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| Experimental Study on Creep Characteristics and Damage Model of Carbonaceous Slate After Freeze-Thaw |
| LIU Guo-min1,2, HUANG Mei1,2, CAO Ming-ming3, CHEN Hua3 |
1. Sichuan Long Highway Tunnel (Group) Operation Safety Engineering Laboratory, Chengdu, Sichuan 611130, China;
2. Sichuan Vocational and Technical College of Communications, Chengdu, Sichuan 611130, China;
3. Sichuan Communication Surveying & Design Institute Co., Ltd., Chengdu, Sichuan 610017, China |
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Abstract Taking the carbonaceous slate of Zhuokeji tunnel on the Wenchuan-Ma,erkang expressway as the research subject, triaxial compression creep tests were conducted under various freeze-thaw cycles to analyze the creep strain characteristics and long-term strength of the carbonaceous slate. Assuming that the aging damage of rock under load follows the Weibull probability density distribution, the loaded damage variable is defined. The freeze-thaw damage variable is defined according to the phenomenological theory of damage mechanics. Considering the coupling effect of freeze-thaw and stress, a total damage variable for freeze-thaw and load is constructed. Based on the creep behavior of carbonaceous slate, the structure of the H-H｜N-N｜S creep model is determined. Based on this, the damage evolution is carried out, and a new creep damage model that can reflect the coupling of freeze-thaw and stress is obtained, which is extended to a three-dimensional stress state. The solution method for model parameters is provided, and the damage evolution law is analyzed. The creep characteristics of carbonaceous slate are identified using the established model. A traditional model is introduced for comparison, and the simulation comparison curve is analyzed to verify the feasibility and rationality of the new model.
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Received: 15 March 2024
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| Fund:This work was funded by Science and Technology Planning Project of Sichuan Province (Grant No.2018GZ0359) |
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[1] WANG Ya-song, MA Lin-jian, LIU Xin-yu, et al. Research Progress on Creep and Fatigue Damage Characteristics of Rock[J]. Industrial Construction, 2016, 46(4):120-127, 168.(in Chinese)
[2] WANG Z, FANG J, XIA C, et al. Determination Method of Supporting Time for Secondary Lining in Tunnel Considering Rock Creep Behaviors[J]. Chinese Journal of Rock Mechanics and Engineering, 2010, 29(S1):3241-3246.
[3] FAHIMIFAR A, KARAMI M, FAHIMIFAR A. Modifications to an Elasto-visco-plastic Constitutive Model for Prediction of Creep Deformation of Rock Samples[J]. Soils and Foundations, 2015, 55(6):1364-1371.
[4] YAN Bing-qian, REN Fen-hua, CAI Mei-feng, et al. Review on the Research of Rock Physical and Mechanical Properties and Constitutive Model Under Multi Field Coupling of THMC[J]. Chinese Journal of Engineering, 2020, 42(11):1389-1399.(in Chinese)
[5] WANG Yan-chun. Study on Creep Law of Deep Soft Rock Under the Coupling Action of Temperature, Stress and Chemistry[D]. Qingdao:Qingdao University of Science And Technology, 2013.(in Chinese)
[6] CUI Qiang, YAO Hua-yan, NIU Zhi-juan. An Experimental Study on Creep Properties of Sandstone Sample Under Stress-chemical-water Flow Coupling Effect[J]. Disaster Advances, 2013, 6:164-169.
[7] CHEN Wei-zhong, LI Fan-fan, LEI Jiang, et al. Study on Creep Characteristics of Clay Rock Under Thermal Water Mechanical Coupling Condition[J]. Rock and Soil Mechanics, 2020, 41(2):379-388.(in Chinese)
[8] ZHANG Ming-zhu, LI Hui-qin, YAN Xiang-zhi. Temperature Confining Pressure Coupled Time-dependent Creep Model of Tunnel Sandstone[J]. Journal of Hydroelectric Engineering, 2021, 40(8):124-131.(in Chinese)
[9] FENG Xue-zhi, QIN Nan, CUI Li-zhuang, et al. Experimental Study on Triaxial Creep and Meso Damage of Sandstone Under Hydrochemical Freeze-thaw Cycle[J]. Chinese Journal of Applied Mechanics, 2021, 38(4):1383-1391.(in Chinese)
[10] SHEN Yan-jun, YANG Geng-she, RONG Teng-long, et al. Discussion on Suggested Scheme of Rock Freeze-thaw Cycle Test[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(10):1775-1782.(in Chinese)
[11] ZHANG Chun-mei, CUI Guang-qin, BAO Xian-kai. Experimental Study on Triaxial Creep Mechanical Properties of Water Bearing Sandstone[J]. Journal of Yangtze River Scientific Research Institute, 2019, 36(11):57-61, 75.(in Chinese)
[12] SUN Jun. Rheology of Geotechnical Materials and Its Engineering Application[M]. Beijing:China Construction Industry Press, 1999.(in Chinese)
[13] LIU Xin-xi, LI Sheng-nan, ZHOU Yan-ming, et al. Study on Creep Characteristics and Long-term Strength of High Stress Argillaceous Siltstone[J]. Chinese Journal of Rock Mechanics and Engineering, 2020, 39(1):138-146.(in Chinese)
[14] HUANG Hai-feng, JU Neng-pan, HAUNG Min, et al. Nonlinear Creep Damage Model of Soft Rock and Its Experimental Study[J]. Hydrogeology&Engineering Geology, 2017, 44(3):49-54, 60.(in Chinese)
[15] TANG Xue-song, ZHEGN Jian-long, JAING Chi-ping. Continuous Damage Theory and Application[M]. Beijing:China Communications Press, 2006.(in Chinese)
[16] SONG Fei, ZHAO Fa-suo, LU Quan-zhong. Study on Rheological Properties and Rheological Model of Gypsum Breccia[J]. Chinese Journal of Rock Mechanics and Engineering, 2004, 24(15):2659-266.(in Chinese).
[17] WANG Geng-feng,ZHANG Yong-xing,XIONG Xiao-hui,et al. Experiment of Creep Characteristics of Carbonaceous Slate of Deep-buried Tunnel[J]. Journal of Highway and Transportation Research and Development, 2012, 29(9):95-102.(in Chinese)
[18] CUI A-neng, HU Bin, CUI Kai, et al. A Model of Rock Viscoelastoplastic Creep Based on Double Stress-time Thresholds[J]. Journal of Highway and Transportation Research and Development, 2022, 39(2):125-132.(in Chinese) |
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2024, Vol. 18 
