成都第三绕城高速公路与多条铁路交叉方案分析

成都第三绕城高速公路南段在眉山市永丰村与多条铁路、高速公路发生交叉干扰。为合理跨越这些拟建、在建、已建的铁路及高速公路，需要对路线方案的优化及一系列桥梁跨越措施进行分析。拟定了三种路线方案与铁路交叉，通过在桥梁上部结构设置双重防撞护栏、异物监测等装置，同时加强设计及施工过程中的监管，采用合理的施工工艺等手段，确保了桥下高速铁路的正常运行。

Route Scheme of Third Beltway Around Chengdu Across Several Railways

The south part of the Third Beltway around Chengdu induces some interferences with several railways and highways at Yongfeng Village, Meishan. For reasonably crossing these proposed, being built or already built railways and expressways, the optimization of route scheme and a series of bridgecrossing measures need analyzing. The paper proposes three route schemes to cross railways. By setting double crush barriers and foreign matter detectors, strengthening the supervision on the process of design and construction, applying reasonable construction techniques and other means, the normal operation of high-speed railways under bridges are ensured.