US20130000236A1 - Footing for wind turbine towers - Google Patents

Footing for wind turbine towers Download PDF

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Publication number
US20130000236A1
US20130000236A1 US13/533,066 US201213533066A US2013000236A1 US 20130000236 A1 US20130000236 A1 US 20130000236A1 US 201213533066 A US201213533066 A US 201213533066A US 2013000236 A1 US2013000236 A1 US 2013000236A1
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US
United States
Prior art keywords
footing
wind turbine
tower
turbine tower
tower according
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.)
Abandoned
Application number
US13/533,066
Inventor
Rodrigo Gallardo Hernandez
Francisco Javier Gonzalez Santamarta
Naiara Doblas Tellechea
Ignacio Ruiz Urien
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.)
Siemens Gamesa Renewable Energy Innovation and Technology SL
Original Assignee
Gamesa Innovation and Technology SL
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 Gamesa Innovation and Technology SL filed Critical Gamesa Innovation and Technology SL
Assigned to GAMESA INNOVATION & TECHNOLOGY, S.L. reassignment GAMESA INNOVATION & TECHNOLOGY, S.L. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: Doblas Tellechea, Naiara, Gonzalez Santamarta, Francisco Javier, Ruiz Urien, Ignacio, GALLARDO HERNANDEZ, RODRIGO
Publication of US20130000236A1 publication Critical patent/US20130000236A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
    • F03D13/22—Foundations specially adapted for wind motors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/728—Onshore wind turbines

Definitions

  • the present invention refers to a footing used in the tower foundation. This footing provides a stable surface for placement and handling of, on the one hand, the various sections of the tower during their assembly, and, on the other, the heavy elements included inside the wind turbine.
  • Wind turbine towers stand on a ground supported by a footing.
  • the footings used differ in design and sizes, though the tendency is to save on material as much as possible while still conserving the features necessary to support the tower, nacelle and other elements making up the wind tower.
  • the material used for composing the footing is concrete, which is poured directly into the hole dug into the ground and allowed to set prior to erecting the tower. Once the tower has been completed, the nacelle is brought up followed by the heavy elements, the hub and blades.
  • the tower comprises various sectors that are gradually assembled.
  • a crane is employed for putting these sectors together, hoisting each one from the ground and assembling them in turn until finished.
  • the heavy elements inside the nacelle (generator, gearbox), the hub, the tower sectors, etc., are accumulated next to the tower while waiting for their turn to be mounted and, in order to facilitate their handling and hoisting, they must be placed upon a flat and solid surface.
  • the ground surrounding the tower is leveled and adapted on a surface equivalent to the extension reach as the footing. Notwithstanding this solution, it is not deemed to be an ideal solution.
  • Patent EP1526278 describes a concrete foundation footing for a wind turbine tower that determines a main part connected to foundation piles and comprises a cylindrical part and a frustoconical part. This main part is in turn covered around its circumferential borders with ballast material such as sand, onto which a layer of moved earth is placed so as to integrate the foundation with the surrounding landscape.
  • An object of the invention is to create a footing, preferably of concrete, so as to erect a tower comprising different sectors, the nacelle and its corresponding internal elements, the hub and the blades.
  • Another object of the invention is to furnish the footing with a broad radial surface with respect to the central point, on which the tower is erected.
  • another object of this invention is to furnish the tower pedestal with a footing having a horizontal extension close to ground level with a sufficient consistency so as to fulfill its purpose of supporting the different tower sections during assembly.
  • One of the primary advantages of the present footing is the minimizing of material used, which benefits in terms of considerable savings, setting time and consequently assembly, which results in cost benefits for material and time.
  • footing having the shape of a truncated cone, set inverted underneath the ground.
  • the larger base is closer to the surface, while the smaller base is set deep into the ground.
  • the estimated material savings is 20%.
  • Additional costs for current footings include the slabs added to the surface to make the upper part of the foundation flat and allow for the setting of cranes, tower sections and heavy elements such as the gearbox, generator, hub, etc.
  • FIG. 1 shows an overhead and plant view of the footing and its positioning with respect to the ground.
  • FIG. 2 shows a general view of a wind turbine and its foundation with the footing, object of this invention.
  • FIG. 3 represents a detail of the footing and its union with the concrete tower.
  • the footing seen from above presents a horizontal surface ( 1 ) having a circular or any other polyhedron shape with more than two sides obtained from a discretization of a circumference (hexagon, octagon, etc.), which extends radially from the axis ( 2 ) at a length of L. If a section were made as illustrated in FIG. 1 b, the lower part of the footing would form a truncated cone inverted at a height H. The part composed in this way is gapless compact reinforced concrete.
  • the upper horizontal part ( 1 ) has a pedestal ( 3 ) that connects with the tower (not shown in the figure).
  • FIG. 2 shows the footing joined to the tower ( 4 ) and wind turbine ( 5 ).
  • the horizontal surface ( 1 ) permits the setting down of tower sections and heavy elements such as the gearbox, generator, hub, etc.
  • the relationship between L and H is given by the conditions of the ground.
  • There are highly resistant terrains largely made up of rock) requiring a horizontal surface ( 1 ) with a length 2 L of approximately 20 meters.
  • weaker terrains call for a horizontal surface ( 1 ) with dimensions for 2 L closer to 30 meters so that the footing is firmly set.
  • distance L is equal to the radius of the circumference that circumscribes any possible polyhedron and can vary between a minimum L of 7.5 meters and a maximum L of 15 meters.
  • height H has minimum and maximum values of 1.5 and 5 meters respectively.
  • the pedestal ( 3 ) for connection with the tower ( 4 ) is at ground level, so as to cover the entire horizontal surface of the footing ( 1 ) with a layer of compact and tamped material.
  • the first step involves excavating based on the type of terrain with a view to having the base of the excavation in the shape of the footing, or filling it in to create the desired geometry.
  • spots with loose ground In sloping areas, spots with loose ground must be compacted well, since these are the areas where maximum tension occurs.
  • the manner to proceed is as follows: first use the concrete base, adhering to the shape of the footing. Next in line to be placed are the lower rebars, the bar cage, the footing cut rebars and the braces around the bars; lastly placing the upper rebar. Rebar placing is followed by concrete pouring. The last stage consists of concrete setting and curing.
  • the footing is covered with a layer of earth ( 6 ) which is compacted once the construction process has been completed.
  • the pedestal ( 3 ) remains above the surface with its bars ( 7 ), which constitute the connection system for the tower ( 4 ) with the foundation.
  • These connection systems are non-adhering tensioning elements embedded into the footing.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Wind Motors (AREA)

Abstract

Footing used for the foundation of a wind turbine tower characterized because it provides a stable horizontal platform (1) located at the surface, upon which the tower sections and the heavy elements that are subsequently mounted, viz., gearbox, generator, hub and blades, can be set without sinking.
The footing is characterized by its inverted truncated cone shape, and by the savings in material estimated at 20%, as well as for its union with the tower (4) through a pedestal (3) and its corresponding embedded tensioning elements in the footing.

Description

    OBJECT OF THE INVENTION
  • The present invention refers to a footing used in the tower foundation. This footing provides a stable surface for placement and handling of, on the one hand, the various sections of the tower during their assembly, and, on the other, the heavy elements included inside the wind turbine.
    • BACKGROUND OF THE INVENTION
  • Wind turbine towers stand on a ground supported by a footing. The footings used differ in design and sizes, though the tendency is to save on material as much as possible while still conserving the features necessary to support the tower, nacelle and other elements making up the wind tower. The material used for composing the footing is concrete, which is poured directly into the hole dug into the ground and allowed to set prior to erecting the tower. Once the tower has been completed, the nacelle is brought up followed by the heavy elements, the hub and blades.
  • The tower comprises various sectors that are gradually assembled. A crane is employed for putting these sectors together, hoisting each one from the ground and assembling them in turn until finished.
  • The heavy elements inside the nacelle (generator, gearbox), the hub, the tower sectors, etc., are accumulated next to the tower while waiting for their turn to be mounted and, in order to facilitate their handling and hoisting, they must be placed upon a flat and solid surface. Currently, the ground surrounding the tower is leveled and adapted on a surface equivalent to the extension reach as the footing. Notwithstanding this solution, it is not deemed to be an ideal solution.
  • Along these lines, Patent EP1526278 describes a concrete foundation footing for a wind turbine tower that determines a main part connected to foundation piles and comprises a cylindrical part and a frustoconical part. This main part is in turn covered around its circumferential borders with ballast material such as sand, onto which a layer of moved earth is placed so as to integrate the foundation with the surrounding landscape.
  • This solution does not take into account that setting tower sections, which are in line to be hoisted, onto the ground around the footing causes this area to sink, which consequently calls for the cementation of a platform around the tower with the subsequent rise in the civil engineering price for wind turbine.
    • DESCRIPTION OF THE INVENTION
  • An object of the invention is to create a footing, preferably of concrete, so as to erect a tower comprising different sectors, the nacelle and its corresponding internal elements, the hub and the blades.
  • Another object of the invention is to furnish the footing with a broad radial surface with respect to the central point, on which the tower is erected.
  • And finally, another object of this invention is to furnish the tower pedestal with a footing having a horizontal extension close to ground level with a sufficient consistency so as to fulfill its purpose of supporting the different tower sections during assembly.
  • One of the primary advantages of the present footing is the minimizing of material used, which benefits in terms of considerable savings, setting time and consequently assembly, which results in cost benefits for material and time.
  • The foregoing is attained with a footing having the shape of a truncated cone, set inverted underneath the ground. Thus, the larger base is closer to the surface, while the smaller base is set deep into the ground. With this new arrangement, the estimated material savings is 20%. Additional costs for current footings include the slabs added to the surface to make the upper part of the foundation flat and allow for the setting of cranes, tower sections and heavy elements such as the gearbox, generator, hub, etc.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • The following figures have been attached with a view to explaining how the footing is constituted, as well as its positioning with respect to the floor:
  • FIG. 1 shows an overhead and plant view of the footing and its positioning with respect to the ground.
  • FIG. 2 shows a general view of a wind turbine and its foundation with the footing, object of this invention.
  • FIG. 3 represents a detail of the footing and its union with the concrete tower.
    •  DESCRIPTION OF THE PREFERENTIAL EMBODIMENT
  • As shown in FIG. 1 a, the footing seen from above presents a horizontal surface (1) having a circular or any other polyhedron shape with more than two sides obtained from a discretization of a circumference (hexagon, octagon, etc.), which extends radially from the axis (2) at a length of L. If a section were made as illustrated in FIG. 1 b, the lower part of the footing would form a truncated cone inverted at a height H. The part composed in this way is gapless compact reinforced concrete. The upper horizontal part (1) has a pedestal (3) that connects with the tower (not shown in the figure).
  • FIG. 2 shows the footing joined to the tower (4) and wind turbine (5). The horizontal surface (1) permits the setting down of tower sections and heavy elements such as the gearbox, generator, hub, etc. The relationship between L and H is given by the conditions of the ground. There are highly resistant terrains (largely made up of rock) requiring a horizontal surface (1) with a length 2L of approximately 20 meters. Contrariwise, weaker terrains call for a horizontal surface (1) with dimensions for 2L closer to 30 meters so that the footing is firmly set. For the foregoing, distance L is equal to the radius of the circumference that circumscribes any possible polyhedron and can vary between a minimum L of 7.5 meters and a maximum L of 15 meters. In addition, height H has minimum and maximum values of 1.5 and 5 meters respectively.
  • The pedestal (3) for connection with the tower (4) is at ground level, so as to cover the entire horizontal surface of the footing (1) with a layer of compact and tamped material.
  • Turning to the constitution of the footing, the first step involves excavating based on the type of terrain with a view to having the base of the excavation in the shape of the footing, or filling it in to create the desired geometry. In sloping areas, spots with loose ground must be compacted well, since these are the areas where maximum tension occurs.
  • The manner to proceed is as follows: first use the concrete base, adhering to the shape of the footing. Next in line to be placed are the lower rebars, the bar cage, the footing cut rebars and the braces around the bars; lastly placing the upper rebar. Rebar placing is followed by concrete pouring. The last stage consists of concrete setting and curing.
  • As shown in FIG. 3, the footing is covered with a layer of earth (6) which is compacted once the construction process has been completed. The pedestal (3) remains above the surface with its bars (7), which constitute the connection system for the tower (4) with the foundation. These connection systems are non-adhering tensioning elements embedded into the footing. Once the first section of the tower (8) has been placed onto the pedestal, the bars (7) are then anchored. In the meanwhile, the second tower section (9) is located on the layer of compact ground (6) and there is no danger that it will sink, since the horizontal surface (1) of the footing provides it with a suitable seat.

Claims (6)

1. Footing for a wind turbine tower characterized by being furnished with:
an upper horizontal part (1) extending radially from the axis (2) and passing through the center of the tower for a distance L,
a second lower part in the shape of an inverted truncated cone having a height H and forming a single piece without internal gaps, completely compacted
and lastly, both parts remain connected by the setting of their constituent material.
2. Footing for a wind turbine tower according to the first claim, characterized because the upper horizontal surface (1) determines a circle or polyhedron shape of more than two sides.
3. Footing for a wind turbine tower according to the first claim, characterized because the material composing the footing is concrete poured into a rebar structure supported by the prepared terrain.
4. Footing for a wind turbine tower according to the first claim, characterized because the distance L can vary between 7.5 and 15 meters while the height H can have values between 1.5 and 5 meters.
5. Footing for a wind turbine tower according to the first claim, characterized because the foundation is covered with a layer of earth (6) which is compacted once the construction process has been completed.
6. Footing for a wind turbine tower according to the first claim, characterized because the connection with the first section of the tower (8) is made with a pedestal (3) by some bars (7) embedded in the footing.
US13/533,066 2011-06-28 2012-06-26 Footing for wind turbine towers Abandoned US20130000236A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ESES201100726 2011-06-28
ES201100726 2011-06-28

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US20130000236A1 true US20130000236A1 (en) 2013-01-03

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EP (1) EP2541059A2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150121784A1 (en) * 2012-06-06 2015-05-07 Gestamp Hybrid Towers, S.L. Ribbed foundation for superstructures and method for producing the foundation
US20200141082A1 (en) * 2017-07-04 2020-05-07 Takeuchi Construction Co., Ltd. Foundation structure for building, and construction method therefor
US11566394B2 (en) * 2019-12-02 2023-01-31 Takeuchi Construction Co., Ltd. Building foundation structure, and construction method therefor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103821676A (en) * 2014-02-12 2014-05-28 北京金风科创风电设备有限公司 Tower foundation of wind generating set

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US2373798A (en) * 1943-03-10 1945-04-17 Louis W Williams Foundation
US3572223A (en) * 1969-08-26 1971-03-23 Ralph L Vierregger Laterally-disengageable highway marker assembly
US3581508A (en) * 1969-08-18 1971-06-01 Ralph W Junius Uplift pile anchorage structure
US4972642A (en) * 1990-01-03 1990-11-27 Strobl Jr Frederick P Footings for post or beam construction
US5966882A (en) * 1994-12-19 1999-10-19 Naito; Kingo Structure of base of column and construction method for base of column
US6332303B1 (en) * 2000-02-28 2001-12-25 Nic Engineering Co., Ltd. Method of building underground structure
US20020166302A1 (en) * 2001-05-08 2002-11-14 Paul Ogorchock Footing for sound-barrier walls
US6564516B1 (en) * 1998-04-08 2003-05-20 Einar Svensson Support structure for elevated railed-vehicle guideway
US20060236648A1 (en) * 2005-04-12 2006-10-26 Grundman Curtis M Means for securing the lower end of a wind turbine tower to a foundation
US20080302038A1 (en) * 2004-04-02 2008-12-11 Aloys Wobben Method for Erecting a Tower
US20090320396A1 (en) * 2008-06-27 2009-12-31 Knudsen N Eric Post sleeve assembly
US20100024335A1 (en) * 2008-07-30 2010-02-04 Bianco James S Service tower base installation and protective barrier assembly therefor
US20100146890A1 (en) * 2008-12-16 2010-06-17 Vestas Wind Systems A/S Foundation for enabling anchoring of a wind turbine tower thereto by means of replaceable through-bolts
US7779588B1 (en) * 2009-03-24 2010-08-24 Bruning William E Concrete foundation for supporting a pole thereon
US7841143B2 (en) * 2006-07-05 2010-11-30 Vestas Wind Systems A/S Tower construction
US20110154758A1 (en) * 2008-01-16 2011-06-30 Willy Reyneveld Method and Apparatus for Setting Support Columns within a Foundation
US8051627B2 (en) * 2006-04-30 2011-11-08 General Electric Company Tower adapter, method of producing a tower foundation and tower foundation
US20110278850A1 (en) * 2009-12-25 2011-11-17 Mitsubishi Heavy Industries, Ltd. Monopole tower and wind turbine generator having monopole tower
US20120167499A1 (en) * 2009-09-11 2012-07-05 Artepref, S.A.U. Foundation for a Wind Turbine Tower
US20120260592A1 (en) * 2009-10-22 2012-10-18 Amsc Windtec Gmbh Foundation fixing unit, wind energy converter, and method for fixing a tower of a wind energy converter onto a foundation
US20120291380A1 (en) * 2011-05-18 2012-11-22 Norman Tooman Foundation for a Wind Turbine Utilizing a Slurry of Low Viscosity Grout
US20120324813A1 (en) * 2005-03-16 2012-12-27 Illinois Tool Works, Inc. Tower foundation system and method for providing such system
US20130031859A1 (en) * 2010-04-15 2013-02-07 LS Cable &Systems Ltd. Vibration isolator of wind turbine system

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US6891545B2 (en) 2001-11-20 2005-05-10 Koninklijke Philips Electronics N.V. Color burst queue for a shared memory controller in a color sequential display system

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2373798A (en) * 1943-03-10 1945-04-17 Louis W Williams Foundation
US3581508A (en) * 1969-08-18 1971-06-01 Ralph W Junius Uplift pile anchorage structure
US3572223A (en) * 1969-08-26 1971-03-23 Ralph L Vierregger Laterally-disengageable highway marker assembly
US4972642A (en) * 1990-01-03 1990-11-27 Strobl Jr Frederick P Footings for post or beam construction
US5966882A (en) * 1994-12-19 1999-10-19 Naito; Kingo Structure of base of column and construction method for base of column
US6564516B1 (en) * 1998-04-08 2003-05-20 Einar Svensson Support structure for elevated railed-vehicle guideway
US6332303B1 (en) * 2000-02-28 2001-12-25 Nic Engineering Co., Ltd. Method of building underground structure
US20020166302A1 (en) * 2001-05-08 2002-11-14 Paul Ogorchock Footing for sound-barrier walls
US20080302038A1 (en) * 2004-04-02 2008-12-11 Aloys Wobben Method for Erecting a Tower
US20120324813A1 (en) * 2005-03-16 2012-12-27 Illinois Tool Works, Inc. Tower foundation system and method for providing such system
US20060236648A1 (en) * 2005-04-12 2006-10-26 Grundman Curtis M Means for securing the lower end of a wind turbine tower to a foundation
US8051627B2 (en) * 2006-04-30 2011-11-08 General Electric Company Tower adapter, method of producing a tower foundation and tower foundation
US7841143B2 (en) * 2006-07-05 2010-11-30 Vestas Wind Systems A/S Tower construction
US20110154758A1 (en) * 2008-01-16 2011-06-30 Willy Reyneveld Method and Apparatus for Setting Support Columns within a Foundation
US20090320396A1 (en) * 2008-06-27 2009-12-31 Knudsen N Eric Post sleeve assembly
US8011149B2 (en) * 2008-06-27 2011-09-06 Knudsen N Eric Post sleeve assembly
US20100024335A1 (en) * 2008-07-30 2010-02-04 Bianco James S Service tower base installation and protective barrier assembly therefor
US20100146890A1 (en) * 2008-12-16 2010-06-17 Vestas Wind Systems A/S Foundation for enabling anchoring of a wind turbine tower thereto by means of replaceable through-bolts
US7779588B1 (en) * 2009-03-24 2010-08-24 Bruning William E Concrete foundation for supporting a pole thereon
US20120167499A1 (en) * 2009-09-11 2012-07-05 Artepref, S.A.U. Foundation for a Wind Turbine Tower
US20120260592A1 (en) * 2009-10-22 2012-10-18 Amsc Windtec Gmbh Foundation fixing unit, wind energy converter, and method for fixing a tower of a wind energy converter onto a foundation
US20110278850A1 (en) * 2009-12-25 2011-11-17 Mitsubishi Heavy Industries, Ltd. Monopole tower and wind turbine generator having monopole tower
US20130031859A1 (en) * 2010-04-15 2013-02-07 LS Cable &Systems Ltd. Vibration isolator of wind turbine system
US20120291380A1 (en) * 2011-05-18 2012-11-22 Norman Tooman Foundation for a Wind Turbine Utilizing a Slurry of Low Viscosity Grout

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150121784A1 (en) * 2012-06-06 2015-05-07 Gestamp Hybrid Towers, S.L. Ribbed foundation for superstructures and method for producing the foundation
US20200141082A1 (en) * 2017-07-04 2020-05-07 Takeuchi Construction Co., Ltd. Foundation structure for building, and construction method therefor
US10954647B2 (en) * 2017-07-04 2021-03-23 Takeuchi Construction Co., Ltd. Foundation structure for building, and construction method therefor
US11566394B2 (en) * 2019-12-02 2023-01-31 Takeuchi Construction Co., Ltd. Building foundation structure, and construction method therefor

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Owner name: GAMESA INNOVATION & TECHNOLOGY, S.L., SPAIN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GALLARDO HERNANDEZ, RODRIGO;GONZALEZ SANTAMARTA, FRANCISCO JAVIER;DOBLAS TELLECHEA, NAIARA;AND OTHERS;SIGNING DATES FROM 20120611 TO 20120613;REEL/FRAME:028443/0051

STCB Information on status: application discontinuation

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