阅读说明：本技术 可安装护轮轨的双块式轨枕 (Double-block sleeper capable of mounting wheel guard rail ) 是由 冯威 魏周春 刘启宾 张岷 于鹏 刘杰 褚卫松 常卫华 苏成光 刘超 张高扬 于 2021-08-10 设计创作，主要内容包括：本发明为一种可安装护轮轨的双块式轨枕,其克服了现有技术中防脱护轨的零部件较多,安装、维护不便、质量控制难度大的问题,实现针对现有双线并行且铺设双块式无砟轨道地段防止列车脱轨侵入临线限界的需求。本发明包括标准块和异形块,异形块在标准块的基础上向中心线方向延长块的长度,标准块为钢筋混凝土结构,标准块和异形块上分别设置有钢筋桁架,标准块内设置有结构钢筋和挡肩抗裂钢筋,基本轨预埋套管垂直于标准块承轨台布置,异形块内设置有结构钢筋和异形块挡肩抗裂钢筋,异形块内预埋有护轮轨预埋套管。(The invention discloses a double-block sleeper capable of being provided with a guard rail, which solves the problems of more parts, inconvenience in installation and maintenance and high quality control difficulty of an anti-drop guard rail in the prior art, and meets the requirement of preventing train derailing from invading an adjacent line limit in the prior double-line parallel and double-block ballastless track laying field. The invention comprises a standard block and a special-shaped block, wherein the special-shaped block prolongs the length of the block towards the direction of a central line on the basis of the standard block, the standard block is of a reinforced concrete structure, a steel bar truss is respectively arranged on the standard block and the special-shaped block, a structural steel bar and a shoulder-blocking anti-cracking steel bar are arranged in the standard block, a basic rail embedded sleeve is arranged perpendicular to a standard block rail bearing platform, the structural steel bar and the shoulder-blocking anti-cracking steel bar of the special-shaped block are arranged in the special-shaped block, and a wheel-protecting rail embedded sleeve is embedded in the special-shaped block.)

1. A double-block sleeper capable of installing a wheel guard rail is characterized in that: including standard block (1) and dysmorphism piece (2), the length of dysmorphism piece (2) to central line direction extension piece on the basis of standard block (1), the standard block is reinforced concrete structure, be provided with steel bar truss (3) on standard block (1) and dysmorphism piece (2) respectively, be provided with structural reinforcement (6) and keep off shoulder anti-crack reinforcing bar (5) in standard block (1), stock rail embedded sleeve pipe (4) perpendicular to standard block support rail platform is arranged, be provided with structural reinforcement (6) and dysmorphism piece in the dysmorphism piece (2) and keep off shoulder anti-crack reinforcing bar (7), pre-buried wheel rail embedded sleeve pipe (8) of protecting in dysmorphism piece (2).

2. The dual block tie mountable trailing rail according to claim 1 wherein: the steel bar truss (3) comprises an upper chord (9) and two lower chords (10), and the upper chord (9) is connected with the lower chord (10) through a web rib (11) or an inclined strut.

3. The wheelguard mountable dual block sleeper of claim 1 or 2, wherein: the diameter of the structural steel bar (6) is 6-12 mm, and the structural steel bar and the upper chord member of the steel bar truss (3) form an upper-layer steel bar cage structure and a lower-layer steel bar cage structure.

4. The dual block tie mountable trailing rail according to claim 3 wherein: the shoulder-blocking anti-cracking steel bar (5) or the special-shaped block (2) is in an M shape, the left side and the right side of the shoulder-blocking anti-cracking steel bar (7) are distributed at the shoulder-blocking position of the standard block (1) or the special-shaped block (2), and the rail-bearing platform of the standard block (1) or the special-shaped block (2) is distributed at the lower layer of the standard block (1) or the special-shaped block.

5. The dual block tie mountable trailing rail according to claim 4 wherein: the extension length of the special-shaped block is 150 mm-300 mm.

6. The dual block tie mountable trailing rail according to claim 5 wherein: the center distance between the wheel guard rail embedded sleeve (8) and the adjacent stock rail embedded sleeve (4) is not less than 190 mm.

7. The dual block tie mountable trailing rail according to claim 6 wherein: the diameters of the upper chord (9), the lower chord (10) or the web bars (11) are 6-12 mm.

8. The dual block tie mountable trailing rail according to claim 7 wherein: the diameter of the structural steel bar (6) is 6-12 mm.

The technical field is as follows:

the invention belongs to the field of rail engineering, and relates to a double-block sleeper capable of mounting a wheel guard rail, which is suitable for laying a double-block ballastless track and has a requirement for preventing a train from derailing.

Background art:

the wheel guard rail is a train derailment protection device, is usually arranged in the fields of bridges, high slope subgrades and the like of low-grade lines, and is mainly used for preventing serious casualty accidents caused by the fact that trains rush out of the lines after derailment and fall off from the bridges and the high slope subgrades. For high-grade lines, the anti-collision walls are arranged on two sides of the bridge, so that wheel protecting rails are not needed. However, when the train derailment accidents occurred in recent years are combined, once the train breaks into the critical line limit after the double-line parallel section derailment, the critical line train and the derailed train collide with each other, and the secondary accidents are more serious than the traditional single train accidents. Therefore, in order to reduce serious casualty accidents caused by the fact that the train breaks into the critical line limit after derailing, the anti-drop guard rail is required to be arranged in the double-line parallel section.

Ballastless tracks are generally adopted for long and large tunnels and tunnel group sections of high-speed railways or common-speed railways, and double-block ballastless tracks are the most widely applied ballastless track structures in China at present due to excellent economy, mature technology and convenience in construction. In a ballastless track section, the currently adopted wheel guard rail setting schemes are three, and the three schemes are as follows:

1) novel anti-drop guard rail

This kind of anticreep guardrail passes through fixture and directly installs anticreep guardrail on the stock rail, and the main problem that exists is that the spare part of anticreep guardrail is more, and installation, maintenance are inconvenient, and can influence conventional work such as rail is polished, fastener maintenance, are unfavorable for fortune dimension.

2) Adopts a direct-buried sleeve on the ballast bed plate

The scheme is that the direct-buried sleeve is embedded when the ballast bed slab is poured, and the main problems of large workload of the cast-in-place direct-buried sleeve and large difficulty in quality control exist, the sleeve is easy to lose efficacy, and the direct-buried sleeve is only suitable for being adopted in small sections of special sections.

3) By means of special sleepers or the like in the transition section

The technical scheme is that a through long reinforced concrete sleeper is adopted, and an embedded sleeve is arranged on the sleeper, so that the main problems that a new and old concrete combining surface of the sleeper and a cast-in-place concrete track bed is large, a gap is easy to appear, the area of the sleeper bottom is large, the vibrating difficulty is large after concrete pouring of the track bed, and a cavity is easy to appear are solved.

The invention content is as follows:

the invention aims to provide a double-block sleeper capable of being provided with a guard rail, which solves the problems of more parts, inconvenience in installation and maintenance and high quality control difficulty of an anti-drop guard rail in the prior art, and meets the requirement of preventing train derailing from invading a critical line limit by aiming at the existing double-line parallel and double-block ballastless track laying section.

In order to achieve the purpose, the invention adopts the technical scheme that:

a double-block sleeper capable of installing a wheel guard rail is characterized in that: the wheel rail embedded sleeve comprises a standard block and a special-shaped block, wherein the special-shaped block extends the length of the block to the direction of a central line on the basis of the standard block, the standard block is of a reinforced concrete structure, steel bar trusses are respectively arranged on the standard block and the special-shaped block, structural steel bars and shoulder-blocking anti-cracking steel bars are arranged in the standard block, a basic rail embedded sleeve is perpendicular to a standard block rail bearing platform and is arranged, the structural steel bars and the shoulder-blocking anti-cracking steel bars are arranged in the special-shaped block, and a wheel rail embedded sleeve is embedded in the special-shaped block.

The steel bar truss comprises an upper chord and two lower chords, and the upper chord and the lower chords are connected by web bars or inclined struts.

The diameter of the structural steel bar is 6-12 mm, and the structural steel bar and the upper chord member of the steel bar truss form an upper-layer steel bar cage structure and a lower-layer steel bar cage structure.

The shoulder-blocking anti-cracking steel bar or the special-shaped block shoulder-blocking anti-cracking steel bar is M-shaped, the left side and the right side of the shoulder-blocking anti-cracking steel bar are distributed at the shoulder-blocking position of the standard block or the special-shaped block, and the rail-bearing platform of the standard block or the special-shaped block is distributed at the lower layer of the standard block or the special-shaped block.

The extension length of the special-shaped block is 150 mm-300 mm.

The center distance between the wheel guard rail embedded sleeve and the adjacent basic rail embedded sleeve is not less than 190 mm.

The diameters of the upper chord, the lower chord or the web bars are 6-12 mm.

The diameter of the structural steel bar is 6-12 mm.

Compared with the prior art, the invention has the following advantages and effects:

1. the invention provides a method for setting a wheel protecting rail of a double-block type ballastless track, aiming at the requirement of preventing train derailment from invading an approaching line limit in the existing double-line parallel and double-block type ballastless track laying field and combining the technical problems of the existing wheel protecting rail setting scheme of the ballastless track. The method can effectively solve the technical problem of arranging the wheel guard rail on the ballastless track, and has an important function of preventing the derailment of the train from invading the critical line clearance of the double-line parallel section.

2. The wheel guard rail mounting platform is arranged in a mode of prolonging the step length of a sleeper block on one side of the double-block sleeper and reasonably determining the step elevation based on operation and maintenance requirements and wheel guard rail mounting technical requirements on the basis of the condition that the interface relation between the conventional double-block sleeper and a fastener is not changed, and sleeves for fixing the wheel guard rail are pre-buried in the platform, so that the wheel guard rail can be conveniently mounted and fixed after a track bed structure is formed. The application of the invention can effectively solve the problem that the train breaks into the adjacent line clearance after derailing, can not change the interface relation between the track structure and the off-line foundation, track components and the like, can not increase the types of the track structure and the components in the two-line parallel section, is beneficial to maintenance and material preparation in the operation period, and is particularly suitable for the conditions of high occupation ratio and more detour sections of the ultra-long tunnel in the complex and difficult mountain area.

3. The smaller the clear distance between the wheel guard rail and the stock rail is, the better the protection effect on train derailment is, but the smaller the clear distance can influence the routine maintenance operations such as adjustment, oiling, large-scale mechanical flaw detection and polishing of a ballastless track fastener system. According to the invention, by reasonably limiting the distance between the wheel guard rail and the embedded sleeve of the stock rail, the protection effect of the wheel guard rail on the train derailed can be furthest ensured on the premise of avoiding the influence of the wheel guard rail on the routine maintenance operation of the ballastless track.

4. The wheel guard rail is fixed on the ballastless track bed sleeper block formed by pouring by adopting the connection between the fastener bolt and the embedded sleeve, the connection mode is simple and convenient, the number of parts is small, the installation is simple and convenient, and the wheel guard rail can be implemented after the ballastless track is formed and the track is paved, so that the wheel guard rail has no influence on the ballastless track bed and the track paving operation, and the guarantee of the track paving period is facilitated.

5. According to the invention, on the premise of considering the requirement of installing the wheel-protecting track, the condition that the bonding surface of new and old concrete between the sleeper and the cast-in-place concrete track bed is overlarge can be avoided by reasonably controlling the step extension size, and the truss reinforcing steel bars are arranged at the lower part of the sleeper block and between the left and right sleeper blocks, and the integrity and the stability of the connection between the sleeper block and the cast-in-place concrete track bed can be obviously enhanced by reasonably combining and connecting the truss reinforcing steel bars connected on the sleeper block and the structural reinforcing steel bars in the track bed, and the generation of new and old concrete separation defects can be reduced to the maximum extent.

6. The M-shaped anti-crack steel bar for the shoulder block is arranged at the shoulder block of the sleeper, so that the structural resistance of the shoulder block of the sleeper can be obviously improved, the safety and the stability of the structure are ensured, and the sleeper anti-crack steel bar has good adaptability to the condition of heavy axles of the passenger-cargo collinear railways.

Description of the drawings:

FIG. 1 is an elevational view of the present invention;

FIG. 2 is a plan view of the present invention;

FIG. 3 is a cross-sectional view of the present invention;

FIG. 4 is a schematic view of the present invention mounting stock rails and wheelguard rails;

in the figure, 1, a standard block, 2, a special-shaped block, 3, a steel bar truss, 4, a basic rail embedded sleeve, 5, shoulder-blocking anti-cracking steel bars, 6, structural steel bars, 7, special-shaped block shoulder-blocking anti-cracking steel bars, 8, a wheel-protecting rail embedded sleeve, 9, an upper chord, 10, a lower chord, 11, a web rib, 12, a wheel-protecting rail and 13, the basic rail.

The specific implementation mode is as follows:

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 invention and are not intended to limit the invention.

Referring to fig. 1, 2 and 4, the invention relates to a double-block sleeper capable of installing a wheel guard rail, which comprises a standard block 1, a special-shaped block 2, two steel bar trusses 3 and the like, wherein the steel bar trusses 3 are respectively arranged on the standard block 1 and the special-shaped block 2. The standard block 1 is a reinforced concrete structure and comprises a structural steel bar 6, shoulder-blocking anti-cracking steel bars 5, a stock rail pre-embedded sleeve 4, concrete and the like, the structural steel bar 6 and the shoulder-blocking anti-cracking steel bars 5 are arranged in the standard block 1, the diameter of the structural steel bar 6 is 6-12 mm, and the structural steel bar and the upper chord member of the steel bar truss 3 form an upper-lower two-layer steel bar cage structure. Keep off shoulder anti-cracking reinforcing bar 5 and be "M" type, the left and right sides both sides distribute in standard block 1 or dysmorphism piece 2 and keep off shoulder department, and standard block 1 or dysmorphism piece 2 support rail platform punishment distribute in standard block 1 or dysmorphism piece 2 lower floor to improve the anti-fracture performance who keeps off the shoulder, strengthen the durability of sleeper structure. The basic rail embedded sleeves 4 are arranged perpendicular to the rail bearing platform, two standard blocks 1 are embedded, and the size, the type and the embedding position of the standard blocks can be determined according to the type of matched fasteners.

The special-shaped block 2 properly extends the length of the block towards the center line direction on the basis of the standard block 1, the length is extended by 150 mm-300 mm, and two wheel guard rail embedded sleeves 8 are embedded for arranging the wheel guard rails. Structural steel bars 6 and special-shaped block shoulder anti-cracking steel bars 7 are arranged in the special-shaped block 2, and wheel-rail-protecting embedded sleeves 8 are embedded in the special-shaped block 2.

The center distance between the wheel guard rail embedded sleeve 8 and the adjacent stock rail embedded sleeve 4 is not less than 190mm, so that the requirements of maintenance operations such as steel rail polishing, fastener adjustment and the like are met.

Referring to fig. 3, the steel bar truss 3 is composed of an upper chord 9, two lower chords 10 and web ribs 11, the upper chord 9 and the two lower chords 10 are connected together by the web ribs 11, and the web ribs 11 are of a spiral structure or can be connected by inclined struts and welded at the intersection points of the upper chord and the lower chord. The diameters of the upper chord 9, the two lower chords 10 and the web ribs 11 are 6-12 mm.

And after the steel bar truss 3 and the structural steel bars 6 in the sleeper blocks, the shoulder-blocking anti-cracking steel bars 5, the basic rail embedded sleeve 4 and the wheel guard rail embedded sleeve 8 are assembled in a mould, standard block and special-shaped block concrete are poured, and after solidification, a double-block sleeper capable of installing the wheel guard rail is formed, wherein the strength grade of the concrete is C50-C70.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the specification and the drawings of the present invention should be included in the scope of the present invention.