土工基础

›› 2019, Vol. 33 ›› Issue (5): 587-590.

• 工程实录 • 上一篇    下一篇

裂隙膨胀土渗流研究进展

刘瑞雪，张荣堂，汪为巍   

  1. （武汉轻工大学，武汉 430071）
  • 收稿日期:2019-01-07 修回日期:2019-02-28 出版日期:2019-10-20 发布日期:2019-10-22
  • 作者简介:刘瑞雪（1994-），女，硕士研究生，研究方向为非饱和土力学特性。
  • 基金资助:

    国家自然科学基金（11602183）资助

Progress on Seepage of Fissured Expansive Soil Research

LIU Ruixue, ZHANG Rongtang, WANG Weiwei   

  1. (Wuhan Polytechnic University, Wuhan 430071)
  • Received:2019-01-07 Revised:2019-02-28 Online:2019-10-20 Published:2019-10-22

摘要： 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。

关键词: 裂隙膨胀土, 渗流, 渗流模型, 研究进展

Abstract: 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 observed. Imaging processing method is widely used to obtain two-dimensional plane fissure distribution. Spatial fissure distribution can be obtained by processing images and three-dimensional modeling. The review of several fissure seepage models is introduced, and their advantages and disadvantages are discussed. The equivalent continuum seepage model is widely used.

Key words: Fissured Expansive Soils, Seepage Flow, Seepage Model, Research Progress