EP0646686B1 - Method for adding additional reinforcement to a reinforced concrete building element - Google Patents
Method for adding additional reinforcement to a reinforced concrete building element Download PDFInfo
- Publication number
- EP0646686B1 EP0646686B1 EP94111515A EP94111515A EP0646686B1 EP 0646686 B1 EP0646686 B1 EP 0646686B1 EP 94111515 A EP94111515 A EP 94111515A EP 94111515 A EP94111515 A EP 94111515A EP 0646686 B1 EP0646686 B1 EP 0646686B1
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- Prior art keywords
- groove
- reinforcement
- additional
- concrete
- created
- 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.)
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Classifications
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- 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
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- 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
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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
- 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 attachment an additional reinforcement on a reinforced concrete component of a building to be renovated, in which the Attachment with continued use of the structure takes place, in which the concrete component first machined with a high pressure water jet is where the additional reinforcement reinforcing steel with a rough surface and with the concrete component Distance from this is set, and at Reinforcing steel additional reinforcement with concrete mass on Concrete component is embedded.
- An object of the invention is therefore a method to create the type mentioned at which is achievable with the additional reinforcement Strengthening or increasing the load-bearing capacity of the Concrete component is enlarged.
- the invention The method solves this problem, the characteristics of claim 1.
- the structure and the concrete component remain during the attachment of the additional reinforcement is functional, i.e. in use.
- the additional reinforcement reinforcing steel is also easy by embedding protected against fire and corrosion. Filling up the groove is made using techniques known per se, by from concrete mass injected below or from the side becomes.
- the groove is not mechanical, e.g. by means of of a chisel that violate the armouring could.
- the reinforcement of the concrete component is e.g. also a prestressing armature, which tendons and includes ropes.
- the groove is relatively narrow and only to accommodate a single additional reinforcement or of only two additional reinforcements in cross section suitable. The groove extends to a depth the concrete component in which the reinforcement runs, but without more than just small areas of reinforcement to expose.
- Bond rigidity and bending capacity of the invention supplemented concrete component correspond to those of a monolithically manufactured concrete component. It becomes a tensile zone of the concrete component with the additional reinforcement provided and thereby the load capacity of the concrete component improved.
- the surface of the Reinforcing steel of the additional reinforcement is common Way ripped.
- the reinforcement of the concrete component shows two adjacent longitudinal reinforcement links.
- the groove is created so that it between the two adjacent longitudinal reinforcement members runs and essentially over the Distance from these.
- the embedding the longitudinal reinforcement members is therefore essentially not damaged or broken.
- Longitudinal reinforcement links are due to the grooving exposed in certain areas if the position of the Longitudinal reinforcing member is not correct, i.e. if the longitudinal reinforcement link is not sufficient runs parallel to the groove.
- the reinforcement of the concrete component shows transverse reinforcement bracket.
- the groove is created so that it and the reinforcement bracket cross each other. So they are exposed Reinforcement areas from the reinforcement bracket educated.
- the groove is generated so that the It is only deeper than the exposed areas the reinforcement bracket, and if the reinforcement steel additional reinforcement between the groove bottom and the Reinforcement bar is pushed.
- the consolidation or load-bearing capacity of the Concrete component further increased.
- the additional reinforcement may change when the do not move the embedding concrete mass into the groove, since such a movement is the desired consolidation prevents.
- the additional reinforcing steel is therefore fixed using a binding wire, e.g. on the exposed crossbar areas. It is also possible to form quick cement blocks in the groove and fix it in these tie wires. This is one simple measure to use the additional reinforcement Distance from the bottom of the groove and against movement when inserting the concrete mass secured when there are no reinforcement brackets in the groove.
- the cross section of the groove is e.g. rectangular. Especially however, it is expedient and advantageous if the groove is created so that it has a trapezoidal cross section with the narrower side at the bottom of the groove having. This facilitates the introduction of the embedding concrete mass.
- the supporting structure of a Bridge is. So it will be the bridge superstructure and not the post of the bridge solidified.
- the reinforcement usually of longitudinal reinforcement and transverse Reinforcement brackets formed.
- a device processing the concrete component is provided, the one high pressure water generator and one orbiting spray nozzle connected to it, which emits the high pressure water jet. It is conceivable to hold this spray nozzle by hand and along to move the concrete component. Like attempts no groove can be created in this way, those in the longitudinal direction and in cross section is designed to be satisfactorily accurate.
- the spray of water moves e.g. straightforward forward.
- the spray nozzle gives the high pressure water jet circling. This enables the material-removing effect of the high pressure water jet across the groove width and facilitates the Generation in a straight line, free of breakouts Groove walls.
- the covers in connection with the circling water jet simplify and improve production an escape-free groove.
- the one that shines continuous spiral circular path is on both Side stripes covered opposite the concrete component, whereby the generated groove depth over the Width of the groove is evened out.
- the high pressure water jet is e.g. with a print of 1000 bar and a water volume of 240 liters / min submitted.
- the groove depth depends on how as long as the beam works in one place, i.e. how the driving speed of the car is great. That's why the controllability of the travel drive is important.
- the circling and also sloping High pressure water jet also works behind or under reinforcement bars of the reinforcement and is in Circular speed, pressure and amount of water a grooving process kept constant.
- one not shown Bridge a concrete component 1 on the bottom is to be reinforced and in the bottom a reinforcement 2 is provided, which consists of longitudinal reinforcement members 3 and reinforcement brackets 4, that cross each other and with not shown Binding wires are connected together. Between two neighboring, parallel to each other and spaced longitudinal reinforcing members 3 is at the bottom of the Concrete component 1 creates a groove 5, the bottom of the groove 6 is lower in the concrete component than the reinforcement 2 and the groove walls 7 each have a clear one Distance from the adjacent longitudinal reinforcing member 3 exhibit.
- the reinforcement bracket 4 cross the groove 5 freely and have so-called exposed areas 9 in the groove on.
- a single reinforcing steel additional reinforcement 10 provided, which behind the exposed areas 9 of the reinforcement bracket 4 is pushed and on this by a binding wire 11 is set.
- the groove 5 is with concrete mass 12 filled, which has hardened, the additional reinforcement 10 encloses all around and with the groove base 6 and the two groove walls 7 holding connected is.
- the one used to attach this additional reinforcement Device includes various not shown Units and a device 13 for generating the groove.
- a straight rail-like device belongs to the device 13 Guide 14 to the bottom of the concrete component 1 is created, and on this immediately by Dowel 15 is attached.
- the guide 14 instructs toothed tracks on both long sides, in which toothed rollers 16 grip, through which the rest of the device 13 is suspended.
- the casters 16 are part of a carriage 17, which is not shown Gearbox takes over which the rollers can be driven by a drive 18. Of the Drive 18 is carried by the carriage 17, is over a Trailing cable 19 is powered and is for the purpose Control the drive speed with one Control device 20 provided via a Trailing cable 21 can be actuated.
- a frame 22 is provided on the carriage 17 protrudes laterally and carries a rotary drive 23 a nozzle head 24 is provided, which with a eccentrically arranged spray nozzle 25 provided that is due to the rotation of the nozzle head 24 makes a circular motion.
- the nozzle head 24 is with its central longitudinal axis inclined towards generating groove 5 arranged so that a High pressure water jet, not shown, leaving the spray nozzle 25 is also inclined.
- Power is supplied and the nozzle head 24 is via a Drag hose 27 high pressure water supplied, the from a high pressure water generator, not shown comes from.
- the carriage 20 also carries a frame 28, which forms two side cover pieces 29 which have a distance from each other that is equal to Width of the groove 5 to be generated is and immediately is located under the groove to be created.
- the frame 28 is between the concrete component 1 and the spray nozzle 24 and the cover pieces 29 move with the spray nozzle.
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- 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)
- Reinforcement Elements For Buildings (AREA)
- Bridges Or Land Bridges (AREA)
- Joining Of Building Structures In Genera (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
- Panels For Use In Building Construction (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Anbringung einer Zusatzbewehrung an einem armierten Betonbauteil eines zu sanierenden Bauwerkes, bei dem die Anbringung bei fortdauerndem Gebrauch des Bauwerkes erfolgt, bei dem zunächst das Betonbauteil mit einem Hochdruckwasserstrahl abtragend bearbeitet wird, bei dem die Zusatzbewehrung Armierungsstahl mit rauher Oberfläche ist und am Betonbauteil mit Abstand von diesem festgelegt wird, und bei dem Armierungsstahl-Zusatzbewehrung mit Betonmasse am Betonbauteil eingebettet wird.The invention relates to a method for attachment an additional reinforcement on a reinforced concrete component of a building to be renovated, in which the Attachment with continued use of the structure takes place, in which the concrete component first machined with a high pressure water jet is where the additional reinforcement reinforcing steel with a rough surface and with the concrete component Distance from this is set, and at Reinforcing steel additional reinforcement with concrete mass on Concrete component is embedded.
Es gibt Fälle, in denen ein armiertes Betonbauteil Belastungen ausgesetzt werden soll, die höher sind, als ursprünglich geplant ist, oder in denen das armierte Betonbauteil aufgrund einer falschen Berechnung zu schwach dimensioniert ist, und in denen das armierte Betonbauteil nachträglich verfestigt wird. Auch eine Koppelfuge zwischen zwei Betonbauteilen ist häufig eine Schwachstelle, die nachträglich verfestigt werden soll. There are cases where a reinforced concrete component Exposure to higher loads than originally planned, or where that reinforced concrete component due to a wrong one Calculation is dimensioned too weak, and in which the reinforced concrete component subsequently solidifies becomes. Also a coupling joint between two Concrete components is often a weak point that should be solidified subsequently.
Bei einem bekannten (DIN 18551) Verfahren der eingangs genannten Art werden die Armierungsstahl-Zusatzbewehrung und die zusätzliche Betonmasse an der Oberfläche des Betonbauteils vorgesehen. Die Oberfläche wird mit dem Hochdruckwasserstrahl aufgerauht, wozu von Hand ein Gerät benutzt wird, das die kreisende Spritzdüse zur Abgabe des gegen das Betonbauteil gerichteten Hochdruckwasserstrahls aufweist. Die auf diese Weise erreichbare Verfestigung bzw. Verbesserung der Tragfestigkeit des Betonbauteils ist relativ gering, weil die Zusatzbewehrung an der Oberfläche des Betonbauteils vorgesehen ist und weil die Verbindung der zusätzlichen Betonmasse mit der aufgerauhten Oberfläche des Betonbauteils eine Schwachstelle ist.In a known (DIN 18551) method of reinforcement steel reinforcement and the additional concrete mass provided the surface of the concrete component. The Surface is made with the high pressure water jet roughened, for which a device is used by hand, the orbiting spray nozzle for dispensing the counter the concrete component directed high pressure water jet having. The solidification that can be achieved in this way or improve the load-bearing capacity of the Concrete component is relatively small because of the additional reinforcement on the surface of the concrete component is provided and because the connection of the additional Concrete mass with the roughened surface of the concrete component is a weak point.
Es ist bekannt (DE-A-24 51 639), in einem Betonträger eine Zusatzbewehrung in Form eines Stabs aus glasfaserverstärktem Material vorzusehen, indem eine Nut vorgesehen wird, in die diese Zusatzbewehrung eingebracht wird und in die von oben her eine Epoxydharzmasse gegossen wird. Auch ist es bekannt (DE-A-34 26 889), an einem Betonbauteil eine Nut unter Freilegung eines Armierungsbereiches mittels eines Hochdruckwasserstrahls zu erzeugen und die Nut mit einem Kunstharzmörtel auszufüllen.It is known (DE-A-24 51 639) in an additional reinforcement in a concrete beam Form a rod made of glass fiber reinforced material by using a groove is provided, in which this additional reinforcement is introduced and in the an epoxy resin mass is poured from above. It is also known (DE-A-34 26 889), a groove on a concrete component exposing a reinforcement area using a high pressure water jet and create the groove with a synthetic resin mortar to fill in.
Eine Aufgabe der Erfindung ist es daher, ein Verfahren der eingangs genannten Art zu schaffen, bei dem die durch die Zusatzbewehrung erreichbare Verfestigung bzw. Erhöhung der Tragfestigkeit des Betonbauteils vergrößert ist. Das erfindungsgemäße Verfahren weist diese Aufgabe lösend, die Merkmale des Patentanspruchs 1 auf. An object of the invention is therefore a method to create the type mentioned at which is achievable with the additional reinforcement Strengthening or increasing the load-bearing capacity of the Concrete component is enlarged. The invention The method solves this problem, the characteristics of claim 1.
Es ist die Zusatzbewehrung in das Innere des Betonbauteils hineingebracht und die mit der zusätzlichen Betonmasse verbundene Fläche des Betonbauteils vergrößert, wodurch die erreichte Verfestigung bzw. Erhöhung der Tragfestigkeit mit relativ einfachen Maßnahmen erheblich vergrößert ist. Durch die Erzeugung der Nut mittels des Hochdruckwasserstrahls wird eine Verletzung bzw. Beschädigung der Armierung vermieden, von der unvermeidlich ein Stück im Bereich der herzustellenden Nut liegt, so daß ein Armierungsbereich in der Nut freiliegt. Durch das Einbetten der Armierungsstahl-Zusatzbewehrung mittels der Betonmasse wird eine dem Betonbauteil materialmäßig angepaßte Bindemittelmasse vorgesehen, ist die Bewehrung rundum und über die Länge in der Betonmasse eingebettet, kann sich die Bewehrung in einem Stück entlang dem Betonbauteil erstrecken und hat die zusätzliche Betonmasse Verbindung mit dem Nutgrund und den beiden Nutwänden. Das kräftemäßige Zusammenwirken zwischen dem Betonbauteil und der Bewehrung ist über die zu verfestigende Länge des Betonbauteils hin gleichmäßig und vergrößert. Der eingelegte Armierungsstahl kann weitgehend beliebig lang gestaltet sein.It is the additional reinforcement in the interior of the concrete component brought in and the one with the additional Concrete mass connected area of the concrete component increases, whereby the solidification or Increase the load capacity with relatively simple Measures is significantly increased. Through the Creation of the groove by means of the high pressure water jet is an injury or damage to the Reinforcement avoided, from the inevitable one Piece lies in the area of the groove to be produced, so that a reinforcement area is exposed in the groove. By embedding the reinforcing steel additional reinforcement by means of the concrete mass a Concrete component material-adapted binder mass the reinforcement is provided all around and over the length embedded in the concrete mass can the reinforcement in one piece along the concrete component extend 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 too solidifying length of the concrete component evenly and enlarged. The inserted reinforcing steel can largely be of any length.
Das Bauwerk und das Betonbauteil bleiben während der Anbringung der Zusatzbewehrung funktionsfähig, d.h. in Gebrauch. Der Zusatzbewehrung-Armierungsstahl ist durch das Einbetten ohne weiteres auch gegen Brand und Korrosion geschützt. Das Auffüllen der Nut erfolgt mit an sich bekannten Techniken, indem von unten oder von der Seite her Betonmasse gespritzt wird. Die Nut wird nicht mechanisch, z.B. mittels eines Meißels erzeugt, der die Armierung verletzen könnte. Die Armierung des Betonbauteils ist z.B. auch eine Vorspannarmierung, welche Spannglieder und Seile umfaßt. Die Nut ist relativ schmal und nur zur Aufnahme einer einzigen Zusatzbewehrung oder von nur zwei Zusatzbewehrungen im Querschnitt geeignet. Die Nut erstreckt sich bis in eine Tiefe des Betonbauteils, in der die Armierung verläuft, ohne jedoch mehr als nur kleine Bereiche der Armierung freizulegen. Das Einbetten der Zusatzbewehrung kann praktisch fehlstellenfrei erfolgen. Verbundsteifigkeit und Biegetragfähigkeit des erfindungsgemäß ergänzten Betonbauteiles entsprechen denen eines monolithisch hergestellten Betonbauteiles. Es wird eine Zugzone des Betonbauteils mit der Zusatzbewehrung versehen und dadurch die Tragfähigkeit des Betonbauteils verbessert. Die Oberfläche des Armierungsstahls der Zusatzbewehrung ist in üblicher Weise gerippt.The structure and the concrete component remain during the attachment of the additional reinforcement is functional, i.e. in use. The additional reinforcement reinforcing steel is also easy by embedding protected against fire and corrosion. Filling up the groove is made using techniques known per se, by from concrete mass injected below or from the side becomes. The groove is not mechanical, e.g. by means of of a chisel that violate the armouring could. The reinforcement of the concrete component is e.g. also a prestressing armature, which tendons and includes ropes. The groove is relatively narrow and only to accommodate a single additional reinforcement or of only two additional reinforcements in cross section suitable. The groove extends to a depth the concrete component in which the reinforcement runs, but without more than just small areas of reinforcement to expose. Embedding the additional reinforcement can be done practically without defects. Bond rigidity and bending capacity of the invention supplemented concrete component correspond to those of a monolithically manufactured concrete component. It becomes a tensile zone of the concrete component with the additional reinforcement provided and thereby the load capacity of the concrete component improved. The surface of the Reinforcing steel of the additional reinforcement is common Way ripped.
In der Regel weist die Armierung des Betonbauteils zwei benachbarte Längsarmierungsglieder auf. In diesem Fall ist es besonders zweckmäßig und vorteilhaft, wenn die Nut so erzeugt wird, daß sie zwischen den zwei benachbarten Längsarmierungsgliedern verläuft und im wesentlichen über die Länge Abstand von diesen aufweist. Die Einbettung der Längsarmierungsglieder ist also im wesentlichen nicht beschädigt bzw. aufgebrochen. Längsarmierungsglieder werden aufgrund der Nuterzeugung bereichsweise freigelegt, wenn die Position des Längsarmierungsgliedes nicht ordnungsgemäß ist, d.h. wenn das Längsarmierungsglied nicht ausreichend parallel zur Nut verläuft.As a rule, the reinforcement of the concrete component shows two adjacent longitudinal reinforcement links. In In this case it is particularly useful and advantageous if the groove is created so that it between the two adjacent longitudinal reinforcement members runs and essentially over the Distance from these. The embedding the longitudinal reinforcement members is therefore essentially not damaged or broken. Longitudinal reinforcement links are due to the grooving exposed in certain areas if the position of the Longitudinal reinforcing member is not correct, i.e. if the longitudinal reinforcement link is not sufficient runs parallel to the groove.
In der Regel weist die Armierung des Betonbauteils querverlaufende Armierungsbügel auf. In diesem Fall ist es besonders zweckmäßig und vorteilhaft, wenn die Nut so erzeugt wird, daß sie und die Armierungsbügel einander queren. Es sind also freigelegte Armierungsbereiche von den Armierungsbügel gebildet.As a rule, the reinforcement of the concrete component shows transverse reinforcement bracket. In this case it is particularly useful and advantageous if the groove is created so that it and the reinforcement bracket cross each other. So they are exposed Reinforcement areas from the reinforcement bracket educated.
In diesem Fall ist es besonders zweckmäßig und vorteilhaft, wenn die Nut so erzeugt wird, daß der Nutgrund tiefer liegt als die freigelegten Bereiche der Armierungsbügel, und wenn die Armierungsstahl-Zusatzbewehrung zwischen den Nutgrund und die Armierungsbügel geschoben wird. Durch diese Gestaltung wird die Verfestigung bzw. Tragfähigkeit des Betonbauteils weiter gesteigert.In this case, it is particularly useful and advantageous if the groove is generated so that the It is only deeper than the exposed areas the reinforcement bracket, and if the reinforcement steel additional reinforcement between the groove bottom and the Reinforcement bar is pushed. Through this design the consolidation or load-bearing capacity of the Concrete component further increased.
Die Zusatzbewehrung darf sich beim Einbringen der einbettenden Betonmasse in die Nut nicht bewegen, da eine solche Bewegung die angestrebte Verfestigung unterbindet. Der zusätzliche Armierungsstahl wird daher mittels Bindedraht festgelegt, z.B. an den freigelegten Querbügel-Bereichen. Es ist auch möglich, in der Nut Schnellzementböcke zu bilden und in diesen Bindedrähte festzulegen.Dies ist eine einfache Maßnahme, um die Zusatzbewehrung mit Abstand vom Nutgrund und gegen Bewegung beim Einbringen der Betonmasse gesichert festzulegen, wenn in der Nut keine Armierungsbügel vorhanden sind.The additional reinforcement may change when the do not move the embedding concrete mass into the groove, since such a movement is the desired consolidation prevents. The additional reinforcing steel is therefore fixed using a binding wire, e.g. on the exposed crossbar areas. It is also possible to form quick cement blocks in the groove and fix it in these tie wires. This is one simple measure to use the additional reinforcement Distance from the bottom of the groove and against movement when inserting the concrete mass secured when there are no reinforcement brackets in the groove.
Besonders zweckmäßig und vorteilhaft ist es, wenn vor der Erzeugung der Nut die Lage von der geplanten Nut benachbarten Längsarmierungsgliedern festgestellt und am Betonbauteil vermerkt wird. Diese Lokalisierung und Markierung der Position der Längsarmierungsglieder erhöht die Sicherheit, daß bei der Erzeugung der Nut diese mit ausreichendem Abstand von den Längsarmierungsgliedern entsteht und deren Ummantelung bzw. Einbettung im wesentlichen unbeschädigt bleibt. Die Lokalisierung erfolgt z.B. mittels eines magnetischen Tastgerätes und/oder mittels eines Wasserstrahlschneiders, der einen querverlaufenden schmalen Schlitz erzeugt.It is particularly expedient and advantageous if before creating the groove the location of the planned one Found only adjacent longitudinal reinforcement members and is noted on the concrete component. This Localization and marking of the position of the Longitudinal reinforcement links increases the security that when creating the groove, this with sufficient Distance from the longitudinal reinforcement members arises and their sheathing or embedding essentially remains undamaged. The localization e.g. by means of a magnetic touch device and / or by means of a water jet cutter which creates a transverse narrow slot.
Der Querschnitt der Nut ist z.B. rechteckig. Besonders zweckmäßig und vorteilhaft ist es jedoch, wenn die Nut so erzeugt wird, daß sie einen Trapezquerschnitt mit der schmaleren Seite am Nutgrund aufweist. Dies erleichtert das Einbringen der einbettenden Betonmasse.The cross section of the groove is e.g. rectangular. Especially However, it is expedient and advantageous if the groove is created so that it has a trapezoidal cross section with the narrower side at the bottom of the groove having. This facilitates the introduction of the embedding concrete mass.
Besonders zweckmäßig und vorteilhaft ist es, wenn das erfindungsgemäße Verfahren bei einem Betonbauteil angewendet wird, das der Tragaufbau einer Brücke ist. Es wird also der Brückenüberbau und nicht der Pfosten der Brücke verfestigt. Bei einem solchen Tragaufbau einer Brücke ist die Armierung in der Regel von Längsarmierungsgliedern und querverlaufenden Armierungsbügeln gebildet.It is particularly expedient and advantageous if the method according to the invention in a concrete component is applied, the supporting structure of a Bridge is. So it will be the bridge superstructure and not the post of the bridge solidified. At a such a bridge structure is the reinforcement usually of longitudinal reinforcement and transverse Reinforcement brackets formed.
Für die Durchführung des erfindungsgemäßen Verfahrens ist ein das Betonbauteil bearbeitendes Gerät vorgesehen, das einen Hochdruckwassererzeuger und eine daran angeschlossene kreisende Spritzdüse aufweist, die den Hochdruckwasserstrahl abgibt. Es ist denkbar, diese Spritzdüse von Hand zu halten und entlang dem Betonbauteil zu bewegen. Wie Versuche zeigen, läßt sich auf diese Weise keine Nut erzeugen, die in der Längsausrichtung und im Querschnitt befriedigend genau gestaltet ist.For the Implementation of the method according to the invention a device processing the concrete component is provided, the one high pressure water generator and one orbiting spray nozzle connected to it, which emits the high pressure water jet. It is conceivable to hold this spray nozzle by hand and along to move the concrete component. Like attempts no groove can be created in this way, those in the longitudinal direction and in cross section is designed to be satisfactorily accurate.
Es wird daher ein Gerät zur Bearbeitung des Betonbauteils verwendet, das dazu geeignet ist, eine Nut in dem Betonbauteil mittels des Hochdruckwasserstrahls mit verbesserter Längsausrichtung und Querschnittkonstanz auf vereinfachte Weise zu erzeugen. Hierzu ist die Spritzdüse an einem Wagen angebracht ist, der mittels eines Antriebs entlang einer Führung verfahrbar ist, die mittels einer Halteeinrichtung an dem Betonbauteil gehalten ist, wobei der Antrieb bezüglich der Fahrgeschwindigkeit steuerbar ist.It therefore becomes a device for processing the concrete component used, which is suitable for 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 way. This is the spray nozzle on one Carriage is attached by means of a drive is movable along a guide, which means a holding device held on the concrete component is, the drive with respect to the driving speed is controllable.
Durch diese Gerätegestaltung wird eine linientreu und querschnittskonstant verlaufende Nut bzw. ein solcher breiter Schlitz erzeugt. Man kann eine genaue Nutengeometrie einhalten. Die Festlegung der Führung am Betonbauteil erfolgt z.B., indem ein Baggerarm die Führung gegen das Betonbauteil drückt, oder in der Regel, indem die Führung am Betonbauteil selbst befestigt ist. Die Vorrichtung ist unabhängig davon nützlich, inwieweit eine Verbesserung der Tragfestigkeit des Betonbauteils durch die Zusatzbewehrung erfolgt und wie die Armierung im Einzelnen verläuft. Die Führung ist in der Regel schienenartig und in der Regel auf nur einer Seite der zur erzeugenden Nut vorgesehen.Through this device design, a line is true and cross-sectionally running groove or a such a wide slit creates. One can adhere to the exact groove geometry. The establishment of the The concrete component is guided, for example, by a Excavator arm the guide against the concrete component presses, or usually by taking the lead on Concrete component itself is attached. The Device is useful regardless to what extent an improvement in the load-bearing capacity of the Concrete component is made by the additional reinforcement and how the reinforcement works in detail. The Leadership is usually rail-like and in the Usually on only one side of the groove to be created intended.
Der Spritzwasserstrahl bewegt sich z.B. geradlinig vorwärts. Dabei gibt die Spritzdüse den Hochdruckwasserstrahl kreisend ab. Dies ermöglicht die materialabtragende Wirkung des Hochdruckwasserstrahls über die Nutbreite und erleichtert die Erzeugung in sich gerader, ausbrechungsfreier Nutwände.The spray of water moves e.g. straightforward forward. The spray nozzle gives the high pressure water jet circling. This enables the material-removing effect of the high pressure water jet across the groove width and facilitates the Generation in a straight line, free of breakouts Groove walls.
z.B. sind neben der Führung zwei Abdeckungsstücke der Spritzdüse zugeordnet vorgesehen, die einen Abstand voneinander aufweisen, der gleich der Weite der Nutöffnung ist und kleiner als der Durchmesser des strahlüberstrichenen Kreises ist. Die Abdeckungen in Verbindung mit dem kreisenden Druckwasserstrahl vereinfachen und verbessern die Erzeugung einer ausbrechungsfreien Nut. Die vom Strahlende durchlaufene Wendelkreisbahn wird also an beiden Seitenstreifen gegenüber dem Betonbauteil abgedeckt, wodurch die erzeugte Nuttiefe über die Breite der Nut vergleichmäßigt wird.e.g. are two cover pieces of the guide Spray nozzle assigned to the one Have a distance from each other that is equal to the width the slot opening is and smaller than the diameter of the beam-swept circle. The covers in connection with the circling water jet simplify and improve production an escape-free groove. The one that shines continuous spiral circular path is on both Side stripes covered opposite the concrete component, whereby the generated groove depth over the Width of the groove is evened out.
Der Hochdruckwasserstrahl wird z.B. mit einem Druck von 1000 bar und einer Wassermenge von 240 Ltr./min abgegeben. Die Nuttiefe ist davon abhängig, wie lange der Strahl an einer Stelle arbeitet, d.h. wie groß die Fahrgeschwindigkeit des Wagens ist. Deshalb ist die Steuerbarkeit des Fahrantriebs wichtig. Der kreisende und auch schräg verlaufende Hochdruckwasserstrahl arbeitet auch hinter bzw. unter Armierungsbügeln der Armierung und wird in Kreisgeschwindigkeit, Druck und Wassermenge bei einem Nuterzeugungsvorgang konstant gehalten.The high pressure water jet is e.g. with a print of 1000 bar and a water volume of 240 liters / min submitted. The groove depth depends on how as long as the beam works in one place, i.e. how the driving speed of the car is great. That's why the controllability of the travel drive is important. The circling and also sloping High pressure water jet also works behind or under reinforcement bars of the reinforcement and is in Circular speed, pressure and amount of water a grooving process kept constant.
In der Zeichnung ist eine bevorzugte Ausführungsform der Erfindung dargestellt und zeigt
- Fig.1
- eine Unteransicht einer Zusatzbewehrung an einem armierten Betonbauteil eines zu sanierenden Bauwerkes,
- Fig.2
- einen Schnitt gemäß Linie II-II in Fig. 1,
- Fig.3
- einen Schnitt gemäß Linie III-III in Fig. 2,
- Fig.4
- eine Seitenansicht einer Vorrichtung zur Anbringung einer Zusatzbewehrung an einem armierten Betonbauteil eines zu sanierenden Bauwerkes und
- Fig.5
- eine Unteransicht der Vorrichtung gemäß Fig. 4.
- Fig. 1
- a bottom view of an additional reinforcement on a reinforced concrete component of a building to be renovated,
- Fig. 2
- 2 shows a section along line II-II in FIG. 1,
- Fig. 3
- 2 shows a section along line III-III in FIG. 2,
- Fig. 4
- a side view of a device for attaching an additional reinforcement to a reinforced concrete component of a building to be renovated and
- Fig. 5
- 4 shows a bottom view of the device according to FIG. 4.
Gemäß Zeichnung weist eine nicht näher gezeigte
Brücke ein Betonbauteil 1 auf, das an der Unterseite
zu verstärken ist und in dem an der Unterseite
eine Armierung 2 vorgesehen ist, die aus Längsarmierungsgliedern
3 und Armierungsbügeln 4 besteht,
die einander kreuzen und mit nicht gezeigten
Bindedrähten miteinander verbunden sind. Zwischen
zwei benachbarten, zueinander parallel verlaufenden
und einen Abstand voneinander aufweisenden Längsarmierungsgliedern
3 ist an der Unterseite des
Betonbauteils 1 eine Nut 5 erzeugt, deren Nutgrund
6 tiefer im Betonbauteil liegt als die Armierung 2
und deren Nutwände 7 jeweils einen deutlichen
Abstand von dem benachbarten Längsarmierungsglied 3
aufweisen.According to the drawing, one not shown
Bridge a concrete component 1 on the bottom
is to be reinforced and in the bottom
a reinforcement 2 is provided, which consists of longitudinal reinforcement members
3 and reinforcement brackets 4,
that cross each other and with not shown
Binding wires are connected together. Between
two neighboring, parallel to each other
and spaced longitudinal reinforcing members
3 is at the bottom of the
Concrete component 1 creates a
Die Armierungsbügel 4 queren die Nut 5 frei und
weisen in der Nut sogenannte freigelegte Bereiche 9
auf. In der Nut 5 ist eine einzige Armierungsstahl-Zusatzbewehrung
10 vorgesehen, welche hinter die
freigelegten Bereiche 9 der Armierungsbügel 4
geschoben ist und an diesem durch je einen Bindedraht
11 festgelegt ist. Die Nut 5 ist mit Betonmasse
12 gefüllt, die ausgehärtet ist, die Zusatzbewehrung
10 ringsum umschließt und mit dem Nutgrund
6 sowie den beiden Nutwänden 7 haltend verbunden
ist.The reinforcement bracket 4 cross the
Die zur Anbringung dieser Zusatzbewehrung verwendete
Vorrichtung umfaßt verschiedene nicht gezeigte
Aggregate und ein Gerät 13 zur Erzeugung der Nut.
Zu dem Gerät 13 gehört eine gerade schienenartige
Führung 14, die an die Unterseite des Betonbauteils
1 angelegt ist, und an diesem unmittelbar durch
Dübel 15 befestigt ist. Die Führung 14 weist an
beiden Längsseiten gezahnte Laufspuren auf, in
welche gezahnte Laufrollen 16 greifen, durch welche
das übrige Gerät 13 abgehängt ist. Die Laufrollen
16 sind Teil eines Wagens 17, der ein nicht gezeigtes
Getriebe aufnimmt, über das die Laufrollen
mittels eines Antriebs 18 antreibbar sind. Der
Antrieb 18 ist vom Wagen 17 getragen, wird über ein
Schleppkabel 19 mit Strom versorgt und ist zwecks
Steuerung der Antriebsgeschwindigkeit mit einer
Steuereinrichtung 20 versehen, die über ein
Schleppkabel 21 betätigbar ist.The one used to attach this additional reinforcement
Device includes various not shown
Units and a
An dem Wagen 17 ist ein Gestell 22 vorgesehen, das
seitlich wegragt und einen Drehantrieb 23 trägt, an
dem ein Düsenkopf 24 vorgesehen ist, der mit einer
exzentrisch angeordneten Spritzdüse 25 versehen
ist, die aufgrund der Rotation des Düsenkopfes 24
eine kreisende Bewegung macht. Der Düsenkopf 24 ist
mit seiner Mittelängsachse schräg geneigt zur zu
erzeugenden Nut 5 angeordnet, so daß ein die
Spritzdüse 25 verlassender, nicht gezeigter Hochdruckwasserstrahl
ebenfalls schräg geneigt ist. Der
Drehantrieb 23 wird über ein Schleppkabel 26 mit
Strom versorgt und dem Düsenkopf 24 wird über einen
Schleppschlauch 27 Hochdruckwasser zugeführt, das
von einem nicht gezeigten Hochdruckwassererzeuger
herkommt. Der Wagen 20 trägt auch einen Rahmen 28,
der zwei seitliche Abdeckungsstücke 29 bildet, die
einen Abstand voneinander haben, der gleich der
Breite der zu erzeugenden Nut 5 ist und sich unmittelbar
unter der zu erzeugenden Nut befindet. A frame 22 is provided on the
Der Rahmen 28 ist zwischen dem Betonbauteil 1 und
der Spritzdüse 24 angeordnet und die Abdeckungsstücke
29 bewegen sich mit der Spritzdüse mit.The
Claims (7)
- A method for additionally reinforcing a reinforced concrete structural component (1) of a structure to be renovated while the structure and the concrete structural component are in continuous use,in which a groove (5) having a groove base (6) and two groove walls (7) is created in the reinforced concrete structural component (1) by means of a high-pressure water jet in order to accommodate an additional reinforcing steel reinforcement (10), exposing a reinforcement region (9),in which the reinforcing steel is provided with a rough surface and the additional reinforcing steel reinforcement (10) is introduced into the groove (5) and fixed at a distance from the groove base (6) by means of binding wire (11), andin which concrete material (12) is sprayed from underneath or from the side into the groove (5), the concrete material embedding the additional reinforcing steel reinforcement (10) and being brought into contact with the groove base (6) and also the groove walls (7).
- A method according to claim 1, in which the reinforcement of the concrete structural component has two adjacent longitudinal reinforcing members, characterised in that the groove (5) is created such that it extends between the two adjacent longitudinal reinforcing members and is spaced therefrom substantially over its length.
- A method according to claim 1 or 2, in which the reinforcement of the concrete structural component has reinforcing stirrups which extend transversely, characterised in that the groove (5) is created such that it and the reinforcing stirrups (4) cross one another.
- A method according to claim 3, characterised in that the groove (5) is created such that the groove base (6) is deeper than the exposed regions of the reinforcing stirrups (4) and in that the additional reinforcing steel reinforcement (10) is inserted between the groove base and the reinforcing stirrups.
- A method according to one of the preceding claims, characterised in that before the groove (5) is created, the position of longitudinal reinforcing members adjacent the planned groove is determined and marked on the concrete structural component.
- A method according to one of the preceding claims, characterised in that the groove (5) is created such that it has a trapezoidal cross-section with the narrower side on the groove base.
- A method according to one of the preceding claims, characterised in that it is used with a concrete structural component (1) which is the supporting structure of a bridge.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4333782 | 1993-10-04 | ||
| DE4333782A DE4333782C2 (en) | 1993-10-04 | 1993-10-04 | Method and device for attaching additional reinforcement to a reinforced concrete component |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0646686A2 EP0646686A2 (en) | 1995-04-05 |
| EP0646686A3 EP0646686A3 (en) | 1995-07-19 |
| EP0646686B1 true EP0646686B1 (en) | 1998-01-21 |
Family
ID=6499361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94111515A Expired - Lifetime EP0646686B1 (en) | 1993-10-04 | 1994-07-23 | Method for adding additional reinforcement to a reinforced concrete building element |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0646686B1 (en) |
| AT (1) | ATE162582T1 (en) |
| DE (2) | DE4333782C2 (en) |
| DK (1) | DK0646686T3 (en) |
| ES (1) | ES2114099T3 (en) |
| GR (1) | GR3026106T3 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19730174C2 (en) | 1997-07-15 | 2001-12-06 | Bilfinger Berger Bau | Component |
| CN103225424A (en) * | 2013-05-02 | 2013-07-31 | 陈灿斌 | Cross and irregular channel type reinforced structure |
| CN108412220A (en) * | 2017-02-10 | 2018-08-17 | 新疆七星建设科技股份有限公司 | A kind of processing method in conjunction old and new concret face |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1434075A1 (en) * | 1961-05-26 | 1968-10-31 | Ney Gyl Labor Kg | Process for the subsequent or additional reinforcement of components made of concrete |
| DE2451639B2 (en) * | 1974-10-30 | 1979-08-23 | Hans 8501 Behringersdorf Binker | Procedure for restoring wooden beams |
| US4081200A (en) * | 1976-12-10 | 1978-03-28 | Flow Industries, Inc. | Method and apparatus to remove structural concrete |
| IT1172762B (en) * | 1983-09-16 | 1987-06-18 | Fip Ind | HYDRODEMOLITING MACHINE TRANSPORTABLE TO THE WORKPLACES, AS WELL AS MAXIMUM DEVICES AND RELATED METHOD TO PERFORM PLANNED DEMOLITIONS ON STRUCTURES IN CONCRETE CONCRETE BITUMINOUS OR SIMILAR, THROUGH HIGH ENERGY FLUID JETS |
| US5044139A (en) * | 1989-05-23 | 1991-09-03 | D. H. Blattner & Sons, Inc. | Method of replacing post tensioned beams |
| SE468172B (en) * | 1991-11-04 | 1992-11-16 | Aquajet Systems Ab | DEVICE FOR MATERIAL REMOVAL PROCESSING OF SIGNIFICANT VERTICAL MATERIAL LAYERS AND PROCEDURES FOR RENOVATING DAMAGED, SIGNIFICANT VERTICAL, BEARING CONSTRUCTIONS |
-
1993
- 1993-10-04 DE DE4333782A patent/DE4333782C2/en not_active Expired - Fee Related
-
1994
- 1994-07-23 DK DK94111515.6T patent/DK0646686T3/en active
- 1994-07-23 EP EP94111515A patent/EP0646686B1/en not_active Expired - Lifetime
- 1994-07-23 ES ES94111515T patent/ES2114099T3/en not_active Expired - Lifetime
- 1994-07-23 AT AT94111515T patent/ATE162582T1/en not_active IP Right Cessation
- 1994-07-23 DE DE59405077T patent/DE59405077D1/en not_active Expired - Lifetime
-
1998
- 1998-02-12 GR GR980400278T patent/GR3026106T3/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| ES2114099T3 (en) | 1998-05-16 |
| DE59405077D1 (en) | 1998-02-26 |
| ATE162582T1 (en) | 1998-02-15 |
| DE4333782C2 (en) | 1999-10-21 |
| GR3026106T3 (en) | 1998-05-29 |
| DE4333782C1 (en) | 1995-03-30 |
| EP0646686A3 (en) | 1995-07-19 |
| DK0646686T3 (en) | 1998-02-09 |
| EP0646686A2 (en) | 1995-04-05 |
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