Tunnels & Bridges

TWD develops the required temporary works to make your construction method a reality. We are experts in developing competitive construction methodologies for bridges and tunnels, demonstrated through our project portfolio in marine civil markets.

Fom subsea tunnel immersion to precision bridge assembly, our main goal is to achieve precise and safe construction in the simplest way possible. By utilizing method engineering and expert project management, we aim to optimize your tunnel and bridge projects for both time and cost efficiency. Whether we apply our expertise in geotechnical assessments, cofferdam design, systems such as launching girders and cantilever bridges, or much simpler solutions – all will always be tailored to meet the unique needs of your project.

Tunnels

Our expertise in this area has mostly been applied to immersed tunnel construction. Such projects present significant engineering challenges, including managing geotechnical variability and maintaining structural integrity under water pressure. Key factors such as buoyancy control, stability, and precise segment placement are crucial, especially when environmental conditions like currents and tides come into play. TWD applies advanced marine and dynamic analysis tools to streamline the installation of immersed tunnels.

Our Expertise:

Mooring, towing, and ballast optimization for controlled immersion
Cofferdam design for temporary dry zones during installation
Subsea lifting tool design for precise segment handling
Barge stability and seafastening designs for secure transport
Dynamic analyses to predict tunnel segment behavior during installation

Bridges

Building bridges presents a range of engineering challenges. From the initial design phase to the final installation, key considerations include ensuring stability during lifting operations, managing environmental influences, and achieving precise alignment under varying conditions.

TWD excels in providing tailored solutions for bridge construction, offering expertise in designing innovative equipment and methods to address these challenges. Our extensive experience includes the use of launching girders for precise segment placement, as well as the installation of suspension bridges using floating barges. Additionally, TWD has developed specialized systems for safely tightening and releasing cables on cable-stayed bridges, ensuring their long-term stability and performance.

We also design temporary supports and constraining systems to renovate steel bridge deck elements. Our creative, lightweight, and compact designs meet high stiffness requirements while ensuring minimal disruption to traffic. This holistic approach allows us to tackle complex projects efficiently and safely, providing our clients with reliable and innovative solutions.

Our Experise

Design and optimization of cofferdams for controlled work environments
Launching girder design for precise bridge segment placement
Cantilever bridge systems for efficient construction in near-shore conditions
Installation of suspension bridges using floating barges
Specialized systems for cable-stayed bridge maintenance
Lifting analyses and design of customized lifting frames
Gantry crane solutions tailored for specific project needs

Are you constructing something in the marine civil environment? Our custom-made temporary works help you overcome complex project challenges. From logical lifting solutions to future-proof tools, download our Track Record to learn how we can help streamline your marine civil operations. If you want to understand the extent of TWD’s expertise better, please read our Marine Civil Solutions Overview.