EP0646686A2 - Méthode et dispositif pour l'application d'armatures additionelles à un élément de construction en béton armé - Google Patents

Méthode et dispositif pour l'application d'armatures additionelles à un élément de construction en béton armé Download PDF

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Publication number
EP0646686A2
EP0646686A2 EP94111515A EP94111515A EP0646686A2 EP 0646686 A2 EP0646686 A2 EP 0646686A2 EP 94111515 A EP94111515 A EP 94111515A EP 94111515 A EP94111515 A EP 94111515A EP 0646686 A2 EP0646686 A2 EP 0646686A2
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EP
European Patent Office
Prior art keywords
groove
reinforcement
concrete component
concrete
additional
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.)
Granted
Application number
EP94111515A
Other languages
German (de)
English (en)
Other versions
EP0646686B1 (fr
EP0646686A3 (fr
Inventor
György Prof. Dr. Ing. Ivanyi
Hans-Günter Krauss
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.)
Rodl Firma GmbH
Original Assignee
Rodl Firma 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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6499361&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0646686(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Rodl Firma GmbH filed Critical Rodl Firma GmbH
Publication of EP0646686A2 publication Critical patent/EP0646686A2/fr
Publication of EP0646686A3 publication Critical patent/EP0646686A3/fr
Application granted granted Critical
Publication of EP0646686B1 publication Critical patent/EP0646686B1/fr
Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/02—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other
    • B24C3/06—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other movable; portable
    • B24C3/062—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other movable; portable for vertical surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/04—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass
    • B24C1/045—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass for cutting
    • 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

  • the invention relates to a method for attaching additional reinforcement to a reinforced concrete component of a building to be renovated, in which the attachment takes place with continued use of the building, in which the concrete component is first machined with a high-pressure water jet, in which the additional reinforcement is reinforcing steel with a rough surface and is fixed to the concrete component at a distance from it, and is embedded in the reinforcing steel reinforcement with concrete mass on the concrete component.
  • the invention also relates to a device for attaching an additional reinforcement to a reinforced concrete component of a building to be renovated, which comprises a device processing the concrete component, which has a rotating spray nozzle connected to a high-pressure water generator for delivering a high-pressure water jet directed against the concrete component.
  • the reinforcing steel reinforcement and the additional concrete mass are provided on the surface of the concrete component.
  • the surface is roughened with the high-pressure water jet, for which purpose a device is used which has the rotating spray nozzle for delivering the high-pressure water jet directed against the concrete component.
  • the strengthening or improvement of the load-bearing strength of the concrete component that can be achieved in this way is relatively small because the additional reinforcement is provided on the surface of the concrete component and because the connection of the additional concrete mass to the roughened surface of the concrete component is a weak point.
  • the method according to the invention solves this problem, characterized in that in the reinforced concrete component a groove having a groove base and two groove walls for receiving the reinforcing steel additional reinforcement is generated by means of the high-pressure water jet with exposure of a reinforcing area and that the reinforcing steel additional reinforcement and the embedding concrete mass are introduced, the concrete mass being brought into connection with the groove base and the groove walls.
  • the additional reinforcement is brought into the interior of the concrete component and the area of the concrete component connected to the additional concrete mass is increased, as a result of which the strengthening or increasing the load-bearing capacity achieved is considerably increased with relatively simple measures.
  • By creating the groove by means of the high-pressure water jet injury or damage to the reinforcement is avoided, a part of which inevitably lies in the region of the groove to be produced, so that a reinforcement region is exposed in the groove.
  • a binder mass adapted to the material of the concrete component is provided, if the reinforcement is embedded all around and over the length in the concrete mass, the reinforcement can extend in one piece along the concrete component and has the additional concrete mass connection with the groove base and the two groove walls.
  • the forceful interaction between the concrete component and the reinforcement is uniform and enlarged over the length of the concrete component to be consolidated.
  • the inserted reinforcing steel can largely be of any length.
  • the structure and the concrete component remain functional during the installation of the additional reinforcement, ie in use.
  • the additional reinforcement reinforcing steel is easily protected against fire and corrosion by embedding.
  • the groove is filled using techniques known per se, by pouring concrete mass from above and spraying concrete mass from below or from the side.
  • the groove is not created mechanically, for example by means of a chisel, which could damage the reinforcement.
  • the reinforcement of the concrete component is also, for example, a prestressing reinforcement, which comprises tendons and cables.
  • the groove is relatively narrow and only suitable for receiving a single additional reinforcement or only two additional reinforcements in cross section.
  • the groove extends to a depth of the concrete component in which the reinforcement runs, but without exposing more than just small areas of the reinforcement.
  • the additional reinforcement can be embedded practically without defects.
  • Composite stiffness and bending capacity of the concrete component supplemented according to the invention correspond to those of a monolithically manufactured concrete component.
  • a tensile zone of the concrete component is provided with the additional reinforcement, thereby improving the load-bearing capacity of the concrete component.
  • the surface of the reinforcing steel of the additional reinforcement is ribbed in the usual way.
  • the reinforcement of the concrete component has two adjacent longitudinal reinforcement members.
  • the groove is produced in such a way that it runs between the two adjacent longitudinal reinforcing members and is spaced from them essentially over the length.
  • the embedding of the longitudinal reinforcement elements is therefore essentially not damaged or broken. Due to the creation of the grooves, longitudinal reinforcement members are exposed in some areas if the position of the longitudinal reinforcement member is not correct, ie if the longitudinal reinforcement member does not run sufficiently parallel to the groove.
  • the reinforcement of the concrete component usually has transverse reinforcement brackets.
  • the groove is produced in such a way that it and the reinforcement bracket cross each other. Exposed reinforcement areas are thus formed by the reinforcement brackets.
  • the groove is produced in such a way that the groove base lies deeper than the exposed areas of the reinforcement bracket, and if the reinforcing steel additional reinforcement is pushed between the groove base and the reinforcement bracket. With this design, the strengthening or load-bearing capacity of the concrete component is further increased.
  • the additional reinforcement must not move when the embedding concrete mass is introduced into the groove, since such movement prevents the desired consolidation.
  • the additional reinforcing steel is therefore fixed using a binding wire, for example on the exposed crossbar areas. It is also possible to form quick cement blocks in the groove and fix them in the binding wires, this is one Simple measure to secure the additional reinforcement at a distance from the groove base and secure against movement when pouring the concrete mass if there are no reinforcement brackets in the groove.
  • the position of the longitudinal reinforcement members adjacent to the planned groove is ascertained and noted on the concrete component.
  • This localization and marking of the position of the longitudinal reinforcing members increases the certainty that when the groove is created, it is created at a sufficient distance from the longitudinal reinforcing members and that its sheathing or embedding remains essentially undamaged.
  • the localization takes place e.g. by means of a magnetic feeler and / or by means of a water jet cutter, which creates a transverse narrow slot.
  • the cross section of the groove is e.g. rectangular.
  • the groove is produced in such a way that it has a trapezoidal cross section with the narrower side on the groove base. This makes it easier to insert the embedding concrete mass.
  • the method according to the invention is applied to a concrete component that is the supporting structure of a bridge. So the bridge superstructure and not the post of the bridge is solidified.
  • the reinforcement is usually formed by longitudinal reinforcement members and transverse reinforcement brackets.
  • a groove in a concrete component can generally be created using a chisel.
  • a machining of the concrete component of the device is provided, which has a high-pressure water generator and a rotating spray nozzle connected to it, which emits the high-pressure water jet. It is conceivable to hold this spray nozzle by hand and move it along the concrete component. As experiments show, it is not possible in this way to produce a groove which is designed to be satisfactorily precise in the longitudinal orientation and in the cross section.
  • Another object of the invention is therefore to provide a device of the type mentioned, the device for processing the concrete component is suitable for creating a groove in the concrete component by means of the high-pressure water jet with improved longitudinal alignment and constant cross-section in a simplified manner.
  • the device according to the invention is solving this problem, characterized in that the spray nozzle is attached to a carriage which can be moved along a guide by means of a drive which is held on the concrete component by means of a holding device, the drive being controllable with respect to the driving speed.
  • the guidance on the concrete component is determined, for example, by an excavator arm pressing the guidance against the concrete component, or generally by the guide being fastened to the concrete component itself.
  • the device according to the invention is useful regardless of the extent to which the load-bearing strength of the concrete component is improved by the additional reinforcement and how the reinforcement proceeds in detail.
  • the guide is usually rail-like and is usually provided on only one side of the groove to be produced.
  • the spray of water moves e.g. straight forward.
  • the spray nozzle emits the high-pressure water jet in a circular motion. This enables the material-removing effect of the high-pressure water jet across the groove width and facilitates the creation of straight, break-free groove walls.
  • two cover pieces are assigned to the spray nozzle which are at a distance from one another which is equal to the width of the groove opening and is smaller than the diameter of the sprayed circle.
  • the covers in connection with the circling water jet simplify and improve the creation of a break-free groove.
  • the one that shines continuous spiral circular path is therefore covered on both side strips opposite the concrete component, as a result of which the generated groove depth is made uniform over the width of the groove.
  • the high pressure water jet is e.g. dispensed with a pressure of 1000 bar and a water volume of 240 liters / min.
  • the depth of the groove depends on how long the beam works at one point, i.e. how fast the car is traveling. That is why the controllability of the travel drive is important.
  • the circulating and inclined high-pressure water jet also works behind or under the reinforcement bars of the reinforcement and is kept constant in cycle speed, pressure and amount of water during a grooving process.
  • one not shown Bridge a concrete component 1, which is to be reinforced on the underside and in which a reinforcement 2 is provided on the underside, which consists of longitudinal reinforcement members 3 and reinforcement brackets 4, which cross each other and are connected to one another with binding wires, not shown.
  • a groove 5 is produced on the underside of the concrete component 1, the groove base 6 of which lies deeper in the concrete component than the reinforcement 2 and the groove walls 7 of which are each a significant distance from the adjacent longitudinal reinforcing member 3 exhibit.
  • the reinforcement brackets 4 cross the groove 5 freely and have so-called exposed areas 9 in the groove.
  • a single reinforcement steel additional reinforcement 10 is provided, which is pushed behind the exposed areas 9 of the reinforcement bracket 4 and is fixed to this by a binding wire 11 each.
  • the groove 5 is filled with concrete mass 12, which has hardened, surrounds the additional reinforcement 10 all around and is connected to the groove base 6 and the two groove walls 7.
  • the device used to attach this additional reinforcement comprises various units, not shown, and a device 13 for producing the groove.
  • the device 13 includes a straight rail-like guide 14, which is placed on the underside of the concrete component 1, and directly on this Dowel 15 is attached.
  • the guide 14 has toothed tracks on both longitudinal sides, into which toothed rollers 16 engage, through which the rest of the device 13 is suspended.
  • the rollers 16 are part of a carriage 17 which receives a transmission, not shown, via which the rollers can be driven by means of a drive 18.
  • the drive 18 is carried by the carriage 17, is supplied with power via a trailing cable 19 and is provided with a control device 20 for the purpose of controlling the driving speed, which can be actuated via a trailing cable 21.
  • a frame 22 which protrudes laterally and carries a rotary drive 23, on which a nozzle head 24 is provided, which is provided with an eccentrically arranged spray nozzle 25, which makes a circular movement due to the rotation of the nozzle head 24.
  • the nozzle head 24 is arranged with its central longitudinal axis inclined to the groove 5 to be produced, so that a high pressure water jet (not shown) leaving the spray nozzle 25 is also inclined.
  • the rotary drive 23 is supplied with power via a trailing cable 26 and high pressure water is supplied to the nozzle head 24 via a trailing hose 27, which comes from a high pressure water generator (not shown).
  • the carriage 20 also carries a frame 28 which forms two side cover pieces 29 which are at a distance from one another which is equal to the width of the groove 5 to be produced and is located directly below the groove to be produced.
  • the frame 28 is arranged between the concrete component 1 and the spray nozzle 24 and the cover pieces 29 move with the spray nozzle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Structural Engineering (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Bridges Or Land Bridges (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Panels For Use In Building Construction (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
EP94111515A 1993-10-04 1994-07-23 Méthode pour l'application d'armatures additionelles à un élément de construction en béton armé Expired - Lifetime EP0646686B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4333782 1993-10-04
DE4333782A DE4333782C2 (de) 1993-10-04 1993-10-04 Verfahren und Vorrichtung zur Anbringung einer Zusatzbewehrung an einem armierten Betonbauteil

Publications (3)

Publication Number Publication Date
EP0646686A2 true EP0646686A2 (fr) 1995-04-05
EP0646686A3 EP0646686A3 (fr) 1995-07-19
EP0646686B1 EP0646686B1 (fr) 1998-01-21

Family

ID=6499361

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94111515A Expired - Lifetime EP0646686B1 (fr) 1993-10-04 1994-07-23 Méthode pour l'application d'armatures additionelles à un élément de construction en béton armé

Country Status (6)

Country Link
EP (1) EP0646686B1 (fr)
AT (1) ATE162582T1 (fr)
DE (2) DE4333782C2 (fr)
DK (1) DK0646686T3 (fr)
ES (1) ES2114099T3 (fr)
GR (1) GR3026106T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103225424A (zh) * 2013-05-02 2013-07-31 陈灿斌 一种交叉、异形孔道型增强结构

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19730174C2 (de) * 1997-07-15 2001-12-06 Bilfinger Berger Bau Bauteil
CN108412220A (zh) * 2017-02-10 2018-08-17 新疆七星建设科技股份有限公司 一种新旧混凝土结合面的处理方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1434075A1 (de) * 1961-05-26 1968-10-31 Ney Gyl Labor Kg Verfahren zur nachtraeglichen bzw. zusaetzlichen Bewehrung von aus Beton bestehenden Bauteilen
DE2451639A1 (de) * 1974-10-30 1976-05-06 Hans Binker Verfahren zur erhoehung der festigkeit von hoelzern und anderen baustoffen
US4081200A (en) * 1976-12-10 1978-03-28 Flow Industries, Inc. Method and apparatus to remove structural concrete
DE3426889A1 (de) * 1983-09-16 1985-05-23 FIP Industriale S.p.A., Selvazzano Dentro, Padova Verfahren und vorrichtung zum bearbeiten bzw. zerstoeren von bebauten bzw. befestigten flaechen mittels eines hydraulischen mediums
US5044139A (en) * 1989-05-23 1991-09-03 D. H. Blattner & Sons, Inc. Method of replacing post tensioned beams
WO1993009314A1 (fr) * 1991-11-04 1993-05-13 Aquajet Systems Ab Dispositif destine au traitement par enlevement de matiere de couches verticales de matiere, et procede de remise en etat de constructions verticales abimees

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1434075A1 (de) * 1961-05-26 1968-10-31 Ney Gyl Labor Kg Verfahren zur nachtraeglichen bzw. zusaetzlichen Bewehrung von aus Beton bestehenden Bauteilen
DE2451639A1 (de) * 1974-10-30 1976-05-06 Hans Binker Verfahren zur erhoehung der festigkeit von hoelzern und anderen baustoffen
US4081200A (en) * 1976-12-10 1978-03-28 Flow Industries, Inc. Method and apparatus to remove structural concrete
DE3426889A1 (de) * 1983-09-16 1985-05-23 FIP Industriale S.p.A., Selvazzano Dentro, Padova Verfahren und vorrichtung zum bearbeiten bzw. zerstoeren von bebauten bzw. befestigten flaechen mittels eines hydraulischen mediums
US5044139A (en) * 1989-05-23 1991-09-03 D. H. Blattner & Sons, Inc. Method of replacing post tensioned beams
WO1993009314A1 (fr) * 1991-11-04 1993-05-13 Aquajet Systems Ab Dispositif destine au traitement par enlevement de matiere de couches verticales de matiere, et procede de remise en etat de constructions verticales abimees

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103225424A (zh) * 2013-05-02 2013-07-31 陈灿斌 一种交叉、异形孔道型增强结构

Also Published As

Publication number Publication date
DE4333782C2 (de) 1999-10-21
EP0646686B1 (fr) 1998-01-21
DE4333782C1 (de) 1995-03-30
EP0646686A3 (fr) 1995-07-19
GR3026106T3 (en) 1998-05-29
ES2114099T3 (es) 1998-05-16
DK0646686T3 (da) 1998-02-09
ATE162582T1 (de) 1998-02-15
DE59405077D1 (de) 1998-02-26

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