陕南地区膨胀土的膨胀性试验研究  

Experimental Study on Expansibility of Expansive Soil in Southern Shanxi Region

作　　者：张志伟[1] 张玲玲[2] 

机构地区：[1]西南交通大学土木工程学院,成都610031 [2]西南科技大学土木工程与建筑学院,四川绵阳621010

出　　处：《路基工程》2010年第3期190-192,共3页Subgrade Engineering

摘　　要：当含水量发生变化膨胀土产生膨胀变形时,在侧限状态下,膨胀土表现出很大的膨胀力。文中采用膨胀试验研究了陕南地区膨胀土的初始物理状态(即干密度、含水量和孔隙比)对膨胀力的影响。并建立了初始物理状态与膨胀力的线性关系,提出了陕南地区膨胀土膨胀力的计算式。When expansive soil swells due to changes of water content,under unconfined state,expansive soil shows larger expansibility.This paper studies the initial physical state（i.e.dry density,water content and void ratio） of expansive soil in Southern Shanxi Region based on expansion test.It establishes the linear relation between initial physical state and expansibility and puts forward the formula of expansive soil expansibility in Southern Shanxi Region.

关 键 词：膨胀土 膨胀力 蒙脱石 

分 类 号：TU443[建筑科学—岩土工程]