EP4223938A1 - Mushroom like shaped foundation - Google Patents

Abstract

The invention relates to a mushroom foundation (1) for overhead power line pylons, having a mushroom base (4) and a mushroom shaft (6), the mushroom base (4) having a mushroom base plate (10) with stiffening elements (9) and a central shaft joint (8) for receiving a lower end of the mushroom shank (6) and wherein the mushroom shank (6) is connected at an upper end to a connecting element (7) which is designed to be connectable to the overhead power line pylon.

Description

The invention relates to a mushroom foundation for pylons.

Transmission towers are usually founded on concrete foundations. In certain constellations it is necessary to get such a mast site free. For this purpose, support poles or guy poles are anchored or founded with temporary foundations. According to the state of the art, this is done by means of an anchor, which usually has to be installed in open terrain with a corresponding distance. For example, using concrete foundations, which is very expensive and destroys nature. Even after these temporary foundations have been dismantled, damage will remain.

Various foundations made of concrete are known in the prior art.
From the DE 10 2007 018 335 B4 shows, for example, a foundation for a mast, which has a foundation plate made of concrete with screw bolts embedded in concrete and protruding from the top and an attachment with a recess for receiving the mast foot. The top has on the circumference at the lower end to the outside open mounting recesses, in each of which a mounting insert is concreted, which is anchored with a reinforcement in the top and provided with a section through which the bolt on the foundation plate can be inserted to with to fasten the attachment to the base plate with a nut inserted into the mounting recess and screwed onto the screw bolt.

Also from the U.S. 5,218,805 A a foundation for a mast with a foundation plate with screw bolts cast in concrete and protruding from the top is known. The foundation comprises an attachment which has mounting recesses which are open towards the outside on the circumference at the lower end.

A temporary foundation is in the DE 100 19 177 A1 described for a mobile fence base, with a base, with an upper side arranged opposite the base, with at least one device for receiving a mobile fence element and with at least one recess for lifting the mobile fence base.

In the FR 2 918 400 A1 a stackable ballast to stabilize building components or vertical formwork is described as a provisional solution.

The GB 1 155 238 A discloses a ground anchor structure and in which FR 2 936 540 A1 describes a base module for the construction of a fence.

A disadvantage of concrete foundations and in particular of temporary concrete foundations is that a great deal of effort is required to set up the foundations and to remove them again without harming the environment when the temporary solution is dismantled. In the case of the known foundations and devices, this leads to a considerable space requirement and to the cause of large-scale crop damage.

The object of the invention is now to provide a mushroom foundation as a temporary foundation in order to temporarily clear the old mast location of an overhead power line pylon and to reduce crop damage in this context.

The object is achieved by an object with the features according to patent claim 1. Further training courses are in the dependent patent claims specified.

The object of the invention is achieved in particular by a mushroom foundation for overhead line pylons, which essentially consists of a mushroom base and a mushroom shaft. The mushroom base has a mushroom base plate with stiffening elements and also has a central shaft joint for receiving a lower end of the mushroom shaft. At its upper end, the mushroom shaft has a connection option with a connection element which connects the mushroom shaft to the transmission line pylon.

The connecting element is particularly preferably designed as a connecting plate and is designed to be temporarily connectable to the foot frame construction and a corner post of the overhead power line pylon.

Furthermore, the connection element is advantageously designed so that it can be temporarily connected to the mushroom shaft.

Alternatively, the connection element is designed as part of the mushroom shaft.

The invention is carried out particularly advantageously when the connection element is connected to the foot frame construction and the corner post of the overhead line mast and to the mushroom shaft via screw connections.

The stiffening element advantageously protrudes perpendicularly from the mushroom base plate. A plurality of stiffening elements are preferably formed in order to stiffen the mushroom base plate over the entire surface.

The stiffening elements themselves are advantageously designed as profiles and are connected to the mushroom base plate.

Are advantageously formed by the upwardly aligned stiffening elements on the mushroom base plate open at the top, which in the filling of Foundation pit Take up soil or weighting elements to increase the stability of the mushroom foundation.

The mushroom base itself is advantageously formed from L-profiles, one leg of the L-profile forming the mushroom base plate and one leg of the L-profile forming the stiffening element.

The mushroom foundation is preferably made of steel.

It is particularly advantageous for the mushroom foundations to be galvanized and appropriately coated so that they are not susceptible to corrosion. In this application, there is the possibility of using the mushroom foundations not just as a temporary solution, but as a permanent foundation variant.

The additional stiffening elements are advantageously arranged on the mushroom base plate and welded to it.

The lower end of the mushroom shaft is advantageously screwed to the shaft joint of the mushroom base.

The shaft joint preferably consists of two L-profiles projecting perpendicularly from the mushroom base plate.

The mushroom shaft is particularly preferably designed as a cross profile corresponding to the L-profile of the shaft joint.

The cross profile of the mushroom shaft consists of two L-profiles welded together at their corners.

The advantages of the mushroom foundation according to the invention are manifold.

The foundations according to the invention enable maintenance-free use and can be produced at reduced costs compared to concrete foundations.

It is particularly advantageous that less installation effort is required and the foundations are secure.

The use of the mushroom foundations as temporary foundations only affects the ground in the immediate vicinity of the old tree branch and does not cause any damage to the ground outside of the existing route.

A decisive advantage is the reduction in crop damage through the use of the foundations according to the invention, which can also be produced more cost-effectively, are easily transportable and can be used multiple times.

Furthermore, the mushroom foundations can be easily adapted to different mast types using the connection elements and are also easy to calculate statically. In connection with this, there is a good verifiability of the stability as well as the static requirements, which can be verified with the usual and established calculation methods.

A particular advantage of mushroom foundations is that they can be reused, so that the effort required to produce the foundations is inexpensive compared to other types of provisional arrangement of guy poles.

The temporary mushroom foundations are maintenance-free over a longer period of time, depending on the risk of steel corrosion of the soil and groundwater at the place of use, for short-term to medium-term temporary use, and in terms of statics they represent a 1:1 replacement of the existing foundations of the mast without complex calculations and verifications In contrast to this, mast anchoring according to the prior art is generally subject to a high subsequent control effort, for example with regard to the anchor prestressing, and a large additional space requirement.

Furthermore, the temporary mushroom foundations are basically after appropriate Dimensioning can be used for all variants of existing foundations with a vertical foot anchor entry or at least can be adapted with minimal effort. There is also an adaptability to sloping foundation entrances. Here, the adjustment effort is somewhat greater, but it is fundamentally possible and still lower in comparison with solutions based on the prior art.

Fig. 1:

Seitenansicht unterer Bereich eines Freileitungsmastes mit Pilzfundamenten,

Fig. 2:

perspektivische Darstellung eines Pilzfundamentes,

Fig. 3:

Draufsicht auf einen Pilzfundamentfuß und

Fig. 4:

Detail des Schaftstoßes eines Pilzfundamentfußes.

Further details, features and advantages of embodiments of the invention result from the following description of exemplary embodiments with reference to the accompanying drawings. Show it:

Figure 1:

Side view of the lower area of an overhead power line pylon with mushroom foundations,

Figure 2:

perspective view of a mushroom foundation,

Figure 3:

Top view of a mushroom foundation foot and

Figure 4:

Detail of the shank joint of a mushroom footing.

In figure 1 the lower part of an overhead line pylon with mushroom foundations 1 is shown in a side view. Two corner posts 2 of the pylon are shown in this view, which are connected to each other and to a mushroom foundation 1 via a base frame construction 3 of the pylon.

In principle, the upper edge of the terrain 5 is shown as a line up to which the mushroom foundations 1 are embedded in the ground.

The mushroom foundations 1 essentially consist of a mushroom shaft 6, analogous to a mushroom stalk, and a mushroom foot 4, analogous to a mushroom cap. The mushroom shaft 6 is shown shortened in length. The mushroom foundation 1 is thus, in analogy to a mushroom, buried with the mushroom base 4 down in the ground and the mushroom shaft 6 takes up the corner post 2 of the transmission line pylon at the end protruding from the ground.

In figure 2 a mushroom foundation 1 is shown in a perspective view. The Mushroom foundation 1 consisting of the mushroom shaft 6 and the mushroom base 4 is made of steel of conventional steel quality according to the present exemplary embodiment.

The mushroom shaft 6 is temporarily connected at its upper end via a connecting element 7 to the corner post 2 and to the foot frame structure 3 of the pylon. In the present case, screw connections are selected as the connecting means. The upper end of the mushroom shaft 6 is also connected to the connecting element 7 via screw connections. Due to the design of a connection element 7 as a separate part, the mushroom foundation 1 can be connected to different types of pylons by simply adapting the connection element 7 to the different types of masts, with possibly different distances for the connecting elements. The connection elements 7 are prefabricated for use with the respective mast type or can be flexibly adapted to the respective mast type from a blank on site.

The mushroom shaft 6 extends into the ground from the lower end of the mast foot. The mushroom foundation 1 represents, in the figurative sense, an inverted mushroom whose mushroom cap is surrounded by soil as the lower end of the foundation. For this purpose, the mushroom foundation 1 has a mushroom base 4 which, with the entire surface of its essentially horizontally extending mushroom base plate 10 and the soil above it, develops the foundation effect for the provisional anchoring of the transmission line pylon due to the load of the soil.

The horizontal surface of the mushroom base 4 is reinforced by stiffening elements 9 which protrude upwards from the mushroom base plate 10, also known as the mushroom plate. The mushroom base plate 10 is compartmentalized by the stiffening elements 9 and forms chamber-like recesses or receptacles which are open at the top and receive the soil. In special applications, 10 weighting elements and additional weights can be integrated into the mounts on the mushroom base plate.

The shaft joint 8 , which forms the receptacle for the mushroom shaft 6 , is arranged centrally in the mushroom foot 4 . The shaft joint 8 is formed from L-profiles which protrude upwards from the mushroom base plate 10 and to which the mushroom shaft 6 is screwed and firmly connected in the lower region. The mushroom foundation 1 can thus be easily dismantled into the mushroom base 4 and the mushroom shaft 6 for transport purposes.

The steel mushroom foot 4 absorbs the earth load and the foundation properties of the temporary mushroom foundation 1 can be flexibly adapted to the different mast types and their requirements via the size of the mushroom foot plate 10 and the mushroom shaft length. This means that a stable interim solution can be created as a temporary solution, which can be statically verified using conventional methods. Depending on the type of mast, defined foundation forces are required, which must be achieved and verified by the mushroom foundations 1 in each case.

In figure 3 a mushroom base 4 is shown in plan view with a section above the stiffening elements 9 through the cross profile of the mushroom shaft 6 and the L-profile of the shaft joint 8 .

The mushroom foot 4 consists of the mushroom foot plate 10 and the stiffening elements 9 attached upwards, which stiffen the mushroom foot plate 10 . The mushroom base plate 10 is flat on its underside and rests on the bottom of the foundation pit for the temporary foundation. In the top view, the mushroom base plate 10 has the stiffening elements 9 that protrude upwards and form chamber-like receptacles for soil or ballast elements on the upper side of the mushroom base plate 10 .

The mushroom base 4 itself is composed of individual L-profiles. The horizontal legs of the L-profiles form the mushroom base plate 10 and the vertical legs form the stiffening elements 9. Depending on the dimensioning of the mushroom base plate 10, additional stiffening elements 9 are welded onto the mushroom base plate 10 to the mushroom base plate 10 depending on the to stiffen static requirements.

In plan view, the mushroom base plate 10 is designed as a regular convex octagon. Two opposite L-profiles with the lower legs are welded to form a first main axis of a cross. This forms a U-profile. The second main axle is formed by attaching two axle pieces, which are also formed from opposite L-profiles and which extend away from the center of the octagon. The center of the cross is formed by stiffening elements 9 into a chamber with a square plan, which is shown in the detail view 4 is shown enlarged.

The areas of the mushroom base plate 10 between the main axes of the cross are in turn compartmentalized by stiffening elements 9, whereby on the one hand the mushroom base plate 10 is stiffened and on the other hand chamber-like receptacles open at the top for soil or weighting elements are formed.

In 4 the central area of the mushroom base 4 with the shaft joint 8 is shown enlarged in detail.

The center of the cross of the mushroom base plate 10 is shaped by stiffening elements 9 into a chamber with a square outline and forms the receptacle for the shaft joint 8. This is formed by two L-profiles, which are welded onto the mushroom base plate 10 with their L-shaped cross section. The L-profiles are welded together at their corner edges and extend upwards from the mushroom base plate 10. The L-profiles of the shaft joint 8 have connection points for corresponding connection points of the lower region of the mushroom shaft 6. The shaft joint 8 is preferably connected to the mushroom shaft 6 by means of a screw connection. To transport the mushroom foundation 1, it is separated from the mushroom shaft 6 and mushroom base 4 at the connection point described, in order to be able to move the mushroom foundation more easily.

Reference List

1

mushroom foundation

2

corner post

3

foot frame construction

4

mushroom foot

5

ground level

6

mushroom stem

7

connection element

8th

shaft shock

9

stiffening element

10

mushroom footplate

Claims (17)

Mushroom foundation (1) for overhead line pylons, having a mushroom foot (4) and a mushroom shaft (6), the mushroom foot (4) having a mushroom foot plate (10) with stiffening elements (9) and a central shaft joint (8) for receiving a lower end of the mushroom shaft (6) and in that the mushroom shaft (6) is connected at an upper end to a connection element (7) which is designed to be connectable to the pylon. Mushroom foundation (1) according to Claim 1, characterized in that the connection element (7) is designed as a connection plate and is designed so that it can be temporarily connected to a base frame construction (3) and a corner post (2) of the overhead power line pylon. Mushroom foundation (1) according to Claim 1 or 2, characterized in that the connecting element (7) is designed to be temporarily connectable to the mushroom shaft (6). Mushroom foundation (1) according to one of Claims 1 to 3, characterized in that the connecting element (7) is connected to the foot frame structure (3) and the corner post (2) of the overhead line pylon and to the mushroom shaft (6) via screw connections. Mushroom foundation (1) according to Claim 1, characterized in that the connecting element (7) is designed as the upper end of the mushroom shaft (6). Mushroom foundation (1) according to one of Claims 1 to 5, characterized in that the stiffening element (9) projects perpendicularly from the mushroom base plate (10). Mushroom foundation (1) according to one of Claims 1 to 6, characterized in that several stiffening elements (9) are arranged on the mushroom base plate (10) and stiffen it over the entire surface. Mushroom foundation (1) according to one of Claims 1 to 7, characterized in that the stiffening elements (9) are designed as profiles and are connected to the mushroom base plate (10). Mushroom foundation (1) according to one of Claims 1 to 8, characterized in that the stiffening elements (9) on the mushroom base plate (10) are arranged oriented upwards and form upwardly open receptacles which receive soil or weighting elements when the foundation pit is filled. Mushroom foundation (1) according to one of Claims 1 to 9, characterized in that the mushroom base (4) is formed from L-profiles, one leg of the L-profile forming the mushroom base plate (10) and one leg forming the stiffening element (9). Mushroom foundation (1) according to one of Claims 1 to 10, characterized in that the mushroom foundation (1) is made of steel or galvanized steel. Mushroom foundation (1) according to one of Claims 1 to 10, characterized in that the mushroom foundation (1) has a corrosion-inhibiting coating or is made of a non-corrosive material with corresponding static properties. Mushroom foundation (1) according to one of Claims 1 to 12, characterized in that additional stiffening elements (9) are arranged on the mushroom base plate (10) and are welded to it. Mushroom foundation (1) according to one of Claims 1 to 13, characterized in that the lower end of the mushroom shaft (6) is screwed to the shaft joint (8). Mushroom foundation (1) according to one of Claims 1 to 14, characterized in that the shaft joint (8) is formed from two L-profiles projecting perpendicularly from the mushroom base plate (10). Mushroom foundation (1) according to Claim 15, characterized in that the mushroom shaft (6) is designed as a cross profile corresponding to the L-profile of the shaft joint (8). Mushroom foundation (1) according to Claim 16, characterized in that the cross profile of the mushroom shaft (6) is formed from two L-profiles welded together at their corners.

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