TUCSS Monthly Seminar No. 234

Event details

TUCSS Monthly Seminar No. 234 – Thursday, 19 May 2022, 6.30 pm

Design and construction challenges with tunnelling at speed: TBM tunnels for Brisbane Airport Link

by Dr Anthony Harding, Global Solutions Leader – Tunnels, Jacobs International Consultants

Abstract

The 5.8km of road tunnels for Brisbane Airport Link had only four years from contract signing to opening to traffic. This meant that the twin 2 km, 11.34 internal diameter TBM tunnels had to be designed and constructed within 3 years to allow for tunnel fit-out and commissioning. As this time frame included the cross passages, road deck and smoke duct, it was imperative that the construction of these elements was constructed as closely as possible behind the TBM without impacting tunnel productivity.

In this presentation, Anthony Harding, who was the TBM Tunnels Design Technical Lead for the TBM tunnels, describes the challenges arising from this tight timescale and how the design and construction teams worked together to develop solutions that were constructible and economical, including:

• The world's largest Steel Fibre Reinforced segmental lining, designed for soil and rock conditions with the tunnel crown up to 40m deep
• Invert structures constructed using a gantry crane in the TBM backup
• Cross passage opening supports build into the segmental lining at the TBM
• A very thin insitu concrete smoke duct structure hung from the crown of the tunnel
• How the design solution ensured that the cross passages, road deck and smoke duct could be constructed without impacting each other
• A cavern traverse that excavated the lower quarter of the TBM profile

Speaker

Professional Engineer and Chartered engineer with 21 years experience in station design and large diameter tunnels responsible for asia pacific region within Jacobs. Specialised in design leadership, TBM tunnelling including temporary works and cross passage construction, segmental linings for TBM tunnels and deep excavation for underground railway stations, cut and cover tunnels. Global technology leader for tunnel engineering responsible for promoting and coordinating the development of technical excellence and new technologies for Jacobs. 

Time and Place

The presentation will take place electronically on Thursday, 19 May 2022 at 18:30 hrs. The presentation will take approximately 45 minutes, follow by 15 minutes of questions/discussion.

Invitation

This is the 234^th in a series of presentations by TUCSS and is open to current TUCSS Members only. Seats are on first-come-first-served basis and limited to 500 persons.

Registration

Members are to sign up for the seminar via their TUCSS account on the TUCSS Website or TUCSS Mobile App. The details on how to access the seminar will be sent to the members who has successfully signed up for the seminar, at a date nearer to the seminar. The deadline for registration is on Monday, 9 May 2022 or when total registered participants reaches 500 whichever comes earlier.

*TUCSS Corporate Members limited to 5 registrations only. For TUCSS Corporate members, please email us the following email information (name, TUCSS Corporate membership number, company name, email address, PE/RE/RTO number if applicable)

Attendance Policy

For members who require certificate of attendance, please note of the attendance policy:

-       Login at the beginning of the seminar (link will be assessable at 18:15 hours)

-       Evidence of participation by video switched on throughout the seminar

-       Complete the quiz at the end of the seminar before logging out. The duration for the quiz is 15mins.

Certificate of Attendance will be uploaded to the member’s account after the compliance to the Attendance Policy is verified.

PDU/STU

Points have been applied and pending approval.

NOTE TO MEMBERS

Note 1: Members are not required to indicate their names and TUCSS registration details through Chat function. Members shall not send messages through Chat function during the presentation.

Note 2: Higher no-show was observed at the last TUCSS monthly seminar. As there are limited openings for the seminar, members are urged to register for the seminar only if they can attend the seminar.

Note 3: For any suggestions/feedback to improve the online seminar, members are to email to the secretariat.

Thank you.