【摘要】 为探究局部粗颗粒富集现象对降雨在堆积体中入渗过程的具体影响和机理,文章采用对坡体模型进行室内降雨的方法,对局部粗颗粒富集现象对降雨入渗的影响机理展开分析和研究,得出以下认识和结论:堆积体中粗颗粒富集区域可以汇聚在强降雨过程中形成的坡表径流;汇聚于粗颗粒区的地表水可在周围的土体颗粒和孔隙上形成较高的孔隙水压力,增大了水分向周围土体渗透的水力梯度,从而促使水分能够更快地入渗至深部土体;汇聚于粗颗粒区的地表水为水分入渗至周围土体提供了稳定性的补给源,提高了水分入渗至土体深部的可能性。更多还原

【Abstract】 In order to analyze the specific influence and mechanism of local coarse particle enrichment on rainfall infiltration process in the deposits,this paper adopted indoor rainfall experiment to analyze the influence mechanism of local coarse particle enrichment phenomenon on rainfall infiltration. The results are as follows: the surface water gathered in the coarse particles enriched area can form a higher pore water pressure on the surrounding soil particles and pores,and increase the hydraulic gradient of water,which result in faster infiltration into the surrounding soil. The surface water gathered in the coarse particles area provided a stable supply source of water infiltration into the surrounding soil and improves the possibility of rainfall water infiltration into the deep soil of the deposits.更多还原