Strength and failure characteristics of rock-like material containing single crack under freeze-thaw and uniaxial compression

被引：99
作者：
Huang, Shibing [1 ,2 ]
Liu, Yanzhang [1 ,2 ]
Guo, Yunlin [1 ]
Zhang, Zelin [1 ,2 ]
Cai, Yuantian [1 ]
机构：
[1] Wuhan Univ Sci & Technol, Sch Resources & Environm Engn, Wuhan, Hubei, Peoples R China
[2] Hubei Key Lab Efficient Utilizat & Agglomerat Met, Wuhan, Hubei, Peoples R China
来源：
COLD REGIONS SCIENCE AND TECHNOLOGY | 2019年 / 162卷
基金：
中国国家自然科学基金;
关键词：
Fractured rock mass; Freeze-thaw; Frost propagation; Uniaxial compressive strength; Rupture mode; MECHANICAL-PROPERTIES; MODEL; INITIATION; BEHAVIOR; DAMAGE; FLAW; DEGRADATION; TEMPERATURE; PROPAGATION; PARAMETERS;
D O I：
10.1016/j.coldregions.2019.03.013
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The frost heaving pressure in cracks, caused by 9% volumetric expansion of freezing water, may deteriorate fractured rock. Several freeze-thaw cycles and uniaxial compressive experiments were conducted on crack-containing specimens to study the frost propagation of open cracks and uniaxial compressive strength (UCS) of these frost-cracking specimens. The experimental results show that new frost-heaving cracks initiate at the crack tip and grow along the coplanar direction firstly, then most of them turn to the short side of specimens because of boundary effect. The frost cracking of saturated rock is greatly affected by the freezing direction. If the preexisted crack is saturated before freezing, new frost-heaving cracks will appear after only 1-4 freeze-thaw cycles. However, no frost-heaving crack occurs after 20 freeze-thaw cycles if water is injected into the precooling crack after freezing, because > 8% crack ice is squeezed out of crack. Morever, the UCS of crack-containing rock-like specimens will be reduced by these new frost-heaving cracks when the inclination angle of pre-existed crack is close to the rupture angle, and the UCS increases with increasing inclination angle or decreasing crack length.
引用
收藏
页码：1 / 10
页数：10
相关论文
共 43 条
[1]   Critical degree of saturation: A control factor of freeze-thaw damage of porous limestones at Castle of Chambord, France [J].
Al-Omari, Asaad ;
Beck, Kevin ;
Brunetaud, Xavier ;
Torok, Akos ;
Al-Mukhtar, Muzahim .
ENGINEERING GEOLOGY, 2015, 185 :71-80
[2]   The initiation of secondary cracks in compression [J].
Bobet, A .
ENGINEERING FRACTURE MECHANICS, 2000, 66 (02) :187-219
[3]   Stress generated by the freeze-thaw process in open cracks of rock walls: empirical model for tight limestone [J].
Bost, Marion ;
Pouya, Ahmad .
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT, 2017, 76 (04) :1491-1505
[4]   Mechanical Behavior of Brittle Rock-Like Specimens with Pre-existing Fissures Under Uniaxial Loading: Experimental Studies and Particle Mechanics Approach [J].
Cao, Ri-hong ;
Cao, Ping ;
Lin, Hang ;
Pu, Cheng-zhi ;
Ou, Ke .
ROCK MECHANICS AND ROCK ENGINEERING, 2016, 49 (03) :763-783
[5]   The Effects of Crack Openings on Crack Initiation, Propagation and Coalescence Behavior in Rock-Like Materials Under Uniaxial Compression [J].
Cheng, Hao ;
Zhou, Xiaoping ;
Zhu, Jiang ;
Qian, Qihu .
ROCK MECHANICS AND ROCK ENGINEERING, 2016, 49 (09) :3481-3494
[6]   Thermo-cryogenic controls of fracture kinematics in permafrost rockwalls [J].
Draebing, D. ;
Krautblatter, M. ;
Hoffmann, T. .
GEOPHYSICAL RESEARCH LETTERS, 2017, 44 (08) :3535-3544
[7]   A permafrost test on intact gneiss rock [J].
Duca, S. ;
Alonso, E. E. ;
Scavia, C. .
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 2015, 77 :142-151
[8]   Freeze-thaw fracturing in building granites [J].
Freire-Lista, D. M. ;
Fort, R. ;
Varas-Muriel, M. J. .
COLD REGIONS SCIENCE AND TECHNOLOGY, 2015, 113 :40-51
[9]   A statistical model for predicting the triaxial compressive strength of transversely isotropic rocks subjected to freeze-thaw cycling [J].
Fu, Helin ;
Zhang, Jiabing ;
Huang, Zhen ;
Shi, Yue ;
Chen, Wei .
COLD REGIONS SCIENCE AND TECHNOLOGY, 2018, 145 :237-248
[10]   Experimental Studies on the Effects of Cyclic Freezing-Thawing, Salt Crystallization, and Thermal Shock on the Physical and Mechanical Characteristics of Selected Sandstones [J].
Ghobadi, M. H. ;
Babazadeh, R. .
ROCK MECHANICS AND ROCK ENGINEERING, 2015, 48 (03) :1001-1016
12345