栈桥式平移法换架高速铁路简支箱梁技术研究

随着我国高速铁路桥梁的快速发展,各种灾害对其造成破坏的可能性增高。为了能够有效应对未来高速铁路桥梁灾后的快速保障需求,重点研究将来高速铁路桥梁遭受灾害损毁破坏后,在通过抢修钢梁保证临时限速通车的情况下,采用栈桥式平移法实现新制混凝土箱梁和临时抢修钢梁换装施工的技术方案。主要研究内容包括:总体技术方案、施工场地布置方案、施工设备的设计方案和换架梁施工工艺等,并总结该项技术的关键技术要点和方案的适应性。通过研究说明,栈桥式平移法是一种安全可靠、成本低廉、快速有效的换架梁施工技术,有助于推动我国高速铁路桥梁灾后应急保障技术的发展,并为同行提供有价值的参考。

Research on the Replacement of High Speed Railway Concrete Box Girder with Trestle Translation Method

With the rapid development of China's high-speed railway bridge,the potential damages generated by various disasters to the bridge increase. In order to cope with future requirements for high speed railway bridges damaged by disasters,this paper focuses on the application of trestle translation method to replace new concrete box beam with temporary emergency steel girder under the condition that the emergency steel girders are used to ensure temporary speed limit. Researches are concentrated on the overall technical planning,construction site layout,construction equipment design and construction technology,and key technical points and the adaptability of technical scheme are summarized.Researches show that the trestle type translation method is a safe,reliable,low cost,fast effective construction technique and is helpful to promote the development of the emergency rescue for high-speed railway bridge in China,and may provide valuable references for similar projects.