葉理岩體之超音波速探討

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姓名

高嘉偉(Jia-Wei Gao) 查詢紙本館藏

畢業系所

土木工程學系

論文名稱

葉理岩體之超音波速探討
(Study of ultrasonic velocity in foliated rocks)

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摘要(中)

本文使用乾點式超音波試驗儀，以不同入射角量測天然岩石之超音波速，並針對具葉理之天然片岩以波速極座標圖呈現不同葉理夾角之波速異向性。參數研究方面，以不同波速、厚度互層排列方式作為參數變因，引用司乃爾定律(Snell’s law)計算不同模型葉理夾角之波速，以了解各項變因對波速極座標圖之影響。最後，本文以層狀互層材料模擬天然片岩之波速極座標圖，擬根據研究結果，探討葉理岩石波速異向性之成因及機制。

摘要(英)

The compositions, arrangement and mineral crystal orientation of rocks are affected by precipitation, earth stress or temperature... physical and chemical reactions during the diagenesis process. Hence, the mechanical behaviors (i.e. strength, elastic modulus, Poisson′s ratio…) usually accompany anisotropy properties, such as: schist or jointed rock mass. For geotechnical engineering, the rock mechanical anisotropy plays an important role for tunnel, slope designs, and their constructions. Non-destructive ultrasonic testing can evaluate strength and deformability of rock material, which provides in-situ judgment basis.
This paper presents Snell’s law to investigate wave propagation behavior of anisotropic rocks. This paper analyzes P-wave anisotropy of natural rocks from previous studies, and observes 3 different shapes of P-wave anisotropy, includes circular, ellipse, dumbbell-shaped, eye shape. Parametric study is addressed for determining the shapes of P-wave anisotropy. Finally, this paper will clarify the cause of P-wave anisotropy according to the parametric study.

關鍵字(中)

★ 葉理岩體
★ 縱波異向性
★ 橫向等向性岩石
★ 超音波

關鍵字(英)

★ foliated rocks
★ P-wave anisotropy
★ transversely isotropic rock
★ ultrasonic

論文目次

摘要 I
ABSTRACT II
誌謝 III
目錄 IV
圖目錄 VI
表目錄 XIII
第一章緒論 1
1-1 研究背景與動機 1
1-2 研究方法與目的 2
1-3 論文架構 2
1-4 研究流程圖 3
第二章文獻回顧 4
2-1 異向性 4
2-2 超音波性質概述 10
2-3 岩石與超音波波速相關性質 20
2-4 橫向等向性材料與超音波之相關研究 32
第三章實驗規劃 52
3-1 試驗方法 52
3-2 超音波速試驗 52
3-3 本文模式推導 60
第四章結果分析與討論 71
4-1 天然岩石超音波速量測 71
4-2 參數研究 89
4-3 理論模擬與天然岩石超音波速之比較 115
第五章結論與建議 123
5-1 結論 123
5-2 建議 125
參考文獻 126
附錄A 超音波儀器校正塊之量測波速值 129
附錄B 天然岩石之各角度超音波速值 130

參考文獻

[1] 王麒瑋，?層狀材料波傳行為之研究?，碩士論文，國立中央大學土木工程學系，中壢(2009)。
[2] 胡庭秉，「超音波儀器之組裝及異向性岩石之超音波特性」，碩士論文，國立交通大學土木工程系，新竹(1995)。
[3] 張家銘，「以熱探針法量測大地材料熱傳導係數之適用性」，國立中央大學土木工程系，中壢(2006)。
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指導教授

田永銘(Yong-Ming Tien)

審核日期

2017-1-25

推文