Experimental investigation of creep behavior of clastic rock in Xiangjiaba Hydropower Project
There are many fracture zones crossing the dam foundation of the Xiangjiaba Hydropower Project in southwestern China. Clastic rock is the main media of the fracture zone and has poor physical and mechanical properties. In order to investigate the creep behavior of clastic rock, triaxial creep tests...
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Format: | Article |
Language: | English |
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Elsevier
2015-01-01
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Series: | Water Science and Engineering |
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Online Access: | http://www.sciencedirect.com/science/article/pii/S167423701500006X |
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author | Yu Zhang Wei-ya Xu Jian-fu Shao Hai-bin Zhao Wei Wang |
author_facet | Yu Zhang Wei-ya Xu Jian-fu Shao Hai-bin Zhao Wei Wang |
author_sort | Yu Zhang |
collection | DOAJ |
description | There are many fracture zones crossing the dam foundation of the Xiangjiaba Hydropower Project in southwestern China. Clastic rock is the main media of the fracture zone and has poor physical and mechanical properties. In order to investigate the creep behavior of clastic rock, triaxial creep tests were conducted using a rock servo-controlling rheological testing machine. The results show that the creep behavior of clastic rock is significant at a high level of deviatoric stress, and less time-dependent deformation occurs at high confining pressure. Based on the creep test results, the relationship between axial strain and time under different confining pressures was investigated, and the relationship between axial strain rate and deviatoric stress was also discussed. The strain rate increases rapidly, and the rock sample fails eventually under high deviatoric stress. Moreover, the creep failure mechanism under different confining pressures was analyzed. The main failure mechanism of clastic rock is plastic shear, accompanied by a significant compression and ductile dilatancy. On the other hand, with the determined parameters, the Burgers creep model was used to fit the creep curves. The results indicate that the Burgers model can exactly describe the creep behavior of clastic rock in the Xiangjiaba Hydropower Project. |
first_indexed | 2024-04-12T10:39:01Z |
format | Article |
id | doaj.art-3483b7b2efee4eab94cca28dd98bcb9e |
institution | Directory Open Access Journal |
issn | 1674-2370 |
language | English |
last_indexed | 2024-04-12T10:39:01Z |
publishDate | 2015-01-01 |
publisher | Elsevier |
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series | Water Science and Engineering |
spelling | doaj.art-3483b7b2efee4eab94cca28dd98bcb9e2022-12-22T03:36:39ZengElsevierWater Science and Engineering1674-23702015-01-0181556210.1016/j.wse.2015.01.005Experimental investigation of creep behavior of clastic rock in Xiangjiaba Hydropower ProjectYu Zhang0Wei-ya Xu1Jian-fu Shao2Hai-bin Zhao3Wei Wang4College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao 266555, PR ChinaGeotechnical Research Institute, Hohai University, Nanjing 210098, PR ChinaGeotechnical Research Institute, Hohai University, Nanjing 210098, PR ChinaHunan Provincial Key Laboratory of Key Technology on Hydropower Development, Changsha 410014, PR ChinaGeotechnical Research Institute, Hohai University, Nanjing 210098, PR ChinaThere are many fracture zones crossing the dam foundation of the Xiangjiaba Hydropower Project in southwestern China. Clastic rock is the main media of the fracture zone and has poor physical and mechanical properties. In order to investigate the creep behavior of clastic rock, triaxial creep tests were conducted using a rock servo-controlling rheological testing machine. The results show that the creep behavior of clastic rock is significant at a high level of deviatoric stress, and less time-dependent deformation occurs at high confining pressure. Based on the creep test results, the relationship between axial strain and time under different confining pressures was investigated, and the relationship between axial strain rate and deviatoric stress was also discussed. The strain rate increases rapidly, and the rock sample fails eventually under high deviatoric stress. Moreover, the creep failure mechanism under different confining pressures was analyzed. The main failure mechanism of clastic rock is plastic shear, accompanied by a significant compression and ductile dilatancy. On the other hand, with the determined parameters, the Burgers creep model was used to fit the creep curves. The results indicate that the Burgers model can exactly describe the creep behavior of clastic rock in the Xiangjiaba Hydropower Project.http://www.sciencedirect.com/science/article/pii/S167423701500006XRock mechanicsClastic rockCreep behaviorTriaxial creep testBurgers creep modelXiangjiaba Hydropower Project |
spellingShingle | Yu Zhang Wei-ya Xu Jian-fu Shao Hai-bin Zhao Wei Wang Experimental investigation of creep behavior of clastic rock in Xiangjiaba Hydropower Project Water Science and Engineering Rock mechanics Clastic rock Creep behavior Triaxial creep test Burgers creep model Xiangjiaba Hydropower Project |
title | Experimental investigation of creep behavior of clastic rock in Xiangjiaba Hydropower Project |
title_full | Experimental investigation of creep behavior of clastic rock in Xiangjiaba Hydropower Project |
title_fullStr | Experimental investigation of creep behavior of clastic rock in Xiangjiaba Hydropower Project |
title_full_unstemmed | Experimental investigation of creep behavior of clastic rock in Xiangjiaba Hydropower Project |
title_short | Experimental investigation of creep behavior of clastic rock in Xiangjiaba Hydropower Project |
title_sort | experimental investigation of creep behavior of clastic rock in xiangjiaba hydropower project |
topic | Rock mechanics Clastic rock Creep behavior Triaxial creep test Burgers creep model Xiangjiaba Hydropower Project |
url | http://www.sciencedirect.com/science/article/pii/S167423701500006X |
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