Method for high altitude installation of large span steel truss

Abstract

The present invention relates to a method for installing a large span steel truss on high altitude. The method comprises the steps of arranging embedded part on the structure girder at two sides of the designed position of the steel truss, then installing extensible guide on the embedded part, and at last assembling a specialized steel structure tackle. Firstly, a large tonnage hoisting machine is used for hanging the steel truss which is wholly assembled underground to two tackles that are arranged on station. Afterwards, the steel trust is parallelly moved to the installation position through the synchronous slippage of two tackles on the extensible guide. Lastly, the two-end capitals of the designing position of the steel truss are installed with an independent holding pole, a chain block and a pulley assembly. These hoisting apparatuses are used for hanging the longeron from the tackle. The longeron of the lengthened part is cut and the steel truss is installed to the position according to the design requirement. Compared with the traditional high altitude dispersed splitting method for building whole surface of scaffold, the installing method provided by the invention subtly settles many abuses of difficulty for controlling the construction quality, long construction period and the like in the traditional method. The manpower and considerable material transportation are saved and the construction quality can be effectively guaranteed. Various requirements of the designing and constructing are excellently and rapidly satisfied.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a high-altitude installation method for a large-span steel truss. Background technique [0002] The common method of high-altitude installation of long-span steel trusses in the process of building construction is to use cranes to directly hoist them into place. When the installation position of the steel truss is outside the working radius of the crane and cannot be hoisted directly by the crane, the traditional method is: set up a full house of scaffolding, and assemble the rods on the scaffolding on site. Since the assembly is carried out at high altitude, a large amount of labor is required, time-consuming, low in efficiency, and a large amount of turnover materials are required, and the cross-sectional geometric dimensions, verticality, bending sag, camber, and welding quality of the joints of the truss members are all relatively low. It is difficult to control the segm...

AI Technical Summary

Problems solved by technology

Since the assembly is carried out at high altitude, a large amount of labor is required, which is time-consuming, low in efficiency, and requires a large amount of turnover materials, and the cross-sectional geometric dimensions, verticality, bending sag, camber, and welding quality of the truss member joints are all relatively low. It is difficult to control the segmented assembly on the ground, which increases the difficulty of construction