TLJ450t型架桥机主要用于450t双线并置箱梁20m/24m/32m等跨及不等跨桥梁的架设。该机架梁方式为两跨三支点架梁,过孔方式为纵移迈步式,作业程序简洁,变跨、转场方便,可实现高位驮运转场和降低高度后由运梁车驮运通过隧道。介绍架桥机的主要技术参数、主体结构及作业方法。 TLJ450t-type bridge machine is mainly used for 450t double-line juxtaposed box girder 20m / 24m / 32m span and span across the bridge erection. The rack girder way is two spans and three support girders. The way of passing through holes is the step-shifting step-by-step method. The operation procedure is concise, changeable and easy to transfer. It can realize high carrying and lowering of height, tunnel. Introduce the main technical parameters of the bridge machine, the main structure and methods of operation.