Study on the Design of Viaduct in Long-span Station
With the development of high-speed railway,many stations became multi-line junction stations,forming a multi-level station pattern.The layouts of station buildings have higher requirements for the intensification of land resources,and more and more hub stations have adopted the form of"building-bridge integration"station.The bridge in the elevated station not only needs to satisfy the crossing requirement,but also needs to satisfy the overall layout of the station building and the needs of passengers,which results in the selection of the scheme become the key point of design.Taking Nantong to Ningbo high-speed railway Suzhou South Station as an example,this paper determined the optimal bridge scheme through the economic and technical analysis of different bridge schemes.Combined with the bridge scheme,the design scheme of different types of platform beams was studied.Finally,the prestressed concrete continuous rigid frame with platform and tracks integrated was proposed and successfully applied to engineering practice.The integrated bridge structure with the main span of 128 m was used in this project to enrich the application of the long-span bridge structure in the elevated station,and provided a new way of thinking for the design of"building-bridge integration"elevated station.
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