草根加筋土的室内直剪试验研究  

Study on Grassroots-reinforced Soil by Direct Shear Test

作　　者：任小敏[1] 王泽华[2] 

机构地区：[1]安徽省公路工程检测中心,合肥230022 [2]中交第二公路勘察设计研究院有限公司,武汉430056

出　　处：《交通科技》2015年第2期126-128,共3页Transportation Science & Technology

摘　　要：以庆阳黄土为研究对象,对加筋土的剪切试验研究现状进行了综述,通过室内直剪试验研究了草根加筋土的应力-应变及强度特性,探讨了草根加筋土抗剪强度指标的变化规律。试验结果表明,草根加筋土的强度和抵抗变形的能力较素土有显著的增强,加筋后土样的抗剪强度增强,内摩擦角φ提高幅度不大,而粘聚力c提高幅度较大。In this paper,taking Qingyang loess as the object,the research status of shear test of reinforced soil was reviewed.Laboratory direct shear tests were carried out in order to understand the stress-strain relationship and strength property of grassroots-reinforced soil and to study the changes of shear strength parameters of grassroots reinforced soil.The laboratory test results show that the strength and the capacity for resisting the deformation of grassroots-reinforced soil are better than those of unreinforced soil;shear strength of reinforced soil enhances significantly,internal friction angle increases marginally,while cohesion increases by a big margin.This study has guiding significance for understanding the mechanism of vegetation slope.

关 键 词：直剪试验 草根加筋土 应力-应变关系 强度 

分 类 号：TU411.7[建筑科学—岩土工程]