上跨既有繁忙高速公路的桥梁方案浅析

Elementary Analysis on Bridge Scheme Overpassing Existing Busy Expressway

介绍了国内常用的上跨高速公路的桥型方案,分为中分带设墩与不设墩两大类。以苏州市中环快速路西线上跨沪宁高速公路的实际工程项目为背景,介绍该项目桥梁方案设计与比选的经过。共设计三个合理可行的方案,经多方面详细的比选,选择顶推施工钢箱梁桥为推荐方案。目前该项目已竣工通车,有关经验可供设计同行参考。

The article introduces the common bridge schemes overpassing the expressways in China including two kinds of setting up the piers or not piers in the middle strip. Taking the practical engineering project of Suzhou Middle Ring Expressway West Line overpassing Shanghai- Nanjing Expressway as the background,the article introduces the process of design, comparison and selection of this bridge schemes. There are three designed reasonable and feasible schemes. The incremental launching construction of steel box beam bridge is selected to be the recommended scheme after the detailed comparison and selection from many aspects.This project has been open for traffic now. The relative experience can be referred for the design of the similar projects.