A staggered-level closing installation method for long-span steel structures

Abstract

The invention relates to a large-span steel structure staggered-layer closure installation method. The method comprises the following construction steps that S1, installing a supporting frame; S2, mounting a first-layer beam: namely fixing one end of the first-layer beam to a bracket on a core tube on one side, disconnecting and temporarily connecting the other end of the first-layer beam with a bracket on the core tube on the other side; S3, installing a first-section supporting column and a second-layer beam: specifically, fixedly arranging the first-section supporting column on the first-layer beam, installing the second-layer beam in a segmented mode, and making the disconnection position opposite to that of the first-layer beam; S4, mounting a third-layer beam: hoisting the three-layer beam to a mounting position in a segmented manner, fixedly connecting the bottom of the third-layer beam with the top end of the first-section supporting column, and making the disconnecting position of the third-layer beam the same as that of the first-layer beam; S5, installing a tail-section supporting column, a backwards counted second-layer beam and a top-layer beam, specifically, making the disconnecting positions of the backwards counted second-layer beam and the top-layer beam with the core tube opposite to the disconnecting positions of one adjacent lower-layer beam and the backwards counted second-layer beam, respectively; and S6, welding the disconnected position of a steel beam and the core tube. The construction method has the advantages of high construction efficiency and cost saving.

Description

technical field [0001] The invention relates to the technical field of steel structure construction, in particular to a staggered-level installation method for a long-span steel structure corridor. Background technique [0002] Currently, refer to figure 1 , in the installation of large-span steel structures, the installation method of conventional steel structures is that the structure is installed layer by layer and finally closed, that is, one end of the steel beam 2 is fixed to the corbel on the core tube 1 on one side of the steel beam 2, The other end is disconnected from the core tube 1 on the other side of the steel beam 2, and the disconnected position of each layer of steel beam 2 and core tube 1 is located on the same side, and the lower end of the steel beam 2 is provided with a support frame 3 to support the steel beam 2. In this method, since the support frame 3 bears all the weight of the steel beam 2, multiple support frames 3 need to be provided, and the su...

AI Technical Summary

Problems solved by technology

In this method, since the support frame 3 bears all the weight of the steel beam 2, multiple support frames 3 need to be provided, and the support frame foundation is strong enough to support the entire structure. When the structure is closed, the closing temperature required by the design must be reached. Subsequent work cannot be performed before collapse

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