汽车荷载作用下军用梁铺盖体系冲击系数分析  

Analysis of Impact Coefficient of Military Beam Overlay System Under Vehicle Load

作　　者：贾文彪[1] 王晓华 胡长明[2] 杜逸璞 路乾 JIA Wenbiao;WANG Xiaohua;HU Changming;DU Yipu;LU Qian(China Railway First Bureau Construction and Installation Engineering Co.,Ltd.,Xi’an,Shaanxi 710054,China;Xi’an University of Architecture and Technology,Xi’an,Shaanxi 710055,China)

机构地区：[1]中铁一局建筑安装工程有限公司,陕西西安710054 [2]西安建筑科技大学,陕西西安710055

出　　处：《施工技术（中英文）》2021年第16期26-29,共4页Construction Technology

基　　金：国家自然科学基金(51408463);陕西省教育厅专项科研计划项目(17JK0424)。

摘　　要：以西安地铁6号线钟楼站为例,研究汽车荷载对半盖挖法中临时铺盖体系的影响,主要分析20m六四式军用梁在行车荷载下的自振频率和冲击系数。采用DASP采集仪对现场临时铺盖体系进行动态测试,得到其自振频率和冲击系数,并与现行使用规范进行对比。结果表明,为保证军用梁临时铺盖体系的安全性和稳定性,应选取军用梁使用手册求出的冲击系数和公路桥涵规范根据桥梁基频求出的冲击系数较大值作为稳定性分析的冲击系数指标。Taking the Zhonglou Station of Xi’an Metro Line 6 as an example, the impact of vehicle load on the temporary overlay system in the half-cover method is studied, and the natural frequency and impact coefficient of a 20 m 64-type military beam under vehicle load are analyzed. Adopting the DASP acquisition instrument to dynamically test the on-site temporary overlay system, and its natural frequency and impact coefficient are obtained, and compared with the current use specifications.The results show that in order to ensure the safety and stability of the military beam temporary overlay system, the larger value of the impact coefficient obtained from the military beam manual and the impact coefficient obtained from the highway bridge and culvert code according to the bridge fundamental frequency should be selected as the impact coefficient indicator of the stability analysis.

关 键 词：地铁 军用梁 冲击系数 汽车荷载 动态测试 

分 类 号：U445.72[建筑科学—桥梁与隧道工程]