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。
Results prove that presumption of the causes of diagonal cracks in continual box-gird with pre-stressed concrete bridge is correct.
计算结果验证了预应力混凝土箱形连续梁桥中出现斜裂缝的原因推测。
In the design process of large span cable-stayed bridge, the influences of diagonal rope sags on the construction must be taken into account.
大跨度斜拉桥在设计过程中必须考虑斜拉索垂度对结构的影响。
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