EP1974099A1

EP1974099A1 - Method for producing a ballastless track

Info

Publication number: EP1974099A1
Application number: EP07711153A
Authority: EP
Inventors: Wolfgang Markus; Horst Eduard Steinfeld; Heiko Sante
Original assignee: Ls Beratungsbuero Lublow GmbH; Hain Silke; ThyssenKrupp GfT Gleistechnik GmbH; Hain Uwe
Current assignee: Ls Beratungsbuero Lublow GmbH; Hain Silke; ThyssenKrupp GfT Gleistechnik GmbH; Hain Uwe
Priority date: 2006-01-17
Filing date: 2007-01-17
Publication date: 2008-10-01
Also published as: CA2637208A1; WO2007082519A1; DE102006002375B3

Abstract

The invention relates to a method for producing railway tracks of the ballastless track-type that are not entirely supported, especially for the reconstruction of existing railway systems. According to said method, foundations are introduced into the soil (5) at predetermined intervals along the railway track, especially in the form of injection piles (5), the soil is dug out down to a predetermined level and caissons (8) are positioned at least in the area above the previously introduced foundations. The soil inside the caissons (8) is removed down to a further level while simultaneously lowering the caissons, thereby producing an excavation, at least one transverse girder (12) is functionally connected to the foundation, especially the injection piles, and said transverse girder is connected in a subsequent step to the longitudinal girders (17) which support the track that is not entirely supported.

Description

Method for producing a solid roadway

The invention relates to a method for the production of non-overlying superposed railways in the manner of a fixed track, in particular for the renovation of existing track systems.

By WO 2004/031483 a solid roadway for rail transport has become known, which is characterized by a frame-like construction. The frame-like construction incorporates two rail-parallel prefabricated reinforced concrete elements, whereby pre-assembled track rail supports of a statically limited length running parallel to the track are used. The track rail supports are supported on high pressure injection earth-nested reinforced concrete composite piles.

In DE-C 39 27 251 a method for laying railway rails is dealt with, comprising the steps of holding the rails in a predetermined track and horizontal and vertical alignment, on a continuous support in the form of foundation beams. An elongated trench or elongated trenches are formed under the rails to receive flexible tubular elements that are filled with a curable composition so that their upper surfaces contact the foot of the rails and crawl around that leg to form a continuous bed to form for the rails.

The DE-Utility Model 89 11 400 is a ballastless superstructure, mainly for metro and light rail, refer to, in which the area is seeded next to and between precast with grass. The superstructure consists of two finished parts. These finished parts have bearing cusps, between which there are rail fasteners that hold the rail position properly.

In DE-A 40 27 836 a substructure for a running at the same height with the individual traffic or laid in tunnels track for rail vehicles is described, wherein the track-forming rails are mounted so elastically that they are under load by a driving above Rail vehicle can move over a predeterminable travel. Under each rail of the track, a rigid, continuous carrier is provided, which may be formed for example by a precast concrete part.

The aim of the subject invention is to provide a novel method for the production of non-superimposed superimposed railways in the manner of a fixed carriageway, in particular for rehabilitation of existing track systems, taking into account the specified safety and strength requirements, especially when train operation, within a short period can be created. In the case of redevelopment, downtime for train traffic should be kept as low as possible.

This object is achieved by a method for the production of non-overlying superposed railways in the manner of a fixed track, in particular for rehabilitation of existing track systems by foundations, in particular in the form of Verpresspfählen, introduced at predetermined intervals along the rail in the ground, the ground up be excavated to a specifiable level and placed at least in the area above the previously introduced foundations sinker, the soil is removed within the caissons to create a pit while lowering the caissons to another level, then with the foundation, in particular the injection piles, at least one cross member brought into operative connection and selbiger in a subsequent working step with, the non-overlying superimposed rail path based, longitudinal beams is connected.

Advantageous developments of the subject invention can be found in the dependent claims.

In the case of a renovation of existing track systems, the foundations, in particular the injection piles, are introduced through the ballast bed of a track to be reinforced, wherein the segmentation of the threaded rods of the Pressing piles made in such a way that after pressing the respective threaded rod ends at a depth of about 75 to 95 cm below the lower edge of the remaining rails.

After the foundations have hardened, the existing rails and sleepers are removed first. Subsequently, the old ballast / substructure is ground dependent removed to a depth of about 55 to 85 cm below the lower edge of the former rails. In the field of foundations then caissons are then designed on the then given level, the free inner dimension advantageously circumferentially by a predetermined amount, e.g. 1 to 2 cm, is larger than the cross member used in each case.

Within the caissons, which now form a kind of excavation, the existing material is gently removed in particular by means of suction and exposing the threaded rod heads, the sinkers to be re-used fall to the predetermined depth.

Within the pit then at least one cross member is installed in the area of the need for extended elongated threaded heads and connected to the foundation height and correct position.

The given openings in the region of the / of the cross member) are then filled with mortar, in particular a slightly swelling and fast-curing special mortar, to the upper edge of the respective cross member.

Once the required initial strength of the mortar is achieved, the caissons are dismantled and removed.

Subsequently, the longitudinal members can be installed in the correct position on the / the cross member (s) that the extended threaded rod heads protrude into corresponding opening areas of pre-assembled connections of the longitudinal beams formed of steel or reinforced concrete. Here you will find the height and side adjustable Adjustment of the longitudinal beams instead, with fixed on the free heads of the (extended) threaded rods steel plates with nuts.

After at least one test load of the entire system and subsequent on-demand readjustment after prior accurate measurement, the openings still given in the area of the side members with mortar, especially a slightly swelling and fast-curing special mortar, filled.

The interposed ballast can then be reinstalled between the side rails and laterally the same to the neighboring track and the free side, so that on the one hand improves the sound insulation and on the other hand, the bottom is not sealed.

The subject invention thus shows ways to provide on the one hand in relatively rapid construction progress new railways to the system slab track. On the other hand, an excellent opportunity is presented to equip existing old plants in such a way with new solid lanes that the train traffic is only slightly affected.

The resulting, for example, by the rail forces, both horizontally in the longitudinal and transverse direction and vertically, are discharged in the novel system solution for Auflagerherstellung linear over a box-shaped horizontally extending transversely to the longitudinal direction construction in acting as part of a vault piles of individual foundations. This box-shaped construction may consist of a steel frame with corresponding stiffeners and openings for the connection of the foundations or of corresponding reinforced concrete frames. The connection of the foundations to the transverse frame and further to the longitudinal members is advantageously carried out via a commercially available threaded hollow rod, but also structurally possible over other steel or concrete structures. The subject invention is illustrated by means of an embodiment in the drawing and will be described as follows. Show it:

Figures 1 to 4 Various steps for upgrading a track on a double track railway in this example.

Figures 1 to 4 show in chronological order the basic workflows of the method according to the invention for the production of non-overlying superimposed railways in the manner of a fixed carriageway.

Shown is a double track railway 1 (Figure 1) including the tracks 1 ', 1 "The sleepers 2 for the rails 3 are each positioned in a ballast bed 4. This is the conventional storage for rails 3 in railway lines 1 which has been common for decades ,

In this example, the right track 1 "is to be upgraded without significantly impairing the train traffic.

For example, in a nocturnal break pause the selected foundations, here injection piles 5, introduced by the ballast 4 to a lower level. In this example, to improve the track 1 ", the injection piles 5 together with threaded rods 6 are to be introduced to a predefinable depth into the surrounding soil 5 'for static reasons, the injection piles 5 being provided at predeterminable angles of inclination The injection piles 5 each contain a threaded rod 6. The segmentation of the threaded rods 6 of the injection piles 5 takes place in such a way that after the pressing, the respective threaded rod 6 ends at a depth of approximately 80 to 90 cm below the lower edge 7 of the rails 3. The hardening of the injection concrete of the injection piles 5 then takes place under running train operation, so that the lock pauses for train operation are low. After curing of the concrete is to complete the then upgraded track 1 "a further break for the train operation on this track 1" required. First, the existing rails 3 are dismantled and depending on the state laterally stored or driven off (Figure 2). The sleepers 2 are dismantled and driven off. Subsequently, the old ballast 4 / substructure is reduced to a level 4 'of about 60 to 75 cm below the lower edge 7 of the rails 3, traversed and stored. This is given due to the geometry of a double-railed railway line 1 without shoring to neighboring track 1 'and without much restriction of the ability to drive the same. For the now required further excavation of a pit for at a distance of about 5 to 7 m to be installed box-shaped cross member would normally be the preparation of a time-consuming and costly construction to neighboring track 1 'down. This effort is bypassed as follows:

There are at the installation sites of the cross member steel boxes 8 in the correct position designed on the substructure 9 to be removed. These steel caissons 8 have a free inner dimension, which in this example circumferentially about 1 cm larger than the used reaching cross member. The height of the steel caissons 8 should be approximately 40 to 70 cm in this example. Now, the substructure 9 within the steel caissons 8, for example by means of suction, for the exposed threaded rod heads 10 of the threaded rods 6 gently removed, the reusable boxes to be used 8 as a temporary shoring down to the required level 4 "fall (Figure 3). At least one cross member 12 is installed in height and position in the secured excavation 11. The height and positionally accurate alignment can be achieved, for example, by simple wooden or steel wedges for force transmission between cross member 12 and foundations 5, for example, fixed by nuts 13. Subsequently, the threaded rod 6 is extended upwards by about 50 to 60 cm via a connecting sleeve 14 with internal thread Cross member 12, which are located around the threaded rod heads 10, filled with a slightly swelling and fast-curing special mortar to the top 16 of the cross member 12.

After reaching the required initial strength (about 1 to 2 hours), the reusable steel boxes 8 can be dismantled, since the task of the Verbaus is now taken over by the cross member 12.

Subsequently, the longitudinal members 17 are installed in the correct position such that the elongated threaded rod heads 18 protrude into corresponding openings 19 of the existing steel or reinforced concrete longitudinal member 17 (Figure 4). The side members 17 are now adjusted by means of commercially available height and side adjustable spacers (not shown) to the exact height and location. Analogous to the power transmission through the threaded rods 6 between the foundations 5 and the cross member 12 are now in the openings 19 of the longitudinal beams 17, between and laterally the same on the threaded rod heads 18 of the connecting sleeves 14, steel plates 20 with nuts 20 'fixed. After a trial load of the system and on-demand readjustment following an exact measurement, the still given openings 19 of the longitudinal members 17 are closed by backfilling with a slightly swelling and fast-curing special mortar.

By this method, a precisely aligned and short-term high loadable new solid roadway for railways is provided in not completely superimposed form.

Between the longitudinal members 17 outside the structural joints and the side of the side rail 17 to the neighboring track 1 'and the free side, a large part of the previously removed ballast 4 can be reinstalled, so that on the one hand the soundproofing improved and on the other hand, the bottom is not sealed. Depending on the condition, the original rails 3 can be reused as needed. Commercially available connection and support means, for example in the form of ribbed plates, are used.

LIST OF REFERENCE NUMBERS

1 EisenbahnstreckÖ r track

1 "track

2 threshold

3 rail

Gravel 'level' level

5 injection pile 'soil

threaded rod

Lower edge of rail

Stahlsenkkasten

substructure

10 threaded rod end

11 excavation pit

12 cross members

13 steel plate

13 'mother

14 connecting sleeve

15 opening cross member

16 top edge cross member

17 side members

18 threaded rod end (extended)

19 Opening side member 0 Steel plate 0 'Nut

Claims

claims

1. A process for the production of not fully superimposed railways in the manner of a fixed track, especially for rehabilitation of existing track systems by foundations at predetermined intervals along the rail in the soil foundations, in particular in the form of Verpresspfählen (5) are introduced, the soil except for one Predetermined level (4 ¹ ) excavated and at least in the area above the previously introduced foundations (5) caissons (8) are placed, the soil within the caissons (8) for generating a pit (11) while lowering the caissons (8) is removed to a further level (4 "), then brought into operative connection with the foundation, in particular the injection piles (5), at least one cross member (12) and selbiger in a subsequent working step with, not the full surface superimposed rail established, longitudinal beams (17 ) is connected.

2. The method according to claim 1, characterized in that as foundations threaded rods (6) containing injection piles (5) are used.

3. The method according to claim 1 or 2, characterized in that the Verpresspfähle (5) are introduced under predeterminable inclination angles in the deeper soil (5 ').

4. The method according to any one of claims 1 to 3, characterized in that after introduction of the or the cross member (s) (12) in the region of the caisson (8) selbiger / selbige height and correct position with the foundation, in particular the Verpresspfählen ( 5) is brought into operative connection or be.

5. The method according to any one of claims 1 to 4, characterized in that the foundations (5) together with the or the cross member (s) (12) with mortar, in particular a lightly swelling and fast-curing special mortar, to the top edge (16) of the / the cross member (s) (12) are filled.

6. The method according to any one of claims 1 to 5, characterized in that after reaching a required initial strength, the caissons (8) are dismantled and removed.

7. The method according to any one of claims 1 to 6, characterized in that the longitudinal members (17) are installed in the correct position such that, when using threaded rods (6), the free ends of the optionally elongated threaded rods (6) in corresponding openings (19 ) Pre-assembled connections of the longitudinal members (17) protrude.

8. The method according to any one of claims 1 to 7, characterized in that the longitudinal members (17) are adjusted by means of height and side adjustable spacers to their exact height and location.

9. The method according to any one of claims 1 to 8, characterized in that following at least one test load of the system and on-demand readjustment after previous exact survey by filling the openings (19) with mortar, in particular with a slightly swelling and fast-curing special mortar, a precisely aligned and heavy duty solid roadway is formed.

10. The method according to any one of claims 1 to 9, characterized in that for the renovation of existing track systems (1 ', 1 ") the foundations, in particular the Verpresspfähle (5), through the ballast bed (4) of a track to be ertüchtigenden (1") be introduced into deeper soil (5 '), wherein the segmentation of the threaded rods (6) of the injection piles (5) takes place in such a way that after pressing the respective threaded rod (6) at a depth of about 75 to 95 cm below the lower edge (7) of the remaining rails (3) ends.

11. The method according to claim 10, characterized in that after curing of the foundation (5) first the existing rails (3) and the associated sleepers (2) are dismantled, then the old ballast (4) / substructure to a depth of approx . 55 to 85 cm below the lower edge (7) of the former rails (3) is removed in the area of the foundations (5) caissons (8) on the then given level (4 ') are designed, the free inner dimension circumferentially by a predetermined Amount is greater than the or used reaching cross member (12).

12. The method according to claim 10 or 11, characterized in that the substructure in particular by means of extraction within the caissons (8) exposing the threaded rod heads (10) is gently removed, with the re-used caissons (8) down to the selected level ( 4 ").

13. The method according to any one of claims 10 to 12, characterized in that in the resulting excavation (11) height and positionally at least one cross member (12) is installed, wherein the exposed threaded rod heads (10) steel plates (13) for power transmission between cross member (12) and foundation (5), fixed by nuts (13 ') applied.

14. The method according to any one of claims 10 to 13, characterized in that via a connecting sleeve (14) with internal thread, the respective threaded rod (6) is extended by approximately 45 to 65 cm upwards and then subsequently the openings (15) of the cross member (12), which lie around the threaded rod heads (10) of the threaded rods (6), with mortar, in particular a lightly swelling and fast-curing special mortar, to the top edge (16) of the cross member (12) are filled.

15. The method according to any one of claims 10 to 14, characterized in that after reaching a required initial strength, the reusable caissons (8) are dismantled and removed.

16. The method according to any one of claims 10 to 15, characterized in that then the longitudinal members (17) are installed in the correct position such that the elongated threaded rod heads (18) in corresponding opening portions (19) of pre-assembled compounds of steel or reinforced concrete longitudinal members (17 ) protrude.

17. The method according to any one of claims 10 to 16, characterized in that the longitudinal members (17) are adjusted by means of height and side adjustable spacers to their exact height and position, wherein in the openings (19) of the longitudinal members (17) on the free Head threaded rods (18) of the connecting sleeves (14) steel plates (20) with nuts (20 ') are fixed.

18. The method according to any one of claims 10 to 17, characterized in that after at least one test load of the overall system and on-demand readjustment after previous exact survey by filling the openings (19) with mortar, especially with a slightly swelling and fast-curing special mortar, a precise aligned and short term heavy duty solid roadway is formed.

19. The method according to any one of claims 10 to 18, characterized in that between the longitudinal members (17), outside of the structural joints and the side of the side members (17), if necessary, to a neighboring track (1 ') out, at least a portion of the previously removed ballast (4) is reinstalled.

20. The method according to any one of claims 1 to 19, characterized in that rails (3) are applied by means of standardized connecting means on the longitudinal members (17), wherein, if necessary, also standardized ribbed plates as bearing means for the rails (3) are used.