CN216378947U - Long sleeper suitable for subway - Google Patents
Long sleeper suitable for subway Download PDFInfo
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- CN216378947U CN216378947U CN202122654757.0U CN202122654757U CN216378947U CN 216378947 U CN216378947 U CN 216378947U CN 202122654757 U CN202122654757 U CN 202122654757U CN 216378947 U CN216378947 U CN 216378947U
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Abstract
The utility model discloses a long sleeper suitable for subways, which belongs to the technical field of rail transit, and is characterized in that base plate mounting grooves are formed in the top surfaces of two fastener mounting ends of a concrete sleeper, so that related base plates of a fastener system can be correspondingly embedded into the base plate mounting grooves when the fastener system is mounted, the base plates are prevented from jumping out, and the mounting stability and reliability of fasteners are ensured; and through the corresponding setting of side recess for when the concrete sleeper was installed on the railway roadbed, can effectively increase the area of contact of new and old concrete. The long sleeper suitable for the subway can effectively improve the bonding capacity of new and old concrete when the long sleeper is arranged, prevent interface cracks, ensure the stability of the connection arrangement of the long sleeper and a railway bed, reduce the concrete consumption and the steel bar consumption in the sleeper preparation process, reduce the whole weight of the sleeper structure, reduce the application cost of the long sleeper and the engineering cost of corresponding engineering, and has better practical value and popularization value due to simple structure and simple and convenient arrangement.
Description
Technical Field
The utility model belongs to the technical field of rail transit, and particularly relates to a long sleeper suitable for subways.
Background
At present, ballastless track beds of domestic and foreign rail transit are generally in the forms of a sleeper-free integral track bed, a short sleeper integral track bed and a long sleeper integral track bed. The construction method of the sleeper-free integral ballast bed is complicated and has poor construction precision; the short sleeper type integral track bed track has poor capability of keeping geometric shapes and positions (gauge and rail bottom slope), the rail bottom slope and the superelevation of two short sleepers need to be adjusted simultaneously, the construction adjustment amount is large, and the construction precision is low. Compared with the prior art, the long sleeper type integral ballast bed has high construction precision and strong track stability, and becomes the first choice for designing and constructing more and more urban track underground lines.
In the long sleeper type monolithic track bed, the long prestressed concrete sleeper is a key component of the monolithic track bed, is directly related to the service life of the monolithic track bed, and has attracted more and more attention. However, the conventional elastic long sleeper often has the economic problems of large section size, more complicated steel bar manufacturing, low casing installation efficiency, higher cost caused by large steel bar consumption and the like, and also has the problems of interface cracks caused by insufficient bonding capacity of new and old concrete, insufficient stability of the sleeper, inconvenient construction of the sleeper and the like, so that the structural application of the long sleeper has certain limitation.
SUMMERY OF THE UTILITY MODEL
Aiming at one or more of the defects or the improvement requirements in the prior art, the utility model provides the long sleeper suitable for the subway, which can effectively improve the stability of the long sleeper, simplify the preparation process of the long sleeper, reduce the consumption of concrete and reinforcing steel bars and improve the connection reliability of new and old concrete interfaces when the long sleeper is arranged.
In order to achieve the above object, the present invention provides a long sleeper suitable for subways, comprising a concrete sleeper whose both lateral ends are fastener installation ends respectively,
a backing plate mounting groove is formed in the top surface of the fastener mounting end corresponding to the fastener system for embedding a corresponding backing plate in the fastener system; the bottom surface of the backing plate mounting groove is provided with a plurality of embedded sleeves for connecting and mounting a fastener system; and is
Lateral grooves are formed in the end faces of the two transverse sides and/or the end faces of the two longitudinal sides of the concrete sleeper and are used for increasing the contact area of new and old concrete when the concrete sleeper is installed; and
the concrete sleeper is transversely provided with a preformed hole penetrating through two transverse end faces of the concrete sleeper, and a prestressed tendon is arranged in the preformed hole; and the longitudinal two end surfaces of the concrete sleeper are respectively provided with a bar penetrating hole along the longitudinal direction in a coaxial way for the passing of the rail bed steel bar when the concrete sleeper is installed.
As a further improvement of the utility model, a plurality of hoop reinforcements in a ring shape are arranged in the concrete sleeper; and the stirrups are arranged in the fastener mounting end at intervals along the transverse direction of the sleeper.
As a further improvement of the utility model, the preformed holes are arranged in a plurality of rows at intervals in the vertical direction, and the preformed holes in each row of the preformed holes are respectively arranged in a plurality of rows at intervals in the longitudinal direction along the pillow.
As a further improvement of the utility model, the end surfaces of the two transverse sides of the concrete are respectively provided with a side groove, and the side grooves penetrate through the two longitudinal sides of the concrete sleeper.
As a further improvement of the utility model, the height of the fastener mounting end is higher than that of the middle straight section of the concrete sleeper, and the fastener mounting end is connected with the middle straight section through an inclined plane.
As a further improvement of the utility model, the bottom of the backing plate mounting groove is provided with a water drainage hole communicated with the inclined surface, and the water drainage hole is communicated with one end of the backing plate mounting groove and is higher than the other end of the backing plate mounting groove, so that accumulated water in the backing plate mounting groove can be drained.
As a further improvement of the utility model, the inclined plane is provided with a drainage groove which penetrates through at least one longitudinal side surface of the concrete sleeper corresponding to the drainage hole and is used for quickly draining accumulated water in the drainage hole.
As a further improvement of the utility model, the rib penetrating hole is a horn-shaped hole with a large inner diameter outside and a small inner diameter, and the two coaxially arranged rib penetrating holes are respectively connected by end parts with small inner diameters.
As a further improvement of the utility model, the bottom of the concrete sleeper is provided with a plurality of limiting grooves for limiting the longitudinal and transverse displacement of the concrete sleeper.
As a further improvement of the utility model, the concrete strength grade of the concrete sleeper is C60;
and/or
The opening width of the side groove is 30 mm;
and/or
The diameter of the prestressed tendon is 6.25 mm.
The above-described improved technical features may be combined with each other as long as they do not conflict with each other.
Generally, compared with the prior art, the technical scheme conceived by the utility model has the following beneficial effects:
(1) according to the long sleeper suitable for the subway, the backing plate mounting grooves are formed in the top surfaces of the two fastener mounting ends on the transverse direction of the concrete sleeper, so that the related backing plates of the fastener system can be correspondingly embedded into the backing plate mounting grooves when the fastener system is mounted, the backing plates are prevented from jumping out, and the mounting stability and reliability of the fastener are ensured; and through the corresponding arrangement of the side surface grooves, when the concrete sleeper is installed on a railway bed, the contact area of new and old concrete can be effectively increased, the reliability and stability of the arrangement of the concrete sleeper are ensured, and the subsequent maintenance of the sleeper structure is reduced.
(2) According to the long sleeper suitable for the subway, the self weight of the sleeper can be effectively reduced, the using amount of concrete in the sleeper preparation process is reduced, the application strength of the long sleeper structure is ensured, and the preparation cost is saved.
(3) According to the long sleeper suitable for the subway, the size and the number of the prestressed tendons in the concrete sleeper are correspondingly optimized, and the corresponding optimization of the arrangement number and the arrangement position of the stirrups is matched, so that the using amount of steel bars in the preparation process of the long sleeper can be effectively saved, and the preparation cost and the engineering cost of the long sleeper structure are further reduced.
(4) According to the long sleeper suitable for the subway, disclosed by the utility model, through the corresponding arrangement of the drain holes and the drainage grooves in the base plate mounting groove, the accumulated water in the base plate mounting groove can be quickly discharged, the corrosion of a fastener system caused by long-time accumulation of the accumulated water is avoided, the reliability and the stability of the arrangement of the fastener system are ensured, the application cost of the fastener is prolonged, and the maintenance cost of a track system is reduced.
(5) According to the long sleeper suitable for subways, the reinforcement penetrating holes are formed in the mode that the inner diameter is larger outside and the inner diameter is smaller, so that the demoulding of the concrete sleeper during the preparation can be facilitated, the preparation process of the concrete sleeper is simplified, the pouring speed of concrete when the concrete sleeper is arranged on a track bed is effectively improved, the concrete pouring density in the reinforcement penetrating holes is improved, and the stability and the reliability of the arrangement of the concrete sleeper are ensured.
(6) The long sleeper suitable for the subway can effectively improve the bonding capacity of new and old concrete when the long sleeper is arranged, prevent interface cracks, ensure the stability of the connection arrangement of the long sleeper and a railway bed, reduce the concrete consumption and the steel bar consumption in the sleeper preparation process, reduce the whole weight of the sleeper structure, reduce the application cost of the long sleeper and the engineering cost of corresponding engineering, and has better practical value and popularization value due to simple structure and simple and convenient arrangement.
Drawings
Fig. 1 is a schematic structural view of a long sleeper suitable for a subway in the embodiment of the present invention;
fig. 2 is a schematic side view of a long sleeper suitable for a subway in the embodiment of the present invention;
FIG. 3 is a schematic end view of a long sleeper suitable for subways in an embodiment of the present invention;
fig. 4 is a schematic bottom structure view of a long sleeper suitable for a subway in the embodiment of the present invention;
FIG. 5 is a horizontal cross-sectional view of a long sleeper suitable for use in a subway in an embodiment of the present invention;
FIG. 6 is a partial cross-sectional view of a long sleeper suitable for use in a subway in an embodiment of the present invention;
FIG. 7 is an exploded view of a long sleeper suitable for use in a subway in an embodiment of the present invention;
in all the figures, the same reference numerals denote the same features, in particular:
1. a concrete sleeper; 2. a cushion plate mounting groove; 3. pre-burying a sleeve; 4. a water drain hole; 5. a drainage groove; 6. a side groove; 7. reserving a hole; 8. perforating the rib holes; 9. hooping; 10. a limiting groove; 11. and (4) prestressed tendons.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Example (b):
referring to fig. 1 to 7, the long sleeper suitable for the subway in the preferred embodiment of the present invention includes a concrete sleeper 1 having an elongated block structure, the length of the concrete sleeper 1 extends along the transverse direction of the rail when it is installed, and both ends of the transverse direction are installation ends for matching with the fastener system, respectively.
Specifically, the fastener mounting end on the concrete sleeper 1 is respectively provided with a backing plate mounting groove 2 for the embedded mounting of the backing plate in the fastener system. It can be understood that the setting depth of the backing plate mounting groove 2 can be properly adjusted according to the difference of the height of the backing plate, so that the phenomenon of play of the backing plate in the installation and use process can be effectively prevented, and the stability and the reliability of the fastener system and the steel rail are ensured.
Further, the thickness of the two fastener mounting ends in the preferred embodiment is preferably larger than the thickness of the middle portion of the concrete sleeper 1, and the two lateral sides of the top of the fastener mounting ends are respectively provided with a slope form, so that the fastener mounting ends can be reliably transited to the middle portion of the concrete sleeper 1 to form the sleeper structure shown in fig. 1.
Preferably, a drain hole 4, which is preferably a circular hole, is formed in the bottom of the tie plate installation groove 2 and extends to an inclined surface on one side in the lateral direction of the fastener installation end, for example, an inclined surface on one side near the middle of the sleeper as shown in fig. 6. Correspondingly, a drainage groove 5 penetrating at least one side (two sides as shown in fig. 1) of the longitudinal direction of the sleeper is formed on the inclined surface corresponding to the drainage hole and is used for quickly draining accumulated water in the base plate mounting groove 2. Obviously, in order to realize the rapid discharge of accumulated water in the tie plate mounting groove 2, the height of one end of the drainage hole 4 close to the tie plate mounting groove 2 is higher than that of one end communicated with the drainage groove 5 in the preferred embodiment, and the height of one end of the drainage groove 5 communicated with the drainage hole 4 is higher than that of one end of the side surface of the flow-through concrete sleeper 1.
In more detail, a plurality of insert sleeves 3, two as shown in fig. 1, are provided on the bottom surface of each of the mat mounting grooves 2, respectively corresponding to the installation of the fastener system. Simultaneously, correspond in the embedded sleeve 3 and be provided with sleeve pipe spiral muscle, its preferred combination that adopts three vertical bars and spiral muscle sets up the mode, can improve the efficiency of reinforcing bar support and sleeve pipe installation.
Further, lateral grooves 6 are respectively formed on the peripheries (both end faces in the transverse direction and both end faces in the longitudinal direction) of the concrete sleeper 1, as shown in fig. 1. Wherein, the lateral grooves 6 arranged on the two transverse end surfaces penetrate through the two longitudinal end surfaces of the sleeper; and the side grooves 6 opened on both end faces in the longitudinal direction are preferably plural in number at intervals, for example, two as shown in fig. 2. Through the establishment of the side groove 6, the contact area of new and old concrete when the concrete sleeper 1 is arranged for use can be effectively improved, interface cracks are prevented and treated, and the reliability and the stability of the sleeper arrangement are ensured.
Meanwhile, a plurality of limiting grooves 10, for example, two limiting grooves shown in fig. 4 are respectively formed on the bottom surfaces of the two lateral ends of the concrete sleeper 1. The limiting groove 10 is correspondingly formed, so that the whole weight of the sleeper can be reduced, the longitudinal and transverse displacement of the sleeper can be limited, and the stability of the long sleeper structure in setting and using is improved.
Furthermore, a plurality of intervention stress tendons 11 are arranged in the concrete sleeper 1, and reserved holes 7 which penetrate through two transverse end faces of the sleeper are transversely formed on the concrete sleeper 1 corresponding to the respective intervention stress tendons 11. In the preferred embodiment, the preformed holes 7 are two rows, i.e. upper and lower rows as shown in fig. 3, and three preformed holes 7 are provided in each row, which can be used for corresponding arrangement of six prestressed tendons 11. Of course, the number of the preformed holes 7 and the prestressed tendons 11 may be optimized according to the actual setting requirement, and will not be described herein.
In more detail, the tendon 11 in the preferred embodiment is
(diameter) 6.25mm spiral rib steel wire, and the prestressing tendons 11 that are located the outermost are apart from concrete sleeper 1's both sides surface certain distance, ensure that the concrete protective layer of reinforcing bar satisfies minimum thickness requirement, specifically, can be according to the design needsAnd carrying out corresponding determination. Through the corresponding arrangement of the prestressed tendons 11 under the diameter size, the using amount of a single sleeper steel bar is 4.64 kg/sleeper compared with 6 sleeper steel bars
The amount of the reinforcing steel bar is reduced by about 20.3 percent for 5.824kg of reinforcing steel bar per pillow; more than 8
The amount of reinforcing steel bars is reduced by about 34.6 percent for 7.092kg of reinforcing steel bars per pillow. Obviously, by means of the arrangement, the using amount of the steel bars in the sleeper can be effectively reduced, and the comprehensive cost of the sleeper is reduced.
In addition, stirrups 9 are also arranged inside the concrete sleeper 1, as shown in fig. 5 and 7, the stirrups 9 preferably having a square ring structure, and each stirrup 9 preferably lying in a vertical plane extending in the longitudinal direction. Also, the stirrups 9 in the preferred embodiment are a plurality of spaced apart tie members, such as 8 spaced apart as shown in FIG. 7. In the preferred embodiment, the stirrup 9 is preferably arranged in the fastener mounting end on the sleeper, and the straight section in the middle of the sleeper is not arranged, so that the application of steel materials can be reduced on the basis of ensuring the setting strength of the sleeper, and the cost is saved.
It is further preferred that the stirrups 9 at both lateral ends of the sleeper are preferably arranged closely as shown in fig. 7, whereby the structural strength and reliability of both lateral ends of the concrete sleeper 1 are sufficiently ensured. Obviously, according to the actual setting requirement, the stirrups 9 at the ends of the sleepers may not be disposed closely, but disposed at a smaller distance, which is not described herein.
Obviously, when actually setting up, need ensure that structures such as stirrup 9, preformed hole 7, prestressing tendons 11 and buried sleeve 3 set up mutually noninterfere, this can be realized through optimizing prestressing tendons 11 setting position, preferably setting up stirrup 9 size and setting up the position, do not describe here any more.
Further, as shown in fig. 2 and 5, the concrete sleeper 1 has longitudinal bar passing holes 8 formed in both end surfaces thereof in the longitudinal direction, and preferably, a plurality of bar passing holes 8 are formed in each end surface. By utilizing the corresponding arrangement of the reinforcement through holes 8, the connection between the concrete sleeper 1 and the track bed and the inflow of concrete can be accurately realized, and the concrete sleeper 1 can form an integral structure with post-cast concrete on the periphery of the concrete sleeper 1. During actual setting, the through-reinforcement holes 8 formed in the two longitudinal sides of the concrete sleeper 1 are preferably arranged coaxially, so that when the concrete sleeper 1 is correspondingly arranged, the reinforcing steel bars for fixing the sleeper can penetrate through the two longitudinal sides of the sleeper.
More specifically, the lacing holes 8 opened on the side of the sleeper in the preferred embodiment are in the form of trumpet holes having a large outside and a small inside, and the two coaxially arranged lacing holes 8 communicate at the middle of the sleeper with the end portion having the smallest inside diameter, as shown in fig. 5. The arrangement of the rib penetrating holes 8 can simplify the arrangement of the rib penetrating holes 8 and facilitate the demoulding of the mould; on the other hand, the concrete at the reinforcing bar penetrating position can flow into the reinforcing bar penetrating hole conveniently and quickly, and the concrete compactness in the reinforcing bar penetrating hole 8 is improved. Preferably, the outside aperture of each lacing hole 8 is 75mm, and the innermost aperture is 60 mm.
More specifically, the concrete sleeper 1 in the preferred embodiment is configured to have a structure with a narrow top and a wide bottom, that is, the cross section of the concrete sleeper 1 is in a trapezoidal structure as shown in fig. 3, the upper width of the concrete sleeper 1 is preferably 230mm from 250mm of the existing sleeper, and the lower width of the concrete sleeper is optimized to 260mm from 280mm of the existing sleeper, so that the secondary bonding surface of the valley with the concrete of the track bed can be reduced, and the manufacturing cost of the sleeper (the concrete usage is reduced by more than 10%) can be saved.
Meanwhile, the concrete strength grade of the concrete sleeper 1 in the preferred embodiment is preferably C60, and its length is preferably 2100 mm. Secondly, the positive bending moment load value of the static load anti-cracking strength of the sleeper is preferably as follows: 100kN below the rail and 60kN in the sleeper; and the pullout resistance of the insert sleeve 3 is preferably not less than 100 kN. In addition, the side grooves that are preferably cut on the periphery of the concrete sleeper 1 in the preferred embodiment are preferably 30mm wide grooves.
The long sleeper suitable for the subway has the advantages of being simple in structure and simple and convenient to set, being capable of effectively improving the bonding capacity of new concrete and old concrete when the long sleeper is set, preventing interface cracks from appearing, ensuring the stability of connection setting of the long sleeper and a railway bed, reducing the concrete consumption and the steel bar consumption in the sleeper preparation process, reducing the overall weight of the sleeper structure, reducing the application cost of the long sleeper and the engineering cost of corresponding engineering, and having good practical value and popularization value.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the utility model, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A long sleeper suitable for subways comprises a concrete sleeper with fastener mounting ends at the two transverse ends respectively, and is characterized in that,
a backing plate mounting groove is formed in the top surface of the fastener mounting end corresponding to the fastener system for embedding a corresponding backing plate in the fastener system; the bottom surface of the backing plate mounting groove is provided with a plurality of embedded sleeves for connecting and mounting a fastener system; and is
Lateral grooves are formed in the end faces of the two transverse sides and/or the end faces of the two longitudinal sides of the concrete sleeper and are used for increasing the contact area of new and old concrete when the concrete sleeper is installed; and
the concrete sleeper is transversely provided with a preformed hole penetrating through two transverse end faces of the concrete sleeper, and a prestressed tendon is arranged in the preformed hole; and the longitudinal two end surfaces of the concrete sleeper are respectively provided with a bar penetrating hole along the longitudinal direction in a coaxial way for the passing of the rail bed steel bar when the concrete sleeper is installed.
2. The long sleeper suitable for subway according to claim 1, wherein said concrete sleeper is provided therein with a plurality of stirrups in a ring shape; and the stirrups are arranged in the fastener mounting end at intervals along the transverse direction of the sleeper.
3. The long sleeper suitable for subways as recited in claim 1, wherein the reserved holes are formed in a plurality of rows at intervals in the vertical direction, and the reserved holes in each row of the reserved holes are respectively formed in a plurality of rows at intervals in the longitudinal direction along the sleeper.
4. The long sleeper suitable for subways as recited in claim 1, wherein lateral grooves are respectively formed on both lateral end surfaces of said concrete, and said lateral grooves penetrate through both longitudinal sides of said concrete sleeper.
5. The long sleeper suitable for the subway according to claim 1, wherein said fastener mounting end is higher than the straight section of the middle of said concrete sleeper, and said fastener mounting end and said straight section of the middle are connected by an inclined plane.
6. The long sleeper suitable for subways as claimed in claim 5, wherein a drain hole communicated with the inclined surface is formed in the bottom of the tie plate mounting groove, and the drain hole is communicated with one end of the tie plate mounting groove and is higher than the other end of the tie plate mounting groove for draining accumulated water in the tie plate mounting groove.
7. The long sleeper suitable for subways as recited in claim 6, wherein a drainage groove penetrating through at least one longitudinal side surface of the concrete sleeper is formed in the inclined surface corresponding to the drainage hole, and is used for quickly draining accumulated water in the drainage hole.
8. The long sleeper suitable for subways as claimed in any one of claims 1 to 7, wherein the rib penetrating holes are horn-shaped holes with an inner diameter larger outside and an inner diameter smaller inside, and the two coaxially arranged rib penetrating holes are respectively connected by end portions with a smaller inner diameter.
9. The long sleeper suitable for the subway according to any one of claims 1 to 7, wherein a plurality of limiting grooves are formed in the bottom of the concrete sleeper and used for limiting the longitudinal and transverse displacement of the concrete sleeper.
10. The long sleeper suitable for subways as claimed in any one of claims 1 to 7, wherein the concrete strength grade of the concrete sleeper is C60;
and/or
The opening width of the side groove is 30 mm;
and/or
The diameter of the prestressed tendon is 6.25 mm.
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| CN202122654757.0U CN216378947U (en) | 2021-11-01 | 2021-11-01 | Long sleeper suitable for subway |
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| CN202122654757.0U CN216378947U (en) | 2021-11-01 | 2021-11-01 | Long sleeper suitable for subway |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024077669A1 (en) * | 2022-10-09 | 2024-04-18 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Embedded sleeper for ballastless track |
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2021
- 2021-11-01 CN CN202122654757.0U patent/CN216378947U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024077669A1 (en) * | 2022-10-09 | 2024-04-18 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Embedded sleeper for ballastless track |
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