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南京长江三桥钢索塔施工测量技术

, PP. 73-80

Keywords: 桥梁工程,钢索塔,预拼装测量,拼装测量,控制网

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Abstract:

南京长江三桥为我国首座采用钢索塔结构的特大型斜拉桥。针对机加工车间的钢索塔节段预拼装工艺流程和桥位现场的钢索塔拼装施工流程,研究了预拼装过程中的微型控制网建立、测量点选择、钢索塔节段温度测量、钢索塔轴线偏差等方面的测量技术和数据处理方法。根据钢索塔的施工流程,提出了钢索塔拼装控制网布设、拼装定位等测量与数据处理方案;通过预拼装测量获取钢索塔已预拼装节段的状态,指导了钢索塔后继节段加工与调整,为桥位施工现场钢索塔拼装提供数据和保证了钢索塔拼装的顺利进行。南京三桥钢索塔的各项竣工数据指标均优于钢索塔验收标准,说明所采用的钢索塔施工测量方法完全满足特大型桥梁钢索塔设计、施工的需要,可以为同类型的工程提供参考。

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