Combined with the example of walking incremental launching construction of prestressed groove beam,the finite element software is used to simulate and analyze the incremental launching construction of groove beam.According to the calculation results,the corresponding deformation and stress monitoring sections are arranged at the unfavorable positions of guide beam and trough beam to monitor the incremental launching process in real time.Through the comparative analysis of field measurement and theoretical calculation,the measured deformation and stress of the guide beam and the main beam during the whole jacking process are consistent with the theoretical calculation trend.There will be factors such as jacking force,jacking displacement,and on-site ambient temperature that cause the measured and theoretical deviations.In general,the structural deformation is within the allowable deformation range of the jacking construction,and the stress does not exceed the allowable limit of the material,and the entire jacking is in effective monitoring.
Groove beamWalking type jackingFinite element calculationMonitoring cross section
NETL
NSTL
万方数据
