文献类型：期刊文献

英文题名：Experimental investigation of cyclic wetting-drying effect on mechanical behavior of a medium-grained sandstone

作者：Li, Xiaoshuang[1,2,3];Peng, Kun[4];Peng, Jun[2,3,5];Hou, Di[6]

机构：[1]Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Peoples R China;[2]Sinosteel Maanshan Gen Inst Min Res Co Ltd, State Key Lab Safety & Hlth Met Mines, Maanshan 243000, Peoples R China;[3]Qilu Inst Technol, Coll Civil Engn, Jinan 250200, Peoples R China;[4]China Shipbldg NDRI Engn Co Ltd, Shanghai 200063, Peoples R China;[5]Univ Hong Kong, Dept Civil Engn, Hong Kong, Peoples R China;[6]Guizhou Survey & Design Res Inst Water Resources, Guiyang 550001, Peoples R China

年份：2021

卷号：293

外文期刊名：ENGINEERING GEOLOGY

收录：SCI-EXPANDED(收录号：WOS:000696814500049)、、EI(收录号：20232614308501)、Scopus(收录号：2-s2.0-85115209283)、WOS

基金：The research work presented in this paper is in part supported by the National Natural Science Foundation of China (Grant nos. 41702327, 41867033, and 51609178), the China Postdoctoral Science Foundation (Grant nos. 2019M650144 and 2018T110800), the Natural Science Foundation of Hubei Province (Grant no. 2018CFB593), open fund of State Key Laboratory of Safety and Health of Metal Mines (Grant no. zdsys2019-005), and the Open-end Research Fund of the State Key Laboratory for GeoMechanics and Deep Underground Engineering (Grant no. SKLGDUEK1709). The authors are grateful to these financial supports.

语种：英文

外文关键词：Sandstone; Cyclic wetting and drying; Uniaxial compression test; Direct shear test; Micro-structure evolution

外文摘要：As a typical form of weathering, cyclic wetting-drying treatment on host rock is commonly encountered in many applications of geotechnical engineering. How cyclic wetting-drying weathering affects the strength and deformation behavior of host rock is a topic worthy of comprehensively investigating. In this study, the influence of cyclic wetting-drying weathering on mechanical behavior of a medium-grained sandstone is experimentally investigated. The sandstone specimens are first subjected to different wetting-drying weathering cycles, and uniaxial compression tests and direct shear tests are then conducted on these prepared specimens. The results show that the water absorption of the rock monotonically increases with the increase of the number of wetting-drying cycle in the treatment. The strength and deformation properties (i.e., uniaxial compressive strength, Young's modulus, cohesion, and friction angle) are found to decrease with the increase of wetting-drying cycle in the treatment and the decrease gradually diminishes as the number of wetting-drying cycle becomes large. Upon failure of the rock specimen under both uniaxial compression and direct shear, the integrity is progressively weakened and more fragments can be observed as the number of wetting-drying cycle in the treatment gradually increases. The deterioration of rock strength and deformation properties is found to be mainly associated with the micro-cracks generated inside the rock in response to cyclic wetting-drying weathering. The data in this study provide useful guidance for long-term stability evaluation of engineering structures constructed under cyclic wetting-drying weathering condition.