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技术创新
广西高铁首例特大桥“转体施工”成功对接
[字号: ]
2011年05月03日
作者:未知

广西贵港境内的南广铁路独屋特大桥工地,两片各重达4200吨的巨型桥梁在空中经过40分钟的挪动后,紧紧地对接在一起,这标志着广西铁路建设中首例“转体施工”顺利完成。

独屋特大桥是南广铁路的第一座铁路平面转体桥梁,是南广铁路铺轨中的重难点控制性工程。该桥总长为1535米,为单线铁路特大桥,共42个桥墩。由于大桥横跨正在运行的黎湛铁路,为了在施工中不影响铁路运行,要求采取“转体施工”的工艺技术,这在广西铁路建设中尚属首例。所谓“转体施工”,就是先在桥的两边进行桥梁预制,桥墩下边要求能够转动,最后,由机器拉动桥墩,使桥梁在空中实现对接。转体施工工艺新,转体系统的安装精确度要求极高,球铰安装的中心误差和平面误差都要求控制在1毫米内,滑道的平整度控制在2毫米内。

截至目前,南广铁路黎塘西至肇庆东已完成投资181.5亿元,占总投资337.9亿元的53.7%

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