EP3061872A1 - Dispositif destiné à immobiliser, en particulier à assainir, une fondation pour des éoliennes, et fondation et procédé d'assainissement - Google Patents

Dispositif destiné à immobiliser, en particulier à assainir, une fondation pour des éoliennes, et fondation et procédé d'assainissement Download PDF

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Publication number
EP3061872A1
EP3061872A1 EP15156696.5A EP15156696A EP3061872A1 EP 3061872 A1 EP3061872 A1 EP 3061872A1 EP 15156696 A EP15156696 A EP 15156696A EP 3061872 A1 EP3061872 A1 EP 3061872A1
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EP
European Patent Office
Prior art keywords
foundation
securing
concrete body
concrete
fixture
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP15156696.5A
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German (de)
English (en)
Inventor
Ralf Thomsen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wpt Nord GmbH
Original Assignee
Wpt Nord GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wpt Nord GmbH filed Critical Wpt Nord GmbH
Priority to EP15156696.5A priority Critical patent/EP3061872A1/fr
Priority to US15/053,761 priority patent/US20160251818A1/en
Publication of EP3061872A1 publication Critical patent/EP3061872A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/32—Foundations for special purposes
    • E02D27/42—Foundations for poles, masts or chimneys
    • E02D27/425—Foundations for poles, masts or chimneys specially adapted for wind motors masts

Definitions

  • the invention relates to a securing device for additionally securing a foundation, which has a built-in concrete body foundation fixture for receiving the structure, in particular a tower of a wind turbine (WEA).
  • WEA wind turbine
  • the invention further relates to a foundation for such a structure, in particular a tower of a wind turbine with a concrete body and a built-in concrete body foundation fixture, which has a substantially cylindrical body on which extends at least one annular flange, which serves as axial anchoring of the foundation component in the concrete body is used, wherein the foundation component is installed with its central axis substantially vertically aligned.
  • the invention relates to a method for securing a foundation for a building, in particular a tower of a wind turbine.
  • the foundation component is usually made of steel and the concrete is reinforced by steel reinforcements.
  • the foundation mounting part generally has a substantially cylindrical or tubular base body, on which two annular flanges extend axially spaced from each other. Both annular flanges are installed in the concrete body, in such a way that the central axis of the cylindrical body is oriented substantially vertically.
  • An upper end of the foundation component lies above the surface and has a connection flange.
  • the tower of the wind energy plant is flanged to this connection flange.
  • a reinforcement cage is provided between the two annular flanges externally around the foundation fixture.
  • the lower annular flange then serves to initiate the occurring moments (esp. On the windward side) as compressive forces upwards in the concrete body, and the upper annular flange is supported from above on the underlying portion of the concrete.
  • moments esp. On the windward side
  • the upper annular flange is supported from above on the underlying portion of the concrete.
  • a usual stress situation is in Fig. 1 shown.
  • a known problem which is directly related to the installation, is due to the shrinkage of the concrete during setting. Each concrete undergoes a set, albeit small, shrinkage, so that it can come in the axial direction along the foundation fixture between the two annular flanges to chambers or columns. As a result, both the lower annular flange no longer sufficiently upwards and the upper annular flange can no longer sufficiently supported down. As a result, the foundation fixture is equipped with a slight play, resulting in movement of the entire structure under load.
  • Object of the present invention is therefore to provide a safety device, a foundation and a method of the aforementioned type, which can be used both prophylactically and for the restoration of broken foundations and provide a durable, cost-effective solution for securing the rehabilitation of a foundation of a building , It should be dispensed in particular to additional introduction of concrete or concrete replacement.
  • the object is achieved by the features of claim 1, ie in particular by at least one fuse body with a mounting portion and a support portion, wherein the mounting portion is formed for attachment of the fuse body to the foundation fixture and the Supporting section for introducing foundation forces is formed in a portion of the concrete body remote from the foundation fixture.
  • the invention is based on the finding that a foundation can be additionally secured by the fact that foundation forces are introduced into areas that are not or only slightly loaded by the foundation component itself. It has been found that the area of the concrete body is the most heavily loaded, which extends in the axial direction Ober depiction of the annular flanges of the foundation component or directly adjacent. In contrast, areas that lie away from the foundation component are often essentially unloaded. Therefore, such sections of the concrete body offer to additionally introduce at least a portion of the foundation forces in this.
  • a section is understood, which extends around the foundation fitting around, preferably radially outwardly, and axially adjacent to any annular flanges or other anchoring elements present on the foundation fixture.
  • the removed portion is about 10 cm to 80 cm, preferably 30 cm to 60 cm, more preferably about 40 cm in the radial direction of an annular flange or other anchoring element of the foundation component.
  • a diameter of the removed region is preferably about 1.3 to 2.5 times, in particular 1.5 to 2.0 times, particularly preferably about 1.7 times the diameter of the foundation component. This dimension may also depend on the exact dimension of a reinforcement in the concrete that is to receive support forces.
  • the securing device is used as a refurbishment device for refurbishing a damaged foundation. If the above-described damage has already occurred in the case of a foundation and, for example, cavities or gaps have formed axially adjacent to the annular flanges of the foundation component, the securing device according to the invention is preferably used for refurbishing such a foundation.
  • the support section preferably serves for introducing foundation forces into a section of the concrete body which is remote from the foundation component and which is intact.
  • An intact section of the concrete body is understood to mean a section which has no or no significant signs of fatigue and in which no faulty concrete joints or cracks are present.
  • the invention is not limited to use in wind turbines, although it can be used here particularly advantageously and economically. Rather, a securing device according to the invention for additional securing a foundation, similar even in similar stress situations Foundations having a built-in concrete body foundation fixture, are used. Structures affixed to such a foundation fixture include, but are not limited to, machinery, in particular folding machines, large machinery, presses, power poles, transmission towers, bridge piers, building piers, and the like. Particularly advantageous is the use of the securing device for dynamically loaded foundations.
  • the concrete body is preferably designed as a reinforced concrete body and adapted to receive foundation forces. Also preferred are other types of concrete, such as prestressed concrete, fiber reinforced concrete, textile concrete, reaction concrete and the like.
  • a maximum outer diameter of the securing body is greater than a maximum outer diameter of the foundation component.
  • a maximum outer diameter of the securing body is greater than a maximum outer diameter of an upper annular flange or another anchoring element of the foundation component.
  • the maximum outer diameter of the securing body is at least 5%, at least 10%, at least 15%, at least 20% larger than the maximum outer diameter of the foundation component.
  • the securing body is designed as a ring segment, in particular as a half, third, or quarter ring segment.
  • This embodiment is particularly preferred when the foundation fixture has a cylindrical basic shape.
  • correspondingly angular securing bodies are preferably provided.
  • foundation components which have a basic polygon shape, such as hexagonal or octagonal, in which also correspondingly angular securing body are provided.
  • the fuse body is designed as a ring segment, assembly is considerably simplified.
  • the fuse body is designed as a half-ring segment.
  • two securing bodies are preferably used for the securing device according to the invention in order to jointly form a complete ring, which is externally peripherally fastened to the foundation component by means of the fastening portion of the securing body.
  • the fuse body is substantially planar.
  • the fuse body is formed from sheet metal, in particular sheet steel. This is a particularly easy way to make the fuse body.
  • sheet metal in particular sheet steel.
  • a steel sheet with 50 mm thickness is preferred. This provides sufficient strength to Secure foundations in wind turbines. Depending on the size of the foundation and the structure attached to the lost property as well as the nature of the forces to be absorbed, other sheet thicknesses may also be preferred. If the fuse body is substantially flat, its manufacture, as well as its transport and assembly, are considerably simplified. As a result, costs compared to conventional backup or renovation concepts can be reduced.
  • the attachment portion has a first plurality of through holes for receiving fastening means for fastening the securing body to the foundation fixture.
  • the fastening means are designed as fastening screws. This is a particularly simple and subsequently without much effort to be attached mounting option for the fuse body. This makes it possible to provide on the foundation fixture corresponding fastening means, in particular threaded holes. Fixing screws provide a degree of elasticity which, upon introduction of foundation forces by means of the securing body, is advantageous from the foundation fitting into a portion of the concrete body remote from the foundation fitting. It may also be preferable to attach the fuse body to the foundation fixture by means of a welded joint, but a welded joint has the disadvantage of weld distortion of the material, which may be detrimental to dynamic loading.
  • At least one stiffening strut is arranged on the securing body, which has a contact portion which is adapted to come into contact with a section of a foundation fixture and / or a structure arranged thereon.
  • the arrangement of the stiffening strut on the fuse body and its contact with a portion of a foundation component and / or a building arranged thereon creates a stiffening effect for the fuse body.
  • the stiffening strut is preferably designed to support the securing body in order to at least partially accommodate introduced foundation forces.
  • the stiffening effect is achieved by the arrangement of at least one stiffening strut per fuse body, which additionally absorbs the forces by the system on a foundation fixture and / or a structure arranged thereon.
  • the contact section preferably comes into contact with an outer circumference of a flange, for example a connection flange of the foundation component.
  • a flange portion is due to its radial extent particularly for Support and absorption of forces suitable.
  • two or more, in particular five or more stiffening struts are arranged on a securing body. It is preferred to provide the stiffening struts so as to be substantially equidistant from each other.
  • the stiffening strut extends in an installed state substantially vertically upward from the fuse body.
  • the stiffening strut is designed as a gusset plate, which extends substantially perpendicular to a planar extension of the securing body.
  • the gusset plate is fixed to the fuse body, preferably by a cohesive connection, such as a welded joint.
  • the gusset plate is preferably made of steel, preferably formed from a steel sheet.
  • the surfaces of the gusset plate can be designed as closed or at least partially open surfaces with recesses and / or openings. Partially open areas have the advantage of lower weight and material savings.
  • the support portion of the fuse body has at least one receiving device for a support device.
  • the support means is preferably for supporting the securing body on the removed portion of the concrete body and for biasing the securing body in a vertical direction.
  • the support means may be integrally provided on the support portion of the fuse body, or be reversibly detachably connected thereto.
  • a particularly preferred coupling of the support portion is achieved with the concrete body.
  • a targeted bias of the support portion in the vertical direction that is, a tensile force on the foundation component vertically upwards, ie out of the concrete body, reach.
  • the receiving device for the support device on a second plurality of through holes.
  • Through holes serve in particular to at least partially receive the support means, so as to produce a non-positive and / or positive connection between the support means and the support portion of the fuse body.
  • the contact portion has a support means.
  • the support means on the contact portion of the stiffening strut and the support means, which is arranged on the receiving device of the support body, may be identical or similar and in particular be designed according to one of the following aspects.
  • the support device has at least one pressure screw with a ball plate.
  • the through holes of the receiving device are provided with internal threads to receive the pressure screw.
  • the ball plate of the pressure screw is preferably supported directly on the concrete body.
  • one or more additional pressure pieces are provided between the ball plate and the concrete body.
  • Such pressure pieces may be formed, for example, as a metal sheet, in particular steel sheet or the like, and serve to reduce the surface pressure, so as to avoid damage to the concrete body as far as possible.
  • Through the ball plate is always a flat support on the concrete body or the pressure piece achieved.
  • a ball plate can compensate for certain inclinations, which is particularly advantageous for a dynamic load on the foundation.
  • the support means comprises at least one hard rubber body.
  • a hard rubber body preferably extends flat over the entire support portion of the fuse body.
  • the hard rubber body is adapted to rest on the concrete body in the portion remote from the foundation fixture.
  • An axial thickness of the hard rubber body may be selected to load the foundation fixture in a vertical upward direction, thereby pressing a lower annular flange or an anchoring element located distally beneath the ground in the concrete body with its upwardly directed surface against a portion of the concrete body.
  • a hard rubber body also has the advantage that it allows low movements due to the elasticity and at the same time has a vibration-damping effect. It is avoided too large surface pressure on the concrete body, and at the same time a seal against water ingress can be realized. Further, a hard rubber body is a low-cost component, whereby the securing device can be produced overall cost.
  • the support means alternatively or additionally comprises at least one spring element, in particular a plate spring.
  • the support means comprises a plurality of disc springs.
  • the support device additionally or alternatively has at least one hydraulic cylinder.
  • the support means comprises a plurality of hydraulic cylinders.
  • a bias in the vertical direction is particularly easy to adjust.
  • a hydraulic supply for the hydraulic cylinders can be accommodated, for example, inside the tower shaft of the wind energy plant.
  • hydraulic cylinders can also be provided a subsequent adjustment of the bias voltage at the onset of subsidence or the like.
  • the support means additionally or alternatively comprises a vibration damper.
  • vibration damper for example, those can be used which are available under the brand Schwingmetall® from the company ContiTech AG, Hannover.
  • Such vibration dampers can be connected in a simple manner with the support portion of the fuse body by means of a screw connection, are inexpensive and designed for such loads.
  • the support means additionally or alternatively on at least one machine base.
  • machine feet are designed for such loads and also have damping properties. They can be arranged in an advantageous manner in the support section in order to achieve a connection of the fuse body to the concrete body.
  • the support means additionally or alternatively on at least one clamping wedge pair.
  • a pair of clamping wedges preferably consists of two clamping wedges which, in cross-section, have a shape which corresponds to a right-angled triangle and abut one another with their sides which define the hypotenuse.
  • a clamping device such as a clamping screw
  • the two clamping wedges are braced against each other and displaceable, so that two side surfaces of the clamping wedge pair, which extend substantially parallel to the clamping direction, are movable away from each other.
  • clamping wedge pair is provided on the securing body such that one of the surfaces cooperates with the supporting portion and the other surface bears against the concrete body, a pressing force can be applied by means of the clamping wedges so as to load the foundation fitting in a vertical direction.
  • the support section of the securing body is designed to rest directly on the section of the concrete body remote from the foundation fixture. Immediately here means that no further intermediate element such as a support device is provided.
  • the securing body lies with its support portion directly on the concrete body, it being accepted that impurities or elements of a surface pretreatment, such as potting compound, are present on the concrete body.
  • impurities or elements of a surface pretreatment such as potting compound
  • the foundation component preferably has at least two annular flanges arranged axially spaced from one another.
  • the concrete body further comprises a steel reinforcement, at least axially between the two annular flanges. This achieves a good anchoring.
  • annular flanges and other anchoring elements may be provided, for example, interrupted flanges, which are also taken under the concept of the annular flange.
  • the foundation member axially spaced at least two annular flanges on the base body, and the securing body is at the upper of the two annular flanges attached.
  • the upper annular flange of the foundation fixture is substantially loaded from its downwardly facing surface. It is usually arranged close to the surface and covered only with a comparatively thin layer of concrete, which also generally has no reinforcement.
  • the lower annular flange is poured below the ground in the concrete body and spaced about 1 to 2 meters from the upper ring flange.
  • the lower annular flange is loaded substantially from its upper surface. Over the upper surface of the lower ring flange a reinforcement is usually arranged.
  • a fastening of the securing body to the upper annular flange is also to be loaded in a simpler manner, namely by being supported by the supporting section on a surface of the concrete body.
  • An installation of the fuse body in the concrete body is not required. It may be an additional cover, in particular to protect the connection between the foundation component and the fuse body, be provided, but this is not mandatory.
  • the upper annular flange has a plurality of threaded bores for receiving fastening screws.
  • these threaded holes of the fuse body can be fastened via the attachment portion to the foundation fixture.
  • Blind holes are particularly preferred because they can provide some protection against water penetration and thus contribute to a permanent solution. Furthermore, blind holes are easier to insert than through holes, as less material must be machined and otherwise there is a risk that the used boring machine is damaged by the underlying concrete.
  • At least one thrust piece for transmitting foundation forces from the support portion into the concrete body is provided between the support portion and the concrete body.
  • a pressure piece is preferably formed as a metal plate, in particular steel plate, to avoid or reduce a surface pressure between the support portion and the concrete body.
  • the pressure piece is fastened by means of a potting compound substantially horizontally aligned to the concrete body in the portion of the concrete body remote from the foundation fixture.
  • casting compound can be any kind of suitable Potting compound, such as a resin used. This can cause an advantageous introduction of supporting forces in the concrete body.
  • the main body is preferably formed substantially cylindrical.
  • the securing device according to the first aspect of the invention as well as the foundation according to the second aspect of the invention and the method according to the third aspect of the invention have a plurality of common aspects and preferred embodiments as set forth in particular in the subclaims , In this respect, reference is made in full to the above description and the advantages presented therein.
  • the term "removed portion" is understood as defined above.
  • the method is particularly preferably designed as a refurbishment method for refurbishing a defective foundation. If the foundation has damage, as explained at the outset, these damages can be advantageously remedied by means of the method according to the invention. It is not necessary to introduce additional concrete or concrete substitutes for closing cracks or cavities; the necessary stability is achieved by supporting the foundation component on the section of the concrete body remote from the foundation component. As a result, a refurbishment is much easier and subsequently feasible without much effort.
  • the method comprises the step of fastening a securing device according to one of the above-described preferred embodiments of a securing device according to the invention first aspect of the invention.
  • the securing device is preferably fastened to the upper annular flange of the foundation component.
  • the step of supporting the foundation fixture on a portion of the concrete body remote from the foundation fixture is preferably effected by means of the fixture according to the first aspect of the invention.
  • the method comprises the step of: pressing the upper surface of the lower annular flange against a portion of the concrete body.
  • a particularly good securing of the foundation is achieved and causes a continuous contact between the upper surface of the lower annular flange and the concrete body.
  • this step is effected by means of the support means described above.
  • this has the step: clamping the foundation component in a vertical upward direction. This also ensures a particularly good assurance, and reduces any cavities or gaps above the lower annular flange. In addition, the load on the annular flanges or other anchoring elements is at least partially reduced.
  • the method comprises at least one of the following steps: exposing an upper surface of the upper annular flange; Inserting a plurality of threaded holes in the upper surface of the upper annular flange; Pressing by means of a support device against the support portion for bracing the foundation component; Arranging at least one pressure piece on a surface of the portion of the concrete body remote from the foundation component.
  • Fig. 1 is a foundation 1 shown in cross section.
  • the foundation 1 has a concrete body 2, which is formed on the ground 4.
  • On the Soil is a layer of cleanliness.
  • a foundation fitting 6 is installed in the concrete body 2.
  • the foundation fitting 6 is formed substantially rotationally symmetric about a central axis A around.
  • the foundation fitting 6 has a cylindrical main body 8 and a connecting flange 10, to which a tower 14 of a wind energy plant (not shown) is flanged by means of a corresponding counter flange 12.
  • the foundation component 6 Arranged within the concrete body 2, the foundation component 6 has two ring flanges 16, 18 extending axially spaced from one another and forming anchoring elements of the foundation component in the concrete body 2.
  • the annular flanges 16, 18 each have an upper surface 16a, 18a and a lower surface 16b, 18b.
  • the two annular flanges 16, 18 extend both externally and internally on the base body. 8
  • a steel reinforcement (only schematically indicated) is provided both between the two annular flanges 16, 18 in the vertical direction and below the lower annular flange 18.
  • the concrete body 2 has a steel-reinforced portion 20 and a cover layer 22, also referred to as a concrete, which extends in the vertical direction from the upper annular flange 16 to the surface 24.
  • This cover layer 22 is only conditionally suitable for accommodating foundation forces.
  • Fig. 1 Furthermore, the main wind direction is indicated and represented by the arrow 26. This is in terms of Fig. 1 from the left.
  • a tensile force 28 introduced, whereas on the side facing away from the wind direction of the tower 14, a compressive force 30 is introduced.
  • a highly stressed pressure contact between the surface 16b and the corresponding portion of the concrete body portion 20 and a less pressurized area between the upper surface 18a of the lower annular flange on the On the upper annular flange 16 also loads the entire mass of the connected to the foundation fixture 6 structure.
  • the known securing methods or remediation methods aim to fill the cavities present due to the cracks 32 with a filling material, such as a reactive concrete, or to replace the concrete in this area.
  • a foundation fitting 6 is shown in a perspective view, which essentially according to the foundation component according to Fig. 1 equivalent.
  • the foundation fitting 6 according to Fig. 2 has a substantially cylindrical or tubular base body 8, on which two annular flanges 16, 18 extend, wherein from the upper annular flange 16 only the inwardly projecting part can be seen.
  • a connection flange 10 is further provided, which has a plurality of through holes 11, so that a tower 14 of a wind turbine (see. Fig. 1 ) is attachable to the foundation fitting 6.
  • the securing device 100 is for additionally securing a foundation 1, such as in FIG Fig. 1 illustrated, which has a built-in concrete body 2 foundation component 6 for receiving a structure, in particular a tower 14 of a wind turbine, formed.
  • the safety device 100 according to this exemplary embodiment has three safety bodies 102, 104, 106. Each of the fuse bodies 102, 104, 106 has a mounting portion 108, 110, 112 (see also FIG Fig. 3 ) and a support portion 114, 116, 118.
  • the fastening portion 108, 110, 112 By means of the fastening portion 108, 110, 112, the securing bodies 102, 104, 106 are secured against an upper surface 16a of the upper annular flange 16 (in FIG Fig. 2 hidden) attached.
  • the fastening section 108, 110, 112 of the securing bodies 102, 104, 106 each have a plurality of through holes 120 (only in FIG Fig. 3 provided with reference numerals), which are provided at equal intervals to each other, and which serve to receive screws.
  • the support portion 114, 116, 118 of the fuse body 102, 104, 106 is formed for introducing foundation forces in a portion of the concrete body remote from the foundation component 6. This is realized according to this embodiment, characterized in that in the mounted state, the support portion 114, 116, 118 of the fuse body 102, 104, 106 extends radially outward than a radially outer end of the upper annular flange 16.
  • the securing bodies 102, 104, 106 are essentially part-ring-shaped, here as third rings. In other embodiments, quarter or half rings may also be provided.
  • the partial ring shape is preferred in this embodiment, since the foundation fitting 6 has a substantially cylindrical basic structure. In other foundation fixtures having, for example, a rectangular basic structure, other shapes are preferred for the fuse body 102, 104, 106.
  • the support sections 114, 116, 118 of the securing bodies 102, 104, 106 each have a receiving device 122 for receiving a support device.
  • the receptacle 122 is formed as a second plurality of through holes according to this embodiment, and will be described with reference to FIG Fig. 4 be described in more detail.
  • the receiving device 122 is already shown with a supporting device 124 disposed therein.
  • Each fuse body 102, 104, 106 has according to this embodiment, a plurality of support means 124, wherein in Fig. 2 only one is provided with reference numerals.
  • FIG. 4 is the referring to Fig. 1 right upper portion of the foundation fixture 6. Radially outside the foundation fixture 6 and above the upper annular flange 16, the portion 22 of the concrete body 2 has been removed, so that the portion 20 is exposed. Inside the foundation fitting 6, the section 22 is still present. By removing the portion 22 radially outward of the foundation fitting 6, the upper surface becomes 16a of the upper annular flange 16 exposed. On this surface 16 a, the securing device 100 is attached. For this purpose, the attachment portion 108 rests on the surface 16a.
  • a fastening screw 126 is guided, which is screwed into a threaded blind hole 128 in the annular flange 16.
  • the screw 126 is formed according to this embodiment as an M24 screw and can accommodate a load of 22 kN. S are further screws not shown, according to this embodiment, a total of 15 each fuse body 102, 104, 106. There is a certain overlap between the mounting portion 108 and the surface 16a provided so that the screw 126 is substantially loaded to train and experiences no moments ,
  • the support portion 114 projects beyond a radially outer end 17 of the annular flange 16 also.
  • the support portion 114 is disposed vertically above a portion 23 of the concrete body 2 remote from the foundation fixture.
  • the portion 23, which extends radially outward of the end 17 of the foundation fixture 6, is substantially free of foundation forces and also free of any cracks or the like prior to attachment of the security device 100. It is an intact portion of the concrete body 2. Therefore, this section 23 is particularly suitable to accommodate foundation forces, either in which the securing device 100 is prophylactically attached to the foundation component 6, or subsequently, by way of a renovation of the foundation 1.
  • Der Supporting portion 114 has approximately a radial extent corresponding to the radial extent of the annular flange 16 radially outside of the main body 8. Thus, a support radially outside the main body 8 by the securing device 100 is approximately doubled. A force F acting on the fuse body 102 is also in Fig. 4 marked (see also so far Fig. 7 ).
  • the securing device 100 has a support device 124 which is arranged in a receptacle 122 provided for this purpose for the support section 114.
  • the support means 124 is formed according to this embodiment as a pressure screw 130 which extends through a through hole and has a ball plate 132 at the foot end.
  • There are a total of 15 such pressure screws per fuse body 102, 104, 106 are provided in the FIGS. 4 and 6 However, only one is shown in each case (see also Figures 2 and 7 ).
  • the ball plate 132 is on a pressure piece 134, which according to this embodiment additionally in the section 23rd is provided and secured there with a potting compound 136.
  • the pressure piece 134 By the pressure piece 134, a bearing force of the ball plate 132 is introduced surface into the section 23, and a surface pressure of the ball plate 132 directly on the concrete of the section 23 is avoided.
  • the pressure piece 134 has a flat support surface for the ball plate 132.
  • the screw 130 is additionally provided with a lock nut 138 to prevent unintentional release of the support means 124.
  • the support means 124 may be used after attachment of the securing device 100 so that a certain bias is applied. By means of the support means 124, it is possible to at least partially lift the foundation fixture 6 and to align it vertically if necessary. Furthermore, by means of the support means 124, a possibility is created, an upper surface 18a (in Fig. 4 not shown) of the lower annular flange 18 to press against a portion of the concrete body to make a contact, without filling of cracks with additional concrete or concrete replacement.
  • FIGS. 5 and 6 show variants of the securing device 100, which is attached to a foundation fitting 6.
  • the differences are essentially dealt with, and according to the first exemplary embodiment according to FIG Fig. 4 the same and similar elements are provided with the same reference numerals. In this respect, the full scope of the above description of the first embodiment ( Fig. 4 ).
  • the embodiments differ according to the FIGS. 5 and 6 from the in Fig. 4 in that the securing body 102 does not bear directly on the upper surface 16a of the annular flange 16, but is spaced therefrom vertically, in the direction of the central axis A.
  • This has the advantage that the section 22 of the concrete body 2 only has to be partially removed, namely only substantially vertically above the surface 16a.
  • a support block 140 is provided, which can be provided as a push rod or also as a partial ring segment, corresponding to the shape of the fuse body 102.
  • the support block 140 transmits a pressing force from the attachment portion 108 to the surface 16 a.
  • a screw 126 is provided which extends through a through hole in the mounting portion 108 and is screwed into a threaded blind hole 128 in the annular flange 16.
  • An additional positive or cohesive connection between support block 140 and mounting portion 108 and / or annular flange 16 is not required, although in individual embodiments, the support block 140 may be integrally attached to the fuse body 102, 104, 106.
  • the support block 140 may be integrally attached to the fuse body 102, 104, 106.
  • a support means 124 which is identical to the support means 124 according to the embodiment of Fig. 4 is trained. In this respect, reference is made to the above description.
  • Fig. 7 again illustrates the biasing of the securing device 100 by means of the support means 124.
  • Fig. 7 is a full section through a foundation 1 and a built-in foundation insert 6 is shown.
  • the securing device 100 is corresponding to that according to the first embodiment Fig. 4 formed.
  • the support device 124 is in Fig. 7 biased so that a compressive force F D is applied by means of the support device 124 on the portion 23 of the concrete body 2.
  • the foundation fitting 6 with respect to Fig. 7 pulled upward so that the upper surface 18 a of the lower annular flange 18 is pressed against a portion 21 of the concrete body 2.
  • the flange force F 18 is indicated by the tower, as in Fig. 1 shown, lifting of the upper surface 18a is avoided by the portion 21 of the concrete body 2, whereby the stability is increased.
  • a fourth embodiment of the invention is shown.
  • the same and similar elements are denoted by the same reference numerals as in the first three embodiments. In this respect, reference is made in full to the above description of the first three embodiments.
  • the foundation fitting 6 according to the FIGS. 8 and 9 corresponds essentially to the foundation fitting 6 according to Fig. 1 and 2 .
  • the foundation fitting 6 according to 8 and 9 has a substantially cylindrical or tubular base body 8, on which two annular flanges 16, 18 extend, wherein from the upper annular flange 16 only the inwardly projecting part can be seen.
  • a connection flange 10 is further provided, which has a plurality of through holes 11, so that a tower 14 of a wind turbine (see. Fig. 1 ) is attachable to the foundation fitting 6.
  • the support sections 114, 116, 118 of the securing bodies 102, 104, 106 each have a receiving device 122 for receiving a support device.
  • the receiving device 122 is formed according to this embodiment as a second plurality of through holes.
  • the fuse bodies 102, 104, 106 have a plurality of stiffening struts, which are here designed as gusset plates 190 (in FIG 8 and 9 only one provided with reference numerals), whereby a deformation of the fuse body 102, 104, 106 and thus an unwanted "sagging" of the foundation component 6 counteracted. According to this embodiment ( Fig.
  • gusset plates 190 are respectively arranged on each securing body 102, 104, 106, so that the securing device 100 has a total of 15 gusset plates 190.
  • Fig. 10 For a detailing is on Fig. 10 referred to, which will be described below.
  • Fig. 10 is a detail of the upper portion of a foundation component 6 with its connecting flange 10 and upper annular flange 16 and the securing device 100 according to the fourth embodiment shown in a perspective view. Further shows Fig. 10 three gusset plates 190 which extend perpendicular to a flat extension of the fuse body 102 and are arranged thereon. The gusset plates 190 are welded in the web joint by a double fillet 192 on the fuse body 102, 104, 106 attached. The gusset plates 190 each have a contact portion 194, with which they are in contact with the connection flange 10 of the foundation component 6.
  • the contact portion 194 further comprises a support means 196, which is formed according to this embodiment as a pressure screw 198 with a ball plate 200.
  • a support means 196 which is formed according to this embodiment as a pressure screw 198 with a ball plate 200.
  • the pressure screw 198 is screwed through this internal thread in order to realize a non-positive connection between the connection flange 10 and the stiffening strut with the screw base and a suitable ball plate 200.
  • the pressure screw 198 is the possibility of realizing an axial bias of the safety body 102, 104, 106 via an adjustment of the inclination of the corresponding node plate 190 to the axis A.
  • the support means 196 is substantially is formed according to the support means 124 and insofar reference is made to the above description of the support means 124. Although in this embodiment ( Fig. 8 to 10 Support means 124 are provided on the support portion 114, 116, 118, it should be understood that this is not absolutely necessary, but the support portion 114, 116, 118 also according to the third embodiment ( Fig. 4 ) may be formed.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Foundations (AREA)
EP15156696.5A 2015-02-26 2015-02-26 Dispositif destiné à immobiliser, en particulier à assainir, une fondation pour des éoliennes, et fondation et procédé d'assainissement Withdrawn EP3061872A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP15156696.5A EP3061872A1 (fr) 2015-02-26 2015-02-26 Dispositif destiné à immobiliser, en particulier à assainir, une fondation pour des éoliennes, et fondation et procédé d'assainissement
US15/053,761 US20160251818A1 (en) 2015-02-26 2016-02-25 Apparatus for securing, in particular remediating, the foundation of a wind turbine, as well as foundation and method for remediating

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15156696.5A EP3061872A1 (fr) 2015-02-26 2015-02-26 Dispositif destiné à immobiliser, en particulier à assainir, une fondation pour des éoliennes, et fondation et procédé d'assainissement

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EP3061872A1 true EP3061872A1 (fr) 2016-08-31

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EP15156696.5A Withdrawn EP3061872A1 (fr) 2015-02-26 2015-02-26 Dispositif destiné à immobiliser, en particulier à assainir, une fondation pour des éoliennes, et fondation et procédé d'assainissement

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130255169A1 (en) * 2012-03-30 2013-10-03 Allan P. Henderson Cementitious foundation cap with post-tensioned helical anchors

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130255169A1 (en) * 2012-03-30 2013-10-03 Allan P. Henderson Cementitious foundation cap with post-tensioned helical anchors

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
BOSSE, ERNEUERBARE ENERGIEN, February 2009 (2009-02-01), pages 24 - 30

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