EP1734186B1 - Method for the production of a track for magnetic levitation train - Google Patents

Abstract

The method for producing trackways for magnetic levitation transport systems whose upper surface is formed from precision steel plates comprises casting concrete dummy panels (3), in which the plate mountings (4) are embedded. The panels are then removed and the steel plates manufactured using them as a template. Independent claims are included for: (A) Metal plates for use in making the trackways; and (B) the dummies.

Description

Technical area

The invention relates to the production of the carriageway of a magnetic levitation train from precast load-bearing slabs on a guideway carrier.

State of the art

The trajectories of magnetic levitation trains are usually constructed from precast slabs, which rest on a guideway support bearings. The orientation of the precast slabs absolute and relative is of great importance. For this purpose, the finished part support plates are measured accurately and then z. B. made exactly manufactured supports for the precast slabs, zBaus mortar (original design in Transrapid in Emsland) or steel (eg EP 1 441 066 B1 ).

The assembly of prefabricated slabs is therefore very time-consuming, because the finished part is stuck during installation until hardening of the bearing.

In the WO 03/008 709 A describes a method to produce the carrier of a maglev train with exactly aligned brackets for attaching the vehicle leading metal attachments in situ concrete. For this purpose, the method requires several consecutively applicable and exactly aligned gauges. The process is complicated and in rough construction operation, the accuracy of the final product is not guaranteed by the number of process steps and the passing on of subsequent defects.

Object of the invention

The object of the invention is to reduce the effort to install the precast slabs and make post-processing unnecessary.

Presentation of the invention u

The object is solved by the features specified in the characterizing part of claim 1.

For this purpose, a precise measurement of the finished part support plate (2) is dispensed with. Instead, a "dummy" (3) is positioned above the already completed lower part (1a) of the guideway carrier in the desired position of the prefabricated support plate (2) located there later, on which mounting parts (4) for the upper part (1b) of the guideway carrier still to be concreted can be detached are attached.

Subsequently, the upper part (1b) of the guideway carrier is concreted and the dummy (3) is removed after sufficient hardening of the concrete. The built-in parts (4) remain in the newly concreted upper part (1b) of the guideway carrier.

The prefabricated panels (2) and the bearing parts (5) are made exactly the same in the factory (matching the dummy (3)), then on bearings (5) simply on the embedded components (4) of the guideway carrier (1b) are placed and lie then automatically in Sollage.

As a dummy (3) can either a prefabricated support plate (2) itself, or, preferably, serve a significantly lighter custom-made. This special production does not even have to have exactly the outer shape of the finished part support plate (2). It is sufficient if it exactly mimics the shape of the finished part support plate (2) at the relevant points, especially the bearing points.

The holder and exact positioning of the dummy (3) relative to the guideway carrier is done by holding devices (8, 9, 10, 12, 13), which are supported on the already created lower part (1a) of the guideway carrier (preferred procedure) or on the ground.

In a preferred variant, which is illustrated with reference to figures, the lower part (1a) of the guideway carrier is manufactured as "endless" Ortbetonbalken with the construction tolerances, while the production of prefabricated slabs (2) in the precast plant from the installation of the mounting parts to milling the bearing reference levels meet the highest tolerance requirements (as usual in machine building).

Fig. 1 shows in cross-section the in-situ concrete manufactured lower part (1a) of the guideway carrier in the form of a guideway bar. The connecting reinforcement (6) and the formwork (7) for the upper part (1b) still to be concreted can also be seen. The in-situ concrete beam forms a nearly rigid system on which the adjusting devices (8, 9, 10, 12, 13) and the dummies (3) can be supported without deformation.

The formwork (7) can be measured relative to the done plate adjustment. A precise position of the formworks (7) is important, since only small tolerances are available to the clearance profile in the area of the still to be concreted console.

Fig. 2 shows in cross section the track bar (1 a) of Fig. 1 with a possible construction and mounting of the Justierrahmen (8). At the top of the frame (8) sit short column feet (9), which are precisely adjustable in the vertical direction with a Justiergewinde. On these feet is a steel console (10) attached, which is adjustable in the horizontal. With the aid of two steel carriages (12), the measuring point can thus be positioned both vertically and horizontally. The accuracy reaches that of mechanical engineering.

Fig. 3 shows in perspective a possible adjusting slide (12) in detail. He can wear for adjusting the measuring point, for example, a Justierprisma (13).

The measuring points (and the Justierrahmen (8)) are each exactly in the joint area of two precast slabs (2). As a result, the adjoining exactly manufactured precast slabs (2) are later without offset side by side, since by measuring an axis on the plate joint (connecting line between the measuring point left and right of the road) always both plates (2) are automatically at the same height. The track is thus lined up and assembled from individual precast slabs (2) as a link chain.

The adjustment of the measuring points to each other along the road on straight track pieces by a straight line (laser beam) through the Justierprismen (13) is placed.

The transfer of hitherto only virtual orientations in the structural design requires the use of auxiliary structures, the dummies already mentioned (3).

The geometric transmission of the adjustment of the metered axis at the plate impact on the bearings (5) of the finished part support plates (2) must be ensured by the dummies (3). For this purpose, adjoining dummies (3) are located on the later panel joint on a crossbeam (14) (parallel to the measured axis).

• sie sind wesentlich leichter als die eigentlichen Fertigteiltragplatten (2)
• das Betonieren des noch fehlenden Oberteiles (1b) des Fahrwegträgers ist durch die in den Ausmaßen reduzierte Form des Dummys (3) relativ leicht möglich
• das notwendige Aufsetzen von zwei aneinanderstoßenden Fertigteiltragplatten (2) auf einer Quertraverse (14) ohne Versatz kann mithilfe der Dummys (13) relativ leicht erreicht werden.

The dummies (3) have the following characteristics and tasks:

• they are much lighter than the actual precast slabs (2)
• the concreting of the still missing upper part (1b) of the guideway carrier is relatively easily possible due to the reduced dimensions of the dumbbell (3)
• the necessary placement of two abutting precast slabs (2) on a crossbeam (14) without offset can be achieved relatively easily by means of the dummies (13).

The Fig. 4 shows in cross-section on the Justierschlitten (12) patch cross-beam (14) as a material realization of the virtual Plattenstoßachse.

Dummies (3) can now be placed on this crossbeam (14) from both sides. In order to avoid obstruction of both dummies (3) on the shock axis, they have a horizontal offset on their side members. This is in Fig. 5 shown in perspective.

The transverse members (14) can be mounted exactly and yet stably on balls (15), as in Fig. 6 shown in the view from the side.

To ensure that tolerances do not add up to untolerable size, all steel components used must be machined, that is, their tolerances must be in the range of hundredths of a millimeter. Of course, this also requires appropriate cleaning and care on the construction site.

The adjusted transverse members (14) and dummies (3) must also be protected against misalignments until concreting of the upper part (1b) of the guideway carrier. If necessary, must be readjusted.

Fig. 7 shows in cross-section the guideway support (1a, 1b) including the dummies adjusted above, after the upper part (1b) of the guideway carrier has been concreted.

After the concrete has hardened sufficiently and the dummies have been removed, remain in the upper part (1b) of the guideway carrier still built-in parts (4) (these were previously detachably attached to the dummies (3)), on the bearings (5), preferably made of steel, be put on. This condition is in Fig. 8 shown in perspective.

Due to the exact measurement of the bearing anchorage as well as the machine geometry milled geometrical position of the anchoring to the precast bearing plate (2) all steel bearings (5) may be identical. This makes them relatively easy to replace. If, nevertheless, a tolerance error has occurred in the system, it can be compensated for as individual parts by milled bearing (5).

Due to the predetermined bearing anchorage on Ortbetonbalken (1a, 1b), the track plates (2) can be placed relatively easily. As a result of the statically determined storage of the track plate (2) (two transversal bearings (5) and a longitudinally fixed bearing (5) and three freely movable bearings (5)), the touchdown is completely constrained. Plate elongations in the longitudinal and transverse directions, for example, due to different ambient temperature compared to the temperature in the precast plant, can also be included in the camps.

Fig. 9 shows in perspective the guideway support (1a, 1b) with superimposed finished part support plates (2).

If the route does not represent straight spatial curves, but is curved in a circular arc or a transition arc, then the adjustment points are determined by means of a defined deviation from the straight beam.

As with the straight track applies here that a possible error when calibrating the Justierpunkte only generates a kink in the guideway. However, the tolerances for a kink are significantly greater than the permissible tolerances in the offset of two track plates (2).

For the alignment of the prefabricated part support plates (2) in curves, the dummy (3) can additionally be easily twisted during the fitting process in order to simulate a distortion of the finished part support plates (2) screwed onto the track support (1b) under tension.

LIST OF REFERENCE NUMBERS

1a

Lower part of the guideway carrier

1b

Upper part of the guideway carrier

2

Precast support plate

3

dummy

4

fitting

5

camp

6

Connection reinforcement from 1a to 1b

7

Formwork for upper part 1b

8th

adjusting frame

9

column bases

10

steel console

11

Reinforcement upper part 1b

12

Justierschlitten

13

Justierprisma

14

crossbeam

15

Ball for exact positioning of the crossbeam

Claims (3)

1. A method for the production of a magnetic levitation train track consisting of precast slabs (2) supported on a guideway carrier (1a, 1b),
   characterized in that

   a.) precast slabs (2), which are exactly prefabricated to steel engineering precision at all relevant points, are employed;

   b.) a dummy (3), which materializes the relevant dimensions of the support of such a precast slab (2) to the guideway carrier (1a, 1b), is placed/fixed in the nominal position of such a precast slab (2), which will later be located there, above the already concreted lower part (1a) of the guideway carrier on/along cross girders (14), which are located at the place of the joint between two precast slabs (2);

   c.) the upper part (1b) of the guideway carrier is subsequently concreted during which inserts (4), which are removably fixed on the dummy (3) for future support of the precast slab (2) on the guideway carrier (1a, 1b), are concreted into the upper part (1b) with a true fit;

   d.) the dummy (3), after sufficient hardening of the concrete, is separated from the inserts (4), which are now embedded in the guideway carrier, and removed or transferred/shifted to a next position; and

   e.) in that immediately or later uniform, in the event of a rare maladjustment also specially made, bearings (5) are mounted on the inserts (4); and

   f.) in that finally the exactly prefabricated precast slabs (2) are placed onto these bearings (5) and fixed.
2. A method according to claim 1,
   characterized in that the adjustment frames (8) for measuring the nominal position of the precast slabs (2) and for holding the dummies (3) on the lower part (1a) of the guideway carrier support themselves without any deformation.
3. A method according to at least one of claims 1 and 2,
   characterized in that the dummy (3) in the case of bent tracks is turned slightly corresponding to the curves, whereby the exactly prefabricated precast slabs (2) take on this slightly turned shape after their installation.

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