In this paper, the motion and acceleration process, as well as the mechanism of a high speed and long run landslide are investigated by adopting high speed ring shear test and taking the landslide occurred at Yigong R...In this paper, the motion and acceleration process, as well as the mechanism of a high speed and long run landslide are investigated by adopting high speed ring shear test and taking the landslide occurred at Yigong River in Bomi, Tibet on April 9, 2000 as the background. According to the motion characteristics of high-speed and long distance motion landside, the mechanism is studied under different conditions such as shear speed, consolidated drained and consolidated undrained status. Results show that high speed shearing process hinders and delays the dissipation of pore pressure, and drives pore water migrating to shear zone slowly. Both of water content and fine particle content at shear zone are obviously higher than those in other layers; and soil liquefaction occurs at shear zone in the saturated consolidated undrained ring shear tests. The effective internal friction angle of the consolidated undrained soil is much lower than that of the consolidated drained soil under ring shearing. The results also indicate that the shearing speed affecting the strength of soil to some extent. The higher the ring shearing speed is, the lower the strength of soil is. This investigation provides a preliminary interpretation of the mechanism of the motion and acceleration process of the Yigong landslide, occurred in Tibet in 2000.展开更多
四、土工模拟模型及其应用改进的雪撬模型是一种司靠地预测滑坡运动距离的方法。但是关于滑坡危害范围仅仅预测运动距离是不够的,面积预测也需要解决。 Iwasa等人在1980年,Takahashi等人在1986年曾做出了洪水淹没面积预测。Takahashi等...四、土工模拟模型及其应用改进的雪撬模型是一种司靠地预测滑坡运动距离的方法。但是关于滑坡危害范围仅仅预测运动距离是不够的,面积预测也需要解决。 Iwasa等人在1980年,Takahashi等人在1986年曾做出了洪水淹没面积预测。Takahashi等人应用同样的方法曾对Nevado del Ruiz火山泥流做过预测。在他们的研究方法中,洪水和泥流都是在二维水平面按流体来对待的,并假定没有摩阻力。所以。展开更多
基金financial aided by the National Basic Research Program of China (2012CB026103)the National Natural Science Foundation of China (Grant Nos. 41172283, 41372313)
文摘In this paper, the motion and acceleration process, as well as the mechanism of a high speed and long run landslide are investigated by adopting high speed ring shear test and taking the landslide occurred at Yigong River in Bomi, Tibet on April 9, 2000 as the background. According to the motion characteristics of high-speed and long distance motion landside, the mechanism is studied under different conditions such as shear speed, consolidated drained and consolidated undrained status. Results show that high speed shearing process hinders and delays the dissipation of pore pressure, and drives pore water migrating to shear zone slowly. Both of water content and fine particle content at shear zone are obviously higher than those in other layers; and soil liquefaction occurs at shear zone in the saturated consolidated undrained ring shear tests. The effective internal friction angle of the consolidated undrained soil is much lower than that of the consolidated drained soil under ring shearing. The results also indicate that the shearing speed affecting the strength of soil to some extent. The higher the ring shearing speed is, the lower the strength of soil is. This investigation provides a preliminary interpretation of the mechanism of the motion and acceleration process of the Yigong landslide, occurred in Tibet in 2000.
文摘四、土工模拟模型及其应用改进的雪撬模型是一种司靠地预测滑坡运动距离的方法。但是关于滑坡危害范围仅仅预测运动距离是不够的,面积预测也需要解决。 Iwasa等人在1980年,Takahashi等人在1986年曾做出了洪水淹没面积预测。Takahashi等人应用同样的方法曾对Nevado del Ruiz火山泥流做过预测。在他们的研究方法中,洪水和泥流都是在二维水平面按流体来对待的,并假定没有摩阻力。所以。
