Exploring advancements in tunnel drainage design and construction through international case studies from Australia, Hong Kong, and the UK.

Overview

This session explores the evolution of tunnel drainage systems over the past twenty-five years, focusing on modern approaches that improve drainage efficiency, durability, and constructability. Participants will gain insights into how design innovations and material advancements have addressed common challenges such as precipitate deposition, maintenance access, and cost efficiency. Drawing on case studies from major projects in Australia, Hong Kong, and the United Kingdom, the presentation will highlight lessons learned and best practices in developing reliable and sustainable tunnel drainage solutions. Attendees will also learn about the performance outcomes achieved through alternative drainage layer designs and construction methods.

Learning Outcomes

By attending this session, participants will:

1. Develop an understanding of innovative approaches to tunnel drainage design and how these differ from traditional methods.

2. Learn from international case studies illustrating successful implementation and long-term performance.

3. Understand key design and construction considerations, including practical dos and don’ts derived from field experience.

Speakers

Richard Clarke

Sector Manager – Rail and Tunnels, ABG

Richard spent the first thirty years of his professional career working for several consultants and operators designing, building and operating UK landfill sites. He gained experience of using a variety of geosynthetic and geocomposite products in addition to boulder clay, marl, coal shale and bentonite-enhanced sand primary liners. He later transferred into brownfield remediation overseeing the construction and testing of earthworks, piling mats and crane pads before a move across to ABG where his practical experience is being brought to bear as Sector Manager for both Tunnels (worldwide) and Rail (UK).

Goran Erak

Director of Civil Engineering, ABG Geosynthetics

Goran is a civil engineer with 33 years of experience in the UK, Europe, Africa and Middle East, working on a number of challenging projects within a variety of sectors, including environmental, tunnels, highways, rail, water, mining, structural and residential. He’s responsible for the ABG Geosynthetics Civils division globally, including monitoring design output for specific projects in this sector and dealing with civil engineering consultancies, contractors, government organisations and coordinating research projects with universities. He is also responsible for providing specialist geosynthetic design solutions on unusual or difficult civil engineering Applications as well as managing research and development projects for advanced geosynthetic applications.