Research on Deformation Characteristics and Design Optimization of Super-Large Cofferdam Enclosure Structure

With the rapid development of urban transportation facilities, their construction inevitably encounters unfavorable conditions, such as rivers and lakes. When using weir method to build facilities in lakes, design scheme for pit slope excavation inside cofferdam is related success or failure construction. In this study, excavations lakes discussed analyzed numerical simulation on-site monitoring against background Jinji Lake Tunnel. The findings are follows. (1) greater distance between cofferdam, smaller impact on is; when depth 10 m more than 47 m, deformation whole pile less 15 mm. (2) Under condition that platform width kept same, height ratio is, safety factor will be, under longer be. (3) far away from each other, different release schemes have effects stability. results research can provide references guidance similar projects.