CN202370171U

CN202370171U - Steel pipe concrete column filled with marine sand concrete

Info

Publication number: CN202370171U
Application number: CN2011202833505U
Authority: CN
Inventors: 查晓雄; 李�杰
Original assignee: Shenzhen Graduate School Harbin Institute of Technology
Current assignee: Shenzhen Graduate School Harbin Institute of Technology
Priority date: 2011-08-05
Filing date: 2011-08-05
Publication date: 2012-08-08
Anticipated expiration: 2021-08-05

Abstract

The utility model relates to a steel pipe concrete column filled with marine sand concrete. Marine sand is not required to be specially treated, protective layers are not required to be arranged in the marine sand concrete and a steel pipe, the marine sand concrete is directly poured into the steel pipe to form the steel pipe concrete column, and a sealing assembly for sealing the concrete is arranged at each of two ends of the steel pipe. According to the steel pipe concrete column filled with the marine sand concrete, the marine sand is fully utilized, a large quantity of manpower and material resource costs are reduced, and the traditional misunderstanding that the marine sand corrodes the steel pipe and is required to be isolated during manufacturing of the steel pipe concrete column is broken.

Description

In fill out the steel core concrete column of marine sand concrete

Technical field

The utility model relates to a kind of steel core concrete column, relates in particular to the steel core concrete column of filling out marine sand concrete in a kind of.

Background technology

Because extra large sand is corrosive to reinforcing bar, require usually before using extra large sand, need handle, make it reach the building instructions for use.Usually the processing method to extra large sand has beach accretion method and fresh water douche, can waste a large amount of energy resources and increase cost.And steel core concrete column can be applied to a lot of industries; Like metallurgical industry, power industry, shipbuilding industry, machinery manufacturing industry and industry or civilian construction etc., can be used for boiler component and post, single or multiple lift industrial premises, high level or superelevation layer civilian construction and the structures such as highway and city arch bridge of sending power transformation framework, mounting shop.When employing marine sand concrete of the prior art forms steel core concrete column, river sand layer or FRP are set within extra large sand and steel pipe inwall usually manage etc. and to prevent that extra large sand from directly corroding steel pipe, and then utilize extra large sand to load.This method need not carried out desalting processing to it, can utilize extra large sand, has solved the general deficient difficult problem of coastal area standard sand and stone resources, has avoided the exploitation supply of long-range sandstone material.But these methods can run into some problems in actual process, between steel pipe and marine sand concrete layer, the river sand layer being set, often need complicated technology and lot of manpower and material resources; And adopt the FRP pipe to isolate extra large sand and steel pipe walls, often need increase wide variety of materials cost and manpower and materials.

The utility model content

The technical problem that the utility model solves is: makes up the steel core concrete column of filling out marine sand concrete in a kind of, overcome the technical problem of a large amount of extra costs of prior art needs.

The technical scheme of the utility model is: make up the steel core concrete column of filling out marine sand concrete in a kind of; Comprise the marine sand concrete that holds concrete steel pipe, forms by extra large sand and water, cement mixing; Marine sand concrete directly is filled in the said steel pipe forms steel core concrete column, said steel pipe two ends are provided with the concrete black box of sealing.

The further technical scheme of the utility model is: said black box is a sealing plate.

The technique effect of the utility model is: the steel core concrete column of filling out marine sand concrete in the utility model is a kind of; Need not handle especially extra large sand; Need within marine sand concrete and steel pipe, overcoat be set yet; Directly marine sand concrete is filled in the said steel pipe and forms steel core concrete column, said steel pipe two ends are provided with the concrete black box of sealing.The steel core concrete column of filling out marine sand concrete in the utility model had both made full use of extra large sand, had practiced thrift the lot of manpower and material resources cost again, had broken the mistaken ideas of thinking extra large sand corrosion steel pipe traditionally and needing the extra large sand steel core concrete column of isolation making simultaneously.

Description of drawings

Fig. 1 is the structural representation of the utility model.

The sketch map that Fig. 2 is corroded for steel pipe in the sand concrete filled steel tube of the utility model sea

The specific embodiment

Below in conjunction with specific embodiment, the utility model technical scheme is further specified.

As shown in Figure 1; The specific embodiment of the utility model is: make up the steel core concrete column of filling out marine sand concrete in a kind of; Comprise the marine sand concrete 2 that holds concrete steel pipe 1, forms by extra large sand and water, cement mixing; It is characterized in that, marine sand concrete 2 directly is filled in the said steel pipe 1 forms steel core concrete column that said steel pipe 1 two ends are provided with the concrete black box 3 of sealing.

Here prove absolutely for following 2:

One, the condition of extra large sand corrosion steel pipe:

Sea sand corrosion steel pipe is to corrode steel pipe owing to the chlorion in the extra large sand can produce chemical reaction with steel pipe under certain condition.Concrete corrosion process is following:

The iron-based body forms the anode region reaction as anode, and the reactive ion equation is:

Passivating film 4 forms the cathodic region reaction as negative electrode, and the reactive ion equation is:

The product generative process:

Then further form iron rust again with water and combination with oxygen:

Thus, draw concrete reinforcing steel generation corrosion three necessary conditions arranged:

(1) there is potential difference in rebar surface;

(2) passivating film of rebar surface is destroyed, and the iron-based body exposes out and is in the state of activation;

(3) keep corrosion reaction at rebar surface and carry out necessary moisture and oxygen.

Two, in the utility model technical scheme in fill out the steel core concrete column of marine sand concrete, lack above-mentioned in must condition the 3rd.

As shown in Figure 2; Steel core concrete column is after formation; Inside has just formed a complete airtight environment, and the oxygen G&W is consumed gradually in forming process, and can not get extraneous replenishing in the steel core concrete column; Corrosion reaction is not because the satisfying of the 3rd necessary condition so, and reaction will reduce along with the minimizing of the content of oxygen G&W in the concrete filled steel tube.In the use, the small reaction of this point can be ignored after interior steel core concrete column forming process of filling out marine sand concrete reaches, and the steel core concrete column that can internally not fill out marine sand concrete impacts.Therefore, the steel core concrete column of filling out marine sand concrete in adopting that this method forms is safe and reliable.

Above content is the further explain that combines concrete preferred implementation that the utility model is done, and can not assert that the practical implementation of the utility model is confined to these explanations.For the those of ordinary skill of technical field under the utility model, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be regarded as belonging to the protection domain of the utility model.

Claims

1. fill out the steel core concrete column of marine sand concrete in one kind; It is characterized in that, comprise and hold concrete steel pipe, marine sand concrete, it is characterized in that; Marine sand concrete directly is filled in the said steel pipe forms steel core concrete column, said steel pipe two ends are provided with the concrete black box of sealing.

2. fill out the steel core concrete column of marine sand concrete according to claim 1 in said, it is characterized in that said black box is a sealing plate.