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研究生： 廖勇明
Leomitro, Nikodemus
論文名稱： 使用自然與回收物質運用在黏土質砂之地盤改良
Ground Improvement in Clayey Sand Using Natural and Recycle Materials
指導教授： 吳建宏
Wu, Jian-Hong
李德河
Lee, Der-Her
學位類別： 碩士
Master
系所名稱： 工學院 - 土木工程學系
Department of Civil Engineering
論文出版年： 2019
畢業學年度： 107
語文別： 英文
論文頁數： 166
中文關鍵詞： 非凝聚性土壤 、石灰穩定 、回收材料 、夯實試驗 、直接剪力試驗
外文關鍵詞： Cohesion-less soil, Lime stabilization, Recycle materials, Compaction test, Direct shear test.
相關次數： 點閱：125  下載：1 
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    • 近年來，意識到氣候變遷的發生，對大地工程師來說，適應氣候變遷對大地工程的影響，是一個很大的挑戰。在基礎建設需求很大的發展中國家，常面臨的土壤問題是非凝聚性土壤的強度較弱，需要進行土壤改良使土壤強度提升。本研究採用的土壤穩定技術，是利用天然及回收材料來提高土壤強度，優點是材料容易取得，在適當的混合比例下，能夠降低構造物的預算，並且達到環境友善的目的。本研究將2%、5%及10%的生石灰做為天然黏合劑分別加入含有2%、5%及10%稻殼灰(RHA)的土壤中，再將長度小於1公分的椰子纖維(CF)以2%的比例，分別加入強度最強以及最弱的試體中，並將純砂試體養護0天(3小時)，含有椰子纖維以及未含有椰子纖維的試體分別養護7、14、28、56、90、150、200天。最後，透過以下試驗：比重試驗、粒徑分析試驗、阿太堡限度試驗、滲透性試驗、夯實試驗以及直剪試驗求得本研究之土壤基本性質參數。結果發現，依照比例添加稻殼灰(RHA)會降低最大乾密度，但是會提高最佳含水量，此外，天然和回收材料是能夠有效改善土壤強度參數C、ф的技術。

    Realized climate change is happening in this era, it is one of a big challenge for geotechnical engineers to adopt impact of climate change in geotechnical projects. During highly infrastructures demand in developing countries, soil problems is often faced with cohesion-less soil which has weak of strength, it may to be improved to make the soil is suitable to use. Soil stabilization technique conducted in this research which using natural and recycled materials to improve soil strength. The materials are easy to obtain, it will decrease the construction budget and achieve environmental friendly in suitable mixture proportion. Quick lime as natural binder material was added into the soil at 2%, 5% and 10% followed Rice Husk Ash (RHA) by 2%, 5%, and 10%. Coconut Fiber (CF) were added into strongest and weakest specimens at 2% with ≤ 1 cm of length. The samples were cured for 0 days (3 hours) for pure sand proportion, 7, 14, 28, 56, 90, 150, 200 days for without CF proportions, and 7, 14, 28, 56 days with CF. Basic properties of soil in this research are decided to conduct the following test: specific gravity determination, grain size analysis, Atterberg limits, permeability test, compaction test, and direct shear test. Added RHA into proportion will decrease the Maximum Dry Density, however, improve the Optimum Moisture Content. The results are found that the stabilization using natural and recycled materials are an effective technique to improve soil strength and parameters for c and ф.

    CONTENTS ABSTRACT III ACKNOWLEDGEMENT VI CONTENTS VIII FIGURES LIST X TABLES LIST XII CHAPTER I INTRODUCTION 1 1.1 Background Research 1 1.2 Objective and Motivation 4 1.3 Hypothesis 5 1.4 Research Limitation 5 1.5 Research Methods 5 CHAPTER II LITERATURE REVIEW 8 2.1 Soil Stabilization 8 2.1.1 Improvement Materials 8 2.1.2 Study and Some Application of Soil Stabilization 12 2.2 Shear Strength of Soils 13 CHAPTER III RESEARCH METHOD 18 3.1 Specific Gravity of Soil 19 3.2 Grain Size Distribution Analysis 22 3.2.1 Hydrometer Test 25 3.2.2 Mechanical Test 27 3.2.3 Liquid Limit Test 28 3.2.4 Classification Of Soils For Engineering 32 3.3 Constant Head Permeability Test 32 3.4 Proportion Determination and Compaction Test 36 3.5 Preparing Samples and Direct Shear Test 42 3.5.1 Preparing Samples 42 3.5.2 Direct Shear Test 45 CHAPTER IV RESEARCH RESULT 50 4.1 Specific Gravity of Soil Test 50 4.2 Grain Size Distribution Analysis 51 4.3 Liquid Limit Test and Plasticity Index 58 4.4 Soil Classification 60 4.5 Constant Head Permeability Test 61 4.6 Compaction Test and Samples Preparation 63 4.7 Direct Shear Test 68 CHAPTER V CONCLUSIONS AND RECOMMENDATIONS 99 5.1 Conclusions 99 5.2 Recommendations 100 REFERENCES 101 APPENDICES 105 Appendix 1 Shea。r Stress with Horizontal Displacement Curve witho。ut Coconut Fiber 105 Appendix 2 Shear Stress without Coconut Fiber within Curing Time Period 134 Appendix 3 Shear Stress with Horizontal Displacement Curve Using Coconut Fiber 140 Appendix 4 Shear Stress Using Coconut Fiber within Curing Time Period 144 Appendix 5 Shear Stress with Normal Stress without Coconut Fiber 145 Appendix 6 Shear Stress with Normal Stress Using Coconut Fiber 159 Appendix 7 Shear Stress with Horizontal Displacement Using Coconut Fiber (Length Check) 161 Appendix 8 Shear Stress with Horizontal Displacement Using Coconut Fiber (Percentage Check) 164 Appendix 9 Comments From the Oral Defense Committee Members 165

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