Effects of Content and Size of Gravel on Soil Permeability of the Colluvial Deposit in Benggang

doi:10.13870/j.cnki.stbcxb.2017.03.015

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Effects of Content and Size of Gravel on Soil Permeability of the Colluvial Deposit in Benggang

更新时间：2025-03-12

- Effects of Content and Size of Gravel on Soil Permeability of the Colluvial Deposit in Benggang
- Vol. 31, Issue 3, Pages: 85-90(2017)
- 作者机构：
  
  福建农林大学资源与环境学院，福建省土壤环境健康与调控重点实验室,福州,350002
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2017.03.015
  CLC： S157.1
- Published：2017
- 稿件说明：
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Effects of Content and Size of Gravel on Soil Permeability of the Colluvial Deposit in Benggang[J]. 2017, 31(3): 85-90.
DOI：

Effects of Content and Size of Gravel on Soil Permeability of the Colluvial Deposit in Benggang[J]. 2017, 31(3): 85-90. DOI： 10.13870/j.cnki.stbcxb.2017.03.015.

摘要

为探讨砾石对崩积体渗透性的影响，采用环刀法对不同砾石含量及粒径条件下崩积体入渗特性的变化进行研究。结果表明：（1）0%，10%，20%，30%砾石含量崩积体进入稳渗时间在9~10 min之间，40%，50%砾石含量崩积体进入稳定时间在19~20 min之间。（2）相同粒径砾石条件下，崩积体的初渗率、稳渗率、平均入渗率及入渗量随砾石含量的增加而增大；含2~3，3~5，5~10 mm砾石崩积体的入渗参数在10%，20%，30%砾石含量时变化不大；当砾石含量为40%时，入渗参数随着砾石粒径的增大而减小；当砾石含量为50%时，含3~5 mm砾石的崩积体的入渗参数最小。（3）Kostiakov公式拟合更适合模拟崩积体的入渗模型。

Abstract

The aim of this study was to explore the influence of gravel on infiltration characteristics of the colluvial deposit. The cutting ring method was used to study the changes of infiltration characteristics of the colluvial deposit that mixed with different content and size of gravel. The results were as follows: (1) The steady infiltration time of the colluvial deposit was between 9 and 10 min when the content of gravel was 0%

10%

20%

and 30%

but it was between 19 and 20 min when the content of gravel was 40% and 50%. (2) The initial infiltration rate

steady infiltration rate

average infiltration rate

and accumulative infiltration volume of the colluvial deposit were enhanced with the increasing gravel content. The infiltration parameters changed little at 10%

20%

and 30% gravel content when the colluvial deposit was mixed with gravels of of 2-3 mm

3-5 mm

and 5-10 mm size. The values of infiltration parameters decreased with increasing size of gravels when the gravel content was 40%; when the gravel content was 50%

the values of infiltration parameters of the colluvial deposit mixed with 2-3 mm gravel were the least. (3) A further comparison showed that the Kostiakov model was more suitable for simulating the infiltration process of the colluvial deposit.

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