Roll-on/slide-off mounting method of large steel structure truss

Abstract

The invention relates to the field of on-site preparation, carrying or machining of building materials or building components, in particular to a roll-on / slide-off mounting method of a large steel structure truss. The roll-on / slide-off mounting method of the large steel structure truss comprises the steps that a steel truss (11) and a steel column (12) are welded to form a truss component (1), a first column foot plate (13) is fixed to the bottom end of the steel column (12), and the roll-on / slide-off mounting method is characterized by sequentially comprising the following steps that 1, at least four embedded bolts (3) are vertically mounted in the top face of a concrete column (2); 2, a second column foot plate (14) is laid on a secondary grouting layer (22) on the top face of the concrete column (2); 3, the truss column component (1) slides to the second column foot plate (14) through the first column foot plate (13) at the bottom end of the steel column (12); and 4, each truss column component (1) is mounted in a sliding mode one by one according to the steps 1-3. The roll-on / slide-off mounting method is convenient to construct, safe and reliable.

Description

technical field [0001] The invention relates to the field of on-site preparation, handling or processing of building materials or building components, in particular to a roll-on / slip installation method for large-scale steel structure trusses. Background technique [0002] Nowadays, more and more industrial plants adopt steel truss roofs, which are designed and constructed in the form of pre-embedded bolts on the top of concrete columns, steel columns and steel trusses connected as a whole, and steel structure column foot plates with shear keys installed on the top of concrete columns. . When installing steel structures, steel trusses are heavy in weight, large in span, long in length, and high in height. In some projects, the entire steel roof truss weighs tens of thousands of tons, with a span of 120m, a length of 300m, and many components. If the construction method of component installation is adopted, the construction period will be very long, and the amount of welding...

AI Technical Summary

Problems solved by technology

Therefore, the roll-on / slip method is often used for construction. For the steel column and column foot plate of this design structure installed on the concrete column top, when the roll-off / slip is used, the lifting height should be greater than the pre-embedded bolts beyond the concrete column top. and the total height of the shear key, the unsafe factor is great

[0003] If the shear keys and bolt holes are reserved on the top of the concrete column, firstly, it is inconvenient to reserve the stirrups and tie bars of the concrete column due to their density; secondly, even if the shear keys and bolt holes are reserved, the original design structure Change, the entire column top structure is relatively the weakest, and it is secondary grouting, the pre-embedded bolts have poor pull-out resistance, and there are also great unsafe factors

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