高速铁路桥梁移动模架结构计算及预拱度设置  

Calculation of Movable Die Carrier and Determination of Pre-camber of Bridge of High-speed Railway

作　　者：吴尚德[1] 

机构地区：[1]甘肃铁一院工程监理有限责任公司,兰州730000

出　　处：《铁道工程学报》2013年第2期58-62,共5页Journal of Railway Engineering Society

摘　　要：研究目的:根据沈丹客运专线沿线桥梁桥址所处自然环境条件,对于部分特殊地段桥梁,需采用移动模架造桥机施工。本研究旨在通过实际计算验证MZ900S型上行式移动模架造桥机设计和制造质量,同时准确掌握现浇箱梁施工过程中模架造桥机各工况下的实际挠度和刚度,以确保设备在投入使用后能正常工作。研究结论:(1)计算及堆载试验表明移动模架强度、刚度、加工质量和拼装质量满足设计要求,按y=0.121 3x2-30.1设置预拱度是合理性的;(2)具有结构受力明确,适应能力强,功能完备,机械化程度高等优点;(3)可满足24 m箱梁、曲线桥梁、双向、32 m整孔节段拼装箱梁架设工艺的施工要求。Research purposes： The bridges in the special sections needed to be built by using the bridging machine with movable die of the Shenyang - Dandong Passenger Dedicated Line carrier because of the natural environment conditions. The calculation was made to verify the design and manufacturing qualities of the MZ900S type Bridging machine with upstriker movable die carrier, know the actual deflection and stiffness of the bridging machine under the various working states during construction of cast - in - situ box girder and determine the reasonable pre - camber according to the y = 0. 121 3x2 -30.1 for the purpose of ensuring the bridging machine in the good working state in service. Research conclusions： （1） The calculation and heaped loading test showed the strength, stiffness, manufacturing quality and assembly quality of the movable die carrier met the design requirements and the pre - camber was reasonable according to the y = 0. 121 3x2 - 30.1. （ 2 ） The movable die carrier had the features of the clear loading on the structure, good adaptability, perfect functions and high mechanization. （3） The movable die carrier met the construction requirements for the 24 m box girder, the curve bridge, the bidirectional 32 m box girder with assembly of integrated 32 m bridge opening

关 键 词：支架结构计算 试验方案 变形观测 反拱计算 预拱度设置 

分 类 号：TU7[建筑科学—建筑技术科学]