Steel ladle concrete beam additional steel plate cavity post-grouting fireproof structure and method thereof

Abstract

The invention discloses a steel ladle concrete beam additional steel plate cavity post-grouting fireproof structure and a method thereof. The steel ladle concrete beam additional steel plate cavity post-grouting fireproof structure comprises a structure beam wrapping steel plate, an additional steel plate, stainless steel bolts, a rubber pad, a reserved steel pipe, steel-wrapped beam inner cast-in-place concrete and a cement mortar layer. The steel ladle concrete beam additional steel plate cavity post-grouting fireproof structure has the beneficial effects that the additional steel plate and stressed channel steel are flexibly connected into a whole, and the additional steel plate and the channel steel can be integrally hoisted; the additional steel plate is flexibly connected with the stressed channel steel, and micro deformation in the steel ladle beam structure construction loading process cannot cause cavity deformation formed by the outer-layer additional steel plate; a mortar layer formed by additional cavity post-grouting can achieve the anti-corrosion, anti-rust and fireproof protection functions on the stressed channel steel, and the stability and durability are better; and the later maintenance is simplified and the maintenance cost is low.

Description

technical field [0001] The invention relates to a steel-clad concrete beam structure anti-corrosion, anti-rust, fire prevention and assembly comprehensive technology, in particular to a steel-clad concrete beam with a steel plate cavity and a grouting fire prevention structure and a method thereof, which belong to the technical field of construction engineering applications. Background technique [0002] In the existing building construction process, on the basis of anti-corrosion and anti-rust on the surface of the steel-clad beam structure, thick-coated fire-resistant paint is also applied to improve the fire-proof performance of the overall structure, or board-based fire-proof materials such as calcium silicate boards are externally attached. However, The following problems exist in the construction of steel-clad beam structures in the existing fire prevention practices: [0003] 1) The efficiency of assembly is low, because during the overall pouring process, the outsour...

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Problems solved by technology

[0003] 1) The efficiency of assembly is low, because during the overall pouring process, the outsourcing concrete channel steel has a large deformation. If the above method is done in advance, it will be damaged due to deformation, so the fireproof layer and structural channel shape cannot be prepared in advance Steel integrated hoisting can only be carried out after the structural construction is completed, which requires high-altitude operations and a low degree of assembly;

[0004] 2) Thin-coated fireproof materials are only used for fire protection requirements below the second grade. The thick-coated fireproof coating or calcium silicate fireproof board after the test can meet the first-grade fireproof requirements, but the surface appearance is not good. Under the stress deformation and fire baking, it is easy to crack and fall off

Therefore, the existing methods have poor durability, and there are safety risks when cracking and falling off at high altitudes, and the fire performance is also difficult to guarantee, so it should be used with caution for structures with the first-level fire protection level;

[0005] 3) Since there is no corresponding technology and acceptance criteria for external fire protection of steel-clad beam structures, the specific use needs to be based on corresponding tests and expert demonstrations;

Later maintenance costs are higher

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