Dong Xu, Liu Dehua, Meng Chunyu, Wang Peihe, Wang Puxu
School of Transportation and Civil Engineering, Shandong Jiaotong University, Ji’nan, 250357, China
The structural behaviors in each construction stage were monitored and analyzed against the background of a long-span prestressed concrete continuous box girder bridge with spans of 55+100+55 m. At first, the formwork erection elevation and pre-camber of the bridge in each stage, as well as stress values of key cross-sections were determined by simulating the whole construction process using the finite element software. Then, the design parameters were identified and the model was corrected by field data collection and considering various influencing factors, so as to ensure effectiveness of the model. Finally, the formwork erection elevation was adjusted according to the stress and altitude in each construction stage, followed by closure of the bridge. According to field monitoring and adjustment, the measured alignment and stress of the bridge conform to the design and the error meets the requirements of specification, indicating a favorable monitoring effect. The research can provide reference for construction of similar bridges.
long-span; prestressed concrete; continuous box girder bridge; cantilever-casting; construction monitoring
Dong Xu, Liu Dehua, Meng Chunyu, Wang Peihe, Wang Puxu. Construction monitoring of a long-span prestressed concrete continuous box girder bridge with variable sections. Academic Journal of Architecture and Geotechnical Engineering (2023) Vol. 5, Issue 1: 1-7. https://doi.org/10.25236/AJAGE.2023.050101.
 Chen Xu. Construction Monitoring Analysis of Long span Prestressed Concrete Continuous Beam Bridge [J]. Fujian Transportation Science and Technology, 2020 (03): 85-89
 Lai Canglin. Monitoring of cantilever casting construction of long-span prestressed concrete continuous box girder bridge [J]. Fujian Construction Science and Technology, 2018 (01): 53-55+86
 Wang Xiaokui, Wang Xingguo, Pan Deng. Linear monitoring analysis of construction process of prestressed concrete continuous box girder bridge [J]. Journal of Water Resources and Building Engineering, 2017,15 (06): 76-80
 Ding Yandong. Linear Monitoring of Prestressed Concrete Continuous Box Girder Bridge Construction [J]. Journal of Jilin University of Education, 2016, 32 (01): 184-186.
 Chen Haidong. Analysis on Construction Monitoring of Long span Prestressed Concrete Continuous Beam Bridge [J]. Science and Technology Outlook, 2015, 25 (22): 22-23
 Yao Jianpeng, Liang Mingsheng, Chen Zhongcheng. Cantilever construction monitoring of prestressed concrete continuous box girder bridge [J]. Highway, 2012 (02): 105-108
 Hu Qizhi, Zhuang Xinshan, Li Lingyu. Construction Monitoring of Prestressed Concrete Continuous Box Girder Bridge [J]. Northern Communications, 2010 (11): 37-40.