Cultivating technical capabilities of enterprises is an important task of the Sutong Bridge project

The paper analyzes existing state of innovation system in the field of public infrastructure construction in China and elaborates on the duty and role of owner in establishment of a technical innovation system with enterprise as the main body following the process of production-education-research. This paper also claims that the key project construction is an important resource to enhance national capability of innovation and accordingly puts forward an effective approach to cultivate the core competitiveness of leading enterprises on the basis of practice in the Sutong Bridge project.     

General design of Sutong Bridge

The main span of Sutong Bridge is a double-pylon, double-plane cable-stayed bridge with steel box girder, which has the world＇ s longest central span of 1 088 m within cable-stayed bridges. To overcome problems caused by severe meteorological conditions, perplexing hydrological conditions, deep buried bedrock and higher navigation level, many new technics and methods were created. Keys including structural system, steel box girder, stayed cable, tower, pier, tower foundation, collision avoidance system, wind-resistance, seismic-resistance, structural nonlinear response and structural static stability were presented individually in this paper.     

大跨度钢管混凝土拱桥肋缆索吊装施工技术

茅草街大桥为主跨368 m的自锚中承式钢管混凝土拱桥,在同类型桥型中跨度最大.主拱拱肋采用三跨缆索吊吊装施工,技术含量高,施工难度大,实践表明,茅草街大桥钢管拱肋缆索吊装施工较为成功,其经验值得为同类型桥梁施工借鉴.     

径向基神经网络的大桥形变预测

为解决由于材料老化、疲劳效应、荷载作用和环境变化等多种因素造成的大桥基础及上部结构形变影响,必须对大桥形变及其影响因素进行监测.针对大桥形变影响因素复杂多变的特点,采用径向基神经网络形变预测模型,推导了网络参数的改进算法,利用大桥实际监测数据,建立了径向基网络形变预测模型.研究结果表明:该方法在水平方向和垂直方向均能够达到4 mm以内的形变预测精度,能够为大桥的安全运行提供保障.     

国道212线羊儿坝大桥检测与鉴定技术

国道212线羊儿坝大桥建成于1965年4月,历经近半个世纪的营运,桥梁上部结构出现了不同程度的病害.通过对羊儿坝大桥的全面检测和荷载试验,获得了比较全面的性能参数,了解了结构在荷载作用下的工作状态,并依据检测结果综合判断了结构的实际承载能力,为大桥的维修加固提供了理论依据.     

浅谈大桥承台施工要点控制

本文结合作者多年的工程实践经验就大桥承台施工要点控制进行叙述，希望通过以下叙述，能与各位同仁相互交流，同时今后也能够为类似工程的施工提供一些借鉴与参考。     

浅谈称重传感器工作原理及故障排除

文章详细介绍了复合式缆索吊机在落布溪大桥拱肋吊装中的应用,并简单介绍了线形控制的原理和方法。     

北盘江大桥索塔施工的主要工艺探析

现场安装索塔施工是整个桥梁工程的重中之重。本文分析了北盘江大桥索塔工程的主要施工工艺，包括：施工程序及主要机械设备选型，具体施工方法等等。     

东江大桥钢桁梁架设线形控制

东江大桥为莞深高速和东莞环线交会处横跨东江的一座三桁双层钢性悬索加劲三跨连续钢桁梁桥,架设过程中平弦的线形控制是钢梁平弦顺利合拢和加劲弦顺利安装的保证。     

结合京杭运河洋河大桥浅谈桥面系防水系统处理

本文论述了桥面水对混凝土桥粱的危害,论证了设置桥面防水系统的重要性,进而论述了桥面系构造必须注意的要点,并结合京杭运河洋河大桥介绍部分桥梁防水实用技术及施工方法.