摘要
砂土渗透破坏的本质是水土相互作用的结果,由于土体内部单个颗粒的实际受力情况差异较大,影响土体管涌破坏的参数的研究甚少。利用自主改进组装的渗透破坏试验装置,进行了一系列砂土室内渗透破坏试验,采用误差及回归方程方法研究了颗粒级配、约束应力等对砂土渗透破坏特性的影响,得出了试样渗透破坏过程中涌砂量、渗流流速、水头差等的变化规律。试验结果表明:在应力为150 kPa,最大粒径为5 mm时,管涌破坏的流沙量达到最小值;基于试验数据,研究了砂土管涌破坏过程中管涌参数的变化规律以及管涌侵蚀机理,为管涌险情的预警预报进一步提供科学的理论依据。
The essence of seepage failure of sand and soil is the result of soil and water interaction. In this paper, a series of indoor seepage failure tests of sand were carried out, and the particle gradation was studied by means of error and regression equation method.The influence of confined stress on the seepage failure characteristics of sand soil was studied. The variation rules of sand gushing, flow velocity and head difference wereobtained. The experimental results showed that when the stress was 150 kPa and the maximum particle size was 5 mm, the quicksand caused by piping failure was minimized. Based on the experimental data, the variation law of piping parameters and the mechanism of piping erosion were studied, which could provide a scientific theoretical basis for the early warning and prediction of piping danger.
作者
穆林钧
钟加录
Lim Jeong Yeul
金光日
MU Linjun;ZHONG Jialu;LIM JeongYeu;JIN Guangr(Civil Engineering of Engineering College Yanbian University,Yanji 133002,China;K-water Institute,Infrastructure Research Center,Korea)
出处
《人民珠江》
2018年第7期57-62,共6页
Pearl River
基金
延边大学创新创业训练计划项目(ydcxcy2018191)
关键词
砂土
渗透破坏
参数
侵蚀机理
管涌
sand soil
seepage failure
parameters
erosion mechanisnl
piping
