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由中铁三局集团等公司联合设计研发的JQX900/32型架桥机具有如下优点:当桥台紧靠隧道口架末孔梁时桥台与隧道口距离小;作业高度距已架梁梁面实际值11.8m,与其它机型相比(13.44～13.85m)为最小;过隧道时,运梁车驮导梁与架桥机一次通过,拆卸工作量少;在隧道口靠近桥台架首孔24m梁时采用后起吊位吊梁,使隧道口与桥台距离最小;采用定点吊梁,将主梁高度降为1.8m,常规各型架桥机则为2.5～3m;采用运梁车不上导梁方式,使导梁高度压缩到2.38m;该机很好地解决了进隧道前架末孔梁、降低高度过隧道、出隧道后架设首孔梁这3个技术要素。同时指出,该机在结构设计上也存在以下缺点:采用导梁后退让出梁位的方法,使导梁移行距离约为梁跨长度的5倍,费时,而且机构复杂繁琐,发生故障的概率增大,特别是在机器用旧、磨损以后;机器有些局部强度、刚度有待改进补强;导梁的支撑方式对导梁前腿的垂直度要求高,在工地上不易控制,而且存在重大稳定性隐患,宜尽早进行设计优化,同时采用以导梁前移取代导梁后退让出梁位的方案。
The JQX900 / 32 bridge erecting machine designed and developed jointly by the China Railway Group and other third-party companies has the following advantages: When the abutment abutting the last hole of the tunnel mouthpiece, the distance between the abutment and the tunnel mouth is small; the working height is away from the girder The actual value of 11.8m, compared with other models (13.44 ~ 13.85m) is the smallest; when crossing the tunnel, transport beam beam guide beam and bridging machine once, less disassembly; in the tunnel near the bridge head Hole 24m beam after the lifting of the suspended beam, the tunnel mouth and abutment minimum distance; the use of fixed-point crane beam, the girder height is reduced to 1.8m, conventional bridge erecting for 2.5 ~ 3m; Not on the guide way, so that the guide beam height compression to 2.38m; aircraft to solve the tunnel into the tunnel before the end of the beam, reduce the height of the tunnel, the first beam after the tunnel erection of the three technical elements. At the same time, it points out that the machine has the following shortcomings in structural design as well: The method of using the guide beam to retract and give out the beam position makes the guide beam travel a distance of about 5 times the length of the beam span, time-consuming, complicated and cumbersome mechanism, Increase, especially in the old machine, after wear; some local strength of the machine, the stiffness needs to be improved to strengthen; guide beam support the front legs of the guide rail verticality requirements are high, difficult to control the site, and there is significant stability Hidden dangers, should be designed and optimized as soon as possible, at the same time using guide beam to replace the guide beam back to give up the beam position of the program.