砂穴式入渗初步试验研究  

A primary tentative study on sand hole infiltration

作　　者：刘继朝[1] 高业新[1] 冯欣[1] 张冰[1] 张英平[1] 张亚哲[1] 

机构地区：[1]中国地质科学院水文地质环境地质研究所,石家庄050061

出　　处：《南水北调与水利科技》2018年第5期193-199,共7页South-to-North Water Transfers and Water Science & Technology

基　　金：中国地质科学院基本业务费项目(YYFM201624)~~

摘　　要：以双重介质渗流理论为基础,借鉴复合地基施工技术,选取冲积砂、河砂等作为试验填充材料,在粉砂、中砂地层中开展砂穴式入渗试验,研究了砂穴这一入渗方式的入渗效率。结果表明:分选好的多孔介质更适宜作为砂穴填料;河砂作为填料比冲积砂入渗效果更好;入渗效率受受水介质影响明显。在不同岩性中利用穴式入渗,入渗效率明显不同。中砂地层的入渗效率是粉砂地层的7.6倍,是粉砂地表入渗的48.1倍。在同一岩性中利用不同的入渗方式,其入渗效率有很大差距。在粉砂地层中利用穴式入渗,其入渗效率是粉砂地表的6.3倍。砂穴式入渗是一种可以加快入渗速率可操控性的技术方法,它将促进渗流理论转化为减轻雨洪灾害的技术形成生产力服务于城市(或者山区)洪涝减灾,提高水资源的有效利用水平,促进水循环体系自我恢复和良性发展。According to the double porosity media flow theory and the construction technology of composite foundation,with alluvial sand and river sand as experimental padding,we carried out a sand hole infiltration test in the silt and medium sand strata,and studied the efficiency of sand hole infiltration.The results showed that the separated porous media was more suitable for filling sand holes.River sand was more effective as padding than alluvial sand.Infiltration efficiency was obviously affected by aqueous medium.Using sand hole infiltration for different lithological characteristics showed obviously different infiltration efficiency.The infiltration efficiency of medium sand stratum was 7.6 times of that of the silt stratum and 48.1 times of that of the silt surface.Using different infiltration modes for the same lithological characteristic also showed very different infiltration efficiency.The infiltration efficiency of silt stratum was 6.3 times of that of the silt surface.Sand hole infiltration is a manageable technical method which can speed up the infiltration rate.It will promote the conversion of the percolation theory into technologies for alleviating flood disasters in urban or mountainous areas.It will enhance the effective utilization of water resources,and promote the self-recovery and healthy development of water cycle system.

关 键 词：包气带 砂穴式入渗 受水介质 入渗效率 入渗速率 

分 类 号：TU992[建筑科学—市政工程]