关键词: 边坡工程, 爆破荷载, 等效方法, QUAKE/W, FLAC^3D

Abstract: The excavation of a highcut slope using blasting method in the Highway Bridge Crossing Yangtze River of Hubei Baiyang Project was evaluated using QUAKE/W and SLOPE/W modules in the commercial software Geostudio. The blasting loading in the time domain was input using the actual accelerationtime spectrum. Further, finite element software FLAC3D was used to simulate the real time reaction under the dynamic blasting loading using equivalent triangular loading distribution method. The overall stability of the cut slope, stress, strain distribution, deformation, particle velocity at monitored points and the distribution of the plastic zone were analyzed. The numerical analysis results indicated that, the blasting load could only affect the stability of the cut stability within limited area and the blasting load would not result in the overall slope stability. The numerical analysis results are consistent with the site observations during the construction.

Key words: slope engineering, blasting loading, equivalent method, QUAKE/W, FLAC^3D