In order to ensure that the overall prefabricated underwater push-out final joint can control the safety risk during construction process under offshore conditions,and to meet the design requirements of centimeter-level installation and docking accuracy,this paper explores the issue of the closure width in the final joint construction of steel shell immersed tunnels.By analyzing the actual construction parameters of the installed pipes and the specific weather window conditions,this paper focuses on the entry method of the pipe into the closure,the longitudinal positioning ability of the pipe,and the cumulative length errors of the tunnel prefabrication and installation.The results show that controlling the closure width of the final joint at 2.2 m is beneficial for providing space for post-welding operations,enhancing ventilation effects,satisfying large-scale welding operation conditions,facilitating the deployment of large-scale equipment,and improving work efficiency.Meanwhile,it provides an effective space for sinking and docking operations in the construction of immersed pipes,reducing operational risks.This study is of great significance to provide useful references for the final joint construction of steel shell immersed pipes.
关键词
沉管隧道/预制推出式最终接头/龙口富裕宽度/沉放控制/定位能力
Key words
immersed tunnel/prefabricated push-out final joint/surplus width of closure/sinking control/positioning ability
维普
万方数据