砾石含量及粒径对崩岗崩积体渗透特性的影响

发布时间：2018-06-28 17:40

本文选题：崩岗 + 崩积体　；参考：《水土保持学报》2017年03期

【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9~10min之间,40%,50%砾石含量崩积体进入稳定时间在19~20min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2~3,3~5,5~10mm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3~5mm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]:In order to study the influence of gravel on the permeability of avalanche, the influence of gravel content and particle size on the infiltration characteristics of avalanche was studied by means of annular knife method. The results are as follows: (1) the time of entering steady infiltration time of 30% gravel content and 30% gravel content is between 40% and 50% gravel content in 9~10min. (2) under the condition of the same size of gravel, the initial infiltration rate and the stable permeability rate of the caving body are obtained. The average infiltration rate and infiltration amount increase with the increase of gravel content, the infiltration parameters of the gravel caving body containing 2J _ (3) C _ (3) and (5) ~ (5) ~ (5) ~ (10) mm have little change when the gravel content is 10 ~ 20%, and when the gravel content is 40%, the infiltration parameter decreases with the increase of the gravel particle size, and the average infiltration rate and infiltration amount increase with the increase of the gravel content, and the mean infiltration rate and infiltration rate increase with the increase of gravel content. When the gravel content is 50, the infiltration parameters of the aggregates containing 3~5mm gravel are the minimum. (3) Kostiakov's formula is more suitable for simulating the infiltration model of the avalanche.
【作者单位】：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;
【基金】：国家科技支撑计划项目(2014BAD15B0303) 国家自然科学基金项目(41571272) 福建省自然科学基金项目(2015J01156)
【分类号】：S157.1

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