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土模制造鱼腹式预应力钢筋混凝土铁路梁是广大建挢职工在无产阶级文化大革命中的一项技术革新,它的优点是可以因地制宜,以土模代木模,节省木材,减少长途运输,便于大打人民战争,适应战备需要,为现场制梁增加了一个新途径。 1970年下半年在大桥局谷城桥梁工厂用土模试制了九片鱼腹式预应力梁,并对前三片进行了静载抗裂及破坏试验,试验结果表明:抗裂性及强度安全系数均达到设计要求(见本刊71年第三期“土模制造23.8米、31.7米鱼腹式预应力钢筋混凝土铁路梁”一文)。遵照伟大领
The manufacture of fishbone prestressed reinforced concrete railway beam is a technical innovation made by the majority of workers and staff members in the Great Proletarian Cultural Revolution. Its advantages are that it can be adapted to local conditions, using soil and mold instead of wood model, saving timber, reducing long-distance transportation, It is easy to fight the people’s war and meet the needs of combat readiness. It has added a new way for the construction of the beam. In the second half of 1970, nine pieces of fish-belly prestressed beams were tested on earth molds at Gucheng Bridge Plant of the Bureau of Bridge. The first three pieces were tested by static load cracking and failure tests. The results show that the crack resistance and the safety factor of strength All meet the design requirements (see Article 71 of the third issue of “soil model 23.8 meters, 31.7 meters fish belly prestressed reinforced concrete railway beam” article). Follow the great collar