EP0629743A1 - Method for compensating subsidence of a longitudinal fixed railway track foundation - Google Patents

Method for compensating subsidence of a longitudinal fixed railway track foundation Download PDF

Info

Publication number
EP0629743A1
EP0629743A1 EP94108666A EP94108666A EP0629743A1 EP 0629743 A1 EP0629743 A1 EP 0629743A1 EP 94108666 A EP94108666 A EP 94108666A EP 94108666 A EP94108666 A EP 94108666A EP 0629743 A1 EP0629743 A1 EP 0629743A1
Authority
EP
European Patent Office
Prior art keywords
concrete
installation
subsidence
injection material
concrete slab
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.)
Withdrawn
Application number
EP94108666A
Other languages
German (de)
French (fr)
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.)
Ed Zueblin AG
Original Assignee
Ed Zueblin 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 Ed Zueblin AG filed Critical Ed Zueblin AG
Publication of EP0629743A1 publication Critical patent/EP0629743A1/en
Withdrawn legal-status Critical Current

Links

Images

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
    • E01C23/10—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 raising or levelling sunken paving; for filling voids under paving; for introducing material into substructure
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B1/00—Ballastway; Other means for supporting the sleepers or the track; Drainage of the ballastway
    • E01B1/002—Ballastless track, e.g. concrete slab trackway, or with asphalt layers
    • E01B1/004—Ballastless track, e.g. concrete slab trackway, or with asphalt layers with prefabricated elements embedded in fresh concrete or asphalt
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D37/00—Repair of damaged foundations or foundation structures
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2204/00—Characteristics of the track and its foundations
    • E01B2204/03—Injecting, mixing or spraying additives into or onto ballast or underground
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2204/00—Characteristics of the track and its foundations
    • E01B2204/06—Height or lateral adjustment means or positioning means for slabs, sleepers or rails
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2204/00—Characteristics of the track and its foundations
    • E01B2204/10—Making longitudinal or transverse sleepers or slabs in situ or embedding them

Definitions

  • the method according to the invention provides a possibility of targeted injection into the subsurface.
  • pipes or rectangular tubes are already used in the manufacturing phase Hollow plastic or metal profiles laid between the floor and the concrete slab. This precautionary installation makes it possible to counteract a possible lowering of the subsoil in a simple manner. It is not always necessary to lift the concrete belt. In many renovation cases, pressing the resulting cavity alone will suffice.
  • Fig. 2 top view of a roadway
  • FIG. 1 shows the schematic structure of a concrete substructure for rail vehicles.
  • the subsurface (1) is leveled and compacted in the usual way.
  • a film (2) is applied to this substrate. It is used as a sealing surface layer during subsequent pressing. As a result, the grout must be distributed horizontally and not only penetrate vertically into the ground via cracks in the floor.
  • the concrete track (4) is produced on the film, into which the sleepers (6) are shaken in the not yet hardened state.
  • the vertical connector (7) of the installed plastic pipe can be seen between the sleepers.
  • the grouting openings (8) lying in the plane of the concrete carriageway surface must be closed during the manufacture of the solid carriageway in order to avoid filling with concrete.
  • the length of the individual hose sections and the distance between the compression openings depends on the expected compression volume.
  • the filling openings (8) with the entire pipe laid can be outside or inside the rail track (5).
  • Fig. 3 shows in a section perpendicular to the threshold (6) again the structure of the subgrade (1), film (2) and concrete slab (7).
  • the vertical riser pipe (7) ends in the filling opening (8).
  • Fig. 4 shows the special design of the plastic hose, which allows extensive, multiple pressing of material.
  • the hose is provided with a lip (11) which has a small outlet opening (12). If the substrate (1) sinks with the film (2), a gap (9) is created. The injection material (10) is pressed into the gap via the outlet opening; The hose can be rinsed after pressing. If residues of the grouting material are still in the lip (11) and harden, the thin lip can be easily blasted off the next time the grouting is carried out.
  • Another embodiment uses a conventional cuff hose instead of the compression hose with lip, which is also integrated into the concrete slab. With this arrangement it is also possible to press in a targeted manner at the individual pressing openings and to protect the hose from clogging by rinsing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Architecture (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Road Paving Structures (AREA)

Abstract

Seit einigen Jahren haben sich im Eisenbahnoberbau Betonfahrbahnen bewährt. Im Betrieb solcher Fahrbahnen ergibt sich das Problem, daß sich der Untergrund unter der Fahrbahn setzen kann. Einer solchen Setzung folgt die Betonplatte und es kommt zu einer Abweichung von der planmäßigen Schienenlage. Das erfindungsgemäße Verfahren sieht eine Möglichkeit der gezielten Injektion in den Untergrund vor. Dazu werden schon in der Herstellungsphase Rohre (7) oder rechteckige Hohlprofile aus Kunststoff oder Metall zwischen Boden und Betonplatte verlegt. <IMAGE>Concrete carriageways have proven their worth in railway superstructures for several years. In the operation of such lanes, there is the problem that the ground can settle under the lane. Such a settlement follows the concrete slab and there is a deviation from the planned rail position. The method according to the invention provides a possibility of targeted injection into the underground. For this purpose, pipes (7) or rectangular hollow profiles made of plastic or metal are laid between the floor and the concrete slab during the manufacturing phase. <IMAGE>

Description

Seit einigen Jahren haben sich im Eisenbahnoberbau Betonfahrbahnen bewährt. Bei diesen Betonfahrbahnen, wie in der DE 38 40 795 beschrieben, handelt es sich um eine endlos verlegte Betonplatte, in der die Schwellen fest eingebunden sind.Concrete carriageways have proven their worth in railway superstructures for several years. These concrete carriageways, as described in DE 38 40 795, are an endlessly laid concrete slab in which the sleepers are firmly integrated.

Im Betrieb solcher Fahrbahnen ergibt sich das Problem, daß sich der Untergrund unter der Fahrbahn setzen kann. Einer solchen Setzung folgt die Betonplatte und es kommt zu einer Abweichung von der planmäßigen Schienenlage.In the operation of such lanes, there is the problem that the ground can settle under the lane. Such a settlement follows the concrete slab and there is a deviation from the planned rail position.

Bisher war es üblich, die Betonplatte der festen Fahrbahn anzuheben und Injektionsmaterial über eine Injektionslanze in den durch das Anheben entstandenen Hohlraum einzubringen. Diese Form der Injektion verläuft nicht sehr zielgerichtet, da sie punktförmig aus der Injektionslanze austritt. Besser ist es dagegen, das Injektionsmaterial gezielt und im geeigneten Umfang an den Ort der Bodenabsenkung zu bringen.So far, it has been customary to lift the concrete slab of the solid carriageway and to introduce injection material into the cavity created by the lifting via an injection lance. This form of injection is not very targeted because it emerges from the injection lance in a punctiform manner. On the other hand, it is better to bring the injection material to the place of the subsidence in a targeted and appropriate amount.

Das erfindungsgemäße Verfahren sieht von vornherein eine Möglichkeit der gezielten Injektion in den Untergrund vor. Dazu werden schon in der Herstellungsphase Rohre oder rechteckige Hohlprofile aus Kunststoff oder Metall zwischen Boden und Betonplatte verlegt. Durch diesen vorsorglichen Einbau ist es auf einfache Weise möglich einer eventuellen Absenkung des Untergrundes entgegenzuwirken. Dabei ist es auch nicht immer notwendig das Betonband anzuheben. In vielen Sanierungsfällen wird ein Verpressen des entstandenen Hohlraums allein schon genügen.From the outset, the method according to the invention provides a possibility of targeted injection into the subsurface. To do this, pipes or rectangular tubes are already used in the manufacturing phase Hollow plastic or metal profiles laid between the floor and the concrete slab. This precautionary installation makes it possible to counteract a possible lowering of the subsoil in a simple manner. It is not always necessary to lift the concrete belt. In many renovation cases, pressing the resulting cavity alone will suffice.

Fig. 1 Schnitt durch eine endlose BetonfahrbahnFig. 1 section through an endless concrete road

Fig. 2 Draufsicht auf eine FahrbahnFig. 2 top view of a roadway

Fig. 3 Schnitt A-AFig. 3 section A-A

Fig. 4 Schnitt B-BFig. 4 section B-B

In Fig. 1 erkennt man den schematischen Aufbau eines Betonunterbaus für Schienenfahrzeuge. Der Untergrund (1) wird auf die übliche Art planiert und verdichtet. Auf diesen Untergrund wird eine Folie (2) aufgebracht. Sie dient bei einer späteren Verpressung als dichtende Oberflächenschicht. Dadurch muß sich das Verpreßgut in der Horizontalen verteilen und dringt nicht nur über Bodenrisse vertikal in den Untergrund ein.1 shows the schematic structure of a concrete substructure for rail vehicles. The subsurface (1) is leveled and compacted in the usual way. A film (2) is applied to this substrate. It is used as a sealing surface layer during subsequent pressing. As a result, the grout must be distributed horizontally and not only penetrate vertically into the ground via cracks in the floor.

Auf der Folie wird die Betonfahrbahn (4) hergestellt, in die im noch nicht ausgehärteten Zustand die Schwellen (6) eingerüttelt werden. Jeweils zwischen den Schwellen ist das vertikale Anschlußstück (7) des eingebauten Kunststoffrohres zu sehen. Die in der Ebene der Betonfahrbahnoberfläche liegenden Verpreßöffnungen (8) müssen bei der Herstellung der festen Fahrbahn verschlossen sein, um ein Verfüllen mit Beton zu vermeiden. Die Länge der einzelnen Schlauchabschnitte und dnamit der Abstand der Verpreßöffnungen hängt dabei vom zu erwartenden Verpreßumfang ab.The concrete track (4) is produced on the film, into which the sleepers (6) are shaken in the not yet hardened state. The vertical connector (7) of the installed plastic pipe can be seen between the sleepers. The grouting openings (8) lying in the plane of the concrete carriageway surface must be closed during the manufacture of the solid carriageway in order to avoid filling with concrete. The length of the individual hose sections and the distance between the compression openings depends on the expected compression volume.

Die Einfüllöffnungen (8) mit dem gesamten verlegten Rohr können dabei außerhalb oder innerhalb des Schienenstranges (5) liegen.The filling openings (8) with the entire pipe laid can be outside or inside the rail track (5).

Fig. 3 zeigt in einem Schnitt senkrecht zur Schwelle (6) nochmals den Aufbau aus Planum (1), Folie (2) und Betonplatte (7). Das vertikale Steigrohr (7) endet in der Einfüllöffnung (8).Fig. 3 shows in a section perpendicular to the threshold (6) again the structure of the subgrade (1), film (2) and concrete slab (7). The vertical riser pipe (7) ends in the filling opening (8).

Das Detail in Fig. 4 zeigt die besondere Ausbildung des Kunststoffschlauches, der eine flächenhafte, mehrfache Verpressung von Material erlaubt. Der Schlauch ist mit einer Lippe (11) versehen, die eine kleine Austrittsöffnung (12) aufweist. Sinkt der Untergrund (1) mit der Folie (2) ab, entsteht ein Spalt (9). Über die Austrittsöffnung wird das Injektionsgut (10) in den Spalt verpresst; Nach der Verpressung kann der Schlauch gespült werden. Sitzen noch Reste des Verpressmaterial in der Lippe (11) und härten aus, kann die dünne Lippe beim nächsten Verpressen leicht abgesprengt werden.The detail in Fig. 4 shows the special design of the plastic hose, which allows extensive, multiple pressing of material. The hose is provided with a lip (11) which has a small outlet opening (12). If the substrate (1) sinks with the film (2), a gap (9) is created. The injection material (10) is pressed into the gap via the outlet opening; The hose can be rinsed after pressing. If residues of the grouting material are still in the lip (11) and harden, the thin lip can be easily blasted off the next time the grouting is carried out.

Eine andere Ausführungsform verwendet statt des Verpreßschlauches mit Lippe einen konventionellen Manschettenschlauch, der ebenfalls in die Betonplatte integriert wird. Auch bei dieser Anordnung ist es möglich, gezielt an den einzelnen Verpreßöffnungen zu verpressen und den Schlauch durch Spülen vor dem Zusetzen zu schützen.Another embodiment uses a conventional cuff hose instead of the compression hose with lip, which is also integrated into the concrete slab. With this arrangement it is also possible to press in a targeted manner at the individual pressing openings and to protect the hose from clogging by rinsing.

Wichtig ist dabei die geeignete Anordnung der Verpressöffnungen im Verlauf der Betonfahrbahn, da hier lediglich eine punktuelle Verpressung möglich ist.What is important here is the suitable arrangement of the pressing openings in the course of the concrete carriageway, since only a selective pressing is possible here.

Claims (8)

Verfahren zur wiederholten Anpassung einer Betonfahrbahn an Absenkungen des Untergrunds durch Verpressen von Injektionsmaterial in den Untergrund gekennzeichnet durch den horizontalen Einbau von Hohlprofilen parallel zum Schienenstrang mit Öffnungen zur Verteilung des Injektionsmaterials zwischen Betonplatte (4) und Untergrund (1)
und den Anschluß an vertikale Hohlprofile (7) und Verpreßöffnungen (8).Process for repeated adaptation of a concrete carriageway to subsidence of the subsurface by pressing injection material into the subsurface characterized by the horizontal installation of hollow profiles parallel to the rail track with openings for distributing the injection material between the concrete slab (4) and the subsurface (1)
and the connection to vertical hollow profiles (7) and compression openings (8). Verfahren nach Anspruch 1 gekennzeichnet durch die Verwendung von Rohren, die im horizontalen Bereich eine lippenförmige Ausbildung (11) aufweisen.A method according to claim 1, characterized by the use of tubes which have a lip-shaped configuration (11) in the horizontal region. Verfahren nach Anspruch 1 gekennzeichnet durch die Verwendung von Manschettenrohren zur Verteilung des Injektionsguts.A method according to claim 1, characterized by the use of cuff tubes for distributing the injection material. Verfahren nach Anspruch 1 gekennzeichnet durch die Verwendung von Rechteckhohlprofilen mit Öffnungen zur Verteilung des Injektionsguts.A method according to claim 1, characterized by the use of rectangular hollow profiles with openings for distributing the injection material. Verfahren nach Anspruch 1 bis 4 gekennzeichnet durch das Einbauen von einem oder mehreren Verpreßrohren parallel zu Betonfahrbahn.Method according to Claims 1 to 4, characterized by the installation of one or more grouting pipes parallel to the concrete carriageway. Verfahren nach Anspruch 1 bis 5 gekennzeichnet durch den Einbau der Rohre inner- oder außerhalb des Schienenstrangs.Method according to claims 1 to 5, characterized by the installation of the tubes inside or outside the rail track. Verfahren nach Anspruch 1 bis 6 gekennzeichnet durch den Einbau von einzelnen Abschnitten mit beliebiger Länge.Method according to Claims 1 to 6, characterized by the installation of individual sections of any length. Verfahren nach Anspruch 1 bis 7 gekennzeichnet durch den Einbau einer Kunststofffolie zwischen Untergrund (1) und Betonplatte (4).Method according to Claims 1 to 7, characterized by the installation of a plastic film between the substrate (1) and the concrete slab (4).
EP94108666A 1993-06-11 1994-06-07 Method for compensating subsidence of a longitudinal fixed railway track foundation Withdrawn EP0629743A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4319470 1993-06-11
DE19934319470 DE4319470C1 (en) 1993-06-11 1993-06-11 Method of compensating for subsidence below a continuously laid solid roadway

Publications (1)

Publication Number Publication Date
EP0629743A1 true EP0629743A1 (en) 1994-12-21

Family

ID=6490185

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94108666A Withdrawn EP0629743A1 (en) 1993-06-11 1994-06-07 Method for compensating subsidence of a longitudinal fixed railway track foundation

Country Status (2)

Country Link
EP (1) EP0629743A1 (en)
DE (1) DE4319470C1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012009284A1 (en) 2012-05-11 2013-11-14 Goldschmidt Thermit Railservice Gmbh Method for remediating a solid ballast track constructed in e.g. railway station, involves forming filling openings along long side of threshold region before filling the filling material into cavity
CN107489075A (en) * 2016-06-13 2017-12-19 中国铁道科学研究院铁道建筑研究所 A kind of plate-type ballastless track self-compacting concrete negative pressure pouring construction method

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19631430C2 (en) * 1996-08-03 2000-03-23 Zueblin Ag Method for introducing filler material under a solid carriageway and device for carrying out the method
DE19848655B4 (en) * 1998-05-12 2009-09-17 Ed. Züblin Ag Renovation of slab tracks
NL1010212C2 (en) * 1998-09-29 2000-03-30 Pieter Faber System for leveling subsided concrete raft used as building foundation, involves multiple injection points to force hardening material below areas which are lower than others

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2305536A1 (en) * 1973-02-05 1974-08-08 Sieke Helmut METHOD FOR LIFTING TRACKS AND PAVING PIECES, DEVICE FOR CARRYING OUT THIS METHOD AND SLEEPER
EP0409356A1 (en) * 1989-07-21 1991-01-23 Voorbij Groep B.V. Process for laying a foundation, and foundation
DE4203493A1 (en) * 1992-02-07 1992-08-13 Guenter Dr Ing Habil Drescher Foundations with subsidence compensation - consists of jacket with adjustable filling and support piston

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1914712C3 (en) * 1969-03-22 1973-09-27 Stahlwerke Peine-Salzgitter Ag, 3150 Peine Method of making a railroad track
DE3838534A1 (en) * 1988-11-14 1990-05-17 Willich F Berg Bautechnik Method and installation for renewing areas covered with large concrete slabs
DE3840795A1 (en) * 1988-12-03 1990-06-07 Zueblin Ag Method for producing a ballastless railway superstructure, and precast parts and device for carrying out the method
DE4201108C2 (en) * 1992-01-17 1997-01-09 Zueblin Ag Procedure for subsequent height adjustment of a seamless concrete road

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2305536A1 (en) * 1973-02-05 1974-08-08 Sieke Helmut METHOD FOR LIFTING TRACKS AND PAVING PIECES, DEVICE FOR CARRYING OUT THIS METHOD AND SLEEPER
EP0409356A1 (en) * 1989-07-21 1991-01-23 Voorbij Groep B.V. Process for laying a foundation, and foundation
DE4203493A1 (en) * 1992-02-07 1992-08-13 Guenter Dr Ing Habil Drescher Foundations with subsidence compensation - consists of jacket with adjustable filling and support piston

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012009284A1 (en) 2012-05-11 2013-11-14 Goldschmidt Thermit Railservice Gmbh Method for remediating a solid ballast track constructed in e.g. railway station, involves forming filling openings along long side of threshold region before filling the filling material into cavity
DE102012009284B4 (en) * 2012-05-11 2015-01-22 Goldschmidt Thermit Railservice Gmbh Process for the rehabilitation of a solid road / solidified gravel railway
CN107489075A (en) * 2016-06-13 2017-12-19 中国铁道科学研究院铁道建筑研究所 A kind of plate-type ballastless track self-compacting concrete negative pressure pouring construction method

Also Published As

Publication number Publication date
DE4319470C1 (en) 1994-08-11

Similar Documents

Publication Publication Date Title
DE69304625T2 (en) Process for installing a railway track in concrete
DE69924777T2 (en) Method for producing a track superstructure
DE2063727A1 (en) Method for stabilizing a ballast bed
DE4439894C2 (en) Track superstructure
DE19620731A1 (en) Rigid track for rail vehicles across bridges
EP0547082B1 (en) Foundation for railway track
EP1644581B1 (en) Method for the construction of a track structure for railborne vehicles, particularly trains
DE4319470C1 (en) Method of compensating for subsidence below a continuously laid solid roadway
DE102019210289A1 (en) Ballast-plastic composite body
DE2233263A1 (en) CONSTRUCTION PROCEDURES FOR UNDERPASSES (RAILWAYS, ROADS) IN PARTICULAR FOR CASES WHERE TRAFFIC MUST NOT BE INTERRUPTED ON THE ROUTE TO BE UNDERPASSED
DE4423542A1 (en) Ballast for railway permanent way
DE3833720A1 (en) Method for producing a superstructure for railways
DE10261641A1 (en) Method of making a slab track and track
DE4325476A1 (en) Method for producing a substructure for a track for rail vehicles
AT402413B (en) DEVICE FOR SECURING A ROAD CHANNEL PASSAGE
DE19952803C2 (en) Superstructure for rail-bound public transport vehicles and method and device for its manufacture
DE1946712A1 (en) Insulation for level crossings
DE69916641T2 (en) IMPROVEMENTS ON OR WITH REGARD TO RAILWAY RAILWAYS
DE10236535A1 (en) Ballast-free track for manmade structures such as bridges comprises a tube divided in the separating plane between a support plate and a track plate and having sections connected by a filling allowing limited displacement of the track plate
DE102017003251A1 (en) Process for subsequent soil consolidation
DE4204802A1 (en) Stabilising joint filling between rail and road surface - uses concrete grout injected into cavity between rail,bed,and cover plate
DE4303190A1 (en) Large-area concrete slab for covering track installations
DE102007056408A1 (en) Roadway constructing system, has excavation area provided with gas, drinking water, and drainage lines, and embedment and soil exchange area, which are filled with self-condensing and hardable material mixture brought in flowable form
EP1298251A1 (en) Ballast-free railway track structure and method of building such structure
DE29515275U1 (en) Device for keeping a gap between joints of paving stones and / or floor slabs

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LI NL

17P Request for examination filed

Effective date: 19950518

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 19970415

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19970920