The construction method of double-machine hoisting combined with roller bearing installation of oblique parallel chord truss truss

Abstract

The invention relates to a hoisting method of an oblique parallel chord member truss, in particular to an installation and construction method of lifting the whole oblique parallel chord member truss with two cranes combining a roll shaft support. According to the method, a two-crane and four-point hoisting way with large-tonnage and small-tonnage cranes is adopted for hoisting the whole truss. By reasonably distributing the equipment hoisting weight on the two cranes, the weights born by the two cranes are within permissible hoisting performance ranges respectively, and accordingly the truss hoisting operation is completed. When the truss is fixed to the roll shaft support, a disintegrating installation method is adopted to the roll shaft support. Before the truss is hoisted, firstly, the roll shaft support is placed at the top of a support pillar to be in keep with the axis of the top of the support pillar. After the support of the upper portion of the truss is hoisted on a top plate of the roll shaft support, the positions of the roll shaft support and the whole truss are checked again, if there is no error, a pre-buried piece, at the top of the support pillar, of a bottom plate of the roll shaft support is welded and fixed, and then the top plate of the roll shaft support and the support at the upper portion of the truss are welded and fixed. It is ensured that the horizontal force transmitted to the support from the truss structure can be released after the truss and the roll shaft support are fixed.

Description

technical field [0001] The invention relates to a production and installation method of an oblique parallel chord truss using roller shafts, in particular to a construction method for the entire truss of an oblique parallel chord truss to be lifted and hoisted by two machines combined with installation of a roller shaft support. Background technique [0002] In coal mining enterprises and large chemical enterprises, the coal transportation trestle of the ground production system plays an important role as the load-bearing structure of the transportation system, and the coal transportation trestle mostly adopts the structural form of oblique parallel chord truss. Due to the large height difference between the upper and lower fulcrums of the large-scale coal transportation inclined trestle, and the hoisting weight of the single truss is large and the installation height is high, it is difficult to control the overall balance of the truss during the hoisting of the trestle truss...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a construction method for the entire truss of an oblique parallel chord truss to be hoisted by double machines combined with the installation of roller bearings, which solves the difficult problem of balance when the oblique parallel chord truss is hoisted by two machines as a whole. At the same time, the roller bearings are disassembled and installed. Release the horizontal thrust transmitted from the truss to the support to ensure the safety of the truss structure