多跨组合拱桥大悬臂整体顶推施工技术

来源 :第二十届全国桥梁学术会议 | 被引量 : 0次 | 上传用户:kingofking1
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本文主要介绍了杭州九堡大桥主桥(3×210)m组合拱桥整体顶推施工技术,重点对步履式平移顶推工艺关键技术进行了介绍,对顶推控制方法进行了说明.同时对多跨组合拱桥大悬臂顶推中出现的问题进行总结分析,以供今后同类工程借鉴之用;同时,本工程为步履式平移顶推工艺在大跨径桥梁施工中推广应用打下坚实的基础.
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本文以杭州市九堡大桥主桥(3×210)m组合拱桥整体顶推为背景,主要介绍新型顶推装置"步履式平移"顶推设备的研发思路、关键结构及相关试验应用情况.“步履式平移”顶推设备主要由顶推平移装置及控制系统组成,其中顶推平移装置分为上部滑移结构、下部支撑结构及液压装置。经过顶推设备空载及负载的相关试验,试验结果表明:空载时各油缸行程均能达设计要求,同步控制良好,误差为2mm之内,顶推时横向油缸可自由调整;负