玄武岩纤维水泥土三轴试验研究  

Experiment on triaxial test of basalt fiber cement-soil

作　　者：陈峰[1,2] 简文彬[2] 

机构地区：[1]福建江夏学院环保节能型高性能混凝土协同创新中心,福州350108 [2]福州大学环境与资源学院,福州350116

出　　处：《兰州大学学报（自然科学版）》2016年第6期741-745,共5页Journal of Lanzhou University(Natural Sciences)

基　　金：国家自然科学基金项目(41072232);福建省自然科学基金项目(2015J01634)

摘　　要：为了提高水泥土的受力性能,利用玄武岩纤维的加筋增强效果,探讨在水泥土中掺入玄武岩纤维以改善其力学性能的方法.采用不固结不排水三轴试验,对玄武岩纤维水泥土的抗剪强度进行研究,了解其强度及变形特性.结果表明:玄武岩纤维的掺入使水泥土的黏聚力有较大幅度的提高,且二者大致呈正比关系;应力应变曲线大致可以分为3个阶段:线弹性阶段、塑性屈服阶段、峰值软化阶段;玄武岩纤维的掺入具有类围压作用,对水泥土强度具有明显的提高作用,且增大了其塑性变形.In order to enhance the mechanic quality of cement-soil, the basalt fiber＇s reinforcement effect and the way to improve cement soil＇s strength by means of mixing the basalt fiber were discussed. Through undrained triaxial compression tests, the shear strength and deformation of basalt fiber cement-soil was studied and the results showed that the cohesion of cement-soil had been greatly improved by an incorporation of fiber. The stress-strain curves could be divided into three stages, i.e. linear elastic stage, plastic yield stage and peak stage of softening. The incorporation of basalt fibers had an effect on the strength of the specimens, like the confining pressure. And it had also obviously improved the strength of cement soil and increased its plastic deformation.

关 键 词：软土加固 水泥土 玄武岩纤维 三轴试验 塑性变形 

分 类 号：TU411[建筑科学—岩土工程]