Model tests and analysis on development process of debris flow

• Main Authors: Li-Kang Hu, 胡立康
• Other Authors: Ching-Chuan Huang
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/42103570850700513335

碩士 === 國立暨南國際大學 === 地震與防災工程研究所 === 94 === Experiments on the development of debris flow using flume and slope model tests are performed to investigate the following two factors：(1) The density of soil and (2) Rainfall intensity. Feasibility of using the method of superposition to calculate the discharge vs. time relationship of debris flow is also studied. Test results show that saturation and seepage at the toe of the slope are signs of the beginning of intensive sand discharge. Two stages of the sand discharge curve are observed. The first stage show abrupt increase of the sand discharge associated the liquefaction of slope toe. The second stage show fluctuated sand discharge curves associated with retrogressive failure of the slope. Between the two factors examined, the rainfall intensity has a stronger influence on the time and peak value of sand discharge. The method of linear superposition seems to work well based on some limited flume and model slope test results.