Shaking Table Test on Earthquake Response of Discontinuous Medium High and Steep Rock Slope

Abstract

Abstract:

Abstract： Seismic response of rock slope with discontinuous is mainly affected by its geometrical and mechanical properties. Due to its reverse or bedding joints, high and steep rock slope is at high risk of collapse and damage. To solve this problem, the dynamic response and failure mechanism were studied using a largescale shaking table test. The rock material was prepared with cement, sand, iron powder, clay and mixture. The discontinuous joint was imitated using Teflon fabric with low skin-friction coefficient. The experimental results indicate that there are three steps during the failure, that is, development of cracks, spalling of the slope, collapse and sliding. The main slide surface appears at the height of 2/3 of the slope, along the Teflon fabric. The internal acceleration of the slope shows an obvious amplification effect along the slope surface, and horizontal acceleration is more effective. Besides, as the earthquake intensity increase, the acceleration amplification increases near the tip of the slope.

Key words: high and steep rock slope, discontinuous joints, shaking table test, dynamic response, failure mechanism

CLC Number:

TU 455

WANG Bin,CHE Ailan,GE Xiurun. Shaking Table Test on Earthquake Response of Discontinuous Medium High and Steep Rock Slope[J]. Journal of Shanghai Jiaotong University, 2015, 49(07): 951-956.

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