Experimental study on permeability of coarse-grained soil

ZHOU Zhong; FU He-lin; LIU Bao-chen

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Experimental study on permeability of coarse-grained soil

更新时间：2026-06-25

- Experimental study on permeability of coarse-grained soil
- Vol. 27, Issue S2, (2006)
- 作者机构：
  
  中南大学土木建筑学院,长沙,410075
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU411.4
- Online First：16 December 2006，
  
  Published：2006
- 稿件说明：
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ZHOU Zhong, FU He-lin, LIU Bao-chen. Experimental study on permeability of coarse-grained soil[J]. 2006, 27(S2).
DOI：

ZHOU Zhong, FU He-lin, LIU Bao-chen. Experimental study on permeability of coarse-grained soil[J]. 2006, 27(S2). DOI：

摘要

粗粒土作为土和块石的介质耦合体，具有非均质性、非连续性及试样的难以采集性等内在的独特性质，从而给研究带来极大的困难。粗粒土属于典型的多孔介质，其渗透特性与砾石的百分含量关系密切。利用自制的常水头渗透仪，测定了不同含砾量时粗粒土渗透系数值，研究发现含砾量与粗粒土渗透系数之间存在指数关系。在工程设计中可以通过合理调整粗粒土砾石的含量，达到控制其渗透性能的目的。基于幂平均法，提出了粗粒土复合渗透系数的计算公式，并通过试验结果验证了该式的正确性，为粗粒土渗透系数的理论计算提供了一个简明实用的计算工具。

Abstract

As a mixture of soil and rock medium

coarse-grained soil has the inherent unique nature of inhomogeneity

discontinuity and difficulty of sampling

so as to bring about great difficulty in study. Coarse-grained soil is a typical porous medium

and its permeability is closely related to the content of gravel. Using home-built constant head permeameter

we mensured the permeability coefficient of coarse-grained soil of different gravel contents

and found that there exists index relationship between them. Changing gravel content rationally is a feasible method to control the permeability of coarse-grained soil in engineering. An empirical formula for calculating the composite permeability coefficient of soil and rock mixture is put forward based on power averaging method; and the formula is verified by the experimental results; and it provides a concise and useful computational tool for the theoretical calculation of coarse-grained soil permeability coefficient.

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