文献类型：期刊文献

英文题名：Characterisation of geomembrane and geotextile interface short-term creep behaviour in a dry condition

作者：Lu, Yi Abuel-Naga, Hossam Leong, Eng-Choon Jiao, Wei-Guo Wang, Xing

第一作者：Lu, Yi

通信作者：Wang, X[1]

机构：[1]Guangzhou Univ, Sch Civil Engn, Guangzhou, Peoples R China;[2]La Trobe Univ, Civil Engn Discipline, Melbourne, Vic, Australia;[3]Nanyang Technol Univ, Sch Civil & Environm Engn, Singapore, Singapore;[4]Guizhou Inst Technol, Sch Civil Engn, Guiyang, Guizhou, Peoples R China

第一机构：Guangzhou Univ, Sch Civil Engn, Guangzhou, Peoples R China

通信机构：corresponding author), Guangzhou Univ, Sch Civil Engn, Guangzhou, Peoples R China.

年份：2022

卷号：50

期号：2

起止页码：312-322

外文期刊名：GEOTEXTILES AND GEOMEMBRANES

收录：;EI(收录号：20214911275986);Scopus(收录号：2-s2.0-85120431319);WOS:【SCI-EXPANDED(收录号:WOS:000751815200002)】；

基金：This work was supported by the National Natural Science Foundation of China (Grant Nos. 52108310, 52069005) and Guangdong Basic and Applied Basic Research Foundation (Nos. 2020A1515110663, 202102020914) .

语种：英文

外文关键词：Geosynthetics; Geotextiles; Geomembranes; Interface creep; Landfill

摘要：This study aims to characterise the interface creep behaviour between geomembrane and geotextile (i.e. GM-GT) in the liner system. Two types of GM (i.e. smooth SGM and textured TGM) and two types of GT (i.e. nonwoven NWGT and woven WGT) were investigated using the conventional direct shear apparatus for four combinations of GM-GT. The interface friction angles (oin) between GM-GT were firstly determined at the normal stresses (an) of 25, 50, 100 and 200 kPa. The results show that TGM-NWGT has a much larger oin (23.9 degrees) than the other three combinations which ranged from 9.5 degrees to 11.1 degrees. Subsequently, creep tests were conducted at three shear stress (z) levels (i.e., 30, 50 and 70% of the peak stress (zp) under each normal stress). The creep test results of the four combinations were analysed and a power equation of time was used to estimate creep displacement (delta cp). The coefficients A and B in the power equation were found to be functions of Young's modulus of the composite material (Ec), time, an, z, zp, and oin. The tertiary creep stage was not observed in the test and it is recommended that longer duration GM-GT interface creep tests should be conducted for in-depth understanding of the interface creep mechanism.