Research on capillary pressure-saturation curve for a single fracture in an unsaturated fractured mass

LI Kang-hong; CHAI Jun-rui

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Research on capillary pressure-saturation curve for a single fracture in an unsaturated fractured mass

更新时间：2026-06-25

- Research on capillary pressure-saturation curve for a single fracture in an unsaturated fractured mass
- Vol. 27, Issue 8期　刊出日, (2006)
- 作者机构：
  
  1. 西安理工大学水电学院,西安,710048
  2. 三峡大学土木水电学院,宜昌,443002
- 作者简介：
- 基金信息：
- DOI：
  CLC： P641.135
- Online First：26 November 2013，
  
  Published：2006
- 稿件说明：
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LI Kang-hong, CHAI Jun-rui. Research on capillary pressure-saturation curve for a single fracture in an unsaturated fractured mass[J]. 2006, 27(8期　刊出日).
DOI：

LI Kang-hong, CHAI Jun-rui. Research on capillary pressure-saturation curve for a single fracture in an unsaturated fractured mass[J]. 2006, 27(8期　刊出日). DOI：

摘要

在进行裂隙岩体非饱和渗流研究中，选用合理的裂隙岩体毛管压力-饱和度关系曲线非常关键。基于裂隙岩体非饱和渗流特点，简述当前国内外非饱和裂隙岩体毛管压力-饱和度关系曲线模型的研究状况。总结出非饱和裂隙渗透具有毛细管流、薄膜流、优先流、裂隙-基质相互作用和沟槽流特点；分析了建立单裂隙岩体非饱和渗流毛管压力-饱和度关系曲线模型的主要方法，包括物模试验法、数值计算法和数学推导法，并归纳这些方法的计算结果；最后，结合渗流特点，对各种曲线模型结果进行比较，进一步分析得出：(1) 目前的曲线关系均建立在毛管理论基础之上，几乎没有反映渗流其他特点的关系曲线；(2) 运用数值计算法和数学推导建立曲线模型较为简便；(2) 在排水曲线初始时段，Brooks-Corey(BC)模型模拟得到的结果比van Genuchten(VG)模型要好些，而在末尾时段VG模型要好些。

Abstract

It is an issue to choose an appropriate capillary pressure-saturation curve in the research of unsaturated fractured mass. Based on the characteristic of the unsaturated fractured mass

the research on the capillary pressure-saturation curve in an unsaturated fractured mass is summarized. It can be seen that seepage in an unsaturated fractured mass has some special characteristics including capillary flow

film flow

preferential flow and facture-matrix interaction; three methods to establish the capillary pressure-saturation curve

including physical laboratory

numerical simulation and mathematical computation; and all the results of these methods are also summarized. Finally

according to the characteristics of the seepage in an unsaturated rock mass and all these result of the capillary pressure-saturation curve

the following results can be concluded: (1) there is no capillary pressure-saturation curve which can reflect the other characters of the seepage in unsaturated rock mass except the capillary flow; (2) it is a convenient method to build the capillary pressure-saturation curve by numerical simulation and mathematical computation; (3) the capillary pressure-saturation curve simulated by Brooks-Corey(BC) model is better than by van Genuchten(VG) at initial stage during drainage

but worse at the last stage.

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Related Author

LI Kang-hong1

CHAI Jun-rui1

HUANG Rui

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FANG Kai

LIU Zhi-jun

XU Wei-sheng

ZHOU Chuang-bing

Related Institution

College of Civil and Hydropower Engineering,China Three Gorges University

三峡大学土木水电学院

MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University

Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University

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