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系統識別號 U0026-0508201414145600
論文名稱(中文) 小波分析於含樁帽基樁非破壞檢測之研究
論文名稱(英文) Application of Wavelet Analysis on Non-Destructive Testing of Pile Cap
校院名稱 成功大學
系所名稱(中) 土木工程學系
系所名稱(英) Department of Civil Engineering
學年度 102
學期 2
出版年 103
研究生(中文) 申崇明
研究生(英文) Jason Shen
學號 N66017114
學位類別 碩士
語文別 英文
論文頁數 128頁
口試委員 口試委員-張文忠
指導教授-倪勝火
口試委員-宋見春
口試委員-陳景文
口試委員-謝旭昇
中文關鍵字 基樁  樁帽  非破壞檢測  脈波反應法  離散小波轉換 
英文關鍵字 pile  pile cap  nondestructive  impulse response method  discrete wavelet transform 
學科別分類
中文摘要 本研究採脈波反應法來檢測六支有同缺陷在不同深度和位置的含樁帽基樁,用以分析樁帽之厚度,缺陷之位置,和基樁長度。本研究將實驗所得之時域訊號以離散小波轉換進行拆解,過濾掉含雜訊之高頻階層後,重新組裝以完成濾波。另也嘗試使用離散小波轉換將樁底與缺陷頻率之訊號分離,以突顯缺陷之訊號進行分析。
研究結果顯示,含樁帽基樁之樁底和缺陷訊號在使用離散小波轉換率波前,無法判別出任何結果。使用本研究提出之後,對於含樁帽基樁長度的估計尚為準確,但缺陷訊號和樁帽厚度訊號因反射訊號還是不明顯。
英文摘要 This study used the impulse response method to estimate pile length, pile cap thickness, and defect locations of a group pile in NCKU. Discrete wavelet transform was used to decompose the velocity time history data obtained from field tests. Filtering was done by removing the decomposed layers that contained high frequency noises and reconstruct the rest of the layers. Discrete wavelet transform was also used to separate the reflected defect signals from noises and reflected pile bottom signal to estimate the defect locations.
The results of the estimation of pile bottom are acceptable. However, the estimations of the thickness of pile cap and defect locations are not as prominent.
論文目次 ABSTRACT I
中文摘要 II
誌謝 III
Table of Contents IV
List of Tables VII
List of Figures VIII
SYMBOLS XIII
CHAPTER 1 INTRODUCTION 1
1.1 Research Motivation 1
1.2 Research Purpose and Method 2
1.3 Content 3
CHAPTER 2 LITERATURE REVIEW 5
2.1 Introdction 5
2.2 Pile NDT Methods 5
2.3 Literature Review 10
CHAPTER 3 BASIC THEORIES 15
3.1 Basic Wave Theory 15
3.2 Pile Wave Propagation Theory 21
3.2.1 Boundary conditions 24
3.2.2 Discontinuities of pile 29
3.3 Wavelet Analysis 33
3.3.1 Wavelet transform 34
3.3.2 Continuous wavelet transform (CWT) 38
3.3.3 Discrete wavelet transform 39
3.3.4 Wavelet transform application 41
3.4 Sonic Echo Method 42
3.5 Impulse Response Method 44
CHAPTER 4 FIELD TESTING AND ANALYZING 49
4.1 Introduction 49
4.2 Test Location 49
4.3 Design of Pile and Pile Cap 50
4.3.1 Design of piles 50
4.3.2 Design of pile cap 56
4.4 Testing Instruments 60
4.5 Testing Procedure 67
CHAPTER 5: RESULTS AND DISCUSSIONS 75
5.1 Introduction 75
5.2 Pile Length 76
5.2.1 Pile length results of pile A 76
5.2.2 Pile length results of pile B 80
5.2.3 Pile length results of pile C 83
5.2.4 Pile length results of pile D 86
5.2.5 Pile length results of pile E 89
5.2.6 Pile length results of pile F 92
5.2.7 Pile length summary 95
5.3 Pile Cap Thickness 95
5.4 Defect Locations 100
5.4.1 Defect location result of pile B 100
5.4.2 Defect location result of pile C 102
5.4.3 Defect location result of pile D 105
5.4.4 Defect location result of pile E 108
5.4.5 Defect location result of pile F 113
5.4.6 Defect location summary 117
Chapter 6: CONCLUSIONS AND SUGGESTIONS 119
6.1 Conclusions 119
6.2 Suggestions 120
REFERENCES 121
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