Layout and length optimization of anchor cables for reinforcing rock wedges

Abstract

This paper presents an optimization study on the layout and length of anchor cables for stabilizing rock wedges from the perspective of their three-dimensional geological characteristics. On the basis of the generalized geometry model for rock wedges, the expression of driving force of slope at the arbitrary longitudinal section can be deduced by employing the hyperbolic model between driving force and scale factor of rock wedges. Due to the remarkable parabolic characteristics of the driving force expression of rock wedges, a corresponding non-uniform layout principle of anchor cables was proposed, with closer layout in the central part and sparse layout near the side boundaries. The rational length of anchor cables was quantified on the basis of specification and the three-dimensional spatial characteristics of rock wedges. Furthermore, the upper limit spacing of anchor cables was determined by the spacing threshold caused by the parabolic distributed driving force. The spacing distribution of the optimized anchor cables was verified as a parabolic distribution according to a case study on the Shuige rock wedge in Lishui City, China. Compared with the conventional uniform spacing and length design scheme, the adjusted optimal non-uniform scheme can reduce the anchor cables by 16.9 % and 18.9 % in number and in total length, respectively.

Mechanical Properties and Anchorage Angle Optimization of Rock Mass with a Weak Intercalated Layer

“…The shear mechanical characteristics (Wang and Fang, 2010;Liu et al, 2017;Lin et al, 2017) and the instability damage evolution process (Undul et al, 2015;He and Zhuang, 2019) of anchorage rock mass were analyzed by laboratory test and PFC numerical simulation. The inclination (Wang et al, 2018) and length (Li et al, 2016) of the bolt were studied, and the uniaxial compression characteristics of the coal-rock-anchored composite rock and the mechanical mechanism of the bolt were obtained (Yu et al, 2020).…”

Field Test and Numerical Study of Three Types of Frame Beams Subjected to a 600 kN Anchoring Force

“…There have been many studies about anchor frame beams with the anchor cable as the research object [5][6][7][8]. For example, Li et al [9] advanced a methodology for determining the layout and length of anchor cables based on three-dimensional geological characteristics. Zhang et al [10] examined the influence of anchoring orientation and position on reinforcement effectiveness using the global method.…”

Pre-stressed anchor cable force evolution laws of plane sliding bedding slopes

“…Meanwhile, the most suitable anchor inclination angle would be effective to improve the rock slope stability [16]. Furthermore, to adjust the pre-stresses of the different length anchor cables could reduce the rock slope deformations and displacements [17][18][19][20].…”