Evaluate the Effect of Pre-cut Trenches on Underwater Marine Sediment Sliding using Discrete Element Method and Taguchi Orthogonal Array
碩士 === 國立臺灣科技大學 === 營建工程系 === 106 === The issues of reservoir desilting in Taiwan have become a crucial problem for the national security, it causes the quality deterioration of running water and the reduction of reservoir storage. Although many efforts have been tried to develop methods and to impr...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2018
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| Online Access: | http://ndltd.ncl.edu.tw/handle/4pt69v |
| Summary: | 碩士 === 國立臺灣科技大學 === 營建工程系 === 106 === The issues of reservoir desilting in Taiwan have become a crucial
problem for the national security, it causes the quality deterioration of
running water and the reduction of reservoir storage. Although many
efforts have been tried to develop methods and to improve the efficiency
of reservoir desilting in the recent years, the problem of desilting is still
remained.
The purpose of this study is to propose a continuous landslide
mechanism to increase the efficiency of reservoir desilting through
discharging tunnel, it uses a series of pre-cut cavities in the reservoir
sediment to trigger the continuous landslide mechanism. The cavities are
created using high pressure water jetting method which is commonly used
in the jet grouting practice. This study is conducted by using Discrete
Element Method (DEM) coupled with Computational Fluid Dynamics
(CFD). It focuses on describing the relationship between layout and
dimension of jet cutting cavity and the efficiency of reservoir desilting.
The Taguchi Orthogonal Array is adopted here to solve the
muti-parameters problem of this study. The results of this study show that
the efficiency of desilting by jet cutting trenches in the sediment slope
can be quantified and the optimal layout and dimension of cavities to
maximige the desilting efficiency is proposed.
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