Journal
ROCK MECHANICS AND ROCK ENGINEERING
Volume 53, Issue 10, Pages 4583-4598Publisher
SPRINGER WIEN
DOI: 10.1007/s00603-020-02188-y
Keywords
Rock mass structural plane; Deterioration effect; Permanent displacement; Rock slope stability
Funding
- National Natural Science Foundation of China [41977252]
- Sichuan Provincial Youth Science and Technology Innovation Team Special Projects of China [2017TD0018]
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection of the Chengdu University of Technology Open Fund [SKLGP2020K015, SKLGP2019K010]
- Team Project of Independent Research of SKLGP [SKLGP2016Z001]
- Key Technology Projects of Transportantion Industry in 2018 [2018-ZD5-029]
Ask authors/readers for more resources
When a rock mass shears along a structural plane, the shear resistance of the structural plane is affected by the structural plane undulations and by the friction between the contact regions. During an earthquake, the seismic load (composed of the cyclic and dynamic loads) produces a dynamic deterioration of the mechanical properties of the structural plane, which is mainly reflected as follows: (1) under cyclic shear of the seismic load, the undulant angle alpha(k)decreases. (2) Under the dynamic load, the frictional coefficient of the structural surface is reduced. The dilatancy angle is generally used instead of the undulant angle. When calculating rock slope stability, the frictional angle is equivalent to the sum of the basic frictional angle and the undulant angle. In this study, the equations for calculating the dilatancy angle of a structural plane under cyclic shear loading are determined based on cyclic shear tests of a split structural plane. The basic frictional angle for calculating the cyclic shear is also determined, based on previous research. Furthermore, according to the dynamic model of a rock slope, a method to calculate the permanent displacement of the rock slope is proposed, considering the effect of structural plane deterioration. We found that the effect of structural plane deterioration under a seismic load directly affects the stability and permanent displacement of the rock slope. The feasibility and engineering practicalities of this method are also verified by comparing the proposed method with previously developed methods.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available