The Effect of Testing Conditions on Automatic Compaction Results

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Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/94516

Title:	The Effect of Testing Conditions on Automatic Compaction Results
Authors:	阮輝煌;Hoang, Nguyen Huy
Contributors:	土木工程學系
Keywords:	自動夯實;最佳含水量;夯實曲線;automatic compaction;optimum water content;compaction curve
Date:	2024-07-31
Issue Date:	2024-10-09 14:50:56 (UTC+8)
Publisher:	國立中央大學
Abstract:	摘要土壤夯實在大地工程界中使用廣泛，而夯實試驗在其中起著非常重要的作用，夯實後的土壤呈不飽合狀態，空隙中含有空氣和水，這些試驗目的在於優化土壤的乾密度，從而減少未來在荷種下土壤的沉陷量並降低土壤的滲透性，夯實的完整程度會影響結構的耐久性和穩定性，若夯實度未達標準會導致道路和飛行場的結構失效以及因基礎沉降引起的損壞。因此，土壤夯實對於土木工程來說是非常重要的實驗。本研究的主要目的是增強現有的土壤夯實過程知識，以及測試不同實驗條件對自動夯實結果的影響；本研究將介紹自動夯實機的設計、開發過程和使用方法，並重點介紹自動夯實機的實用性，自動夯實機將取代傳統的手工夯實，因為傳統夯實法有許多限制。本研究的重點是針對具有不同塑性的各種土壤進行夯實試驗，在不同的水分含量和多種測試條件下進行壓實試驗，例如超過手動方法能力的壓實能量、以探索土壤在實驗階段的行為、觀察和評估其對結果的影響以及評估這種模型在預測土壤壓實行為方面的有效性。試驗結果顯示，自動夯實機在可比的能量水平下提供了穩定且可重複的夯實結果，實現了更高的乾密度和更低的空隙含量。此外，自動夯實機能夠獨立控制夯實能量並控制夯垂落下速度，顯示出自動夯實機的多功能性和高效性。本研究發現，自動夯實機相較於傳統手動方法具有顯著優勢，包括較好的穩定性、高效率以及潛在的更高壓實能量水平。這些發現表明，自動夯實機未來在大地工程界中會是一個有價值的工具，值得進一步研究和發展。關鍵詞: 自動夯實, 最佳含水量, 夯實曲線;ABSTRACT Soil compaction is widely applied and compaction tests play a crucial role in geotechnical engineering. Compacted soils are inherently unsaturated, containing both air and water in their voids. These tests aim to optimize the dry density of soils, which helps minimize future settlement under load and decrease soil permeability. Achieving proper compaction is directly linked to the durability and stability of various structures. Inadequate compaction often leads to structural failures in roads and airfields, as well as damage due to foundation settlement. Therefore, soil compaction is essential for any engineering projects involving earthworks. The primary objective of this research is to enhance the existing knowledge of the soil compaction process and the testing condition′s effect on automatic compaction results. This study will introduce the design, development, and user manual and focus on the usefulness of automatic compaction machines, which will replace traditional manual compaction because of their many limitations. The research focuses on compaction tests conducted on various soils with different plasticity characteristics combined with varying contents of water under diverse testing conditions, such as compaction energy efforts that surpass the capabilities of manual methods to explore the experimental behavior of soils, observe and evaluate the effect on results in the experimental phase; and assessing the effectiveness of this model in predicting soil compaction behavior. The results indicate that the automatic compaction machine provides consistent and reproducible compaction results, achieving higher dry densities and lower air void contents at comparable energy levels. Additionally, the ability to control hammer velocity independently from compaction energy highlights the machine′s versatility and efficiency. This study concludes that the automatic compaction machine offers significant advantages over traditional manual methods, including improved consistency, efficiency, and the potential for higher compaction energy levels. These findings suggest that the automatic compaction machine is a valuable tool for future geotechnical engineering applications, warranting further research and development. Keywords: automatic compaction, optimum water content, compaction curve
Appears in Collections:	[Graduate Institute of Civil Engineering] Electronic Thesis & Dissertation

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