温州瓯江北口大桥主桥设计关键技术
发布时间：2019-01-26 08:38
【摘要】：温州瓯江北口大桥主桥为主跨2×800m的三塔双层桥面钢桁梁悬索桥,上层通行6车道高速公路,下层通行6车道一级公路。针对该桥多塔、大跨、双层桥面的特点,对其支承体系、加劲梁、中塔及其基础设计关键技术进行研究。基于结构受力合理性以及运营安全等因素,该桥支承体系采用纵向在加劲梁梁端设置阻尼器;竖向在桥塔及边墩处设置竖向支座,并对桥塔处进行压重;横向在加劲梁与塔柱间设置抗风支座。综合考虑运输及安装、抗风稳定性、使用功能及经济性等因素,加劲梁采用正交异性钢桥面板与主桁结合的整体式钢桁梁,全桥4跨连续。为节省造价、降低后期维养工作量,中塔采用纵向A形钢筋混凝土结构,在中塔主缆鞍槽中设置多道竖向隔板,以提高主缆钢丝与鞍槽间的摩擦力,保证主缆抗滑移安全。为提高结构刚度、降低造价,中塔基础采用防撞能力强的大型沉井基础。
[Abstract]:The main bridge of Beikou Bridge of Oujiang River in Wenzhou is a three-tower double-deck steel truss suspension bridge with a main span of 2 脳 800m. The upper deck passes 6-lane expressway and the lower layer passes 6-lane first-grade highway. According to the characteristics of multi-tower, large-span and double-deck bridge deck, the key technology of supporting system, stiffening beam, middle tower and its foundation design are studied. Based on such factors as structural rationality and operation safety, the supporting system of the bridge adopts longitudinal damper at the end of stiffened beam, vertical support at the bridge tower and side pier, and pressure on the bridge tower. Transverse wind support is arranged between stiffening beam and tower column. Considering the factors such as transportation and installation, wind stability, function and economy, the stiffening beam is composed of orthotropic steel deck slab and main truss. In order to save the cost and reduce the maintenance workload in the later period, the middle tower adopts longitudinal A-shaped reinforced concrete structure and sets up multiple vertical partitions in the saddle groove of the main cable of the middle tower, so as to increase the friction between the main cable steel wire and the saddle slot and ensure the safety of the main cable against slippage. In order to improve the stiffness of the structure and reduce the cost, the large caisson foundation with strong anti-collision ability is adopted in the middle tower foundation.
【作者单位】： 中铁大桥勘测设计院集团有限公司;浙江省交通规划设计研究院;
【分类号】：U442.5
，
本文编号：2415313
[Abstract]:The main bridge of Beikou Bridge of Oujiang River in Wenzhou is a three-tower double-deck steel truss suspension bridge with a main span of 2 脳 800m. The upper deck passes 6-lane expressway and the lower layer passes 6-lane first-grade highway. According to the characteristics of multi-tower, large-span and double-deck bridge deck, the key technology of supporting system, stiffening beam, middle tower and its foundation design are studied. Based on such factors as structural rationality and operation safety, the supporting system of the bridge adopts longitudinal damper at the end of stiffened beam, vertical support at the bridge tower and side pier, and pressure on the bridge tower. Transverse wind support is arranged between stiffening beam and tower column. Considering the factors such as transportation and installation, wind stability, function and economy, the stiffening beam is composed of orthotropic steel deck slab and main truss. In order to save the cost and reduce the maintenance workload in the later period, the middle tower adopts longitudinal A-shaped reinforced concrete structure and sets up multiple vertical partitions in the saddle groove of the main cable of the middle tower, so as to increase the friction between the main cable steel wire and the saddle slot and ensure the safety of the main cable against slippage. In order to improve the stiffness of the structure and reduce the cost, the large caisson foundation with strong anti-collision ability is adopted in the middle tower foundation.
【作者单位】： 中铁大桥勘测设计院集团有限公司;浙江省交通规划设计研究院;
【分类号】：U442.5
，
本文编号：2415313
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