邯郸复兴区膨胀土膨胀特性尺寸效应试验研究  

Experimental study on expansive characteristics and its size effect of expensive soil in Fuxing district of Handan

作　　者：王晓磊[1] 杨士萱 史三元[1] 

机构地区：[1]河北工程大学土木工程学院,河北邯郸056038

出　　处：《河南理工大学学报（自然科学版）》2018年第2期133-137,共5页Journal of Henan Polytechnic University（Natural Science）

基　　金：国家自然科学基金资助项目(51274126);河北省教育厅青年基金资助项目(QN2014070)

摘　　要：为解决膨胀土在建筑工程领域带来的危害,制作15,20,25 mm 3个高度邯郸膨胀土试样,研究了试样高度对膨胀特性的影响。利用控制变量的方法对不同尺寸的邯郸重塑膨胀土试样进行膨胀力和膨胀率试验。结果表明:试验高度范围内,在K0应力状态下,随着试样高度增加,膨胀力呈线性增加,试样高度每增加1 mm,膨胀力增大1.92 k Pa,膨胀土试样浸水过程产生的膨胀力不存在尺寸效应;随着试样高度增加,膨胀率的增长速度随之加快,膨胀率随着试样高度增加而增大,试样高度每增长1 mm,膨胀率约提高1.06%,膨胀率存在明显的尺寸效应。该研究结论可为区域性膨胀土区建筑工程的安全性和稳定性提供参考依据。Three kinds of height sample（ i. e. 15 mm, 20 mm and 25 mm were made which height were 15 mm,20 mm and 25 mm. The expansive force and rate of remolded expansive soils in Handan were tested. The influence of specimen height on the expansive characteristics was analyzed. The results stress state, the expansive force increased linearly along with the increase of specimen height in the testheight. The expansive force increases 1. 92 kPa when the height of sample increases per 1 mm. The expansiveforce had no size effect during the wetting process. However, along with the increase of sample height,thegrowth rate of the free expansive ratio increases correlatively. The expansive rate of expansive soil the height of the specimen. When the height of sample increased per 1 mm,thebout 1. 06% and the expansion rate had an obvious size effect.

关 键 词：膨胀特性 尺寸效应 膨胀力试验 重塑膨胀土 

分 类 号：TU411[建筑科学—岩土工程]