改性玄武岩残积土的固结试验研究  

Consolidation Test of Modified Basalt Residual Soil

作　　者：张璧玮 陈斌 王子腾 Zhang Biwei;Chen Bin;Wang Ziteng(School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430065, China)

机构地区：[1]武汉科技大学城市建设学院

出　　处：《中国资源综合利用》2019年第6期12-14,18,共4页China Resources Comprehensive Utilization

摘　　要：我国云贵地区的玄武岩残积土具有大孔隙比、高压缩性等诸多不良工程特性,为了改善该类土的压缩性,使之在施工过程与后期使用中变形量更小,本文利用外掺玄武岩纤维来进行土体改性处理。将玄武岩纤维按质量比0.1%、0.2%、0.3%和0.6%掺入玄武岩残积土中制备,通过标准固结试验研究了不同纤维掺量和不同纤维长度对土体改性结果的影响。试验结果表明,玄武岩残积土的压缩模量随纤维含量的增加先增加后减小,随着纤维长度的增加而减小,合理的纤维掺入量能有效改善土体的孔隙结构。The basalt residual soil in the Yunnan-Guizhou region has many bad engineering properties such as large void ratio and high compressibility. In order to improve the compressibility of this kind of soil and reduce its deformation in the construction process and later use, this paper uses basalt fibers to modify the soil. The basalt fiber was prepared by mixing into the basalt residual soil by mass ratio of 0.1%, 0.2%, 0.3% and 0.6%. The effects of different fiber content and different fiber length on the soil modification results were studied by standard consolidation test. The test results show that the compressive modulus of basalt residual soil increases first and then decreases with the increase of fiber content, and decreases with the increase of fiber length. Reasonable fiber blending can effectively improve the pore structure of the soil.

关 键 词：玄武岩残积土 玄武岩纤维 纤维长度 掺入比 标准固结试验 压缩模量 

分 类 号：U416.1[交通运输工程—道路与铁道工程]