CN204059761U - A kind of steel pipe inner wall arranges the hollow steel pipe concrete column of rubber bound layer - Google Patents

Abstract

The utility model relates to a hollow steel pipe concrete column with a rubber bonding layer arranged on the inner wall of a steel pipe. A rubber bonding layer is provided between the inner wall of the steel pipe and the concrete, and the rubber bonding layer is bonded to the inner wall of the steel pipe. The rubber bonding layer of the utility model has good elasticity and durability, and has good adhesion to metal and non-metal materials, especially the mutual bonding of different materials. In the utility model, the rubber adhesive layer is directly adhered to the inner wall of the steel pipe, and it is bonded immediately upon contact without long-time pressurization, and can be cured at outdoor temperature, and then the concrete can be poured into the steel pipe by centrifugal method. The rubber bonding layer is soft, resistant to shock and vibration, and its function is similar to the rubber bearing in the bridge, which plays the role of force transmission, and does not hinder the triaxial stress state of the concrete, and maintains the original tightness of the steel pipe to the concrete. And it can adapt to the deformation of concrete due to self-shrinkage, cold shrinkage, and expansion, and play a buffer role, thereby strengthening the bonding effect of the interface between the steel pipe and the concrete.

Description

A hollow steel tube concrete column with a rubber bonded layer on the inner wall of the steel tube

technical field

The utility model relates to a steel pipe concrete column, in particular to a hollow steel pipe concrete column with a rubber bonding layer on the inner wall of the steel pipe, which belongs to the innovative technology of the steel pipe concrete column.

Background technique

Concrete-filled steel tubes are components formed by filling concrete into steel tubes. According to the different production, it can be divided into solid steel pipe concrete and hollow steel pipe concrete. The confinement effect of the inner and outer steel pipes on the core concrete of CFST makes the concrete in a state of triaxial stress, thereby improving the strength, plasticity and other mechanical properties of the concrete. The steel pipe is wrapped outside the concrete, and the problem of longitudinal cracks on the concrete surface is solved, which prolongs the service life and reduces maintenance, improves the impact resistance, and reduces the damage rate in lifting, transportation and installation engineering. In the production process, it can effectively avoid problems such as pulp running and pitting, and basically there is no problem of scrap rate. The hollow concrete-filled steel tube structure has many advantages over the concrete-filled steel tube structure. It avoids the high-altitude pouring of concrete on site and can reduce the amount of concrete. Due to the factory production of components, the concrete forming and curing conditions are superior, and the quality is stable and reliable. Various pipelines can be arranged in the hollow part, saving space and reduce weight. Steel pipe recycled concrete columns have broad application prospects in industry and construction, and have always been the focus of people's research. However, the first type of cavities caused by debonding of CFST structures in actual engineering are ubiquitous. The development of this material technology with wide application prospects is greatly restricted, and it is difficult to apply it in the engineering of long-span structures.

Contents of the invention

In order to solve the problems in the prior art, the utility model provides a hollow steel tube concrete column with a rubber bonding layer on the inner wall of the steel tube, which can strengthen the cohesive force between the steel tube and the concrete. The utility model is reasonable in design, convenient and practical.

The technical scheme of the utility model is: the steel tube inner wall of the utility model is provided with a hollow steel tube concrete column with a rubber bonding layer, the hollow cavity of the steel tube is filled with concrete, and a rubber bonding layer is arranged between the inner wall of the steel tube and the concrete, The rubber bonding layer is bonded on the inner wall of the steel pipe.

The beneficial effects of the utility model are: the utility model bonds the rubber bonding layer on the inner wall of the steel pipe, and the rubber bonding layer has good elastic strength and good durability. It can be cured at outdoor temperature and has sufficient bond strength immediately after bonding. It can strengthen the bonding effect between concrete and steel pipe, and to a certain extent, can alleviate the problem of the gap between concrete and steel pipe, so that the steel pipe can provide the clamping force for the concrete without being affected by the rubber bonding layer; in addition, the rubber adhesive The knot layer has a strong cohesive force, which can improve the cohesive force between the steel pipe and the concrete, so that the steel pipe and the concrete are closely combined. The utility model relates to a hollow steel pipe concrete column with a rubber bonding layer on the inner wall of the steel pipe

Description of drawings

Fig. 1 is a schematic cross-sectional view of the utility model;

Fig. 2 is a perspective view of the utility model.

Detailed ways

The utility model will be further described in detail below in conjunction with the examples, but the implementation of the utility model is not limited thereto.

Example:

As shown in Figure 1, the steel pipe inner wall of the utility model is provided with a hollow steel pipe concrete column with a rubber bonding layer. The knot layer 2 and the rubber bonding layer 2 are bonded on the inner wall 2 of the steel pipe 1 .

Above-mentioned concrete 4 is hollow concrete 4, or is solid concrete. In this embodiment, the concrete 4 is hollow concrete with a hollow cavity 5 . The hollow lumen of the above-mentioned steel pipe 1 is poured with hollow concrete 4 by centrifugal method, and is made by steam curing. The concrete is hollow, which saves the amount of cement.

In this embodiment, the above-mentioned rubber bonding layer 3 is a heat-resistant neoprene composite material layer.

The concrete 4 above can be ordinary concrete or recycled concrete. In this embodiment, the above-mentioned concrete 4 is recycled concrete.

In this embodiment, the outline shape of the steel pipe 1 is circular.

When the above-mentioned rubber adhesive layer 2 is bonded to the inner wall 2 of the steel pipe 1, it can be solidified at an outdoor temperature without long-term pressurization and can be bonded immediately upon contact after the glue is applied and left to air. Therefore, the rubber bonding layer 2 and the steel pipe 1 form an integral body. The rubber bonding layer 2 can strengthen the cohesive force between the concrete 4 and the steel pipe 1, and relieve voiding.

The above-mentioned rubber bonding layer 3 adopts a heat-resistant neoprene composite material layer, which is easy to cure, has good elasticity and strong durability. It can also prevent the adverse effect of concrete hydration heat on rubber materials.

The steel pipe described in the utility model can be mass-produced in the manufacturing plant according to the requirements. The thickness of the rubber bonding layer 3 is about 0.5-1.4mm, and the size of the steel pipe is D×L×t (diameter×length×thickness). Functional requirements design its structural dimensions.

The utility model adopts the centrifugal method to pour the concrete after the steel pipe attached with the rubber bonding layer is prepared, and can also be prefabricated in a factory without pouring the concrete on site. After the hollow concrete is poured, it is transported to the site for installation. In view of the good elasticity of the neoprene material, under the limitation of the steel pipe, the shrinkage and expansion of the concrete during the hardening and strength development process are all within the tolerable range and will not have an excessive impact on it.

Under the action of axial pressure on the hollow concrete-filled steel tube column, the steel tube 1 provides circumferential restraint to the concrete 4 inside, and the rubber bonding layer 3 acts as a force transmission function similar to the rubber bearing of a bridge, so that the concrete 4 inside is in the Three-way compression state, does not affect the strength.

The hollow steel pipe concrete column provided by the utility model with a rubber bonding layer on the inner wall of the steel pipe has the following advantages:

1) The rubber bonding layer 2 is made of heat-resistant neoprene composite material layer, which has high bonding strength and good adhesion to metals and non-metals, especially for the mutual bonding between different materials , and has good elasticity, not affected by the deformation caused by concrete shrinkage and expansion, and can also prevent the loss of bonding effect of the thin rubber layer caused by the heat release of concrete hydration.

2) The inner wall of the steel pipe is bonded with the rubber bonding layer 3, which not only does not affect the binding force between the steel pipe and the concrete, but also strengthens the bonding force between the steel pipe 1 and the concrete 4 to prevent the problem of voiding.

The utility model can be used as a pressure component, and can be applied to prefabricated components for power transmission and transformation, factory buildings, etc.

Claims (5)

1. steel pipe inner wall arranges a hollow steel pipe concrete column for rubber bound layer, is filled with concrete in the hollow tube chamber of steel pipe, and it is characterized in that being provided with rubber bound layer between the inwall of steel pipe and concrete, rubber bound layer is bonded on the inwall of steel pipe.

2. the hollow steel pipe concrete column of rubber bound layer is set according to the steel pipe inner wall described in claim 1, it is characterized in that above-mentioned concrete is hollow concrete, or be solid concrete.

3. the hollow steel pipe concrete column of rubber bound layer is set according to the steel pipe inner wall described in claim 1, it is characterized in that above-mentioned rubber bound layer is heat resistant type neoprene composite layer.

4. the hollow steel pipe concrete column of rubber bound layer is set according to the steel pipe inner wall described in claim 1, it is characterized in that above-mentioned concrete is regeneration concrete.

5. the steel pipe inner wall according to any one of Claims 1-4 arranges the hollow steel pipe concrete column of rubber bound layer, it is characterized in that the appearance profile shape of above-mentioned steel pipe is for circular.