Registration for NZSEE 2022 Webinar Series #5 – Seismic Design of underground structures is now live.

NZSEE, NZGS and the NZ Tunnelling Society are pleased to invite you to the next instalment in the NZSEE 2022 Webinar series on –  “Seismic Design of underground structures” . Dr Andy Dodds will be presenting on “Seismic shaft design for the Central Interceptor project” and Wataru Okada will be presenting on ”Seismic design aspects of the City Rail Link tunnels”. This webinar will be a live-streamed in-person seminar at BECA in Auckland on Wednesday 23rd November from 5pm-7pm. Those attending this event in person are invited to join from 5pm for refreshments and networking, ahead of the seminar at 6pm. Those attending online are invited to join from 6pm when the live stream will begin.

Duration: 1 HR

Presenter: Dr Andy Dodds and Wataru Okada

Location: BECA Auckland (limited numbers)

Cost: Free

To register click here –



Presentation Title:  “Seismic shaft design for the Central Interceptor project” presented by Dr Andy Dodds

Abstract:  The Central Interceptor (CI) project includes large (up to 12m) diameter and deep (up to 80m below ground surface) circular shafts extending through Auckland geology that includes basalt, Tauranga Group (TG) alluvium soil and East Coast Bays Formation (ECBF) residual soil and soft rock. Seismic shaft design is discussed following the deformation-based pseudo-static approach as applied to Auckland seismicity and ground conditions. Included is commentary on some soil-structure interaction challenges associated with the presence of basalt and an internal cross-wall.

Bio:  Dr Andy Dodds (NZCE – PhD, CPEng, PE/GE California) is an Associate Principal in Arup’s Auckland Office serving as Geotechnical Leader for Arup New Zealand and Arup’s Ground Engineering Skills Network Leader for the Australasia Region.  With over 28 years of experience in geotechnical, earthquake and civil engineering gained both in New Zealand and around the world, Andy applies this experience in leading and managing projects and teams.

Presentation Title: “Seismic design aspects of the City Rail Link tunnels” presented by Wataru Okada

Abstract: The City Rail Link (CRL) Project is a 3.45km twin-tunnel underground rail link allows the Auckland rail network to at least double rail capacity. The C3 Contract comprises two new underground stations, two redeveloped stations, twin bored running tunnels and two mined junction caverns.  The seismic design of the tunnel structures is presented, including geological features along the tunnel alignment, challenges associated with ground conditions, key design considerations and criteria.

Bio: Wataru Okada is a Technical Principal in WSP Auckland Office.  He has 25 years’ experience in design and construction of large civil infrastructure and underground works in New Zealand, Australia, Japan and Singapore.  Wataru has worked on the City Rail Link C3 Contract as the Tunnel Discipline Lead and CPS Lead over the last 5 years.  Wataru completed his undergraduate degree and Masters degree project in earthquake engineering at the University of Canterbury.  Earlier in his career, Wataru worked as a site engineer on the Tokyo Metro Oedo Line and Singapore MRT North East Line.  Since 2000, Wataru has been working on a wide range of infrastructure projects in NZ and abroad in the consulting environment.  His recent project involvement includes the Waterview Connection, City Rail Link C2, C3 and C6 Contracts and iRex Ferry Terminal Upgrade.

Registering will provide you with login details for the webinar. If you wish to attend the live seminar, please indicate with your registration.

As this topic has far broader relevance than just engineering professionals, we do encourage members to further distribute this registration invitation to others in the industry who may have an interest in attending this webinar. Preference will be given to NZSEE members if places are oversubscribed.