成都二绕广汉高架桥（50＋90＋50）m连续刚构桥设计要点

成都第二绕城高速公路作为四川省高速公路网布局规划和成都市综合运输体系的重要组成部分,对于缓解现有绕城高速公路交通压力、分流城市过境交通、完善西部综合交通枢纽、引导城市空间和产业合理布局、增强成都对全省乃至西部的辐射带动作用至关重要.结合成都第二绕城高速公路东段广汉高架桥（50 ＋90 ＋50）m连续刚构桥上部结构的设计,介绍了连续刚构桥的一些设计要点和构造措施,阐述了其主要设计思路和方法,并对施工需注意的一些事项作了一些介绍,为连续刚构的设计提供设计经验.

The Design Main Point of Chengdu Second Round High-speed Viaduct in Guanghan 50 ＋ 90 ＋ 50 Meters Continual Steel Structural Bridge

As a significant part of highway network layout planning of Sichuan Province and comprehensive transportation system of Chengdu, firstly, the second ring highway of Chengdu has great influence to alleviate the existing ring highway traffic pressure. Secondly, it can diverge the city transit traffic and improve integrated transport hub in Western China. Last but not the least, the Chengdu second ring highway also does a favor to guide the urban space and reasonable industrial layout, besides, it strengthen the leading role of entire province and even the western China. Based on the Chengdu east second ring highway viaduct in Guanghan 50 ＋ 90 ＋ 50 meters upper structure of long span continuous rigid frame design, this paper briefly introduces the design key points and construction measures of long span continuous rigid frame, and expounds its main design thought and method. Furthermore, this article will illustrate some matters which need to be cared in construction. Consequently, it offers some experience for the design of the continuous rigid frame.