewang;LYU Guojing;LI Wenle;ZHOU Guangqiang;WANG Shengyong(School of Civil Engineering,Shandong Jianzhu University,Jinan 250101,China)

机构地区：[1]山东建筑大学土木工程学院,山东济南250101

出　　处：《山东建筑大学学报》2024年第3期18-25,共8页Journal of Shandong Jianzhu University

基　　金：国家重点研发计划(2019YFC1509703)。

摘　　要：研究强震作用下崩滑危岩体模型的滑面相似材料配比可为软弱夹层的模拟提供理论依据。基于正交试验设计方法,选用石英砂、滑石粉、黄土、甘油、水5种材料,设置石英砂与总质量之比、滑石粉与黄土的质量之比、甘油和水与总质量之比、甘油与水的质量之比4个控制因素,通过剪切试验获取黏聚力和内摩擦角两个力学指标,利用极差分析法和方差分析法研究相似材料的配比,由多元线性回归方程求解拟合值。结果表明:拟合值和试验值具有较高的相似度;内摩擦角、黏聚力作为主控因素,随着石英砂与总质量之比的增大分别增大、减小;作为次要因素,黏聚力随甘油和水与总质量之比的增大而减小;滑石粉与黄土的质量之比对黏聚力具有较大影响,而对内摩擦角影响则极小。This study explores the similarity material ratio of sliding surface for a model of landslide under strong earthquake effect,providing a theoretical basis for simulating weak interlayers.Utilizing the orthogonal experimental design method,five materials-quartz sand,talc,loess,glycerin,and water are selected.Four control factors are set:the ratio of quartz sand to total mass,the ratio of talc to loess mass,the ratio of glycerol and water to total mass,and the ratio of glycerol to water mass.Two mechanical indexes of cohesion and internal friction angle are obtained by shear tests.Range and variance analysis are used to study the ratio of similar materials,and by solving the fitting value through multiple linear regression equations and comparing it with the experimental value,it is found that the fitting degree is relatively high.The results indicate that as the main control factors,the internal friction angle increases and cohesion decreases as the ratio of quartz sand to total mass increases.As secondary factor,cohesion decreases as the ratio of glycerol and water to total mass increases.The ratio of talc to loess mass has a great influence on cohesion,but little influence on internal friction angle.

关 键 词：正交试验 材料配比 软弱夹层 极差分析 方差分析 

分 类 号：P315.8[天文地球—地震学]