Study on Creep and Fracturing of High Antidip Sandwich Rock Slope in High In Situ Stress

Abstract:

The paper set an example of high antidip sandwich rock slope to study its creep and fracturing deformation in high in-situ stresses at Jinping First Stage Hydropower Station in China. The slope creep deformation before and after excavation could be found on slope face and in exploration adits. Displacements at 4 monitoring points on the slope were abnormal for influences of fault f_42-9, zone SL_44-1 and lamprophyre dike, which indicate creep and fracturing of the big block separated by them. Through stereographic projection analysis, intersection of controlling structural planes of the big block direct outside the slope. Its bottom slide face, fault f42-9, has internal friction angle smaller than depression angle of the intersection line. Barricade in front of the big block removed by slope excavation decreased resistance to slope slide. It is concluded that creep and fracturing deformation of the big block is controlling stability of the slope.

• Periodical: Applied Mechanics and Materials (Volumes 405-408)
• Pages: 527-534
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.405-408.527
• Online since: September 2013
• Authors: Qi Wu*, Xu Biao Deng
• Keywords: Creep and Fracturing, High Antidip Sandwich Rock Slope, High In Situ Stresses, Jinping First Stage Hydropower Station

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