“桥建合一”独柱大悬臂高架车站设计要点研究  

The Design of Elevated Station with Single Pillar and Long Cantilever Which Serving as a Combination Structure of Station and Bridge

作　　者：廖宇飚 Liao Yubiao(China Railway Engineering Design and Consulting Group Co.,Ltd.,Beijing 100055,China)

机构地区：[1]中铁工程设计咨询集团有限公司,北京100055

出　　处：《铁道勘察》2021年第5期120-124,共5页Railway Investigation and Surveying

基　　金：中铁工程设计咨询集团有限公司科技开发计划课题(单轨-业2020-7)。

摘　　要：针对跨座式轨道交通领域中的“桥建合一”独柱大悬臂高架车站结构抗震冗余度低,涉及铁路、城市轨道交通两个领域的建筑、结构、桥梁等多个专业,目前缺乏统一的设计标准等问题,以多个工程实例为背景,采用有限元计算对比分析的方法,对该结构体系的特点及材料选择、设计标准和抗震设计方法、基础模拟方式、盖梁的次弯矩和扭矩、钢屋盖对整体结构影响等5个设计要点进行研究。研究表明:(1)在抗震设防烈度7度以上的高烈度地区,采用钢-混组合结构可获得更优的性价比;(2)从结构的安全可靠出发,计算模型中基础模拟宜考虑桩土相互作用的影响,并采用较“小震弹性”要求更高的抗震性能化设计;(3)钢屋盖对整体计算结果有较大影响,悬挑盖梁根部的次弯矩和扭矩影响不容忽视。For the elevated station with single pillar and long cantilever which serves as a combination structure for both station and bridge,there are problems including low seismic redundancy,involving in numerous majors in terms of railway and urban metro,a lack of uniform design standards.Based on several engineering projects,this paper adopted the method of finite element calculation and comparative analysis to study five design points including the characteristics of the structural system,the selection of materials,the design standards,the selection of foundation simulation methods,the secondary bending moment and torque of the cover beam,and the influence of steel roof on the whole structure.Study shows that:(1)in the highly seismic area with seismic fortification intensity of more than 7 and a half degrees,the steel-concrete composite structure can obtain a better value of money;(2)based on the safety and reliability of the structure,the influence of pile-soil interaction should be considered in the simulation of the foundation.The performance-based aseismic design with higher requirements than small earthquake elasticity should be adopted in aseismic design;(3)the steel roof has a great influence on the overall calculation results,and the secondary bending moment and torque at the root of the cantilevered beam cannot be ignored.

关 键 词：跨座式轨道交通 独柱大悬臂高架车站 桥建合一 抗震设计 设计要点 

分 类 号：U213.14[交通运输工程—道路与铁道工程] U232