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这篇论文探讨了滑坡危害范围的预测方法,这对于减少滑坡灾害是很必要的。雪橇模型用于解释滑坡运动已有很长时间了,因为这一模型简单且假定合理。但是,它不能确定滑坡运动期间的摩擦系数(视摩擦系数)。作者提出用新型高速环剪仪确定视摩阻,并用新公式表达典型条件下滑坡运动期间的孔隙水压力。包含通过试验室确定滑坡运动期间视摩阻的雪橇模型称之为“改进的雪橇模型”,并且已应用于Ontake(御岳)碎屑崩塌和Jizukiyama滑坡,其结果表明,在这两个事件中观察到的高流动性可由此得到正确的解释。为了绘制危害预测图,作者提出了用土力学和流体力学相结合的模拟滑坡运动的新方法。这一新的模拟模型采用了两个土工参数,一个是滑面上的视摩阻,它解决“滑坡运动多远”,另一个是运动体内部的侧压力系数,它解决“滑坡横向扩展多宽”。这一方法在模型斜坡和Qntake碎屑崩塌中的应用均得到了较好的结果,从而说明,该方法可以做为预测危害范围的可靠依据。
This paper discusses prediction methods for the landslide hazard range, which is necessary to reduce landslide hazards. The sled model has been used to explain the landslide movement for a long time because the model is simple and reasonable. However, it cannot determine the coefficient of friction (viscosity) during landslide movement. The authors proposed a new high-speed ring shear meter to determine the apparent friction resistance, and used a new formula to express the pore water pressure during the typical conditions of landslide movement. The sleigh model that includes the determination of the frictional resistance during landslide movement through the laboratory is called “improved sled model” and has been applied to Ontake debris collapse and Jizukiyama landslides. The results show that observations in these two events were observed. The high mobility reached can be explained correctly. In order to draw hazard prediction maps, the authors proposed a new method for simulating landslide movement combined with soil mechanics and fluid mechanics. This new simulation model uses two geotechnical parameters, one is the frictional resistance on the slip surface, which solves “how far the landslide moves” and the other is the lateral pressure coefficient inside the moving body, which solves the “lateral expansion of the landslide”. width". This method has obtained good results in the application of model slopes and Qntake debris collapse, which shows that this method can be used as a reliable basis for predicting the scope of hazards.