Design and Construction of Sling Tower System for Long-span Continuous Steel Truss Arch Bridge
The sling tower is the key temporary structure in the construction of long-span continuous steel truss arch bridge.Taking the construction of steel truss arch bridge of Jianghan Seventh Bridge as an example,a finite element model is established to calculate and analyze the stress,deflection and overturning stability of cantilever erection under different working conditions.The construction measures such as factory manufacturing and on-site pre-assembly were adopted to solve the problem of overturning stability and closure of steel truss arch cantilever erection.The results show that by reasonably setting the tower height and the anchor points before and after the sling,taking measures such as side span weight and side fulcrum anchoring,the sling tower and the arch beam are subjected to synergistic force,and such goals as the internal force balance of the cantilever erection structure,good anti-overturning performance,good linear control and high-precision closure of the long-span steel truss arch are realized and the safety of the steel truss arch construction structure is ensured.
NETL
NSTL
万方数据
维普
