砾石覆盖对土壤入渗特性影响的试验研究  

The Influence of Rock Fragment Cover on Soil Infiltration Properties

作　　者：房凯 郑加兴 张俐 李紫纯 赵瑜 FANG Kai;ZHENG Jia-xing;ZHANG Li;LI Zi-chun;ZHAO Yu(Suqian Water Conservancy Bureau, Suqian 223800, Jiangsu Province, China;Shanghai Waterway Engineering Design and Consulting Co. Ltd, Shanghai 200120,China;College of Agricultural Engineering, Hohai University, Nanjing 210098, China)

机构地区：[1]江苏省宿迁市水务局,江苏宿迁223800 [2]中交上海航道勘察设计研究院有限公司,上海200120 [3]河海大学农业工程学院,南京210098

出　　处：《中国农村水利水电》2020年第2期100-104,共5页China Rural Water and Hydropower

基　　金：国家自然科学基金(51679062);江苏省水利科技项目(2018051)。

摘　　要：土壤水分入渗过程复杂,砾石覆盖可在不同程度上影响土壤水分运动过程。通过进行砾石表层覆盖入渗试验和土石混合覆盖入渗试验,研究砾石覆盖对土壤入渗特性的影响。结果表明:在砾石覆盖与土石混合试验中,土壤稳定入渗率、吸渗率、导水率及土壤有效孔隙度均随砾石覆盖度和土石混合度增大而减小,且在不同砾石覆盖度和土石混合度的入渗试验中相关参数变化差异显著(P<0.05)。随碎石含量增加,土壤有效孔隙度减小,水分运动通道曲折复杂从而限制水分入渗。土石混合试验中土壤吸渗率、导水率及土壤有效孔隙度随土石混合度增大而降低的程度均高于砾石表层覆盖试验。镶嵌在地表和土壤剖面中的碎石能够改变土壤持水特性,深入研究砾石对土壤入渗特性的影响,可为工程废弃砾石重复利用于边坡防护提供理论依据。Soil infiltration is a complicated process,and the rock fragment cover will affect soil infiltration properties.In this paper,the related parameters of soil infiltration properties are analyzed through gravel covering experiment and soil-gravel mixing experiment.The results show that the stable infiltration rate,sorptivety,hydraulic conductivity and soil effective porosity decrease with the increase in gravel coverage soil-gravel mixing degree.In the infiltration of different gravel coverage soil-gravel mixing degree,the variation of relative parameters is significant(P<0.05).This shows that the effective porosity of the soil decreases with the increase in the gravels,and the water movement channel is so complicated as to limit the infiltration of water.In the soil-gravel mixing experiment,sorptivety,hydraulic conductivity and soil effective porosity decreases sharply with the increase in gravel coverage soil-gravel mixing degree,which is higher than those in the gravel covering experiment.The gravels in the soil can change the soil infiltration properties.Studying the effect of gravel on soil infiltration characteristics further is of practical significance.It is significant to study the possibility of using the rock fragment cover to maintain soil and water for engineering slopes.

关 键 词：砾石覆盖 土壤入渗特性 土石混合 边坡防护 土壤吸渗率 土壤导水率 土壤入渗试验 土壤孔隙度 

分 类 号：TV93[水利工程—水利水电工程] S152.72[农业科学—土壤学]