城市轨道交通对西安永宁门古城墙振动影响研究
梁明晖1邹涛1钱春宇2张凯2
Influence of Urban Rail Transit on Xi’an Yongning Gate Ancient City Wall Vibration
LIANG MinghuiZOU TaoQIAN ChunyuZHANG Kai
-
作者信息:1.西安市轨道交通集团有限公司运营分公司， 710018， 西安
2.机械工业勘察设计研究院有限公司， 710043， 西安
-
Affiliation:Operation Branch of Xi’an Rail Transit Group Co., Ltd., 710018, Xi’an, China
-
关键词:
-
Key words:
-
DOI:10.16037/j.1007-869x.2023.07.017
-
中图分类号/CLCN:TB533+.2; X827
-
栏目/Col:研究报告
摘要:
目的：西安城墙是全国重点文物保护单位。日渐增强的路面交通振动和已开通运行的西安地铁2号线列车振动对西安城墙的安全性产生重要影响。因此，以西安永宁门城楼与城墙为研究对象，通过收集地铁不同运行速度对永宁门城楼与城墙造成振动的监测数据，分析其对永宁门城楼与城墙的影响。方法：监测得到现有路面交通引起的永宁门城楼与城墙重要控制点的振动响应；通过振动能量叠加计算方法，得出地铁不同运行速度+路面交通综合工况下的最大振动速度幅值并分析其影响规律；依据GB/T 50452—2008《古建筑防工业振动技术规范》容许的振动标准，分析、判定古建筑在各工况下的振动响应速度幅值是否满足相关要求。结果及结论：永宁门城墙本体结构及城楼木结构在单独路面交通工况、地铁运行+路面交通综合工况下，振动响应速度幅值均满足GB/T 50452—2008《古建筑防工业振动技术规范》容许振动标准要求和国家文物局建议值；对地铁运行+路面交通综合工况而言，降低地铁运行速度，永宁门城墙与城楼以及裂缝处各监测点的振动速度响应幅值变化程度均较小，故地铁降速对其影响有限；振动监测和叠加计算结果表明，路面交通对永宁门城墙的振动影响比地铁运营带来的振动影响大。
Abstracts:
Objective: Xi’an ancient city wall is a major historical and cultural site protected at the national level in China . The increasing vibration of road traffic and the operating Xi’an Metro Line 2 train has significant influence on the safety of Xi’an ancient city wall. Therefore, taking the Xi’an Yongning Gate (hereinafter represented by ′YG′) tower and wall as research object, by collecting the monitoring data of different metro operating speeds causing vibration of YG tower and wall, the influence of metro operating speed on YG tower and wall is analyzed. Method: The vibration response at important control points of YG tower and wall caused by existing road traffic is monitored. Through the calculation method of vibration energy superposition, the vibration peak velocity amplitude under different metro operating speeds + road traffic comprehensive working conditions is obtained, and its influence law is analyzed. According to the vibration standards in GB/T 50452—2008 Technical Specifications for Protection of Historic Buildings against Manmade Vibration, analysis and judgement is conducted on whether the vibration response velocity amplitude of ancient buildings under various working conditions can meet the relevant requirements.Result & Conclusion: The vibration response velocity amplitude of YG wall main structure and tower wooden structure under road traffic condition and metro + road traffic comprehensive conditions meet the allowed vibration standard requirements in GB/T 50452—2008 and the recommended value by National Cultural Heritage Administration; for the metro + road traffic comprehensive conditions, when metro operating speed is lowered, and the change of vibration velocity response amplitude at monitoring points on YG wall, tower and cracks is small, thus metro speed reduction has limited impact; the results of both vibration monitoring and superposition calculation show that the impact of road traffic on YG wall vibration is greater than that of metro.
- 上一篇: 高铁物流运输模式及其可行性
- 下一篇: 5G公专网支撑城市轨道交通“绿智融合”发展
过刊浏览
资料下载
友情链接