1. During the construction of the main girder, construction control must be carried out, that is, the results of each construction stage of the beam body should be tested, analyzed and checked in detail to determine the cable force value in the next construction stage and the control values of the main girder alignment, elevation and cable tower displacement, and so on until the bridge is completed.
2, the main girder construction control measurement environment requirements are as follows:
1) Try to choose windless or breezy weather to eliminate the influence of wind load.
2) The measurement shall be made from 0: 00 am to 7: 00 am (before sunrise).
3) The measurement should be completed in a short time, so as not to change the test conditions too much.
4) Mechanical construction should be stopped during measurement to eliminate the influence of automobile braking force.
3, the main contents of the construction monitoring test:
1) deformation: deviation of main girder line shape, elevation and axis, horizontal displacement of tower top;
2) Stress: changes of cable force, bearing reaction force and beam tower stress during construction;
3) Temperature: the temperature field and changes of towers, beams and cables during the specified measurement period.
4. For cable-stayed bridges with unconsolidated tower beams, the tower beams must be temporarily consolidated during construction, and the temporary consolidation will be released according to the specified procedures after closure to complete the structural system transformation. The observation of temporary consolidation should be strengthened during construction.
For more information about project/service/procurement bidding, and to improve the winning rate, please click on the bottom of official website Customer Service for free consultation:/#/? source=bdzd