介绍叶茂互通立交设计的概况，综述立交匝道跨线桥的总体设计及实心板在中、小跨径弯桥中的应用前景。
The paper describes in general the design of Yemao Interchange and the overall design of the ramp flyover, it also specifies the application future of solid slab in medium and small sized bridges.
早期修建的小跨径钢桁梁悬索桥大部分已接近设计年限，正确评估其承载能力是桥梁维修、加固和技术改造的基本依据。
Most of Minisize span suspension Bridges with steel truss beam constructed in early age will approach its designed working life.
同时，简支板梁桥又是小跨径桥梁最常用的桥型之一，因此，移动车辆荷载引起的简支板梁桥动力效应越来越被工程技术界所关注。
So the dynamic response of the plate girder bridge under moving loads are the problem which is concerned about all along, and also a project to be studied deeply.
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