文献类型：期刊文献

英文题名：Discussion of the pipe flow model to analyze the critical parameter of seepage erosion forming sinkholes in Liuzhou, China

作者：Jiang, Fuwei

第一作者：Jiang, Fuwei

通信作者：Jiang, FW[1];Jiang, FW[2]|[144404e4a79bdaa84b263]姜伏伟;[14440bda2e96262ed9844]姜伏伟;

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

第一机构：Chinese Acad Geol Sci, Inst Karst Geol, Guilin 541004, Peoples R China

通信机构：corresponding author), Chinese Acad Geol Sci, Inst Karst Geol, Guilin 541004, Peoples R China;corresponding author), Guizhou Inst Technol, Sch Resources & Environm Engn, Guiyang 550003, Peoples R China.|贵州理工学院资源与环境工程学院;贵州理工学院;

年份：2019

卷号：78

期号：3

起止页码：1417-1425

外文期刊名：BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT

收录：;EI(收录号：20180504698569);Scopus(收录号：2-s2.0-85041242629);WOS:【SCI-EXPANDED(收录号:WOS:000463751500008)】；

基金：This work is supported by the social development fund of the support plan projects of Guizhou Science and Technology Department, China (No. [2016]2846).

语种：英文

外文关键词：Sinkholes; Seepage erosion; Pipe flow model; Critical shear stress; Critical velocity

摘要：On May 10th, 2012, 41 sinkholes collapsed the southern suburbs of Liuzhou, Guangxi Province, China, damaging 143 houses, eight factories buildings, and three commercial buildings. Lei (2013) revealed that groundwater dynamics, contributed to by the daily rainfall of 169.7mm, led to soil particles running off (seepage erosion) resulting in the sinkholes. It is crucial to identify the critical parameters of seepage erosion that forms sinkholes. This paper analyzes critical parameters in the study site, establishes the pipe flow model of seepage erosion, and deduces parameter expression using its theories. We devised experimental equipment designed to simulate the process of seepage erosion and test the critical shear stress ((cr)) of soil samples from the field. Additionally, we measured the diameter (d) of pores in the field soil using a scanning electron microscope, and calculated the critical groundwater velocity (V-cr). As the result, we found that the collapsed sinkholes in the study site were formed by groundwater with a velocity of 7.652x10(-5)m/s (or 0.459cm/min).