DE102022000549A1 - Method and device for bridge renewal in a short construction time on existing piers - Google Patents

Abstract

The invention relates to a method and a device for the accelerated renewal of supporting structures, in particular bridges made of concrete or other materials with a larger span and one or more supporting pillars. The existing superstructure is preferably dismantled in segments and a new superstructure, preferably made of steel, steel composite or concrete, is created. Existing support pillars are used with the use of devices for the dismantling and assembly of the superstructure. The pillars can continue to be used after the renewal, reinforcement or renewal of the pillars is possible if necessary.

Description

A large number of concrete bridges and supporting structures made of messengers, prestressed concrete, reinforced concrete or similar are no longer sufficiently load-bearing after a service life of typically around 40 years. This applies in particular to bridges for roads, motorways, rail vehicles, etc. In many cases, with comparable construction, replacement requires extensive demolition or blasting and subsequent new construction of the bridge with the corresponding interruption or disruption to the flow of traffic.

• - Feststellung der Erneuerungsbedürftigkeit aufgrund gestiegener Lasten, Korrosion o.ä.
• - Voruntersuchungen
• - Durchführung von Planfeststellungsverfahren und Umweltverträglichkeitsprüfung
• - Ausführungsplanung
• - Vorbereitungen unterhalb der Brücke, insbesondere für den Materialtransport
• - Sperrung der Brücke für den Verkehr
• - Demontage der alten Brücke, durch z.B. Abriss oder Sprengung nach Vorbereitung
• - Neubau der Brücke mittels z.B. Taktschiebeverfahren, Vorschubrüstungen, Freivorbau
• - Verkehrsfreigabe

The state of the art for bridge renewal is described using the example of a motorway bridge made of reinforced concrete or steel with the essential processes of one of the previous processes:

• - Determination of the need for renewal due to increased loads, corrosion or similar.
• - Preliminary investigations
• - Implementation of planning approval procedures and environmental impact assessment
• - Implementation planning
• - Preparations below the bridge, especially for material transport
• - Closure of the bridge to traffic
• - Dismantling of the old bridge, for example by demolition or blasting after preparation
• - New construction of the bridge using, for example, incremental launching methods, launch scaffolding, cantilever construction
• - Traffic clearance

Variants of the method described above are known, e.g. the construction of a new bridge parallel to the traffic line, which is later moved to the old line or to which the traffic line is relocated. However, this is not possible in all topographical conditions.

Temporary bridges are also used, over which traffic is routed while a new bridge is being built. However, this option can only be used if the bridge length and height are limited.

Patent applications to date have dealt more with the construction of new bridges and less with the increasingly necessary renewal of bridges.

The patent specification AT279666B describes a method and a device for the section-by-section production of the individual fields of the superstructure of a bridge connected to the piers. This patent does not involve the dismantling of an existing bridge. The same applies to the patent specification AT273212B .

The patent specification AT279666B describes a method for rehabilitating a bridge, but the focus here is on strengthening the structure. However, this is out of the question for a bridge with significant corrosion damage.

The patent specification RU2002124421A describes a method for the renewal of old, historically valuable bridges. The proposal is to build a new bridge above the old bridge. However, this is not applicable to heavy-duty longer bridge structures.

The patent specification EP3541562 , EP3541563 and EP3541564 : "Method and device for the production of a continuous strip-shaped composite material" describes the production of composite material from different - also corrosion-resistant - steels. However, the patent specifications only show general applications.

Renewing a bridge in the same place generally takes years. During this time, the bridge is not available for use. In addition, there are times for planning, planning approval, approval of the building and preparation times for the construction work.

In the immediate vicinity of the bridge, significant environmental pollution is caused by the necessary construction site equipment and access roads.

A bridge made of concrete usually only has a service life of 40 years. A bridge renewed in concrete would only have a relatively limited useful life, whereas the advantageous execution of the superstructure in steel, steel composite or corrosion-resistant composite steel means that a significantly longer useful life can be expected.

Disadvantages in terms of costs and the environment exist with the necessary disposal of the concrete material produced during the demolition of the bridge, which has not yet been put to any new use and must be disposed of.

A bridge renewed by the method of this invention is called "Thomas Bridge".

3. Advantages of the invention:

The invention describes a method and a device for the rapid replacement of the superstructure of a bridge, particularly suitable for high loaded bridges of great length and one or more buttresses. The pillars can be upgraded at different times before, during and/or after the completion of the new superstructure.

The essential feature is the minimization of the time in which the bridge to be renewed cannot be used. The sum of the measures will also result in a cost advantage, even if there are increased costs in some areas.

In an advantageous development of the invention, the service life of the supporting structure and pillars of the renewed bridge can be significantly increased by using steel compared to concrete.

In an advantageous development of the invention, corrosion-resistant composite steel can be used for the supporting structure and pillars of the renewed bridge, which means that the renewed bridge can be expected to have a significantly longer service life.

In an advantageous development of the invention, parts of the dismantled bridge can also be recycled.

• • Die Bauzeit für eine Erneuerung einer Brücke wird deutlich verkürzt.
• • Die Zeit für die Planung der neuen Brücke wird reduziert.
• • Kann die Planung der neuen Brücke zumindest in Teilen auf Basis der bisherigen Planunterlagen erfolgen, wird die Zeit für die Planung weiter reduziert.
• • Die Umweltbelastung wird reduziert durch geringere Eingriffe in die Umgebung, insbesondere für die Baustellenvorbereitung unterhalb des Brückenbauwerks und die dafür notwendige Infrastruktur.
• • Der Flächenbedarf am Grund für Baustelle und Zufahrten wird deutlich verringert.
• • Planfeststellungsverfahren werden weniger umfangreich und damit auch zeitlich kürzer.
• • Eine Kostenreduzierung wird für u.a. bei Planung, Baustellenaufwand und verkürzte Bauzeit erreicht.
• • Die Nutzungsdauer der neuen Brücke kann durch die Verwendung korrosionsfester Materialien gegenüber einer Betonbrücke wesentlich verlängert werden.
• • Eine Weiterverwendung von Segmenten von alten Betonüberbauten ist ermöglich, damit werden die Kosten für die Entsorgung des Betons reduziert und es können neue Bauten in kurzer Bauzeit errichtet werden.
• • Dieses Recycling von Segmenten hat neben den eigentlichen Vorteilen den Vorteil einer positiven Ausstrahlung unter Umweltgesichtspunkten und wird zunehmend Bedeutung erlangen.
• • Dem nachvollziehbarem Unmut der Bürger bei einer notwendigen Verkehrseinschränkung oder Brückensperrung insbesondere in Hauptverkehrsadern wird begegnet.

Below is a summary of the benefits of the new process:

• • The construction time for replacing a bridge is significantly reduced.
• • The time for planning the new bridge is reduced.
• • If the new bridge can be planned at least in part on the basis of the previous planning documents, the planning time will be further reduced.
• • The environmental impact is reduced due to fewer interventions in the environment, especially for the construction site preparation below the bridge structure and the infrastructure required for this.
• • The space requirement on the ground for the construction site and driveways is significantly reduced.
• • Planning approval procedures are becoming less extensive and therefore shorter in time.
• • A reduction in costs is achieved for, among other things, planning, construction site costs and reduced construction time.
• • The service life of the new bridge can be significantly extended compared to a concrete bridge by using corrosion-resistant materials.
• • It is possible to continue using segments from old concrete superstructures, which reduces the costs for disposing of the concrete and allows new buildings to be erected in a short construction time.
• • In addition to the actual advantages, this recycling of segments has the advantage of a positive impact from an environmental point of view and will become increasingly important.
• • The understandable resentment of the citizens in the case of necessary traffic restrictions or bridge closures, especially in main traffic arteries, is countered.

character list

• 1 Der Wechsel des Überbaus (1a) einer Brücke gegen einen neuen Überbau (1b) aus Stahl oder Stahlverbund erfolgt unter Nutzung der vorhandenen Stützpfeiler (2) für Demontage und Montage.
• 2 Die Widerlager am Brückenkopf (3) und/oder die Brückenpfeiler (2) werden genutzt zum Einsatz einer Vorrichtung (4) für die Demontage des alten Überbaus (1a). Es wird vorzugsweise in der Nähe der Auflagelager eine Vorrichtung aufgesetzt, die für die Demontage Teile oder Segmente des Überbaus (5a) herausnehmen und zum Abtransport bereitstellen kann. Die Segmente (5a) können z.B. durch Sägen, thermische Trennverfahren oder Wasserstrahlschneiden in verschiedenen Richtungen bezogen auf den Fahrrichtung erstellt werden.
• 3 Die Widerlager am Brückenkopf (3) und/oder die Brückenpfeiler (2) werden genutzt zum Einsatz einer Vorrichtung (6) für die Montage des neuen Überbaus (1b). Es wird vorzugsweise in der Nähe der Auflagepunkte eine Vorrichtung (6) aufgesetzt, die für die Montage Teile des neuen Überbaus (5b) aufnehmen und in eine Montageposition oder endgültige Lage einsetzen. Beim zeitlich gleichzeitigen Einsatz der Demontagevorrichtung (4) und der Montagevorrichtung (6) wird die Bauzeit wesentlich verkürzt.
• 4 Die Brückenauflagen (3) und/oder Brückenpfeiler (2) werden genutzt zum Einsatz einer kombinierten Vorrichtung (7) für die Demontage und Montage der Tragkonstruktion (13).
• 5 Der neue Überbau (1b) aus Stahl wird vollständig oder in Segmenten (5b) vorgefertigt, die vor Ort verbunden werden, z.B. durch Keile, Seile, Spannelemente, Schrauben und/oder Schweißen. Der für den Überbau (1b) verwendete Stahl kann ein für Brückenbau geeigneter Stahl und/oder Verbundstahl sein. Dieser verfügbare Verbundstahl ist ein Stahl-Verbund aus einer korrosionsbeständigen Oberflächenschicht und tragendem, kostengünstigerem Stahl. Für die kostengünstige Herstellung des einzusetzenden Verbundstahles kann das Verfahren nach z.B. Patent EP 3541562 : „Verfahren und Vorrichtung zur Herstellung eines kontinuierlichen bandförmigen Verbundmaterials“ eingesetzt werden. Ein Vorteil bei Einsatz von einer Stahlkonstruktion für den neuen Überbau (1b) ist das geringere Gewicht gegenüber einer Betonkonstruktion, damit werden vergleichsweise höhere Verkehrslasten möglich. Der neue Überbau (1b) kann auch als Verbundmaterial aus Stahl mit Beton, Faserbeton, Kunststoff oder weiterem erstellt werden. Dieser Verbund kann auch erst vor Ort durch z.B. Betonieren eines Obergurtes hergestellt werden. Der neue Überbau (1b) kann auch teilweise oder vollständig in Beton oder Betonsegmenten ausgeführt werden. Der neue Überbau (1b) kann auch als Schalung für eine Ausführung als Beton- oder Betonverbundbrücke verwendet werden und auch später wieder entfernt werden.
• 6 Die Widerlager am Brückenkopf (3) oder Brückenpfeiler (2) können erforderlichenfalls zeitlich vorher, parallel oder nachfolgend zur Brückenerneuerung temporär oder dauerhaft für höhere Lasten verstärkt werden. Dies erfolgt z.B. durch neue Auflagelager mit höherer Tragfähigkeit, Verstärkung des Unterbaus und der vorhandenen Pfeiler mit z.B. Beton und/oder Stahl oder Gerüsten. Bei geeigneter Auslegung des neues Tagwerkes (1 b) können die alten Stützpfeiler (2a) zeitlich parallel oder nachfolgend gegen neue Stützpfeiler (2b) ausgetauscht werden. Dazu können die neuen Stützpfeiler (2b) z.B. neben und/oder zwischen den alten erstellt werden.
• 7, 8, 9 Vorgeschlagen wird weiterhin anstelle der weitgehenden Entsorgung des alten Überbaus einer Betonbrücke ein Verfahren zur Wiederverwendung von Segmenten des alten Überbaus für z.B. Unterführungen, Brücken oder Gebäude. Besonders geeignet sind dazu die häufig als Hohlkasten ausgebildeten Tragkonstruktionen. Die Segmente des alten Überbaus können bei der Brückenneuerung entsprechend der späteren Nutzung geeignet ausgeschnitten werden. Weitere Anpassungen können später erfolgen. Die freiliegende Stahlbewehrung der Segmente wird entfernt oder versiegelt, mit z.B. einen Putzauftrag oder Anstrich. Nachträglich werden Versorgungsleitungen, Dämmung usw. eingebracht. Anwendungsfälle sind insbesondere für Segmente in Hohlkastenform gegeben. Sie können je nach Größe für die Überbrückung von Bachläufen, Fußgängerwegen, Bahngleisen, Wildwechsel etc. eingesetzt werden. Je nach Notwendigkeit können ein einzelnes Segment (7) oder mehrere, nebeneinander angeordnete Segmente (8) wiederverwendet werden. Aufgrund der massiven Ausführung des Hohlkastenprofiles ist eine hohe Belastungsfähigkeit gegeben. Die Segmente in Hohlkastenform können für Tiny-Massivhäuser verwendet werden, beispielhafte Ausführungen zeigt 9.

The proposed method is described below with reference to figures.

• 1 The superstructure (1a) of a bridge is replaced with a new superstructure (1b) made of steel or steel composite using the existing piers (2) for dismantling and assembly.
• 2 The abutments on the bridgehead (3) and/or the bridge piers (2) are used to insert a device (4) for dismantling the old superstructure (1a). A device is preferably set up near the support bearing, which can remove parts or segments of the superstructure (5a) for dismantling and prepare them for transport. The segments (5a) can be created in different directions relative to the direction of travel, for example by sawing, thermal cutting processes or water jet cutting.
• 3 The abutments on the bridgehead (3) and/or the bridge piers (2) are used to insert a device (6) for the assembly of the new superstructure (1b). A device (6) is preferably placed near the support points, which takes up parts of the new superstructure (5b) for assembly and inserts them into an assembly position or final position. If the disassembly device (4) and the assembly device (6) are used at the same time, the construction time is significantly reduced.
• 4 The bridge supports (3) and/or bridge pillars (2) are used to use a combined device (7) for the disassembly and assembly of the supporting structure (13).
• 5 The new steel superstructure (1b) is prefabricated in its entirety or in segments (5b) which are connected on site, for example by wedges, cables, tensioning elements, bolts and/or welding. The steel used for the superstructure (1b) can be a steel suitable for bridge construction and/or composite steel. This available composite steel is a composite steel made of a corrosion resistant surface layer and load bearing, lower cost steel. For the cost-effective production of the composite steel to be used, the method can, for example, patent EP3541562 : "Method and device for the production of a continuous strip-shaped composite material". An advantage of using a steel construction for the new superstructure (1b) is the lower weight compared to a concrete construction, which means that comparatively higher traffic loads are possible. The new superstructure (1b) can also be created as a composite material made of steel with concrete, fiber concrete, plastic or something else. This bond can also be created on site, for example by concreting an upper chord. The new superstructure (1b) can also be partially or fully executed in concrete or concrete segments. The new superstructure (1b) can also be used as formwork for a concrete or composite concrete bridge design and can also be removed later.
• 6 If necessary, the abutments on the bridgehead (3) or bridge piers (2) can be reinforced temporarily or permanently for higher loads before, parallel to or after the bridge renewal. This is done, for example, by new supports with higher load-bearing capacity, reinforcement of the substructure and the existing pillars with, for example, concrete and/or steel or scaffolding. With a suitable design of the new day structure (1b), the old pillars (2a) can be exchanged for new pillars (2b) at the same time or subsequently. For this purpose, the new pillars (2b) can be created, for example, next to and/or between the old ones.
• 7 , 8th , 9 Furthermore, instead of largely disposing of the old superstructure of a concrete bridge, a method for reusing segments of the old superstructure for, for example, underpasses, bridges or buildings is proposed. The supporting structures, which are often designed as hollow boxes, are particularly suitable for this purpose. When renovating the bridge, the segments of the old superstructure can be cut out appropriately for later use. Further adjustments can be made later. The exposed steel reinforcement of the segments is removed or sealed, eg with plaster or paint. Supply lines, insulation, etc. are subsequently installed. Applications are given in particular for segments in the form of hollow boxes. Depending on their size, they can be used to bridge streams, pedestrian paths, railway tracks, deer crossings, etc. Depending on the need, a single segment ( 7 ) or several segments arranged next to each other ( 8th ) can be reused. Due to the solid design of the hollow box profile, there is a high load capacity. The segments in the form of hollow boxes can be used for tiny solid houses, as shown by example 9 .

Reference List

1a

old superstructure

1b

New superstructure

2

buttress

2a

Old buttresses

2 B

New support pillars

3

bridgehead

4

dismantling device

5a

old segment

5b

new segment

6

assembly device

7

assembly device

8th

Directions for arrival and departure

30

segment

31

upper belt

32

creek, roadway etc.

33

roadway

34

New outer wall

35

terrace

36

New partitions

37

hollow box segment

4. Explanation of the figures:

• 1 Der Wechsel des Überbaus (1a) einer Brücke gegen einen neuen Überbau (1 b) aus Stahl oder Stahlverbund erfolgt unter Nutzung der vorhandenen Stützpfeiler (2) für Demontage und Montage.
• 2 Die Widerlager am Brückenkopf (3) und/oder die Brückenpfeiler (2) werden genutzt zum Einsatz einer Vorrichtung (4) für die Demontage des alten Überbaus (1a). Es wird vorzugsweise in der Nähe der Auflagelager eine Vorrichtung aufgesetzt, die für die Demontage Teile oder Segmente des Überbaus (5a) herausnehmen und zum Abtransport bereitstellen kann. Die Segmente (5a) können z.B. durch Sägen, thermische Trennverfahren oder Wasserstrahlschneiden in verschiedenen Richtungen bezogen auf den Fahrrichtung erstellt werden.
• 3 Die Widerlager am Brückenkopf (3) und/oder die Brückenpfeiler (2) werden genutzt zum Einsatz einer Vorrichtung (6) für die Montage des neuen Überbaus (1b). Es wird vorzugsweise in der Nähe der Auflagepunkte eine Vorrichtung (6) aufgesetzt, die für die Montage Teile des neuen Überbaus (5b) aufnehmen und in eine Montageposition oder endgültige Lage einsetzen. Beim zeitlich gleichzeitigen Einsatz der Demontagevorrichtung (4) und der Montagevorrichtung (6) wird die Bauzeit wesentlich verkürzt.
• 4 Die Brückenauflagen (3) und/oder Brückenpfeiler (2) werden genutzt zum Einsatz einer kombinierten Vorrichtung (7) für die Demontage und Montage der Tragkonstruktion (13).

The proposed method is described below with reference to figures.

• 1 The superstructure (1a) of a bridge is replaced with a new superstructure (1b) made of steel or steel composite using the existing pillars (2) for disassembly and assembly.
• 2 The abutments on the bridgehead (3) and / or the bridge pier (2) are used to use a device (4) for Dismantling of the old superstructure (1a). A device is preferably set up near the support bearing, which can remove parts or segments of the superstructure (5a) for dismantling and prepare them for transport. The segments (5a) can be created in different directions relative to the direction of travel, for example by sawing, thermal cutting processes or water jet cutting.
• 3 The abutments on the bridgehead (3) and/or the bridge piers (2) are used to insert a device (6) for the assembly of the new superstructure (1b). A device (6) is preferably placed near the support points, which takes up parts of the new superstructure (5b) for assembly and inserts them into an assembly position or final position. If the disassembly device (4) and the assembly device (6) are used at the same time, the construction time is significantly reduced.
• 4 The bridge supports (3) and/or bridge pillars (2) are used to use a combined device (7) for the disassembly and assembly of the supporting structure (13).

Figure 1 - 4

The new steel superstructure (1b) is prefabricated in whole or in segments (5b) which are connected on site, e.g. by wedges, cables, tensioning elements, bolts and/or welding.

The steel used for the superstructure (1b) can be a steel suitable for bridge construction and/or composite steel. This available composite steel is a composite steel made of a corrosion resistant surface layer and load bearing, lower cost steel.

For the cost-effective production of the composite steel to be used, the method can, for example, patent EP3541562 : "Method and device for the production of a continuous strip-shaped composite material".

An advantage of using a steel construction for the new superstructure (1b) is the lower weight compared to a concrete construction, which means that comparatively higher traffic loads are possible.

The new superstructure (1b) can also be created as a composite material made of steel with concrete, fiber concrete, plastic or something else. This bond can also be created on site, e.g. by concreting an upper chord.

The new superstructure (1b) can also be partially or fully executed in concrete or concrete segments.

The new superstructure (1b) can also be used as formwork for a concrete or composite concrete bridge design and can also be removed later.

Figure 5 and 6

If necessary, the abutments on the bridgehead (3) or bridge piers (2) can be reinforced temporarily or permanently for higher loads before, parallel to or after the bridge renewal.

This is done, for example, by installing new supports with a higher load-bearing capacity, strengthening the substructure and the existing pillars with e.g. concrete and/or steel or scaffolding.

With a suitable design of the new day structure (1b), the old pillars (2a) can be exchanged for new pillars (2b) at the same time or subsequently. To do this, the new support pillars (2b) can be created next to and/or between the old ones, for example.

Figures 7, 8, 9

Furthermore, instead of largely disposing of the old superstructure of a concrete bridge, a method for reusing segments of the old superstructure for e.g. underpasses, bridges or buildings is proposed. The supporting structures, which are often designed as hollow boxes, are particularly suitable for this purpose.

When renovating the bridge, the segments of the old superstructure can be cut out appropriately for later use. Further adjustments can be made later.

The exposed steel reinforcement of the segments is removed or sealed with e.g. plaster or paint.

Supply lines, insulation, etc. are subsequently installed.

Applications are given in particular for segments in the form of hollow boxes. Depending on their size, they can be used to bridge streams, pedestrian paths, railway tracks, deer crossings, etc. Depending on the need, a single segment ( 7 ) or several segments arranged next to each other ( 8th ) can be reused. Due to the massive execution The hollow box profile provides a high load-bearing capacity.

The segments in the form of hollow boxes can be used for tiny solid houses, as shown by example 9 .

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• AT 279666 B [0006, 0007]
• AT 273212 B [0006]
• RU 2002124421A [0008]
• EP 3541562 [0009, 0021, 0025]
• EP 3541563 [0009]
• EP 3541564 [0009]

Claims (10)

Method for replacing the superstructure (1a) of a bridge (10) with a new superstructure (1b) using existing options for resting on the bridgeheads (3) and piers (2) for the dismantling and assembly of the superstructure. procedure after claim 1 , characterized in that the supports on the bridgeheads (3) and piers (2) are used to accommodate one or more devices (4) for the dismantling of the old superstructure (1a) (11) and one or more devices (6) for the assembly of the new superstructure (1b) (12) or one or more combined devices (7) (13) for dismantling and assembly of the superstructure. Method according to the preceding claims, characterized in that dismantling of the old superstructure and assembly of the new superstructure take place at the same time by simultaneous use of the dismantling device (4) and the assembly device (6) (12) or by using a combined device (7) for the dismantling and assembly of the superstructure. Method according to the preceding claims, characterized in that the dismantling of the old superstructure takes place in parts or segments (5a) which are removed and made available for transport and/or the assembly of the new superstructure takes place in parts or segments (5b) which are received and are used in an assembly position or final position and are thereby connected. The segments (5a) of the old superstructure can be created in different directions based on the direction of travel, for example by sawing, thermal cutting processes or water jet cutting. The segments (5b) of the new superstructure can be connected on site, eg by wedges, cables, tensioning elements, bolts and/or welding. Method according to the preceding claims, characterized in that the new superstructure (1b) is a largely complete construction or a construction prefabricated in segments (5b) made of steel, corrosion-resistant composite steel or composite material made of steel with, for example, concrete, fiber concrete, plastic or a combination of the above materials . This bond can also be created after installation on site, for example by concreting an upper chord, or by using the new superstructure as formwork for a design as a concrete or composite concrete bridge and later as a load-bearing element or remain in place or be removed. Method according to the preceding claims, characterized in that , in order to increase the load-bearing capacity, the support bearings on the bridgehead (3) and/or supporting pillars (2) are reinforced temporarily or permanently beforehand, in parallel or subsequently, e.g. by means of support bearings with a higher load-bearing capacity and by strengthening the substructure and the existing buttresses with eg concrete and/or steel and by the addition of temporary or permanent further scaffolding or buttresses also created alongside and/or between the old buttresses. procedure after claim 4 , characterized in that instead of completely disposing of the old superstructure of a concrete bridge, parts or segments (5a) are reused, for example for underpasses, bridges or buildings, the parts or segments of the old superstructure can be cut out appropriately for later use during and after dismantling . procedure after claim 5 , characterized in that for the cost-effective production of the corrosion-resistant composite steel, the method according to eg patent EP 3541562: "Method and device for the production of a continuous strip-shaped composite material" is used. Device for dismantling an old superstructure (1a) of a bridge in parts or segments. This device is placed on the bridgeheads (3) and/or pillars (2) and enables parts or segments of a bridge to be removed. device after claim 9 , characterized in that the device can be used for assembling a new superstructure (1a) of a bridge in parts or segments and for dismantling an old superstructure (1a) of a bridge in parts or segments, the device being used both for dismantling and for assembly or can be used for simultaneous disassembly and assembly.

Images