专利摘要:
Prefabricated track part (10) with a concrete body (12), with at least two rail receiving grooves (15) each extending in the direction of the rail route (S), which in a transverse direction (Q) at right angles to the rail route direction (S) each through an outer wall element (17) and an inner wall element (18) separate from the outer wall element (17), the lower edge sections (19) of which are cast into the concrete body (12) and the upper edge sections (20) of which protrude from the concrete body (12), the channel bottom ( 21) of the rail receiving grooves (15) is formed by the concrete body (12), the concrete body (12) having a first concrete body height (h1) with respect to a plane (E) which is aligned parallel to the transverse direction (Q) and to the rail direction (S). in an inner area (22) between two rail receiving channels (15), a second concrete body height (h2) in an outer area (23) outside the rail receiving channels (15) and outside the interior area (22) and a third concrete body height (h3) in the rail receiving channels (15) to form the respective channel bottom (21).
公开号:CH714161B1
申请号:CH01025/18
申请日:2018-08-24
公开日:2021-11-15
发明作者:Hanisch Martin
申请人:Edilon Sedra Gmbh;
IPC主号:
专利说明:

The invention relates to a precast track part for the construction of a track body and a track body which has at least one such precast track part.
A precast track part is known, for example, from DE 20 2005 020 020 U1. There, a support plate with channel-shaped recesses is provided as a prefabricated part, into which rails can be inserted.
Based on the known prior art, it can be seen as an object of the present invention to create a precast track that allows a more flexible use for different tracks and at the same time a construction of the track body on site with as little traffic disruption as possible, especially the non-rail Vehicle traffic permitted on the track.
This object is achieved with a precast track part according to claim 1 and a track body according to claim 13.
The precast track part has a concrete body. On the concrete body there are two rail receiving channels extending in the direction of the rail path. The rail direction can be straight or curved or angled. At any point along the rail, the rail receiving channel has a course parallel to the rail. In a transverse direction at right angles to the rail direction, the rail receiving grooves are arranged at a distance.
The rail mounts are each delimited by an outer wall element and a separate inner wall element. The lower wall sections of the wall elements are cast in the concrete body and can be anchored in the concrete body. The upper edge sections of the wall elements protrude from the concrete body along their entire extent in the direction of the rail route. The channel bottom within each rail receiving channel is formed by the concrete body.
In several adjacent areas in the transverse direction, the concrete body can have different concrete body heights measured relative to a reference plane. The concrete body heights can be specified in each of the areas independently of the concrete body heights in the other areas. The concrete body has a first concrete body height in an interior area between two rail mounts. The concrete body has a second concrete body height in an outer area outside the rail mounts and outside the inner area. The concrete body has a third concrete body height below the channel bottom, that is to say in the transverse direction between the two wall elements of a common rail receiving channel. The three concrete body heights can be the same or different. They can be specified depending on the conditions at the construction site of the track body and the concrete body of the precast track has the corresponding concrete body heights before it is transported on site to the construction site.
[0008] Such a precast track part can be produced in the factory in a simple and flexible manner, adapted to the respective requirements. By forming the rail receiving grooves with the help of two separate wall elements, the track width and / or the width of a track groove can very easily be variably predefined. Because the two wall elements are designed separately, they can, if necessary, simply be bent or angled before being poured into the concrete body, should this be necessary for the course of the rails. The wall elements also represent formwork elements to provide the concrete body in the different areas with the desired concrete body height and also form formwork elements for later grouting for installing the rails in the respective rail receiving channel.
It is preferred if the concrete body has a first end and an opposite second end in the direction of the rail extension, at least one end having connection means set up for connection to an adjacent concrete body. For example, a groove and / or a protrusion can be formed in order to couple two adjoining concrete bodies when building a track on site in the transverse direction at right angles to the direction of the course of the rail.
It is also preferred if the inner wall elements are bent in their respective upper edge section to the respectively assigned outer wall element of the same rail receiving groove. Such an offset allows the width of a track groove to be adjusted in the transverse direction. The precast track can be easily adapted to different types of rails and is suitable e.g. for Vignole rails or grooved rails.
During the construction of a track body, the factory-made precast track is transported to the installation site and placed there on a prepared substrate. The construction of the track structure can be carried out without in-situ concrete. After the prefabricated track has been erected, the rail mounts and / or other open spaces can be covered and covered with planks or other materials so that the track structure is also possible with at least partial maintenance of non-rail vehicle traffic. For example, crossings between the track and a street can be covered so that cross traffic at the crossing point can flow with as little disruption as possible.
In one embodiment, the third concrete body height is at most as large as the second concrete body height and / or the first concrete body height. The third concrete body height can be adapted to the type of rail and an optionally present damping between the rail and the channel bottom, so that the top of the rail is arranged in the area of the upper edge of the wall elements. Independently of this, the first concrete body height and the second concrete body height can be adapted to the intended cover layer, in particular asphalt layer or the like.
It is also preferred if the first concrete body height is greater than the second and / or the third concrete body height. In this way, a sufficiently good covering of a reinforcement present in the concrete body can be achieved in the interior.
The underside of the concrete body preferably extends in one plane. This plane can represent the reference plane.
In one embodiment, the cross section of the rail receiving grooves is constant over the entire length.
The prefabricated track part can have at least one installation area. Such an installation area is set up to accommodate an installation. The installation can be, for example, an electrical installation and / or a drainage installation.
In one embodiment, the inner wall element and the outer wall element of a common rail receiving channel form at least one installation area that is widened in the transverse direction. An installation is arranged in the installation area and fastened by the potting. The potting for fastening the rail thus also extends into the installation area.
The installation in the installation area can be an electrical installation and / or a drainage installation.
In one embodiment, the inner wall element and the outer wall element of the same rail receiving channel outside of an installation area have a standard spacing. Within the installation area, the distance between the two wall elements of the same rail receiving channel is increased by an extension wall part. This creates an enlarged installation area. The extension wall part can, for example, have two transverse limbs arranged at a distance in the direction of the rail course and a longitudinal limb connecting the two transverse limbs. The extension wall part can have a U-shape in a plan view.
A track body according to the invention has at least one prefabricated track part described above. In the case of the track body, a rail extending in the direction of the course of the rail is arranged in each rail receiving channel, which rail is cast in the rail channel by means of a potting compound. The potting connects the rail with the inside of the respective rail receiving channel.
In one embodiment, at least one line and / or at least one tube can be arranged adjacent to the rail in at least one of the rail receiving channels. The line or the pipe extend, for example, in the direction of the course of the rail. The line or the pipe are fastened in the rail receiving channel by the potting compound.
It is preferred if the at least one concrete body of the respective prefabricated track part is covered by an asphalt covering layer. An asphalt binder layer can be present between the at least one concrete body and the asphalt surface layer. The asphalt binder course preferably connects the asphalt surface course directly to the at least one concrete body.
An asphalt base course can be present in the transverse direction adjacent to the at least one concrete body. The asphalt base layer is preferably arranged at the same height, viewed in the vertical direction, as the at least one concrete body in its outer area (second concrete body height). The asphalt binder course and / or the asphalt surface course can extend continuously from the asphalt base course to over an outer area of the at least one concrete body as far as a rail receiving channel.
Advantageous embodiments of the invention emerge from the dependent claims, the description and the drawings. Preferred embodiments of the invention are explained in detail below with reference to the accompanying drawings. Show it:
FIG. 1 shows a schematic cross-sectional view of an exemplary embodiment of a precast track part.
Figure 2 is a schematic plan view of a section of a wall element with an extension wall part and
FIG. 3 shows a schematic cross-sectional view of an exemplary embodiment of a track body with a precast track part according to FIG. 1.
In Figure 1, an embodiment of a precast track part 10 is illustrated. At least one prefabricated track part 10 is prefabricated in the factory or in the workshop and is delivered to a construction site as a uniform component in order to erect a track body 11. An exemplary embodiment of a track body 11 is shown in FIG.
The precast track part 10 has a concrete body 12 with an underside 13 and an upper side 14. The underside 13 preferably extends in a plane E, which is spanned by a rail direction S (Figure 2) and a transverse direction Q oriented at right angles to the rail direction S . The upper side 14 can have different height levels in different areas with respect to a height direction H which runs at right angles to the plane E.
The concrete body 12 can have reinforcement. The reinforcement can be produced by reinforcing elements made of metal or steel and / or composite materials.
At least two rail receiving channels 15 are present on the concrete body 12. Each rail receiving channel 15 is set up to receive a rail 16 extending in the direction S of the rail path. The rail direction S can be straight or also have a bend or curvature in order to form curves. The rail receiving grooves 15 are arranged at a distance in the transverse direction Q.
Each rail receiving channel 15 is laterally bounded in the transverse direction Q by an outer wall element 17 and an inner wall element 18. The two wall elements 17, 18 of a common rail receiving channel 15 are spaced apart in the transverse direction Q and each run in the direction of rail extension S. Each wall element 17, 18 has a lower edge section 19 with which it is cast into the concrete body 12. In addition, each wall element 17, 18 has an upper edge section 20 opposite the lower edge section 19 in the height direction H, which protrudes from the concrete body 12.
In the area between the outer wall element 17 and the inner wall element 18 of a rail receiving channel 15, the concrete body 12 forms the channel bottom 21.
In the transverse direction Q, the concrete body 12 has an inner area 22 between two rail receiving channels 15. In this inner area 22, the concrete body 12 has a first concrete body height h1. The first concrete body height h1 is measured relative to a reference plane that is spanned by the transverse direction Q and the direction S of the rails. In the exemplary embodiment, plane E serves as a reference plane.
Relative to this plane E, the concrete body 12 has a second structural body height h2 outside the inner area 22 and outside the rail receiving channels 15 in an outer area 23 or in both outer areas 22. In the area within or below the rail receiving channels 15, where the concrete body 12 forms the channel bottom 21, the concrete body 12 has a third concrete body height h3.
The different concrete body heights h1, h2, h3 can be selected independently of one another and the concrete body height 12 can be configured accordingly. The different concrete body heights h1, h2, h3 can be the same size or different sizes. In the exemplary embodiment, the first concrete body height h1 is greatest in order to adequately cover a reinforcement between the rail receiving grooves 15 in the inner region 22. The second concrete body height h2 is smaller than the first concrete body height h1 and, in the exemplary embodiment, greater than the third concrete body height h3. The third concrete body height h3 is matched to the rail type 16 and the other filling elements within the rail receiving channel so that the top of the rail head of the rail 16 is approximately flush with the upper edges of the wall elements 17, 18 or is arranged in the height direction H slightly above these upper edges .
The inner wall element 18 has an offset 24. By means of this crank 24, the distance in the transverse direction Q between the inner wall element 18 in the area of the upper wall section 20 and the rail head of the rail 16 can be adjusted, so that a predetermined track groove width b is achieved. In the area of the crank 24, the plate-shaped inner wall element 18 is angled or bent twice, so that at least part of the upper edge section 20 is arranged closer to the opposite outer wall element 17 than the lower edge section 19 of the inner wall element 18.
The outer wall element 17 is preferably plate-shaped and has a rectangular cross section in the embodiment.
The concrete body 12 extends viewed in the rail direction S between a first end and a second end. At at least one end, the concrete body 12 can, so to speak, have a connection means 28 in the area of its end face, in order to be able to establish a coupling with a further concrete body 12 of an adjacent precast track part 10, which is connected in the direction of the rail route S. The connection means 28 can be formed, for example, by a groove-like depression extending in the transverse direction Q. A projection of the adjacent concrete body 12 can engage in this groove-like depression. It is also possible that all concrete bodies 12 each have groove-like depressions as connection means 28 and a separate slot nut is inserted into the recesses of two adjoining concrete bodies 12.
In Figure 2, an optional embodiment of a rail receiving channel 15 is illustrated. One of the two wall elements 17, 18 can have an extension wall part 29 which delimits an installation area 30. In the exemplary embodiment, the extension wall part 29 has two transverse legs 31 which are arranged at a distance from one another in the direction S of the rails. The two transverse legs 31 are connected to one another by a longitudinal leg 32. In plan view along the height direction H, the extension wall part 29 therefore has a U-shaped shape. The extension wall part 29 can also have another concave shape in plan view, for example a semicircular shape or an otherwise curved and / or polygonal shape. In any case, the distance in the transverse direction Q between the two wall elements 17, 18 of the rail receiving channel 15 is increased by the extension wall part 29, which is part of the inner wall element 18 or the outer wall element 17. As a result, in addition to the rail 16, additional installation space is available in the installation area 30. An installation 33 can be arranged in this installation area 30, for example an electrical installation 34 and / or a drainage installation 35. The electrical installation 34 can for example have at least one grounding cable and the drainage installation 35 can for example have at least one drain or a drainage pipe.
As can also be seen in FIG. 3, the rails 16 are fastened within the rail receiving channel 15 by means of a potting 36. A damping strip 37 is preferably arranged between the rail foot of the rail 16 and the channel bottom 21, via which the loads acting on the rail 16 are dampened. In addition, at least one pipe 38 and / or at least one line 39 can be arranged in the potting 36 adjacent to the rail, said pipe extending, for example, in the rail direction S along the rail receiving channel 15. To produce the track body 11, the damping strip 37, the rail 16 and optionally at least one tube 38 and / or at least one line 39 are inserted into the rail receiving channel 15 and aligned there by alignment means. A flowable potting compound is then poured into the inner region of each rail receiving channel 15 and cured, so that the potting 36 is thereby formed, which, according to the example, contains the rail 16, the damping strip 37 and optionally the at least one pipe 38 or the at least one line 39 in the rail receiving channel 15 secures and lasts. The potting 36 leaves the rail head of the rail 16 at least partially free, so that the wheel tires of a train rest on the upper side of the rail head or a flange of the wheel tire can rest on the side of the rail head. It is also possible to use grooved rails which have a traveling head and a grooved head with a track groove arranged in between.
To produce the track body 11, one or more prefabricated track parts 10 are arranged on a substrate 40 on site. Between the subsurface 40 and the concrete body 12 of each precast track part 10, an intermediate layer 41 made of a granular material can be arranged, for example made of chippings and in particular hard stone chippings. The underside 13 of the concrete body 12 is placed on the substrate and, according to the example, the intermediate layer 41 without creating a connection through a flowable, hardenable material such as in-situ concrete. In the transverse direction Q laterally next to the respective concrete bodies 12, a filler layer 42 can optionally be present in order to obtain a sufficient height for the further construction. In the exemplary embodiment, an asphalt base layer 43 is applied to the filling layer 42. Viewed in the height direction H, the asphalt base layer 43 ends at the level of the outer region 23 of the concrete body 12 in question.
The outer area 23 of the concrete body 12 and the asphalt base layer 43 are each covered up to the rail receiving channel 15 with an asphalt binder layer 44 and an asphalt cover layer 45. In the inner region 22, the asphalt binder layer 44 and the asphalt cover layer 45 are applied directly to the top of the concrete body 12. The asphalt binder course 44 is in direct contact with the asphalt surface course 45 and the concrete body 12 or adjacent to the concrete body 12 of the asphalt base course 43.
The asphalt binder layer 44 can be designed with different thicknesses in the inner area 22 and in the outer area 23, viewed in the height direction H. According to the example, the asphalt binder course 44 is thinner in the inner area 22 than in the outer area 23 and above the asphalt base course 43.
During the construction of the track body 11, the prefabricated track parts 10 are placed on the substrate or the intermediate layer 41 and, if necessary, coupled to one another. If there is non-rail vehicle traffic in the area of the track, for example in the area of an intersection between the track and a road, the existing cavities and depressions within a respective rail receiving channel 15 or to the side thereof can be covered or covered with planks or other building material. The non-rail-bound traffic can drive over the track structure 11, which is still under construction, and support itself on one or more prefabricated track parts 10. As a result, a track body 11 can be built, while the non-rail traffic is impaired to a very small extent.
The track body 11 shown as an example is paved and therefore provided and set up for driving over. With the aid of one or more prefabricated track parts 10, it is also possible to produce a track body 11 which is not intended and set up to be driven over. In this case, the cover layers can be omitted or replaced by other cover layers.
List of reference symbols:
10 Precast track part 11 Track body 12 Concrete body 13 Underside of the concrete body 14 Top of the concrete body 15 Rail receiving channels 16 Rail 17 Outer wall element 18 Inner wall element 19 Lower edge section of the wall element 20 Upper edge section of the wall element 21 Channel bottom 22 Inner area 23 Outer area 24 Offset 28 Connection means 29 Extension wall part 30 Installation area 31 Transverse limb 32 Longitudinal limb 33 Installation 34 Electrical installation 35 Drainage installation 36 Grouting 37 Damping strips 38 Pipe 39 Line 40 Subsoil 41 Intermediate layer 42 Asphalt base layer 43 Asphalt base layer 44 Asphalt binder layer 45 Asphalt surface layer b Track groove width H Height direction h1 First concrete body height h2 Second concrete body height h3 Third concrete body height Q direction Cross direction S Rail course
权利要求:
Claims (21)
[1]
1. Precast track section (10)with a concrete body (12),with at least two rail receiving grooves (15) each extending in the direction of the rail route (S), which in a transverse direction (Q) at right angles to the rail route direction (S) each by an outer wall element (17) and an inner wall element separate from the outer wall element (17) (18) whose lower edge sections (19) are cast into the concrete body (12) and whose upper edge sections (20) protrude from the concrete body (12),wherein the channel bottom (21) of the rail receiving channels (15) is formed by the concrete body (12),wherein the concrete body (12) has a first concrete body height (h1) in an inner region (22) between two rail receiving channels (15), a second in relation to a plane (E) which is aligned parallel to the transverse direction (Q) and the direction of the rail course (S) Concrete body height (h2) in an outer area (23) outside the rail receiving channels (15) and outside the inner area (22) and having a third concrete body height (h3) in the rail receiving channels (15) to form the respective channel bottom (21).
[2]
2. Precast track part according to claim 1,characterized in that the concrete body (12) has a first end and an opposite second end in the rail running direction (S), at least one end having connection means (28) set up for connection to an adjacent concrete body (12).
[3]
3. Precast track part according to claim 1 or 2,characterized in that the inner wall elements (18) are cranked in their respective upper edge section (20) to the respectively assigned outer wall element (20) of the same rail receiving channel (15).
[4]
4. Precast track part according to one of the preceding claims,characterized in that the third concrete body height (h3) is at most as large as the second concrete body height (h2) and / or the first concrete body height (h1).
[5]
5. Precast track part according to one of the preceding claims,characterized in that the first concrete body height (h1) is greater than the second concrete body height (h2) and / or the third concrete body height (h3).
[6]
6. Precast track part according to one of the preceding claims,characterized in that the underside (13) of the concrete body (12) extends in a plane (E).
[7]
7. Precast track part according to one of the preceding claims,characterized in that the cross section of the rail receiving grooves (15) is constant.
[8]
8. Precast track part according to one of claims 1 to 6,characterized in that the inner wall element (18) and the outer wall element (17) of the same rail receiving channel (15) have a standard spacing outside an installation area (30), with at least one of the two wall elements (17, 18) being an extension wall part in the installation area (30) (29) which increases the distance between the two wall elements (17, 18) compared to the standard distance.
[9]
9. Precast track part according to claim 8,characterized in that the extension wall part (29) has two transverse limbs (31) arranged at a distance in the direction of the rail course (S) and one longitudinal limb (32) connecting the two transverse limbs (31).
[10]
10. Precast track part according to claim 9,characterized in that the extension wall part (29) has a U-shaped or V-shaped shape in a plan view.
[11]
11. Precast track part according to one of claims 8 to 10,characterized in that the installation area (30) is set up to accommodate an installation (33), in particular an electrical installation and / or drainage device.
[12]
12. Precast track part according to claim 11,characterized in that the installation area (30) has an electrical installation (34) and / or a drainage installation (35).
[13]
13. Track body (11) having at least one prefabricated track part (10) according to one of the preceding claims, wherein a rail (16) is arranged in each rail receiving channel (15), which is cast into the rail receiving channel (15) by means of a potting compound (36).
[14]
14. Track body according to claim 13,characterized in that a damping strip (37) is arranged between a rail foot of each rail (16) and the channel bottom (21), which is fastened in the rail receiving channel (15) by the encapsulation (36).
[15]
15. Track body according to claim 13 or 14,characterized in that at least one line (39) and / or at least one pipe (38) is arranged in at least one rail receiving channel (15) adjacent to the rail (16), which is passed through the potting (36) in the rail receiving channel (15 ) is attached.
[16]
16. Track body according to one of claims 13 to 15,characterized in that the inner wall element (18) and the outer wall element (17) of a common rail receiving channel (15) form at least one installation area (30) widened in the transverse direction (Q), in which an installation (33) is arranged and through the potting ( 36) is attached.
[17]
17. Track body according to claim 16,characterized in that the installation (33) has an electrical installation (34) and / or a drainage installation (35).
[18]
18. Track body according to one of claims 13 to 17,characterized in that the at least one concrete body (12) of the respective precast track part (10) is covered by an asphalt covering layer (45).
[19]
19. Track body according to claim 18,characterized in that an asphalt binder layer (44) is arranged on the at least one concrete body (12) between the asphalt cover layer (45) and the at least one concrete body (12).
[20]
20. Track body according to claim 19,characterized in that the asphalt binder course (44) is in direct contact with the asphalt surface course (45) and the at least one concrete body (12).
[21]
21. Track body according to one of claims 18 to 20,characterized in that in the transverse direction (Q) adjacent to the at least one concrete body (12) there is an asphalt base layer (43) on which the asphalt cover layer (45) and / or the asphalt binder layer (44) are arranged.
类似技术:
公开号 | 公开日 | 专利标题
EP2659068A1|2013-11-06|Method for producing a slab trackway
DE202017003614U1|2018-10-09|Fixed carriageway and covering element for a slab track
DE102004019083A1|2004-12-16|Method for laying rail track on uneven ground especially in tunnels using integral alignment means which are removed after the sleepers are secured with poured concrete
DE10004194C2|2002-04-18|Process for the production of a fixed railroad track on a bridge
CH714161B1|2021-11-15|Prefabricated track part and track body with at least one prefabricated track part.
DE4308748A1|1994-04-21|Composite railway platform for passenger trains and tramways - consists of prefab. sections and support plates with legs, corresp. to walking surface
DE19627468A1|1997-01-16|Grooved rail for tram track embedded in street - is enclosed by polyurethane reaction mixture introduced into formwork
AT413553B|2006-03-15|RAIL VEHICLE RAIL AND METHOD FOR PRODUCING A JOURNEY
EP3075908A1|2016-10-05|Slotted channel
EP3369862B1|2020-04-15|Gutter element for forming a drainage channel
EP1939357A1|2008-07-02|Flat overhang above ground level as walkway or driveway, in particular platform
EP2800833B1|2016-07-20|Slab track
DE202013103285U1|2013-09-12|Dilatation and contraction joints in concrete traffic areas
EP1830002B1|2010-05-26|Track structure adapted for tramways
AT402413B|1997-05-26|DEVICE FOR SECURING A ROAD CHANNEL PASSAGE
EP2295635A2|2011-03-16|Rail bearing with covers for flexible bus section and method for producing same
DE3531117A1|1987-03-12|Slab-laying system
DE4326306C2|2000-09-21|Track crossing plate with track groove cover
AT375699B|1984-08-27|RAIL ARRANGEMENT, IN PARTICULAR FOR TRAMWAY TRACKS
DE19920075A1|2000-12-07|Rail mounting system comprises profiles which support rail on each side and rail bed with ramp section contacting one profiles, third profile contacting other profile and other side of rail bed and being fastened to bed with bolts
DE102016208028A1|2017-11-16|Carrier screed and Randwegkonstruktion
DE10015394A1|2001-09-13|Connecting layer for renovation of worn road surfaces involves building steel mats laid over entire affected area, welded at joints in cross and longitudinal directions and fixed by ground nails
DE2119250C|1973-03-15|Edge seal for a deck slab
DE10251110A1|2004-05-19|Roadway slab esp. for temporary roads for road construction vehicles and similar, consists of transverse profiled parts with concave cross sections, and cover strips for cross sections and intermediate gaps to increase load bearing
EP2692950A2|2014-02-05|Component for the erection of mobile guard barriers on roadways
同族专利:
公开号 | 公开日
DE202017105401U1|2017-09-29|
CH714161A2|2019-03-15|
引用文献:
公开号 | 申请日 | 公开日 | 申请人 | 专利标题

DE202005020020U1|2005-12-22|2006-02-23|Edilon Gmbh|Transverse force coupling for rail support plates has depression formed on front surface of each rail support plate|
法律状态:
2020-10-15| PFA| Name/firm changed|Owner name: EDILON) (SEDRA GMBH, DE Free format text: FORMER OWNER: EDILON) (SEDRA GMBH, DE |
优先权:
申请号 | 申请日 | 专利标题
DE202017105401.2U|DE202017105401U1|2017-09-07|2017-09-07|Semi-finished track and track with at least one ready-made track|
[返回顶部]