CONTENTS 1.Introduction 2.Open Excavation 3.Conventional Tunneling 4.Mechanical Tunneling 5.Immersed Tube Tunnel Method 6.Shafts Construction 7.Conclusion 百年同濟2 TONGILUNIVERSITY 2 1. Introduction 2. Open Excavation 3. Conventional Tunneling 4. Mechanical Tunneling 5. Immersed Tube Tunnel Method 6. Shafts Construction 7. Conclusion CONTENTS