If there is one thing that defines Ineco, it is the ability to adapt to changes and propose solutions to face future scenarios, a trait embedded in our teams. More than 4,000 professionals bring their solid experience, knowledge and innovative spirit to progress towards models in line with the times, where sustainability and digitalisation are the cornerstones on which our company’s strategy is built on.

As a result, digitalisation and the application of new technologies make it possible to improve the inspection and monitoring processes for infrastructure and bridges, making progress in models for which Ineco has more than three decades of experience. An example is the innovation project developed by the company which makes use of drones and has been successfully tested for the radio aid calibration system.

The extensive experience, as well as the avant-garde and entrepreneurial spirit of the company’s professionals, allow Ineco, together with other companies in our country, to integrate Spanish engineering talent into projects that are revolutionising mobility around the world

The extensive experience, as well as the avant-garde and entrepreneurial spirit of the company’s professionals, allow Ineco, together with other companies in our country, to integrate Spanish engineering talent into projects that are revolutionising mobility around the world. In this edition, we highlight our participation in the execution of the new tunnel under the river Thames in London, in the implementation of the ERTMS system in the Danish railway network, and in the administrative, environmental and legal management of roads upgrading program promoted by Costa Rica. All these actions are aimed at improving sustainability, safety and mobile connectivity, which translates into benefits for citizens. We noted improvements in the user experience, such as that provided by the Automatic Baggage Handling System (SATE), designed by Ineco at airports of Kastelli, in Greece and Schiphol, in Amsterdam.

The company’s Architecture with gender perspective team presents designs that are committed to inclusion. This is a pioneering project in the sector that seeks to integrate this aspect and guarantee full equality in the field of infrastructures and transport. An objective that is part of our 2030 Agenda Plan, that includes the use of engineering to support the most disadvantaged, across projects deployed in Africa, Asia and America which has allowed us to provide basic services and improve the quality of life of more than 44,000 people.

The new tunnel will be the first infrastructure to be built across the Thames since 1991, increasing public transport provision sixfold upon its commissioning. The project, which is being undertaken by London’s public transport authority Transport for London (TfL), is the largest road investment in this area of the city in the last 30 years. It includes the design and construction of 1.4 kilometres twin bored tunnels under the River Thames, which, together with the cut-and-cover tunnels at both ends, add up to a total tunnel length of 2 kilometres. The design also includes the necessary road works and junctions for tunnel access. With a budget of more than one billion pounds, the project has been awarded to the RiverLinx consortium, which is responsible for its design, execution, financing, operation and maintenance. RiverLinx is made up of Spanish operator Cintra, construction companies Ferrovial-Agroman and BAM Nuttal, engineering firms SK E&C, designers Ayesa, Arup, Cowi and financiers Aberdeen Standard Investment and Macquarie Capital. 

General layout of the route of the tunnel under the River Thames.

In turn, RiverLinx has contracted Ineco/RPS joint venture as an Independent Certifier throughout the design and construction process. As such, Ineco is participating in the construction of the tunnel, bringing its extensive experience in the supervision of particularly complex tunnels. The contract is being executed through a joint venture with the company RPS, in which Ineco has a 57% shareholding. Both companies will provide support as an Independent Certifier until the commissioning of the new tunnel. The design phase started in 2020, with work scheduled for completion in 2025. 

 Less traffic jams, better connections

Currently, the only means of crossing the Thames in this area of the city is the Blackwall Tunnel, which has been in service for over 120 years, with very high levels of congestion (over 48,000 vehicles per day in each direction) and gauge limitations. It is estimated that more than one million hours of congestion are generated each year due to tunnel capacity constraints, with an economic impact of 10 million pounds each year. 

Ineco is contributing its experience in the supervision of particularly complex tunnels

The new tunnel will be the first road crossing under the River Thames since the Queen Elizabeth II Bridge opened on the outskirts of London more than 30 years ago. It is estimated that the tunnel’s area of influence will see an increase in population of 650,000 people and the creation of 286,000 new jobs by 2036. Once operational, it will enable a six-fold increase in public transport capacity in this area of London. Today, due to the limitations of the tunnels, there is only one bus service that allows crossing between the two eastern neighbourhoods of the city. The new tunnel will have one bus lane in each direction, allowing an increase to 37 bus services per hour. All services will also be operated with zero-emission vehicles. 

TfL estimates that improving congestion in and around Blackwall will significantly reduce journey times. Studies predict that, without the Silvertown Tunnel, both traffic and emissions from congestion in the Blackwall Tunnel would increase in the coming years, such that morning rush hour delays in east and south-east London could increase by more than 20% on average. The new infrastructure will help to improve air quality in this area of the city by reducing congestion and increasing the flow of public transport, as well as making connections north and south of the river more resilient.

Description of the works

In addition to the tunnels, the works include the design of the accesses and the roads connecting them to the existing network, which are largely developed using open cut and cut-and-cover techniques by means of  slurry walls, sheet piling, micropiles and in-situ walls.

The tunnel is made up of two tubes built with an EPB TBM (Tunelling Boring Machine) of 12 m in diameter to accommodate a cross section with two unidirectional lanes of 3.50 m for each tube, with one of the lanes being exclusively for the circulation of buses, including double-deckers, and freight transport. 

The tunnel boring machine was manufactured in Germany by Herrenknecht. It is approximately 82 m long, weighs around 1,800 tonnes and will have a cutting surface of almost 12 m. 

The new tunnel will be the first road crossing under the River Thames for more than 30 years

Following the execution schedule, the tunnel boring machine will start boring the first tube (southbounds) from Silvertown, where the launch chamber is located, turn around in North Greenwich at the rotation chamber and continue boring the second tube back to Silvertown to the extraction shaft. The infrastructure will include seven cross passages connecting the tubes at 150 m spacing.

Overall, the construction team will manage a total excavation of 600,000 m³ and 100% of the extracted material will be transported by river, minimising the impact of construction traffic on neighbouring communities and roads.

The project also incorporates maintenance buildings and road works and surface links, including an overbridge and a pedestrian and cycling bridge. The works are expected to be completed in the first quarter of 2025 and will be located within the ultra-low emission zone.