NATWeek

Golder is proud to be a part of NATWeek – a virtual event showcasing select NAT 2020 (North American Tunneling) conference content! Online technical sessions will be presented by leading global tunneling innovators.

Golder’s Technical Presentation:

Jacked Pre-Cast Segmental Shaft Construction Methodologies

Thursday, June 11 – Technology Track

Pre-cast segmental construction can deliver water-tight, rationalized shaft structures through soft rock and non-cohesive and cohesive soils. It can minimize the need for wet process applications on-site and assist in reducing site waste streams due to its’ predominantly pre-cast system components. The presentation will provide an overview of the jacked segmental shaft methodology and its application to varying ground conditions. Paired with under-pinning and under-reaming techniques, corbeled segments, shotcrete (or sprayed concrete) linings and concreting under-water, this is a safe, versatile, quick construction methodology that can be designed for near-surface infrastructure up to 70m deep.

Joe Anderson, P.Eng., is a Structural/ Tunnel Engineer, with 10 years of experience in the mining and civil tunneling industries. He has been involved in the design and construction of multiple shaft and tunnel projects in both competent and unstable ground across the United Kingdom and North America, using NATM/SEM techniques and steel, cast iron and composite lining systems.

Ben Ablett, M.Eng, is an Principal Design Engineer with 19 years structural design experience specialising in underground temporary and permanent structures.  He serves as technical lead on Golder’s UK Civil design team.

John Elliott, B.Sc., is a Principal and Shafts and Tunnels Group Leader, and has specialized in the design and construction of technically challenging underground projects for 40 years.

Golder papers in the conference proceedings will also include:

Setting Face Pressures for Settlement Control During EPB and Slurry Tunneling

Face pressure control of EPB or slurry tunnel boring machines must be selected to avoid surface heave, large ground losses, maximize productivity and comply with ever more stringent surface settlement or volume loss criteria. Engineers commonly use simple empirical methods relating the ground surface settlement trough unit volume to tunnel unit volume, even for high risk projects, without considering root causes of volume loss at tunnel level. This paper summarizes methods for setting target face pressures for settlement control, reasons for and consequences of inadequate target pressures, identifies needs for future research and illustrates these issues with several case histories.

Storer Boone, Ph.D., P.E., is a Principal and Geotechnical Group Leader with more than 30 years of tunneling experience, in the US, Canada and elsewhere around the world. His research, design, construction and forensic work has focused on soft-ground tunneling and deep excavations, risk analysis and subsurface risk management.

Nick Shirlaw, P.Eng. is a Senior Consultant with more than 45 years of experience. He is currently working on tunneling projects in Hong Kong, Singapore, Australia, New Zealand and India.

Stephen Barrett, CPEng, is a Principal and Global Leader of the Underground Infrastructure Group with over 27 years of international experience working as a tunneling specialist. He has a broad background in geotechnical engineering, rock mechanics, groundwater assessments and tunnel design.

How Do You Eat an Elephant? …One Small Bite at A Time

Upgrading one of London’s oldest, busiest inter-modal stations to allow for step-free access required complex works methodologies and innovative design solutions – comparable to an inverted, safety-critical game of Jenga. Lift shafts were constructed through overground rail platforms and between newly exposed underground platform tunnels, while the station remained in full operation. Legacy assets were maintained while adapted and modified for modern use, providing greater capacity, connectivity, accessibility, and an improved passenger experience.

Ben Ablett, M.Eng, is an Principal Design Engineer with 19 years structural design experience specialising in underground temporary and permanent structures.  He serves as technical lead on Golder’s UK Civil design team.

John Elliott, B.Sc., is a Principal and Shafts and Tunnels Group Leader, and has specialized in the design and construction of technically challenging underground projects for 40 years.

Ed Gillard, CEng MICE, is a Senior Structural Engineer with eight years of experience in the structural design of underground support systems and sequencing.

Date

Jun 08 2020 - Jun 12 2020
Expired!

Time

All Day

Labels

Not Featured

Location

Online

Organizer

Kendra Mulhern
Email
Kendra_Mulhern@golder.com

Golder uses cookies to ensure that we give you the best experience on our website. By continuing to use this website, we assume that you consent to receive all cookies on our website.

OK Learn More