US3927497A - Supporting structure of pressure vessel - Google Patents

Supporting structure of pressure vessel Download PDF

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Publication number
US3927497A
US3927497A US414747A US41474773A US3927497A US 3927497 A US3927497 A US 3927497A US 414747 A US414747 A US 414747A US 41474773 A US41474773 A US 41474773A US 3927497 A US3927497 A US 3927497A
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United States
Prior art keywords
pressure vessel
concrete
side wall
supporting structure
set forth
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Expired - Lifetime
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US414747A
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English (en)
Inventor
Toshiaki Yoshinaga
Takanao Wada
Kenji Matsuo
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Hitachi Ltd
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Hitachi Ltd
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    • 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
    • E02D27/38—Foundations for large tanks, e.g. oil tanks

Definitions

  • ABSTRACT A supporting structure of a pressure vessel is disclosed in which a footing formed integral with the lower edge of the side wall of the pressure vessel is placed within an annular recess formed in the concrete foundation and securely held in position by anchor bolts and concerete blocks are disposed in the annular recess inside the pressure vessel thereby holding firmly the footing in position. Intermediate members are interposed between the concrete foundation and the concrete blocks.
  • a portion of a liner support, which is embedded in the concrete foundation within the pressure vessel for supporting thereupon a lining plate, adjacent to the inner wall of the pressure vessel is cut off and is not welded to the lining plate so that the deformation of the lining plate is permitted when the footing is raised.
  • the stress concentration at the joint between the pressure vessel and the lining plate can be prevented, whereby the lining plate may be prevented from being damaged.
  • FIG. 1 A first figure.
  • the present invention relates to a supporting structure of a pressure vessel and especially of a nuclear reactor containment vessel.
  • a nuclear reactor such as a boiling-water type reactor is placed within a reactor containment vessel in order to prevent the release of significant radioactivity to the environment due to the breakdown of the coolant circulation system. Therefore careful consideration has been given in design of a nuclear reactor containment vessel and its supporting structure in order to give the special assurance to the safety of a reactor.
  • the conventional supporting structure of a reactor containment vessel is not satisfactory to give the maximum assurance to thesafety of a nuclear reactor as will be described hereinafter.
  • the footing of the conventional reactor containment vessel is embedded into a concrete foundation and is securely held in position by means ,of anchor bolts. Thereafter concrete is placed to embed the anchor belts in the concrete foundation.
  • the edge of a lining plate which is placed upon the concrete floor within the containment vessel is welded to the inner wall of the containment vessel to provide a bottom thereof.
  • the lining plate provides the airand water-tightness to prevent the release of radioactivity to the'environment.
  • it is welded to upper ends of liner-supports embedded in the concrete floor within the containment vessel.
  • the lining plate welded to the inner wall of a containment vessel is subjected to deformation.
  • the lining plate which is generally thin and is provided for the purpose of pre ventingthe release of radioactivity to the environment must-be free from the stress concentration due to the deformation thereof.
  • the internal pressure acting upon 2 the lining plate is received by the concrete foundation below the lining plate.
  • the most important feature of the present invention resides in the fact that the footing of a pressure vessel is placed within a recess formed in a concrete foundation and is securely held in position by means of anchor bolts embedded in the concrete foundation and concrete blocks with intermediate members being interposedl between the concrete blocks and the concrete foundation.
  • Another important feature of the present invention is provision of the stress relieving means which are disposed adjacent to the joint between the edge of the lining plate and the inner wall of the pressure vessel.
  • FIG. 1 is a vertical sectional view of a first embodiment of the present invention applied to a nuclear reactor containment vessel;
  • FIG. 2 is a fragmentary sectional view, on enlarged scale, illustrating a portion indicated by II in FIG. 1;
  • FIG. 3 is a cross sectional view taken along the line III--III of FIG. 1;
  • FIG. 4 is a cross sectional view taken along the line IVIV of FIG. 3;
  • FIG. 5 is a cross sectional view taken along the line V V of FIG. 4.
  • FIGS. 6 and 7 are sectional views of second and thir embodiments, respectively, of the present invention.-
  • FIG. 1 shows the supporting structure of a reactor containment vessel generally indicated by numeral 1.
  • the containment vessel 1 has a footing generally indicated by 2 and extended from the lower end of a side wall and anchored securely to a concrete floor or foundation 4 by anchor bolts 5. Between the containment vessel 1 and a concrete shield 7 and close to the concrete floor or foundation 4 is formed a pit 9 into which is filled sand.
  • the pit 9 may be formed between the containment vessel 1 and the concrete foundation 4.
  • a lining plate 11 whose edge is welded to the inner wall of the containment vessel 1.
  • the lining plate 11 is also securely joined to liner supports 13 embedded into the concrete foundation 4.
  • the liner supports are securely fixed to the concrete foundation by anchor bolts 14.
  • the anchor bolts and 14 are anchored to a concrete foundation mat 15 below the concrete floor or foundation 4.
  • FIG. 2 is a fragmentary sectional view, on enlarged scale, of the containment vessel 1 shown in FIG. 1.
  • the footing 2 of the containment vessel 1 comprises a flange 22 joined to the inner wall of the containment vessel 1, a base or foot plate 20, 'outer stays 24 joined by welding to the outer wall of the containment vessel 1 and its base plate and inner stays 21 joined by welding to the inner wall of the containment vessel 1, its flange 22 and base plate 20.
  • the flange 22 is connected by a suitable weld joint as at 23 to the inner wall of the containment vessel 1.
  • the base plate 20 is fixed to the lower edge of the side wall of the containment vessel 1 by welding.
  • the footing 2 of the containment vessel 1 is placed in an annular groove 26 in the concrete foundation or floor 4.
  • the footing 2 may be divided into a plurality of sections which may be placed in a plurality of arcuate recesses formed in the concrete floor 4 along the same circle.
  • the base plate 20 is securely held in position by the anchor bolts 5 embedded in the foundation mat 15. After the nuts 6 of the anchor bolts 5 are securely tightened, they are welded to the base plate 20 to prevent the loosening of the nuts 6.
  • the upper surface of the flange 22 substantially flushes with the surface of the concrete floor 4 within the containment vessel 1 when the containment vessel 1 is installed.
  • the anchor bolts 5 are interconnected with each other by an anchor plate 28.
  • the liner supports 13 are embedded within the concrete floor 4 in the form of a grill as best shown in FIG. 3, and are securely held in position by the anchor bolts 14.
  • Upon the lining supports 13 is laid the lining plate 11 and welded thereto.
  • the edge of the lining plate 11 is welded to the flange 22 jointed to the inner wall of the containment vessel 1.
  • the welded portion between the lining plate 11 and the flange 22 is designated by numeral 25. Because the diameter of the bottom of the containment vessel 1 and hence the diameter of the inner plate 11 is generally large, the lining plate 11 is divided into a plurality of sections in order to facilitate the fabrication and transportation, and the component parts of the lining plate 11 are assembled by welding on the field.
  • the joint between the liner supports 13 and the lining plate 11 is best shown in FIG. 4.
  • the sections of the lining plate 11 are welded together along the liner support 13 at 33 and also welded thereto.
  • the upper portion of the web of the liner support 13 adjacent to the lining plate is cut off as indicated by 34 (See FIG. 2) a predetermined length at the end of the liner support 13 adjacent to the inner wall of the containment vessel 1.
  • the section of the cut off portion 34 is shown in FIG. 5, in detail.
  • concrete blocks 36 are disposed between the inner wall of the containment vessel 1 and the inner wall of the annular recess 26 in the concrete floor 4 and between the flange 22 and the base plate 20.
  • An intermediate member 38 made of paper, a thin wooden or metal plate is interposed between the concrete block 36 and the inner wall of the annular recess 26.
  • the upper surface of the concrete block 36 is made into contact with under surfaces of the flange 22 and the lining plate 11.
  • the length of the flange 22 may be so determined as to cover the whole upper surface of the concrete block 36.
  • the portion of the annular recess 26 outside of the footing 2 of the containment vessel 1 defines the bottom of the pit portion 9 into which is filled sand.
  • Sand is also filled in the space above the footing 2. Instead of sand, gravel may be used.
  • the supporting structure of the containment vessel in accordance with the present invention can absorb the external forces.
  • the mode of absorbing the external shocks produced when the internal pressure is increased due to the breakdown of the coolant circulation system (not shown) will be described hereinafter.
  • the pressurized and high temperature steam fills the containment vessel 1 so that the upward forces are exerted to the footing 2.
  • the anchor bolts 5 are exerted with the tension so that they are elongated.
  • the footing 2 is moved upwardly as indicated by the two-dot lines in FIG. 2. That is, the undersurface of the base plate 20 is raised to the level indicated by the two-dot lines A so that the concrete blocks 36 are also raised.
  • the lining plate 11 When the footing 2 is raised or floated, the lining plate 11 is subjected to deformation. Since the cut off portions 34 are provided in the liner supports 13, the stress produced in the lining plate 11 may be sufficiently relieved. That is, at the cut off portions 34, the lining plate 11 is free to bend itself. Therefore the lining plate 11 may be prevented from being damaged, and the joint between the lining plate 11 and the flange 22 may be also prevented from being damaged. Thus the airand water-tightness of the containment vessel 1 may be maintained.
  • cracking of the concrete foundation as well as breaking of the lining plate may be prevented so that the safety of the containment vessel may be much improved. Furthermore the step of tightening the anchor bolts may be eliminated.
  • the second embodiment shown in FIG. 6 is substantially similar in construction to the first embodiment described hereinbefore except additional concrete blocks 40 are placed upon the base plate 20 in the annular recess 26 outside of the containment vessel 1 to prevent the nuts of the anchor bolts 5 from loosening.
  • the concrete blocks 40 are spaced apart from the outer side wall of the annular recess 26 so that sand in the pit portion 9 may fill the space therebetween.
  • the third embodiment shown in FIG. 7 is substantially similar to the second embodiment shown in FIG. except that the concrete blocks 40 fill the annular recess 26 outside of the containment vessel 1 upon the base plate 20 thereof, thereby forming the bottom of the pit portion 9.
  • intermediate members 42 Similar to the intermediate members 38 between the inner wall of the annular recess 26 and the inner concrete block 36 inside the containment vessel 1.
  • a supporting structure of a pressure vessel comprising:
  • footing means secured to a lower edge of a side wall of said pressure vessel for installing the vessel on a concrete foundation
  • said footing means including a base plate fixed on the lower edge of the side wall of said pressure vessel and a lining plate support member joined to the inner surface of said side wall so as to project therefrom,
  • a lining plate mounted on the liner support means and fixed to the lining plate support member at the edge thereof to form the bottom surface of the pressure vessel
  • a first means disposed adjacent to an inner edge of the base plate at an end thereof and to an under surface of the lining plate at the other opposite end thereof for permitting the concrete on the base plate inside the side wall of the vessel to be moved with the base plate, when an unusual pressure increase occurs in the pressure vessel,
  • said liner support means having means for relieving the stress produced in the lining plate when an unusual pressure increase occurs in the pressure vessel said relieving means being disposed at ends thereof facing said first means.
  • a supporting structure of a pressure vessel as set forth in claim 2 further comprising a pit portion formed between the outer surface of the side wall of said pressure vessel and a concrete structure provided on the concrete foundation outside of the side wall of the pressure vessel in communication with the annular recess outside of the pressure vessel, said pit portion containing filler.
  • a supporting structure of a pressure vessel as set forth in claim 4 further comprising concrete blocks fixed on the base plate outside of the pressure vessel and a space formed between said concrete blocks and the outer side wall of the annular recess, said space containing the filler in the pit portion.
  • a supporting structure of a pressure vessel as set forth in claim 1 further comprising a pit portion formed between the outer surface of the side wall of said pressure vessel and a concrete structure provided on the concrete foundation outside of the side wall of the pressure vessel, said pit portion containing filler.
  • a supporting structure of a pressure vessel as set forth in claim 8 further comprising concrete blocks fixed on the base plate outside of the pressure vessel and a space formed between the concrete blocks and the inner side wall of the pit portion, said space containing the filler in the pit portion.
  • a supporting structure of a pressure vessel as set forth in claim 1 further comprising a pit portion formed between the outer surface of the side wall of said pressure vessel and a concrete structure provided on the concrete foundation outside of the side wall of the pressure vessel, and a second means disposed on an inner side surface of the pit portion and adjacent to an outer edge of the base plate at an end thereof, for separating concrete placed on the base plate outside of the pressure vessel from the inner side surface of the pit portion, thereby permitting the concrete to be moved when an unusual pressure increase occurs in the pressure vessel.
  • a supporting structure of a pressure vessel as set forth in claim 2 further comprising a second means disposed on an outer side surface of the annular recess and adjacent to an outer edge of the base plate at an end thereof for separating concrete placed on the base 7 8 plate outside of the pressure vessel from the-outer side 15.

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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)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Foundations (AREA)
US414747A 1972-11-15 1973-11-12 Supporting structure of pressure vessel Expired - Lifetime US3927497A (en)

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JP11389872A JPS5312672B2 (ja) 1972-11-15 1972-11-15

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Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4169569A (en) * 1977-04-06 1979-10-02 Vereinigte Osterreichische Eisen- Und Stahlwerke-Alpine Montan Aktiengesellschaft Base anchorage for heavy machinery
US4365455A (en) * 1977-05-23 1982-12-28 Braine William G Method of building construction
US4438607A (en) * 1982-03-29 1984-03-27 A. O. Smith Harvestore Products, Inc. Method and apparatus for leveling a storage structure
US5105590A (en) * 1983-12-09 1992-04-21 Dykmans Max J Apparatus for constructing circumferentially wrapped prestressed structures utilizing a membrane including seismic coupling
US5177919A (en) * 1983-12-09 1993-01-12 Dykmans Max J Apparatus for constructing circumerentially wrapped prestressed structures utilizing a membrane and having seismic coupling
US5778616A (en) * 1993-01-14 1998-07-14 Beta Machinery Analysis Ltd. Scrubber mounting apparatus
US20080302038A1 (en) * 2004-04-02 2008-12-11 Aloys Wobben Method for Erecting a Tower
US20100154318A1 (en) * 2008-12-23 2010-06-24 Chevron U.S.A. Inc. Ring beam and method for constructing the same
US20100154320A1 (en) * 2008-12-23 2010-06-24 Chevron U.S.A. Inc. Composite concrete roof for an outer lng containment tank and method of making the same
US20100162656A1 (en) * 2008-12-31 2010-07-01 Jin-Jie Lin Middle pour anchor bolt holder
US7762041B1 (en) * 2004-11-03 2010-07-27 Valmont Newmark, Inc. Hybrid metal pole
US20100294778A1 (en) * 2009-05-19 2010-11-25 Kenneth Ryan Harvey Storage Tank With Flexible Shear Pad
US20110041450A1 (en) * 2009-02-04 2011-02-24 Espinosa Thomas M Concrete anchor
CN101614018B (zh) * 2009-03-30 2011-03-16 上海龙净环保科技工程有限公司 大型脱硫防腐蚀箱罐底部基础结构的施工方法
US8381482B2 (en) 2011-07-29 2013-02-26 Simpson Strong-Tie Company, Inc. Anchor bolt locator
US9062452B2 (en) 2012-07-24 2015-06-23 Thomas M. Espinosa Holder for concrete anchors
US9222251B2 (en) 2011-03-18 2015-12-29 Thomas M. Espinosa Concrete anchor coupling assembly and anchor rod holder
US9303399B2 (en) 2012-08-06 2016-04-05 Thomas M. Espinosa Holder and concrete anchor assemblies
US9394706B2 (en) 2013-10-08 2016-07-19 Simpson Strong-Tie Company, Inc. Concrete anchor
US20180313105A1 (en) * 2013-07-29 2018-11-01 Steven P. Morta Modular Security Systm for Above-ground Structures
US20180320400A1 (en) * 2015-04-17 2018-11-08 Gamesa Innovation & Technology, S.L. Joining device of a metal segment to a concrete segment in a hybrid hollow tower
US10370844B2 (en) * 2015-06-03 2019-08-06 Onguard Group Limited Securing assembly
US10480714B2 (en) 2013-03-29 2019-11-19 Ihi Corporation Low temperature liquid tank
US10640999B2 (en) * 2017-07-26 2020-05-05 Steve Cody Earthquake dampening platform for a ground level storage vessel
US11274412B2 (en) 2019-01-31 2022-03-15 Terracon Consultants, Inc. Reinforcement structures for tensionless concrete pier foundations and methods of constructing the same
USRE48981E1 (en) 2014-01-14 2022-03-22 Simpson Strong-Tie Company Inc. Thrust nut
US11365523B2 (en) 2018-11-13 2022-06-21 Terracon Consultants, Inc. Methods for constructing tensionless concrete pier foundations and foundations constructed thereby
US11434617B2 (en) 2014-10-07 2022-09-06 Terraconn Consultants, Inc. Retrofit reinforcing structure addition and method for wind turbine concrete gravity spread foundations and the like
US11661718B2 (en) 2018-07-25 2023-05-30 Terracon Consultants, Inc. Concrete pier foundation with lateral shear reinforcing loops and methods of constructing the same
US11885092B2 (en) 2019-01-31 2024-01-30 Terracon Consultants, Inc. Reinforcement structures for tensionless concrete pier foundations and methods of constructing the same

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US1290093A (en) * 1917-07-21 1919-01-07 Quasi Arc Co Ltd Ship construction.
US1964870A (en) * 1934-01-08 1934-07-03 Russell J De Wees Method of and means for constructing composite liquid tanks
US2301061A (en) * 1940-12-30 1942-11-03 Richard T Logeman Tank construction and the like
US2386958A (en) * 1942-01-08 1945-10-16 Pittsburgh Des Moines Company Spherical type insulated container for liquefied gases
US3605362A (en) * 1969-06-10 1971-09-20 Stone & Webster Eng Corp Connection system for relieving stress in concrete structures
US3791152A (en) * 1972-02-16 1974-02-12 Chicago Bridge & Iron Co Offshore storage system

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US1138394A (en) * 1911-09-14 1915-05-04 William Mueser Reservoir and tank.
US1290093A (en) * 1917-07-21 1919-01-07 Quasi Arc Co Ltd Ship construction.
US1964870A (en) * 1934-01-08 1934-07-03 Russell J De Wees Method of and means for constructing composite liquid tanks
US2301061A (en) * 1940-12-30 1942-11-03 Richard T Logeman Tank construction and the like
US2386958A (en) * 1942-01-08 1945-10-16 Pittsburgh Des Moines Company Spherical type insulated container for liquefied gases
US3605362A (en) * 1969-06-10 1971-09-20 Stone & Webster Eng Corp Connection system for relieving stress in concrete structures
US3791152A (en) * 1972-02-16 1974-02-12 Chicago Bridge & Iron Co Offshore storage system

Cited By (52)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4169569A (en) * 1977-04-06 1979-10-02 Vereinigte Osterreichische Eisen- Und Stahlwerke-Alpine Montan Aktiengesellschaft Base anchorage for heavy machinery
US4365455A (en) * 1977-05-23 1982-12-28 Braine William G Method of building construction
US4438607A (en) * 1982-03-29 1984-03-27 A. O. Smith Harvestore Products, Inc. Method and apparatus for leveling a storage structure
US5105590A (en) * 1983-12-09 1992-04-21 Dykmans Max J Apparatus for constructing circumferentially wrapped prestressed structures utilizing a membrane including seismic coupling
US5177919A (en) * 1983-12-09 1993-01-12 Dykmans Max J Apparatus for constructing circumerentially wrapped prestressed structures utilizing a membrane and having seismic coupling
US5778616A (en) * 1993-01-14 1998-07-14 Beta Machinery Analysis Ltd. Scrubber mounting apparatus
US20080302038A1 (en) * 2004-04-02 2008-12-11 Aloys Wobben Method for Erecting a Tower
US9206617B2 (en) * 2004-04-02 2015-12-08 Aloys Wobben Tower and foundation
US7762041B1 (en) * 2004-11-03 2010-07-27 Valmont Newmark, Inc. Hybrid metal pole
US20100154320A1 (en) * 2008-12-23 2010-06-24 Chevron U.S.A. Inc. Composite concrete roof for an outer lng containment tank and method of making the same
US20100154318A1 (en) * 2008-12-23 2010-06-24 Chevron U.S.A. Inc. Ring beam and method for constructing the same
US20100162656A1 (en) * 2008-12-31 2010-07-01 Jin-Jie Lin Middle pour anchor bolt holder
US8397464B2 (en) 2008-12-31 2013-03-19 Simpson Strong-Tie Company, Inc. Middle pour anchor bolt holder
US9416530B2 (en) 2009-02-04 2016-08-16 Thomas M Espinosa Concrete anchor
US20110041450A1 (en) * 2009-02-04 2011-02-24 Espinosa Thomas M Concrete anchor
US11578492B2 (en) * 2009-02-04 2023-02-14 Centres Holdings, Llc Concrete anchor
US20170037627A1 (en) * 2009-02-04 2017-02-09 Thomas M Espinosa Concrete Anchor
US9097001B2 (en) * 2009-02-04 2015-08-04 Thomas M. Espinosa Concrete anchor
CN101614018B (zh) * 2009-03-30 2011-03-16 上海龙净环保科技工程有限公司 大型脱硫防腐蚀箱罐底部基础结构的施工方法
US20100294778A1 (en) * 2009-05-19 2010-11-25 Kenneth Ryan Harvey Storage Tank With Flexible Shear Pad
US8684220B2 (en) * 2009-05-19 2014-04-01 The Crom Corporation Storage tank with flexible shear pad
US9702139B2 (en) 2011-03-18 2017-07-11 Cetres Holdings, Llc Concrete anchor coupling assembly and anchor rod holder
US10626596B2 (en) 2011-03-18 2020-04-21 Cetres Holdings, Llc Concrete anchor coupling assembly and anchor rod holder
US11414855B2 (en) 2011-03-18 2022-08-16 Cetres Holdings, Llc Concrete anchor coupling assembly and anchor rod holder
US9222251B2 (en) 2011-03-18 2015-12-29 Thomas M. Espinosa Concrete anchor coupling assembly and anchor rod holder
US10047517B2 (en) 2011-03-18 2018-08-14 Cetres Holdings, Llc Concrete anchor coupling assembly and anchor rod holder
US10047516B2 (en) 2011-03-18 2018-08-14 Cetres Holdings, Llc Concrete anchor coupling assembly and anchor rod holder
US8621816B1 (en) 2011-07-29 2014-01-07 Simpson Strong-Tie Company, Inc. Anchor bolt locator
US8381482B2 (en) 2011-07-29 2013-02-26 Simpson Strong-Tie Company, Inc. Anchor bolt locator
US9062452B2 (en) 2012-07-24 2015-06-23 Thomas M. Espinosa Holder for concrete anchors
US10676917B2 (en) 2012-08-06 2020-06-09 Cetres Holdings, Llc Holder and concrete anchor assemblies
US10202753B2 (en) 2012-08-06 2019-02-12 Cetres Holdings, Llc Holder and concrete anchor assemblies
US9303399B2 (en) 2012-08-06 2016-04-05 Thomas M. Espinosa Holder and concrete anchor assemblies
US11466447B2 (en) 2012-08-06 2022-10-11 Cetres Holdings, Llc Holder and concrete anchor assemblies
US10480714B2 (en) 2013-03-29 2019-11-19 Ihi Corporation Low temperature liquid tank
US20180313105A1 (en) * 2013-07-29 2018-11-01 Steven P. Morta Modular Security Systm for Above-ground Structures
US10961740B2 (en) * 2013-07-29 2021-03-30 Morta Steven P Modular security system for above-ground structures
US10385584B2 (en) * 2013-07-29 2019-08-20 Morta Steven P Modular security system for above-ground structures
US9945115B2 (en) 2013-10-08 2018-04-17 Simpson Strong-Tie Company, Inc. Concrete anchor
US9394706B2 (en) 2013-10-08 2016-07-19 Simpson Strong-Tie Company, Inc. Concrete anchor
USRE48981E1 (en) 2014-01-14 2022-03-22 Simpson Strong-Tie Company Inc. Thrust nut
US11814808B2 (en) 2014-10-07 2023-11-14 Terracon Consultants, Inc. Retrofit reinforcing structure addition and method for wind turbine concrete gravity spread foundations and the like
US11434617B2 (en) 2014-10-07 2022-09-06 Terraconn Consultants, Inc. Retrofit reinforcing structure addition and method for wind turbine concrete gravity spread foundations and the like
US10704285B2 (en) * 2015-04-17 2020-07-07 Siemens Gamesa Renewable Energy Innovation & Technology, S.L. Joining device of a metal segment to a concrete segment in a hybrid hollow tower
US20180320400A1 (en) * 2015-04-17 2018-11-08 Gamesa Innovation & Technology, S.L. Joining device of a metal segment to a concrete segment in a hybrid hollow tower
US10370844B2 (en) * 2015-06-03 2019-08-06 Onguard Group Limited Securing assembly
US10640999B2 (en) * 2017-07-26 2020-05-05 Steve Cody Earthquake dampening platform for a ground level storage vessel
US11661718B2 (en) 2018-07-25 2023-05-30 Terracon Consultants, Inc. Concrete pier foundation with lateral shear reinforcing loops and methods of constructing the same
US11365523B2 (en) 2018-11-13 2022-06-21 Terracon Consultants, Inc. Methods for constructing tensionless concrete pier foundations and foundations constructed thereby
US11976431B2 (en) 2018-11-13 2024-05-07 Terracon Consultants, Inc. Methods for constructing tensionless concrete pier foundations and foundations constructed thereby
US11274412B2 (en) 2019-01-31 2022-03-15 Terracon Consultants, Inc. Reinforcement structures for tensionless concrete pier foundations and methods of constructing the same
US11885092B2 (en) 2019-01-31 2024-01-30 Terracon Consultants, Inc. Reinforcement structures for tensionless concrete pier foundations and methods of constructing the same

Also Published As

Publication number Publication date
JPS5312672B2 (ja) 1978-05-02
JPS4971396A (ja) 1974-07-10

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