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| Stability evaluation of creeping landslide considering variation of initial conditions |
| DU Yan1，2，LU Yongdu1，XIE Mowen1，JIA Jinlu2，CONG Xiaoming2，WU Yunquan1 |
| (1. Beijing Key Laboratory of Urban Underground Space Engineering，University of Science and Technology Beijing，Beijing 100083，China；2. Comprehensive Survey of Construction Research and Design Institute Co.，Ltd.，Beijing 100007，China) |
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Abstract Creeping landslide causes significant erosion，regulate hill-slope angles and topographic relief，and is one of the main geological disasters that damage infrastructure. Therefore，the stability evaluation of creeping landslide has important scientific significance and application value in the engineering field. Traditional limit equilibrium method and numerical simulation often do not consider the information of initial slip conditions changed by the settlement of the trailing edge slope，thus they cannot explain the stepped deformation of creeping landslide. Based on the creeping landslide experimental case，this study focuses on the mechanism of creeping landslide，establishes a new mechanical model and evaluates its stability. The results show that the settlement of the fault zone changes the initial condition of the slope. The cause of the creeping landslide is that the initial kinetic energy is not zero. Considering the change of the initial conditions，the stability coefficient once dropped below 1.0，which reflected and explained the stepped deformation of creeping landslide. When evaluating the stability of creep-type landslides on the fault zone，it is necessary to consider not only the changing mechanical indexes and boundary conditions such as groundwater，but also the initial condition information changed by the environmental variation such as large settlement of trailing edge slope. The improved stability evaluation method can offer a foundation for better responses to creeping landslide in engineering.
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2020, Vol. 39 
