工程地质学报2017，Vol.25Issue(3)：706-714,9.DOI:10.13544/j.cnki.jeg.2017.03.017
弱膨胀土的膨胀特性试验研究
EXPERIMENTAL STUDY OF SWELLING CHARACTERISTICS OF WEAK EXPANSIVE SOIL
摘要
Abstract
At present,the main soil swelling force measuring methods include swelling-consolidation method,pressure swelling method,balance pressure method,constant volume method.Based on the constant volume method of measuring soil swelling force,the TST-55-type permeameter,high-precision pressure sensors and data acquisition system are used to improves measuring method of soil swelling force,and to study the expansion characteristics of expansive soil.Test results show that the initial water content and dry density of soil sample have a significant influence to limit swelling force.The paper establishes the equation for their relation with limit swelling forces.At lower initial water content,when soil sample's limit swelling force of different dry density reaches a peak,it has a different rate of decrease.The value along with increasing of the dry density can be decreased.A linear relationship exists in the double logarithmic coordinate axis about the reduction value of limit swelling force and the dry density.At higher initial water content,when soil sample's limit swelling force of different dry density reaches a peak,it will remain stable trend.There is a good linear relationship between the logarithm of limit swelling force and initial water content.There is also a good linear relationship between the logarithm of water absorption of soil sample and initial water content or dry density.关键词
弱膨胀土/极限膨胀力/恒体积法Key words
Weak expansive soil/Limit swelling force/Constant volume method分类
建筑与水利引用本文复制引用
文松松,梁维云,陈永健,黄炫彰,颜荣涛,韦昌富..弱膨胀土的膨胀特性试验研究[J].工程地质学报,2017,25(3):706-714,9.基金项目
国家自然科学基金(11372078,51309055),广西自然科学基金创新研究团队项目(2014GXNSFBA118236)资助. （11372078,51309055）
