›› 2015, Vol. 36 ›› Issue (1): 143-148.doi: 10.16285/j.rsm.2015.01.020

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Analysis of axial and transverse effects of rock bolt during shearing process

CHEN Wen-qiang1, 2，JIA Zhi-xin2，ZHAO Yu-fei2，LIU Li-peng2，ZHOU Ji-jun3，LIN Xing-chao2   

  1. 1. Department of Management, Tianjin University of Technology, Tianjin 300384, China; 2. Department of Geotechnical Engineering, China Institution of Water Resources and Hydropower Research, Beijing 100048, China; 3. CNR Construction Engineering Co., Ltd., Beijing 100078, China
  • Received:2013-08-21 Online:2015-01-12 Published:2018-06-13

PDF (Chinese)

1707

Abstract: This paper analyzes the shear strength of the bolted rock joint contributed by the axial force and transverse shear force. The formula of the shear strength of a bolted joint with dilatancy is derived using the variational principle of minimum potential energy. The theoretical solutions are verified with the direct shear test of bolted structure. Then the shear strength of the bolted structure is contributed by the axial force and transverse shear force. It is analyzed with different rock mass strengths, bolt diameters, normal stresses and pre-stresses, using this theoretical method. All the relevant analyses show that the computed results agree well with the results of experiment. The shear strength of the jointed structure contributed by the transverse shear force is remarkable. When the bolt inclination increases gradually, the joint shear resistances contributed by the transverse shear force and the axial force increases and decreases respectively. When the bolt inclination is 120°－150°, the joint shear resistance contributed by the axial force is almost zero. The joint shear resistance contributed by the axial force decreases as the rock mass strength and normal stress increase. It increases obviously as the bolt diameter and pre-stress increase. The joint shear strength contributed by the transverse shear force increases as the rock mass strength and bolt diameter increase, but decreases slightly as the pre-stress increases.

Key words: jointed rock mass, rock bolt, transverse shear force, axial force, shear strength

CLC Number: 

  • TU 470
[1] TU Yuan, WANG Kui-hua, ZHOU Jian, HU An-feng, . Application of effective stress method and effective consolidation stress method for strength calculation in preloading ground [J]. Rock and Soil Mechanics, 2020, 41(2): 645-654.
[2] FAN Ke-wei, LIU Si-hong, LIAO Jie, FANG Bin-xin, WANG Jian-lei, . Experimental study on shearing characteristics of pebbles-filled soilbags [J]. Rock and Soil Mechanics, 2020, 41(2): 477-484.
[3] WANG Pei-tao, HUANG Zheng-jun, REN Fen-hua, ZHANG Liang, CAI Mei-feng, . Research on direct shear behaviour and fracture patterns of 3D-printed complex jointed rock models [J]. Rock and Soil Mechanics, 2020, 41(1): 46-56.
[4] LI Xiao-gang, ZHU Chang-qi, CUI Xiang, ZHANG Po-yu, WANG Rui, . Experimental study of triaxial shear characteristics of carbonate mixed sand [J]. Rock and Soil Mechanics, 2020, 41(1): 123-131.
[5] ZHANG Chen-yang, CHEN Min, HU Ming-jian, WANG Xin-zhi, TANG Jian-jian, . Effect of fine particles content on shear strength of calcareous sand [J]. Rock and Soil Mechanics, 2019, 40(S1): 195-202.
[6] WANG Huan, CHEN Qun, WANG Hong-xin, ZHANG Wen-ju, . Triaxial tests on fly ash with different compaction and matric suction [J]. Rock and Soil Mechanics, 2019, 40(S1): 224-230.
[7] LI Xin-ming, KONG Ling-wei, GUO Ai-guo, . Experimental study of ageing effect on mechanical properties of Nanyang undisturbed expansive soil [J]. Rock and Soil Mechanics, 2019, 40(8): 2947-2955.
[8] LI Shu-zhao, WANG Zhong-chang, JIA Xu, HE Lin-lin, . Simplified calculation method for cyclic bearing capacity of suction anchors with taut mooring in soft clay [J]. Rock and Soil Mechanics, 2019, 40(5): 1704-1712.
[9] ZHOU Xiao-wen, CHENG Li, ZHOU Mi, WANG Qi, . Behavior of ball penetration in clay in centrifuge testing [J]. Rock and Soil Mechanics, 2019, 40(5): 1713-1720.
[10] ZHENG Guo-feng, GUO Xiao-xia, SHAO Long-tan, . Experimental verification of an unsaturated shear strength criterion based on the state surface expression [J]. Rock and Soil Mechanics, 2019, 40(4): 1441-1448.
[11] FU Hong-yuan, LIU Jie, ZENG Ling, BIAN Han-bing, SHI Zhen-ning, . Deformation and strength tests of pre-disintegrating carbonaceous mudstone under loading and soaking condition [J]. Rock and Soil Mechanics, 2019, 40(4): 1273-1280.
[12] ZHANG Jing-ke, SHAN Ting-ting, WANG Yu-chao, WANG Nan, FAN Meng, ZHAO Lin-yi, . Mechanical properties of soil-grout interface of anchor system in earthen sites [J]. Rock and Soil Mechanics, 2019, 40(3): 903-912.
[13] WU Qiu-hong, ZHAO Fu-jun, WANG Shi-ming, ZHOU Zhi-hua, WANG Bin, LI Yu, . Mechanical response characteristics of full grouted rock bolts subjected to dynamic loading [J]. Rock and Soil Mechanics, 2019, 40(3): 942-950.
[14] JIANG Qiang-qiang, LIU Lu-lu, JIAO Yu-yong, WANG Hao, . Strength properties and microstructure characteristics of slip zone soil subjected to wetting-drying cycles [J]. Rock and Soil Mechanics, 2019, 40(3): 1005-1012.
[15] QIU Min, YUAN Qing, LI Chang-jun, XIAO Chao-chao, . Comparative study of calculation methods for undrained shear strength of clay based on cavity expansion theory [J]. Rock and Soil Mechanics, 2019, 40(3): 1059-1066.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
[1] WEI Li，CHAI Shou-xi，CAI Hong-zhou，WANG Xiao-yan，LI Min3，SHI Qian. Research on tensility of wheat straw for reinforced material[J]. , 2010, 31(1): 128 -132 .
[2] HUANG Qing-xiang, ZHANG Pei, DONG Ai-ju. Mathematical model of “arch beam” of thick sandy soil layer movement in shallow seam[J]. , 2009, 30(9): 2722 -2726 .
[3] SUN De-an，CHEN Bo. Mechanical behavior of remolded overconsolidated Shanghai soft clay and its elastoplastic simulation[J]. , 2010, 31(6): 1739 -1743 .
[4] WANG Yang, TANG Xiong-jun, TAN Xian-kun, WANG Yuan-han. Mechanism analysis of floor heave in Yunling Tunnel[J]. , 2010, 31(8): 2530 -2534 .
[5] LIU Zheng-hong，LIAO Yan-hong，ZHANG Yu-shou. Preliminary study of physico-mechanical properties of Luanda sand[J]. , 2010, 31(S1): 121 -126 .
[6] LEI Jin-bo，CHEN Cong-xin. Research on load transfer mechanism of composite foundation of rigid pile with cap based on hyperbolic model[J]. , 2010, 31(11): 3385 -3391 .
[7] WANG Deng-ke，LIU Jian，YIN Guang-zhi，WEI Li-de. Research on influencing factors of permeability change for outburst-prone coal[J]. , 2010, 31(11): 3469 -3474 .
[8] HU Qi, LING Dao-sheng, CHEN Yun-min. Analytical method and engineering application of horizontal coefficients of subgrade reaction based on Melan’s solution[J]. , 2009, 30(1): 33 -39 .
[9] ZHANG Cheng-ping，ZHANG Ding-li，LUO Jian-jun，WANG Meng-shu，WU Jie-pu. Remote monitoring system applied to the construction of metro station undercrossing existing metro tunnel[J]. , 2009, 30(6): 1861 -1866 .
[10] WANG Jun, CAO Ping, LI Jiang-teng, LIU Ye-ke. Analysis of stability of tunnel-slope with rheological medium under rainfall infiltration[J]. , 2009, 30(7): 2158 -2162 .
Copyright © Rock and Soil Mechanics, All Rights Reserved.
Tel: 027-87198484, 87199252, 87199253, 87198752　E-mail: ytlx@whrsm.ac.cn
Powered by Beijing Magtech Co. Ltd