科研之友
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摘要
Through analyzing the deformation characteristics of ground surface and slip zone, variation of the pore water pressure, combined with geolocial structure of the debris and the verification of limit equilibrium calculation, the creep deformation mechanisms of the debris has been studied and the stability has been evaluated. These provide a reliable basis for development and implementation of engineering measures. It is found that the disturbance caused by excavation leads to a shear deformation dislocation along the old slip zone, and then formed bottom-up microcracks inside the debris. It was filled with water inside the microcracks near the slip within a certern elevation range. Groundwater within the microcracks would generate hydrostatic pressure on the sliding body and increase hydrostatic pressure in the slip zone. These changes will reduce stability facter and exacerbate the deformation of the debris. The deformation slows down because of the dissipation of the hydrostatic pressure and healing of the microcracks caused by finishing of the cutting and construction of drainage holes. The research results provide reference value for future similar comprehensive analysis of the slope monitoring data, deformation mechanisms analysis and engineering treatment.
