Interaction between transverse isotropy rock slope and supporting structure

Abstract

In order to study the interaction between transverse isotropy rock mass and supporting structure, the laboratory tests for rock sampled from the slope at expressway project were carried out, and the parameters of elasticity for transverse isotropic rock were determined by the uniaxial compression tests for rock sample with different strike of stratification plane. Then, based on the relationship of stress—stain for transverse isotropic rock mass, the analytical model was established for the interaction between transverse isotropic rock mass and frame beam with pre-stressed anchor cable. Furthermore, the conception of the best anchorage-angle in pre-stressed anchor cable was proposed. At last, the parameters of the interaction between transverse isotropy rock mass and frame beam with pre-stressed anchor cable were investigated by finite element method, and the best anchorage-angle in pre-stressed anchor cable was obtained. The rules of the influence of the directivity of stratification plane on supporting structure were determined. The results show that the analytical model and numerical method on the design of pre-stressed anchor cable with frame beam supporting for transverse isotropy rock slope are reasonable and reliable in practical engineering design.