台湾高速铁路C270标段高架桥设计概述

台湾高速铁路连接台北和高雄，总长345km，设计列车运行速度为300km／h，设计日载客量30万人次，工程总预算造价达160亿美元。台湾高速铁路线路沿台湾岛西部走廊走行，大部分建在高架桥上。台湾高速铁路项目采用与国际高速铁路一致的设计规范，同时考虑台湾为地震活跃地区，其抗震设计要求更为严格。台湾高速铁路的高架桥设计有3项基本要求：在正常工况下严格的列车运行性能；在严重地震状态下列车仍能以设计速度安全运行或制动；在极度严重地震后可以修复。本文介绍台湾高速铁路项目12个设计施工总承包土建合同之一的C270标段高架桥设计和项目管理，讨论满足设计要求的设计方法和施工方案。

A Brief Overview of C270 Viaduct Design of Taiwan HSR Project

The Taiwan High Speed Railway linking Taipei and Kaohsiung is 345km long.The design operation speed of the train is 300km/h and the design passenger flow is 300000 people daily.The estimated construction cost is US$16 billion.The rail alignment is running along the island's western corridor. The major part of this route is on high level viaducts.The specification for the project is stringent and in line with the international high-speed railway (HSR) standards.In consideration of the frequent seismic activities in this region,a more onerous seismic design requirement is imposed.The viaducts are required to satisfy three key performance requirements: strict ride performance under normal operating conditions;safe operation at the maximum design speed or braking during a significant seismic event;remaining repairable after an extreme earthquake.This paper describes the key aspects of design and project management in the design of the viaducts under Contract C270,which is one of the twelve general design-build contracts of this project.The design approach adopted to achieve a compliant viaduct structure and construction schemes is discussed in this paper.