京张高铁清河站结构设计

Structural design of Qinghe Station of Beijing-Zhangjiakou high-speed railway

京张高铁清河站采用建桥合一结构体系,有两条国铁正线通过。A区主站房为复杂高层组合结构,地下结构无缝超长,长度为660m;站厅层采用钢框架结构,屋盖结构采用焊接H型钢桁架结构,屋面最大跨度84m,最大悬挑18m,由巨型A柱、Y柱、直柱混合支承。B,C区地铁区间上方为地下车库,存在托柱转换。京张高铁清河站结构设计的难点较多,为此开展了多项研究:如建桥合一结构体系的抗震性能研究,考虑土-结构共同作用的地下结构的抗震分析,A区结构的风荷载取值研究,大跨屋盖采用A柱、Y柱、直柱混合支承结构的抗连续倒塌性能研究,高铁候车厅的楼面振动舒适度研究,重要节点的补充分析,绿建设计及结构健康监测系统设计,通过各项研究论证了结构的安全性、合理性、经济性。

Qinghe Station of Beijing-Zhangjiakou high-speed railway adopts the structural system of building-bridge integration,and has two main national railway lines passing through.The main station building in area A is a complex high-rise composite structure with seamless and super long underground structure of 660 meters.The station hall floor adopts steel frame structure,and the roof structure adopts welded H-shaped steel truss structure.The maximum roof span is 84 meters and the maximum overhanging is 18 meters,which is supported by a mixture of A column,Y column and straight column.The underground garage is located above the subway section of area B and area C,with support column conversion.There are many difficulties in structural design of Qinghe station of Beijing-Zhangjiakou high-speed railway,so many researches had been carried out,such as the research on seismic performance for system of building-bridge integration,the seismic analysis of underground structure considering soil structure interaction,the wind load value for structure of area A,the progressive collapse resistance of long-span roof structure supported by a mixture of A column,Y column and straight column,the floor vibration comfort of high-speed railway waiting hall,and the supplementary analysis of important joints.The green building design and structural health monitoring system design were introduced too.The safety,rationality and economic usefulness of the structure are demonstrated through various design studies.