期刊论文

Progress on Seepage of Fissured Expansive Soil Research

中文

土工基础

1004-3152

2019

33

05

587-590

国家自然科学基金（11602183）资助；

本校为第一机构

膨胀土在反复干湿循环中,吸水膨胀失水收缩,先出现主裂隙逐步发展更多的次裂隙,最后把土体分割成碎块。蒸发速度、含水率梯度、试样的水分蒸发量等是影响裂隙发育的主要因素。采用拍照法可得到二维平面上裂隙情况,通过处理图像和三维建模可得到空间裂隙情况。介绍了几种裂隙渗流模型的研究现状,分析了各自的优缺点,等效连续介质渗流模型应用最为广泛。裂隙的存在为渗流提供了通道,膨胀土渗流应考虑裂隙的影响。

Expansive soil in the repetitive wet-dry cycle,the volumetric expansion occurs by water absorption and contraction when the moisture is lost,and cracks are generated in the soil body.This paper summarizes the process of crack generation:Major cracks are formed,and more secondary fissures are generated,and soil body are separated by various fissures.The development of the fissures is associated with the moisture evaporation rate,gradient of moisture content,and quantity of the moisture evaporation.With the continuous development of measuring instruments,more accurate fissure development can be ...