Immersion Equipment

TWD specializes in the design and engineering of immersion equipment, ensuring the seamless transport and installation of massive marine structures such as immersed tunnels and caissons. Our expertise spans method engineering, mission equipment development, and on-site operational support.

For safe and efficient project execution in challenging marine environments, precision is key. From bollard strength verification to winch and fairlead placement, we ensure all components meet the highest standards of safety and functionality. Additionally, our detailed installation storyboards provide clear guidance throughout the construction process, minimizing risks and delays. With decades of experience in marine civil markets, we bring reliability and innovation to every stage, ensuring your project is executed with precision and efficiency.

Method Engineering

Our method engineering services emphasize detailed planning to address site-specific challenges for underwater structures. We account for logistical complexities, including site layout, weather considerations, and environmental factors to ensure optimal workability and operability during transportation and installation. Additionally, we conduct thorough dynamic studies, mooring analyses, and stability calculations to streamline operations, enhance safety, and maximize efficiency throughout the project duration.

Mission Equipment

TWD designs and delivers specialized mission equipment essential for immersion projects. From tunnel end caps and lifting frames to caisson support structures and skidding systems, we develop innovative solutions to facilitate the smooth handling and installation of large-scale marine components. Our engineering expertise ensures that temporary equipment, such as mooring bollards, pump frames, and boat landings, meets the highest standards of safety and functionality.

Transport and Installation

The transportation and installation of marine infrastructure segments present unique challenges that require meticulous planning and execution. Our team provides end-to-end support, from vessel selection and reinforcement design to offshore transport optimization and seafastening solutions. Whether dealing with a single structure or large-scale deployments, we ensure precise execution through engineering assessments and project-specific logistics strategies.

On-site Assistance

Our on-site services include marine operations management, mooring assistance, and ballasting support. We provide operational oversight, warranty surveys, and hands-on assistance to guarantee compliance with safety regulations and industry best practices. With our dedicated expertise, we help clients navigate complex marine construction challenges with confidence and efficiency.

Fabrication Services

Throughout the fabrication phase, our tailored assistance addresses production hurdles to ensure smooth progress. Proactively addressing potential issues allows us to resolve them before the operational phase, saving valuable time and resources. Close cooperation and communication between the fabricator, client, and our expert engineers helps to accelerate the progress of the project.

Constructing something in the marine civil environment? Our custom-made temporary works help you overcome complex challenges. If you want to better understand the extent of TWD’s expertise, please read our Marine Civil Solutions Overview. In order to explore how we’ve contributed to industry-leading success in projects, featuring clients like VolkerStevin UK, BAM, SRGB, and more, you can download our Track Record.