Project Design And Analysis Research Of Extrodoser Cable-stayed Bridge

Low tower cable-stayed bridge is a new kind of structural forms of bridge, which is between the PC continuous box beam bridge and the PC cable-stayed bridge. On the base of summarizing the development of this bridge type and research status at home and abroad, the paper discusses the characteristics of low tower cable-stayed bridge and the main points of design. According to the background information which will affect the construction of Ling-river Bridge including local weather, water character, geology, earthquake, ship transportation, construction material and transportation conditions etc and consider the design features and technical standard of configuration combined with landform, river, geology of river bed, requirements of open traffic, flood-resistance of riverbank, and environment effect, the paper selects the detailed bridge location and design the bridge style scheme, and puts forward three bridge schemes including concrete continuous beam bridge, low tower cable-stayed bridge and cooperative system of cable-stayed bridge with one tower and continuous beam, and do the design, calculation and compare for the overall layout, structure analysis (including static analysis, bridge tower calculation, local stress calculation of girder, foundation calculation and vibration analysis), construction scheme. The results show that the bridge style of low tower cable-stayed bridge with the spans of (92+3×152+92)m has many strongpoint including light structure, reasonable stress performance, slinky style, construction convenience, cost-effective etc...