含充填裂隙的膨胀土强度特性研究  

Research on Strength Characteristics of Expansive Soil with Filling Fracture

作　　者：陆正 王保田[1,2,3] 康靖宇 张恒 张福海 张海霞[1,2] LU Zheng;WANG Baotian;KANG Jingyu;ZHANG Heng;ZHANG Fuhai;ZHANG Haixia(Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing 210098,China;Research Institute of Geotechnical Engineering,Hohai University,Nanjing 210098,China;Department of Water Conservancy and Civil Engineering,Tibet Agricultural and Animal Husbandry University,Linzhi 860000,China)

机构地区：[1]河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210098 [2]河海大学江苏省岩土工程技术工程研究中心,江苏南京210098 [3]西藏农牧学院水利土木工程学院,西藏林芝860000

出　　处：《粉煤灰综合利用》2021年第6期24-28,共5页Fly Ash Comprehensive Utilization

基　　金：国家自然科学基金(51778211);江苏省自然科学基金(BK20171434)。

摘　　要：膨胀土边坡裂隙的发育对边坡的稳定性有着重要的影响,目前关于膨胀土内部细长充填裂隙对膨胀土强度的影响尚无系统的研究。本文采用膨润土模拟膨胀土边坡中充填裂隙内的充填物质,制作包含人工充填裂隙的膨胀土试件进行抗剪强度试验,研究充填裂隙含水率、厚度、倾角、蒙脱石含量等特性对膨胀土抗剪强度的影响。结果表明:带充填裂隙的膨胀土试件抗剪强度随着裂隙厚度增加而降低,随着裂隙含水率的增加而降低,随着裂隙内蒙脱石的含量的增加而降低,同时试件抗剪强度也随着倾角增加而逐渐降低。The development of fracture in expensive soil has an important influence on the stability of the slope.At present,there is no systematic research on the influence of slender filling fracture on the strength of expansive soil.In this paper,bentonite is used to simulate filling material in filling fracture in expansive soil slope,the expansive soil samples containing artificial filling fracture were made for shear strength test.The effects of filling fracture moisture content,thickness,inclination and montmorillonite content on shear strength of expansive soil were studied.The shear strength of expansive soil specimens with filled fissures decreases with increase of fracture thickness.The shear strength of the specimen decreases with the increase of fracture moisture content.The shear strength of the specimen decreases with the increase of the content of the delamination in the fissure.At the same time,the shear strength of the sample decreases gradually with the increase of inclination angle.

关 键 词：膨胀土 膨润土 抗剪强度 充填裂隙 裂隙参数 

分 类 号：TU443[建筑科学—岩土工程]