击实膨胀土工程变形特征的试验研究 - 岩土力学.pdf
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第 24 卷第 5 期 岩 土 力 学 Vol.24 No.5
2003 年 10 月 Rock and Soil Mechanics Oct. 2003
文章编号:1000-7598 -(2003) 05 ―0826 ―05
击实膨胀土工程变形特征的试验研究
李献民,王永和,杨果林,范臻辉
( 中南大学 土木建筑学院, 湖南 长沙 410075 )
摘 要:以湖南邵阳膨胀土为例,对 3 种击实膨胀土工程变形特性进行了试验研究。试验结果表明:膨胀土的起始含水率和
起始干密度对其膨胀力和膨胀量大小的影响是主要的外部因素;根据膨胀力试验和膨胀量试验的试验数据,拟合出膨胀力曲
线和膨胀量曲线的变化规律均为指数关系。同时,还研究了膨胀速度曲线、收缩特性曲线的特征及膨胀和收缩两个过程的相
似关系。研究结果为膨胀土路堤的设计及膨胀土地基处理等膨胀土问题提供了重要的依据。
关 键 词:击实膨胀土;工程变形特性;膨胀力和膨胀量;含水率和干密度
中图分类号:TU 443 文献标识码:A
Test study on engineering deformation characteristics
of compacted expansive soil
LI Xian-min, WANG Yong-he, YANG Guo-lin, FAN Zhen-hui
( College of Civil Engineering and Architecture, Central South University, Changsha 410075, China )
Abstract :By a lot of laboratory tests of expansive soil, in the case of expansive soil in Shaoyang city of Hunan province, the
engineering deformation characteristics of three kinds of expansive soils have been test studied. The test results indicate: the
beginning water content and dried density of expansive soil are the main outside factors that influence the magnitude of their
expansibility and swelling quantity; according to the data of expansibility tests and swelling quantity tests, the variational rule of both
expansibility
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