腾冲地区玄武岩残积粘土物理力学性能研究  

BASALT RESIDUAL CLAY IN TENGCHONG AREA RESEARCH ON PHYSICAL AND MECHANICAL PROPERTIES

作　　者：杨荣美 陈安[1] 槐以高 眭素刚 YANG Rong-mei;CHEN An;HUAI Yi-gao;SUI Su-gang(School of Land and Resources Engineering,Kunming University of Science and Technology,Kunming 650093,China;Kunming Survey,Design and Research Institute of China Nonferrous Metals Industry,Kunming 650051,China)

机构地区：[1]昆明理工大学国土资源工程学院,昆明650093 [2]中国有色金属工业昆明勘察设计研究院,昆明650051

出　　处：《地质灾害与环境保护》2023年第4期98-102,共5页Journal of Geological Hazards and Environment Preservation

摘　　要：为了研究腾冲地区广泛分布的玄武岩残积粘土的物理力学性能,通过比重试验、含水率试验、固结试验等室内土工试验及现场原位测试获取相关试验参数,并进行室内理论分析,结果表明:腾冲地区玄武岩残积粘土化学成份以SiO_(2)、Al_(2)O_(3)和Fe_(2)O_(3)为主;玄武岩残积粘土的含水率介于14%~95%之间,平均值为49.44%,孔隙比介于0.48~2.56之间,平均为1.44,饱和度介于46~100之间,平均值为92.52,湿密度介于1.36~2.13,平均值为1.68;压缩系数a1-2为0.67 MPa-1,属于高压缩性土,土体结构松散,物理力学性质空间变化大,直剪快剪黏聚力C为40.13 kPa,内摩擦角φ为7.44°,强度相对较低。In order to study the physical and mechanical properties of basalt residual clay widely distributed in Tengchong area,The relevant test parameters were obtained through indoor geotechnical tests such as specific gravity test,moisture content test,consolidation test and field in-situ test,and indoor theoretical analysis was carried out.The results show that the chemical components of basalt residual soil in Tengchong area are mainly SiO_(2),Al_(2)O_(3) and Fe_(2)O_(3);The water content of basalt residual clay is between 14%~95%,the average value is 49.44%,the void ratio is between 0.48~2.56,the average value is 1.44,the saturation is between 46~100,the average value is 92.52,the wet density is between 1.36~2.13,the average value is 1.68;The compressibility coefficient al-2 is 0.67 MPa-1,which belongs to highly compressible soil.The soil structure is loose,the physical and mechanical properties vary greatly in space,the cohesion is 40.13 kPa,and the internal friction angle 7.44°,the strength is relatively low.

关 键 词：腾冲地区 玄武岩残积粘土 物理力学性能 工程特性 

分 类 号：TU43[建筑科学—岩土工程] TU411[建筑科学—土工工程]