九度地震区高速铁路简支梁方案比选
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摘要
九度地震区地震烈度较高,一般情况下宜选择自重轻、重心低的结构形式,但未明确推荐简支梁的适用跨度。结合渝昆高铁及云南地区主要地质条件,着重讨论比较设计时速350 km/h高速铁路九度地震区24 m与32 m简支箱梁的比选。提出在满足桥梁抗震性能的条件下,比较简支梁跨度方案的经济指标来确定方案的合理性。结果表明:15 m墩高以下应选择使用实体墩,15 m及以上墩高建议选择空心墩;无论是在岩溶还是非岩溶地区32 m梁跨都比24 m梁跨具有经济优势,且桥墩越高越经济;渝昆线选用32 m梁跨比24 m梁跨可节省投资约122 58万元,推荐使用32 m简支梁。研究结果为九度地震区高速铁路简支梁方案比选提供了一种思路,可为类似工程设计提供参考。
The seismic intensity of the 9-degree seismic zone is relatively high. Under normal circumstances,it is better to choose a structural form with light weight and low center of gravity. However,the applicable span of simply supported beams is not explicitly recommended. The main geological conditions of the Yukun high-speed railway and Yunnan area were combined and focused on the comparative design speed of 350 km/h. The comparison of 24 m and 32 m simple box girder in the 9th seismic zone of the high-speed railway; it is proposed to compare the economic indicators of the simply supported beam span scheme to determine the rationality of the scheme under the condition of satisfying the seismic performance of the bridge. The results show as follows.(1) The physical pier should be selected below 15 m pier height,and the hollow piers should be recommended for pier heights of 15 m and above.(2) For both karst and non-Karst areas the beam with the span of 32 m has an economic advantage over that with the span of 24 m,and it is more economical for higher pier.(3) The 32 m beam span ratio of the 24 m beam span can save about 122. 58 million yuan,and the 32 m simple beam is recommended. The research results can provide reference for similar engineering design.
The seismic intensity of the 9-degree seismic zone is relatively high. Under normal circumstances,it is better to choose a structural form with light weight and low center of gravity. However,the applicable span of simply supported beams is not explicitly recommended. The main geological conditions of the Yukun high-speed railway and Yunnan area were combined and focused on the comparative design speed of 350 km/h. The comparison of 24 m and 32 m simple box girder in the 9th seismic zone of the high-speed railway; it is proposed to compare the economic indicators of the simply supported beam span scheme to determine the rationality of the scheme under the condition of satisfying the seismic performance of the bridge. The results show as follows.(1) The physical pier should be selected below 15 m pier height,and the hollow piers should be recommended for pier heights of 15 m and above.(2) For both karst and non-Karst areas the beam with the span of 32 m has an economic advantage over that with the span of 24 m,and it is more economical for higher pier.(3) The 32 m beam span ratio of the 24 m beam span can save about 122. 58 million yuan,and the 32 m simple beam is recommended. The research results can provide reference for similar engineering design.
引文
1白琦成.山区高速铁路桥梁设计几个问题探讨[J].铁道标准设计,2011(2):50-55Bai Qicheng.Discussion on several proble ms of high speed railway bridge design in mountain areas[J].Railway Standard Design,2011(2):50-55
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3刘翔.高速铁路无碴轨道施工关键技术和标准跨径桥梁动力特性研究[D].株洲:湖南工业大学,2011Liu Xiang.Study of the key technologies of high-speed ballastless track conseruction and dyna mic characteristics of the standard span bridge[D].Zhuzhou:Hunan University of Technology,2011
4刘勇,戴公连,康崇杰.中国高速铁路简支梁综述[J].铁道科学与工程学报,2015,12(2):242-249Liu Yong,Dai Gonglian,Kang Chongjie.Summary of simple supported beams of China high speed railway[J].Journal of Railway Science and Engineering,2015,12(2):242-249
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8王争鸣.西安至成都高速铁路设计创新技术综述[J].铁道标准设计,2018,1(1):1-6Wang Zhengming.A summary of innovative design technologies for Xi'an-Chengdu high speed railway[J].Railway Standard Design,2018,1(1):1-6
9中华人民共和国铁道部.铁路工程抗震设计规范:GB 50111-2006[S].北京:中国计划出版社,2009Ministry of Railway of the People's Republic of China.Code for seis mic design of railway engineering:GB 50111-2006[S].Beijing:China Planning Press,2009
10张永亮,陈兴冲,丁明波,等.多遇地震下少筋混凝土重力式桥墩验算指标研究[J].铁道工程学报,2014,31(11):72-76Zhang Yongliang,Chen Xingchong,Ding Mingbo,et al.Research on checking index of gravity pier with less reinforce ment concrete under frequent earthquakes[J].Journal of Railway Engineering,2014,31(11):72-76
11裴路.高速铁路混凝土重力式桥墩抗震验算方法研究[D].兰州:兰州交通大学,2014Pei Lu.Research on seismic checking method of concrete gravity pier of high-speed railway[D].Lanzhou:Lanzhou Jiaotong University,2014
12文望青,罗世东.京沪高速铁路桥梁设计关键技术[J].铁道建筑技术,2009(2):30-39,49Wen Wangqing,Luo Shidong.Key technologies for bridge design of beijing-shanghai high speed railway[J].Railway Construction Technology,2009(2):30-39,49
13崔丽红,魏庆朝.铁路桥梁方案比选的计算机模拟系统[J].铁道工程学报,2001(2):30-32,72Cui Lihong,Wei Qingchao.Computer simulation system for comparison and selection of railway bridge schemes[J].Journal of Railway Engineering,2001(2):30-32,72
14杜燕群.桥梁上部预制结构形式的方案比选[J].科学技术与工程,2009,9(11):3138-3140Du Yanqun.Comparison and selection of bridge prefabrication[J].Science Technology and Engineering,2009,9(11):3138-3140
2岳迎九.晋陕黄河特大桥主桥方案比选[D].成都:西南交通大学,2011Yue Yingjiu.Scheme comparison of Jin-Shaan Yellow River Bridge[D].Chengdu:Southwest Jiaotong University,2011
3刘翔.高速铁路无碴轨道施工关键技术和标准跨径桥梁动力特性研究[D].株洲:湖南工业大学,2011Liu Xiang.Study of the key technologies of high-speed ballastless track conseruction and dyna mic characteristics of the standard span bridge[D].Zhuzhou:Hunan University of Technology,2011
4刘勇,戴公连,康崇杰.中国高速铁路简支梁综述[J].铁道科学与工程学报,2015,12(2):242-249Liu Yong,Dai Gonglian,Kang Chongjie.Summary of simple supported beams of China high speed railway[J].Journal of Railway Science and Engineering,2015,12(2):242-249
5姚京川.高速铁路常用跨简支箱梁运营性能检定[J].中国铁道科学,2017,38(2):34-41Yao Jingchuan.Operational perfor mance verification of si mply supported box girders for high speed railway[J].China Railway Science,2017,38(2):34-41
6许三平.京沪高速铁路徐沪段桥梁设计[J].铁道标准设计,2010(7):41-45Xu Sanping.Bridge design of Xu-Hu section of Beijing-Shanghai high speed railway[J].Railway Standard Design,2010(7):41-45
7王召祜.京沪高速铁路桥梁设计[J].铁道科学与工程学报,2005,2(5):17-20Wang Zhaohu.Bridge design of Beijing-Shanghai high speed railway[J].Journal of Railway Science and Engineering,2005,2(5):17-20
8王争鸣.西安至成都高速铁路设计创新技术综述[J].铁道标准设计,2018,1(1):1-6Wang Zhengming.A summary of innovative design technologies for Xi'an-Chengdu high speed railway[J].Railway Standard Design,2018,1(1):1-6
9中华人民共和国铁道部.铁路工程抗震设计规范:GB 50111-2006[S].北京:中国计划出版社,2009Ministry of Railway of the People's Republic of China.Code for seis mic design of railway engineering:GB 50111-2006[S].Beijing:China Planning Press,2009
10张永亮,陈兴冲,丁明波,等.多遇地震下少筋混凝土重力式桥墩验算指标研究[J].铁道工程学报,2014,31(11):72-76Zhang Yongliang,Chen Xingchong,Ding Mingbo,et al.Research on checking index of gravity pier with less reinforce ment concrete under frequent earthquakes[J].Journal of Railway Engineering,2014,31(11):72-76
11裴路.高速铁路混凝土重力式桥墩抗震验算方法研究[D].兰州:兰州交通大学,2014Pei Lu.Research on seismic checking method of concrete gravity pier of high-speed railway[D].Lanzhou:Lanzhou Jiaotong University,2014
12文望青,罗世东.京沪高速铁路桥梁设计关键技术[J].铁道建筑技术,2009(2):30-39,49Wen Wangqing,Luo Shidong.Key technologies for bridge design of beijing-shanghai high speed railway[J].Railway Construction Technology,2009(2):30-39,49
13崔丽红,魏庆朝.铁路桥梁方案比选的计算机模拟系统[J].铁道工程学报,2001(2):30-32,72Cui Lihong,Wei Qingchao.Computer simulation system for comparison and selection of railway bridge schemes[J].Journal of Railway Engineering,2001(2):30-32,72
14杜燕群.桥梁上部预制结构形式的方案比选[J].科学技术与工程,2009,9(11):3138-3140Du Yanqun.Comparison and selection of bridge prefabrication[J].Science Technology and Engineering,2009,9(11):3138-3140