Technical Expertise

Multidisciplinary teams comprising of specialists across ten industry sectors, we have the expertise necessary to grapple with challenging assignments.

VIEW ALL SECTORS >

Sectors

Commitment to Clients

Our business is built on relationships, and our clients will always be our top priority.

View all Projects >

Featured Project

Silvertown Tunnel London UK

Silvertown Tunnel
One of the largest engineering projects in the world.

learn more >

Who We Are

International Award-Winning Engineering Consultants who deliver ground breaking solutions at the forefront of industry best practice.

learn more >

Our Regions

Carbon Reduction Plan

About - office locations image

Our Commitment to Net Zero
ByrneLooby is committed to becoming a net zero engineering consultancy by 2040

learn more >

Stay Up-to-date

Stay on top of the latest developments, appointments, awards and more across all our offices.

View all News >

Featured News

Editors Award 1

ByrneLooby wins Editors Award For Wadhurst Cutting London End in GE Awards 2022

The 2022 GE Awards were announced on Tuesday 6 September 2022 at the Grosvenor House Hotel, London. 

LEARN MORE >

Investing In Our People

Cultivating a culture in which individual differences and the contributions of our staff are recognised and valued.

meet our people >

Our EDI Policy

Careers - Image

Celebrating People
Fostering a culture where you are encouraged to be yourself.

learn more >

International Presence

Multidisciplinary team comprising of specialists across Ireland, UK and the Middle East.

Follow us:

Contact Us

We would love to hear from you. Please fill in the quick contact form below.

Send a message

Stepney Green, Crossrail

Stepney Green, Crossrail

The new Crossrail line in London divides at Stepney Green, with one line continuing north and one line crossing the Thames to the south. A deep shaft and large mined cavern was required at this location as TBM reception and launch and to accommodate the converging tunnels. The shaft was constructed using deep diaphragm walling techniques. The tunnel cross-passages are some of the largest ever constructed using sprayed concrete lining, being 50m long, 17m wide and 15m high.

Stepney Green, Crossrail

Diaphragm Wall

ByrneLooby was initially appointed by the specialist contractor Spie to design and detail the diaphragm wall. This wall facilitated the enormous 35m deep excavation, with the wall panels being 1.2m thick and 50m deep. A particular challenge was the detailing of the reinforcement for the wall panels, ensuring these large cages could be safely lifted from horizontal to vertical for placement into the excavation. Each cage weighed 25 tonnes necessitating a robust temporary works design.

Diaphragm Wall

Expertise

Subsequently, the main contractor Dragados-Sisk JV appointed ByrneLooby to design the temporary propping to facilitate excavation of the shaft. We worked collaboratively with Dragados-Sisk to devise the value engineered construction methodology and sequencing and internal support system in order to accelerate the construction program and improve buildability. ByrneLooby also provided guidance on the cross-passage excavation stability and the sprayed concrete lining solution.

Expertise