Abstract : the proper of miaogou bridge is a through railway arch bridge with the concrete - filled in steel tube , which main span is 76 m . the construction , arch type , structural analysis , and section determination of this bridge are introduced 文摘:西安安康铁路庙沟大桥主桥为主跨76m的下承式钢管混凝土拱桥，介绍了该桥的构造、拱型、结构分析、截面拟定等主要设计思想。
We manufacture coaxial cable , produce catv cables and drop cables , including rg59 , rg6 , rg7 , rg11 and so on . as an iso9002 certificated enterprise , we can supply highest quality of productswith available price for you 主要产品有： sywv y 75系列物理发泡同轴电缆rg系列rg6 rg7 rg11 rg13 rg58 rg59 rg174 rg213 rg214接入网用同轴电缆包括普通型四屏蔽型和自承式电缆。
The construction of concrete filled with steel tubular ( cfst ) arch bridge has been developed in recent ten years in our country . although about 40 bridges whose span are longer than 80 meters are constructed , there are only two through tied ? rch bridges without wind bracing , including guangzhou jiefang bridge 近10年来，我国钢管混凝土拱桥建设发展迅猛，已建成的跨度大于80米的约有40多座，而无风撑下承式系杆拱桥仅2座。
Taking the 4th binhai road bridge in the development zone of dalian city as an example , this paper presents the key points of the overall design , plane and spatial static analysis , stability analysis and construction technology of long span half - through concrete filled steel tube arch bridge 摘要以大连市开发区滨海路四号桥为例，介绍大跨度中承式钢管混凝土拱桥的总体设计、平面静力分析、空间静力分析、稳定分析和施工工艺的要点。
With the actual locale incestigating , the actual locale testing and the theories analyzing of the reason of the diseases producing of the exceed limit of horizontal swing and steel pole ' s break , and summaried the reinforcing measure of the top bear armor plate beam 通过对京广线郑州黄河大桥40米上承式钢板梁横向摆动严重超限及钢梁杆件断裂等情况的现场调查、现场测试和理论分析及病害原因产生的机理，总结提出了上承式钢板梁的加固措施。
For do n ' t delive the horizontal power , connect method adopt the double hingle connect , and made both girder just to deliver the horizontal power each other , and vertical power can change position , this the problem that the top bear armor plate beam do n ' t accommodate the increasing in speed had been resolved radical 为了不传递竖向力，连接方式采用双铰接，使两孔梁只能相互传递横向力，竖向可以变位，从而基本解决了上承式钢板梁不适应提速问题。
Because of the original design standard was low , the horizontal angur rigidity is serious lack , when the high speed train passes , the exceed limit of the horizontal swing had affected the lifting of the main trunk line , these diseases had been existed earlier but had not been gotten to resolve radical , and along with the increasing in speed of railroad train , these diseases performance will be more seriously , it ' s time for resolve 同时提速列车对桥梁结构的动力作用增大，特别是对上承式钢板梁。由于原设计标准低，横向刚度严重不足，高速列车通过时横向摆动严重超限等已严重影响了主要干线的提速，这些病害很早就存在但没有得到根治，随着列车提速，这些病害表现越来越严重，已到了必须整治的时候了。
The cfst x - type arches improve the lateral stability by sloping the arc ribs , so it is ofen used in the designs of cfst arch bridge with small ratio of the width to the span . tongwamen bridge is a half - through cfst arch bridge , its span is 238m , and the width of its roadway is 10m , so the truss ribs in - plane is sloped into x - shapc to improve its lateral stability . as the cfst x - type arches with longest span all over the country presently , the design of tongwamen bridge can be used for reference of adopting cfst x - type arches in the design of arch bridges with small ratio of the width to the span 钢管混凝土x型肋拱桥是一种利用拱肋侧倾来提高其横向整体稳定性的桥型，在宽跨比较小的钢管混凝土拱桥设计中应用较多。浙江铜瓦门大桥是一座中承式钢管混凝土无铰拱桥，跨径238m ，桥宽10m ，拱肋为平面桁架形式，所以采用了x型拱肋以提高其横向稳定性。作为国内目前跨径最大的钢管混凝土提篮拱桥，该桥的建成对我国今后长大跨径小宽跨比钢管混凝土拱桥采用提篮拱具有借鉴意义。
Based on qualitative analysis and comparison of several options for suppressing transverse vibration on deck type steel plate girder of railway bridge , conclusions are made as follows : with static reinforcing , the vibration amplitude can be suppressed to some extent , but quasi - resonance of the bridge can not be avoided , moreover , the construction is inconvenient and costly . with option of two bridge connection , the effectiveness of vibration suppression is clear ( the damping ratio approaches 50 % ) and it is fairly economic and easy , however , the quasi - resonance of the bridge can not be avoided either . with dynamic option ( mtmd option ) , the quasi - resonance of the bridge can be effectively avoided ( the damping ratio is up to 51 . 38 % as tested in field ) , moreover , the construction cost is low , and the construction is simply and convenient 通过对目前抑制铁路上承式钢板梁桥横向振动的几种方案进行定性的分析和比较，认为：静力加固方案可以使桥梁振幅有所减小，但不能避免准共振现象的发生，而且工程造价较高，施工也不方便；两桥连接方案减振效果明显(减振率近50 % ) ，比较经济也比较方便，但同样不能避免准共振现象的发生；动力减振方案( mtmd抑振方案)可以有效的抑制桥梁的准共振现象(现场试验中减振率达51 . 83 % ) ，而且工程造价较低，施工简单、方便。
This type was adopted for the first time in cangzhou city and hebei province , and it is suitable for the region with poor foundation , it offers wide condition for the construction and it is economical , its exterior is handsome , especially suits for the bridge of city . this paper is of great importance for guiding the design and calculation for this type of bridge ; and it promates the research and application of the new type of cfst for the purpose of widely spreading it in the field even the resign 下承式钢管混凝土系杆拱桥型式在沧州市乃至河北省都是首次采用，适于建于地基条件较差的地区，施工条件宽松，造价较经济，外型美观，尤其适用于城市桥梁。本文对今后该类型桥梁的设计计算和施工具有重要的指导意义，为在本行业乃至本地区继续推广钢管混凝土这一新型结构的研究与应用起到了推动作用。
