Study On Square Box Bolt Welding Girder Steel Bridger Interface Friction-increasingcoat

In the construction of highway bridge and railway bridge, square box boltwelding girder steel bridge is commonly used in the construction of steel bridge. Thejoin between girder and girder is significant for the construction of the whole bridge.Through test ,the conclusion is as follows: In order to obtain reliable join, notonly we use high strength , special screw, but also the interface must provide enoughability of slip-resisting. That is to say, by making friction-increasing coat use hot spraytechnology on the interface, It is spray zinc and aluminium to composite coat on theinterface between girder and girder ,through test analyse of compositefriction-increasing coat ability of slip-resisting, prove had made friction-increasingcoat can improve the slip-resisting coefficient (friction coefficient),raise ability of theslip-resisting.Based on experiments, the paper selects question on construction of makingthe friction-increasing coat in square box bolt welding girder steel bridge,and themethod and craft of making the friction-increasing coat on interface.Had developedarc spray making the friction-increasing coat craft.Through practice using ,the coat can more and more raise the reliability joinsin steel bridge.. Based on the result of experiment,the conclusion is as follows: by arc spraytechnology making friction-increasing coat ,on interface of itcan guarantee active and exceed design demand of interface the slip-resistingcoefficient.