顺层岩质边坡锚杆拉剪作用力学性能

张爱社; 祝介旺; 高翠兰; 李文乐; 侯海波; 曹照法

doi:10.3799/dqkx.2022.378

Volume 47 Issue 12

Dec. 2022

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Article Navigation > Earth Science > 2022 > 47(12): 4574-4582

Zhang Aishe, Zhu Jiewang, Gao Cuilan, Li Wenle, Hou Haibo, Cao Zhaofa, 2022. Mechanical Analysis of Rock Bolts under Action of Tension and Shearing in Bedding Rock Slopes. Earth Science, 47(12): 4574-4582. doi: 10.3799/dqkx.2022.378

Citation:

Zhang Aishe, Zhu Jiewang, Gao Cuilan, Li Wenle, Hou Haibo, Cao Zhaofa, 2022. Mechanical Analysis of Rock Bolts under Action of Tension and Shearing in Bedding Rock Slopes. Earth Science, 47(12): 4574-4582. doi: 10.3799/dqkx.2022.378

Citation:

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Mechanical Analysis of Rock Bolts under Action of Tension and Shearing in Bedding Rock Slopes

doi: 10.3799/dqkx.2022.378

1.
School of Civil Engineering, Shandong Jianzhu University, Jinan 250101, China
2.
School of Transportation Engineering, Shandong Jianzhu University, Jinan 250101, China

Received Date: 2022-06-25
Available Online: 2023-01-10
Publish Date: 2022-12-25

Abstract

Abstract

Bolting is one of the important methods to harness the bedding rock slopes. The stability of the rock can be strengthened by rock bolts. The mechanical model of bolted bedding rock slope is employed to analyses the behavior of the rock bolt. The force method approach and the deformation compatibility principles are used to model the contribution of the axial and shear bolt forces at the intersection between the bolt and the joint plane. The theoretical analyses of the shearing resistance for the fully grouted rock bolts in the bedding rock slope are evaluated in the action of axial and shear loads. Comparisons and validations were carried out between the shearing resistance mechanical model predictions and the experimental data. It is shown that the data of the both methods have a good agreement. The effects of bolt inclination, the length of shearing deformation, bolt diameter, the grout compressive strength, and the internal friction angle of the joint plane on the shear strength of the bolted bedding rocks are investigated in detail. The results show that the bolt shearing resistance model expresses the contribution of the axial force and shearing force of the bolts to the shear strength of the bedding rock slopes. The total resistance is reduced with the larger of the bolt inclination. With increasing of the dilation angle, the rock bolt resisting force increases. When the inclination of rock bolt equals to the friction angle, the bolt contribution to resist the rock movement is the maximum value.The greater the diameter of the bolts, the larger the bolt resistance. The resistance of the rock bolt will have a little reduction with the increasing of the grout compressive strength for a certain diameter of the bolt.
- bedding rock slope,
- fully grouted bolt,
- bolt anchoring,
- action of axial and shear load,
- shearing capacity,
- geotechnical engineering

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References(37)

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