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正在修建的我国铁路第一座预应力混凝土斜拉桥,全桥总长398米,其中48+96+48米正桥部分为预应力混凝土斜拉桥。48米边跨拟在临时墩及便梁上就地灌注,96米中跨采用挂篮进行悬臂灌注。斜拉桥对混凝土的要求比较高:坍落度8～12厘米;水灰比应不大于0.40;初凝时间应晚于8～9小时;早期强度2天应不低于200号,4～5
The first prestressed concrete cable-stayed bridge under construction in our country with a total length of 398 meters, of which 48 + 96 + 48 meters is a prestressed concrete cable-stayed bridge. On the 48m side, it is planned to pour in situ on the temporary pier and the light beam, while the 96m mid-span adopts the hanging basket for cantilever perfusion. Cable-stayed bridge on the relatively high requirements of the concrete: slump 8 to 12 cm; water-cement ratio should not exceed 0.40; initial setting time should be later than 8 to 9 hours; early strength 2 days should not be less than 200, 5