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論文中文名稱:The Prediction and 3D Numerical Analysis of Jacking Force for Microtunneling EPB Machine [以論文名稱查詢館藏系統]
論文英文名稱:The Prediction and 3D Numerical Analysis of Jacking Force for Microtunneling EPB Machine [以論文名稱查詢館藏系統]
中文姓名:Nevillle Mc Artjir Demus
英文姓名:Nevillle Mc Artjir Demus
英文關鍵詞:Pipe JackingJacking ForceEarth Balance Pressure MachineInitial ForceFrictional ResistanceLubricant, MisalignmentSoil Classification
在過去十年中,大量的學者投入在對免開挖技術的使用以及總推力預測公式的修正,並且成功地完成了許多涉及摩擦力和總推力預測公式的研究。鑑於大地工程理論已經成熟,已經實現了計算機輔助軟件和3D Plaxis模型的快速升級,數值分析與3D Plaxis在隧道設計中的應用逐漸在大地工程中發揮了重要作用。
本研究中,詳細說明了以前學者的五個預測模型,並將預測模式中最好的兩個預測方程式與一個新的修改公式進行了比較,以選出最適合用於現場的預測公式。此外,通過設置相關的控制參數使用3D Plaxis進行數值分析,這有助於我們更好地了解總推力預測公式,因為它與土壤的位移,應力和應變以及可能對周圍環境造成的環境影響有關。
論文英文摘要:Due to the commencement of the green building material in 2004 in Taiwan, there has been good coordination with the “National Primary Plan for Energy Conservation and Carbon Reduction” carried out by the Executive Yuan in April 2010 which has ambition to bring Taiwan to a low-carbon society in a systematical way and achieve the goal for carbon reduction. Therefore, with such an attempt, the control and specification of building materials and method of construction has to take into consideration the impact on the environment.
Moreover, the deteriorating conditions and under-capacity of aging underground infrastructure including water and wastewater distribution and collection systems, gas, petroleum and chemical pipelines, electrical and communication network and other utility corridors have resulted in trenchless technology as the method to fix the problem without disturbing the natural environment.
In the past, interest in use of trenchless technology and the modification of formulas to predict the total jacking force has increased in the last decade and a number of studies that dealt with the frictional forces and predictive formulas have been successfully completed. In view of the fact that the theory of geotechnical engineering has matured, there has been an implementation of computer aided software and rapid upgrades of 3D plaxis models. The application of numerical analysis methods and use of 3D plaxis in tunnel design have gradually played an important role in geotechnical engineering.
In this study, five (5) predictive models from previous scholars were stated in detailed and two of them were compared with a new modified model to ascertain the most suitable one for the given site. In addition, a numerical analysis was carried out using the PLAXIS Finite Element 3D Program by setting the relevant control parameters. This helps us better understand the jacking forces as it relates to displacement, stress, and strain on the soil as well as possible environmental impacts on the surrounding area
論文目次:Chinese Abstract ……………………………………………………………………………. i
English Abstract ………………………………………………………………………….... ii
Acknowledgement …………………………………………………………………………..iv
Chapter 1 Introduction 1
1.1 Background and Motivation 1
1.2 Purpose of the Study 3
1.3 Outline of Study 5
Chapter 2 Introduction of Jacking Components and Machine Details 8
2.1 Project Introduction 8
2.2 Earth Pressure Balance Boring Machine (EPBM) 11
2.3 The Three Pipe Jacking Shields 14
2.3.1 The Cutting Head Shield 15
2.3.2 The Middle Shield 18
2.3.3 The Rear Shield 20
2.5 Maneuvering the EPBM 23
2.6 Bentonite Equipment 30
2.7 Operation of EPBM 31
2.7.1 Sedimentation Tank 33
2.7.2 The Slurry Feed Tank 34
2.7.3 Water Level Controller 36
2.7.4 Slurry discharge pump 37
2.8 Control Container Equipment 38
2.8.1 Hydraulic Power Pack 40
2.8.2 Cutting Disk Torque 41
2.9 Disposal of Excavated Soil 43
Chapter 3 Numerical Analysis of 3D PLAXIS 44
3.1 Local site parameters 44
3.2 Introduction of 3D PLAXIS 47
3.2.1 PLAXIS Services 48
3.2.2 PLAXIS Features 48
3.3 3D PLAXIS Model and Results 55
Chapter 4 Prediction Models for Jacking Forces 64
4.1 Jacking Force Prediction Models 64
4.1.1 Model 1 64
4.1.2 Model 2 66
4.1.3 Model 3 71
4.1.4 Model 4 77
4.1.5 Model 5 82
4.2 Jacking Force Estimation Results 88
4.2.1 Calculations of face plate resistance for the three models: 89
4.3 Calculation of soil frictional coefficient from the estimated frictional resistance in models 4, 5 and 6. 94
Chapter 5 Conclusion and Suggestions 105
5.1 Conclusion 105
5.1.1 General observation: 105
5.1.2 Model observation: 106
5.2 Suggestions 108
References 109
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