Study on the Reinforcement Mechanism of the Deep Replacement Caverns for the Giant Slope Block Combined by Structural Planes

The left bank of the cushion pond Baihetan hydropower station is a slant and dip slope. gently inclined intra-layer fault zones, steep-dip faults unloading fissures cutting slope to form several potentially unstable blocks. computational results show that stabilities blocks are controlled by zones. A method treatment applying deep replacement caverns load-reduction excavation was proposed reinforce In order study reinforcement mechanism for giant 3D simulation analysis construction carried out use FLAC3D software, geo-mechanical model developed carry experimental research. calculation experiment concrete effectively control shear sliding deformation bottom slide surface improve stability combined structural surfaces. process strength reduction overloading, cracking gradually extended from inner part, stresses front cavern largest all caverns. Therefore, it more beneficial increasing size cavern. research have important guiding significance in similar projects.