This book focuses on some technical problems encountered in shield tunneling in hard–soft uneven stratum and extremely soft stratum, based on the recent shield tunneling engineering practice, and summarizes the achievements of shield tunneling in view of the technical problems from an overall and objective perspective. There are 6 chapters in this book. Chapter 1 introduces the development trend of shield tunneling method, defines classification of various stratum where shield tunneling applies, and mainly analyses the selection of shield machines and the configuration of cutters. Chapters 2 to 5 elaborates the strata characteristics and construction difficulties under various stratum conditions, puts forward adaptive selection and design keys of shield in various stratum, and emphatically analyses and summarizes the stability control technologies of shield tunnel face and driving control technology by case studies. Chapter 6 introduces the shield chamber opening technologies under hyperbaric condition, emphatically presents the basic requirements and operational preparations for the shield chamber opening, and puts forward innovative ideas of operation procedures, control points of key procedures, and safety requirements of shield chamber opening under hyperbaric condition.
Author(s): Kairong Hong
Series: Key Technologies for Tunnel Construction under Complex Geological and Environmental Conditions
Publisher: Springer
Year: 2021
Language: English
Pages: 348
City: Singapore
Foreword by Jun Sun
Foreword by Qihu Qian
Preface
About This Book
Contents
1 Strata Classification and Equipment Selection
1.1 Overview
1.2 Classification of Strata
1.2.1 Relatively Homogeneous Strata
1.2.2 Soft-Hard Uneven Composite Strata
1.3 Shield Type Selection Design
1.3.1 Principles and Basis of Type Selection
1.3.2 Cutter Head Selection and Cutter Configuration
2 Shield Treatment Technology in Upper Soft and Lower Hard Composite Strata
2.1 Stratum Characteristics and Construction Difficulties
2.1.1 Stratum Characteristics
2.1.2 Construction Difficulties
2.2 Shield Adaptability Selection Design
2.2.1 Selection Principles and Basis
2.2.2 Adaptability Design of Composite Strata
2.3 Shield Tunneling Excavation Face Stability Control Technology
2.3.1 Formation Deformation Mechanism
2.3.2 Stratum Uplift-Subsidence Process Analysis
2.3.3 Influencing Factors of Ground Uplift-Subsidence
2.3.4 Stability Mechanism of Shield Excavation Face
2.4 Shield Tunneling Technology in Upper Soft and Lower Hard Composite Strata
2.4.1 Main Technical Measures
2.4.2 Main Parameters Setting
2.4.3 Shield Attitude Control
2.4.4 Muck Improvement
2.4.5 Synchronous Grouting
2.4.6 Secondary Grouting
2.5 Typical Cases
2.5.1 Nanjing Metro Line 3
2.5.2 Nanchang Rail Transit Line 2
3 Shield Tunneling Treatment Technology in Boulder Stratum
3.1 Stratum Characteristics and Construction Difficulties
3.1.1 Stratum Characteristics
3.1.2 Difficulties in Construction
3.2 Boulders Detection and Processing Technology
3.2.1 Boulders Detection Technology
3.2.2 Boulder Treatment Technology
3.3 Shield Type Adaptability Selection Design
3.3.1 Selection Principles and Basis
3.3.2 Adaptability Design of Boulder Stratum
3.4 Shield Excavation Surface Stability Control Technology
3.4.1 Slurry Balance Shield Excavation Surface Stabilization Technology
3.4.2 Stability Technology of Excavation Face of EPB Shield
3.5 Shield Tunneling Control Technology in Boulder Stratum
3.5.1 General Idea
3.5.2 Construction Control Key Points and Technical Measures
3.5.3 Setting and Analysis of Driving Parameters
3.5.4 Analysis of Abnormal Driving Conditions
3.5.5 Synchronous Grouting
3.5.6 Secondary Grouting
3.6 Typical Cases
3.6.1 Taishan Nuclear Power Diversion Tunnel Project
3.6.2 Dongguan Rapid Rail Transit
3.6.3 Shenzhen Metro Line 11
4 Shield Treatment Technology for Large-Size Pebble Stratum
4.1 Stratum Characteristics and Construction Difficulties
4.1.1 Stratum Characteristics
4.1.2 Construction Difficulties
4.2 Shield Type Adaptability Selection Design
4.2.1 Selection Principle and Basis
4.2.2 Pebble Stratum Adaptability Design
4.3 Treatment Technology of Pebble Stratum with Large Particle Size
4.3.1 Characteristics Analysis of Sandy Pebble Stratum
4.3.2 Treatment Technology of Large-Size Pebble
4.4 Stability Control Technology of Shield Excavation Face
4.4.1 Slurry Balance Shield Control Technology
4.4.2 Control Technology of EPB Shield
4.5 Shield Tunneling Technology for Large Particle Size Pebble Stratum
4.5.1 Main Technical Measures
4.5.2 Setting of Main Parameters
4.5.3 Shield Attitude Control
4.5.4 Muck Improvement
4.5.5 Preparation and Construction Technology of Synchronous Grouting Slurry
4.5.6 Surface Lagging Collapse Control
4.6 Typical Cases
4.6.1 Beijing Metro Line 10
4.6.2 Chengdu Metro Line 4
5 Shield Treatment Technology in Extremely Soft Stratum
5.1 Stratum Characteristics and Construction Difficulties
5.1.1 Stratum Characteristics
5.1.2 Construction Difficulties
5.2 Shield Type Adaptability Selection Design
5.2.1 Selection Principle and Basis
5.2.2 Adaptive Design of Extremely Soft Stratum
5.3 Reinforcement Technology for Extremely Soft Stratum
5.3.1 Triaxial Mixing Pile
5.3.2 Rotary Jet Grouting Pile
5.3.3 Freezing Method
5.4 Stability Control Technology of Shield Excavation Face
5.4.1 Stability Mechanism of Excavation Face
5.4.2 Deformation Mechanism of Soft Soil Stratum
5.4.3 Main Control Measures
5.5 Shield Tunneling Technology in Extremely Soft Stratum
5.5.1 Tunneling Control Technology
5.5.2 Attitude Control and Adjustment
5.5.3 Muck Management
5.5.4 Synchronous Grouting
5.5.5 Secondary Grouting
5.5.6 Monitoring and Measurement
5.6 Typical Cases
5.6.1 Hangzhou Metro Line 2
5.6.2 Suzhou Rail Transit Line 4
6 Chamber Opening Under Pressure Technology of Shield
6.1 Basic Provisions
6.1.1 Mandatory Provisions
6.1.2 General Provisions
6.2 Operation Preparation
6.3 Operation Implementation
6.3.1 Operation Process
6.3.2 Operation Contents and Requirements
6.3.3 Key Operation Points of Key Process
6.3.4 Operation Implementation
6.3.5 Operation Effect Judgment
6.3.6 Chamber Door Closing
6.4 Safety Requirements and Occupational Health
6.4.1 Safety Requirements for Conventional Operation in Chamber under Pressure
6.4.2 Occupational Health
6.5 Operation Risk Identification and Emergency Treatment
6.5.1 Operation Risk Identification
6.5.2 Emergency Treatment
6.5.3 Targeted Treatment Measures
Bibliography
