Abstract
The high‐steep rock slope stability is one of the key technologies in the construction of water conservancy and hydropower projects, which affects and restricts the development of hydraulic resources and the construction of hydropower projects. In this paper, a three‐dimensional numerical model was built incorporating stratigraphy, geological structures, and the inverted rock mechanical parameters to perform displacement, stress, and plastic zone analyses for an excavated slope in China using the FLAC3D software. The numerical simulation results after slope excavation show that the deformation near the fault fracture zone is the largest, ranging from 350 mm to 380 mm. The compressive stress is concentrated on the slope foot and the connecting part, the stress value is 2 MPa∼5 MPa, there is a large tensile stress area in the slope, and the tensile stress value is 0 MPa∼0.4 MPa. The plastic zone of the slope is concentrated near the fault F6 and the structural influence zone, and the rock mass of the slope basically enters the plastic state. On this basis, the deformation mechanism of slope was analyzed, while the internal and external factors affecting the slope deformation were described in detail. This work would provide an effective reference basis for slope stability evaluation and treatment of similar hydropower stations.
Highlights
Academic Editor: Chunshun Zhang e high-steep rock slope stability is one of the key technologies in the construction of water conservancy and hydropower projects, which affects and restricts the development of hydraulic resources and the construction of hydropower projects
The appropriate mechanical parameters of slope rock mass constitute the foundation, upon which, the smooth progress of slope stability calculation could be ensured. rough the geological information analysis of the slope in Xiaowan Hydropower Station and according to the deformation and damage in the excavation of the accumulation slope, the shear strength parameters of the accumulation slope were inverted through the rigid limit equilibrium method
The results indicated that the deep-seated cracks played a significant role in the slide surface location designation [32]. e time-dependent behavior of the left bank abutment slope at Jinping I Hydropower Station had a major influence on the normal operation and long-term safety of the hydropower station
Summary
E artificial slope below 925 m was the bottom layer of thin dolomite fold, the strike of rock stratum was nearly E-W, the dip angle ranged from 70° to 85°, and the dip. The overall quality of the rock mass on the left-side slope of the exit of the flood discharge tunnel was poor. Since the left-side slope of the flood discharge tunnel had sustained deformation during the slope excavation, the deformation law and stability of the high-steep slope during the long-term construction of the Wudongde Hydropower Project were the main concerns. Erefore, the stability study of the left-side high slope of the flood discharge tunnel was of high significance for the safe construction and longterm operational safety of the Wudongde Hydropower Project Since the left-side slope of the flood discharge tunnel had sustained deformation during the slope excavation, the deformation law and stability of the high-steep slope during the long-term construction of the Wudongde Hydropower Project were the main concerns. erefore, the stability study of the left-side high slope of the flood discharge tunnel was of high significance for the safe construction and longterm operational safety of the Wudongde Hydropower Project
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