臺灣博碩士論文加值系統

本研究將微生物誘導碳酸鈣沉澱(MICP)技術應用於抑制海岸侵蝕，並針對相關的基本性質如：菌液濃度、配比、施工方式、噴灑方式以及抑制波浪侵蝕之成效進行研究。MICP主要是利用微生物加速成岩作用，進而使砂、土結晶固化的一種新興技術。本研究首先針對適用之菌種，進行擴大培養。並依台灣現地之砂樣搭配不同濃度之膠結液進行固結試驗，了解MICP應用於台灣天然砂樣的固化效果。再藉由動床模型試驗探討施作工法、菌液噴灑方式並做出初步結論。以上述所得出之最適施作方式及噴灑方法後，進行MICP對於抑制海岸侵蝕功效試驗。研究結果顯示，MICP能確實固化取自台灣海岸之砂種，並且隨著MICP中膠結液濃度(0.5M~1.5M)的增加，試體工程性能也會隨之提升，其抗壓強度值可從無凝聚力之散砂提升至517.3kPa。而MICP的施工方式會影響砂樣的膠結方式，如採用直接灌入法，很可能會造成差異侵蝕之現象，或不是海岸工程所樂見的，故建議採用表面均勻噴灑。於各波浪規模H0/L0=0.0172、0.0215、0.0258試驗中，施作MICP後相較於未施作MICP抑制了25.6%、33.8%、40.8%之最大沖刷深度，驗證了MICP應用於抑制海岸侵蝕是可行的。

The traditional construction methods for beach protection are not sustainable and eco-friendly for long-term consideration. For the alternative countermeasure, a Microbial-Induced Calcium Carbonate Precipitation (MICP) technology by natural and not pathogenic microorganisms was proposed for mitigating beach erosion in this study. Natural sand from the west coast of Taiwan was first bearing Unconfined Compressive Strength (UCS) test for the solidification properties test. Increasing the concentration of the solidification solution would improve the compressive strength, up to 517.3 kPa with 1.5 M. Besides, a small-scaled wave tank was employed to investigate the treated method include one-phase or two-phase and surface spraying or underground injection. The results indicate that the two-phase method increases the anti-erosion ability of the beach than the one-phase method. On the other hand, the underground injection method might cause uneven consolidation; the surface spraying could avoid this situation. Under the optimal treated method in this study, the MICP technology reduced the maximum beach erosion depth by about 25.6%、33.8% and 40.8% under the H0/L0=0.0172、0.0215 and 0.0258, respectively.

目錄
摘要 i
Abstract ii
目錄 iv
表目錄 viii
圖目錄 ix
符號說明 xiv
第一章 緒論 1
1.1 前言 1
1.2 文獻回顧 3
1.2.1 微生物誘導碳酸鈣沉澱 3
1.2.2 MICP應用案例 7
1.2.3 微生物巴斯德孢子菌(Sporosarcina pasteurii) 10
1.2.4 環境因素對S.P.菌及MICP之影響 12
1.2.5 MICP施作工法 27
1.3 研究動機及目的 28
1.4 試驗規劃流程 29
1.5 本文架構 30
第二章 材料與方法 32
2.1 S.P.菌培養 32
2.1.1 微生物活化培養基試驗 32
2.1.2 微生物擴大發酵培養 37
2.2 工程性能之比較 41
2.3.1 試驗用砂 42
2.3.2 試驗溶液 44
2.3.3 試驗儀器 45
2.3.4 重模試體製作 46
2.3 MICP施作工法、試驗溶液噴灑方式之影響 50
2.3.1 試驗材料 50
2.3.2 試驗設備與配置 51
2.3.3 試驗儀器率定 53
2.3.4 試驗波浪條件 54
2.3.5 動床模型製作與試驗步驟 55
2.4 MICP應用於抑制海岸侵蝕試驗 61
2.4.1 動床模型配置 61
2.4.2 試驗波浪條件 62
第三章 結果與討論 63
3.1 工程性能之比較 63
3.1.1 膠結液濃度之影響 64
3.1.2 不同砂樣之影響 65
3.2 MICP施作工法、試驗溶液噴灑方式之影響 67
3.2.1 MICP施作工法之影響 68
3.2.2 MICP噴灑方式之影響 71
3.3 MICP應用於抑制海岸侵蝕試驗 74
3.3.1 斷面比較 75
3.3.2 最大沖刷深度比較 80
第四章 結論與建議 85
4.1結論 85
4.2建議 86
參考書目 88

 

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