阅读说明：本技术 一种双轨距铁路混凝土轨枕 (Double-track-pitch railway concrete sleeper ) 是由 黄守刚 王瑞 刘成坤 李杨 杨艳 王建西 杜增建 杨晓彤 路佳承 刘晓龙 杜晓宁 于 2021-07-16 设计创作，主要内容包括：本发明涉及铁路技术领域,具体涉及一种双轨距铁路混凝土轨枕,异形的轨枕上表面固定预埋铁座构件,预埋铁座构件中部上表面固定安装铁轨,其中,预埋铁座构件为双肢结构,双肢相邻空腔内设置楔形板；本发明轨枕中的楔形板采用高分子复合材料,有利于提高相邻同一轨道左右两根钢轨之间的绝缘电阻,提高轨道电路的可靠性；楔形板具有一定弹性,有利于降低轮轨冲击力。(The invention relates to the technical field of railways, in particular to a double-track-pitch railway concrete sleeper.A pre-embedded iron seat component is fixed on the upper surface of a special-shaped sleeper, and a rail is fixedly installed on the upper surface of the middle part of the pre-embedded iron seat component, wherein the pre-embedded iron seat component is of a double-limb structure, and wedge plates are arranged in cavities adjacent to the double limbs; the wedge-shaped plate in the sleeper is made of the polymer composite material, so that the insulation resistance between the left steel rail and the right steel rail of the same adjacent track is favorably improved, and the reliability of a track circuit is improved; the wedge-shaped plate has certain elasticity, and is favorable for reducing the impact force of the wheel rail.)

1. A double track gauge railroad concrete sleeper, comprising: the special-shaped sleeper (1) upper surface is fixed with an embedded iron seat component (2), the middle upper surface of the embedded iron seat component (2) is fixedly provided with a rail (3), wherein the embedded iron seat component (2) is of a double-limb structure, and a wedge-shaped plate (24) is arranged in a cavity adjacent to the double limbs.

2. The dual gauge railway concrete tie as claimed in claim 1, wherein: the sleeper (1) is a trapezoidal cross section, an upper layer of steel bar (6) and a lower layer of steel bar a (5) are longitudinally arranged in the sleeper body, and the width of the section of the two sleeper ends of the sleeper (1) is greater than the width of the section of the middle of the sleeper body.

3. The dual gauge railway concrete tie as claimed in claim 1, wherein: the height of two pillow ends of the sleeper (1) is greater than the height of the sleeper body, a layer of steel bar a (6) is arranged in the sleeper (1) body along the length direction of the sleeper (1), and the steel bar a (6) is located at the middle shaft of the sleeper body.

4. The dual gauge railway concrete tie as claimed in claim 1, wherein: a layer of steel bar a (6) is arranged at the middle lower part in the sleeper (1) body along the length direction of the sleeper (1), and a threaded steel bar (4) is arranged at the middle upper part in the sleeper (1) body along the length direction of the sleeper (1) and penetrates through the embedded section of the embedded iron seat component (2) on the upper surface of the sleeper (1).

5. The dual gauge railway concrete tie as claimed in claim 1, wherein: the embedded iron seat component (2) is of a double-limb conjoined structure and mainly comprises an embedded iron seat (20), a stop block (21), a stop block a (22), a ribbed plate (23), a wedge-shaped plate (24), an angle plate (25) and an elastic strip (26); the bottom of the inner middle cavity of the double embedded iron seats (20) is provided with an angle plate (25) for fixing the double embedded iron seats (20), the upper surface of the angle plate (25) is provided with a wedge plate (24), the upper surface of the wedge plate (24) is provided with a rib plate (23), two ends of the rib plate (23) are respectively connected with a stop block (21) and a stop block a (22) on the embedded iron seats (20) at two sides, a rail (3) installed in the middle of the rib plate (23) is fixed in position through the stop block (21) and the stop block a (22), and an elastic strip (26) fastens the stop block (21) and the stop block a (22).

6. The dual gauge railway concrete tie as claimed in claim 1, wherein: the height of the wedge-shaped plate (24) in the embedded iron seat component (2) in the middle of the upper surface of the sleeper (1) body is greater than that of the wedge-shaped plate (24) in the embedded iron seat components (2) on two sides of the sleeper (1) body.

7. The double track gauge railway concrete tie as claimed in claim 5, wherein: the angle plate (25) in the embedded iron seat component (2) is replaced by a deformed steel bar (4), the deformed steel bar (4) penetrates through an embedded section of an embedded iron seat (20) in the sleeper (1) along the length direction of the sleeper, and the deformed steel bar (4) is used for positioning the embedded iron seat (20).

Technical Field

The invention relates to the technical field of double-track-pitch railway tracks, in particular to a double-track-pitch railway concrete sleeper.

Background

In recent years, with the continuous development of national economy of China, the economic exchange with surrounding countries is more and more frequent, and the external trade amount is continuously increased. In international trade transportation of goods, railways are a cheap and efficient transportation mode, and in the example of central european banquet, the annual growth rate is greatly increased by over 50% every year. The method is not suitable for the situation that international railway transportation needs to be repeatedly assembled and disassembled and reloaded due to different railway gauges of various countries, time and labor are consumed, the transportation cost is increased, and the competitiveness of products in China is reduced.

In the connection of Chinese railways and meter-gauge railways, 1435mm/1000mm of double-gauge rail-sleeved railway tracks are generally adopted, the double-gauge rail-sleeved railway tracks are used for the collinear operation of 1435mm gauge trains and 1000mm gauge trains, and are suitable for the interconnection and intercommunication of the 1435mm gauge railway tracks and the 1000mm gauge railway tracks, three steel rails are generally asymmetrically laid on the tracks, one steel rail is shared by two trains, and the other two steel rails are not shared. The track is asymmetric left and right, so that the possibility of line instability is increased, and the steel rail is extruded outwards to provide higher resistance requirement for the fastener along the length direction of the sleeper; the steel rail is easier to arch upwards, and higher pulling resistance requirements are provided for the fastener. Because a steel rail is additionally arranged at the position close to the middle of the sleeper, the sleeper also needs to bear larger positive bending moment, a vehicle is required to bear larger negative bending moment when passing through the sleeper, and the insulation between the two steel rails is higher due to the fact that the distance between the steel rails is smaller.

In the prior double-gauge sleeper, the resistance of a rail bed on the sleeper along the length direction of the sleeper is insufficient, the sleeper is not suitable for a railway jointless track, the capacity of a fastener system for buckling and pressing a steel rail is insufficient, the steel rail is difficult to prevent from arching sometimes, and the longitudinal movement of the steel rail and the length direction of the sleeper cannot be prevented sometimes. Adopt traditional pre-buried iron seat as the sleeper of fastener system component part, during its prefabrication, the exciting force because of the concrete vibrates is great and leads to the iron seat to shift easily, and when iron seat displacement was great, the distance deviation between the iron seat exceeded the specified value, caused the sleeper yield to be lower. The sleeper which adopts the anchoring bolt as the component of the fastener system needs larger construction space and installation space, and particularly needs to be provided with a concrete retaining shoulder on the sleeper, thereby further increasing the space requirement. For 1435mm/1000mm double-track-pitch tracks, the distance between two non-common tracks is very small, so that the fastener is difficult to mount, and even the situation that the space between two steel rails cannot meet the mounting requirement of the fastener is generated.

Disclosure of Invention

Aiming at the defects, the invention aims to enhance the middle bearing capacity of the 1435mm/1000mm double-track distance railway sleeper, solve the problem of fastener installation, improve the resistance of a track bed along the length direction of the sleeper and be suitable for seamless lines.

In order to achieve the purpose, the invention provides the following technical scheme:

a dual gauge railroad concrete tie comprising: an embedded iron seat component (2) is fixed on the upper surface of the special-shaped sleeper (1), and a rail (3) is fixedly installed on the upper surface of the middle part of the embedded iron seat component (2); wherein, the embedded iron seat component (2) is of a double-limb structure, and wedge-shaped plates (24) are arranged in cavities adjacent to the double limbs.

The technical scheme of the invention is further improved as follows: the sleeper (1) is a trapezoidal section, an upper layer of steel bar (5) and a lower layer of steel bar a (6) are arranged in the sleeper body along the length direction of the sleeper (1), and the section width of the two sleeper ends of the sleeper (1) is greater than the section width of the sleeper body.

The technical scheme of the invention is further improved as follows: the height of two pillow ends of the sleeper (1) is greater than the height of the sleeper body, a layer of steel bars a (6) is arranged in the sleeper body along the length direction of the sleeper (1), and the steel bars a (6) are located at the middle shaft of the sleeper body.

The technical scheme of the invention is further improved as follows: a layer of steel bar a (6) is arranged at the middle lower part in the sleeper (1) body along the length direction of the sleeper (1), and a threaded steel bar (4) is arranged at the middle upper part in the sleeper (1) body along the length direction of the sleeper (1) and penetrates through the embedded section of the embedded iron seat component (2) on the upper surface of the sleeper (1).

The technical scheme of the invention is further improved as follows: the embedded iron seat component (2) is of a double-limb conjoined structure and mainly comprises an embedded iron seat (20), a stop block (21), a stop block a (22), a ribbed plate (23), a wedge-shaped plate (24), an angle plate (25) and an elastic strip (26); the bottom of the inner middle cavity of the double embedded iron seats (20) is provided with an angle plate (25) for fixing the double embedded iron seats (20), the upper surface of the angle plate (25) is provided with a wedge plate (24), the upper surface of the wedge plate (24) is provided with a rib plate (23), two ends of the rib plate (23) are respectively connected with a stop block (21) and a stop block a (22) on the embedded iron seats (20) at two sides, a rail (3) installed in the middle of the rib plate (23) is fixed in position through the stop block (21) and the stop block a (22), and an elastic strip (26) fastens the stop block (21) and the stop block a (22).

The technical scheme of the invention is further improved as follows: the height of the wedge-shaped plate (24) in the embedded iron seat component (2) in the middle of the upper surface of the sleeper (1) body is greater than that of the wedge-shaped plate (24) in the embedded iron seat components (2) on two sides of the sleeper (1) body.

The technical scheme of the invention is further improved as follows: the angle plate (25) in the embedded iron seat component (2) is replaced by a deformed steel bar (4), the deformed steel bar (4) penetrates through an embedded section of an embedded iron seat (20) in the sleeper (1) along the length direction of the sleeper, and the deformed steel bar (4) is used for positioning the embedded iron seat (20).

Compared with the prior art, the double-track-pitch railway concrete sleeper provided by the invention has the following beneficial effects:

1. the invention provides a double-track-pitch railway concrete sleeper.A wedge-shaped plate in the sleeper is made of a high-molecular composite material, so that the insulation resistance between two adjacent steel rails is favorably improved, and the reliability of a track circuit is improved; the wedge-shaped plate has certain elasticity, and is favorable for reducing the impact force of the wheel rail.

2. The invention provides a double-track-pitch railway concrete sleeper, wherein a pre-embedded iron seat component with a double-limb conjoined structure is adopted in the sleeper, so that the sleeper is not easy to be inclined during installation, and the finished product rate of the sleeper is improved; the upper and lower double-layer steel bars are adopted in the sleeper, so that the cracking of top surface concrete in the sleeper is prevented.

3. The invention provides a double-track-pitch railway concrete sleeper, wherein a series-type embedded iron seat is adopted in the sleeper, the pitch of the iron seats is easy to maintain, and the finished product rate of the sleeper is improved; and meanwhile, the crack resistance of the top surface concrete in the sleeper is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic diagram of a sleeper structure of a double-track-pitch railway concrete sleeper.

Fig. 2 is a schematic structural diagram of a double-track-pitch railway concrete sleeper.

Fig. 3 is a schematic view of a center shaft steel bar structure in a double-track-pitch railway concrete sleeper.

Fig. 4 is a structural schematic diagram of an internal thread steel bar of a double-track-pitch railway concrete sleeper.

Fig. 5 is a schematic structural view of an embedded iron seat member in a double-track-pitch railway concrete sleeper.

Reference numbers in the figures: 1-sleeper; 2-embedded iron seat component, 20-embedded iron seat, 21-stop block, 22-stop block a, 23-ribbed plate, 24-wedge-shaped plate, 25-angle plate and 26-elastic strip; 3-a rail; 4-a deformed steel bar; 5-reinforcing steel bars; 6-reinforcing steel bar a.

Detailed Description

The technical solution of the present invention will be clearly and completely described by the following detailed description. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

As shown in figures 1, 2 and 5, the special-shaped sleeper (1) in the invention is of a trapezoidal section, which is beneficial to improving the vertical resistance of a track, the sleeper (1) adopts a structure with two wide ends and a narrow middle part, the top width of the sleeper end section of the sleeper (1) is 180-fold and 200mm, and the bottom width is 300-fold and 320 mm. The middle section top width of the sleeper (1) sleeper is 145-165mm, the bottom width is 255-275mm, railway ballasts in the sleeper box can be kept favorably, the resistance of a railway bed of the sleeper (1) along the length direction of the sleeper (1) is improved, an upper layer of steel bar (5) and a lower layer of steel bar (6) are usually installed in the sleeper (1) body, the requirements that the position under the rail bears positive bending moment and the position under the sleeper bears negative bending moment are met, a pre-embedded iron seat component (2) is fixed on the upper surface of the sleeper (1), the pre-embedded iron seat component (2) is of a double-limb connected structure and mainly comprises a pre-embedded iron seat (20), a stop block (21), a stop block a (22), a rib plate (23), a wedge plate (24), an angle plate (25) and an elastic strip (26); an angle plate (25) is arranged at the bottom of an inner middle cavity of each double embedded iron seat (20) and used for fixing the double embedded iron seats (20), a wedge-shaped plate (24) is arranged on the upper surface of the angle plate (25), a rib plate (23) is arranged on the upper surface of the wedge-shaped plate (24), two ends of the rib plate (23) are respectively connected with a stop block (21) and a stop block a (22) on the embedded iron seats (20) on two sides, a rail (3) installed in the middle of the upper portion of the rib plate (23) is positioned and fixed through the stop block (21) and the stop block a (22), and an elastic strip (26) fastens the stop block (21) and the stop block a (22); dog (21) and dog a (22) are used for installing rail (3), floor (23) are used for connecting dog (21) and dog a (22) in order to ensure the distance between two dogs, scute (25) are arranged in preventing that pre-buried iron seat (20) from extracting from sleeper (1) when receiving the withdrawal force, wedge plate (24) are used for setting up the rail bottom slope, simultaneously through its orbital level difference of high setting, wedge plate (24) adopt polymer composite, its length equals with sleeper (1) top width, its width equals with the rail bottom width, thickness is 15-35 mm. The wedge-shaped plate in the sleeper is made of a polymer composite material, so that the insulation resistance between two adjacent steel rails is favorably improved, and the reliability of a track circuit is improved; the wedge-shaped plate has certain elasticity, and is favorable for reducing the impact force of the wheel rail. The embedded iron seat component adopts a double-limb conjoined structure, is not easy to be inclined during installation, and improves the finished product rate of the sleeper; the upper and lower double-layer steel bars are adopted in the sleeper, so that the cracking of top surface concrete in the sleeper is prevented.

Example 2

As shown in fig. 3, the present embodiment is different from embodiment 1 in that: the height of two sleeper ends of the sleeper (1) is greater than the height of the sleeper in the body, the top surface of concrete in the sleeper is lower than the top surface of concrete at the position under the rail, the height of the sleeper end of the sleeper (1) is 215-25mm, the height of the sleeper is 180-200mm, a layer of steel bar a (6) is arranged in the sleeper (1) body along the length direction of the sleeper (1), and the steel bar a (6) is positioned at the middle shaft part of the body; compared with the embodiment 1, the scheme cancels the upper layer steel bar, keeps the lower layer steel bar in the middle position of the sleeper, ensures that the stress of the sleeper (1) is in a reasonable range by positioning the centroid of the steel bar a (6) above the neutral axis of the sleeper and positioning the sleeper end, and positioning the centroid of the steel bar below the neutral axis of the sleeper, ensures that the stress of the sleeper (1) is in a reasonable range, ensures that the height of the wedge plate (24) in the embedded iron seat component (2) in the middle of the upper surface of the sleeper (1) body is greater than that of the wedge plate (24) in the embedded iron seat components (2) on two sides of the sleeper (1) body, exposes more of the embedded iron seat (20) of the steel rail in the middle position of the sleeper to the top surface of the sleeper (1), ensures that the top surface of the non-shared rail of the steel rail is the same as the top surface of the shared rail, has larger thickness of the wedge plate (24) below the non-shared rail, namely the height of the non-shared rail of the steel rail is compensated by the thickness of the wedge plate (24) of the wedge plate (10-50 mm) below the non-shared rail, the average thickness of the wedge-shaped plate (24) below the non-shared rail sleeper of the steel rail is 20-80mm, and the thickness of the wedge-shaped plate (24) below the shared rail sleeper (1) is 10-50 mm; other structural components, positional connection relationships, and schemes of this embodiment are the same as those of embodiment 1.

Example 3

As shown in fig. 4, the present embodiment is different from embodiment 1 in that: a layer of steel bar a (6) is arranged at the middle lower part in the body of the sleeper (1) along the length direction of the sleeper (1), and a threaded steel bar (4) is arranged at the middle upper part in the body of the sleeper (1) along the length direction of the sleeper and penetrates through the embedded section of the embedded iron seat component (2) on the upper surface of the sleeper (1); the angle plate (25) in the embedded iron seat component (2) is replaced by a deformed steel bar (4), the deformed steel bar (4) penetrates through an embedded section of an embedded iron seat (20) in the sleeper (1) along the length direction of the sleeper, and the deformed steel bar (4) is used for positioning the embedded iron seat (20); in the embodiment, the embedded iron seat component (2) does not adopt a double-limb conjoined structure any more, but two deformed steel bars (4) are used for positioning the distance between the embedded iron seats (20), the diameter of each deformed steel bar (4) is 6-10mm, the thread pitch is 0.5mm or 1.0mm, each embedded iron seat (20) is provided with a screw hole, the diameter of each screw hole is matched with the diameter of each deformed steel bar (4), the two deformed steel bars (4) pass through the embedded iron seats (20), thereby accurately positioning the positions of the 6 embedded iron seat components (2), applying no prestress on the deformed steel bar (4), but the distance between the pre-buried iron seats (20) takes the retraction amount brought by the prestress applied by the lower layer steel bar into consideration, the deformed steel bar (6) is also used as the upper layer tensile steel bar, and simultaneously the bonding force with the concrete is improved, the serial pre-buried iron seats are adopted in the sleeper, the distance between the iron seats is easy to keep, the finished product rate of the sleeper is improved, and meanwhile, the anti-cracking performance of top surface concrete in the sleeper is improved. Other structural components, positional connection relationships, and schemes of this embodiment are the same as those of embodiment 1.

The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the appended claims.