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研究生： Hesbon Moriasi Okari
Hesbon - Moriasi Okari
論文名稱： Validation of a theoretical generalized tunneling thrust prediction model and mechanized underground excavation indices:Case studies
Validation of a theoretical generalized tunneling thrust prediction model and mechanized underground excavation indices:Case studies
指導教授： 陳堯中
Yao-chung Chen
陳立憲
Li-hsien Chen
口試委員: 陳志南
Chee-nan Chen
學位類別： 碩士
Master
系所名稱： 工程學院 - 營建工程系
Department of Civil and Construction Engineering
論文出版年： 2015
畢業學年度： 103
語文別： 英文
論文頁數： 136
中文關鍵詞： thrust prediction model 、TBM performance index 、case studies
外文關鍵詞： thrust prediction model, TBM performance index, case studies
相關次數： 點閱：200  下載：0 
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    • This research explores the performance of underground mechanical excavation systems in the field. A general analytical estimation model developed earlier that enables analysis of underground mechanical excavation in similar geological conditions to be compared is subjected to verification using real case studies. It relied on understanding of the rock/soil cutting process at the machine-geomaterial interaction interface, geomaterial properties, machine characteristics and mathematical techniques of dimensional analysis. The study presents a theoretical tunneling thrust prediction model that systematically builds upon soil-machine interactions.It also presents an analytical estimation to deal with tunneling management in different mechanised excavation methods (tunnel boring machine, shield tunnel and pipe jacking), construction types (earth pressure balance, slurry pressure balance, thick-mud), and geological conditions (soil, gravel and rock) by normalizing their total thrust system using dimensional analysis.
    The results from this study reveal interesting findings. First, that thrust can be given as a range of critical values. Also developed are dimensionless parameters that can be used to cluster rock/soil cutting into clusters. Second, that real-time data would be used to predict inefficient or hazardous cutting conditions. The study results show a promising method of monitoring tunneling machine performance given more data and sensitivity analysis.

    This research explores the performance of underground mechanical excavation systems in the field. A general analytical estimation model developed earlier that enables analysis of underground mechanical excavation in similar geological conditions to be compared is subjected to verification using real case studies. It relied on understanding of the rock/soil cutting process at the machine-geomaterial interaction interface, geomaterial properties, machine characteristics and mathematical techniques of dimensional analysis. The study presents a theoretical tunneling thrust prediction model that systematically builds upon soil-machine interactions.It also presents an analytical estimation to deal with tunneling management in different mechanised excavation methods (tunnel boring machine, shield tunnel and pipe jacking), construction types (earth pressure balance, slurry pressure balance, thick-mud), and geological conditions (soil, gravel and rock) by normalizing their total thrust system using dimensional analysis.
    The results from this study reveal interesting findings. First, that thrust can be given as a range of critical values. Also developed are dimensionless parameters that can be used to cluster rock/soil cutting into clusters. Second, that real-time data would be used to predict inefficient or hazardous cutting conditions. The study results show a promising method of monitoring tunneling machine performance given more data and sensitivity analysis.

    TABLE OF CONTENTS Abstract ………………………………………………………………………………………… iii Dedication ……………………………………………………………………………………… iv Acknowledgement ………………………………………………………………………………. v LIST OF TABLES ………………………………………………………………………….…. ix LIST OF FIGURES ……………………………………………………………………………. xi 1 INTRODUCTION 11 1.1 Motivation and Purpose 11 1.2 Research Method and Scope 13 1.3 Content and outline 14 2 LITERATURE REVIEW 16 2.1 Description of underground mechanized excavation methods 17 2.2 Current practice in assessment of thrust for mechanized underground excavation 24 2.3 Generalized mechanical excavation mechanism 35 2.3.1 Cutting mechanism I: factors influencing single cutter damage mechanics at contact field 38 2.3.2 Cutting mechanism II: Double cutter-optimum spacing 43 2.3.3 Cutting mechanism III：Factors affecting overall cutterhead configuration 45 2.4 Generalized indentation formula 45 2.4.1 Evolution of indentation damage 46 2.4.2 Theoretical solution to indentation damage 47 2.4.3 Effect of cutter wearing 48 2.5 Analysis of mechanized tunnel excavation indices 50 3 REVIEW OF THEORETICAL DERIVATION OF GENERALIZED TUNNELING THRUST MODEL 56 3.1 Front resistance 59 3.1.1 Single and group cutter contact thrust of geological penetration 59 3.1.2 Face plate geology penetration contact thrust 62 3.2 Boring machine body resistance 63 3.2.1 Submerged weight 65 3.2.2 Estimation of Contact arc length 65 3.3 Pipe body resistance 68 3.4 Estimation of maximum and minimum resistance 70 3.5 Comparison of thrust assessment for different tunneling methods 73 3.6 Dimensional Analysis and Similarity 82 3.6.1 Establishing relationships among quantities 82 3.6.2 Conversion into dimensionless parameters 84 3.6.3 Application of dimensional analysis in mechanical cutting 86 3.7 Overview of the physics of mechanized excavation 88 3.8 Dimensional analysis of mechanized excavation factors 89 3.9 Establishing the cuttability indices 91 3.9.1 Dimensionless factor of geological materials 91 3.9.2 Dimensionless factors of propulsion forces 93 4 METHODOLOGY 94 4.1 Introduction 94 4.2 Data collection 94 4.2.1 Principal sources 94 4.2.2 Additional sources 95 4.3 General approach to the problem 95 4.3.1 GT thrust model 95 4.3.2 Indices 95 5 CASE STUDIES AND DISCUSSION 97 5.1 Case 1: New Taipei City Yonghe District sewer system 97 5.1.1 Underground tunneling conditions survey 97 5.1.2 Machine parameters 102 5.1.3 Tunneling resistance assessment 103 5.1.4 Thrust Discussion 108 5.1.5 Cuttability indices 114 5.2 Case II-Deep Tunnel Sewerage System in Singapore 124 5.2.1 Underground tunneling conditions survey 125 5.2.2 Thrust Index 125 5.2.3 Torque Index 126 5.3 Database 128 6 CONCLUSIONS AND RECOMMENDATIONS 130 6.1 Conclusions 130 6.2 Future work 131

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