Turnout arrangement with elastically supported turnout bases
A turnout arrangement of a slab track with a ballastless superstructure for forming a main track ( 1 ) and a branch track ( 2 ) which branches off from the main track for railway traffic has a plurality of prefabricated turnout bases ( 3 ) of untensioned reinforced concrete, a casting compound ( 5 ), which is cast and hardened between the aligned turnout bases and the ground ( 4 ), a plurality of fastening areas ( 6 ) which are rail support points ( 7 ) provided on the turnout bases for the rail fastening of the main track, the branch track, and further turnout components. The turnout bases of the turnout arrangement are elastically supported, and each turnout base is provided with a positive-locking arrangement for positively holding the turnout base horizontally with respect to the casting compound. An elastic layer ( 8 ) is provided between a projection ( 13 ) of an element of the positive-locking arrangement and the turnout base.
1. A turnout arrangement of a slab track with a ballastless superstructure for forming a main track and a branch track, which branches off from the main track, for railway traffic, the turnout arrangement comprising:
a plurality of prefabricated turnout bases of untensioned reinforced concrete;
a casting compound, which is cast and hardened between the plurality of prefabricated turnout bases and a ground surface; and
a plurality of fastening areas, comprising rail support points provided on the plurality of prefabricated turnout bases for fastening of the main track and the branch track as well as for fastening further turnout components;
wherein the plurality of prefabricated turnout bases are elastically supported,
wherein at least one positive-locking arrangement is provided per prefabricated turnout base for positively holding the prefabricated turnout base horizontally with respect to the casting compound, wherein the positive-locking arrangement comprises first and second positive-locking elements, which are in positive active contact with one another, wherein the first positive-locking element is a casting opening kept free in the prefabricated turnout base, and wherein the second positive-locking element is a projection of the casting compound extending into the casting opening, wherein the projection and the casting opening is are configured such that introduced horizontal shear forces are below the maximum permissible load limit of the prefabricated turnout base and the projection, and
wherein an elastic layer is provided per prefabricated turnout base between the projection and the prefabricated turnout base, and wherein the elastic layer for at least one prefabricated turnout base is disposed between the prefabricated turnout base and the casting compound and extends continuously under a pair of adjacent rail support points that includes a first rail support point for the main track and a second rail support point for the branch track.
2. The turnout arrangement according to claim 1 , wherein the plurality of prefabricated turnout bases are elastically supported individually, and are supported or mounted free of constraint forces.
3. The turnout arrangement according to claim 1 , wherein the plurality of prefabricated turnout bases are elastically supported horizontally with respect to at least one of (a) the ground surface and (b) each other, and transverse to the course of the track.
4. The turnout arrangement according to claim 1 , wherein a gap is kept free between each of the plurality of prefabricated turnout bases, and elastic support for the plurality of prefabricated turnout bases is provided by an elastic support with respect to the ground surface.
5. The turnout arrangement according to claim 1 , wherein the plurality of prefabricated turnout bases are elastically supported in the vertical direction.
6. The turnout arrangement according to claim 1 , wherein the elastic layer is arranged between the plurality of prefabricated turnout bases and the casting compound for elastic decoupling of the plurality of prefabricated turnout bases.
7. The turnout arrangement according to claim 6 , wherein the elastic layer is formed in several parts.
8. The turnout arrangement according to claim 1 , wherein the elastic layer is arranged between the first and second positive-locking elements for horizontal elastic support and for elastic decoupling of the plurality of prefabricated turnout bases.
9. The turnout arrangement according to claim 1 , wherein the at least one positive-locking arrangement configured to positively hold the turnout base vertically with respect positive-locking elements for vertical elastic support and for elastic decoupling of the plurality of prefabricated turnout bases.
10. The turnout arrangement according to claim 1 , wherein the second positive-locking element has an undercut such that a region located at the top of the second positive-locking element projects beyond a region located further down in the horizontal direction of the second positive-locking element or is designed to widen towards the top, and a part of the turnout base extends into the undercut so that vertical positive connection is formed.
11. The turnout arrangement according to claim 1 , wherein two openings are provided per turnout base, and the projection is configured to extend in each of the two openings.
12. The turnout arrangement according to claim 1 , wherein a smallest overall cross section of the projection extending into a turnout base is bigger than a cross section which, taking into account the strength of the casting compound, is sufficient to absorb horizontal forces introduced by a rail vehicle without damage.
13. The turnout arrangement according to claim 1 , wherein the plurality of prefabricated turnout bases have a rectangular design and have a greater dimension in the transverse direction of the course of the track than in the longitudinal direction of the course of the track.
14. The turnout arrangement according to claim 13 , wherein the smaller dimension of the plurality of prefabricated turnout bases is less than or equal to 2.6 meters.
15. The turnout arrangement according to claim 1 , wherein the plurality of prefabricated turnout bases extend continuously over the entire width of the turnout and comprise or form fastening areas for the main track and for the branch track at least after a frog of the turnout.
16. The turnout arrangement according to claim 1 , wherein the elastic layer of a first turnout base of said plurality of prefabricated turnout bases has a different stiffness and/or a different shear modulus, than the elastic layer of a second turnout base of said plurality of prefabricated turnout bases adjacent said first turnout base.
17. A track arrangement, comprising:
a turnout arrangement according to claim 1 ; and
a plurality of tracks adjoining the junctions of the turnout arrangement;
wherein the plurality of tracks are configured as slab tracks with a ballastless superstructure and comprise a plurality of prefabricated track bases of untensioned reinforced concrete, a casting compound, which is cast and hardened between the plurality of prefabricated track bases and the ground surface, and a plurality of fastening areas comprising rail support points are provided on the plurality of track bases for fastening of the plurality of tracks, wherein the plurality of prefabricated track bases are elastically supported.
18. The track arrangement according to claim 17 , wherein an elastic layer is arranged between the plurality of prefabricated track bases and the casting compound for elastic decoupling of the plurality of prefabricated track bases.
19. The track arrangement according to claim 18 , wherein the elastic layer is formed in several parts.
20. The track arrangement according to claim 17 , wherein the elastic layer of a prefabricated track base has a different stiffness and/or a different shear modulus, than the elastic layer of a prefabricated turnout base of the turnout arrangement or an adjacent track base.