Experimental study on mechanical properties of grottoes sandstone influenced by temperature

被引：0
|
作者：
Zhu P. [1 ]
Wang C. [1 ,2 ,3 ]
Jiang S. [2 ]
Zhang W. [1 ]
Chen H. [2 ]
机构：
[1] College of Civil Engineering, Chongqing University, Chongqing
[2] Academy of Dazu Rock Carvings, Chongqing
[3] Chongqing Bureau of Geology and Minerals Exploration, Chongqing
来源：
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2024年 / 43卷
基金：
中国国家自然科学基金;
关键词：
Brazilian splitting; grotto sandstone; mechanical properties; rock mechanics; temperature effect; uniaxial compression;
D O I：
10.13722/j.cnki.jrme.2023.0001
中图分类号：
学科分类号：
摘要：
Grotto temples are located in environments that are subject to long-term alternating effects of cooling and heating, and temperature variations commonly lead to changes in the mechanical properties of the grotto surrounding rock. The sandstone of the Dazu Grottoes in Chongqing was taken as the research object in this paper. The mechanical properties of grotto sandstone were investigated by uniaxial compression test and Brazil split test, and the stress-strain curve, strength, peak stress and strain, elastic modulus, and failure mode of grotto sandstone under different temperature and heating-cooling conditions were analyzed. The results show that the uniaxial compressive strength of sandstone decreased after 10 heating-cooling cycles. Compared to natural cooling, water cooling significantly reduced the uniaxial compressive strength of sandstone. The tensile strength of the sandstone was strongly influenced by the cooling method, with the lowest tensile strength under the low-temperature water cooling cycle. The peak strain of sandstone decreased after 10 heating-cooling cycles. Compared to natural cooling, water cooling cycles decreased the elastic modulus of sandstone, and it also decreased as the number of cycles increased from 5 to 10. The failure mode of sandstone under uniaxial compression was mainly shear failure, which became complex after heating-cooling cycles. The main difference of the failure modes of sandstone under Brazilian splitting was the shape and number of cracks. After water cooling cycles, the main crack of sandstone changed from linear to arc or formed secondary cracks. © 2024 Academia Sinica. All rights reserved.
引用
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页码：3310 / 3320
页数：10
相关论文
共 26 条
  • [1] LI Chun, Study of the evolution of granite’s physical and mechanical properties under heating and cooling alternating, (2020)
  • [2] YANG Xiguang, Study on Weathering mechanism of Beijing marble, (2016)
  • [3] DING Wuxiu, XU Tao, WANG Hongyi, Et al., Experimental study of mechanical property of limestone under coupled chemical solution and freezing-thawing process[J], Chinese Journal of Rock Mechanics and Engineering, 34, 5, pp. 979-985, (2015)
  • [4] HONG T, THOMAS K, NENG X X, Et al., Physical properties of sandstones after high temperature treatment[J], Rock Mechanics and Rock Engineering, 45, 45, pp. 1113-1117, (2012)
  • [5] BIAO K, WANG E Y, LI Z H, Et al., Fracture mechanical behavior of sandstone subjected to high-temperature treatment and its acoustic emission characteristics under uniaxial compression conditions[J], Rock Mechanics and Rock Engineering, 49, 12, pp. 4911-4918, (2016)
  • [6] RATHNAWEERA T D, RANJITH P G, GU X, Et al., Experimental investigation of thermomechanical behaviour of clay-rich sandstone at extreme temperatures followed by cooling treatments[J], International Journal of Rock Mechanics and Mining Sciences, 107, 14, pp. 208-223, (2018)
  • [7] XU Guangmiao, LIU Quansheng, PENG Wanwei, Et al., Experimental study on basic mechanical behaviors of rocks under low temperatures, Chinese Journal of Rock Mechanics and Engineering, 25, 12, pp. 2502-2508, (2006)
  • [8] YUAN Yiqi, LAN Hengxing, LIU Shijie, Et al., Spatial-temporal features of thermal induced crack damage in sandstone grottoes, Chinese Journal of Rock Mechanics and Engineering, 41, 12, pp. 2530-2542, (2022)
  • [9] LONG Lijie, Study on mechanical and seepage properties of sandstone under the coupling of temperature-seepage-stress, (2021)
  • [10] HE Yulong, YANG Lizhong, Testing study concerning the effect of temperature and effective stress on permeability of sandstone[J], Coal Geology and Exploration, 2, pp. 36-38, (2004)
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