Operation method of concrete box girder sling by using bevel attaching mechanisms

Abstract

The invention relates to an operation method of a concrete box girder sling by using bevel attaching mechanisms. The operation method comprises the following steps that 1, preparation before hoistingis conducted, the purpose is to move the two bevel attaching mechanisms to the two sides of a concrete box girder, a supporting girder 11 is moved to the position above the concrete box girder, and connecting blocks 2 in the two bevel attaching mechanisms are fixed to the two ends of the supporting girder 11; 2, the bevel attaching mechanisms are arranged and hoisted, and the purpose is to arrangeand hoist the bevel attaching mechanisms to make extruding plates of the bevel attaching mechanisms be completely attached to the side faces of the concrete box girder and simultaneously rise with the concrete box girder; and 3, the bevel attaching mechanisms are separated, specifically, when the concrete box girder rises to the predetermined position, the bevel attaching mechanisms and the concrete box girder are separated; and the effect of circularly using hoisting operation is achieved.

Description

[0001] This application is a divisional application of the invention patent application with the application number: 2017105201706 and the title: "A Slope Fitting Mechanism and a Concrete Box Girder Spreader". The original application date is: June 30, 2017. technical field [0002] The invention relates to the field of hoisting of prefabricated concrete box girders, in particular to an operation method of a concrete box girder hanger using an inclined surface bonding mechanism. Background technique [0003] When the concrete prefabricated box girder is hoisted, because the concrete prefabricated box girder is large and difficult to fix, it is usually bound with steel wire ropes and then lifted by hoisting equipment. The premise of this hoisting method is that there must be enough space between the prefabricated concrete box girder and the ground for the wire rope to pass through, otherwise it is very difficult to bind the prefabricated concrete box girder; Shaking is inevit...

AI Technical Summary

Problems solved by technology

The premise of this hoisting method is that there must be enough space between the prefabricated concrete box girder and the ground for the wire rope to pass through, otherwise it is very difficult to bind the prefabricated concrete box girder; Shaking is inevitable, the steel wire rope and the concrete prefabricated box girder are squeezed, slid, and misplaced, and the contact area between the steel wire rope and the concrete prefabricated box girder is small, and the pressure is too concentrated, which can easily cause damage to the concrete prefabricated box girder Or wear off the strands of the wire rope, which will bring safety hazards

[0004] The existing concrete prefabricated box girder hoisting gear is the same as the steel wire rope hoisting principle. Before hoisting, a part of the hoisting gear needs to be placed at the bottom of the concrete prefabricated box girder, so as to further lift the concrete prefabricated box girder to realize hoisting; however, This hoisting method is complicated to operate, and the operation of placing the spreader on the bottom of the concrete prefabricated box girder itself is quite difficult, and usually requires the cooperation of other large-scale lifting machinery to complete the operation, which increases unnecessary manpower and material resources.

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