CN201406796Y - Hollow square column of casing type concrete filled steel pipe - Google Patents

Abstract

The utility model discloses a sleeve type steel pipe concrete hollow square column, which is characterized in that a coaxial inner pipe is sleeved in the square steel pipe concrete with a solid composite structure, and no concrete is arranged in the inner pipe, so that a hollow composite structure is formed. The utility model has the advantages that: (1) the self-weight of the column is further reduced, and the stability of the compression bar of the column is improved; and (2) the column can also be used as a threading pipe for construction or a drain pipe in buildings.

Description

Sleeve type steel pipe concrete hollow square column

Technical field

The application relates to building structure.

Background technology:

Existing concrete filled steel tube square column is to water full concrete in rectangular steel tube, form the solid composite structure, it has utilized the high strength of steel pipe, come the side of confined concrete, effect is looked about in formation, improve the compressive strength of concrete column greatly, make the brittle fracture of structure become ductile failure, improved the safety of structure.It is compared with reinforced concrete post, and the pillar cross dimension can significantly be dwindled, thereby alleviates the deadweight of pillar, improves the usage space of building.But pillar can not be too elongated, to guarantee pressurized stability.When pillar is very high, just suitably overstriking, this has just increased dead load, need address this problem.

Summary of the invention

The design's purpose is the strut stability that guarantees square long column, alleviates the pillar deadweight simultaneously.Its scheme is that the concrete filled steel tube square column with solid composite structure is made hollow compound structural, and the core concrete that is about to the concrete filled steel tube square column removes, with pipe (being called interior pipe) replacement, form hollow, sleeve type steel pipe concrete hollow square column.The structure of sleeve type steel pipe concrete hollow square column is divided into three layers, and skin is a square steel pipe, is called outer tube, and internal layer is square tube or pipe, is called interior pipe, and the intermediate layer is a concrete, in order to avoid vibration concrete is best.Outer tube and interior pipe are coaxial.That is to say that sleeve type steel pipe concrete hollow square column is exactly to water full concrete between coaxial inner and outer pipes, outer tube is a steel pipe, and interior pipe can be pipelines such as steel pipe, PVC-U pipe, steel-plastics composite pipe.

Good effect of the present utility model is:

(1) further reduces the deadweight of pillar, improved the strut stability of pillar;

(2) pillar can doublely be done building penetration pipe or building internal drainage pipe.

Description of drawings

Fig. 1 is the sleeve type steel pipe concrete hollow square column schematic diagram, among the figure: 1---and outer tube; 2---exempt from vibration concrete; 3---interior pipe.

The specific embodiment

As shown in Figure 1, interior pipe 3 is inserted in the middle of the outer tube 1 earlier, with the fixing interior pipe of rigid plastics clamp, pipe 3 keeps coaxial with outer tube 1 in making, and lifting is holded up then, and fixation, vibration concrete 2 is exempted from cast between outer tube 1 and interior pipe 3 again, last maintenance makes hardening of concrete, sleeve type steel pipe concrete hollow square column.

Claims (1)

1, sleeve type steel pipe concrete hollow square column is characterized in that overlapping in the rectangular steel tube concrete coaxial interior pipe, and interior pipe is hollow.

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