摘要
为了探究黏质粉土冻胀过程中水分重分布和密度变化规律,通过4个不同顶板温度条件下黏质粉土的单向冻结试验,采用切层法和计算机断层扫描(CT)对试样冻结前后的分层含水率数据和分层密度数据进行了分析。结果表明:试样冻胀是由水分迁移和初始土样中的水分重分布后在已冻区和冻结缘区域发生相变后体积膨胀所控制的;试样冻胀后已冻区密度减小,未冻区密度增大,与含水率的变化规律相反。整体试样的宏观冻胀包含了已冻区的冻胀作用和未冻区的固结作用。
In order to explore the water content redistribution and density change in the frost heave process,four samples under different top cold temperature were performed based on the one-dimensional freezing experiment in an open system.The water contents,computed tomography(CT)scanning pictures and dry density in different height of the samples were analyzed.The results show that the frost heave amounts of the samples are controlled by the water absorbed process and the redistribution of the water content from the unfrozen to frozen zone.After the tests,the dry density increased in unfrozen and decreased in frozen zone,which had the opposite law with the water content change.
作者
刘万福
石强
王俊生
王永涛
张伟东
徐湘田
LIU Wan-fu;SHI Qiang;WANG Jun-sheng;WANG Yong-tao;ZHANG Wei-dong;XU Xiang-tian(State Grid East Inner Mongolia Economic Research Institute,Hohhot 010020, China;State Grid East Inner Mongolia Electric Power Company Limited,Hohhot 010020, China;Institute of Transportation, Inner Mongolia University, Hohhot 010070, China)
出处
《科学技术与工程》
北大核心
2018年第34期215-220,共6页
Science Technology and Engineering
基金
国网内蒙古东部电力有限公司科技项目(52660616000Q)
内蒙古大学横向课题(22200-5176015)
国家自然科学基金(51769018)
内蒙古自然科学基金(2016MS0530
2017BS0401)资助
关键词
单向冻结
冻胀
水分重分布
CT扫描
密度
one-dimensional freezing
frost heaving
water redistribution
computed tomographc(CT)scanning
density
作者简介
第一作者:刘万福(1962-),男,汉族,河北霸州人,博士,高级工程师。E-mail:ttk96@163.com;通信作者:王永涛(1989-),男,汉族,甘肃庆阳人,博士,讲师。E-mail:wyt_827@imu.edu.cn。
