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EP1379734B1 - Procede et machine pour travailler sur une surface de beton - Google Patents

Procede et machine pour travailler sur une surface de beton Download PDF

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Publication number
EP1379734B1
EP1379734B1 EP02723016A EP02723016A EP1379734B1 EP 1379734 B1 EP1379734 B1 EP 1379734B1 EP 02723016 A EP02723016 A EP 02723016A EP 02723016 A EP02723016 A EP 02723016A EP 1379734 B1 EP1379734 B1 EP 1379734B1
Authority
EP
European Patent Office
Prior art keywords
jets
angle
degrees
oscillation
concrete
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.)
Expired - Lifetime
Application number
EP02723016A
Other languages
German (de)
English (en)
Other versions
EP1379734A1 (fr
Inventor
Carl KESSON STRÖMDAHL
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.)
Conjet AB
Original Assignee
Conjet AB
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Filing date
Publication date
Application filed by Conjet AB filed Critical Conjet AB
Publication of EP1379734A1 publication Critical patent/EP1379734A1/fr
Application granted granted Critical
Publication of EP1379734B1 publication Critical patent/EP1379734B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
    • E01C23/12—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for taking-up, tearing-up, or full-depth breaking-up paving, e.g. sett extractor
    • E01C23/128—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for taking-up, tearing-up, or full-depth breaking-up paving, e.g. sett extractor with hydrojets

Definitions

  • This invention relates to a method of removing concrete from a concrete surface, for example to free the reinforcing bars in the road bed of a bridge, by ejecting a high pressure water jet from a nozzle that is kept close to the surface and reciprocated in parallel sweeps simultaneously with being oscillated transversely to the sweeping, and swinging the nozzle between the sweeps so that it is has an angle of attack in both sweeping movements.
  • the invention relates also to a machine for working a concrete surface down to the reinforcement of the concrete, comprising a vehicle on wheels having a transverse feed beam with a carriage that carries a water jet nozzle, where the nozzle is swingable about a first axis so as to give the jet an angle of attack in both directions when the carriage is reciprocated forth and back in working sweeps and swingable about a second axis so as to be oscillating in a plane transverse to feed beam.
  • Road salting influences concrete road beds and the surface layer of road beds of concrete bridges need to be replaced after some years before the salt has penetrated down to the steel reinforcement; otherwise will the maintenance costs be very high. Therefore, one wants to remove the upper concrete layer to free the uppermost reinforcement layer and cast a new concrete surface layer before the uppermost reinforcement layer has been affected by the salt.
  • Machines for such concrete removal are known for example by SE-451742-B , SE-508821-C , US-5361993-A , US-4854770 , and US-4753549-A and others.
  • This object is fulfilled in principle by the use of two nozzles that are jointly swept and oscillated while held in an angle to each other so that the ejecting jets impinge on the concrete at different angles as seen in the direction of oscillation.
  • the above defined carriage carries two jet ejecting nozzles that are jointly swingable about said axes and has an angle between their jet directions that is between 10 and 50 degrees as seen in the direction of the oscillation.
  • the machine shown in figures 1-2 consists of a vehicle carried by two front wheels 12,13 with built-in motors 14,15 and two rear wheels 16,17 by which it can be steered.
  • the machine has a pillar 18 that is rotatable about an axis I and forms a guide for a carrier 20.
  • the carrier 20 carries a mounting 21 for a feed beam or guide 22 that is transverse to an axis II about which the feed beam can be rotated. This arrangement provides for a great freedom in the positioning of the feed beam adjacent concrete surfaces in various positions and not only road beds.
  • the feed beam 22 carries and guides a carrier 23 with four wheels and the carrier has a built-in motor with pinjons meshing with a rack 25 on the feed beam.
  • the carrier 23 has a holder 30 with a bifurcated lower portion 40 for two water jet nozzles 31,32 shown in figures 4-6 .
  • the feed beam 22 has a protection hood 33 with a rubber shield 34 and the holder 30 extends down into the hood through a slot 35 formed by rubber sealings 36,37.
  • the holder 30 is swingable about an axis III by means of a hydraulic cylinder 27 so as to provide for a suitable angle of attack of the jets forwards in the carrier moving direction when the carrier moves in the one direction as well as in the opposite direction. Additionally, a motor 28 is arranged to oscillate the holder 30 about an axis IV transverse to the axis III in figure 5 and the central position of the holder 30 as well as its two end positions are indicated in figure 2 .
  • Figure 4 shows in a perspective view and figure 5 in a side view the lower portion 40 of the holder 30 with the two nozzles 31,32.
  • This portion 40 is screwed to the main portion of the holder 30 and it is bifurcated into two branches 41,42 that have the two nozzles 31,32 screwed into their ends.
  • the nozzles are obliquely directed towards each other so that the jets ejected from them cross at a distance of for example 10 cm from the nozzles.
  • the jets are indicated as lines 50,51 in figure 5 .
  • the branches 41,42 are somewhat twisted so that the jets cross but do not meet.
  • the difference in directions between the jets is shown as about 30 degrees in the plane of the paper in figure 5 , that is, the angle v is about 30 degrees and it should be between 10 and 50 degrees or between 10 and 40 degrees or preferably between 20 and 40 degrees.
  • the nozzle holder 30,40 is oscillated in the plane of the paper in figure 5 , that is, transverse to the feed beam 22, through an angle that should be between 6 and 20 degrees and preferably between 8 and 15 degrees.
  • the sum of half the angle v and half the oscillation angle should be at least 15 degrees and preferably at least 20 or 22 degrees.
  • the jets 50,51 will cut a comparatively wide path in the concrete because of the oscillation.
  • the entire machine is preferably stepped a step smaller than the width of the path so that the concrete is cut more than once.
  • the width of the path can for example be 15 cm and the steps can be less than half the width of the path, for example one third thereof the sweeps, sweeps.
  • the carrier 23 is moved in one direction along the feed beam with its nozzle holder 30 in an attack angle and the nozzle holder is oscillated transversely thereof at a high speed as compared with the speed of the carrier.
  • the carrier can for example move at a speed of 5-10 m/s and the oscillation frequency can for example be 40-400 double strokes per minute.
  • the entire machine is stepped forwards a step that is smaller than the path of cutting made by the oscillating jets and the nozzle holder 30 is swung back into an attack angle in the new sweeping movement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Road Repair (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Claims (10)

  1. Procédé pour enlever du béton d'une surface de béton, par exemple pour libérer les barres de renforcement de la base de la route d'un pont, en éjectant un jet d'eau à haute pression d'un gicleur (31,32) qui est maintenu près de la surface et inversé en passages parallèles étant en même temps oscillé transversalement par rapport au balayage,
    et en tournant le gicleur entre les passages de façon à ce qu'il ait un angle d'attaque dans les deux mouvements de balayage, caractérisé en ce que
    deux gicleurs (31, 32) sont utilisés, qui sont balayés et oscillés ensemble et maintenus à un angle l'un à l'autre de façon à ce que les jets (50, 51) attaquent la surface de béton à des angles différents comme vus dans la direction de l'oscillation, et la différence d'angle est maintenue fixe.
  2. Procédé selon la revendication 1, caractérisé en ce que, pendant l'oscillation, la différence des directions entre les jets (50,51) est entre 10 et 50 degrés comme vus dans le plan d'oscillation.
  3. Procédé selon la revendication 2, caractérisé en ce que la différence des directions entre les jets est entre 20 et 40 degrés comme vus dans le plan d'oscillation.
  4. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que les deux jets sont oscillés ensemble à travers un angle qui est entre 6 et 20 degrés.
  5. Procédé selon la revendication 4, caractérisé en ce que les deux jets sont oscillés ensemble à travers un angle qui est entre 6 et 15 degrés.
  6. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que les jets sont dirigés l'un vers l'autre.
  7. Procédé selon la revendication 6, caractérisé en ce que la somme de la moitié de la différence dans la direction entre les deux jets dans le plan d'oscillation et la moitié de l'angle d'oscillation est au moins 15, de préférence au moins 22 degrés.
  8. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un parcours de béton est travaillé à chaque passage par les jets des deux gicleurs oscillants (31,32) et les gicleurs sont échelonnés entre les passages à une distance inférieure à la largeur du parcours.
  9. Machine pour travailler une surface de béton jusqu'au renforcement du béton, comprenant un véhicule (11) ayant un axe d'alimentation transversal (22) avec un chariot (23) qui porte un gicleur de jet d'eau (31,32), où le gicleur est pivotant autour d'un premier axe (I) afin de donner au jet un angle d'attaque dans les deux directions quand le chariot est inversé en avant et en arrière dans des passages de travail et pivotant autour d'un deuxième axe (II) afin d'être oscillant dans un plan transversal à l'axe d'alimentation,
    caractérisé en ce que
    le chariot (23) porte deux gicleurs (31,32), qui sont habituellement pivotants autour desdits axes (I,II) et sont à un angle constant l'un de l'autre et ont une différence entre leurs directions de jet qui est entre 10 et 50 degrés vus dans le plan d'oscillation.
  10. Machine selon la revendication 9, caractérisée en ce que la différence entre les directions de jet des deux gicleurs (31,32) est entre 20 et 40 degrés vus dans le plan d'oscillation.
EP02723016A 2001-04-09 2002-04-09 Procede et machine pour travailler sur une surface de beton Expired - Lifetime EP1379734B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE0101306A SE521403C2 (sv) 2001-04-09 2001-04-09 Betongavverkningsmaskin och sätt att frilägga armering i en betongyta
SE0101306 2001-04-09
PCT/SE2002/000736 WO2002081823A1 (fr) 2001-04-09 2002-04-09 Procede et machine pour travailler sur une surface de beton

Publications (2)

Publication Number Publication Date
EP1379734A1 EP1379734A1 (fr) 2004-01-14
EP1379734B1 true EP1379734B1 (fr) 2008-11-05

Family

ID=20283770

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02723016A Expired - Lifetime EP1379734B1 (fr) 2001-04-09 2002-04-09 Procede et machine pour travailler sur une surface de beton

Country Status (6)

Country Link
EP (1) EP1379734B1 (fr)
JP (1) JP4057918B2 (fr)
AT (1) ATE413491T1 (fr)
DE (1) DE60229731D1 (fr)
SE (1) SE521403C2 (fr)
WO (1) WO2002081823A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE0400753L (sv) * 2004-03-24 2005-05-24 Conjet Ab Betongavverkningsmaskin
US8033641B2 (en) * 2005-01-05 2011-10-11 Aquajet Systems Holding Ab Method and a device for moving a jet member
SE0801398L (sv) * 2008-06-16 2009-08-04 Conjet Ab Maskin för bearbetning av en yta
SE536632C2 (sv) * 2013-02-05 2014-04-15 Conjet Ab Aggregat för avverkning av en yta med en högtrycksvattenstråle
SE541458C2 (sv) * 2016-02-29 2019-10-08 Conjet Ab Vattensprutaggregat och sätt att avverka en yta
JP6493850B2 (ja) * 2016-07-04 2019-04-03 樋口 幸弘 ウオータージェットノズル装置による路面破砕方法とウオータージェットノズル装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4854770A (en) * 1984-04-16 1989-08-08 Indescor Hydrodynamics Inc. Method and apparatus for removal of surface material
US4753549A (en) * 1986-08-29 1988-06-28 Nlb Corporation Method and apparatus for removing structural concrete
SE508821C2 (sv) * 1996-10-08 1998-11-09 Aquajet Systems Holding Ab Anordning och förfarande för förflyttning av ett objekt samt användning vid materialavlägsnande bearbetning av ett materialskikt, särskilt ett betongskikt

Also Published As

Publication number Publication date
EP1379734A1 (fr) 2004-01-14
SE0101306D0 (sv) 2001-04-09
ATE413491T1 (de) 2008-11-15
JP2004524462A (ja) 2004-08-12
DE60229731D1 (de) 2008-12-18
WO2002081823A1 (fr) 2002-10-17
SE521403C2 (sv) 2003-10-28
SE0101306L (sv) 2002-10-10
JP4057918B2 (ja) 2008-03-05

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