Study of saturated/unsaturated hydraulic conductivity of a random crack

LI Jin-hui; CAI Cheng-zhi

English Version Journal Login

您当前的位置：

首页 >

文章列表页 >

Study of saturated/unsaturated hydraulic conductivity of a random crack

更新时间：2026-06-25

- Study of saturated/unsaturated hydraulic conductivity of a random crack
- Vol. 33, Issue 9, (2012)
- 作者机构：
  
  1. 哈尔滨工业大学深圳研究生院土木与环境工程学院,广东,深圳,518055
  2. 上海中房建筑设计有限公司,上海,200021
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU411
- Online First：12 September 2012，
  
  Published：2012
- 稿件说明：
移动端阅览
LI Jin-hui, CAI Cheng-zhi. Study of saturated/unsaturated hydraulic conductivity of a random crack[J]. 2012, 33(9).
DOI：

LI Jin-hui, CAI Cheng-zhi. Study of saturated/unsaturated hydraulic conductivity of a random crack[J]. 2012, 33(9). DOI：

摘要

裂隙易在降雨作用下诱发滑坡等灾害，裂隙的饱和/非饱和渗透特性是研究此类问题的关键。利用精密数控机床制作随机粗糙裂隙面，并研制了一套仪器进行此随机粗糙裂隙的渗流试验，得到了裂隙的饱和渗透系数，然后通过间接方法预测此裂隙的非饱和渗透系数。研究发现，当裂隙平均开度为0.4 mm时，其饱和渗透系数为0.1 m/s。通过立方定律得到的水力等效隙宽为0.35 mm，小于其平均隙宽。同时裂隙的渗透系数与平均隙宽的平方成正比，这与立方定律的趋势相一致。研究得到了不同隙宽裂隙的非饱和渗透系数函数，当基质吸力小于进气值时，渗透系数为一常数，即为饱和渗透系数；当基质吸力大于进气值时，裂隙板的渗透系数急剧减小。当裂隙板的基质吸力达到其残余含水率对应的吸力值时，裂隙板的渗透系数基本稳定。在此情况下，基质吸力的继续增加对渗透系数的影响非常小，很难使渗透系数减小。

Abstract

The presence of cracks can trigger landslide after rainfall. The saturated/unsaturated hydraulic conductivity is a key parameter to study the slope stability. In this research a random crack is made using high-resolution machine. An apparatus is developed to conduct seepage experiment through the random crack; and the saturated hydraulic conductivity of the crack can be obtained. The unsaturated hydraulic conductivity is predicted using the saturated hydraulic conductivity and the soil water characteristic curve. Results show that the saturated hydraulic conductivity is 0.1 m/s when the average aperture of the random crack is 0.4 mm. The hydraulic effective aperture is 0.35 mm

which is smaller than the average aperture. The hydraulic conductivity is proportional to the square of the average aperture

which is consistent with the cubic law. The unsaturated hydraulic conductivity curve shows that the hydraulic conductivity decreases very fast when the matric suction is larger than the air entry value. When the matric suction reaches the suction corresponding to the residual water content the influence of matric suction on the hydraulic conductivity is limited. Finally

the hydraulic conductivity approaches a constant value.

关键词

Keywords

references

Views

2560

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

岩体裂隙结构模型及其渗流规律研究附视频

Numerical simulation of tunnel excavation considering fluid solid coupling

Experimental research of correlation on static and dynamic strength of unsaturated silty clay

Primary study of permeability of porous media

Single column offshore-wind energy structure ??Study on excess pore water pressures of sands under cyclic power

Related Author

4.221008

3.中国矿业大学建工学院!徐州

2.221008

1.中国矿业大学建工学院!徐州

贺永年

杨米加

CHENG Lin-song

LIU Jian-jun

Related Institution

Key Laboratory of Petroleum Engineering of Ministry of Education, China University of Petroleum

School of Civil Engineering and Architecture, Southwest Petroleum University

Institute of Geotechnical Engineering, School of Civil and Hydraulic Engineering, Dalian University of Technology

State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology

Key Laboratory of Soft Soils and Geoenvironmental Engineering, Ministry of Education, Zhejiang University

AI问答

⁰