Study on failure mode and stability of reserved rock in front of anti-slide piles

doi:10.16265/j.cnki.issn1003-3033.2022.05.0935

Abstract

Abstract:

In order to study stability of rock mass reserved in front of anti-slide piles under large excavation condition, deformation and failure modes of reserved rock mass at different widths were tested and analyzed based on similarity theory. Secondly, formulas for stability calculation of rock mass under different failure modes were deduced according to limit equilibrium theory. Finally, with landslide in Hunan province as research object, stability variance features of the mass under each failure mode was analyzed. The results show that along with increase of width, deformation trend of reserved rock is always in the form of deformation of the excavation surface - a few cracks - local uplift deformation in front of piles. The rock mass with larger width is prone to up-slide failure, while that with smaller width is prone to down-slide one. As width increases, stability coefficient increases in form of a quadratic function with the opening upward under down-slide failure.

Key words: anti-slide pile, reserved rock, failure mode, stability, sliding failure, landslide treatment

ZHU Dapeng, HE Lei, TIAN Li, QIN Liangkai. Study on failure mode and stability of reserved rock in front of anti-slide piles[J]. China Safety Science Journal, 2022, 32(5): 84-89.

Figures/Tables 11

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