Influence of weak interlayer parameters for anchored interface shear action of rock slope under earthquake

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (8) : 48-53.

LI Yapeng 1, 2, YAN Zhixin 2

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Abstract

A model of anchored rock slope with weak interlayer was established using the FLAC3D program.The influence of the weak interlayer parameters on the displacement response and the anchored interface shear action was studied.The sensitivity analysis of the weak interlayer parameters was carried out through an orthogonal experiment.The result of numerical simulation shows that the shear stress on the anchorage interface changes in steps with time, and its change is closely related to the energy of ground motion; with the increase of the thickness of the weak interlayer, the permanent displacement of slope and the peak shear stress all increase, and with the increase of cohesion and internal friction angle, they all decrease; with the increase of dip, they increase first and then decrease; the sensitivity of weak interlayer parameters to interface shear stress from great to small is the dip, cohesion, internal friction angle, thickness of weak interlayer.

Key words

anchored rock slope / weak interlayer / bolt-grout interface / grout-rock interface / permanent displacement / peak shear stress / orthogonal experiment

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LI Yapeng 1, 2, YAN Zhixin 2. Influence of weak interlayer parameters for anchored interface shear action of rock slope under earthquake[J]. Journal of Vibration and Shock, 2019, 38(8): 48-53

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