CN115652708B - Three-dimensional reinforcement device and reinforcement method for ballastless track sleeper of high-speed railway - Google Patents
Three-dimensional reinforcement device and reinforcement method for ballastless track sleeper of high-speed railwayInfo
- Publication number
- CN115652708B CN115652708B CN202211304706.8A CN202211304706A CN115652708B CN 115652708 B CN115652708 B CN 115652708B CN 202211304706 A CN202211304706 A CN 202211304706A CN 115652708 B CN115652708 B CN 115652708B
- Authority
- CN
- China
- Prior art keywords
- self
- sleeper
- vertical
- ballastless track
- speed railway
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Machines For Laying And Maintaining Railways (AREA)
Abstract
The invention discloses a three-dimensional reinforcing device and a reinforcing method for a ballastless track sleeper of a high-speed railway, wherein the device comprises a claw-type steel frame, self-locking bolts and embedded bar anchors, the claw-type steel frame is fixed in the embedded bar anchor mode by pouring self-leveling quick-hardening mortar on the surface of a ballast bed plate for leveling, then the longitudinal, transverse and vertical self-locking bolts are synchronously screwed in sequence, so that the self-locking bolts are tightly attached to the sleeper surface, the three-dimensional reinforcement of the sleeper and the safety and stability of the track structure are realized, and the sleeper has the characteristics of easy disassembly and reusability. The invention 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 invention relates to the technical field of maintenance of ballastless tracks of high-speed railways, in particular to a three-dimensional reinforcing device and a three-dimensional reinforcing method 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 locating rack, which is mainly used for preventing a track slab from floating up when mortar is poured, and can not meet the requirements of transverse and longitudinal limit of a turnout sleeper, CN206553829U and CN104389249a respectively propose a compression limiting device of an assembled high-speed railway ballastless track slab, both the devices can only realize vertical compression, and can not meet the requirements of transverse and longitudinal limit of the turnout sleeper, and can not be suitable for mounting the turnout sleeper, and CN 108004855B proposes a compression limiting device and a method of a plate-type ballastless track structure, which are suitable for the plate-type ballastless track structure and are not suitable for reinforcing the sleeper structure of a cast-in-situ ballast railway. 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 invention provides a three-dimensional reinforcing device and a reinforcing method for ballastless track sleepers of a high-speed railway, in particular to a three-dimensional reinforcing device and a reinforcing method for use in maintenance and repair of ballastless track embedded sleepers of a high-speed railway and emergency replacement and repair of embedded switch blocks of a switch area in an operation period, which have 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 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, the transverse rods are provided with a third hole parallel to the longitudinal rods, a second base perpendicularly connected with the first base is parallel to the upper cross rod and extends in the direction away from the upper cross rod, two outer end faces of the first base and one outer end face of the second base are respectively provided with a vertical hole in a corresponding manner, the junction of the first base, the second base and the lower vertical rod is provided with an inclined hole, the inclined hole is inclined downwards and in the direction away from the second base, the self-locking bolt comprises a vertical self-locking bolt matched with the first hole, a transverse self-locking bolt matched with the second hole and two longitudinal self-locking bolts matched with the third hole, the tail parts of the self-locking bolts are in contact with the corresponding anchor faces, the inclined hole is formed in the junction of the first base, the inclined hole is formed in the inclined hole corresponding manner to the vertical tie bar, the inclined tie bar is formed by inclined hole is formed in the inclined hole corresponding to the vertical tie bar, and inclined tie bar is formed in the inclined hole corresponding to the vertical tie bar, and inclined hole is formed in the inclined hole bar is inclined hole face, and vertical tie bar is formed in the inclined hole vertical bar plate face corresponds to the vertical tie bar plate and vertical bar is formed in the vertical hole bar plate face and vertical bar and is opposite to vertical hole bar hole, and the plate surface is provided with inclined holes, the planting ribs penetrate through the corresponding upper holes and the lower holes and are screwed into the fixing nuts at the upper parts, and the T-shaped base is anchored on the ballast plate concrete.
By adopting the technical scheme, the device provided by the invention 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 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, 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 slab, so that the leveling of the base is realized, the claw-type steel frame is fixed in a reinforcement anchoring mode, and then the longitudinal, transverse and vertical self-locking bolts are sequentially and synchronously screwed, so that the rubber backing plate is tightly attached to the sleeper surface, the three-dimensional reinforcement of the sleeper and the 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 invention, 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 invention 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 invention, 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.
The reference numerals indicate that the mortar comprises 1-first base, 2-lower vertical rods, 3-upper cross rods, 4-first holes, 5-second holes, 6-longitudinal rods, 7-transverse rods, 8-third holes, 9-second bases, 10-vertical self-locking bolts, 11-horizontal self-locking bolts, 12-longitudinal self-locking bolts, 13-vertical bar planting, 14-oblique bar planting, 15-fixing nuts, 16-rectangular steel pipes, 17-reinforcing rib plates, 18-nuts, 19-spherical hinged steel supports, 20-rubber backing plates and 21-self-leveling quick-hardening mortar.
Detailed Description
Embodiments of the present invention 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 invention and should not be construed as limiting the invention.
In the description of the present invention, 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 invention 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 invention.
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 invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The invention 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 horizontal 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 transverse rod 3 of the vertical L-shaped claw body, a second hole 5 parallel to the upper vertical rod 3 is formed in the lower vertical rod 2, two sides of the lower vertical rod 2 perpendicular to the direction of the upper transverse rod 3 are respectively connected with a longitudinal rod 6 of the horizontal L-shaped claw body, the transverse rods 7 of the horizontal L-shaped claw bodies extend in the same direction as the upper transverse rod 3, three holes 8 parallel to the longitudinal rods 6 are formed in the transverse rods 7, a second base 9 which is vertically connected with the first base 1 is parallel to the upper transverse rod 3 and extends in the direction away from the upper transverse rod 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, oblique holes are formed in the positions of the first base 1, the second base 9 and the lower vertical rod 2 are respectively, and the oblique holes are obliquely formed in the positions of the first base 1, the second base 9 and the lower vertical rod 2 are obliquely connected in the directions 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 parts of the self-locking bolts are contacted with the corresponding sleeper surfaces, and the sleeper is indicated as a position 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 a thickness of 5-10 mm and a static stiffness of 180-200 kN/mm, high-density polyethylene HDPE, vinyl acetate copolymer EVA, a mixture of high-density polyethylene and vinyl acetate copolymer HDPE/EVA, and a thermoplastic elastomer TPEE.
The steel bar planting anchoring comprises three vertical steel bar planting 13 correspondingly matched with the three vertical holes and one inclined steel bar planting 14 correspondingly matched with the inclined holes, wherein the top surface of the ballast bed plate is provided with a vertical plate hole and an inclined plate hole corresponding to the vertical holes and the inclined holes, the steel bar planting passes through the corresponding upper and lower holes and is screwed into the fixing nut 15 at the upper part, and the T-shaped base is anchored on the ballast 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 are drilled at an angle of 45 degrees, the allowable deviation is +/-5 degrees, the diameter of the drilled holes (namely the vertical holes of the plate surface and the inclined holes of 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 invention 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 30mi 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 can be 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 comprises the steps of firstly chiseling out ballast 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 ballast bed plate for 30min, carrying out leveling, drilling steel planting bars on two sides of the sleeper after the mortar is hardened, drilling holes on the vertical steel planting bars 13 perpendicular to the surface of the ballast bed plate, drilling holes with an angle of 45 degrees between the inclined steel planting bars and the top of the ballast bed plate, allowing deviation of +/-5 degrees, drilling holes with a diameter of 30mm and a drilling depth of 200mm, implanting HRB 500-level threaded steel bars with a diameter of 25mm, embedding steel bars with a depth of 150mm, installing claw-type steel frames after the steel planting bars are hardened, fixing the claw-type steel frames by double fixing nuts, sequentially and synchronously screwing the longitudinal self-locking bolts 12 and the transverse self-locking bolts 11 through torque wrenches, and finally screwing the vertical self-locking bolts 10, so that the torque between the rubber backing plates 20 at the bottoms of the self-locking bolts and 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 comprises the steps of firstly chiseling concrete of a ballast bed around a switch sleeper, pouring epoxy resin mortar with the compressive strength of 13.5MPa on the surface of an exposed ballast bed board for 30min, leveling, drilling steel planting bars on two sides of the switch sleeper after the mortar is hardened, drilling vertical steel planting bars 13 perpendicular to the surface of the ballast bed board, drilling holes with the inclination angle of 45 degrees from the top of the ballast bed board, allowing deviation of +/-5 degrees, drilling holes with the diameter of 25mm, drilling holes with the depth of 250mm, implanting 20mm HRB 500-level threaded steel bars, embedding steel bars with the depth of 180mm, installing claw-type steel frames after the steel planting bars are hardened, fixing by double fixing nuts, sequentially and synchronously screwing the longitudinal self-locking bolts 12 and the transverse self-locking bolts 11 on two sides by torque wrenches, and finally screwing the vertical self-locking bolts 10, so that the rubber backing plates 20 at the bottoms of the self-locking bolts are tightly attached to the surface of the switch sleeper 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 invention. 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 invention. Thus, the present invention 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 (9)
1. A three-dimensional reinforcement method for ballastless track sleeper of high-speed railway is characterized by applying a three-dimensional reinforcement device for ballastless track sleeper of high-speed railway, comprising a claw-shaped steel frame, a self-locking bolt and a bar planting 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, a second hole parallel to the upper cross rod is formed in the lower vertical rod, two sides of the lower vertical rod perpendicular to the upper cross rod are respectively connected with a longitudinal rod of the transverse L-shaped claw body, the transverse rod and the upper cross rod are provided with a third hole parallel to the longitudinal rod, a second base of the vertical base is parallel to the upper cross rod and far away from the upper cross rod, a second hole is formed in the upper cross rod and far away from the upper cross rod, and the self-locking bolt is formed in the inclined direction and the inclined direction is formed between the first base and the second hole is far from the upper end surface and the second base and the self-locking bolt is formed in the inclined direction and far from the vertical hole The track bed plate comprises a track bed plate, a transverse self-locking bolt, two longitudinal self-locking bolts, a steel bar planting anchor, a fixing nut, a T-shaped base, a transverse self-locking bolt, a longitudinal self-locking bolt and a fixing nut, wherein the transverse self-locking bolt is matched with the second hole and the two longitudinal self-locking bolts are matched with the third holes;
the reinforcing method comprises the following steps:
(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.
2. The three-dimensional reinforcement method 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 reinforcement method 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. The three-dimensional reinforcement method for the ballastless track sleeper of the 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 reinforcement method 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 with the thickness of 5-10 mm, the static rigidity of 180-200 kN/mm, high-density polyethylene HDPE, vinyl acetate copolymer EVA, a mixture of high-density polyethylene and vinyl acetate copolymer HDPE/EVA and thermoplastic elastomer TPEE.
6. The three-dimensional reinforcement method 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 method 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-level threaded bars with the diameter of 16-28 mm, and the embedded depth of the bars is not less than 150 mm.
8. The three-dimensional reinforcement method for the ballastless track sleeper of the high-speed railway according to claim 1, wherein the self-leveling rapid hardening mortar is one of polymer cement mortar, magnesium phosphate cement repair mortar, epoxy resin mortar and acrylic resin mortar, the compressive strength is more than or equal to 5 MPa for 30min, the compressive strength is more than or equal to 20MPa for 1d and the compressive strength is more than or equal to 40MPa for 7 d.
9. The three-dimensional reinforcement method for the ballastless track sleeper of the high-speed railway according to claim 1, wherein 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 300 kN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211304706.8A CN115652708B (en) | 2022-10-24 | 2022-10-24 | Three-dimensional reinforcement device and reinforcement method for ballastless track sleeper of high-speed railway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211304706.8A CN115652708B (en) | 2022-10-24 | 2022-10-24 | Three-dimensional reinforcement device and reinforcement method for ballastless track sleeper of high-speed railway |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115652708A CN115652708A (en) | 2023-01-31 |
| CN115652708B true CN115652708B (en) | 2025-12-09 |
Family
ID=84990602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211304706.8A Active CN115652708B (en) | 2022-10-24 | 2022-10-24 | Three-dimensional reinforcement device and reinforcement method for ballastless track sleeper of high-speed railway |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115652708B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116219808A (en) * | 2023-03-17 | 2023-06-06 | 中铁二十三局集团轨道交通工程有限公司 | A Ballasted Track Reinforcement Structure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191124690A (en) * | 1911-11-06 | 1912-10-31 | John Henry Flood | Improvements in or relating to Means for Securing Railway Rails to Reinforced Concrete Sleepers. |
| CN108004855A (en) * | 2017-12-14 | 2018-05-08 | 沪杭铁路客运专线股份有限公司 | A kind of compression limiting device and method for platy ballastless track structure |
| CN212128691U (en) * | 2020-03-02 | 2020-12-11 | 武汉比邻科技发展有限公司 | Steel buttress for replacing and temporarily supporting subway sleeper |
| CN212771757U (en) * | 2020-04-29 | 2021-03-23 | 中铁二院工程集团有限责任公司 | Ballastless track structure capable of adjusting height greatly |
| CN219117851U (en) * | 2022-10-24 | 2023-06-02 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | A three-dimensional reinforcement device for ballastless track sleepers of high-speed railway |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0228591D0 (en) * | 2002-12-07 | 2003-01-15 | Romtech Ltd | Method of refurbishing parts of a railway track |
| CN101575832B (en) * | 2009-06-03 | 2011-07-27 | 中铁一局集团新运工程有限公司 | High-speed switch assembly platform for ballast rail |
| CN110761133B (en) * | 2019-09-12 | 2024-12-17 | 中铁第四勘察设计院集团有限公司 | Automatic fine adjustment system and method for sleeper plate type track structure of open bridge deck on steel truss girder |
| CN111560795B (en) * | 2020-04-29 | 2024-07-19 | 中铁二院工程集团有限责任公司 | Ballastless track structure with large adjustment amount and easy installation |
| CN114575196A (en) * | 2022-03-15 | 2022-06-03 | 湖北木之君工程材料有限公司 | Sleeper void-eliminating construction method for long-sleeper embedded type ballastless track |
-
2022
- 2022-10-24 CN CN202211304706.8A patent/CN115652708B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191124690A (en) * | 1911-11-06 | 1912-10-31 | John Henry Flood | Improvements in or relating to Means for Securing Railway Rails to Reinforced Concrete Sleepers. |
| CN108004855A (en) * | 2017-12-14 | 2018-05-08 | 沪杭铁路客运专线股份有限公司 | A kind of compression limiting device and method for platy ballastless track structure |
| CN212128691U (en) * | 2020-03-02 | 2020-12-11 | 武汉比邻科技发展有限公司 | Steel buttress for replacing and temporarily supporting subway sleeper |
| CN212771757U (en) * | 2020-04-29 | 2021-03-23 | 中铁二院工程集团有限责任公司 | Ballastless track structure capable of adjusting height greatly |
| CN219117851U (en) * | 2022-10-24 | 2023-06-02 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | A three-dimensional reinforcement device for ballastless track sleepers of high-speed railway |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115652708A (en) | 2023-01-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103174071B (en) | Construction technology of short sleeper vibration attenuation fastener with improved structure replacing elasticity short sleeper | |
| CN109972538B (en) | Steel plate inner filling material combined reinforced concrete bridge structure and construction technology | |
| CN212247672U (en) | An easy-to-adjust assembled ballastless track | |
| US8544763B2 (en) | Prefabricated plinth for supporting a railway track | |
| US3223328A (en) | Track structure for railroads and the like | |
| CN110055835A (en) | Subway is laid a railway track by-pass temporary transition device and construction method | |
| CN115652708B (en) | Three-dimensional reinforcement device and reinforcement method for ballastless track sleeper of high-speed railway | |
| CN209798444U (en) | A truss sleeper ballastless track for super-slope cog railway | |
| CN219117851U (en) | A three-dimensional reinforcement device for ballastless track sleepers of high-speed railway | |
| CN212955980U (en) | Novel fastener | |
| CN102352581B (en) | Wide joint device for slab ballastless track | |
| WO2011079675A1 (en) | Construction method for double-block ballastless track bed on bridge | |
| CN114086435B (en) | Full-assembled prefabricated plate type track structure | |
| CN116201573B (en) | Construction method for rock burst tunnel prevention and control system | |
| CN111501428A (en) | Direct-buried fastener and construction method thereof | |
| CN216474583U (en) | A kind of external prestressing reinforcement device for hollow slab beam | |
| CN111648171A (en) | Pulling type transverse deviation rectifying method for ballastless track structure | |
| CN211285229U (en) | Full-prefabricated assembled track structure on steel truss girder | |
| CN212611722U (en) | An anti-climbing device for railway track system | |
| CN223358085U (en) | High-speed railway large-span bridge transition plate renovation structure | |
| CN115075130A (en) | Longitudinal anchoring system for seamless toothed rails on bridge and behind abutment and construction method | |
| CN210151489U (en) | Temporary Transition Device for Subway Trackside Passage | |
| CN217896082U (en) | Transition fastener for replacing ballastless track double-block sleeper | |
| KR100648007B1 (en) | Box culvert structure in which the precast base plate is fixed and installed integrally and method of constructing | |
| KR101781045B1 (en) | Asphalt concrete track having geo-textile and steel pipe-shaped apparatus for withstanding against track displacement, and construction method for the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |