At the same time, the structural alignment and stress in the bridge closure period and related conditions are monitored, and further verified the feasibility of construction control system.
同时对桥梁合拢阶段相关工况的线形和应力进行了施工监测，进一步验证了所采用施工控制系统的可行性。
2
The main causes of bottom flat crack are analyzed, mainly including radial force generated by closure strands stretching in middle span , non-structural elements and construction effects , etc.