Experimental study on the shear performance of a prestressed anchored jointed rock-like mass under different corrosion levels

被引：7
作者：
Ding, Wantao [1 ,2 ]
Huang, Xinghang [2 ]
Wang, Zhongrong [2 ]
Chen, Lei [2 ]
机构：
[1] Shandong Univ, Geotech & Struct Engn Res Ctr, Jinan 250061, Peoples R China
[2] Shandong Univ, Sch Qilu Transportat, Jinan 250002, Shandong, Peoples R China
来源：
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES | 2022年 / 158卷
基金：
中国国家自然科学基金;
关键词：
Accelerated corrosion; Anchored jointed rock -like mass; Prestress; Shear performance; Deterioration; ANALYTICAL-MODEL; MECHANICAL-BEHAVIOR; BOLT; CONCRETE; DESIGN; SYSTEM; STEEL;
D O I：
10.1016/j.ijrmms.2022.105209
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
To illustrate the influence of corrosion on the shear performance of jointed rock masses reinforced by prestress anchors, four kinds of concrete specimens reinforced by anchors with different joint distributions were designed, and prestress was applied to the anchors using the posttensioning method. The deterioration effect of the shear performance of jointed rock-like masses reinforced by prestress anchors (JRLM-PA) under different corrosion levels was studied by means of electrochemical accelerated corrosion tests and direct shear tests. The research shows that (1) prestress improves the cohesion of the joint surface of jointed rock-like masses reinforced by anchors (JRLM-A) but has almost no influence on the internal friction angle of the joint surface of JRLM-A, (2) the shear strength of JRLM-PA increases first and then decreases with increasing pitting rates, and (3) the greater the prestress, the higher the connectivity rate, and the more significant the deteriorated influence of equivalent corrosion on the shear strength of JRLM-PA. Finally, an equation to calculate the shear strength of JRLM-PA under different corrosion levels is proposed, and the rationality of the equation is verified by comparison with the results of the laboratory tests.
引用
收藏
页数：15
相关论文
共 34 条
[1]  
AYDAN O, 1992, ROCK SUPPORT IN MINING AND UNDERGROUND CONSTRUCTION, P483
[2]   Design and Evaluation of the Roof Bolt Corrosion Test System in a Simulated Underground Coal Mine Environment [J].
Bylapudi, Gopi ;
Spearing, A. J. S. ;
Mondal, Kanchan ;
Bhagwat, Anand .
MINING METALLURGY & EXPLORATION, 2020, 37 (02) :593-604
[3]   Stress corrosion testing of roof bolt grade 60 steel in simulated underground coal mine atmosphere [J].
Bylapudi, Gopi ;
Spearing, A. J. S. ;
Mondal, Kanchan ;
Bhagwat, Anand .
MINING TECHNOLOGY-TRANSACTIONS OF THE INSTITUTIONS OF MINING AND METALLURGY, 2019, 128 (04) :206-215
[4]   A rock bolt and rock mass interaction model [J].
Cai, Y ;
Esaki, T ;
Jiang, YJ .
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 2004, 41 (07) :1055-1067
[5]   An analytical model to predict axial load in grouted rock bolt for soft rock tunnelling [J].
Cai, Y ;
Esaki, T ;
Jiang, YJ .
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY, 2004, 19 (06) :607-618
[6]   Experimental and numerical investigation of crack propagation in bolting systems strengthened with resin-encapsulated rock bolts [J].
Chong, Zhaohui ;
Yue, Tenglong ;
Yao, Qiangling ;
Li, Xuehua ;
Zheng, Chuangkai ;
Xia, Ze ;
Li, Huaizhen .
ENGINEERING FAILURE ANALYSIS, 2021, 122
[7]   Investigations into the corrosive environments contributing to premature failure of Australian coal mine rock bolts [J].
Craig, P. ;
Serkan, S. ;
Hagan, P. ;
Hebblewhite, B. ;
Vandermaat, D. ;
Crosky, A. ;
Elias, E. .
INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY, 2016, 26 (01) :59-64
[8]  
Ding Wan-tao, 2013, Journal of South China University of Technology (Natural Science Edition), V41, P100, DOI 10.3969/j.issn.1000-565X.2013.06.016
[9]   Experimental Study on Corrosion of Anchored Rock Mass for Half-Through Intermittent Joints [J].
Ding, Wantao ;
Li, Mingjiang ;
Wang, Mingbin ;
Chen, Rui ;
Wang, Yang ;
Chen, Lei .
ADVANCES IN CIVIL ENGINEERING, 2019, 2019
[10]   Failure assessment of reinforced rock slopes subjected to bolt corrosion considering correlated multiple failure modes [J].
Fu, Guoyang ;
Deo, Ravin ;
Ji, Jian ;
Kodikara, Jayantha .
COMPUTERS AND GEOTECHNICS, 2021, 132
1234