CN219117851U - Three-dimensional reinforcing apparatus of high-speed railway ballastless track sleeper - Google Patents
Three-dimensional reinforcing apparatus of high-speed railway ballastless track sleeper Download PDFInfo
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- CN219117851U CN219117851U CN202222800872.9U CN202222800872U CN219117851U CN 219117851 U CN219117851 U CN 219117851U CN 202222800872 U CN202222800872 U CN 202222800872U CN 219117851 U CN219117851 U CN 219117851U
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Abstract
The utility model discloses a three-dimensional reinforcing device for a sleeper of a ballastless track of a high-speed railway, which comprises a claw-type steel frame, self-locking bolts and a planted bar anchor. The utility model solves the practical problems that the existing reinforcing device can not realize the transverse, longitudinal and vertical three-dimensional reinforcement, is not suitable for the reinforcing requirement of the strip sleeper structure and the like, and is suitable for the structural reinforcement during the replacement or emergency repair of the ballastless track sleeper and the switch sleeper of the high-speed railway.
Description
Technical Field
The utility model relates to the technical field of maintenance of ballastless tracks of high-speed railways, in particular to a three-dimensional reinforcing device for ballastless track sleepers of high-speed railways.
Background
The turnout is a weak link of a high-speed railway track structure and a key device for limiting the passing speed of a train. The turnout area ballastless track structure is divided into a sleeper embedded type ballastless track and a turnout area plate type ballastless track, wherein the sleeper embedded type ballastless track structure is a turnout area ballastless track structure which is widely applied in China. The turnout long sleeper embedded ballastless track structure consists of turnout steel rail parts, fasteners, turnout sleepers, a turnout bed board, a concrete supporting layer/bed board and the like from top to bottom. The concrete sleeper in the turnout area is used as an important component of the turnout structure, on one hand, the load of the train borne by the turnout steel rail parts is transferred to the lower foundation, and on the other hand, the track gauge, the direction, the geometric shapes of high and low tracks in the turnout area are maintained, and the service state has great influence on the whole turnout system.
With the increase of the service time, the damage of the ballastless track individual sleeper of part of the line turnout area is already displayed. Once the tie failure reaches the failure level, the failed tie needs to be replaced. Currently, sleeper replacement during operation requires two skylights to complete. The first skylight completes the chiseling of the concrete of the track bed around the sleeper, and the second skylight completes the replacement of the switch sleeper and the restoration of the concrete of the track bed. When the concrete of the track bed around the sleeper is chiseled, the sleeper loses the restraint and limit functions of the concrete of the track bed around, and the passing requirement of the high-speed train in the next day cannot be met. In order to prevent the sleeper from generating displacement, railway ballasts are filled around the sleeper, and temporary reinforcement is carried out on the sleeper to be replaced. However, the method adopts a mode similar to the reinforcement of the sleeper of the ballastless track, so that the workload of paving and recycling the railway ballasts is high, the original stress structure of the ballastless track is changed, and the influence on the track structure is large. Therefore, the speed limit is generally 80km/h during the renovation period, and the line operation is greatly disturbed.
CN203654109U proposes a track slab laying positioning frame, which is mainly used for preventing the track slab from floating upwards when mortar is poured, and cannot meet the requirements of transverse and longitudinal limiting of the switch tie; CN206553829U and CN104389249a respectively propose a compressing and limiting device for an assembled high-speed rail ballastless track slab, and the two devices can only realize vertical compression, and also cannot meet the requirements of transverse and longitudinal limiting of a switch tie, and cannot be suitable for mounting the switch tie; CN 108004855B proposes a compressing and limiting device and method for a slab ballastless track structure, the device is suitable for the slab ballastless track structure and is not suitable for reinforcing the sleeper structure of a cast-in-situ ballast bed ballastless track. Filling and compressing the bottom cavity of the limiting device in a grouting and leveling mode of the filling bag, and being applicable to the plane structures such as a base plate/a supporting layer and the like, and not applicable to leveling of a concrete chiseling surface of a ballast bed. Meanwhile, the device can only realize vertical compression and horizontal limiting, and cannot meet the requirement of vertical limiting.
Generally, at present, the track slab reinforcing device is applied to the renovation construction of a slab ballastless track structure, but the field of sleeper three-dimensional reinforcement is still blank, and the following problems mainly exist in the application of the existing reinforcing device:
1. the existing reinforcing device is mainly designed for buckling and limiting a plate-type ballastless track plate, needs to be assembled on line, and cannot meet the reinforcing requirement of a long-strip sleeper structure;
2. the vertical direction of the buckling track structure is mainly used, the horizontal limit is auxiliary, and the longitudinal limit function of the track structure cannot be realized;
3. the existing reinforcing device is arranged on the surface of a flat supporting layer or a base plate, so that stable installation cannot be realized on the uneven surface such as a concrete chiseling surface;
4. the existing reinforcement mode is mainly vertical reinforcement, the transverse component force of the reinforcement device is provided by the shear strength of the reinforcement, and the transverse force action of the sleeper, particularly a turnout sleeper in a turnout area, in replacement construction cannot be met.
Therefore, aiming at the current situation that the transverse, longitudinal and vertical three-dimensional reinforcing devices of the sleeper are lacking in the daily maintenance and repair of the ballastless track sleeper of the high-speed railway and the emergency replacement process of the embedded switch sleeper of the turnout area, in order to ensure the stability and the smoothness of the switch sleeper, the requirement of passing the high-speed train on the next day is met, and the three-dimensional reinforcing device of the embedded switch sleeper of the ballastless track of the high-speed railway is needed to be designed.
Disclosure of Invention
In view of the above, the utility model provides a three-dimensional reinforcing device for a ballastless track sleeper of a high-speed railway, in particular to a three-dimensional reinforcing device used in maintenance and repair of an embedded sleeper of a ballastless track of a high-speed railway in an operation period and emergency replacement and repair of an embedded switch sleeper of a switch area, which has the following specific technical scheme:
the three-dimensional reinforcing device for the ballastless track sleeper of the high-speed railway comprises a claw-shaped steel frame, a self-locking bolt and a planted bar anchor, wherein the claw-shaped steel frame comprises a T-shaped base, a vertical L-shaped claw body and two transverse L-shaped claw bodies, the upper part of a first base of the T-shaped base is vertically connected with a lower vertical rod of the vertical L-shaped claw body, a first hole parallel to the lower vertical rod is formed in an upper cross rod of the vertical L-shaped claw body, and a second hole parallel to the upper cross rod is formed in the lower vertical rod; the two sides of the lower vertical rod, which are perpendicular to the direction of the upper cross rod, are respectively connected with a longitudinal rod of the transverse L-shaped claw body, the transverse rods of the transverse L-shaped claw body extend in the same direction as the upper cross rod, and the transverse rods are provided with holes III which are parallel to the longitudinal rods; a second base vertically connected with the first base is parallel to the upper cross bar and extends in a direction away from the upper cross bar; vertical holes are correspondingly formed in two outer end faces of the first base and one outer end face of the second base; an inclined hole is formed in the intersection of the first base, the second base and the lower vertical rod, and the inclined hole is inclined downwards and in a direction away from the second base; the self-locking bolt comprises a vertical self-locking bolt matched with the first hole, a horizontal self-locking bolt matched with the second hole and two longitudinal self-locking bolts correspondingly matched with the third holes; the tail part of the self-locking bolt is contacted with the corresponding sleeper surface; the bar planting anchoring comprises three vertical bar planting bars correspondingly matched with the three vertical holes and one inclined bar planting bar matched with the inclined holes; the top surface of the track bed plate is provided with a plate surface vertical hole and a plate surface inclined hole which correspond to the vertical hole and the inclined hole, and the planting bar penetrates through the corresponding upper hole and the lower hole and is screwed into the fixing nut at the upper part to anchor the T-shaped base on the track bed plate concrete.
By adopting the technical scheme, the device provided by the utility model consists of three parts, namely the claw-type steel frame, the self-locking bolt and the embedded bar anchoring, and the three-dimensional reinforcement of the sleeper is realized through the design of transverse, longitudinal and vertical buckling. By additionally arranging the oblique embedded bars, the horizontal component force of the sleeper is resisted when the high-speed train passes through the turnout. The rail sleeper position is fixed during train operation through the self-locking bolt, so that the safety and stability of the rail structure during sleeper replacement or emergency repair are ensured.
Preferably, the claw-type steel frame is formed by welding rectangular steel pipes, and the chamfer angle of the claw-type steel frame is reinforced by welding reinforcing rib plates.
Preferably, the vertical self-locking bolts, the horizontal self-locking bolts and the longitudinal self-locking bolts have the same structure, each self-locking bolt is fixed in a corresponding hole on the claw steel frame through a threaded sleeve, the head part of each self-locking bolt is a nut, and the tail part of each self-locking bolt is a spherical hinged steel support contacted with a corresponding sleeper surface.
Preferably, the contact surface of the spherical hinged steel support and the sleeper is stuck with a rubber backing plate, and the rubber backing plate is tightly attached to the sleeper surface.
Preferably, the rubber backing plate is one of natural rubber NR with the thickness of 5-10 mm and the static rigidity of 180-200 kN/mm, high-density polyethylene HDPE, vinyl acetate copolymer EVA, high-density polyethylene and vinyl acetate copolymer mixture HDPE/EVA and thermoplastic elastomer TPEE.
Preferably, the vertical bar planting is perpendicular to the surface of the ballast bed plate, and the oblique bar planting is 45-degree oblique bar planting.
Preferably, the vertical bar planting is perpendicular to the surface of the ballast bed plate, the inclined 45-degree bar planting is drilled at an angle of 45 degrees with the top surface of the ballast bed plate, the allowable deviation is +/-5 degrees, the drilling diameter is 20-32 mm, the drilling depth is 200-250 mm, the vertical bar planting and the inclined 45-degree bar planting are HRB 500-level threaded bars with the diameter of 16-28 mm, and the embedded depth of the bars is not less than 150mm.
The utility model also provides a three-dimensional reinforcement method for the ballastless track sleeper of the high-speed railway, which is applied to the three-dimensional reinforcement device for the ballastless track sleeper of the high-speed railway and comprises the following steps of:
(1) Pouring self-leveling quick-hardening mortar on the surfaces of the exposed ballast bed plates at the two ends of the sleeper for leveling;
(2) Drilling holes and planting bars at proper positions on two sides of the sleeper after the mortar is hardened;
(3) After the bar planting glue is hardened, a claw-type steel frame is installed and fixed by a fixing nut;
(4) And then sequentially and synchronously screwing the longitudinal self-locking bolts and the transverse self-locking bolts at two sides, and finally screwing the vertical self-locking bolts so that the tail parts of the self-locking bolts are tightly attached to the sleeper surface.
According to the method, self-leveling quick-hardening mortar is poured on the concrete surface of the ballast bed plate, so that base leveling is realized, a claw-type steel frame is fixed in a reinforcement anchoring mode, and then longitudinal, transverse and vertical self-locking bolts are sequentially and synchronously screwed, so that a rubber backing plate is tightly attached to a sleeper surface, three-dimensional reinforcement of the sleeper and safety and stability of a track structure are realized, and the method has the characteristics of easiness in disassembly and reusability. The device solves the practical problems that the existing reinforcing device cannot realize transverse, longitudinal and vertical three-dimensional reinforcement, is not suitable for reinforcing requirements of strip sleeper structures and the like, and is suitable for structural reinforcement during replacement or emergency repair of ballastless track sleepers and switch sleepers of high-speed railways.
Preferably, the self-leveling quick-hardening mortar is one of polymer cement mortar, magnesium phosphate cement repair mortar, epoxy resin mortar and acrylic resin mortar, wherein the compressive strength of 30min is more than or equal to 5MPa, the compressive strength of 1d is more than or equal to 20MPa, and the compressive strength of 7d is more than or equal to 40MPa.
Preferably, the tail part of the self-locking bolt is tightly attached to the sleeper surface through a rubber backing plate, the tight attachment is to screw a nut of the head part of the self-locking bolt through a torque wrench to adjust the distance between the bolt and the sleeper, the torque is 100-150 N.m, and the transverse, longitudinal and vertical three-dimensional buckling pressure is more than or equal to 300kN.
According to the three-dimensional reinforcing device and the reinforcing method for the ballastless track sleeper of the high-speed railway, which are provided by the utility model, through engineering practice contrast research, the device has the following excellent performances compared with the prior art:
(1) The rail sleeper can be reinforced transversely, longitudinally and vertically in three dimensions, and long-term stability of a rail structure during high-speed running of a train is ensured.
(2) The self-locking bolt is adopted, so that the loosening of the bolt caused by rail vibration when a train passes through is avoided.
(3) The spherical hinged steel support of self-locking bolt pastes suitable rubber backing plate, when not influencing the reinforcement effect, can effectively avoid causing structural damage to sleeper concrete contact surface because of the torque is too big.
(4) The claw type steel frame is of an integral welding structure, field assembly is not needed, the weight of a single reinforcing device is only 25 kg, the claw type steel frame is easy to detach, the installation and detachment efficiency is high, and the claw type steel frame can be repeatedly used.
(5) The sleeper structure is wide in application range and widely suitable for three-dimensional reinforcement of sleeper and switch sleeper structures in the fields of high-speed railways, common-speed railways and the like.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is an installation schematic diagram of a three-dimensional reinforcing device for a ballastless track sleeper of a high-speed railway.
Fig. 2 is a schematic diagram of a three-dimensional reinforcing device for a ballastless track sleeper of a high-speed railway.
Fig. 3 is a front view of a three-dimensional reinforcing device for a ballastless track sleeper of a high-speed railway.
Fig. 4 is a side view of a three-dimensional reinforcing device for a ballastless track sleeper of a high-speed railway.
Fig. 5 is a top view of a three-dimensional reinforcing device for a ballastless track sleeper of a high-speed railway.
Reference numerals illustrate: the concrete mortar comprises a first base, a lower vertical rod, a 3-upper cross rod, a 4-hole I, a 5-hole II, a 6-longitudinal rod, a 7-transverse rod, a 8-hole III, a 9-second base, a 10-vertical self-locking bolt, a 11-horizontal self-locking bolt, a 12-vertical self-locking bolt, a 13-vertical bar planting, a 14-oblique bar planting, a 15-fixing nut, a 16-rectangular steel pipe, a 17-reinforcing rib plate, a 18-nut, a 19-spherical hinged steel support, a 20-rubber backing plate and 21-self-leveling quick hardening mortar.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.
In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The utility model discloses a three-dimensional reinforcing device for a ballastless track sleeper of a high-speed railway, which is shown in fig. 1-5 and comprises a claw-type steel frame, a self-locking bolt and a planted bar anchor.
The claw-type steel frame comprises a T-shaped base, a vertical L-shaped claw body and two transverse L-shaped claw bodies, wherein the upper part of a first base 1 of the T-shaped base is vertically connected with a lower vertical rod 2 of the vertical L-shaped claw body, a first hole 4 parallel to the lower vertical rod 2 is formed in an upper cross rod 3 of the vertical L-shaped claw body, and a second hole 5 parallel to the upper cross rod 3 is formed in the lower vertical rod 2; the two sides of the lower vertical rod 2 perpendicular to the direction of the upper cross rod 3 are respectively connected with a longitudinal rod 6 of a transverse L-shaped claw body, a transverse rod 7 of the transverse L-shaped claw body extends in the same direction as the upper cross rod 3, and a hole III 8 parallel to the longitudinal rod 6 is formed in the transverse rod 7; a second base 9 vertically connected to the first base 1 is parallel to the upper rail 3 and extends in a direction away from the upper rail 3; vertical holes are correspondingly formed in two outer end faces of the first base 1 and one outer end face of the second base 9; the intersection of the first base 1, the second base 9 and the lower vertical rod 2 is provided with an inclined hole which is inclined downwards and in a direction away from the second base 9.
Further, the claw-type steel frame is formed by welding 40mm multiplied by 70mm rectangular steel pipes 16, the chamfer angle of the claw-type steel frame is reinforced by welding reinforcing rib plates 17, and the bottom of the claw-type steel frame is anchored on ballast bed plate concrete through planted ribs.
The self-locking bolts comprise a vertical self-locking bolt 10 matched with the first hole 4, a horizontal self-locking bolt 11 matched with the second hole 5 and two longitudinal self-locking bolts 12 correspondingly matched with the third holes 8; the tail of the self-locking bolt contacts with the corresponding sleeper surface, and the sleeper is indicated by A in fig. 2.
Specifically, the vertical self-locking bolt 10, the horizontal self-locking bolt 11 and the longitudinal self-locking bolt 12 have the same structure, each self-locking bolt is fixed in a corresponding hole on the claw-type steel frame through a threaded sleeve, the head part of the self-locking bolt is a hexagonal nut 18, and the tail part of the self-locking bolt is a spherical hinged steel support 19 contacted with a corresponding sleeper surface.
Further, a rubber backing plate 20 is adhered to the contact surface of the spherical hinged steel support 19 and the sleeper, and the rubber backing plate 20 is tightly adhered to the sleeper surface.
Further, the rubber backing plate 20 is one of natural rubber NR with the thickness of 5-10 mm and the static rigidity of 180-200 kN/mm, high-density polyethylene HDPE, vinyl acetate copolymer EVA, high-density polyethylene and vinyl acetate copolymer mixture HDPE/EVA and thermoplastic elastomer TPEE.
The bar planting anchoring comprises three vertical bar planting 13 correspondingly adapted to the three vertical holes and one inclined bar planting 14 adapted to the inclined holes; the top surface of the track bed plate is provided with a plate surface vertical hole and a plate surface inclined hole which correspond to the vertical hole and the inclined hole, and the planting bar penetrates through the corresponding upper hole and the lower hole and is screwed into the fixing nut 15 at the upper part to anchor the T-shaped base on the track bed plate concrete.
Further, the vertical bar planting 13 is perpendicular to the surface of the ballast bed plate, and the inclined bar planting 14 is an inclined 45-degree bar planting.
Furthermore, the vertical embedded bars 13 are drilled perpendicular to the surface of the ballast bed plate, the inclined 45-degree embedded bars and the top surface of the ballast bed plate form a 45-degree angle drilling, the allowable deviation is +/-5 degrees, the diameter of the drilling holes (namely the vertical holes on the plate surface and the inclined holes on the plate surface) is 20-32 mm, the drilling depth is 200-250 mm, the embedded vertical embedded bars 13 and the inclined 45-degree embedded bars are HRB 500-level threaded bars with the diameter of 16-28 mm, and the embedded depth of the bars is not less than 150mm.
The utility model also discloses a three-dimensional reinforcement method for the ballastless track sleeper of the high-speed railway, which is applied to the three-dimensional reinforcement device for the ballastless track sleeper of the high-speed railway, and comprises the following steps:
(1) Pouring self-leveling quick-hardening mortar 21 on the surfaces of the exposed track bed plates at the two ends of the sleeper for leveling;
(2) Drilling holes and planting bars at proper positions on two sides of the sleeper after the mortar is hardened;
(3) After the bar planting glue is hardened, a claw-type steel frame is installed and fixed by a double fixing nut 15;
(4) And then synchronously screwing the longitudinal self-locking bolts 12 and the transverse self-locking bolts 11 on two sides in sequence, and finally screwing the vertical self-locking bolts 10 to tightly attach the tail parts of the self-locking bolts to the sleeper surfaces.
Further, the self-leveling rapid hardening mortar 21 is one of polymer cement mortar, magnesium phosphate cement repair mortar, epoxy resin mortar and acrylic resin mortar, and the compressive strength of 30min is more than or equal to 5MPa, the compressive strength of 1d is more than or equal to 20MPa, and the compressive strength of 7d is more than or equal to 40MPa.
Further, the tail part of the self-locking bolt is tightly attached to the sleeper surface through a rubber backing plate 20, the distance between the bolt and the sleeper is adjusted by screwing a nut 18 at the head part of the self-locking bolt through a torque wrench, the torque is 100-150 N.m, and the transverse, longitudinal and vertical three-dimensional buckling pressure is more than or equal to 300kN.
Example 1:
three-dimensional reinforcement device and reinforcement method for emergency maintenance of ballastless track embedded sleeper of high-speed railway in operation period
The three-dimensional reinforcing device is composed of a claw-type steel frame welded by a rectangular steel pipe 16 with the length of 40mm multiplied by 70mm, 1 vertical self-locking bolt 10, 1 horizontal self-locking bolt 11, 2 longitudinal self-locking bolts 12 and a bar planting anchoring three part. The self-locking bolt is fixed on the claw-type steel frame through a threaded sleeve, the top is a hexagonal nut 18, the bottom is a spherical hinged steel support 19, the contact surface of the steel support and the sleeper is stuck with an HDPE rubber backing plate 20 with the thickness of 5mm and the static rigidity of 180 kN/mm.
The reinforcing method specifically comprises the following steps: firstly, removing track bed concrete at two ends of a sleeper, pouring polymer quick-hardening mortar with compressive strength of 8.2MPa on the surface of an exposed track bed plate for 30min, drilling holes on two sides of the sleeper after the mortar is hardened, drilling holes on two sides of the sleeper, wherein vertical embedded bars 13 are vertical to the surface of the track bed plate, drilling holes with 45-degree inclined embedded bars and the top surface of the track bed plate at an angle of 45 degrees, allowing deviation of +/-5 degrees, wherein the drilling hole diameter is 30mm, the drilling hole depth is 200mm, the embedded diameter is 25mm HRB 500-level threaded steel bars, and the embedded depth of the steel bars is 150mm; after the bar planting glue is hardened, a claw-type steel frame is installed and fixed by double fixing nuts, then the longitudinal self-locking bolts 12 and the transverse self-locking bolts 11 on two sides are sequentially and synchronously screwed by a torque wrench, and finally the vertical self-locking bolts 10 are screwed, so that the torque force for tightly attaching the rubber backing plate 20 at the bottom of the self-locking bolts to the sleeper surface is 100 N.m.
After the three-dimensional reinforcement device is installed according to the embodiment 1, train operation parameters and sleeper stability parameters are monitored on site when a train passes through, and are shown in table 1. It can be seen that the track structure safety meets the high speed train passing requirement.
Table 1 example 1 train operation parameters and sleeper stability parameter monitoring data
| Monitoring items | Maximum value | Limit value |
| Derailment coefficient | 0.14 | 0.8 |
| Load shedding rate | 0.12 | 0.8 |
| Transverse force/kN of wheel axle | 15.2 | / |
| Sleeper vertical displacement (end)/mm | 0.15 | / |
| Transverse displacement (end)/mm of sleeper | 0.12 | / |
| Longitudinal displacement (end)/mm of sleeper | 0.10 | / |
| Vertical displacement (middle part)/mm of sleeper | 0.08 | / |
| Transverse displacement (middle)/mm of sleeper | 0.08 | / |
| Longitudinal displacement (centre)/mm of sleeper | 0.04 | / |
Example 2:
three-dimensional reinforcement device and reinforcement method for rapid replacement of ballastless track switch tie of high-speed railway in operation period
The three-dimensional reinforcing device is composed of a claw-type steel frame welded by a rectangular steel pipe 16 with the length of 40mm multiplied by 70mm, 1 vertical self-locking bolt 10, 1 horizontal self-locking bolt 11, 2 longitudinal self-locking bolts 12 and a bar planting anchoring three part. The self-locking bolt is fixed on the claw-type steel frame through a threaded sleeve, the top is a hexagonal nut 18, the bottom is a spherical hinged steel support 19, the contact surface of the steel support and the switch tie is stuck with a TPEE rubber backing plate 20 with the thickness of 10mm and the static rigidity of 200 kN/mm.
The reinforcing method specifically comprises the following steps: firstly, removing concrete of a ballast bed around a switch sleeper, then pouring epoxy resin mortar with the compressive strength of 13.5MPa on the surface of an exposed ballast bed plate for leveling, drilling holes on two sides of the switch sleeper after the mortar is hardened, drilling holes on the vertical embedded bars 13 perpendicular to the surface of the ballast bed plate, drilling holes with the inclined 45-degree embedded bars at an angle of 45 degrees with the top surface of the ballast bed plate, allowing the deviation to be +/-5 degrees, wherein the drilling hole diameter is 25mm, the drilling hole depth is 250mm, the embedded diameter is 20mm HRB 500-level threaded steel bars, and the embedded depth of the steel bars is 180mm; after the bar planting glue is hardened, a claw-type steel frame is installed and fixed by double fixing nuts, then the longitudinal self-locking bolts 12 and the transverse self-locking bolts 11 on two sides are sequentially and synchronously screwed by a torque wrench, and finally the vertical self-locking bolts 10 are screwed, so that the torque force between the rubber backing plate 20 at the bottom of the self-locking bolts and the switch tie surface is 150 N.m.
After the three-dimensional reinforcement device is installed according to example 2, train operation parameters and switch tie stability parameters are monitored on site when the train passes, as shown in table 2. It can be seen that the track structure safety meets the high speed train passing requirement.
Table 2 example 2 train operation parameters and switch tie stability parameter monitoring data
| Monitoring items | Maximum value | Limit value |
| Derailment coefficient | 0.25 | 0.8 |
| Load shedding rate | 0.18 | 0.8 |
| Transverse force/kN of wheel axle | 13.2 | / |
| Vertical displacement (end)/mm of switch tie | 0.25 | / |
| Lateral displacement (end)/mm of switch tie | 0.17 | / |
| Longitudinal displacement (end)/mm of switch tie | 0.12 | / |
| Vertical displacement (middle)/mm of switch tie | 0.16 | / |
| Lateral displacement (middle)/mm of switch tie | 0.05 | / |
| Longitudinal displacement (middle)/mm of switch tie | 0.08 | / |
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The three-dimensional reinforcing device for the ballastless track sleeper of the high-speed railway is characterized by comprising a claw-shaped steel frame, a self-locking bolt and a planted bar anchor, wherein the claw-shaped steel frame comprises a T-shaped base, a vertical L-shaped claw body and two transverse L-shaped claw bodies, the upper part of a first base of the T-shaped base is vertically connected with a lower vertical rod of the vertical L-shaped claw body, a first hole parallel to the lower vertical rod is formed in an upper cross rod of the vertical L-shaped claw body, and a second hole parallel to the upper cross rod is formed in the lower vertical rod; the two sides of the lower vertical rod, which are perpendicular to the direction of the upper cross rod, are respectively connected with a longitudinal rod of the transverse L-shaped claw body, the transverse rods of the transverse L-shaped claw body extend in the same direction as the upper cross rod, and the transverse rods are provided with holes III which are parallel to the longitudinal rods; a second base vertically connected with the first base is parallel to the upper cross bar and extends in a direction away from the upper cross bar; vertical holes are correspondingly formed in two outer end faces of the first base and one outer end face of the second base; an inclined hole is formed in the intersection of the first base, the second base and the lower vertical rod, and the inclined hole is inclined downwards and in a direction away from the second base; the self-locking bolt comprises a vertical self-locking bolt matched with the first hole, a horizontal self-locking bolt matched with the second hole and two longitudinal self-locking bolts correspondingly matched with the third holes; the tail part of the self-locking bolt is contacted with the corresponding sleeper surface; the bar planting anchoring comprises three vertical bar planting bars correspondingly matched with the three vertical holes and one inclined bar planting bar matched with the inclined holes; the top surface of the track bed plate is provided with a plate surface vertical hole and a plate surface inclined hole which correspond to the vertical hole and the inclined hole, and the planting bar penetrates through the corresponding upper hole and the lower hole and is screwed into the fixing nut at the upper part to anchor the T-shaped base on the track bed plate concrete.
2. The three-dimensional reinforcing device for the ballastless track sleeper of the high-speed railway according to claim 1, wherein the claw-type steel frame is formed by welding rectangular steel pipes, and the chamfer angle of the claw-type steel frame is reinforced by welding reinforcing rib plates.
3. The three-dimensional reinforcing device for the ballastless track sleeper of the high-speed railway according to claim 1, wherein the vertical self-locking bolts, the horizontal self-locking bolts and the longitudinal self-locking bolts have the same structure, each self-locking bolt is fixed in a corresponding hole on the claw-type steel frame through a threaded sleeve, the head part of the self-locking bolt is a nut, and the tail part of the self-locking bolt is a spherical hinged steel support contacted with the corresponding sleeper surface.
4. A three-dimensional reinforcing device for a ballastless track sleeper of a high-speed railway according to claim 3, wherein a rubber backing plate is adhered to the contact surface of the spherical hinged steel support and the sleeper, and the rubber backing plate is tightly adhered to the sleeper surface.
5. The three-dimensional reinforcing device for the ballastless track sleeper of the high-speed railway according to claim 4, wherein the rubber backing plate is one of natural rubber NR, high-density polyethylene HDPE, vinyl acetate copolymer EVA and thermoplastic elastomer TPEE with the thickness of 5-10 mm and the static rigidity of 180-200 kN/mm.
6. The three-dimensional reinforcing device for the ballastless track sleeper of the high-speed railway according to claim 1, wherein the vertical embedded bars are perpendicular to the surface of a ballast bed plate, and the inclined embedded bars are inclined 45-degree embedded bars.
7. The three-dimensional reinforcing device for the ballastless track sleeper of the high-speed railway according to claim 6, wherein the vertical embedded bars are drilled perpendicular to the surface of the ballast plate, the inclined 45-degree embedded bars and the top surface of the ballast plate form a 45-degree angle drilling, the allowable deviation is +/-5 degrees, the drilling diameter is 20-32 mm, the drilling depth is 200-250 mm, the embedded vertical embedded bars and the inclined 45-degree embedded bars are HRB 500-grade threaded bars with the diameter of 16-28 mm, and the embedded depth of the bars is not less than 150mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222800872.9U CN219117851U (en) | 2022-10-24 | 2022-10-24 | Three-dimensional reinforcing apparatus of high-speed railway ballastless track sleeper |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222800872.9U CN219117851U (en) | 2022-10-24 | 2022-10-24 | Three-dimensional reinforcing apparatus of high-speed railway ballastless track sleeper |
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| CN219117851U true CN219117851U (en) | 2023-06-02 |
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