贝壳改良膨胀土的抗剪强度试验研究  

Study of shear strength test on expansive soil improved by shell

作　　者：许长辉 孙树林[2] XU Changhui;SUN Shulin(Geological Exploration Bureau of Zhejiang Province,Hangzhou 310012,China;College of Earth Sciences and Engineering, Hohai University, Nanjing 211100, China)

机构地区：[1]浙江省地矿勘察院,浙江杭州310012 [2]河海大学地球科学与工程学院,江苏南京211100

出　　处：《河北工程大学学报（自然科学版）》2017年第3期38-40,49,共4页Journal of Hebei University of Engineering:Natural Science Edition

基　　金：国家重点实验室开放研究基金项目(2005408911);留学回国人员科研基金项目资助(20071108)

摘　　要：针对膨胀土遇水膨胀失水收缩的问题,将贝壳碾碎添加到膨胀土中,通过系统的室内抗剪强度试验,探讨贝壳改良膨胀土的强度变化规律。试验结果表明:掺入贝壳能够有效提高膨胀土的抗剪强度,随着贝壳掺量的提高,抗剪强度先增大后减小,12%贝壳掺量时,改良土的抗剪强度达到最大。According to the characteristics of the expansive soil which are the expansion of soil meetswater and shrinkage of soil loses water,the strength change law of shell modified expansive soil wasstudied by crushing the shells and adding them to the swelling soil through the scientific indoor shearstrength test.The test results show that adding shells can effectively improve the shear strength ofexpansive soil.With the increase of the shell content,the shear strength increases fi rst and then decreases,and the shear strength of the improved soil reaches the maximum when the amount of the shells is12%.

关 键 词：贝壳 改良膨胀土 抗剪强度 

分 类 号：TU43[建筑科学—岩土工程]