EP0469272A1 - Procédé et dispositif pour travailler les revêtements routiers - Google Patents

Procédé et dispositif pour travailler les revêtements routiers Download PDF

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Publication number
EP0469272A1
EP0469272A1 EP91109912A EP91109912A EP0469272A1 EP 0469272 A1 EP0469272 A1 EP 0469272A1 EP 91109912 A EP91109912 A EP 91109912A EP 91109912 A EP91109912 A EP 91109912A EP 0469272 A1 EP0469272 A1 EP 0469272A1
Authority
EP
European Patent Office
Prior art keywords
roughening
elements
screed
road surface
paver
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP91109912A
Other languages
German (de)
English (en)
Other versions
EP0469272B1 (fr
Inventor
Karlheinz Dipl.-Ing. Piayda
Erich Resch
Erich Dipl.-Ing. Schmidt
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.)
Joseph Voegele AG
Original Assignee
Joseph Voegele AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Joseph Voegele AG filed Critical Joseph Voegele AG
Publication of EP0469272A1 publication Critical patent/EP0469272A1/fr
Application granted granted Critical
Publication of EP0469272B1 publication Critical patent/EP0469272B1/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
    • E01C23/08—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 roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades
    • E01C23/085—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 roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades using power-driven tools, e.g. vibratory tools
    • E01C23/0855—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 roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades using power-driven tools, e.g. vibratory tools moved rectilinearly, e.g. scabblers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/26—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by impact tools, e.g. by chisels or other tools having a cutting edge
    • B28D1/265—Scabbling machines or scabbling tools
    • 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
    • E01C2301/00—Machine characteristics, parts or accessories not otherwise provided for
    • E01C2301/50—Methods or devices for preventing dust by spraying or sucking

Definitions

  • the invention relates to a method of the type specified in the preamble of patent claim 1 and to a device which is expedient for carrying out the method according to the preamble of patent claim 5 and a pavement paver according to the preamble of claim 19.
  • a transversely movable carriage with a vertically adjustable plate is mounted in a movable chassis.
  • Pneumatic cylinder-piston units are attached to the plate, the pistons of which are connected to impact hammers which represent working elements.
  • Each working element is lifted pneumatically from the pavement and, when a changeover point is reached, pneumatically accelerated downwards and hammered onto the pavement. If the working element reaches a certain depth, it remains below. If the depth of penetration is too small, the working element is raised again pneumatically and accelerated downwards again when the changeover point is reached.
  • the impact force is limited by the possible acceleration and the mass of the working element including the piston rod and the piston.
  • the impact frequency results from the mass, the pneumatic pressure, the height adjustment of the working element and mainly from the elasticity and / or the hardness of the road surface and is variable.
  • the working element is accelerated by the pneumatic pressure pulse; when it is opened, the pneumatic pressure is no longer effective, since the piston is relieved of pressure beforehand. Since the energy stored by the working element for each stroke is limited, it must be brought into action as suddenly as possible in order to have an effect. Hammering, however, leads to grain fragmentation and the removal of parts of the pavement, which is desirable when leveling, but is undesirable for roughening. The roughening effect is unsatisfactory because the impact and the removal result in a flat but in turn relatively smooth surface of the pavement.
  • the known method and the device used for it are only suitable to a limited extent for roughening polished carriageways (track grooves with the risk of aquaplaning, smeared braking or acceleration zones, and the like.)
  • polished road surfaces are treated with balls, rollers or other tools, which are attached to the underside of a vibrating plate as attachments and come into play in a striking or hammering manner.
  • roller bodies subjected to load are rolled over the road surface in order to roughen them by cracking.
  • the roller bodies can be subjected to vibration in addition to the load.
  • the device known for performing the method is a self-propelled vehicle, on the vehicle frame of which the relatively narrow roller bodies are suspended.
  • the known method has to be repeated several times, because the roughening effect which can be achieved per unit area is low due to the load, even by being superimposed with a vibration.
  • the time and energy required for roughening are high. A uniform roughening effect can only be achieved with constant, great care by the driver.
  • the vehicle itself is an expensive special vehicle.
  • the invention has for its object to provide a method of the type mentioned and a suitable device for carrying out the method and a pavement paver with which road surfaces are roughened better than before with little and well used energy.
  • the object is achieved according to the invention with the method according to the characterizing part of patent claim 1 and with a device according to the characterizing part of claim 5 and with a ceiling paver according to claim 19.
  • the roughened surface is pressed in without impact elements and their movements along the pavement formed even grooves. Because of the swelling forces supported by their reaction forces on the large mass above, almost all of the energy is used for roughening. Since the applied roughening elements are pressed in without impact by a swelling force, the material of the pavement is only gently displaced and only shredded or removed to a negligible extent.
  • the threshold forces are not comparable to forces generated by vibration or mass acceleration, the mechanical effects of which on the road surface result from the deceleration of accelerated masses.
  • the swelling forces pressing the roughening elements into the road surface can be substantially greater than forces that can be generated by vibration; Despite the higher absolute force value, they are much gentler than this. A uniform and intensive roughening effect can be achieved with a single pass with reasonable energy consumption.
  • the device As a roughening screed add-on unit, the device is an independent work unit that can be combined with practically any towing vehicle that can provide the appropriate drive and energy supply.
  • the mass represented by the individual components is the key to gentle and intensive roughening.
  • the threshold forces are supported upwards and can be brought to full effect via the working elements in the pavement.
  • the device is robust and structurally simple, user-friendly, universally applicable and low-wear.
  • the drives are supported, as it were, against a stationary abutment, while they press the roughening elements into the road surface in a precisely predetermined manner.
  • this is an inexpensive aspect that is important in terms of transport and universal use.
  • the feared grain crushing and the removal of components do not occur in operation. It is surprisingly found that even small grains or stones are scratched with the device without breaking and remain fixed in the bond.
  • the device works with little noise and dust and above all without any noticeable vibration, which is advantageous and environmentally friendly for the device service life.
  • the paver is expanded to a roughening machine by the attached roughening screed removal unit.
  • a normal screed however, it can be operated in the usual way. So far, it has been common to use different machines for roughening and finishing the ceiling, which is expensive and time-consuming due to the transportation, storage and maintenance. Practically every paver can be converted by installing the appropriate roughening screed add-on unit.
  • high indentation forces can be generated for the roughening elements, so that smooth or difficult to roughen road surfaces due to their nature can be roughened evenly in one pass and to the desired degree of roughness. Because of the frequency of the swelling forces, the masses above it go towards infinity in the dynamic phase; it can no longer be raised by the reaction forces of the threshold forces.
  • the absolute value of the threshold forces can be greater than the static weight of the mass; the frequency ensures in the dynamic phase that the mass and therefore the device does not start to oscillate. This leads to a low-noise, practically vibration-free process sequence and to a precisely adjustable roughening.
  • threshold strength values of different strengths can be set precisely and reproducibly.
  • Generating the swelling forces hydraulically has the advantage of a precisely determined course of force over time.
  • the force curve is matched to an optimal roughening effect and the type of pavement.
  • the method variant according to claim 4 is also important because the phase shift makes the method sequence quiet.
  • the quality of the roughening is of high quality, since neighboring roughening elements do not act simultaneously and do not influence one another.
  • the embodiment according to claim 6 is adjustable in the working width to the respective requirements and convertible even during operation.
  • a road surface paver is the ideal towing vehicle in the embodiment according to claim 7.
  • the roughening screed attachment is attached instead of the usual screed.
  • the paver provides the drive energy for the drives of the demolition unit and can be driven sufficiently slowly and precisely. A separate towing vehicle is not needed.
  • the offset and arranged in rows one behind the other roughening elements allow an individual adaptation to the profile of the road surface, each roughening element being machined in a relatively small area and subject to low loads. This enables the roughening elements to have a long service life.
  • Hydraulic working cylinders allow a precisely reproducible setting of the value of the course of the threshold forces.
  • Each Roughening element works at the just correct height specified by the road surface profile.
  • the usual hydraulic basic pressure keeps the roughening elements in contact with the road surface between the effects of the swelling forces. Even very powerful working cylinders can be accommodated in a small space.
  • the control and the power supply are technically simple.
  • the energy input is matched to the respective working width.
  • a uniform roughening is achieved over the set working width.
  • the embodiment according to claim 11 is advantageous in terms of manufacture, maintenance and repair.
  • the tool insert can be selected for the respective type of pavement.
  • the strip-shaped tool insert can be in one piece or in several parts or have several pyramid-shaped teeth.
  • the roughening elements are guided and supported cleanly when working.
  • the joint enables each roughening element to adapt to the road surface profile so that the tool insert works evenly.
  • the joint also excludes oblique forces on the working cylinder.
  • Adjacent holders can be placed very close together.
  • the transverse movement generated by the transverse drive leads to serpentine grooves during the movement of the device, which results in a uniform roughening effect for different directions of travel.
  • the groove network becomes very dense due to the serpentine shape.
  • the serpentine shape is also advantageous in terms of driving safety (no guiding effect for vehicle tires) and driving comfort (no roaring noises).
  • the embodiments according to claim 17 and claim 18 are also important because the environment is protected from the dust and dirt that is inevitably generated when roughening, and because the vehicle driver can also work unhindered by the dust and concentrate on his work.
  • the transverse drive which is used for the serpentine grooves, can be accommodated in a pavement paver particularly expediently according to claim 20.
  • a stroke of approx.12.5mm on each side is sufficient.
  • the transverse elasticity of the cantilevers can be used without any structural modification.
  • a device V for roughening a road surface (concrete or bituminous road surface) is designed as a roughening screed add-on unit A and provided with fastening elements E in order to, e.g. connected to booms B to be pulled over the road surface to be roughened by a tractor vehicle.
  • the towing vehicle can be of any type. Since the device V, which can be designed with a fixed width, so to speak in one piece, but according to FIGS.
  • the device V has a plurality of roughening elements W arranged transversely to the main direction of movement F in three rows, which abut the road surface from above and are pressed into the road surface by drives P.
  • the roughening elements W are individually guided vertically up and down in a carrier 3.
  • a support part sliding plate 4 or rollers 4a
  • the frame 2 is firmly seated on the frame parts 1 lying on top.
  • the drives P for the roughening elements W are firmly connected to the frame 2 and are coupled at least in the pressure direction downward with the roughening elements W.
  • the screed attachment parts Z are designed similarly.
  • the carrier 3 for the roughening elements W is attached to the frame 2 of each screed attachment Z.
  • the screed attachment parts Z are attached with their upper parts 5 via sliding guides 6, 7 to the upper part 1 of the screed main part H and can be extended laterally by means of drive devices (not shown) in order to adapt the working width to the respective requirements (FIG. 2).
  • Such screed concepts are known in paver manufacturers for the screeds used there.
  • Front and rear guide elements 8, 9 and intermediate sliding plates 10 are arranged in the carrier 2 for the roughening elements W.
  • Each roughening element W consists of a cuboid holder 11 and a tool insert 12 on the underside.
  • the drives P are hydraulic working cylinders which are connected to a control device 35, e.g. a rotary valve 37, s.
  • Fig. 6, and a pressure supply 33 are connected.
  • a separate drive P is assigned to each roughening element W.
  • the drives P generate downward swelling forces for the roughening elements W and are supported upwards on the frame 2 and on the large mass M of the device V.
  • the threshold forces are generated at a frequency which is above the natural frequency of the mass M, e.g. in a range between 50 and 70 Hertz.
  • the mass M approaches infinity, so that the drives P can generate swelling forces which, in themselves, can raise the device in the static phase.
  • the frequency of the swelling forces is ensured by the frequency of the swelling forces above the natural frequency of the mass that the swelling forces from the roughening element W are fully introduced into the pavement, because the mass above acts like an upper rigid abutment and cannot be lifted.
  • the device V is moved in the direction F along the road surface. There are parallel, closely spaced grooves from a depth of up to 6mm, for example.
  • a transverse drive C periodically moves the device V back and forth at the same time (arrow Q). The overlapping of the two movements results in a serpentine groove pattern in the pavement.
  • the drive C can e.g. be a hydraulic eccentric drive that engages the device V laterally.
  • each tool insert 12 can be approximately 75 mm, the transverse distance between the tool inserts 12 is at most 150 mm.
  • the drives P can be disconnected individually from the pressure supply.
  • the drives P can expediently be switched off in groups (group Gr in FIG. 2). With a small working width, this avoids that areas overlapping in the direction of travel F work twice.
  • the tool insert 12 e.g. detachably fixed by soldering or screwing.
  • the tool insert 12 has downward facing, e.g. pyramid-shaped roughening teeth 25. At least the roughening teeth 25 consist of hard metal.
  • Each roughening element W is incorporated as a cross member in a rigid frame-shaped part 13 which has a cross yoke 16 and connecting elements 14 and 15. Through holes 17 are provided in the transverse yoke 16.
  • a counter bearing 18 is attached to the side facing the drive P, on which a working piston 21 of a hydraulic working cylinder 19 engages.
  • the working cylinder 19 is screwed into the frame 2.
  • connection 20 for a hydraulic supply line 34 which is connected via the control device 35 to a pressure line 33 or a pressure source 36.
  • the counter bearing 18 and the working piston 21 form a joint G which, although transmitting downward pressure forces from the working piston 21 to the roughening element W, at the same time permits pivoting movements of the roughening element W in FIG. 3 parallel to the plane of the drawing.
  • the tool insert 12 adapts to the respective road surface profile (track grooves, depressions, crests).
  • the device V serves as a towing vehicle S for the device V a pavement paver D.
  • the device V is attached by means of fastening elements E as a roughening screed attachment A with its fastening elements E. .
  • the Drives P of the device V are connected to the supply of the paver D.
  • a dust extraction device 28 is provided in the front of the finisher D, which sucks off dust that arises during work.
  • the driver's cab is encapsulated with a dust-proof cabin 29.
  • a chassis 26 designed as a wheel or crawler chassis is arranged in a substructure 27 of the paver D.
  • the side arms 30 are pivoted at 31 on the base 27.
  • a hydraulic support device 32 serves to raise the attachment unit A. It can also be used as a relief device to regulate the contact pressure of the attachment unit A.
  • the paver D is operated with the screed R, then it is equipped with the usual goods receiving, goods conveying and dispensing means. When used with the roughening screed attachment unit A, these components can be removed.
  • the paver D can therefore be used to apply a road surface with simultaneous smoothing and compaction of the road surface using a high compression screed R or after replacing the screed R with the roughening screed attachment unit A for roughening smooth road surfaces.
  • the roughening screed add-on unit is dimensioned such that it also fits on pavers D that have already been in operation.
  • the drive C for the transverse movement of the device V is arranged between the side arms 30 and the substructure 27 of the paver D. Either the lateral elasticity of the side arms 30 is used for the transverse movement.
  • the side arms 30 can also be mounted at 31 with a game that allows the transverse movements of the device V.
  • FIG. 6 shows schematically how the roughening elements W are acted upon hydraulically and how they are acted upon.
  • the left-hand group of the roughening elements W in FIG. 6 belongs to half a row of the roughening elements W in the screed main part H (FIG. 2).
  • the right group of roughening elements W is a row of roughening elements W in the screed add-on part Z.
  • the drives P of the roughening elements shown in FIG. 6 are controlled jointly by a control device 35, namely the rotary slide valve 37.
  • a total of six rotary valves are required, which can be coupled to one another.
  • a whole row of the main screed part H and the screed add-on parts Z works with a phase shift to the next row.
  • the frequency is set the same for all rows.
  • the drives P in the screed add-on parts Z can be individually separated from the associated rotary valve 37 by shut-off valves 43. If there are three drives P in the screed attachment parts Z, which are arranged at an angle one behind the other, the shut-off valves 43 are coupled to one another in order to form a group Gr of roughening elements W which can be switched on or off together. Switching off and on can be done mechanically, hydraulically or electrically.
  • the rotary valve 37 is arranged in a hydraulic circuit and is driven by a hydraulic motor 38.
  • the operating speed of the hydraulic motor is set by an adjustable drain regulator 39.
  • the system pressure is monitored by an adjustable pressure relief valve 40.
  • the pressure medium provided by the pressure source is divided via a flow divider on the one hand to the hydraulic motor 38 and on the other hand to the rotary valve 37.
  • a pressure accumulator 42 is provided in the connection from the flow divider 41 to the rotary slide valve 37.
  • the device V For roughening the device V, e.g. 1 and 2, dragged in the main direction of movement F over the road surface to be roughened, driving on the smoothing plates 4 and the rollers 4a.
  • the roughening elements W are adjusted in their height so that they have no contact with the ground at first.
  • the control device 35 is actuated so that each roughening element W is periodically subjected to swelling forces and pressed into the pavement.
  • the reaction forces from the threshold forces are transmitted to the frame 2 and to the large mass M lying above the roughening elements W. Since the frequency of the swelling forces lies above the natural frequency of the mass M, the mass remains practically motionless.
  • the roughening elements W carve continuous grooves into the pavement without a hammering or striking effect.
  • the drive V simultaneously moves the device V back and forth in the transverse direction Q, which produces a serpentine groove pattern.
  • Each roughening element W adapts to the contour of the pavement, so that even very uneven pavements are roughened evenly.
  • the return springs 24 pull the roughening elements W back into a predetermined basic position. If necessary, the roughening screed attachment unit A can also be raised by the device 32 of the paver D.
  • the screed add-on unit A is designed as a screed with a fixed width or as a extending screed, it can be attached to any other towing vehicle that is able to ensure the sufficient hydraulic energy supply and is slow with ge driving at a precisely maintained speed. It is also conceivable to provide the screed add-on unit A with its own energy supply, so that the towing vehicle only has to generate the main driving movement. Furthermore, it is conceivable to apply the described principle of coupling the roughening elements individually to hydraulic swelling force drives and supporting the reaction forces from the swelling forces upwards against a large mass in a roughening vehicle with a structurally integrated device V. Thanks to the low-vibration operation, the device could be integrated into the chassis of a conventional truck or connected to the chassis at the rear or front.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)
  • Road Repair (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Soil Working Implements (AREA)
EP91109912A 1990-08-03 1991-06-17 Procédé et dispositif pour travailler les revêtements routiers Expired - Lifetime EP0469272B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4024711A DE4024711C2 (de) 1990-08-03 1990-08-03 Verfahren und Vorrichtung zum Bearbeiten einer Fahrbahndecke
DE4024711 1990-08-03

Publications (2)

Publication Number Publication Date
EP0469272A1 true EP0469272A1 (fr) 1992-02-05
EP0469272B1 EP0469272B1 (fr) 1993-09-08

Family

ID=6411616

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91109912A Expired - Lifetime EP0469272B1 (fr) 1990-08-03 1991-06-17 Procédé et dispositif pour travailler les revêtements routiers

Country Status (6)

Country Link
EP (1) EP0469272B1 (fr)
JP (1) JP2617635B2 (fr)
AT (1) ATE94233T1 (fr)
DE (2) DE4024711C2 (fr)
DK (1) DK0469272T3 (fr)
ES (1) ES2044652T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114016357A (zh) * 2022-01-10 2022-02-08 中交一公局桥隧工程有限公司 一种公路路面沥青混合料摊铺装置

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DE59201615D1 (de) * 1992-03-26 1995-04-13 Voegele Ag J Aufrauh-Ausziehbohle.
DE10208988B4 (de) * 2002-02-28 2010-04-01 Baulabor Dr.-Ing. Richter Verfahren und Vorrichtung zum Aufrauhen von Straßenbelag
US20050058507A1 (en) † 2003-09-17 2005-03-17 Cedarapids, Inc. Multi-use paving tractor with tool attachments
US7458747B2 (en) 2003-09-17 2008-12-02 Cedarapids, Inc. Frame raising multi-use paving tractor with blind mateable quick connecting tool attachments
CN111851228B (zh) * 2020-07-28 2021-08-31 荆州市五维公路勘察设计有限公司 一种道路施工路面凿毛处理设备及处理工艺

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GB1032455A (en) * 1963-05-28 1966-06-08 Non Impact Surfaces Ltd Improvements in or relating to apparatus for treating road surfaces
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DE2719692A1 (de) * 1977-05-03 1978-09-14 Voegele Ag J Einbaubohle fuer strassendeckenfertiger
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JPS6145227U (ja) * 1984-08-29 1986-03-26 澄彦 栗田 自動車用換気冷房装置
JPH0242725Y2 (fr) * 1984-12-27 1990-11-14
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Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB422842A (en) * 1933-06-20 1935-01-21 James Thomas Mitchell Johnston Improvements in or relating to road-making and-repairing apparatus
GB1032455A (en) * 1963-05-28 1966-06-08 Non Impact Surfaces Ltd Improvements in or relating to apparatus for treating road surfaces
DE2246749A1 (de) * 1971-09-22 1973-03-29 Klarcrete Ltd Fahrbahn-nivelliermaschine
DE2719692A1 (de) * 1977-05-03 1978-09-14 Voegele Ag J Einbaubohle fuer strassendeckenfertiger
DE3209989A1 (de) * 1981-04-07 1983-09-29 Joseph Vögele AG, 6800 Mannheim Deckenfertiger

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114016357A (zh) * 2022-01-10 2022-02-08 中交一公局桥隧工程有限公司 一种公路路面沥青混合料摊铺装置

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Publication number Publication date
ES2044652T3 (es) 1994-01-01
JP2617635B2 (ja) 1997-06-04
DE59100362D1 (de) 1993-10-14
ATE94233T1 (de) 1993-09-15
DE4024711A1 (de) 1992-02-13
EP0469272B1 (fr) 1993-09-08
DE4024711C2 (de) 1994-03-17
JPH04231506A (ja) 1992-08-20
DK0469272T3 (da) 1994-01-03

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