EP0407435B1 - Process and device for making manholes in roads - Google Patents

Process and device for making manholes in roads Download PDF

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Publication number
EP0407435B1
EP0407435B1 EP89904062A EP89904062A EP0407435B1 EP 0407435 B1 EP0407435 B1 EP 0407435B1 EP 89904062 A EP89904062 A EP 89904062A EP 89904062 A EP89904062 A EP 89904062A EP 0407435 B1 EP0407435 B1 EP 0407435B1
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EP
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Prior art keywords
hammer
trailer
circular saw
cut
hydraulic
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EP89904062A
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German (de)
French (fr)
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EP0407435A1 (en
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Alexander MÜHLSTÄDTER
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C23/00Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/06Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C23/00Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/06Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
    • E01C23/09Devices 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 forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges
    • E01C23/0906Devices 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 forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges for forming, opening-out, cleaning, drying or heating cuts, grooves, recesses or, excluding forming, cracks, e.g. cleaning by sand-blasting or air-jet ; for trimming paving edges
    • E01C23/0926Devices 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 forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges for forming, opening-out, cleaning, drying or heating cuts, grooves, recesses or, excluding forming, cracks, e.g. cleaning by sand-blasting or air-jet ; for trimming paving edges with power-driven tools, e.g. vibrated, percussive cutters
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C23/00Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/06Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
    • E01C23/12Devices 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
    • E01C23/122Devices 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 power-driven tools, e.g. oscillated hammer apparatus

Definitions

  • the invention relates to a method for producing head holes and trenches in paved traffic areas - generally traffic routes for non-rail vehicles such as roads and parking lots - which have a substructure and a superstructure, the superstructure being formed from a base layer and a final cover layer of bitumen or concrete , and an apparatus for performing this method.
  • the top layer is separated by means of the hammers, resulting in a jagged, broken-out edge of the top hole or trench
  • practice shows that despite the compaction of the subsoil, the entire mass, both the substructure and the superstructure, is lowered, so that Area of the former top hole or trench after about six months to a year, depending on the traffic load, forms a clear trough that can only be removed by filling up again. Even after this filling up, there is a further migration of the subsoil, so that after some time the same trough appears again.
  • the object of the invention is to provide a method which overcomes this disadvantage, that is to say prevents the newly laid base layers or the top layer from being lowered.
  • This is achieved in a manner according to the invention in that the cover layer is cut open up to the base layer by means of a circular saw and then at a distance of up to 30 cm from this saw cut to the inside of the head hole or the trench, the upper base layer by means of a hydraulic hammer with spade and optionally , again with a suitable step, the substructure can also be severed by means of the hydraulic hammer with spade and / or by means of an excavator, preferably by means of a suction excavator.
  • Headholes or trenches are no longer produced as before, the side surfaces of which are planar surfaces extending from the top layer to the bottom, but instead there is between the top layer and the subsequent base layer and, if appropriate again at least one step - a step - between the base course and the substructure.
  • This stepping allows a hard cover layer to be placed on the support layer like a lid after the base layer has been applied to the compacted substrate, this hard cover layer in turn, like the original construction, also distributing the load, so that the load acting on it also forwards the original cover layer.
  • top layer is cut open by means of a circular saw cut, the tension being removed from the top layer right at the start of the work, so that the top layer no longer breaks out in an uncontrolled manner due to further processing using a hydraulic hammer, so that the clean saw cut always forms the border of the head hole or trench. This in turn not only results in a clean appearance of the reclosed head hole or the trench, but also allows the subsequent cover surface to be cast properly or the insertion of a groove band etc.
  • a further, extraordinary advantage is that after cutting the cover layer at a distance from this separating cut on the base layer, work is continued with a hydraulic hammer, the procedure being that the separating cut of the hammer spade is brought down at a distance of a spade width.
  • Working with the hammer spade already has a rough, jagged parting surface, which is provided with additional projections by breaking out the soil between the individual working surfaces of the hammer.
  • an excavator preferably a suction excavator, again leaving a step of 5 cm to 30 cm, which also results in head hole or trench walls that are connected with the soil or soil to be inserted later interlock the base layer material. Subsequent lowering of these layers is largely ruled out.
  • This device according to the invention is characterized by a preferably uniaxial, road-approved trailer with a drawbar with a motor vehicle trailer coupling to which a steerable drive wheel connected to a motor is attached, and on the side of which a circular saw with hydraulic motor and a hydraulic hammer are vertically adjustable and on which a hydraulic unit with drive motor is attached.
  • Movable circular saws with a drive motor that are not approved for road traffic are already known. These devices are used as described above, so they cut open the top layer and possibly also part of the base layer. Then, as described above, the breaking point is expanded by using pneumatic or hydraulic hammers, the spade-shaped chisels of these hammers engaging in this saw cut.
  • a circular saw with a drive motor is attached to the follower according to the invention, as is a hydraulic hammer, which is however arranged at a variable distance from the circular saw, so that its spade-shaped chisel is at exactly this distance from that caused by the circular saw blade Cut acts on the top layer of the traffic area.
  • the above-mentioned hoist can also be attached to the trailer at the same time, expediently in such a way that a boom is attached to the lifting cylinder of the hammer with a pliers-like gripping device which can grasp and lift out the separated top layer or base layer parts.
  • the saw cut can also be made first and the area delimited by the saw cut can be excavated to the base layer and then the base layer and, if necessary, also the subsoil can be separated in a further operation and then be excavated.
  • the structure of a traffic area is shown schematically in FIG. 1. (7) the top layer and (8) the base layer of this traffic area, which lie on the ground (9). According to the method, the top layer is cut vertically or at an angle of 20 ° to the surface of this top layer (7) circular saw cut (10) and lifted off. Subsequently, at a distance of up to 30 cm, the base layer (8) is broken up along the dashed line (11) by means of a hydraulic spade and the base layer material which has broken out is also removed. If the top hole or trench is to be deeper, the subsoil is excavated by means of an excavator, preferably a suction excavator, as indicated by the broken line (12).
  • an excavator preferably a suction excavator
  • This method has the advantage that the top layer is cut cleanly by the circular saw cuts (10), so that it can also be cut result in correspondingly clean borders, which not only look advantageous, but are also to be connected again properly to the remaining cover layer (7) after the top hole or trench has been filled.
  • the base layer (8) or in the base (9) there are very strongly profiled walls which enable the base or base layer material to be filled in later to be interlocked with the remaining base or base layers. This avoids the setting of this material, which requires prior good compaction, and achieves a flat and level top layer.
  • a hydraulic unit (4) with an internal combustion engine is installed on the trailer.
  • the longitudinal guides (5) are used to attach a hydraulic hammer which is fed up and down by the lifting cylinder (13).
  • a holder (14) for a circular saw motor with a circular saw blade is also provided on these longitudinal guides, so that this circular saw motor with its circular saw blade can also be moved up and down through the lifting cylinder (13).
  • a drive wheel (6) which can be steered via a handlebar (15) and is driven by a hydraulic motor, is attached to the drawbar (2) so that it can be swiveled via a swivel joint (19).
  • a controller (18) for both the hydraulic motor of the drive wheel (16) as well as for the hammer and the circular saw motor is located on the front of the trailer (1) at the handlebar (15).
  • the receptacle (16) has a very simple device for adjusting the height of the support wheel (17), namely a manually operated jack.
  • a hydraulic piston can be attached.
  • the trailer (1) can be attached with its trailer coupling (3) to the corresponding coupling of a motor vehicle, so that it can be brought to the place of use quickly and easily.
  • the follower (1) is moved by means of this drive wheel (6) so that the circular saw blade, after being lowered by the hydraulic cylinder (13), covers the top layer (7) up to a maximum of the base layer (8).
  • the hydraulic hammer with its spade is used, which separates the base layer (8) and / or, depending on the height of this base layer (8), also the sub-surface so that one approximately at a distance of 5 cm to 30 cm to the circular saw cut The level lying on the top layer remains.
  • the result is a head hole or a Trench, in which the cover layer (7) is cut cleanly and exactly following a predetermined dividing line, which is then followed by an inward-facing step as far as the actual top hole wall or trench wall.
  • the top hole or the trench can be refilled, compacted and a base layer (8) and ultimately also a cover layer (7) lying on the step can be applied.

Abstract

When manholes and trenches are excavated in traffic areas by traditional methods, the back-fill material oftens sinks and the edges re-emerge only a short time after the manholes or trenches have been closed. To avoid such damage, it is suggested to make the lateral edges of the manholes (10, 11, 12) or trenches stepped. A device for achieving this has a trailer (1) which can be steered and driven and is allowed to use the road network, and onto which is mounted a hydraulic unit which can drive a circular saw blade that can be mounted on the trailer (1), as well as a hydraulic hammer. This device makes the process easy to implement, resulting in manholes (10, 11, 12) and trenches which, besides not sinking, also have precise measurements and clean joints.

Description

Die Erfindung betrifft ein Verfahren zum Herstellen von Kopflöchern und Gräben in befestigten Verkehrsflächen - allgemein Verkehrswege für nicht schienengebundene Fahrzeuge wie Straßen und Parkplätze - die einen Unterbau und einen Oberbau aufweisen, wobei der Oberbau aus einer Tragschicht und einer abschließenden Deckschicht aus Bitumen oder Beton gebildet ist, sowie einer Vorrichtung zur Durchführung dieses Verfahrens.The invention relates to a method for producing head holes and trenches in paved traffic areas - generally traffic routes for non-rail vehicles such as roads and parking lots - which have a substructure and a superstructure, the superstructure being formed from a base layer and a final cover layer of bitumen or concrete , and an apparatus for performing this method.

In Städten und Gemeinden verlaufen im allgemeinen unterhalb der Straßendecke oder an deren Randstreifen Ver- und Entsorgungsleitungen für Wasser und Abwasser, für Strom und Gas wie auch für Schwachstromeinrichtungen. Selbst neuverlegte Straßen und Gehwege etc. müssen daher, tritt ein Schaden an diesen Versorgungs- beziehungsweise Entsorgungsleitungen ein, wieder geöffnet werden, um den Schaden an diesen tieferliegenden Leitungen beheben zu können. In der Regel genügt hierfür das Herstellen eines Kopfloches, also eines etwa quadratischen Loches, dessen Kantenlänge im allgemeinen einen Meter nicht übersteigt; bei Wasser- und Abwasserleitungen werden allerdings meistens größere Kopflöcher notwendig. Es kann sich auch ergeben, daß ein längeres Stück, also ein Graben zum Beheben eines Schadens oder auch zur Neuinstallation, ausgehoben werden muß.In cities and municipalities, supply and disposal lines for water and waste water, for electricity and gas, as well as for low-voltage facilities, generally run underneath the road surface or on its edge strips. Even newly laid roads and sidewalks etc. must therefore be reopened if damage occurs to these supply or disposal lines in order to be able to repair the damage to these lower lines. As a rule, it is sufficient to make a top hole, that is to say an approximately square hole, the edge length of which generally does not exceed one meter; Larger head holes are usually necessary for water and sewage pipes. It may also be the case that a longer piece, ie a trench, must be dug to repair damage or to reinstall it.

In all diesen Fällen wird bisher so vorgegangen, daß mit einem Preßlufthammer oder einem hydraulischen Hammer mit Spaten eine entsprechend große Fläche der Verkehrsflächen-Befestigung herausgebrochen und dann der Untergrund auf herkömmliche Weise mit Pickel und Schaufel oder mittels eines Baggers ausgehoben wird. Nach Beheben des Schadens wird wieder bis zur Deckschicht aufgefüllt, verdichtet und sodann wieder ein Material eingefügt, das weitgehend dem vorherigen Oberbau-Material entsprechen sollte. Das Ergebnis dieser Arbeit ist jedoch äußerst unbefriedigend. Zum einen ergibt sich durch das Abtrennen der Deckschicht mittels der Hämmer ein ausgezackter, ausgebrochener Rand des Kopfloches beziehungsweise des Grabens, zum anderen zeigt die Praxis, daß sich trotz der Verdichtung des Untergrundes die gesamte Masse, sowohl Unterbau wie Oberbau, senkt, so daß die Fläche des ehemaligen Kopfloches beziehungsweise Grabens etwa nach einem halben Jahr bis einem Jahr, je nach der Verkehrsbelastung, eine deutliche Mulde bildet, die nur wieder durch Auffüllen beseitigt werden kann. Selbst aber nach diesem Auffüllen findet eine weitere Wanderung des Untergrundes statt, so daß nach einiger Zeit wieder die gleiche Mulde in Erscheinung tritt. Zurückzuführen ist dies darauf, daß derartige Verkehrsflächen so aufgebaut sind, daß die vergleichsweise harte Deckschicht hinreichend lastverteilend wirkt, die darunter angeordneten Schichten, Stützschichten oder Tragschichten, hingegen Untergrundverformungen ausgleichen sollen. Diese Aufgaben der Deckschicht beziehungsweise Tragschichten können bei dem nachträglichen Auffüllen nicht mehr hergestellt werden, da der Untergrund, selbst nach Verdichtung, entweder nach unten oder seitlich ausweicht, die darauf angebrachten Tragschichten jedoch keinen guten Kontakt zu den vorherigen Tragschichten haben und daher einschließlich der oberen Deckschicht an den ursprünglichen Schichten herab nach unten weggleiten.In all of these cases, it has been done so far that a correspondingly large area of the traffic surface attachment is broken out with a jackhammer or a hydraulic hammer with spade and then the subsurface is excavated in the conventional manner with a pick and shovel or by means of an excavator. After the damage has been remedied, the top layer is filled up again, compacted and then a material is inserted which should largely correspond to the previous superstructure material. However, the result of this work is extremely unsatisfactory. On the one hand, the top layer is separated by means of the hammers, resulting in a jagged, broken-out edge of the top hole or trench, on the other hand, practice shows that despite the compaction of the subsoil, the entire mass, both the substructure and the superstructure, is lowered, so that Area of the former top hole or trench after about six months to a year, depending on the traffic load, forms a clear trough that can only be removed by filling up again. Even after this filling up, there is a further migration of the subsoil, so that after some time the same trough appears again. This is due to the fact that traffic areas of this type are constructed in such a way that the comparatively hard covering layer has a sufficient load-distributing effect, while the layers, supporting layers or base layers arranged underneath are intended to compensate for ground deformation. These tasks of the top layer or base layers can no longer be produced during the subsequent filling, since the substrate, even after compaction, either deviates downwards or sideways, but the base layers applied thereon do not have good contact with the previous base layers and therefore including the top cover layer sliding down the original layers.

Um zumindest das unschöne Aussehen der Kanten eines derartigen Durchbruchs zu vermeiden, werden auch Kreissägen verwendet, die die Deckschicht und teilweise auch die Tragschicht aufschneiden und erst nachträglich dann, entlang dieser Säge-Schnittlinie, mit dem Hammer weitergearbeitet wird. Das Senken des neu aufgefüllten Materials kann hierdurch jedoch nicht vermieden werden, da nach wie vor eine stabile Verbindung zwischen dem aufgefüllten Material und den ursprünglichen Schichtmaterialien nicht stattfindet.In order to at least avoid the unsightly appearance of the edges of such a breakthrough, circular saws are also used which cut open the top layer and partly also the base layer and only then continue to work with the hammer along this cutting line. However, the lowering of the newly filled material cannot be avoided in this way, since a stable connection between the filled material and the original layer materials still does not take place.

In neuerer Zeit wird auch vorgeschlagen, ein Kopfloch beziehungsweise einen Graben der benötigten Breite mittels Hammer und/oder Bagger auszuheben und sodann nach Verfüllen und Verdichten des Untergrundes die Deckschicht und Tragschicht im Abstand von der vorherigen Grabenwand mittels eines Kreissägeschnittes aufzutrennen und das abgetrennte Material zu entfernen. Dadurch bildet sich zwischen dem verfestigten Unterbau und den verbleibenden Tragschichten eine Stufe, die nunmehr mit Tragschicht- und schließlich auch mit Deckschichtmaterial verfüllt werden kann. Zwar wird durch diese Maßnahme das Setzen des Untergrundes bereits vermindert und es ergeben sich auch scharfkantige Trennschnitte, jedoch ist eine Verklammerung des neu eingefüllten Tragschichtmaterials mit dem verbliebenen Tragschichtmaterial durch den glatten Sägeschnitt nicht möglich, wodurch wiederum ein Senken des Materials begünstigt wird. Außerdem entstehen hierdurch, durch den tiefen Einsatz des Kreissägeblattes, sehr hohe Werkzeugkosten.In recent times it has also been proposed to dig a head hole or a trench of the required width using a hammer and / or excavator and then, after filling and compacting the subsoil, the top layer and base layer at a distance from the previous one Cut the ditch wall using a circular saw cut and remove the separated material. As a result, a step forms between the solidified substructure and the remaining base layers, which can now be filled with base layer and finally also with top layer material. Although this measure already reduces the setting of the subsoil and there are also sharp-edged separating cuts, clinging of the newly filled base layer material to the remaining base layer material is not possible due to the smooth saw cut, which in turn favors a lowering of the material. In addition, this results in very high tool costs due to the deep use of the circular saw blade.

Aufgabe der Erfindung ist es, ein Verfahren anzugeben, das diesen Nachteil behebt, also das Senken der neu verlegten Tragschichten beziehungsweise der Deckschicht verhindert. Erreicht wird dies in erfindungsgemäßer Weise dadurch, daß die Deckschicht bis zur Tragschicht mittels einer Kreissäge aufgeschnitten wird und daß sodann in einem Abstand bis 30 cm von diesem Sägeschnitt zur Innenseite des Kopfloches beziehungsweise des Grabens hin die obere Tragschicht mittels eines hydraulischen Hammers mit Spaten und gegebenenfalls, nochmals mit einer entsprechenden Abtreppung, auch der Unterbau mittels des hydraulischen Hammers mit Spaten und/oder mittels eines Baggers, vorzugsweise mittels eines Saugbaggers, durchtrennt werden.The object of the invention is to provide a method which overcomes this disadvantage, that is to say prevents the newly laid base layers or the top layer from being lowered. This is achieved in a manner according to the invention in that the cover layer is cut open up to the base layer by means of a circular saw and then at a distance of up to 30 cm from this saw cut to the inside of the head hole or the trench, the upper base layer by means of a hydraulic hammer with spade and optionally , again with a suitable step, the substructure can also be severed by means of the hydraulic hammer with spade and / or by means of an excavator, preferably by means of a suction excavator.

Nicht mehr also wie bisher werden Kopflöcher beziehungsweise Gräben hergestellt, deren Seitenflächen plane, von der Deckschicht bis zum Boden reichende Flächen sind, sondern es wird zwischen der Deckschicht und der nachfolgenden Tragschicht und gegebenenfalls nochmals zwischen Tragschicht und Unterbau mindestens eine Stufe - eine Abtreppung - vorgesehen. Diese Abtreppung läßt es zu, daß nach Aufbringen der Tragschicht auf den verdichteten Untergrund eine harte Deckschicht auf die Tragschicht wie ein Deckel aufgelegt werden kann, wobei diese harte Deckschicht wiederum, wie auch die ursprüngliche Konstruktion lastverteilend wirkt, die auf sie einwirkende Last also auch an die ursprüngliche Deckschicht weiterleitet. Dadurch wird, wie bei derartigen Verkehrsflächen vorgesehen, die plastischere Tragschicht geringer beansprucht, so daß, hinreichende Verdichtung des Untergrundes vorausgesetzt, ein Senken der Tragschicht und damit selbstverständlich auch der oberen Deckschicht nicht mehr stattfindet. Tatsächlich hat die Praxis gezeigt, daß bei einem sorgsamen Aufbau der verschiedenen Schichten und bei genügender Verdichtung des Untergrundes ein Senken des in ein derartiges Kopfloch oder einen derartigen Graben eingefügten Materials nicht mehr zu beobachten ist.Headholes or trenches are no longer produced as before, the side surfaces of which are planar surfaces extending from the top layer to the bottom, but instead there is between the top layer and the subsequent base layer and, if appropriate again at least one step - a step - between the base course and the substructure. This stepping allows a hard cover layer to be placed on the support layer like a lid after the base layer has been applied to the compacted substrate, this hard cover layer in turn, like the original construction, also distributing the load, so that the load acting on it also forwards the original cover layer. As a result, as is provided in traffic areas of this type, the more plastic base layer is less stressed, so that, provided that the subsurface is sufficiently compacted, the base layer and thus, of course, the upper cover layer are no longer lowered. In fact, practice has shown that with a careful construction of the various layers and with sufficient compaction of the subsoil, a lowering of the material inserted into such a head hole or such a trench can no longer be observed.

Zu beachten ist, daß lediglich die Deckschicht durch einen Kreissägeschnitt aufgeschnitten wird, wobei gleich zu Beginn der Arbeiten die Spannung von der Deckschicht genommen wird, so daß durch die weitere Bearbeitung mittels eines hydraulischen Hammers die Deckschicht nicht mehr unkontrolliert ausbricht, so daß der saubere Sägeschnitt stets die Umrandung des Kopflochs beziehungsweise des Grabens bildet. Dies wiederum ergibt nicht nur ein sauberes Aussehen des wiederverschlossenen Kopflochs beziehungsweise des Grabens, sondern läßt auch ein einwandfreies Vergiessen der späteren Deckfläche beziehungsweise das Einsetzen eines Nutbandes etc. zu.It should be noted that only the top layer is cut open by means of a circular saw cut, the tension being removed from the top layer right at the start of the work, so that the top layer no longer breaks out in an uncontrolled manner due to further processing using a hydraulic hammer, so that the clean saw cut always forms the border of the head hole or trench. This in turn not only results in a clean appearance of the reclosed head hole or the trench, but also allows the subsequent cover surface to be cast properly or the insertion of a groove band etc.

Ein weiterer, außerordentlicher Vorteil ist dadurch gegeben, daß nach dem Durchtrennen der Deckschicht mit Abstand von diesem Trennschnitt an der Tragschicht mit einem hydraulischen Hammer weitergearbeitet wird, wobei so vorgegangen werden soll, daß der Trennschnitt des Hammerspatens jeweils im Abstand einer Spatenbreite niedergebracht wird. Das Arbeiten mit dem Hammerspaten bringt an sich schon eine rauhe, gezackte Trennfläche, die noch dadurch mit zusätzlichen Vorsprüngen versehen wird, daß das Erdreich zwischen den einzelnen Arbeitsflächen des Hammers herausgebrochen wird. Insbesondere bei tieferen Kopflöchern beziehungsweise Gräben empfiehlt es sich sodann, mittels eines Baggers, vorzugsweise eines Saugbaggers, wiederum unter Belassen einer Stufe von 5 cm bis 30 cm, weiterzuarbeiten, wodurch sich auch Kopfloch- beziehungsweise Grabenwände ergeben, die sich mit dem später einzufügenden Erdreich beziehungsweise dem Tragschichtmaterial verzahnen. Ein nachträgliches Senken dieser Schichten wird damit weitgehend ausgeschlossen.A further, extraordinary advantage is that after cutting the cover layer at a distance from this separating cut on the base layer, work is continued with a hydraulic hammer, the procedure being that the separating cut of the hammer spade is brought down at a distance of a spade width. Working with the hammer spade already has a rough, jagged parting surface, which is provided with additional projections by breaking out the soil between the individual working surfaces of the hammer. In particular with deeper head holes or trenches, it is then advisable to continue working by means of an excavator, preferably a suction excavator, again leaving a step of 5 cm to 30 cm, which also results in head hole or trench walls that are connected with the soil or soil to be inserted later interlock the base layer material. Subsequent lowering of these layers is largely ruled out.

Das Herstellen der Abtreppung nach dem erfindungsgemäßen Verfahren setzt sorgsames Arbeiten voraus, was bei Straßenbauarbeiten nicht immer vorausgesetzt werden kann. Nach der Erfindung wird daher auch noch eine Vorrichtung zur Durchführung des Verfahrens angegeben, die nicht nur sicher zu der nach dem Verfahren notwendigen Stufe zwischen Deckschicht und Tragschicht führt, sondern die auch die Durchführung dieser Arbeiten wesentlich erleichtert und beschleunigt. Diese Vorrichtung nach der Erfindung ist gekennzeichnet durch einen vorzugsweise einachsigen, zum Straßenverkehr zugelassenen Nachläufer mit einer Deichsel mit Kfz-Anhängerkupplung, an der ein mit einem Motor verbundenes lenkbares Antriebsrad angebracht ist, und an dem seitlich eine Kreissäge mit Hydraulikmotor sowie ein hydraulischer Hammer höhenverstellbar angeordnet sind und auf dem ein Hydraulikaggregat mit Antriebsmotor aufgesetzt ist.The production of the steps using the method according to the invention requires careful work, which cannot always be assumed for road construction work. According to the invention, a device for carrying out the method is therefore also specified which not only reliably leads to the step between the top layer and the base layer required by the method, but which also considerably simplifies and accelerates the carrying out of this work. This device according to the invention is characterized by a preferably uniaxial, road-approved trailer with a drawbar with a motor vehicle trailer coupling to which a steerable drive wheel connected to a motor is attached, and on the side of which a circular saw with hydraulic motor and a hydraulic hammer are vertically adjustable and on which a hydraulic unit with drive motor is attached.

Verfahrbare, allerdings nicht zum Straßenverkehr zugelassene Kreissägemaschinen mit Antriebsmotor sind bereits bekannt. Diese Vorrichtungen werden wie oben beschrieben eingesetzt, schneiden also die Deckschicht und eventuell auch einen Teil der Tragschicht auf. Anschließend wird, wie oben beschrieben, die Aufbruchstelle durch Einsatz von pneumatischen oder hydraulischen Hämmern erweitert, wobei die spatenförmigen Meißel dieser Hämmer in diesen Sägeschnitt eingreifen. Im Gegensatz hierzu ist an dem Nachläufer nach der Erfindung sowohl eine derartige Kreissäge mit Antriebsmotor angebracht, wie auch ein hydraulischer Hammer, der jedoch in veränderbarem Abstand von der Kreissäge angeordnet ist, so daß sein spatenförmiger Meißel in eben diesem Abstand von dem durch das Kreissägeblatt hervorgerufenen Schnitt auf die Deckschicht der Verkehrsfläche einwirkt. Dadurch ergibt sich ein einerseits von dem Sägeschnitt, andererseits von dem Eingriff des hydraulischen Hammers begrenzter Deckschichtmaterial-Abschnitt, der unschwer durch entsprechend geformte Hebezeuge herausgehoben werden kann. Das weitere Bearbeiten wird dann in bekannter Weise durch den hydraulischen Hammer beziehungsweise einen Bagger vorgenommen, der die Tragschichten bis zum Untergrund zertrennt, wobei diese zertrennten Tragschichtmaterialien ebenfalls durch ein entsprechendes Hebezeug ausgehoben werden können. Der weitere Aushub des Kopfloches beziehungsweise des Grabens kann dann in zweckmäßiger Weise durch einen Saugbagger erfolgen, der nicht nur den Vorteil hat, daß im Untergrund verlegte Leitungen nicht beschädigt werden, sondern der auch ein sehr schnelles Arbeiten ermöglicht.Movable circular saws with a drive motor that are not approved for road traffic are already known. These devices are used as described above, so they cut open the top layer and possibly also part of the base layer. Then, as described above, the breaking point is expanded by using pneumatic or hydraulic hammers, the spade-shaped chisels of these hammers engaging in this saw cut. In contrast to this, such a circular saw with a drive motor is attached to the follower according to the invention, as is a hydraulic hammer, which is however arranged at a variable distance from the circular saw, so that its spade-shaped chisel is at exactly this distance from that caused by the circular saw blade Cut acts on the top layer of the traffic area. This results in a cover layer material section that is limited on the one hand by the saw cut and on the other hand by the engagement of the hydraulic hammer, which section can easily be lifted out by appropriately shaped lifting devices. The further processing is then carried out in a known manner by means of the hydraulic hammer or an excavator which cuts the base layers down to the subsoil, these separated base layer materials also being able to be lifted out by means of a suitable lifting device. The further excavation of the head hole or the trench can then be carried out expediently by means of a suction dredger, which not only has the advantage that lines laid underground are not damaged, but also enables very fast work.

Das oben angeführte Hebezeug kann auch gleichzeitig an dem Nachläufer angebracht sein, zweckmäßigerweise so, daß an dem Hubzylinder des Hammers ein Ausleger angebracht ist mit einer zangenartigen Greifvorrichtung, die die abgetrennten Deckschicht- beziehungsweise Tragschichtteile erfassen und ausheben kann.The above-mentioned hoist can also be attached to the trailer at the same time, expediently in such a way that a boom is attached to the lifting cylinder of the hammer with a pliers-like gripping device which can grasp and lift out the separated top layer or base layer parts.

Selbstverständlich muß nicht so wie oben beschrieben gearbeitet werden, sondern es kann auch zuerst der Sägeschnitt angebracht und die durch den Sägeschnitt begrenzte Fläche bis zur Tragschicht ausgehoben und sodann in einem weiteren Arbeitsgang die Tragschicht und gegebenenfalls auch der Untergrund durch den Einsatz des hydraulischen Hammers zertrennt und anschließend ausgehoben werden.Of course, it is not necessary to work as described above, but the saw cut can also be made first and the area delimited by the saw cut can be excavated to the base layer and then the base layer and, if necessary, also the subsoil can be separated in a further operation and then be excavated.

Gleichgültig, welche Arbeitsweise bevorzugt wird, hat sich das Arbeiten mit dem Nachläufer nach der Erfindung als sehr praktikabel erwiesen, da der Nachläufer durch das an der Deichsel angebrachte, zweckmäßigerweise mittels eines Hydraulikmotors angetriebene Antriebsrad, sehr leicht zu führen und in der gewünschten Richtung zu halten ist. Dies ist nicht nur hinsichtlich der sauberen Ausführung der Begrenzungsflächen wichtig, sondern auch zur Schonung der Werkzeuge, insbesondere des Kreissägeblattes. Erleichtert wird das Führen des Nachläufers durch an den hinteren Eckpunkten des Nachläufers angebrachte, höheneinstellbare Stützräder, die nicht nur die Laufräder des Nachläufers entlasten, sondern auch die federnden Schwingungen dieser Laufachse auf die Werkzeuge ausschalten. Außerdem können die Stützräder auf ein unterschiedliches Niveau eingestellt werden, so daß auch beispielsweise an der Kante eines Bürgersteigs gearbeitet werden kann, wobei das eine Stützrad auf der Fahrbahn, das jenseitige Stützrad auf dem Bürgersteig abrollt.Regardless of which way of working is preferred, working with the trailer according to the invention has proven to be very practical since the trailer is very easy to guide and to hold in the desired direction due to the drive wheel attached to the drawbar, expediently driven by a hydraulic motor is. This is important not only with regard to the clean design of the boundary surfaces, but also to protect the tools, in particular the circular saw blade. Guiding the trailer is made easier by height-adjustable support wheels attached to the rear corner points of the trailer, which not only relieve the load on the wheels of the trailer, but also switch off the resilient vibrations of this axle on the tools. In addition, the support wheels can be set to a different level, so that work can also be carried out, for example, on the edge of a sidewalk, the one support wheel rolling on the road, the support wheel on the other side rolling on the sidewalk.

Insgesamt ergibt sich damit eine Vorrichtung, die es nicht nur gestattet, scharfkantig abgegrenzte Kopflöcher beziehungsweise Gräben herzustellen, sondern diese Arbeiten auch so abzuschließen, daß ein nachträgliches Setzen der eingefüllten Schichten nahezu ausgeschlossen ist.All in all, this results in a device which not only makes it possible to produce sharply delimited head holes or trenches, but also to complete this work in such a way that subsequent placement of the filled layers is virtually impossible.

Auf der Zeichnung ist ein Schema zur Durchführung des Verfahren sowie die Vorrichtung nach der Erfindung schematisch dargestellt, und zwar zeigen:

  • Fig. 1 ein Verfahrensschema,
  • Fig. 2 eine Ansicht der Vorrichtung bei der Deichsel,
  • Fig. 3 eine Seitenansicht und
  • Fig. 4 eine Rückansicht der Arbeitsseite des Nachläufers,
  • Fig. 5 ein Detail bei einem Stützrad.
The drawing schematically shows a scheme for carrying out the method and the device according to the invention, namely:
  • 1 is a process diagram,
  • 2 is a view of the device in the drawbar,
  • Fig. 3 is a side view and
  • 4 is a rear view of the working side of the trailer,
  • Fig. 5 shows a detail in a support wheel.

Der Aufbau einer Verkehrsfläche ist in Fig. 1 schematisch dargestellt. Dabei ist mit (7) die Deckschicht und mit (8) die Tragschicht dieser Verkehrsfläche bezeichnet, die auf dem Untergrund (9) aufliegen. Nach dem Verfahren wird die Deckschicht senkrecht oder im Winkel von 20° zur Oberfläche dieser Deckschicht (7) liegenden Kreissägeschnitt (10) zertrennt und abgehoben. Anschließend wird, in einem Abstand bis 30 cm, mittels eines hydraulischen Spatens die Tragschicht (8) entlang der gestrichelten Linie (11) aufgebrochen und auch das herausgebrochene Tragschichtmaterial entfernt. Soll das Kopfloch beziehungsweise der Graben noch tiefer geführt werden, wird der Untergrund, wie durch die gestrichelte Linie (12) angedeutet, mittels eines Baggers, vorzugsweise eines Saugbaggers, ausgehoben. Dieses Verfahren hat den Vorteil, daß die Deckschicht durch die Kreissägeschnitte (10) sauber zertrennt wird, daß sich also auch entsprechend saubere Umrandungen ergeben, die nicht nur vorteilhaft aussehen, sondern auch einwandfrei nach dem Verfüllen des Kopfloches beziehungsweise des Grabens wieder mit der verbleibenden Deckschicht (7) zu verbinden sind. Bei der Tragschicht (8) beziehungsweise beim Untergrund (9) hingegen ergeben sich sehr stark profilierte Wände, die ein Verzahnen des später einzufüllenden Untergrundes beziehungsweise Tragschichtmaterials mit dem verbliebenen Untergrund beziehungsweise den verbliebenen Tragschichten ermöglichen. Dadurch wird ein Setzen dieses Materials, wobei ein vorheriges gutes Verdichten Voraussetzung ist, vermieden und eine plane und plan bleibende Deckschicht erzielt.The structure of a traffic area is shown schematically in FIG. 1. (7) the top layer and (8) the base layer of this traffic area, which lie on the ground (9). According to the method, the top layer is cut vertically or at an angle of 20 ° to the surface of this top layer (7) circular saw cut (10) and lifted off. Subsequently, at a distance of up to 30 cm, the base layer (8) is broken up along the dashed line (11) by means of a hydraulic spade and the base layer material which has broken out is also removed. If the top hole or trench is to be deeper, the subsoil is excavated by means of an excavator, preferably a suction excavator, as indicated by the broken line (12). This method has the advantage that the top layer is cut cleanly by the circular saw cuts (10), so that it can also be cut result in correspondingly clean borders, which not only look advantageous, but are also to be connected again properly to the remaining cover layer (7) after the top hole or trench has been filled. In the base layer (8) or in the base (9), however, there are very strongly profiled walls which enable the base or base layer material to be filled in later to be interlocked with the remaining base or base layers. This avoids the setting of this material, which requires prior good compaction, and achieves a flat and level top layer.

Zur Durchführung dieses so schematisch gezeigten Verfahrens dient ein einachsiger Nachläufer (1) mit einer höhenverstellbaren Deichsel (2), die eine Kfz-Anhängerkupplung (3) aufweist. Auf dem Nachläufer ist ein Hydraulikaggregat (4) mit Verbrennungsmotor aufgebaut. Seitlich am Nachläufer (1) befinden sich Längsführungen (5), zwischen denen ein Hubzylinder (13) angeordnet ist. Die Längsführungen (5) dienen hierbei zum Ansetzen eines hydraulischen Hammers, der durch den Hubzylinder (13) auf- und abgeführt wird. An diesen Längsführungen ist weiterhin eine Halterung (14) für einen Kreissägemotor mit Kreissägeblatt vorgesehen, so daß dieser Kreissägemotor mit seinem Kreissägeblatt ebenfalls durch den Hubzylinder (13) aufund abgeführt werden kann.A single-axle trailer (1) with a height-adjustable drawbar (2), which has a motor vehicle trailer coupling (3), is used to carry out this method, which is shown schematically in this way. A hydraulic unit (4) with an internal combustion engine is installed on the trailer. On the side of the follower (1) there are longitudinal guides (5), between which a lifting cylinder (13) is arranged. The longitudinal guides (5) are used to attach a hydraulic hammer which is fed up and down by the lifting cylinder (13). A holder (14) for a circular saw motor with a circular saw blade is also provided on these longitudinal guides, so that this circular saw motor with its circular saw blade can also be moved up and down through the lifting cylinder (13).

Schwenkbar über ein Schwenkgelenk (19) ist an der Deichsel (2) ein über einen Lenker (15) lenkbares Antriebsrad (6) angebracht, das angetrieben wird von einem Hydraulikmotor. Eine Steuerung (18) sowohl für den Hydraulikmotor des Antriebsrades (16) wie auch für den Hammer und den Kreissägenmotor befindet sich an der Vorderseite des Nachläufers (1) bei dem Lenker (15).A drive wheel (6), which can be steered via a handlebar (15) and is driven by a hydraulic motor, is attached to the drawbar (2) so that it can be swiveled via a swivel joint (19). A controller (18) for both the hydraulic motor of the drive wheel (16) as well as for the hammer and the circular saw motor is located on the front of the trailer (1) at the handlebar (15).

Jeweils an den hinteren Eckpunkten des Nachläufers (1) ist eine höhenverstellbare Aufnahme (16) für ein Stützrad (17) angebracht, das, wie Fig. 5 zeigt, durch Herumklappen (Pfeil 20) an die Aufnahme (16) herangeklappt und damit in Arbeitsstellung gebracht werden kann. Die Aufnahme (16) weist in der Zeichnung eine sehr einfache Vorrichtung zur Höheneinstellung des Stützrades (17), nämlich einen manuell zu bedienenden Wagenheber auf. Selbstverständlich kann anstatt dieses Wagenhebers auch hier, da Hydraulikkraft sowieso zur Verfügung steht, ein Hydraulikkolben angebracht werden.In each case at the rear corner points of the follower (1) there is a height-adjustable receptacle (16) for a support wheel (17) which, as shown in FIG. 5, is folded up (arrow 20) to the receptacle (16) and thus in the working position can be brought. In the drawing, the receptacle (16) has a very simple device for adjusting the height of the support wheel (17), namely a manually operated jack. Of course, instead of this jack, since hydraulic power is available anyway, a hydraulic piston can be attached.

Der Nachläufer (1) kann mit seiner Anhängerkupplung (3) an die entsprechende Kupplung eines Kraftfahrzeuges angehängt werden, so daß er unschwer und schnell an den Einsatzort gebracht werden kann. Am Einsatzort wird, nach Starten des Hydraulikaggregates (4) und Verschwenken des Antriebsrades (6) in die gezeichnete Gebrauchslage, der Nachläufer (1) mittels dieses Antriebsrades (6) so verfahren, daß das Kreissägeblatt nach Absenken durch den Hydraulikzylinder (13) die Deckschicht (7) bis maximal zur Tragschicht (8) aufschneiden kann. Sodann kommt der hydraulische Hammer mit seinem Spaten zum Einsatz, der die Tragschicht (8) und/oder, je nach Höhe dieser Tragschicht (8), auch den Untergrund so zertrennt, daß eine etwa im Abstand von 5 cm bis 30 cm zum Kreissägeschnitt der Deckschicht liegende Stufe verbleibt. Das Ergebnis ist ein Kopfloch beziehungsweise ein Graben, bei dem die Deckschicht (7) sauber und exakt einer vorgegebenen Trennlinie folgend aufgeschnitten ist, an die sich sodann eine nach innen weisende Stufe bis zur eigentlichen Kopflochwand beziehungsweise Grabenwand anschließt. Nach Vornahme der Arbeiten kann das Kopfloch beziehungsweise der Graben wieder aufgefüllt, verdichtet und eine Tragschicht (8) und letztlich auch eine sich auf die Stufe auflegende Deckschicht (7) angebracht werden.The trailer (1) can be attached with its trailer coupling (3) to the corresponding coupling of a motor vehicle, so that it can be brought to the place of use quickly and easily. At the place of use, after starting the hydraulic unit (4) and swiveling the drive wheel (6) into the drawn position of use, the follower (1) is moved by means of this drive wheel (6) so that the circular saw blade, after being lowered by the hydraulic cylinder (13), covers the top layer (7) up to a maximum of the base layer (8). Then the hydraulic hammer with its spade is used, which separates the base layer (8) and / or, depending on the height of this base layer (8), also the sub-surface so that one approximately at a distance of 5 cm to 30 cm to the circular saw cut The level lying on the top layer remains. The result is a head hole or a Trench, in which the cover layer (7) is cut cleanly and exactly following a predetermined dividing line, which is then followed by an inward-facing step as far as the actual top hole wall or trench wall. After the work has been carried out, the top hole or the trench can be refilled, compacted and a base layer (8) and ultimately also a cover layer (7) lying on the step can be applied.

Claims (11)

1. A method of making access holes and trenches in paved traffic surfaces - generally traffic routes for non-rail mounted vehicles such as streets and parking areas - which have a ground and a surface structure, wherein usually the surface structure is formed from a support layer and a final top layer of bitumen or concrete, characterised in that the top layer (7) is cut open to the support layer (8) by means of a circular saw and that then at a spacing of up to 30 cm from that cut towards the inside of the access hole or the trench respectively the support layer (8) is cut through by means of a hydraulic hammer with spade and, possibly once again with a corresponding step configuration, the ground (9) is also cut through by means of the hydraulic hammer with spade and/or by means of an excavator, preferably by means of a suction excavator.
2. A method according to Claim 1 characterised in that the circular saw cut extends at an angle of 90° to 60° relative to the outside of the top layer.
3. A method according to Claim 1 or Claim 2 characterised in that the severing cut of the hammer spade is sunk in each case at the spacing of a spade width.
4. Apparatus for carrying out the method according to one of Claims 1 to 3 characterised by a preferably single-axle trailer (1) which is authorised for on-road travel, with a tow bar (2) which has a motor vehicle tow coupling (3) and on which is mounted a steerable drive wheel (6) connected to a motor (19), preferably a hydraulic motor, and arranged adjustably in respect of height, preferably by way of hydraulic lift cylinders (13), on the trailer at a lateral position are a circular saw with hydraulic motor and at a variable spacing therefrom a hydraulic hammer with spade, and a hydraulic unit (4) with drive motor is fitted on the trailer.
5. Apparatus according to Claim 4 characterised in that the circular saw and the hammer are arranged at the rear of the trailer, which is remote from the tow bar (2).
6. Apparatus according to Claim 4 characterised in that the circular saw motor can be mounted to an arm holder (14) which is pivotable between 90° and 60° relative to the surface of the top layer.
7. Apparatus according to Claim 4 characterised in that the circular saw is arranged in the working direction from 10 cm to 30 cm in front of and displaceably about 5 cm to 30 cm beside the hammer.
8. Apparatus according to Claim 4 characterised in that the circular saw and the hammer are both mounted to a common lift cylinder (13).
9. Apparatus according to Claim 4 characterised in that mounted to the lift cylinder (13) of the hammer is a pivotable arm with a tongs-like gripping device for picking up pieces of top or support layer which have been cut away.
10. Apparatus according to Claim 4 characterised in that disposed approximately at the rear corner points of the trailer (1) are support wheels (17) which can be extended and retracted and/or which can be pivoted into an operative position and which are adjustable in respect of height.
11. Apparatus according to Claim 4 characterised in that the side wall of the trailer which is towards the work is displaced inwardly to such an extent that there is still a view through to the working implements from the tow bar end.
EP89904062A 1988-03-31 1989-03-31 Process and device for making manholes in roads Expired - Lifetime EP0407435B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89904062T ATE76916T1 (en) 1988-03-31 1989-03-31 METHOD AND APPARATUS FOR MAKING HEADHOLES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3810933 1988-03-31
DE3810933 1988-03-31

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EP0407435A1 EP0407435A1 (en) 1991-01-16
EP0407435B1 true EP0407435B1 (en) 1992-06-03

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EP (1) EP0407435B1 (en)
JP (1) JPH03504882A (en)
DE (2) DE8816496U1 (en)
DK (1) DK165254C (en)
FI (1) FI90107C (en)
WO (1) WO1989009307A1 (en)

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DE8911435U1 (en) * 1989-09-26 1989-11-09 Broehl, Franz, 8560 Lauf, De
FR2706497B1 (en) * 1993-06-14 1995-09-22 Gerland Routes Method of repairing a roadway.
US5492431A (en) * 1994-03-01 1996-02-20 Concrete Textures, Inc. Methods for cutting aligned sets of slots in pavement
DE19611397A1 (en) * 1996-03-22 1997-09-25 Stellmach Paul Gerd Method and device for replacing a frame of a manhole cover embedded in an asphalt surface
US7837276B2 (en) * 2006-07-06 2010-11-23 Diamond Surface, Inc. Close proximity grinder
US20080205983A1 (en) * 2007-02-22 2008-08-28 Diamond Surface, Inc. Slot cutting apparatus
US20170211245A1 (en) 2016-01-21 2017-07-27 Diamond Surface, Inc. Reduced volume sonic noise alert pattern grinder & method

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FR1142699A (en) * 1956-02-16 1957-09-20 Process for repairing or forming joints between concrete slabs and machine for the implementation of this process
AT246767B (en) * 1965-01-29 1966-05-10 Walter Dipl Ing Schimmel Process for the repair of traffic areas, preferably roadways and sidewalks, after excavations and devices for this
DE2355232A1 (en) * 1973-11-05 1975-05-22 Lothar Behrens Road surface breaking machine for making trenches - has pivoted support for breaking hammers acting at different depths
DE2530225A1 (en) * 1975-07-07 1977-01-27 Hoffmann Geb Eisler Elisabeth Mobile road surface working machine - has variable speed steering wheel and holders for air compressor connected appliances
US4640551A (en) * 1978-12-04 1987-02-03 Marten Edward N Rock saw unit for hard rock earth formations
FR2582029B1 (en) * 1985-05-20 1989-06-23 Gerland PROCESS FOR THE DEFINITIVE RECONSTITUTION OF PAVEMENT LAYERS ON LONGITUDINAL SLICES
DE3616060A1 (en) * 1986-05-13 1987-11-19 Rapa Baudienst Gmbh DISC SHAPED MILLING TOOL
DE3620120A1 (en) * 1986-06-14 1987-12-17 Franz Broehl Displaceable add-on milling machine for road construction, building construction or the like
SU1562377A1 (en) * 1988-04-25 1990-05-07 Государственный Дорожный Научно-Исследовательский Институт Method of repairing asphalt pavings

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DK165254C (en) 1993-03-08
DE58901614D1 (en) 1992-07-09
EP0407435A1 (en) 1991-01-16
DK231890A (en) 1990-11-27
WO1989009307A1 (en) 1989-10-05
FI90107B (en) 1993-09-15
JPH03504882A (en) 1991-10-24
FI904760A0 (en) 1990-09-27
DK231890D0 (en) 1990-09-25
DE8816496U1 (en) 1989-11-09
US5192160A (en) 1993-03-09
DK165254B (en) 1992-10-26

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