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以分離元素法探討板岩邊坡變形機制 = A study on the de...

國立高雄大學土木與環境工程學系碩士班

以分離元素法探討板岩邊坡變形機制 = A study on the deformational mechanism of slate slopes using discrete element method

Record Type:	Language materials, printed : monographic
Paralel Title:	A study on the deformational mechanism of slate slopes using discrete element method
Author:	莊庭鳳,
Secondary Intellectual Responsibility:	國立高雄大學
Place of Publication:	[高雄市]
Published:	撰者;
Year of Publication:	2014[民103]
Description:	132面圖，表 : 30公分;
Subject:	分離元素法
Subject:	discrete element method
Online resource:	http://handle.ncl.edu.tw/11296/ndltd/65321150137567835721
Notes:	參考書目：面117-118
Notes:	103年12月16日公開
Summary:	有鑑於現地觀察到之板岩邊坡重力變形型態，再加上近年來高強度、長延時之降雨頻率漸增，導致許多坡地災害的發生，突顯出板岩邊坡崩塌發生潛勢之事前判斷與評估的重要性。為了模擬板岩邊坡之重力變形行為，本研究將現地所觀察到的邊坡特性簡化至室內物理模型試驗，並探討三種影響因素下之運動行為，分別為邊坡角度、葉理角度與岩性弱化。再利用物理模型試驗中各力學性質與所得到之重力變形行為，代入以分離元素法為理論基礎之數值分析軟體PFC3D進行模擬。綜合以上試驗與模擬結果，結論如下：(1)由物理實驗得知，試體在變形過程中主要分為兩大類，翻覆破壞與褶皺破壞。翻覆破壞主要分布於高葉理角度之逆向坡；褶皺破壞主要發生於低葉理角度之順向坡，這種破壞形式不只因邊坡受到重力的影響，更因遭受水的弱化，於坡趾處產生折彎變形。(2) 根據數值模擬所得出的模擬成果與物理實驗成果進行比對，確立此種模擬方法之可行性，並整理出邊坡在不同角度、葉理角度、弱化下之變形型態，供日後滑動分析參考。 According to the gravitational deformation of slate slope in the field, this study explored the influencing factors,including the slope angle, the foliation angle, and the material deterioration on the deformation characteristics. To simulate these phenomena, a series of physical model experiments with simplified environmental conditions were performed in the laboratory. Then, the discrete element software, PFC3D was used for simulations to further our understanding of deformation behavior in slate slopes under the long-term influence of gravity and material deterioration. According to the physical model tests and numerical simulations the results possesses the following characteristics:(1) Based on the model tests, two kinds of gravitational deformation of slate slope are identified, the first one is overturning destruction, it appears in the obsequent slope with high angle foliation. The other one is fold extrusion near the slope toe, it exhibits in the consequent slope with low angle foliations. It is not only influenced by gravitation but also by wet deterioration.(2) The results of physical model test provide the basic case for the verification of discrete element simulation. The simulated deformed patterns agree well with the actual deformation under different slope angles. Therefore, the model of discrete element method and associated parameters are verified, and they could be used for the subsequent analysis in the future.

以分離元素法探討板岩邊坡變形機制 = A study on the deformational mechanism of slate slopes using discrete element method
莊, 庭鳳

以分離元素法探討板岩邊坡變形機制 = A study on the deformational mechanism of slate slopes using discrete element method / 莊庭鳳撰 - [高雄市] : 撰者, 2014[民103]. - 132面 ; 圖，表 ; 30公分.
參考書目：面117-118103年12月16日公開.
分離元素法discrete element method

以分離元素法探討板岩邊坡變形機制 = A study on the deformational mechanism of slate slopes using discrete element method
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330 $a 有鑑於現地觀察到之板岩邊坡重力變形型態，再加上近年來高強度、長延時之降雨頻率漸增，導致許多坡地災害的發生，突顯出板岩邊坡崩塌發生潛勢之事前判斷與評估的重要性。為了模擬板岩邊坡之重力變形行為，本研究將現地所觀察到的邊坡特性簡化至室內物理模型試驗，並探討三種影響因素下之運動行為，分別為邊坡角度、葉理角度與岩性弱化。再利用物理模型試驗中各力學性質與所得到之重力變形行為，代入以分離元素法為理論基礎之數值分析軟體PFC3D進行模擬。綜合以上試驗與模擬結果，結論如下：(1)由物理實驗得知，試體在變形過程中主要分為兩大類，翻覆破壞與褶皺破壞。翻覆破壞主要分布於高葉理角度之逆向坡；褶皺破壞主要發生於低葉理角度之順向坡，這種破壞形式不只因邊坡受到重力的影響，更因遭受水的弱化，於坡趾處產生折彎變形。(2) 根據數值模擬所得出的模擬成果與物理實驗成果進行比對，確立此種模擬方法之可行性，並整理出邊坡在不同角度、葉理角度、弱化下之變形型態，供日後滑動分析參考。 According to the gravitational deformation of slate slope in the field, this study explored the influencing factors,including the slope angle, the foliation angle, and the material deterioration on the deformation characteristics. To simulate these phenomena, a series of physical model experiments with simplified environmental conditions were performed in the laboratory. Then, the discrete element software, PFC3D was used for simulations to further our understanding of deformation behavior in slate slopes under the long-term influence of gravity and material deterioration. According to the physical model tests and numerical simulations the results possesses the following characteristics:(1) Based on the model tests, two kinds of gravitational deformation of slate slope are identified, the first one is overturning destruction, it appears in the obsequent slope with high angle foliation. The other one is fold extrusion near the slope toe, it exhibits in the consequent slope with low angle foliations. It is not only influenced by gravitation but also by wet deterioration.(2) The results of physical model test provide the basic case for the verification of discrete element simulation. The simulated deformed patterns agree well with the actual deformation under different slope angles. Therefore, the model of discrete element method and associated parameters are verified, and they could be used for the subsequent analysis in the future.
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