碎石土斜坡优先流渗流特征试验  

Experimental study on seepage characteristics of preferential flow in the gravel soil slope

作　　者：沈辉[1,2] 罗先启[1] 李显平 

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240 [2]九江学院土木与城建学院,江西九江332005 [3]中冶集团武汉勘察研究院有限公司,湖北武汉430080

出　　处：《水利水电科技进展》2012年第2期57-61,88,共6页Advances in Science and Technology of Water Resources

基　　金：国家自然科学基金(50979055)

摘　　要：为研究碎石土斜坡在雨水作用下的渗流特性,以2种不同级配的碎石土为坡体模型材料,利用自行设计的模型槽开展雨水作用下优先流渗流特征的试验研究。试验模拟降雨入渗及地下水变化,在碎石土斜坡内部生成浅层孔隙及深层管道网络,采用染色示踪技术结合图像处理分析碎石土斜坡内部大孔隙流、管流以及漏斗流的渗流特征及成因。试验结果表明,采用室内试验方法模拟降雨及地下水变化,对于展现坡体内部与外界水分动态交换过程,研究优先流非均匀流动特性是一种非常有效的手段。In order to study the seepage characteristics of gravel soil slope under the action of rainwater,a self-designed model slot is applied to carry out the seepage experiment,taking two different gradations of gravel soils as model materials of the slope.The percolation properties of preferential flow and underground water change under the action of rainwater are simulated in the experiment,which successfully generate shallow pore and deep tunnel net inside the gravel slope.The dye tracing technology combined with image treatment are adopted to analysis the seepage characteristics and causes of the internal macropore low,pipe flow and funnel flow of the gravel slope.Test results show that carrying out laboratory tests to simulate rainfall infiltration and underground water change is an effective approach to disclose the dynamic exchange process of internal and external water of the gravel soil slope and to discuss the non-uniform percolation properties of preferential flow.

关 键 词：碎石土斜坡 优先流 渗流特征 试验研究 

分 类 号：TU411.4[建筑科学—岩土工程]