文献类型：期刊文献

英文题名：Analysis of the Critical Hydraulic Condition of Subterranean Soil Erosion and Its Factors

作者：Jiang, Fuwei Guan, Zhengde

第一作者：姜伏伟

通信作者：Jiang, FW[1]|[144404e4a79bdaa84b263]姜伏伟;[14440bda2e96262ed9844]姜伏伟;

机构：[1]Guizhou Inst Technol, Guiyang 550003, Peoples R China;[2]Chinese Acad Geol Sci, Inst Karst Geol, Guilin 541004, Peoples R China

第一机构：贵州理工学院

通信机构：corresponding author), Guizhou Inst Technol, Guiyang 550003, Peoples R China.|贵州理工学院;

年份：2020

卷号：38

期号：6

起止页码：6601-6609

外文期刊名：GEOTECHNICAL AND GEOLOGICAL ENGINEERING

收录：EI(收录号：20202908947950);Scopus(收录号：2-s2.0-85087886507);WOS:【ESCI(收录号:WOS:000548494900001)】；

基金：This work is supported by Guizhou province science and technology planning project, China (No.[2016]2846 and No.[2017]5789).

语种：英文

外文关键词：Subterranean soil erosion; Pipe flow; Hydraulic condition; Pore diameter

摘要：Subterranean soil erosion is a common form of soil failure that is caused by groundwater seepage. In this paper, we present a subterranean soil erosion model ideally supposed as pipe flow with four conditions. By using the theories of pipe flow, its critical expressions are derived, including the critical flow quantity (Q(cr)), the critical velocity (V-cr), and the hydraulic gradient (I-cr). A simulating experiment is designed to testQ(cr)to calculate the other critical values. In a case study, 14 clay samples from Guiyang, Guizhou, China, are tested via a simulation experiment. As a result, the critical shear stress of samples is found to be 32.01 Pa. Furthermore, three critical values of suffusion, includingQ(cr),V(cr)andI(cr), are calculated with different diameters of soil pores by using the critical expressions. Analyzing the relationship among the values shows that the pore diameter and groundwater temperature influence the critical hydraulic condition of subterranean soil erosion.