以離散元素法及田口直交表分析預切溝槽誘發水下淤泥連續坍滑之成效

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研究生：	周子健 Daniel Thomas Chou
論文名稱：	以離散元素法及田口直交表分析預切溝槽誘發水下淤泥連續坍滑之成效 Evaluate the Effect of Pre-cut Trenches on Underwater Marine Sediment Sliding using Discrete Element Method and Taguchi Orthogonal Array
指導教授：	廖洪鈞 Hung-Jiun Liao
口試委員:	林祺皓 Chi-Hao Lin 陳堯中 Yao-Chung Chen 廖洪鈞 Hung-Jiun Liao
學位類別：	碩士 Master
系所名稱：	工程學院 - 營建工程系 Department of Civil and Construction Engineering
論文出版年：	2018
畢業學年度：	106
語文別：	中文
論文頁數：	185
中文關鍵詞：	邊坡滑動、溝槽、淤泥清除、離散元素、耦合分析、田口直交表
外文關鍵詞：	landslide, cut cavity, desilting, discrete element method, coupling analysis, Taguchi orthogonal array
相關次數：	點閱：258 下載：8
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查詢本校圖書館目錄查詢臺灣博碩士論文知識加值系統勘誤回報

臺灣各地之水庫之淤泥淤積問題日益嚴重，大幅影響用水品質以
及蓄水效率。此現象乃因造山運動以及侵蝕沉積作用同時發生，水庫
的存在造成原本受沖刷且應沉積於下游之土沙淤泥淤積於水庫之中。
近年來台灣已投入相當大量之經費及人力探討水庫淤泥清除方法，但
肇因於水庫淤泥清除作業之可控制因子較少之緣故，現有方法之效果
十分有限。
本研究承接以水力鑽孔誘引水中淤泥邊坡連續滑動之可行性研
究，其主要內容為建立水下邊坡之數值模型，並以離散元素法(DEM)
和計算流體力學(CFD)進行耦合分析，模擬以水刀切削出之孔洞或溝
槽，對引發水下邊坡連續坍滑，並由排砂隧道排出之適當方法。研究
重點包含探討溝槽之位置、尺寸等參數，與淤泥經由排淤隧道排出庫
區之效率關係。並利用離散元素法之特性結合品質工程領域之田口直
交表，求解出不同之水流速度下，最佳淤泥清除率之溝槽之位置和尺
寸。並以本研究之結果印證以高壓水刀於淤泥坡腳預先切削溝槽確實
能加速與提升淤泥排除之效率。

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.

目錄
摘要 ..................................................................................................... I
Abstract .............................................................................................. II
致謝 ................................................................................................... III
目錄 .................................................................................................. IV
圖目錄 ............................................................................................. VII
表目錄 ........................................................................................... XVI
第一章 緒論 ...................................................................................... 1
1 前言 ..................................................................................... 1
2 研究動機與目的 ................................................................. 2
3 研究內容 ............................................................................. 3
第二章 文獻回顧 .............................................................................. 4
1 國內水庫概述 ..................................................................... 4
1.1 台灣水庫淤積狀況 .................................................. 8
1.2 水庫淤積特性 ........................................................ 14
1.3 國內外水庫排砂清淤技術 .................................... 16
2 防淤工程之案例—曾文水庫排淤隧道 ........................... 27
2.1 莫拉克颱風對曾文水庫之影響 ............................ 27
2.2 防淤隧道工程簡介 ................................................ 29


V

2.3 防淤工程預估效益 ................................................ 31
3 接觸力學理論回顧 ........................................................... 32
4 品質工程與實驗設計之流程 ........................................... 35
4.1 實驗設計流程 ........................................................ 35
4.2 傳統實驗策略 (Typical Test Strategies) ............... 38
4.3 改良之實驗策略 .................................................... 40
4.4 直交表 .................................................................... 42
4.5 資料分析 ................................................................ 48
5 高壓灌漿柱體截面積之研究 ........................................... 49
5.1 高壓灌漿改良之分類與柱體截面積 .................... 49
5.2 多重扇形截面積與本研究之連結 ........................ 53
第三章 數值分析法 ........................................................................ 55
1 數值分析軟體簡介 ........................................................... 56
1.1 SolidWorks 簡介...................................................... 56
1.2 EDEM 之基本理論架構 ......................................... 57
1.3 ANSYS-Fluent 之基本理論架構 ............................ 70
1.4 Pix4Dmapper 簡介 .................................................. 78
2 研究目的與流程 ............................................................... 85
3 參數設定 ........................................................................... 87


VI

3.1 室內試驗 ................................................................ 90
3.2 數值分析試驗 ...................................................... 105
4 水下邊坡模型建立與分析 ............................................. 121
4.1 模型假設 .............................................................. 121
4.2 淤泥顆粒之堆疊與流體耦合分析 ...................... 124
4.3 溝槽切削直交表分析 .......................................... 136
第四章 數值分析結果之探討 ...................................................... 153
1 切削溝槽之配置對排除率影響 ..................................... 153
2 有切削溝槽與無溝槽之水下邊坡於耦合分析中之影像
擷取比較......................................................................................... 155
3 切削溝槽對不同時間下之排除率影響 ......................... 159
4 切削溝槽對不同流速下之排除率影響 ......................... 169
第五章 結論與建議 ...................................................................... 179
1 結論 ................................................................................. 179
2 建議 ................................................................................. 181
參考文獻......................................................................................... 182 
                                

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