降雨入渗条件下炭质泥岩填料渗透侵蚀试验研究
Experimental study on seepage erosion of carbonaceous mudstone filler under rainfall infiltration conditions
摘要
Abstract
To investigate the permeation erosion characteristics of carbonaceous mudstone fill,a large-scale seepage test apparatus independently developed was used to conduct permeation erosion tests on carbonaceous mudstone filled with different stone contents in gradually increasing hydraulic gradient conditions.The variation rules of permeability coefficient,fine particle erosion amount and local hydraulic gradient of carbonaceous mudstone filled with different stone contents were analyzed,and the particle gradation of the fill before and after the test was compared to reveal the evolution law of permeation erosion of carbonaceous mudstone fill.The results show that under the same hydraulic gradient,with the increase of the stone content,the permeability coefficient of the specimen first decreases and then increases,reaching the minimum when the stone content is 40%.The critical failure hydraulic gradient corresponding to the permeation failure of the specimen decreases with the increase of the stone content,and when the stone content is 70%,the critical failure hydraulic gradient is only 22.5%of that when the stone content is 30%.The cumulative erosion of fine particles increases significantly with the increase of hydraulic gradient.According to the change law of erosion rate over time,the permeation erosion process is divided into three stages,i.e.the rapid erosion stage,the slow erosion stage and the seepage failure stage.During the rapid erosion phase,fine-grained material accounts for 50%-60%of the total erosion volume.Along the seepage direction,the loss of fine particles within the specimen shows a significant non-uniform distribution,which can be divided into three zones,i.e.,the top active loss zone,the central dynamic equilibrium zone and the bottom secondary loss zone.The research results can provide theoretical support for the prevention and control of disasters in embankment projects caused by permeation erosion of carbonaceous mudstone fill.关键词
炭质泥岩/含石量/渗透系数/水力梯度/渗透侵蚀Key words
carbonaceous mudstone/stone content/permeability coefficient/hydraulic gradient/seepage erosion分类
交通工程引用本文复制引用
付宏渊,王沿,曾铃,李涛,唐静,陈镜丞,查焕奕..降雨入渗条件下炭质泥岩填料渗透侵蚀试验研究[J].中南大学学报（自然科学版）,2026,57(5):2208-2219,12.基金项目
国家自然科学基金资助项目(52378440) （52378440）
交通运输行业重点科技计划项目(2022-MS1-032) （2022-MS1-032）
湖南省自然科学基金资助项目(2023JJ10045) （2023JJ10045）
国家自然科学基金青年科学基金资助项目(52408458) （52408458）
湖南省自然科学基金青年基金资助项目(2025JJ60344) （2025JJ60344）
湖南省研究生创新项目(CX20230857)(Project(52378440)supported by the National Natural Science Foundation of China （CX20230857）
Project(2022-MS1-032)supported by the Key Science and Technology Program Projects in the Transportation Industry （2022-MS1-032）
Project(2023JJ10045)supported by the Natural Science Foundation of Hunan Province （2023JJ10045）
Project(52408458)supported by the National Natural Science Foundation of China(Young Scientists Fund) （52408458）
Project(2025JJ60344)supported by the Young Scientists Fund of the Natural Science Foundation of Hunan Province （2025JJ60344）
Project(CX20230857)supported by the Graduate Student Innovation Project of Hunan Province) （CX20230857）
