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l_p=23.8m～31.7m(图号006,006A)新结构预应力梁设计图,先后在丰台桥梁厂、太原轨枕厂等正式进行生产,特别是丰台桥梁厂去年已大量投产。通过丰台厂一年多来生产实践,多次静载试验以及架梁、运营证明,梁的质量是良好的。但由于新结构梁下缘高度为15厘米较老梁低,特别是31.7m的梁,梁体较重,
l_p = 23.8m ~ 31.7m (Fig. 006,006A) The new structure prestressed beam design, has in Fengtai Bridge Factory, Taiyuan sleeper factory formally produced, in particular, Fengtai Bridge Factory has been put into operation in large quantities last year. Through the Fengtai plant more than a year of production practice, static load test and beam rack, operation proved that the quality of the beam is good. However, due to the lower edge of the new structural beam is 15 cm lower than the old beam, especially 31.7m beam, beam heavier,