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WO2020193084A1 - Pont mobile et élément portique, et élément chaussée pour le pont mobile - Google Patents

Pont mobile et élément portique, et élément chaussée pour le pont mobile Download PDF

Info

Publication number
WO2020193084A1
WO2020193084A1 PCT/EP2020/055485 EP2020055485W WO2020193084A1 WO 2020193084 A1 WO2020193084 A1 WO 2020193084A1 EP 2020055485 W EP2020055485 W EP 2020055485W WO 2020193084 A1 WO2020193084 A1 WO 2020193084A1
Authority
WO
WIPO (PCT)
Prior art keywords
bridge
elements
mobile bridge
portal
roadway
Prior art date
Application number
PCT/EP2020/055485
Other languages
German (de)
English (en)
Inventor
Jürg MERIAN
Original Assignee
Bundesamt Für Strassen Astra
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 Bundesamt Für Strassen Astra filed Critical Bundesamt Für Strassen Astra
Publication of WO2020193084A1 publication Critical patent/WO2020193084A1/fr

Links

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
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D15/00—Movable or portable bridges; Floating bridges
    • E01D15/12—Portable or sectional bridges
    • E01D15/127—Portable or sectional bridges combined with ground-supported vehicles for the transport, handling or placing of such bridges or of sections thereof
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D18/00—Bridges specially adapted for particular applications or functions not provided for elsewhere, e.g. aqueducts, bridges for supporting pipe-lines

Definitions

  • the present invention relates to a mobile bridge, a portal element for the mobile bridge and a
  • the motorway network can be planned and set in such a way that the traffic flow is not or only to a small extent
  • Sections of the motorway have to be relocated into the night as there is less traffic at night
  • Time windows with little traffic are getting smaller and smaller, even at night, so that larger ones are Maintenance work, such as re-surfacing, can drag on for weeks or even months. Furthermore, in the remaining usable time window with less
  • the object of the present invention was therefore to reduce at least some of the problems mentioned above as far as possible.
  • the present invention initially relates to a mobile bridge with a longitudinal axis, comprising:
  • the access ramp, the bridge elements and the departure ramp can be detachably coupled and at least some of the bridge elements have undercarriages that allow a first displacement component of the bridge in the direction of the longitudinal axis and / or a second displacement component of the bridge transversely to the longitudinal axis in order to move the bridge into any position bring.
  • the renovation work can be carried out under a roof, which enables weatherproof work;
  • each chassis has a vertical axis about which the chassis can be rotated.
  • a variant of the mobile bridge according to the invention is that at least one of the following elements can be lifted:
  • the bridge element is either a portal element or a roadway element (intermediate plate), the portal element and the roadway element being the same
  • the portal element has a substructure with the chassis and a superstructure with a
  • the roadway element can be coupled to the respective, adjacent roadway section in order to form one or more lanes.
  • a coupling is preferably carried out by means of hydraulically movable bolts or screwed straps to form non-positive connections.
  • a protective mat for example a
  • vulcanized rubber mat is provided.
  • Carriageway sections are dimensioned in such a way that no special permits are required for their transport in accordance with the relevant standards.
  • the bridge elements are so
  • At least one drive unit is provided for driving the chassis.
  • the at least one drive unit is preferably via a Communication line for controlling one
  • Central unit can be connected to this.
  • Portal elements connected to the roadway elements are possible, so that the bridge can be moved as a whole.
  • the portal elements can, however, also be controlled and moved individually.
  • the roadway element consists of a central part and two peripheral parts.
  • the connecting element on the side of the roadway element has a pin with a bore transversely to a longitudinal axis of the pin, that the connecting element has a sleeve on the portal element side for receiving the pin and that an operatively connected to a locking cylinder Bolt is provided, which can be inserted into the bore of the pin when the portal element and roadway element are assembled.
  • Portal element and track element is adjustable.
  • the present invention also relates to a
  • Portal element for a mobile bridge having a longitudinal axis according to the present invention, the portal element having a substructure with at least three, preferably four
  • the portal element consists in the fact that the track section in the longitudinal axis of the mobile bridge has connecting elements, preferably in the form of hydraulically movable bolts or tabs, for the formation of non-positive connections.
  • Portal element consist in that it has a sleeve for receiving a pin of a roadway element and that a bolt that is operatively connected to a locking cylinder is provided, which when the portal element and roadway element are joined together in a bore in the bolt running transversely to the longitudinal axis of the bolt with the help of a
  • Locking cylinder is insertable.
  • Further design variants for the portal element according to the invention consist in that the chassis can be retracted or that support elements can be extended so that the
  • Support elements assume a load distribution on a sub-floor.
  • Drive unit is provided for driving the chassis, the drive units preferably via a
  • Lane element for the mobile bridge according to the invention which is in the longitudinal axis of the mobile bridge
  • Connecting elements preferably in the form of hydraulically movable bolts or tabs, to form
  • FIG. 1 shows a side view of a mobile bridge according to the present invention
  • FIG. 3 shows a section transverse to the direction of travel of a four-lane motorway in which a mobile bridge according to the present invention is in use in one direction of travel
  • Fig. 4 is a section transverse to the direction of travel through a
  • FIG. 5 shows a side view of the portal element according to FIG.
  • FIG. 6 shows a section of an embodiment variant of the mobile bridge according to the invention with two portal elements and with one with the two
  • a mobile bridge 1 according to the present invention is shown in a side view.
  • the mobile bridge 1 has an access ramp 2, a work area 3 and an exit ramp 3 and enables
  • the maintenance work can be carried out in particular in the work area 3 of the mobile bridge 1, since in
  • Working height can be 310cm, for example.
  • Work area 3 is divided, for example, into a 106 m long sub-area in which the construction work is carried out, and a staging area of
  • the working area 3 is 106m + 25m + 25m, a total of 156m long. It goes without saying that the length of the working area 3 can differ significantly from this specific length, and consequently the length of the mobile bridge 1 according to the invention can be selected as desired.
  • the mobile bridge 1 is modular, can be used repeatedly and is intended for the temporary guidance of road traffic in an elevated position above the roadway.
  • the bridge shown in Fig. 1 is for two lanes - i. E. 2 lanes in the same direction of travel - designed.
  • a single-lane operation with two-way traffic or a single-lane operation for special transports without it is also conceivable
  • the entry and exit to the space under the mobile bridge 1 takes place via the logistics lane LS (FIG. 3).
  • the total length can also be shorter or significantly longer.
  • the access ramp 2 and the departure ramp 4 result from the desired working height in the working area 3 and the selected gradient for the access ramp 2 or the selected gradient for the departure ramp 4.
  • the mobile bridge according to the present invention is also particularly suitable for roadway sections
  • Curve sections up to a radius of at least 1000m and a gradient of no more than 3 °. applicable. This enables unrestricted use of the mobile bridge
  • present invention consists of transportable
  • the bridge deck is also made of steel, for example, and is provided with a non-slip thin layer (epoxy and sprinkled quartz sand).
  • a non-slip thin layer epoxy and sprinkled quartz sand. The size and weight of the elements are chosen so that you
  • the mobile bridge 1 In the working area 3 and in the upper area of the construction, the mobile bridge 1 consists of the mobile substructure and the elevated roadway. Only in the first half of the access and exit ramps 2 and 4, which are directly on the during use
  • the mobile bridge 1 via support elements 10 becomes one Chassis 8 (Fig. 5) placed on the roadway and acts in one embodiment of the present invention as a stationary support structure. It can be opened during a break in operation with the help of hydraulic cylinders
  • Wheel racks (chassis 8 - Fig. 5) are lifted as a whole and moved in the longitudinal and transverse directions.
  • the lower ends of the access and exit ramps 2 and 4 can be hydraulically removed from the road surface before they are moved
  • the chassis 8 are driven by units which are arranged, for example, in the upper area of the access and departure ramps 2 and 4 on the underside of the bridge carriageway.
  • FIG. 2 schematically shows a modular structure of the mobile bridge 1.
  • portal elements 6 and track element 7 can be seen, the portal elements 6 in addition to a
  • Roadway elements 7 serve to connect the portal elements 6 in the upper area and complement the roadway between the neighboring ones
  • Downhill ramp 4 have ramp elements 5 and
  • the ramp elements 5 are identical to Ramp end elements 5.
  • the respective ramp end elements 12 can also have undercarriages that can also be raised by means of hydraulic cylinders so that the mobile bridge 1 can be moved as a whole without the
  • the length of the mobile bridge 1 can be selected by adding or removing portal elements 6 and roadway elements 7 - which can be done for example during the night.
  • An existing mobile bridge 1 can also be lengthened or shortened by dividing the work area 3 and adding or removing portal elements 6 and roadway elements 7 - again preferably during the night - and then put into operation again in the new length.
  • FIG. 3 shows a four-lane motorway in a section transversely to the direction of travel, each with two directionally separated lanes FS and with a hard shoulder PS pro
  • a mobile bridge 1 was built according to the present invention and accordingly over the to
  • the mobile bridge 1 is correspondingly transversely across this lane FS
  • the logistics lane then being implemented on the right side of the mobile bridge 1 in the area of the breakdown lane PS and the right lane FS.
  • the present invention thus enables operation with two lanes FS in the same direction of travel
  • FIG. 4 shows an enlarged section transversely through the mobile bridge 1 in the area of a portal element 6, as can already be seen in reduced size from FIG.
  • the mobile bridge 1 has two lanes FS with one each
  • Lane width 18 of, for example, 3m.
  • Under the roadway element 7 of the mobile bridge 1 is a
  • Working width 14 of, for example, 5.20m available.
  • the roadway elements 7 are sealed so that no
  • the working width 14 corresponds to the bridge width 15 minus the support element width 16 required by the support elements 10 or by the chassis 8.
  • the roadway element 7 has side guardrail elements 19 which can be easily dismantled or folded inward when the mobile bridge is dismantled.
  • the support elements 10 can be seen, which are provided for receiving and distributing the bridge load and can be lowered for this purpose.
  • Another embodiment variant is that the chassis 8 is retracted until the
  • Support elements 10 can absorb the bridge load.
  • support elements 10 can have a fixed length.
  • Footplates of all support elements 10 are coated with rubber. This insulation prevents and reduces impressions in the road surface at high air temperatures
  • Fig. 5 shows the portal element 6 in side view.
  • the portal element 6 consists of a superstructure with the roadway section 9 and a substructure with the chassis 8.
  • the roadway section 9 has coupling points 24 and 25 via which a coupling with the adjacent roadway element 7 (not shown in FIG. 5) for Extension of the lane FS can be done.
  • the adjacent roadway element 7 not shown in FIG. 5
  • Coupling points 24 and 25 made of hydraulically movable bolts. Other non-positive connections, in particular using tabs, are also conceivable.
  • the chassis 8 has a chassis 27, at the ends of which the support elements 10 are arranged in the axial direction of the mobile bridge.
  • the support element 10 are in the embodiment variant of the present invention shown as
  • Support elements 10 are provided with drive units 28 with tire wheels which can be rotated independently of one another about their vertical axis, for example in a range of 260 °. This allows maximum maneuverability of the portal element 6 and thus of the entire mobile bridge 1.
  • the chassis 8 used allow the mobile bridge 1 to be moved into any position that can be predetermined, with each displacement being caused by one
  • Displacement vector can be represented in a first displacement component of the bridge in the direction of the longitudinal axis M of the bridge and in a second
  • the chassis 8 also includes an aggregate unit 20, which supplies the drive units 28 with energy.
  • it has interfaces for connecting multiple portal elements 6 in order to enable synchronous control of the large number of portal elements 6 interconnected via roadway sections 9.
  • the interfaces can include wired or wireless signal transmission, or both. If four chassis are provided per portal element 6, as is provided in the variant embodiment according to FIG. 5, a portal element 6 can be controlled like an individual vehicle. Such a portal element 6 can therefore be moved to the desired position independently - for example manually or controlled by a GPS signal - or via a control unit operated by an operator when the mobile bridge 1 is being erected.
  • the support elements 10 are fixedly mounted.
  • Drive units 28 are retractable so that when
  • the portal element 6 can be moved and the bridge load is transmitted to the base floor via the fixed support elements 10 when the drive units 28 are retracted.
  • the guardrail element 19 is on a
  • Lane section length 26 corresponding to the
  • Roadway section 9 can also be coupled to the guardrail elements 19 of the adjoining them
  • the guardrails can be increased to one meter (not shown in FIG. 5) by doubling them. This measure leads to a guardrail if road users leave their vehicle on the mobile bridge 1.
  • the mobile bridge is only released for operation when it is fixedly deposited on its support elements 10.
  • a shift in the longitudinal direction of the mobile bridge to another location then has the consequence that the traffic has to be diverted, for example, to the logistics lane or stopped until the mobile bridge is again placed on the support elements 10 in its new location.
  • the mobile bridge or its portal elements 6 are not supported on the support elements 10, but only on the drive units 28. Moreover, it is then - in another
  • Variants of the present invention - conceivable that the mobile bridge during operation, i. is being moved during the construction work and / or traffic rolls over the mobile bridge. The road users then virtually drive onto the moving mobile bridge and move over it while it moves itself.
  • Roadway sections can use the hydraulically controlled cylinders in the support elements 10 to raise or lower the roadway elements and roadway sections Transverse inclination of the roadway elements and the roadway sections can be set so that the water present on the roadway elements and the roadway sections can flow off laterally.
  • the longitudinal gradient of the roadway in the access and exit ramps is limited to a maximum value of approximately 6.1% with regard to operation, for example at a maximum speed of 60 km / h.
  • the portal elements are designed in the upper area of the access and exit ramp so that the vertical
  • the rounding of the bridge axis is reproduced as well as possible in order to prevent the hitching up of lowered coaches.
  • the longitudinal inclination is set individually for each portal element thanks to its individual mounting.
  • the roadway i.e. the superstructure
  • the steel structure has ribs with a closed cross-section, which are stretched in the direction of travel and act in solidarity with the sheet metal, and are supported by cross members.
  • the roadway consists of suspended roadway elements 7 (Fig. 1 and 2) and from Roadway sections 9 together with parking base, which are mounted on the chassis 8.
  • the roadway elements 7 are considered to be bridge segments which can be easily transported and stored. Only for the lower area of the ramp are special elements divided into half the width of the lane, but they can also be undivided. These particular elements correspond in Fig.
  • Comfort conditions is a maximum joint width
  • Roadway elements for example, of 40mm possible, which must be matched to the required accuracy for the composition of the elements.
  • the specified value applies to the bridge axis.
  • the transverse direction of the bridge results from the polygonal joining of the bridge elements when the mobile bridge lies in the curve (enlargement on the outside of the curve,
  • chassis for example with a relative angle in the plan of approx. 0.43 °.
  • chassis bogies
  • the mobile bridge according to this invention offers the possibility of repairs in the factory and outside of the operating time
  • the service life (covering, vehicle restraint systems, bearing wear plates for parking the chassis on the road surface) can be inspected at shorter intervals.
  • the components of the mobile bridge according to the invention can be checked visually before and after each use. The tests are carried out in the factory and according to the
  • the mobile bridge according to the invention is designed to carry the road traffic loads and the starting and braking forces generated as a result of road traffic. Furthermore, the mobile bridge according to the invention is designed for the removal of the impact forces generated as a result of the road traffic from the logistics lane and from the opposite lane.
  • the loads and forces are distributed on the support elements 10 and introduced into the subsoil via the road surface.
  • the bearing surfaces and the storage for the operating condition are to be designed in such a way that the road surface is not damaged.
  • the mobile bridge according to the invention is secured against lightning strikes by connecting overvoltages of the mobile bridge to existing ones by means of grounding lines
  • Vehicle restraint systems e.g. guard rails for the
  • the width of the support plates of the support elements can be 1030 mm, for example, which can also correspond to the width of the chassis. Their length in the direction of travel is taking into account the conflicts in the lifting and
  • a full-surface, elastic protective and load-distributing layer can be introduced onto the road surface in order to reduce the stress peaks and the temperatures in the summer months.
  • This elastic mounting can be permanently mounted on an exchangeable wear plate which is attached to the underside of the support plate.
  • the wear plate can be a
  • the mobile bridge according to the invention is a modular one
  • the drive concept, the associated unit units and operating equipment, the chassis and the chassis are coordinated with one another.
  • the wheelbase, the length of the undercarriage, the wheel sizes and the arrangement of the support elements have to be taken into account with regard to the transfer of loads and forces as a result of the
  • Road traffic is alternatively suitable for the full length or for a variable, possibly very short length of the work area below (construction site).
  • FIG. 6 shows a section of a mobile bridge according to the invention, consisting of two portal elements 6 and one connected to the two portal elements 6
  • Roadway element 7 In contrast to the roadway element 7 according to FIG. 2, the roadway element 7 consists of the
  • the embodiment variant according to FIG. 6 consists of three parts, namely a central part 30 and two peripheral parts 31 and 32.
  • a subdivision of the roadway element 7 into the three parts 30 to 32 leads to better handling during transport and during assembly.
  • FIG. 7 shows the section of the mobile bridge according to FIG. 6 in a view from above.
  • the track section 9 on the portal elements 6 and the track element 7 with the central part 30 and the two peripheral parts 31 and 32 can again be seen.
  • Connecting means between the portal elements 6 and the three parts 30 to 32 of the roadway element 7 are provided on the longitudinal axis M of the mobile bridge, connecting elements consisting of pins 34, joint elements 35 and bolts 36. These fasteners are in the
  • the connecting elements arranged on the longitudinal axis M are decisive, which are explained below with reference to FIGS. 8a and 8b: 8a and 8b show the connecting elements in two positions, but both in the closed state, but with different strengths of the connection.
  • a pin 34 which is fixedly connected to the central part 30 via a hinge element 35, engages in a with the portal element 6 or the
  • Track section 9 firmly connected sleeve 38 so far that a bolt 36 displaceable transversely to the pin 34 can pierce the pin 34 at a predetermined bore with the aid of a locking cylinder 37. So that an unintentional loosening of the fixed connection can be prevented, at the end of the bolt 36 a
  • Securing element 33 is fixed, which must first be removed for complete retraction of the bolt 36 with the aid of the locking cylinder 37.
  • the bolt 36 has a cone, with a taper in the direction of the securing element 33 being provided.
  • the bore through the pin 34 is also conical, in such a way that when the bolt 36 is completely pushed in, it jams in the bore of the pin 34 and a rigid connection between the central part 30 and the portal element 6 is created.
  • control cylinders 40 acting on the peripheral parts 31 and 32 also assist in setting a desired curve radius. This means that the mobile
  • the bridge can be driven or shifted after a hydraulic lifting of, for example, 10cm in the longitudinal direction at 0.5km / h, with curve radii of up to 1000m and a gradient of 3% of the road layout being conceivable.
  • the mobile bridge can also be driven transversely at 0.5km / h or. be moved.
  • the portal elements 6 are hydraulically stiffened with the roadway elements 7 with the aid of the control cylinder 40, with a control of the
  • Portal elements 6 as well as in combination with roadway elements 7 - and thus the mobile bridge as a whole - is controlled by means of GPS (Global Positioning System). This means that the mobile bridge or individual portal elements can be moved to a desired position by specifying coordinates without manual intervention by a GPS (Global Positioning System).
  • GPS Global Positioning System
  • Transition area between the portal element 6, respectively. the carriageway section 9 belonging to this and the carriageway element 7 adjoining it with the central part 30 and the peripheral parts 31 and 32 is a water channel below this due to the widening gap when a curve is implemented with the mobile bridge
  • Transition area provided. Water is diverted to the side via this gully, with another channel for good and quick drainage
  • Design variant is provided to extend the lifting cylinder on one side of the bridge so that the
  • Track element 9 respectively. to allow the central part 30 and the peripheral parts 31 and 32 to rest on brackets belonging to the portal elements 6 and coated with an elastomer.
  • the dampening properties of the elastomer coating lead to significantly less noise pollution than when metal comes to rest directly on metal.
  • FIGS. 10a, 10b and 10c the charging of the ramp elements is illustrated with reference to FIGS. 10a, 10b and 10c.
  • lateral support elements are installed, which enable a low-bed trailer to be driven under the ramp elements.
  • the support elements can be removed from the low-bed trailer and they can be transported to a new location. Note signs:

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

L'invention concerne un pont mobile (1) comportant une rampe d'accès (2), une zone de travail (3) dotée de plusieurs éléments de pont (6, 7) et une rampe de sortie (4), la rampe d'accès (2), les éléments de pont (6, 7) et la rampe de sortie (4) pouvant être accouplés et au moins certains des éléments de pont (6, 7) présentant des mécanismes de déplacement (8) qui permettent à un premier composant de déplacement du pont (1) de se déplacer dans la direction de l'axe longitudinal (M) et/ou à un second composant de déplacement du pont (1) de se déplacer transversalement à l'axe longitudinal (M), de manière à placer le pont dans une quelconque position. L'invention concerne en outre un élément portique et un élément chaussée pour le pont mobile.
PCT/EP2020/055485 2019-03-28 2020-03-03 Pont mobile et élément portique, et élément chaussée pour le pont mobile WO2020193084A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PCT/EP2019/057928 WO2020192933A1 (fr) 2019-03-28 2019-03-28 Pont mobile et élément portique, et élément chaussée pour le pont mobile
EPPCT/EP2019/057928 2019-03-28

Publications (1)

Publication Number Publication Date
WO2020193084A1 true WO2020193084A1 (fr) 2020-10-01

Family

ID=66102051

Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/EP2019/057928 WO2020192933A1 (fr) 2019-03-28 2019-03-28 Pont mobile et élément portique, et élément chaussée pour le pont mobile
PCT/EP2020/055485 WO2020193084A1 (fr) 2019-03-28 2020-03-03 Pont mobile et élément portique, et élément chaussée pour le pont mobile

Family Applications Before (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/057928 WO2020192933A1 (fr) 2019-03-28 2019-03-28 Pont mobile et élément portique, et élément chaussée pour le pont mobile

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3811147A (en) * 1971-08-09 1974-05-21 R Dix Mobile roadway repair unit
GB2187776A (en) * 1985-10-09 1987-09-16 Donald Nathaniel Smith Method of and apparatus for repairing roads
US5042957A (en) * 1989-01-27 1991-08-27 Mitsubishi Jukogyo Kabushiki Kaisha Moving type three-dimensional road
US5105494A (en) * 1990-12-03 1992-04-21 Highway Construction Bridge Systems, Inc. Continuously moving highway reconstruction device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3811147A (en) * 1971-08-09 1974-05-21 R Dix Mobile roadway repair unit
GB2187776A (en) * 1985-10-09 1987-09-16 Donald Nathaniel Smith Method of and apparatus for repairing roads
US5042957A (en) * 1989-01-27 1991-08-27 Mitsubishi Jukogyo Kabushiki Kaisha Moving type three-dimensional road
US5105494A (en) * 1990-12-03 1992-04-21 Highway Construction Bridge Systems, Inc. Continuously moving highway reconstruction device

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Publication number Publication date
WO2020192933A1 (fr) 2020-10-01

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