Long Span Steel Arch Bridge Installed Tied Technology Research

Background engineering section of basket bowstring steel arch bridge, using the"ar" overall construction scheme construction. The features of the project: the arch ribalignment space X type,3D space curve; steel box arch and large segments, especiallythe mid-span closure segment larger segment of heavy weight, large size; because of thearch rib limit, conventional large floating crane hoisting bridge box girder constructioninconvenience; tied arch bridge arch rib to offset the huge horizontal the direction of thethrust of arch rib, after closure of the need to increase the temporary horizontalprestressed cable, bridge deck after the need for permanent horizontal prestressed cableconstruction.According to the relevant technical requirements were carefully studied, the maincontents of this thesis:(main end cross beam arch combined section) constructiontechnology of main arch installation; large segmental arch rib deformation control,space curve linetype control; main arch rib closure deformation control technology ofsteel box beam segment; hoisting technology of temporary horizontal cable; step by steptension, suspender construction, permanent level cable construction technology." Ar " overall construction scheme is: first in the erection of arch rib of temporarypier, using a large floating crane segment erection of arch rib, complete arch ribconnecting, increase the temporary horizontal cables to resist horizontal thrust of thearch rib; hoist lifting the installation of water box beam form. The main bridge arch ribis divided into three sections hoisting, reduces the number of arch rib segment and fieldwelding quality, accelerate the arch rib installation progress, to ensure that theconstruction period, reduces the engineering investment.Tied steel arch bridge construction with little support" AR method" for the overallconstruction scheme, is the future water navigation busy River Office of tied arch bridgewith a generalized form.