Abstract
The nonlinear strength criterion is introduced into the paper firstly, and then the geometric anchoring characteristic model of rock slope separated from two layers according to rock type with the fracture surface of log-spiral curve considering nonlinear twin-shear criterion subjected to seismic loads is established. Finally, some correlated influential parameters are analyzed, and the conclusions are drawn, showing that the intermediate principal stress has great influence on the total anchoring force of bolt P, so when different criteria are selected, the influence of intermediate principal stress should not be omitted. The effects of thickness ratio h1/h2 on total anchoring force increase gradually with the increase of inclination angle ϕ . The total anchoring force P decreases gradually with the increase of inclination angle ϕ and surcharge load q. The total anchoring force increases gradually with the increase of horizontal seismic acceleration coefficients kh and geometric coefficients mi and GSI.
Highlights
Where σc is the uniaxial compressive strength of intact rock, m is constant value, and b represents the intermediate principle stress coefficients; s is a constant value relevant to the rock mass and it can be determined in the two following equations: m
Kinematic Method of Limit Analysis. e seismic stability analysis is performed within the framework of limit analysis theory [25]
To get the upper bound solution, the construction of velocity is required in the method. e implementation of the kinematic method of limit analysis depends on the following fundamental inequality [26]: Θex U ≤ Θmr U, (7)
Summary
Θmru + Θmrl − Θug − Θuq + Θuhs − Θlhs − Θlg h1 + h22r0ωe(θ−θ1)tan φ sin(θ − β) − V cos(β − θ)cos
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