Bao'an Avenue Middle Approach Road Interchange Municipal Project, located in Fuyong Street, Bao 'an District, is a large underground tunnel structure, with complex engineering, high technic and difficult construction. It is the control project of the progress of the whole Bao' an Avenue. The main structures are: underground continuous wall, U-shaped groove, prestressed hollow plate beam, underground channel, pump room, drainage box culvert, retaining wall, etc. With rich construction experience and scientific management. In the past two years, the group's professional and technical personnel were conscientious and not afraid of arduous, successfully completed the task. No matter the safety work, project progress or quality and other aspects have been affirmed and praised by all levels of leadership.