Thick Layer Of Loose High And Steep Slope Of The Formation Mechanism And Stability Studies

The No.2 landslide is the greatest high-steep landslide with the hugeness-thickness and incoherent in 102 landslide group of Sichuan-Tibet highway. There are the 300m incoherent material here, and the capacity is 5,100,000m~3. However, in the process of Qinghai-Tibet rised intensely, the place comes forth the incoherent material, which is a exceptional phenomenon. As a result, it is important for us to analyse the problem.On the basis of collecting, analyzing, and cleaning up many predecessors' datum, through analyzing specific character of tectonics activity, earthquake activity, glacier activity, and debris flow hazard activity, anthor conclude that the base rock had been formed much incoherent material by the action of faulted structure function, ground stress function, glacier function, frost thawing function and disaster function. Then , by glacier and debris flow transportation function, these material had been accumulated rapidly at the relative concave landform. Further, under the action of continual bathe of the river and rain, the landform has been evolved the high-steep landslide of the hugeness-thickness and incoherent. And then, author creates a mechanics pattern of the side slope formation mechanism, and simulates the sliding process of the landslide in 1991. In end, author conforms the mechanics parameter's synthesis value of incoherent material by applying the counter analyse of limit equilibrium, and, by the parameter value,appraises the stability of the high-steep landslide backside NO.2 landslide in order to offering the reference of harnessing further the high-steep landslide of the hugeness-thickness and incoherent here.