工程地质学报Issue(1)：65-71,7.DOI:10.13544/j.cnki.jeg.2015.01.010
冻融循环影响风化砂改良膨胀土抗剪强度室内试验研究
LABORATORY RESEARCH ON EFFECT OF FREEZE-THAW CYCLES TO SHEAR STRENGTH OF WEATHERED SAND IMPROVED WITH EXPANSIVE SOIL
摘要
Abstract
This paper investigates the qualitative and quantitative relationships among shear strength of weathered sand improved with expansive soil,weathered sand content and cycle times of freeze-thaw tests.The expansive soil is added with weathered sand with the percentages of 0,10%,20%,30%,40%,50%,respectively.The shear strength test is done using direct shear apparatus on the samples after 0,1,3,6,9,12 cycles of freezing and thawing.Test results show that as the cycles of freeze-thaw increases,the shear indexes and the shear strength of weathered sand improved expansive soil first increase and then decrease and gradually reach stable after several times of freeze-thaw cycles for samples with the same sand ratio.The relationship between cohesive force and freeze-thaw cycles can be expressed in logarithmic function.As the mixed sand ratio increases,the cohesion decrease but the internal frictional angle increases for samples with the same cycles of freeze and thaw.关键词
膨胀土/冻融循环/风化砂/抗剪强度Key words
Expansive soil/Freeze-thaw cycle/Weathered sand/Shear strength分类
建筑与水利引用本文复制引用
杨俊,童磊,许威,张国栋..冻融循环影响风化砂改良膨胀土抗剪强度室内试验研究[J].工程地质学报,2015,(1):65-71,7.基金项目
湖北省教育厅自然科学研究重点项目（D20131304）资助． （）
