钢壳沉管隧道最终接头龙口宽度研究  

Study on the closure width in the final joint construction of steel shell immersed tunnel

作　　者：王建 董辉 管泽旭 WANG Jian;DONG Hui;GUAN Ze-xu(CCCC First Harbor Engineering Co.,Ltd.,Tianjin 300461,China;No.2 Engineering Co.,Ltd.of CCCC First Harbor Engineering Co.,Ltd.,Qingdao,Shandong 266071,China)

机构地区：[1]中交第一航务工程局有限公司,天津300461 [2]中交一航局第二工程有限公司,山东青岛266071

出　　处：《中国港湾建设》2024年第5期68-72,共5页China Harbour Engineering

摘　　要：为了确保整体预制水下推出式最终接头在外海工况下施工过程安全风险可控,满足设计要求的厘米级安装对接精度,针对钢壳沉管隧道最终接头施工中的龙口宽度问题进行探讨。在分析已安管节实际施工参数和特定要求气象窗口条件下,从沉管进入龙口的方式、管节纵向定位能力及隧道预制、安装的累计长度误差等方面进行研究。研究结果表明,控制最终接头龙口宽度在2.2 m有利于提供后焊段作业空间,增强通风效果,满足大体量焊接作业条件,便于大型设备的投入,提高工作效率;同时,为沉管施工提供有效沉放对接作业空间,降低作业风险。本研究为钢壳沉管最终接头施工提供有益参考,具有重要意义。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 

分 类 号：U655.4[交通运输工程—港口、海岸及近海工程] U455.46[交通运输工程—船舶与海洋工程]