Experimental Study on Shear Characteristics of Filled Joints Anchored by Basalt Fiber-Reinforced Polymer Materials
Hengjie Luan, Qingzhai Shi, Changsheng Wang, Yujing Jiang, Sunhao Zhang, Jianrong Liu, Kun Liu
TL;DR
This study examines how basalt fiber-reinforced polymer bolts affect the shear strength of filled rock joints under different conditions.
Contribution
The novel contribution is the experimental investigation of BFRP bolts' performance in controlling shear slip in filled joints with varying roughness and filling degrees.
Findings
Peak shear strength decreases by 23.9% as filling degree increases from 0 to 2.0.
BFRP bolts control deformation within 15.5~22.3 mm vertically and 4.7~6.9 mm horizontally during shear.
Acoustic emission events are concentrated in the post-peak plastic stage and increase with higher filling degrees.
Abstract
Filled joints are widely found in natural rock masses and are one of the main factors causing rock mass engineering instability. The use of bolts can effectively control the shear slip of filled joints, research on bolts filled joints in the filling degree, and other key parameters of the influence of the law, to ensure the stability of the engineering rock body is of great significance. This paper presents shear experiments on bolted filled joints of Basalt Fiber-Reinforced Polymer (BFRP) materials with different joint roughness and filling degrees, while acoustic emission technology monitors the shear failure process of the specimens. The results show that the peak shear strength decreases with the increase in filling degree, and the peak shear strength decreases by 23.9% when the filling degree changes from 0 to 2.0 at 4 MPa and J2 conditions, while the normal stress, the Joint…
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Taxonomy
TopicsRock Mechanics and Modeling · Tunneling and Rock Mechanics · Drilling and Well Engineering