Cast-in-situ section steel concrete cavity building roof

Abstract

The invention relates to a structure of a hollow floor system of cast-in-site steel-concrete in architectural engineering. The structure adopts the technical proposal that a special communicating hole for a common rib at the bottom part of a ribbon strip is manufactured in a web of section steel; the reinforcing steel bar at the bottom part of the ribbon strip penetrates through the communicating hole of the web of the section steel; the upper part penetrates through the upper flange of the section steel; a grid with the size of a crisscrossed prefabricated hollow body is formed; a hollowed hollow body is placed into the grid; and then concrete and mortar are poured into the hollow body, thereby the upper flange and the web of the section steel form into a whole with the entire floor system. By adopting the proposal, the reinforced concrete can be in close contact with the section steel, ans the bearing effect of the floor system is better. A plurality of raised arcs are formed on the bottom surface of the hollow body in the proposal, therefore, during the process of pouring the concrete and the mortar, the mortar can enter the bottom surface of the hollow body, the lower flange plate of the floor system forms a smooth surface after being solidified, and the problem that the secondary processing is still required to be performed to the bottom surface in the prior art can be overcome.

Description

technical field [0001] The invention relates to a building structure, in particular to a building construction with a cast-in-place concrete cavity floor covering containing section steel. Background technique [0002] At present, the construction of buildings on the building basically adopts cast-in-place reinforced concrete structure, steel structure, steel concrete structure, steel tube concrete structure, cast-in-place reinforced concrete hollow floor and cast-in-place reinforced concrete hollow floor, etc. In recent years, steel structures And the steel-concrete structural system is developing rapidly. The current method is mainly to use steel as the skeleton, and use profiled steel plates to replace part of the tensile structural steel bars and floor formwork. This method has better toughness and bearing capacity than reinforced concrete. However, the profiled steel plate must be placed on the upper flange of the profiled steel beam. The usual tensile reinforcement is ...

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Problems solved by technology

However, the profiled steel plate must be placed on the upper flange of the profiled steel beam. The usual tensile reinforcement is constrained by the profiled steel web and can only be arranged on the upper flange of the profiled steel. The contact surface of the cast-in-place reinforced concrete on the profiled steel is small. , To prevent displacement, welding cylinder head bolts are required for positioning, especially the exposed parts of steel webs and upper and lower flanges need to be protected by fire-resistant coatings, the construction cost is high, and the sound insulation of the floor is poor

[0003] Publication number is that the patent of CN1310276A discloses a kind of, lay profiled steel plate on profile steel, make hollow floor again on profiled steel plate, this way makes the load-bearing capacity of floor cover big, but the floor cover its built up like this There are also protruding steel sections, and the top of the steel sections must be coated with fireproof materials. The addition of profiled steel plates increases the cost, and also increases the difficulty and expense of later decoration. This structure also indirectly increases the height of the entire building. , but the usable height has not increased, so the structure is not decorated and affects the appearance

[0004] The patent of Publication No. CN1766252A discloses a profiled steel web protruding from the profiled steel upper flange. The degree of bonding between the cover and the section steel, but this method makes the section steel into a movable connection, and its production and installation will take more time and cost

Moreover, existing products cannot be applied, and the lower flange of the section steel still protrudes from the lower flange surface of the floor

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