The construction of immersed tunnel is characterized by high precision requirements for the installation of pipe segments.The installation accuracy of pipe segments often depends on the accuracy of laying the gravel bed.The curve radius of pipe segments of Dalian Bay immersed tunnel is small and the curvature is large,so the traditional gravel ridge arrangement is not suitable for the installation of curved section pipe segments.In this paper,the key contents such as the length of the gravel ridge,the arrangement of the ridge body,and the position of the ship were studied,so as to successfully complete the leveling construction of the curved section of the gravel bed,and meet the requirements of the installation and docking of immersed pipes.
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