To ensure the stableness and security of the train, the high speed railway's bridge camber must be extremely limited.

为保证列车行驶的平稳和安全性，高速铁路桥梁的上拱度有十分严格的限值。

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To install the crane span before installation, camber, level of metal structure of main girder bending, trolley rail height difference, gauge deviation, diagonal bridge survey.

安装前要对起重机安装跨度，金属结构主梁的拱度、水平旁弯，小车轨道高低差、轨距偏差，桥架对角线等进行测量。

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Rational internal force of hangers under different construction stage can be obtained through optimization analysis of the object under the finished bridge condition of the camber composite bridge.

通过对梁拱组合式桥梁成桥状态目标的优化分析，可以得到不同施工阶段合理的吊杆内力。

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