杭州萧山国际机场三期工程陆侧交通中心及上盖结构设计

Structural design of landside traffic center and upper cover ofⅢproject of Hangzhou Xiaoshan International Airport

陆侧交通中心是联系杭州萧山国际机场T1~T4各航站楼的中转站,是杭州萧山国际机场三期工程的核心部分。为满足杭州萧山国际机场工程建设要求及东侧使用中航站楼“不停航、不停运”要求,陆侧交通中心东侧C区采用逆作施工,为目前浙江省内规模最大、开挖深度最深的采用逆作法的基坑工程。根据本工程的工程概况和环境特点,对本项目基坑逆作法设计的重难点进行了分析。从逆作法剖面设计、楼层板设计、栈桥设计和节点设计4个方面对本工程的逆作法设计中面临的主要问题进行了梳理和总结,并对相应问题所采取的措施进行了介绍。最终的工程实施效果及监测数据表明,整个逆作施工过程安全可控,基坑开挖对周边环境影响在合理范围内。

Landside traffic center is a transfer station connecting T1~T4 terminals of Hangzhou Xiaoshan International Airport and the core part of phaseⅢproject of Hangzhou Xiaoshan International Airport.The landside traffic center and the upper cover structure system were introduced,and the design parameters and seismic performance targets according to the project characteristics and specifications were reasonably selected.The basement roof was determined as the embedded end by the comparative analysis method,which makes the structure force transfer system simple and clear.The dynamic characteristics of the structure were analyzed by YJK software.The stress characteristics of diamond grid shell steel roof and daylighting roof were studied by using the solid finite element method,and the temperature effect of the upper multi tower super-long structure was analyzed.The analysis results show that the structural layout,member design parameters and performance targets are economical and reasonable.In addition,the elastoplastic time history analysis results show that the seismic performance of the structure is good under the rare earthquake.