High-speed railway ballastless track sleeper three-dimensional reinforcing device and reinforcing method

Abstract

The application discloses a high-speed railway ballastless track sleeper three-dimensional reinforcing device and a reinforcing method, and relates to the technical field of railway track structures, in particular to a high-speed railway ballastless track sleeper three-dimensional reinforcing device and a reinforcing method. The device comprises a claw type steel frame, self-locking bolts and a planted steel bar anchorage, the surface of a track bed plate is leveled by pouring self-leveling fast-hardening mortar, the claw type steel frame is fixed in the form of the planted steel bar anchorage, then the longitudinal, transverse and vertical self-locking bolts are sequentially and synchronously tightened, the self-locking bolts are tightly combined with the surface of the sleeper, three-dimensional reinforcement of the sleeper and safety and stability of the track structure are realized, and the device has the characteristics of easy disassembly and reusability. The application solves the problems that the existing reinforcing device cannot realize three-dimensional reinforcement in the horizontal, longitudinal and vertical directions, is not suitable for reinforcing requirements of long strip sleeper structures and the like, and is suitable for structure reinforcement during replacement or emergency repair of high-speed railway ballastless track sleepers and frog sleepers.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of maintenance and repair of high-speed railway ballastless track, and more particularly to a three-dimensional sleeper reinforcing device for high-speed railway ballastless track and a reinforcing method. BACKGROUND

[0002] Turnout is a weak link of high-speed railway track structure and a key equipment limiting train passing speed. Turnout ballastless track structure is divided into long sleeper embedded type ballastless track and turnout area slab type ballastless track, wherein the long sleeper embedded type ballastless track structure is widely used in China. The long sleeper embedded type ballastless track structure in the turnout area is composed of turnout rail parts, fasteners, turnout sleeper, track bed slab and concrete supporting layer / base plate from top to bottom. The concrete sleeper in the turnout area is an important part of the turnout structure, which transmits the train load borne by the turnout rail parts to the lower foundation on the one hand, and maintains the track gauge, direction and height of the turnout area on the other hand. The service state of the concrete sleeper has a great influence on the entire turnout system.

[0003] With the increase of service time, some individual sleepers in the turnout area of the ballastless track of some lines have been damaged. Once the damage of the sleepers reaches the failure level, the failed sleepers need to be replaced. At present, two sky windows are needed to complete the replacement of sleepers in the operation period. The first sky window is used to complete the removal of the track bed concrete around the sleepers, and the second sky window is used to complete the replacement of the turnout sleeper and the restoration of the track bed concrete. After the removal of the track bed concrete around the sleepers, the sleepers lose the constraint and limiting effect of the surrounding track bed concrete, and cannot meet the demand of high-speed train passing the next day. In order to prevent the displacement of the sleepers, the existing method is to fill ballast around the sleepers to temporarily reinforce the sleepers to be replaced. However, this method is similar to the reinforcement of ballast track sleepers, which not only has a large workload of laying and recovering ballast, but also changes the original stress structure of the ballastless track, and has a great influence on the track structure. Therefore, during the treatment period, the speed is generally limited to 80km / h, which greatly interferes with the operation of the line.

[0004] CN203654109U proposes a track slab laying positioning frame, mainly used to prevent the track slab from floating during the pouring of the mortar, which cannot meet the demand for limiting the transverse and longitudinal direction of the sleeper; CN206553829U and CN104389249A respectively propose a compression limiting device for an assembled high-speed rail ballastless track slab, both of which can only realize vertical compression, and cannot meet the demand for limiting the transverse and longitudinal direction of the sleeper, nor can they be applied to the installation of the sleeper; CN108004855B proposes a compression limiting device and method for a slab-type ballastless track structure, which is applicable to the slab-type ballastless track structure, but not applicable to the reinforcement of the cast-in-place bed-type ballastless track sleeper structure. The bottom cavity of the compression limiting device is filled by using the pouring bag grouting leveling method, which is applicable to the planar structure such as the base plate / supporting layer, and cannot be applied to the leveling of the bed concrete chiseled surface. At the same time, the device can only realize vertical compression and transverse limiting, and cannot meet the demand for longitudinal limiting.

[0005] In general, at present, the track slab reinforcement device has been applied to the treatment construction of the slab-type ballastless track structure, but it is still blank in the three-dimensional reinforcement of the sleeper, and the following problems mainly exist in the application of the existing reinforcement device:

[0006] 1. The existing reinforcement device is mainly designed for the track slab compression limiting of the slab-type ballastless track structure, needs to be assembled on the line, and cannot be applied to the reinforcement demand of the long strip-shaped sleeper structure;

[0007] 2. It mainly focuses on the vertical compression of the track structure, and the transverse limiting is auxiliary, and cannot realize the longitudinal limiting of the track structure;

[0008] 3. The existing reinforcement device is installed on the flat supporting layer or base plate surface, and cannot be stably installed on the uneven surface such as the concrete chiseled surface;

[0009] 4. The existing reinforcement device is mainly designed for vertical reinforcement, and the transverse force of the reinforcement device is provided by the shear strength of the steel bar, which cannot meet the transverse force action of the sleeper, especially the sleeper in the replacement construction of the turnout area.

[0010] Therefore, in view of the lack of three-dimensional reinforcement device for the sleeper in the process of daily maintenance and repair of the high-speed railway ballastless track sleeper and the emergency replacement of the embedded sleeper in the turnout area, in order to ensure the stability of the sleeper and the smoothness of the line and meet the needs of the next day's high-speed train operation, it is urgent to design a three-dimensional reinforcement device for the embedded sleeper in the high-speed railway ballastless track. SUMMARY

[0011] In view of this, the application provides a high-speed railway ballastless track sleeper three-dimensional reinforcing device and reinforcing method, in particular to a three-dimensional reinforcing device and reinforcing method used in the process of buried sleeper maintenance and repair and emergency replacement of buried turnout sleeper in the turnout area of high-speed railway ballastless track in operation, and the specific technical scheme is as follows.

[0012] The high-speed railway ballastless track sleeper three-dimensional reinforcing device comprises a claw type steel frame, a self-locking bolt and a planted bar anchorage, the claw type steel frame comprises a T-shaped base, a vertical L-shaped claw body and two horizontal L-shaped claw bodies, the first base upper part of the T-shaped base is vertically connected with the lower vertical rod of the vertical L-shaped claw body, a hole one parallel to the lower vertical rod is formed in the upper horizontal rod of the vertical L-shaped claw body, and a hole two parallel to the upper horizontal rod is formed in the lower vertical rod; the two sides of the lower vertical rod perpendicular to the direction of the upper horizontal rod are respectively connected with the longitudinal rods of the horizontal L-shaped claw bodies, the horizontal rods of the horizontal L-shaped claw bodies extend in the same direction as the upper horizontal rod, and a hole three parallel to the longitudinal rods is formed in the horizontal rods; the second base vertically connected with the first base extends in parallel to the upper horizontal rod and away from the upper horizontal rod; vertical holes are respectively formed in the two outer end faces of the first base and one outer end face of the second base; an oblique hole is formed in the intersection of the first base, the second base and the lower vertical rod, and the oblique hole is inclined downward and away from the second base; the self-locking bolt comprises a vertical self-locking bolt matched with the hole one, a horizontal self-locking bolt matched with the hole two and two longitudinal self-locking bolts matched with the two hole threes; the tail of the self-locking bolt is in contact with the corresponding sleeper surface; the planted bar anchorage comprises three vertical planted bars matched with the three vertical holes and one oblique planted bar matched with the oblique hole; the plate surface vertical holes and the plate surface oblique holes corresponding to the vertical holes and the oblique hole are formed in the top surface of the track bed plate, the planted bars pass through the corresponding upper and lower holes and are screwed into the fixed nuts at the upper part, and the T-shaped base is anchored on the track bed plate concrete.

[0013] By adopting the above technical scheme, the device is composed of the claw type steel frame, the self-locking bolt and the planted bar anchorage, the three-dimensional reinforcement of the sleeper is realized through the horizontal, longitudinal and vertical buckling design, the oblique planted bar is additionally arranged to resist the horizontal force of the sleeper when the high-speed train passes through the turnout, the self-locking bolt is used to fix the position of the sleeper during the train operation, and the safety and stability of the track structure during the replacement or emergency repair of the sleeper are ensured.

[0014] Preferably, the claw type steel frame is welded by rectangular steel pipes, and the chamfered part is welded and reinforced by a reinforcing rib plate.

[0015] Preferably, the vertical self-locking bolt, the horizontal self-locking bolt, the longitudinal self-locking bolt are of the same structure, each of the self-locking bolts is fixed in the corresponding hole of the claw steel frame through a threaded sleeve, the head of the self-locking bolt is a nut, and the tail is a spherical articulated steel support in contact with the corresponding sleeper surface.

[0016] Preferably, the spherical articulated steel support is pasted with a rubber pad on the contact surface with the sleeper, and the rubber pad is tightly attached to the sleeper surface.

[0017] Preferably, the rubber pad is one of natural rubber NR, high-density polyethylene HDPE, ethylene-vinyl acetate copolymer EVA, high-density polyethylene and ethylene-vinyl acetate copolymer mixture HDPE / EVA, and thermoplastic elastomer TPEE with a thickness of 5-10 mm and a static stiffness of 180-200 kN / mm.

[0018] Preferably, the vertical dowel is perpendicular to the track bed plate surface, and the inclined dowel is a 45° inclined dowel.

[0019] Preferably, the vertical dowel is drilled perpendicular to the track bed plate surface, and the 45° inclined dowel is drilled at a 45° angle to the top surface of the track bed plate, with an allowable deviation of ±5°, a drilling diameter of 20-32 mm, a drilling depth of 200-250 mm, and the implanted vertical dowel and 45° inclined dowel are HRB500 grade threaded steel bars with a diameter of 16-28 mm, and the steel bar is embedded to a depth of not less than 150 mm.

[0020] A three-dimensional reinforcement method for sleepers of a high-speed railway ballastless track, which applies the three-dimensional reinforcement device for sleepers of a high-speed railway ballastless track described above, and the reinforcement method comprises the following steps:

[0021] (1) pouring self-leveling fast-hardening mortar on the exposed track bed plate surface at both ends of the sleeper to level;

[0022] (2) drilling and doweling at appropriate positions on both sides of the sleeper after the mortar hardens;

[0023] (3) installing the claw steel frame and fixing it with fixing nuts after the doweling glue hardens;

[0024] (4) then, sequentially and synchronously tightening the longitudinal self-locking bolts and the horizontal self-locking bolts on both sides, and finally tightening the vertical self-locking bolts, so that the tails of the self-locking bolts are tightly attached to the sleeper surface.

[0025] The method of the present application realizes base leveling by pouring self-leveling fast-hardening mortar on the surface of the track bed slab concrete, adopts the form of anchoring to fix the claw steel frame, then sequentially and synchronously tightens the longitudinal, transverse and vertical self-locking bolts, so that the rubber pad plate is tightly attached to the sleeper surface, realizes three-dimensional reinforcement of the sleeper and the safety and stability of the track structure, and has the characteristics of easy disassembly and reusability.

[0026] Preferably, the self-leveling fast-harding mortar is one of polymer cement mortar, magnesium phosphate cement repair mortar, epoxy resin mortar and acrylic resin mortar, and has a 30min compressive strength of ≥5MPa, a 1d compressive strength of ≥20MPa and a 7d compressive strength of ≥40MPa.

[0027] Preferably, the tail of the self-locking bolt is tightly attached to the sleeper surface through the rubber pad plate, and the tight attachment is achieved by adjusting the distance between the bolt and the sleeper through the nut of the head of the self-locking bolt by a torque wrench, and the torque is 100-150N·m, and the self-locking bolt can provide a three-dimensional clamping force of ≥300kN in the horizontal, longitudinal and vertical directions.

[0028] The present application provides a three-dimensional reinforcement device and method for sleepers of high-speed railway ballastless track, and through engineering practice and comparative study, the present application has the following excellent performances compared with the prior art:

[0029] (1) The three-dimensional reinforcement of the sleepers in the horizontal, longitudinal and vertical directions can be realized, and the long-term stability of the track structure during high-speed train operation can be ensured.

[0030] (2) The self-locking bolt is adopted, so that the loosening of the bolt caused by track vibration when the train passes through can be avoided.

[0031] (3) The spherical hinge steel support of the self-locking bolt is pasted with a suitable rubber pad plate, so that the structure damage to the contact surface of the sleeper concrete caused by excessive torque can be effectively avoided without affecting the reinforcement effect.

[0032] (4) The claw steel frame is a whole welded structure, does not need to be assembled on site, has a weight of only 25kg for a single set of reinforcement device, is easy to disassemble, has high installation and disassembly efficiency, and can be reused.

[0033] (5) The application range is wide, and the three-dimensional reinforcement of the sleeper and the turnout sleeper structure in the fields of high-speed railway, ordinary speed railway and the like can be widely applied. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below only illustrate the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative effort based on the provided drawings.

[0035] Figure 1 It is a schematic view of the three-dimensional reinforcing device for the sleeper of the high-speed railway ballastless track.

[0036] Figure 2 It is a schematic view of the three-dimensional reinforcing device for the sleeper of the high-speed railway ballastless track.

[0037] Figure 3 It is a front view of the three-dimensional reinforcing device for the sleeper of the high-speed railway ballastless track.

[0038] Figure 4 It is a side view of the three-dimensional reinforcing device for the sleeper of the high-speed railway ballastless track.

[0039] Figure 5 It is a top view of the three-dimensional reinforcing device for the sleeper of the high-speed railway ballastless track.

[0040] The reference signs are as follows: 1-first base, 2-lower vertical rod, 3-upper horizontal rod, 4-hole one, 5-hole two, 6-longitudinal rod, 7-transverse rod, 8-hole three, 9-second base, 10-vertical self-locking bolt, 11-transverse self-locking bolt, 12-longitudinal self-locking bolt, 13-vertical reinforcing bar, 14-oblique reinforcing bar, 15-fixing nut, 16-rectangular steel pipe, 17-stiffening rib plate, 18-nut, 19-spherical hinged steel support, 20-rubber pad, 21-self-leveling quick-hardening mortar. DETAILED DESCRIPTION

[0041] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0042] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0043] In addition, the terms "first", "second", etc. are used only for descriptive purposes and should not be construed as implying or suggesting relative importance or an indicated number of technical features. Thus, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality" is two or more, unless otherwise specifically limited.

[0044] As shown in Figures 1-5 The present application discloses a kind of high-speed railway ballastless track sleeper three-dimensional reinforcing device, including claw type steel frame, self-locking bolt and planting reinforcement anchoring.

[0045] Claw type steel frame includes a T-shaped base, a vertical L-shaped claw body and two horizontal L-shaped claw bodies, the first base 1 upper part of T-shaped base is vertically connected with the lower vertical rod 2 of vertical L-shaped claw body, the hole one 4 parallel to lower vertical rod 2 is opened in the upper horizontal rod 3 of vertical L-shaped claw body, and the hole two 5 parallel to upper horizontal rod 3 is opened in lower vertical rod 2;The two sides of lower vertical rod 2 perpendicular to the direction of upper horizontal rod 3 are respectively connected with the longitudinal rod 6 of a horizontal L-shaped claw body, the horizontal rod 7 of horizontal L-shaped claw body extends with upper horizontal rod 3, and the hole three 8 parallel to longitudinal rod 6 is opened in horizontal rod 7;Second base 9 vertically connected with first base 1 is parallel to upper horizontal rod 3 and extends in the direction away from upper horizontal rod 3;Vertical hole is opened in the two outer end faces of first base 1 and the outer end face of second base 9 respectively;Oblique hole is opened in the intersection of second base 9 and lower vertical rod 2 on first base 1, and the oblique hole is inclined downward and away from second base 9.

[0046] Further, claw type steel frame is welded by 40mm×70mm rectangular steel pipe 16, and the chamfer is welded and reinforced by reinforcing rib plate 17, and the bottom is anchored on the concrete of roadbed slab by planting reinforcement.

[0047] Self-locking bolt includes a vertical self-locking bolt 10 matched with hole one 4, a horizontal self-locking bolt 11 matched with hole two 5 and two longitudinal self-locking bolts 12 matched with two hole threes 8;The tail of self-locking bolt is in contact with the corresponding sleeper surface, Figure 2 The indicated in the middle A is sleeper.

[0048] Specifically, the structure of vertical self-locking bolt 10, horizontal self-locking bolt 11 and longitudinal self-locking bolt 12 is same, each self-locking bolt is fixed in the corresponding hole of claw type steel frame by thread sleeve, the head of self-locking bolt is hexagonal nut 18, and the tail is spherical articulated steel support 19 in contact with the corresponding sleeper surface.

[0049] Further, spherical articulated steel support 19 is pasted with rubber pad 20 on the contact surface with sleeper, and rubber pad 20 is closely attached to the sleeper surface.

[0050] Further, the rubber pad 20 is one of natural rubber NR, high-density polyethylene HDPE, ethylene-vinyl acetate copolymer EVA, high-density polyethylene and ethylene-vinyl acetate copolymer mixture HDPE / EVA, and thermoplastic elastomer TPEE, with a thickness of 5-10 mm and static stiffness of 180-200 kN / mm.

[0051] The anchoring of the dowel includes three vertical dowels 13 corresponding to the three vertical holes and one oblique dowel 14 corresponding to the oblique hole; the top surface of the track bed plate is provided with vertical plate surface holes and oblique plate surface holes corresponding to the vertical holes and the oblique hole, the dowels pass through the corresponding upper and lower holes and are screwed into the fixing nuts 15 at the upper part to anchor the T-shaped base on the track bed plate concrete.

[0052] Further, the vertical dowel 13 is perpendicular to the surface of the track bed plate, and the oblique dowel 14 is an oblique 45° dowel.

[0053] Further, the vertical dowel 13 is drilled perpendicular to the surface of the track bed plate, and the oblique 45° dowel is drilled at an angle of 45° with the top surface of the track bed plate, with an allowable deviation of ±5°, the diameter of the drilled hole (i.e. the vertical plate surface hole and the oblique plate surface hole) is 20-32 mm, the drilling depth is 200-250 mm, and the implanted vertical dowel 13 and oblique 45° dowel are HRB500 grade threaded steel bars with a diameter of 16-28 mm, and the embedded depth of the steel bar is not less than 150 mm.

[0054] The application further discloses a three-dimensional reinforcing method for the sleeper of the ballastless track of the high-speed railway, which applies the three-dimensional reinforcing device for the sleeper of the ballastless track of the high-speed railway.

[0055] (1) leveling is performed by pouring self-leveling fast-hardening mortar 21 on the exposed track bed plate surface at both ends of the sleeper;

[0056] (2) after the mortar hardens, holes are drilled and dowels are implanted at appropriate positions on both sides of the sleeper;

[0057] (3) after the dowel glue hardens, the claw steel frame is installed and fixed by using the double fixing nuts 15;

[0058] (4) then, the longitudinal self-locking bolts 12 and the transverse self-locking bolts 11 on both sides are sequentially and synchronously tightened, and finally, the vertical self-locking bolts 10 are tightened, so that the tail of the self-locking bolt is tightly attached to the surface of the sleeper.

[0059] Further, the self-leveling fast-hardening mortar 21 is one of polymer cement mortar, magnesium phosphate cement repair mortar, epoxy resin mortar and acrylic resin mortar, with a 30mi compressive strength of ≥5MPa, a 1d compressive strength of ≥20MPa and a 7d compressive strength of ≥40MPa.

[0060] Further, the tail of the self-locking bolt is tightly attached to the sleeper surface through the rubber pad 20. The tight attachment is achieved by adjusting the distance between the bolt and the sleeper through the screw nut 18 on the head of the self-locking bolt using a torque wrench, and the torque is 100-150 N·m, and the three-dimensional clamping force in the horizontal, vertical and vertical directions is ≥300 kN.

[0061] Example 1

[0062] Three-dimensional reinforcing device and reinforcing method for emergency treatment of buried sleeper void of high-speed railway ballastless track in operation

[0063] The three-dimensional reinforcing device is composed of a claw steel frame welded by 40 mm×70 mm rectangular steel pipes 16, one vertical self-locking bolt 10, one horizontal self-locking bolt 11, two longitudinal self-locking bolts 12 and three parts of anchoring.

[0064] The reinforcing method is as follows: first, the concrete at both ends of the sleeper is chipped off, then the exposed track bed plate surface is leveled by pouring 30 min compressive strength 8.2 MPa polymer fast-hardening mortar, after the mortar hardens, holes are drilled on both sides of the sleeper for anchoring, the vertical anchoring 13 should be perpendicular to the track bed plate surface, the oblique 45° anchoring should be drilled at an angle of 45° with the top surface of the track bed plate, with an allowable deviation of ±5°, the drilling diameter is 30 mm, the drilling depth is 200 mm, the diameter of the embedded HRB500 grade threaded steel bar is 25 mm, and the embedded depth of the steel bar is 150 mm; after the anchoring glue hardens, the claw steel frame is installed and fixed with double fixing nuts, then the torque wrench is used to tighten the two longitudinal self-locking bolts 12 and the horizontal self-locking bolt 11 synchronously, and finally the vertical self-locking bolt 10 is tightened, so that the rubber pad 20 at the bottom of the self-locking bolt is tightly attached to the sleeper surface, and the torque is 100 N·m.

[0065] After the three-dimensional reinforcing device is installed according to Example 1, the train operation parameters and sleeper stability parameters are monitored when the train passes, as shown in Table 1. It can be seen that the safety of the track structure meets the requirements of high-speed train passing.

[0066] Table 1 Monitoring data of train operation parameters and sleeper stability parameters in Example 1

[0067] Monitoring item Maximum value Limit value Derailment coefficient 0.14 0.8 Load reduction rate 0.12 0.8 Wheelset lateral force / kN 15.2 / Sleeper vertical displacement (end) / mm 0.15 / Sleeper lateral displacement (end) / mm 0.12 / Sleeper longitudinal displacement (end) / mm 0.10 / Sleeper vertical displacement (middle) / mm 0.08 / Sleeper lateral displacement (middle) / mm 0.08 / Sleeper longitudinal displacement (middle) / mm 0.04 /

[0068] Example 2

[0069] Three-dimensional reinforcing device and reinforcing method for rapid replacement of turnout sleeper of high-speed railway ballastless track in operation

[0070] The three-dimensional reinforcing device is composed of a claw-shaped steel frame welded by 40mm*70mm rectangular steel pipes 16, one vertical self-locking bolt 10, one horizontal self-locking bolt 11, two longitudinal self-locking bolts 12 and anchoring three parts. The self-locking bolts are fixed on the claw-shaped steel frame through threaded sleeves, the top is a hexagonal nut 18, and the bottom is a spherical articulated steel support 19. The steel support is pasted with a TPEE rubber pad 20 with a thickness of 10mm and a static stiffness of 200kN / mm on the contact surface with the frog.

[0071] The reinforcing method is specifically as follows: the concrete around the frog is chiseled off first, then the exposed track bed plate surface is leveled by pouring 30min compressive strength 13.5MPa epoxy resin mortar, the vertical anchoring 13 should be drilled vertically to the track bed plate surface after the mortar hardens, the oblique 45° anchoring should be drilled at an angle of 45° to the top surface of the track bed plate with an allowable deviation of ±5°, the drilling diameter is 25mm, the drilling depth is 250mm, the 20mm HRB500 grade threaded steel is implanted, and the steel is embedded to a depth of 180mm; after the anchoring glue hardens, the claw-shaped steel frame is installed and fixed with double fixing nuts, then the two longitudinal self-locking bolts 12 and the horizontal self-locking bolt 11 are tightened synchronously in turn by a torque wrench, and finally the vertical self-locking bolt 10 is tightened, so that the bottom rubber pad 20 of the self-locking bolt is tightly attached to the frog surface with a torque of 150N·m.

[0072] After the three-dimensional reinforcing device is installed according to Example 2, the train operation parameters and the stability parameters of the frog are monitored on site when the train passes, as shown in Table 2. It can be seen that the safety of the track structure meets the requirements of high-speed train passing.

[0073] Table 2 Train operation parameters and frog stability parameter monitoring data of Example 2

[0074] Monitoring item Maximum value Limit value Derailment coefficient 0.25 0.8 Load reduction rate 0.18 0.8 Wheelset lateral force / kN 13.2 / Sleeper vertical displacement (end) / mm 0.25 / Sleeper lateral displacement (end) / mm 0.17 / Sleeper longitudinal displacement (end) / mm 0.12 / Sleeper vertical displacement (middle) / mm 0.16 / Sleeper lateral displacement (middle) / mm 0.05 / Sleeper longitudinal displacement (middle) / mm 0.08 /

[0075] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the related parts can be referred to the method part.

[0076] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A three-dimensional reinforcing method for high-speed railway ballastless track sleepers, characterized in that, The application discloses a three-dimensional reinforcing device for sleepers of a high-speed railway ballastless track, which comprises a claw type steel frame, self-locking bolts and a steel bar anchoring, wherein the claw type steel frame comprises a T-shaped base, a vertical L-shaped claw body and two horizontal L-shaped claw bodies; a first base upper portion of the T-shaped base is vertically connected with a lower vertical rod of the vertical L-shaped claw body; a hole one parallel to the lower vertical rod is formed in an upper horizontal rod of the vertical L-shaped claw body; a hole two parallel to the upper horizontal rod is formed in the lower vertical rod; a longitudinal rod of each of the two horizontal L-shaped claw bodies is connected with the lower vertical rod on the two sides of the lower vertical rod which is perpendicular to the upper horizontal rod; a horizontal rod of the horizontal L-shaped claw body extends in the same direction as the upper horizontal rod; and a hole three parallel to the longitudinal rod is formed in the horizontal rod; a second base vertically connected with the first base extends in parallel to the upper horizontal rod and away from the upper horizontal rod; vertical holes are formed in the two outer end faces of the first base and one outer end face of the second base; an oblique hole is formed in the intersection of the first base, the second base and the lower vertical rod; the oblique hole is inclined downward and away from the second base; the self-locking bolts comprise a vertical self-locking bolt matched with the hole one, a horizontal self-locking bolt matched with the hole two and two longitudinal self-locking bolts matched with the two hole threes; the tail of the self-locking bolt is in contact with the surface of the sleeper; the steel bar anchoring comprises three vertical steel bars matched with the three vertical holes and one oblique steel bar matched with the oblique hole; a plate surface vertical hole and a plate surface oblique hole corresponding to the vertical hole and the oblique hole are formed in the top surface of the track bed plate; the steel bar is screwed into a fixed nut at the upper portion through the corresponding upper and lower holes, so that the T-shaped base is anchored on the track bed plate concrete. The reinforcing method comprises the following steps: (1) pouring self-leveling fast-hardening mortar on the exposed track bed plate surface at both ends of the sleeper to level; (2) drilling holes and planting steel bars at appropriate positions on both sides of the sleeper after the mortar hardens; (3) installing the claw type steel frame and fixing it with fixed nuts after the steel bar glue hardens; (4) then, the longitudinal self-locking bolts and the horizontal self-locking bolts on both sides are sequentially and synchronously tightened, and finally, the vertical self-locking bolt is tightened, so that the tail of the self-locking bolt is tightly attached to the surface of the sleeper.

2. The method according to claim 1, wherein, The claw type steel frame is welded by rectangular steel pipes, and the chamfered portions are reinforced by welding with reinforcing rib plates.

3. The method according to claim 1, wherein the method is characterized by, The vertical self-locking bolt, the horizontal self-locking bolt and the longitudinal self-locking bolt have the same structure, each of the self-locking bolts is fixed in the corresponding hole in the claw type steel frame through a threaded sleeve, the head of the self-locking bolt is a nut, and the tail of the self-locking bolt is a spherical articulated steel support in contact with the surface of the sleeper.

4. The method according to claim 3, wherein the method is characterized by, A rubber pad is attached to the contact surface between the spherical articulated steel support and the sleeper.

5. The method according to claim 4, wherein the method is characterized by, The rubber pad is one of natural rubber NR, high-density polyethylene HDPE, ethylene-vinyl acetate copolymer EVA, high-density polyethylene and ethylene-vinyl acetate copolymer mixture HDPE / EVA and thermoplastic elastomer TPEE with a thickness of 5-10 mm and static stiffness of 180-200 kN / mm.

6. The method according to claim 1, wherein, The vertical anchor is perpendicular to the surface of the track bed plate, and the oblique anchor is an oblique 45-degree anchor.

7. A three-dimensional reinforcement method for sleepers of high-speed railway ballastless track according to claim 6, characterized in that, The vertical anchor is drilled perpendicular to the surface of the track bed plate, and the oblique 45-degree anchor is drilled at an angle of 45 degrees with the top surface of the track bed plate, with an allowable deviation of ± 5 degrees, a drilling diameter of 20-32 mm, a drilling depth of 200-250 mm, and the embedded vertical anchor and oblique 45-degree anchor being HRB500 grade threaded steel with a diameter of 16-28 mm, and a steel embedding depth of not less than 150 mm.

8. The three-dimensional reinforcement method for sleepers of high-speed railway ballastless track according to claim 1, characterized in that, The self-leveling fast-hardening mortar is one of a polymer cement mortar, a magnesium phosphate cement repair mortar, an epoxy resin mortar, and an acrylic resin mortar, with a 30-minute compressive strength of not less than 5 MPa, a 1-day compressive strength of not less than 20 MPa, and a 7-day compressive strength of not less than 40 MPa.

9. The method according to claim 1, wherein the method is a method for reinforcing a three-dimensional structure of a sleeper of a high-speed railway ballastless track, and the reinforcing material is a fiber reinforced polymer. The tail of the self-locking bolt is tightly attached to the sleeper surface through a rubber pad, and the tight attachment is achieved by adjusting the distance between the bolt and the sleeper through a torque wrench to twist the nut at the head of the self-locking bolt, with a torque of 100-150 N·m and a three-dimensional clamping force in the horizontal, vertical and longitudinal directions of not less than 300 kN.

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