EP1079044B1 - Structure de support - Google Patents

Structure de support Download PDF

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Publication number
EP1079044B1
EP1079044B1 EP00307351A EP00307351A EP1079044B1 EP 1079044 B1 EP1079044 B1 EP 1079044B1 EP 00307351 A EP00307351 A EP 00307351A EP 00307351 A EP00307351 A EP 00307351A EP 1079044 B1 EP1079044 B1 EP 1079044B1
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EP
European Patent Office
Prior art keywords
component
constructional
components
space
structural
Prior art date
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Expired - Lifetime
Application number
EP00307351A
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German (de)
English (en)
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EP1079044A3 (fr
EP1079044A2 (fr
Inventor
John Oswald Hare
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.)
HARE, JOHN OSWALD
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Hare John Oswald
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Publication date
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Publication of EP1079044A2 publication Critical patent/EP1079044A2/fr
Publication of EP1079044A3 publication Critical patent/EP1079044A3/fr
Application granted granted Critical
Publication of EP1079044B1 publication Critical patent/EP1079044B1/fr
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/12—Mounting of reinforcing inserts; Prestressing
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00—Working measures on existing buildings
    • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements

Definitions

  • This invention relates to structural support especially, but not exclusively, to supporting existing roof panel structures of concrete and similar materials.
  • FR-A-2722819 discloses a method according to the pre-characterising part of claim 1 and a structure according to the pre-characterising part of claim 12. Its apparatus for the relative wedging or pressurising of two constructional components includes a pocket which comprises at least two opposite openings and which, once interposed between the two constructional components, contains a filler material of the mortar or synthetic resin type which has been injected in a liquid form through one of the two openings and is capable of solidifying at ambient temperature.
  • the method consists of positioning the apparatus between the two constructional components with the two openings of the pocket free, injecting into the pocket the filler material through a first opening, until complete evacuation through the second opening of the air initially contained in the pocket, closing the second opening, and then, if appropriate, continuing the injection until the desired pressurization of the two constructional elements is achieved.
  • US-A-4,191,496 discloses a gas-bag supported structural foundation comprising at least one flexible, substantially air-tight bag adapted to be placed on the ground; a floor structure superimposed on the bag; a source of gas under pressure; conduits connecting the source of gas under pressure to the bag, and the bags to atmosphere; and, in the conduits, valve means responsive to changes in floor level and operative to direct the flow of gas to and from the bag as required to maintain the floor in a substantially level condition.
  • Ground suction is broken by raising one side of the tank with the lifting bags, placing supports as far as possible under the tank rim and depressurising the bags to rock the other side of the tank off the ground.
  • a fulcrum method is also applied to use the partial weight of the tank as a leverage force to raise opposite sides of the tank alternately.
  • RAAC reinforced autoclaved aerated concrete
  • RAAC panels have been used over the past twenty years or so as not only roof panels but also floor and wall components and have also been sold as not only structural members but also as insulating materials.
  • a constructural component such as an existing RAAC roof panel
  • a constructural component such as an existing RAAC roof panel
  • a first aspect of the invention resides in a method comprising inserting in a space between a constructional component and a structural component a hollow element, and introducing a fluid into said hollow element, such that it acts between the two components to generate a force therebetween deflecting said constructional component away from said structural component and thus pre-stressing said constructional component , characterised in that said hollow element is inflated from a deflated or partially inflated condition to act between the two components as aforesaid and in that, once said constructional component has been deflected away by a required degree, spacing means comprising a self-setting material is placed in at least part of the remainder of said space not occupied by said hollow element and in engagement with said two components and in that said self-setting material subsequently sets rigidly.
  • a second aspect of the invention resides in a structure comprising: a constructional component; an associated structural component supporting said constructional component; and a hollow element inserted in a space between the constructional component and the structural component and deflecting said constructional component away from said structural component, characterised in that said hollow element is in an inflated condition and in that the structure includes rigid spacing means comprised of self-set material in at least part of a remainder of said space not occupied by said hollow element and in engagement with both of the components.
  • the inflatable element may be in the form of an inflatable tube cut to a required length and having its ends sealed in a fluid-tight manner.
  • the element may also be provided with a valve for inflation purposes.
  • the inflatable element is formed from a generally flat hose, preferably of composite rubber with plastics, such as, polyester and/or nylon, reinforcing webbing and a heavy duty, protective outer plastics sheath, which is cut to a required length, as will be explained in more detail hereinbelow, and has its opposed ends folded at least once and then clamped to provide a fluid-tight seal at each end.
  • a valve is provided in the wall of the tube in a conventional manner, for inflation purposes.
  • the ends of the tube or hose do not have to be glued or vulcanised to provide the required fluid-tight seal, as it has been found that gluing or vulcanising does not yield a sufficiently effective bond between the tube or hose material to effect a fluid-tight seal which can withstand pressures of up to 250 p.s.i. (1,725 kPa/17.25 bar).
  • a flat roof panel spaced from a structural steel member is deflected with respect to the member to increase the spacing therebetween, an inflatable element, preferably elongate, in a non- or partially- inflated condition, is inserted in the space between the two components and the element is inflated to a predetermined pressure in dependence upon a known pressure/deflection relationship, to cause the panel to be deflected away from the member by a required amount.
  • rigid spacing means such as a structural cement, concrete, mortar or grout, can be placed in at least part of the remainder of the space not occupied by the inflated element and in engagement with both components.
  • At least the constructional component of the spaced components may be caused, by the resulting forces, to move with respect to and away from the other component and this effect is particularly useful when the invention is applied to existing roof panels, such as, RAAC roof panels, which have experienced long-term in-service deflections.
  • inflatable tubes are employed and the amount of movement of the roof panels away from an associated structural member (METSEC lattice beam), such as a structural steel cradle, can be determined in advance in dependence upon a known pressure/deflection relationship which can be represented in the form of a graph.
  • MEMSEC lattice beam such as a structural steel cradle
  • one or more inflatable elements can be inflated to a predetermined pressure in dependence upon a given inflation pressure/deflection relationship.
  • the other structural component may be in the form of a cradle, preferably a structural steel cradle, such as one constructed from components manufactured and sold by METSEC plc, in which case the inventive method may be used to refurbish an existing flat roof structure of RAAC roof panels, with the structural cradle, as the other structural component, being connected to existing main beams supporting the roof panels.
  • Such a structural steel cradle may comprise secondary beams or joists supported on primary beams or joists which, in turn, are preferably bolted or bracketed to the existing, roof panel-supporting main beams.
  • the top flanges of the secondary beams or joists may be suitably packed-up to follow the general contours of the underside/soffit of the roof panel(s).
  • the roof panel(s) or other constructional component can be deflected away from the cradle or other structural component by a predetermined amount in dependence upon a known inflation pressure/deflection relationship.
  • FIG. 1 a typical grid plan of a flat roof structure with RAAC roof panels is shown in Figure 1 and comprises a structural steel cradle consisting of primary beams or joists 1 positioned at, say, 1.8m centres and supported on a continuous or sectional angle 3 bolted to existing roof beams or joists 4 which, in-service, have supported the RAAC roof panels which have undergone, again in-service, deflection in a downward direction between adjacent existing beams or joists 4.
  • the structural steel cradle further comprises secondary beams or joists 2 intersecting and connected to the primary beams or joists 1 and positioned at one third of the span between the existing beams or joists 4.
  • each secondary beam or joist 2 is suitably packed-up to follow the general contours of the underside of the corresponding RAAC roof panels (10 in Figure 5 ).
  • the length of the tube 20 is determined by the corresponding dimensions of the beams or joists 1, 2 of the structural steel cradle and the RAAC roof panels.
  • the or each tube 20 is inflated to a corresponding pressure in accordance with a given relationship, as shown graphically in Figure 8 .
  • a required upward deflection of a roof panel 10 of, say, 5 mm necessitates the corresponding inflatable tube(s) 20 to be inflated to a pressure of 20.00 psi (138 kPa/1.38 bar), as can be seen from the graph of Figure 8 .
  • inflation of the tube 20 to the required pressure generates a force which acts between the associated beam or joist 1,2 and the roof panel 10, to cause the latter to deflect upwardly away from the former by the required distance, whilst also pre-stressing or pre-loading the roof panel 10 (and the beam or joist 1,2).
  • two inflatable tubes are employed and are shown in their inflated condition at 20'.
  • the inflated tubes 20' carry out the same function as the single tube 20' of Figure 5 but extend along respective opposed edges of the lipped flange or plate 7 of the secondary beam or joist 2, with the structural self-settable mortar 6 located therebetween.
  • the inflated tubes 20' can be deflated and removed for subsequent re-use.
  • Figure 7 shows a more detailed view of the arrangement of the tubes 20', with one tube extending along the length of the beam or joist 1,2 and a pair of shorter tubes 20' located along the opposed edge of the lipped flange or plate 7, with a central gap 31 between adjacent ends of the pair of tubes 20' and respective gaps 32 between their other opposed ends and the adjacent intersecting beams or joists 2,1.
  • structural self-setting mortar is pumped through the gap 31 in the direction of the arrow A and flows between the opposed, inflated tubes 20', exiting at opposed end gaps 32, to ensure that the whole of the space defined between the opposed inflated tubes 20', the lipped upper flange or plate 7 of the beam or joist 1,2 and the underside of the associated RAAC roof panel 10, is filled with mortar.
  • the pressure within the inflated tubes 20' is determined by the graph shown in Figure 8 , to provide the required upward deflection of the roof panel 10 away from the beam or joist 1,2.
  • the inflatable tube 20 shown in Figure 9 this comprises a flexible synthetic plastics or rubberized flat tube or hose cut to the required length and having its ends sealed in a fluid-tight manner by folding, as shown at 21.
  • the tube 20 comprises plastics reinforcing webbing embedded in its walls, with a heavy duty, protective outer plastics sheath.
  • a pair of clamping plates 22 is applied to each folded end 21 of the tube 20, to ensure the integrity of the fluid-tight seal and to strengthen the ends of the tube against failure during and after inflation.
  • a valve 24 is provided for the inflation and/or deflation of the tube 20, to which a pressure gauge may be attached to monitor the pressure within the tube 20 during inflation.

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  • Architecture (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Roof Covering Using Slabs Or Stiff Sheets (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Building Environments (AREA)

Claims (18)

  1. Une méthode qui consiste dans l'insertion d'un élément creux (20) dans un espace entre un composant de construction (10) et un composant structurel (2), et dans l'introduction d'un fluide dans ledit élément creux (20) de telle sorte qu'il agit entre les deux composants (2, 10) pour générer une force par laquelle ledit composant (10) est éloigné dudit composant structurel (2) et créant de ce fait une précontrainte dans ledit composant (10), caractérisé en ce que ledit élément creux (20) est gonflé à partir d'un état dégonflé ou partiellement gonflé afin d'agir entre les deux composants (2, 10) comme ci-dessus mentionné et en ce que une fois que ledit composant (10) a été dévié d'un degré requis, les moyens d'espacement (6) comprenant un matériau auto-durcissant est placé dans au moins une partie du reste de l'espace non occupé par ledit élément creux (20) et en engagement avec lesdits deux composants (2, 10) et en ce que ledit matériau auto-durcissant durcisse de façon rigide par la suite.
  2. Une méthode selon la revendication 1, dans laquelle le matériau auto-durcissant est pompé dans au moins une partie dudit reste de l'espace.
  3. Une méthode selon la revendication 1 ou 2, dans laquelle lesdits moyens d'espacement comprennent un ciment, un béton, un mortier ou un coulis structurel.
  4. Une méthode selon l'une quelconque des revendications 1 à 3, dans laquelle plus d'un élément gonflable (20) est inséré dans ledit espace.
  5. Une méthode selon l'une quelconque des revendications précédentes, dans laquelle le ou chaque élément gonflable (20) est de forme allongée.
  6. Une méthode selon la revendication 5, dans laquelle le ou chaque élément gonflable (20) est coupé à une longueur exigée.
  7. Une méthode selon la revendication 5 ou 6, dans laquelle un ou chacun des éléments gonflables (20) a ses extrémités opposées (21) scellées de façon étanche avant d'être gonflé.
  8. Une méthode selon la revendication 7, dans laquelle les dites extrémités opposées (21) sont scellées de façon étanche par pliure au moins une fois puis fixées par crampon (22).
  9. Une méthode selon l'une quelconque des revendications précédentes, dans laquelle ledit composant de construction (10) est composé de béton renforcé, autoclave ou cellulaire.
  10. Une méthode selon l'une quelconque des revendications précédentes, dans laquelle un ou chaque élément (20) est gonflé à une pression prédéterminée selon un rapport de gonflement pression/déviation dépendant dudit degré de déviation.
  11. Une méthode selon une quelconque des revendications précédentes, dans laquelle ladite déviation agit pour contrer une déviation en service à long terme.
  12. Une structure comprenant : un composant (10) de construction ; un composant structurel associé (2) soutenant ledit composant de construction (10) ; et un élément creux (20) inséré dans un espace entre le composant de construction (10) et le composant structurel (2) et déviant le composant dit de construction (10) loin dudit composant structurel (2),
    caractérisé en ce que ledit élément creux (20) est gonflé et en ce que la structure inclut des moyens rigides d'espacement (6) constitué d'un matériau auto-durcissant dans au moins une partie du reste dudit espace non-occupé par ledit élément creux (20) et engagé avec les deux composants (2, 10).
  13. Une structure selon la revendication 12, dans laquelle les moyens rigides d'espacement (6) sont un ciment, un béton, un mortier ou un coulis structurel.
  14. Une structure selon la revendication 12 ou 13, dans laquelle plus d'un élément creux (20) gonflé se trouvent dans l'espace entre ledit composant de construction (10) et ledit composant structurel (2).
  15. Une structure selon l'une quelconque des revendications 12 à 14, dans laquelle le ou chaque élément (20) est de forme allongée.
  16. Une structure selon la revendication 15, dans laquelle le ou chaque élément (20) a ses extrémités opposées (21) scellées de façon étanche.
  17. Une structure selon la revendication 15 ou 16, dans laquelle lesdites extrémités opposées (21) sont scellées de manière étanche par au moins une pliure puis fixées par crampon (22).
  18. Une structure selon l'une quelconque des revendications 12 à 17, dans laquelle ledit composant de construction (10) est composé de béton renforcé, autoclave, cellulaire.
EP00307351A 1999-08-25 2000-08-25 Structure de support Expired - Lifetime EP1079044B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9920091.7A GB9920091D0 (en) 1999-08-25 1999-08-25 Structural support
GB9920091 1999-08-25

Publications (3)

Publication Number Publication Date
EP1079044A2 EP1079044A2 (fr) 2001-02-28
EP1079044A3 EP1079044A3 (fr) 2002-11-06
EP1079044B1 true EP1079044B1 (fr) 2010-08-11

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EP00307351A Expired - Lifetime EP1079044B1 (fr) 1999-08-25 2000-08-25 Structure de support

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EP (1) EP1079044B1 (fr)
AT (1) ATE477381T1 (fr)
DE (1) DE60044798D1 (fr)
GB (2) GB9920091D0 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6548546B2 (ja) * 2015-10-09 2019-07-24 鹿島建設株式会社 プレキャストブロックの接合方法
CN106545162A (zh) * 2017-01-16 2017-03-29 曹龙 一种几何形状的混凝土模板密封装置
CN109930839A (zh) * 2019-04-25 2019-06-25 中建八局轨道交通建设有限公司 用于调节钢筋间距的折叠卡具及使用方法
CN114033210A (zh) * 2021-11-15 2022-02-11 魏永水 建筑结构加固用钢绞线网片张拉紧固组件

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3822861A (en) * 1973-05-21 1974-07-09 S Scott Inflatable form breaker for molded construction

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4191496A (en) * 1977-01-05 1980-03-04 Becker Robert F Gas-bag supported structural foundation
AU3124593A (en) * 1991-09-12 1994-05-24 A.R. Watson Corporation Tank lifting methods
WO1995007400A1 (fr) * 1993-09-09 1995-03-16 William George Edscer Procede de renforcement d'un mur creux
FR2722819A1 (fr) * 1994-07-19 1996-01-26 Hedin Jean Luc Poche et procede de calage ou de mise en pression de deux elements de construction

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3822861A (en) * 1973-05-21 1974-07-09 S Scott Inflatable form breaker for molded construction

Also Published As

Publication number Publication date
DE60044798D1 (de) 2010-09-23
GB9920091D0 (en) 1999-10-27
GB0021100D0 (en) 2000-10-11
GB2355483A (en) 2001-04-25
ATE477381T1 (de) 2010-08-15
EP1079044A3 (fr) 2002-11-06
GB2355483B (en) 2003-12-24
EP1079044A2 (fr) 2001-02-28

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