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INSTRUCTOR: David Abbott
Course Length: 20 Hours
Purpose and Background
This tunneling on-demand seminar includes the selection and installation of tunnel lining, the construction of shafts, key aspects of design, specification, cost, and construction and risk management during tunnel design and construction. Utilizing the tunneling techniques and numerous case studies will be discussed. Three case histories in soft ground, hard rock, and microtunneling and six videos of tunneling will be presented.
Learning Outcomes
Upon completion of this seminar, you will be able to:
- Specify the site investigation requirements and their strengths and limitations for tunnel design and construction in soils and rock
- Classify subsurface materials with relation to their excavation and support performance in tunnel in soils and rock
- Understand and better select the appropriate tunneling method and tunnel lining system for a given combination of soils, groundwater, tunnel diameter and depths
- Apply the modern principles of risk management and mitigation in both the design and construction of tunnels
Assessment of Learning Outcomes
Students' achievement of the learning outcomes will be assessed via a short post-assessment (true-false, multiple choice and fill in the blank questions).
Who Should Attend?
Construction and project managers, design and project engineers (both field and design office), construction supervisory personnel, construction cost estimators, graduate geotechnical engineers and individuals in the construction industry either wanting a better grounding in modern tunneling techniques and practices or an update on current technical and contractual tunnel management techniques.
Course Outline
Introduction
- Seminar Overview
- Participants background
- Review of tunnel sizes and principal uses
- An explanation of trenchless techniques
Sub Surface Characterization for Soft Ground
- Geotechnical investigation for soft ground tunneling
- Soils classification of soils for tunneling
Tunnel Construction in Soft Ground
- A brief historical overview of soft ground tunneling
- Hand excavation and simple tunnel machines
- Excavator shields in competent ground
- NATM (New Austrian Tunneling Method)
- Soft Ground Slurry Tunneling
- Soft Ground Tunneling using EPB systems
- Other shield types for soft ground
- Compressed air tunneling
Tunnel Lining Selection and Design for Soft Ground
- Soft ground tunneling ground support system selection
- Two pass linings (Rib & Lag linings)
- One pass linings
- Segmental linings
- Jacked pipe linings
Case History: Soft Ground Tunneling Group Workshop Session
Sub Surface Characterization for Rock
- Geotechnical site investigation for rock tunneling
- Rock classification of rock mass for tunneling
Tunnel Construction In Rock
- A brief historical overview of rock tunneling
- Review of rock excavation methods
- Drill & Blast tunnels
- Road headers in competent ground
- Hard rock tunneling with TBMs
- Other techniques for hard rock tunneling
- Tunnel excavation performance evaluation
Tunnel Lining Selection and Design for Rock Tunnels
- Rock tunnel support system selection
- Supports to hard rock tunnels (rock bolting etc.)
Shaft Construction for Tunneling
- Review of all available techniques and their suitability
- Rib & lag & steel supports
- Sheet piles
- Jet grouting
- Caissons
- Slurry walls
- Ground freezing
Case History: Hard rock tunneling Group Workshop Session
Pipe Jacking and Microtunneling
- Pipe jacking capabilities, equipment and techniques
- Microtunneling capabilities, equipment and techniques
- Jacking pipe for pipe jacking/microtunneling
- Specialist techniques for microtunneling
- Case histories
Case History: Microtunneling Group Workshop Session
Potential Problems in Tunneling and Shaft Construction for Tunneling
- Ground improvement (grouting methods for ground improvement)
- Groundwater control
- Obstructions and mixed face tunneling
- Case histories
Tunnel Planning and Minimization of Risk
- Investigation and pre planning Method and equipment selection
- Performance envelopes for various tunnel methods (settlement/alignment noise etc)
- Specification preparation for tunneling
- Contract document preparation for tunneling
- Risk mitigation and management techniques for tunneling
- Tunnel construction management, inspection, monitoring and control
- Tunnel and microtunnel cost influences and costs levels
Tunnel Management and Safety
- Tunnel design management and safety
- Tunnel and shaft operation safety
- QA/QC for tunneling
New Developments, Trends and Techniques
- Investigation techniques (prior to and during tunneling)
- Hard rock tunneling
- Soft ground tunneling
- Pipe jacking and microtunneling
- Pipe roofing techniques
- Jacked Boxes
- A bibliography of suggested books, manuals and trade journal reading
How to Earn your PDHs and Receive Your Certificate of Completion
To receive your certificate of completion, you will need to complete a short on-line post-test and receive a passing score of 70% or higher within 1 year of purchasing the course.