›› 2017, Vol. 38 ›› Issue (8): 2279-2285.doi: 10.16285/j.rsm.2017.08.016

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Experimental study on shear behavior of jointed rock mass with anchorage mode

TENG Jun-yang1, 2, ZHANG Yu-ning1, 2, TANG Jian-xin1, 2, ZHANG Chuang1, 2, LI Chen-lin1, 2   

  1. 1. State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China; 2. College of Resources and Environmental Sciences, Chongqing University, Chongqing 400044, China
  • Received:2016-10-08 Online:2017-08-11 Published:2018-06-05
  • Supported by:

    This work was supported by Scientific Research Foundation of State Key Lab. of Coal Mine Disaster Dynamics and Control (2011DA105287-ZD201504).

Abstract: In this study, precast concrete blocks, #45 steel screw, mine chemical grout were used to simulate the surrounding rock and bolt. Shear tests of bolted jointed rock specimens were carried out to study characteristics of jointed shear stress and the cable deformation under three conditions of no-anchored, end-anchored and full-anchored specimens. The results show that obvious differences were found in curves of shear-jointed rock displacement with various anchoring ways. The no-anchor specimen was characterized as brittle. For the end-anchored specimen, a turning point was found in the slightly decreased shear when adjusting the shear strength of anchor. Compared with the above two specimens, the best matching was achieved by the full-anchored specimen with the joint, which indicates that the bolted specimen could bear the greatest shear force. For both the end-anchored bolt and the full-anchor bolt, their deformation characteristics can be divided into the tensile zone, shear-tension zone and compression zone. Under the combined action of shear and tension, the failure of the anchored bolt occurred in the shear-tension zone. With different anchorage modes, the distribution of axial force varied as well during the shear test. The axial force of full-anchored bolt was mainly distributed in the vicinity of the joint. Moreover, it decreased rapidly with the increase of the joint distance. While the distribution of axial force was relatively uniform in the end-anchored bolt.

Key words: tunnel engineering, anchorage mode, shear test, jointed rock mass, failure mode

CLC Number: 

  • TU 457

[1] LI Chao, LI Tao, JING Guo-ye, XIAO Yu-hua, . Study on the ultimate bearing capacity of surrounding soil underlying gripper of shaft boring machine [J]. Rock and Soil Mechanics, 2020, 41(S1): 227-236.
[2] HUANG Wei, XIAO Wei-min, TIAN Meng-ting, ZHANG Lin-hao, . Model test research on the mechanical properties of irregular columnar jointed rock masses [J]. Rock and Soil Mechanics, 2020, 41(7): 2349-2359.
[3] LIU Hai-feng, ZHU Chang-qi, WANG Ren, WANG Xin-zhi, CUI Xiang, WANG Tian-min, . Shear test on reef limestone-concrete bonding interface [J]. Rock and Soil Mechanics, 2020, 41(5): 1540-1548.
[4] ZHAO Ming-hua, PENG Wen-zhe, YANG Chao-wei, XIAO Yao, LIU Ya-nan. Upper bound analysis of lateral bearing capacity of rigid piles in sloping ground [J]. Rock and Soil Mechanics, 2020, 41(3): 727-735.
[5] MENG Qing-bin, QIAN Wei, HAN Li-jun, YU Li-yuan, WANG Cong-kai, ZHOU Xing. Experimental study on formation mechanism and mechanical properties of regenerated structure of very weak cemented rock mass [J]. Rock and Soil Mechanics, 2020, 41(3): 799-812.
[6] JIANG Nan, HUANG Lin, FENG Jun, ZHANG Sheng-liang, WANG Duo, . Research on design and calculation method of tunnel-type anchorage of railway suspension bridge [J]. Rock and Soil Mechanics, 2020, 41(3): 999-1009.
[7] 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.
[8] YAN Chao-ping, LONG Zhi-lin, ZHOU Yi-chun, KUANG Du-min, CHEN Jia-min, . Investigation on the effects of confining pressure and particle size of shear characteristics of calcareous sand [J]. Rock and Soil Mechanics, 2020, 41(2): 581-591.
[9] 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.
[10] HE Peng-fei, MA Wei, MU Yan-hu, HUANG Yong-ting, DONG Jian-hua, . Experimental analysis of interfacial shear behavior of loess-mortar block and construction of constitutive model [J]. Rock and Soil Mechanics, 2019, 40(S1): 82-90.
[11] DAI Guo-liang, ZHU Wen-bo, GUO Jing, GONG Wei-ming, ZHAO Xue-liang, . Experiments on vertical uplift bearing capacity of suction caisson foundation in soft clay [J]. Rock and Soil Mechanics, 2019, 40(S1): 119-126.
[12] XIE Hui-hui, XU Zhen-hao, LIU Qing-bing, HU Gui-yang, . Evolution of peak strength and residual strength of weak expansive soil under drying-wetting cycle paths [J]. Rock and Soil Mechanics, 2019, 40(S1): 245-252.
[13] CHAI Wei, LONG Zhi-lin, KUANG Du-min, CHEN Jia-min, YAN Chao-ping. Effect of shear rate on shear strength and deformation characteristics of calcareous sand in direct shear test [J]. Rock and Soil Mechanics, 2019, 40(S1): 359-366.
[14] WANG Qin-ke, MA Jian-lin, CHEN Wen-long, YANG Yan-xin, HU Zhong-bo, . Centrifugal model tests and calculation method of uplift bearing capacity of rock-socketed pedestal pile overburden soil [J]. Rock and Soil Mechanics, 2019, 40(9): 3405-3415.
[15] CHEN Yong-qing, WEN Chang-ping, FANG Xuan-qiang, . Modified Yin’s double-yield-surface model for bioenzyme-treated expansive soil [J]. Rock and Soil Mechanics, 2019, 40(9): 3515-3523.
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
No Suggested Reading articles found!