摘要
丹江口汉江公路大桥是省道S302跨越汉江的控制性工程。该河段西岸高陡、东岸平缓,深泓和主航道均偏于西岸,且需1跨跨越通航水域,推荐主桥采用(145+260+85)m双塔PC梁斜拉桥方案。经设计研究比选,采用"高塔固结+矮塔半飘浮"结构体系,该体系能顺应两塔不同的结构尺寸和刚度,将活载对桥塔内力进行了合理分配;采用H形桥塔,适应了当地的环境景观要求,同时基础规模较小,施工较便利;采用PC边主梁、环氧涂层平行钢丝斜拉索与环向预应力的塔端锚固型式,可方便施工与养护,降低造价。
The Hanjiang River Highway Bridge in Danjiangkou is a control point of the $302 provincial highway over the Hanjiang River. The environment of the bridge site is quite challeng- ing for the construction of a bridge crossing the navigational region with only one span, such as the high and steep west river bank, gentle east river bank, deep water and the fact that the main navigational channel is close to the west bank. As a result, the recommended scheme for the main bridge is a（145＋260＋85） m two-pylon PC girder cable-stayed bridge. According to the scheme comparison and selection, the structural system allowing the high pylon fixed with the girder and low pylon half float was chosen, which could meet the demands of different structural dimensions and rigidity of the two pylons and enable the internal force induced by live loads to achieve a rea- sonable distribution in the pylons. The H-shaped pylons on the one hand are in harmony with the local landscape, and on the other, require small foundations and are conducive to construction. The implementation of PC main edge beams, epoxy-coated parallel steel wire stay cables and tow- er-end anchoring system with loop prestress facilitate the construction and maintenance and reduce the costs.
出处
《世界桥梁》
北大核心
2016年第3期11-15,共5页
World Bridges
关键词
丹江口汉江公路大桥
斜拉桥
结构体系
PC梁
高低塔
方案比选
桥梁设计
Hanjiang River Highway Bridge in Danjiangkou
cable-stayed bridge
structure system
PC girder
high and low pylons
scheme comparison and selection
bridge design
