摘要
随着国民经济的发展,公路桥梁不但跨径不断增大,桥面也越来越宽,有关规范规定八车道的高速公路一般路基宽度为45m,传统的普通钢筋混凝土盖梁已不能满足较宽桥梁的建设需要。而预应力混凝土盖梁具有预应力构件节约钢材和混凝土的优点,经济效益显著,而且结构轻巧美观,施工工艺业已成熟,故大跨径预应力盖梁将成为发展的必然趋势。
With the development of national economy,the span of highway and road are enlarged constantly,and the bridge deck is getting wider and wider.According to the related rules,the sub-grade width of expressways with eight lanes is 45 meters,and the traditional reinforced concrete coping cannot meet the construction demand of wider bridge.But the inherent stress concrete coping has prestressed members which can save steel and concrete,the economic benefits are significant,the structure is light and beautiful,and the construction technology is already mature.Therefore,the inherent stress concrete coping will become the inevitable development trend.
出处
《交通标准化》
2010年第17期219-221,共3页
Communications Standardization
关键词
公路桥梁
预应力
盖梁
设计
highway and bridge
prestress
coping
design
