DE19803916A1 - Foundation for fixing structural elements made of steel - Google Patents

Abstract

The boundary surfaces between the steel and concrete in the zone being influenced by the atmosphere and measuring 10-50 cm are provided with bodies (3) which surround the steel, and are wholly or partially removable. After removal of these bodies the resultant hollow spaces are filled with a durably elastic material (4). The foundation is covered entirely or in the region of the structural element with a concrete (5) modified by plastics, and then coated with a crack-bridging paint (6).

Description

For fastening construction parts such as overhead line masts, masts in overhead line construction Steel profiles are used directly in the railway, for street lighting or traffic lights Embedded concrete foundations. At the interfaces exposed to the influence of the atmosphere of concrete and steel there are signs of corrosion on the embedded steel parts and a destruction of the concrete, the stability and reliability of the anchorage of the Endanger construction in the ground.

Steel profiles for high-rise buildings are often attached to the ground by sleeve foundations. For this purpose, holes of the appropriate diameter and required depth are machined into the Soil introduced and provided with a steel jacket. That or the corresponding steel profiles are then fixed in these steel sleeves using concrete. In the sphere of influence of Here, too, there are signs of corrosion at the concrete interfaces and steel on both the sleeve and the embedded structural parts.

From DE-PS 37 18 169 is known a concrete foundation and steel profiles embedded therein by means of a base which is segmented radially to the steel profile and whose Joints between the individual segments as well as between steel and concrete foundations and the base are filled with a moisture-proof, flexible material, against Kor To protect rosion, the filling is an age-resistant and rot-free plastic with good adhesive and adhesive properties, root resistance and resistance to Is UV radiation and consists essentially of tar polyurethane. This segmented, on the The base, which is placed on the foundation, has little resistance to destructive mechanical ones Actions. Because such constructions are often used on agricultural land are built, they are involuntary to the mechanical action of agricultural Ge councils exposed. These effects have already occurred with conventional monolithic concrete foundations of considerable damage. One of these leads to the segmented base term mechanical action to separate the joints and thus to lose the spac visible protection of the foundation.

From DE-GM 72 20 039 is known the mast base with a sleeve made of cardboard, plastic or To provide sheet metal, wherein the sleeve has a bottom and the mast base at a distance of 3-4 cm and in the required length in the concrete foundation. The hollow thus formed space around the mast base is made of a corrosion-protecting and dielectric material fills. Such a separation of the entire mast foot from the concrete foundation also causes the  Loss of direct binding of mast and concrete foundation and thus a reduction in Forces that can be transferred from the mast to the foundation.

The object of the invention is now the interfaces between structural parts and to protect concrete in the area of the atmosphere from corrosion and also in case of Corrosion damaged fastenings subsequently ensure this protection without the Power transmission from the construction parts to the concrete foundation significantly influenced sen.

According to the invention the object is achieved in that a concrete foundation for attachment of structural parts at the interfaces of steel and concrete in the area of influence of the atmosphere sphere in the range of 10-50 cm remove one or all or part of the steel baren substance and the cavity created after removal of this substance with egg nem permanently elastic material is filled and that the foundation completely or only in the area of Construction part covered with a plastic-modified concrete and with a crack-bridging Painting is provided.

The invention is illustrated below using an exemplary embodiment. The fig manure shows a section through a sleeve foundation.

An introduced into the soil sleeve 1 is filled with concrete and encloses a con struction part 2nd At the upper end of the sleeve 1 and at the same level with it, the sleeve 1 and the structural part 2 are encased with a removable body 3 made of, for example, Styrofoam, and the cavity formed after removal of this enveloping body is filled with a permanently elastic material 4 , for example tar polyurethane, and the uppermost area the foundation is completely covered with a plast-modified concrete 5 and this is provided with a crack-covering paint 6 .

Reference list

1

Sleeve

2nd

Construction part

3rd

removable body

4th

permanently elastic fabric

5

plast modified concrete

6

crack-bridging paint

Claims (2)

1. Foundation for fastening structural parts made of steel, characterized in that the interfaces between steel and concrete in the area of influence of the atmosphere in the loading area of 10-50 cm are wholly or partly removable and enclose the steel body ( 3 ) and after Remove this body, fill the cavities with a permanently elastic material ( 4 ), and cover the foundation entirely or only in the area of the construction with a plastically modified concrete (PCC) ( 5 ) and coat the paint ( 6 ) . 2. Foundation according to claim 1, characterized in that in existing and at the interfaces between the structural part and concrete corrosion phenomena having foundations after the removal of the corrosion products in the atmosphere ent cavities alone filled with a permanently elastic material in combination with a plastically modified concrete and that the uppermost area of the foundation consists of a layer of PCC ( 5 ) and a crack-bridging paint ( 6 ).