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The Mersey Gateway Project in the UK, as one of the largest infrastructure projects in the UK in recent years, is of self-evident importance. This project not only connects important transportation nodes but also plays a crucial role in promoting regional economic development and improving the quality of life of the people. Eptisa, as an important participant in the project, is responsible for the geotechnical engineering and drainage design of the entire project (covering the main bridge and various types of retaining walls) and provides comprehensive support for the construction technology.