Sharq Crossing

Project Description

Conceived by world renowned Architect and Engineer Santiago Calatrava on behalf of the State of Qatar’s Public Works Authority Ashghal, the unique 21st century bridge-tunnel connection across Doha Bay comprises three bridges, two immersed tunnels with a total length of approx. 6 km and three cut-and-cover tunnels.

Tunnel Engineering Consultants (TEC) worked for lead consultant Santiago Calatrava Engineers on the validation of the original concept design of five tunnels that are part of Qatar’s new landmark Sharq Crossing.

This is one of the most iconic and prestigious bridge-tunnel connections TEC has been commissioned to work on to date, and the first ever immersed tunnel project in the Middle East region. Of particular interest is the Marine Interchange as a complex underground interchange, connecting the two immersed tunnels and the West Bay bridge. Also, the West Bay bridge will have the world’s largest arch span connecting the shore with the Marine Interchange.

The approx. 12 km bridge-tunnel connection Sharq Crossing is a vital part of the Greater Doha Transportation Master Plan. In recent years the city of Doha has seen considerable increase in population, car ownership and new city districts. It is forecast that the area will experience serious traffic problems in the near future.

The project was supposed to be completed in 2020, at which point the Sharq Crossing would link the new Hamad International Airport with Doha’s city centre and new city and business districts. It would also help Qatar receive all visitors to the 2022 FIFA World Cup events. Unfortunately, the project was put on hold in 2015.

Scope of Works

TEC prepared the validated Concept Design (preliminary design level) of the two immersed tunnels of 3.1 and 2.8 km, the three cut-and-cover tunnels with a length of approx. 950-1250 m each connecting the bridges to the mainland and the Marine Interchange of approx. 600 m, connecting the two immersed tunnels and one of the bridges.

The assignment also included the design of bridge foundations, roads, utilities, mechanical, electrical and plumbing (MEP) systems, the integral safety concept including ventilation and the preparation of a construction schedule and budget.

TEC worked together with HBI Haerter Ltd. (Zurich, Switzerland) for safety and tunnel ventilation and Geotechnical Consulting Group (GCG; London, UK) for geotechnical expertise.

The sub consultancy agreement covered the first project phase: Concept Design Validation, in which the design was actually developed close to a preliminary design level. TEC has executed the first phase in 5 months’ time, which started in September 2013 and was completed by January 2014.

In addition, and after the Concept Design Validation stage, TEC undertook advanced studies for the preparation of the construction tenders and involving geotechnical, seismic, hydrographical and airport studies.

Specification sheet 2 page(s) - 291 kB


Calatrava Mideast LLC

In co-operation with

HBI Haerter Ltd., Zurich (CH) and Geotechnical Consulting Group (GCG), London (UK)

Type of project

Immersed Tunnels





Project duration


Project phase

Concept / preliminary design

Construction cost

Not disclosed

Consultancy fee

Approx. € 16 million