期刊论文

中文

科学技术与工程

1671-1815

2018

18

9

295-302

10.3969/j.issn.1671-1815.2018.09.046

国家自然科学基金（11602183）； 武汉轻工大学2017大学生科研项目共同资助；

本校为第一机构

在大气降雨和蒸发的作用下,膨胀土体收缩产生大量无序破裂裂隙,水分易向土体深部渗透,裂隙性膨胀土比同类非开裂土体具有更大的渗透性,容易使膨胀土地区的边坡滑坡。常规试验中采用完整的土样进行渗透试验,量测出的渗透系数与实际裂隙存在的膨胀土渗透性有数量级上的差异,为反映裂隙膨胀土的真实渗透性,对不同初始含水率相同压实度、相同初始含水率不同压实度的两组裂隙膨胀土样进行室内模拟降雨实验,研究其在降雨入渗条件下的渗透规律,得出以下结论:（1）不同压实度膨胀土样脱湿后都形成以宽、细裂隙构成的裂隙网络,表面裂隙形态各不相同,总体上随压实度降低土样主裂隙有由开放向连通闭合的趋势...

In the role of atmospheric precipitation and evaporation,expansive soil shranked and produced a lot of random crack,water easy penetrated to deep soil,fissured expansive soil similar has larger permeability than non cracked soil,easy to make the landslide happen in the expansive soil area.In the conventional tests,the permea-bility coefficient of the soil samples was determined by using the full soil samples,and the permeability of the ex-pansive soil was found to be different from the actual.In order to reflect the true permeability of cracked...