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| Research on the Adaptability of High Pier Railway Bridge |
| CHEN Si-xiao, WU Zai-xin,ZHONG Ya-wei |
| China Railway Eryuan Engineering Group Co.Ltd,Chengdu, Sichuan 610031,China |
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Abstract Research purposes:For the railway across dangerous mountainous area where there are deep canyons, a large number of long-span and high pier bridge is necessary. With the increase of running speed of newly-built railway and height of pier, in order to meet the dynamic performance of bridges, the selection of different types of high pier according to engineering geological characteristics of mountainous terrain is more important to reduce work quantities of pier and to optimize its economic indicator. In this paper, a study is made on the adaptability of high pier for railway bridge to master the mechanical characteristics, application range of rational height and economic indicator of different types of high piers.
Research conclusions:(1) This paper puts forward the economical and reasonable application scope of different high pier types: when H ≤80 m, single slope hollow pier should be the first choice; when 100 m>H> 80 m, the broom-type pier is more economical; when H>100 m, A- type (including herringbone) pier has obvious economic advantage; herringbone pier is suitable for high pier bridge with a height of 100~ 120 m, when H>120 m, A-type high pier should be the preferred choice. (2) Choice of reasonable foundation type for A-type (including herringbone) pier under different geological conditions in the mountainous areas: for the location where topographical slope is relatively steep and geologic condition is relatively good, A-type slant-legged separated foundation with unequal height may be used; for the location where the topographical slope is relatively gentle and the geological condition is relatively poor, A-type pier dumbbell foundation or monolithic foundation may be used. (3) The research achievement in this paper has a guiding significance to rational selection of pier type of railway bridge in the dangerous mountainous area.
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Received: 04 July 2014
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[1] 陈思孝,李锐,陈克坚,等. A型高墩大跨度混凝土连续刚构桥设计技术研究[R]. 成都:中铁二院工程集团有限责任公司,2012.
Chen Sixiao, Li Rui, Chen Kejian,etc. Research of A Type High Pier and Long Span Concrete Continuous Rigid Frame Bridge [R]. Chengdu:China Railway Eryuan Engineering Group Co.Ltd,2012.
[2] 铁道部第四勘测设计院. 桥梁墩台[M]. 北京:中国铁道出版社,1997.
The Fourth Survey and Design Institute of Ministry of Railways. Bridge Pier and Abutment[M]. Beijing:China Railway Publishing House,1997.
[3] TB 10002.1—2005,铁路桥涵设计基本规范[S].
TB 10002.1—2005,Fundamental Code for Design on Railway Bridge and Culvert[S].
[4] 陈思孝, 陈克坚, 李锐. A型高墩大跨度混凝土连续刚构桥设计技术研究[J]. 桥梁建设,2014(1):63-68.
Chen Sixiao, Chen Kejian,Li Rui. Study of Design Techniques of A-shape High-rise Pier and Long Span Concrete Continuous Rigid Frame Bridge[J]. Bridge Construction,2014(1):63-68.
[5] 陈思孝, 陈克坚. 重庆至利川铁路典型桥梁设计[J].高速铁路技术,2014(1):68-72.
Chen Sixiao,Chen Kejian. Design of Typical Bridge on Chongqing-Lichuan Railway[J]. High Speed Railway Technology,2014(1):68-72.
[6] 刘志军.长联高墩大跨不对称连续刚构桥设计与施工研究[J]. 铁道工程学报,2010(12):31-36.
Liu Zhijun. Reserch on Design and Construction of Long Connecting, High Pier,Large-span and Dissymmetry Continuous Rigid- Frame Bridge[J]. Journal of Railway Engineering Society,2010(12):31-36. |
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2014, Vol. 31 
