CN113737579A - Site-reconstructed small-radius I-shaped switch rail expansion adjuster and reconstruction construction method thereof - Google Patents

Abstract

The invention discloses a small-radius I-shaped switch rail telescopic regulator modified on site and a modification construction method thereof, wherein the telescopic regulator comprises a continuous large iron plate, a cover plate structure, a base plate assembly and a fastener system, the continuous large iron plate extending along a track bed is anchored on the track bed at the bottom of a track supporting groove, a plurality of base plate assemblies and cover plate structures are arranged along the continuous large iron plate, the base plate assemblies are fixed on the continuous large iron plate through the fastener system, the cover plate structure is fixed on the continuous large iron plate and covers the rail head of a stock rail or a switch rail to the edge area of the track supporting groove, a guide rail brace, a fixed rail brace, the stock rail and the switch rail are fixed on the base plate assembly, the base plate assembly comprises a sliding table base plate and a height-adjusting pad, the height-adjusting pad is arranged between the sliding table base plate and the continuous large iron plate, and the thickness of the height-adjusting pad in each base plate assembly is arranged according to the set height of a vertical curve at a corresponding position. The invention has high site construction speed and can meet the requirements on the vertical curve, the radius of the guide curve, the safety and the like of the telescopic regulator.

Description

Site-reconstructed small-radius I-shaped switch rail expansion adjuster and reconstruction construction method thereof

Technical Field

The invention belongs to the field of railway engineering, and particularly relates to a field-reconstructed small-radius I-shaped switch rail expansion adjuster and a reconstruction construction method thereof.

Background

Because the material is different between bridge and the ground, need set up flexible regulator at the junction now generally when setting up the track, just need transform like this to the track circuit that has not set up flexible regulator in the past just need, add at the junction and establish flexible regulator, promote track circuit operational reliability in the past. Some bridges originally adopt a mixed pavement structure that trains and automobiles can get on the road, and generally adopt groove-shaped rails or I-shaped rails to be buried in the arranged rail bearing grooves, the inside is filled with sandy soil, the top is made of concrete as required to form a supporting pavement, and other parts are paved into the pavement by reinforced concrete with higher strength. At this moment, the transformation scheme can be influenced by the originally arranged track structure, particularly, the reinforced concrete pavement which is difficult to damage and repair causes great limitation to the layout space of the telescopic regulator, and the novel telescopic regulator which is smaller than the prior art in the aspect of the radius of a guide curve on a switch rail and smaller than the width of the telescopic regulator and can be suitable for a reasonable vertical curve track after transformation is required to be arranged by a rail bearing groove used by the original track when in transformation. And the expansion regulator is modified, and because the existing bridge also needs to consider the requirement that the construction process can be provided with passing automobiles, the modification can be carried out only in a limited skylight period in the use process of the bridge, so that the improvement on the structure and the construction mode is needed, and the construction efficiency is greatly improved.

Disclosure of Invention

The invention aims to provide a small-radius I-shaped switch rail telescopic regulator for field transformation, which is used for solving the technical problems that the original rail bearing groove space is insufficient and the available skylight period in the transformation process is limited in the prior art when the telescopic regulator is additionally arranged for the transformation of a steel rail on a mixed pavement, so that the transformation feasibility is influenced on the premise of ensuring safety and reliability.

The small-radius I-shaped switch rail telescopic regulator for field transformation comprises a continuous large iron plate, a cover plate structure, a base plate assembly and a fastener system, wherein a steel rail bearing groove is formed in a transformed field pavement, the upper anchor of a track bed at the bottom of the track bearing groove is fixedly arranged along the track bed extending from the track bed, the continuous large iron plate is provided with a plurality of base plate assemblies and cover plate structures, the continuous large iron plate is arranged, the base plate assemblies are fixed on the continuous large iron plate through the fastener system, the cover plate structure is fixed on the continuous large iron plate to cover the base rail or the rail head of the switch rail arrives at the area at the edge of the track bearing groove, guide rail supports, fixed rail supports, base rails and switch rails are fixed on the base plate assemblies, the base plate assemblies comprise sliding table base plates and heightening pads, the heightening pads are arranged between the sliding table base plates and the continuous large iron plate, the thickness of the height-adjusting cushion in each cushion plate assembly is set according to the set height of the vertical curve at the corresponding position.

Preferably, the apron structure includes the vertical welding and is in supporting seat on the big iron plate in succession and fix through the bolt apron at supporting seat top, the apron includes work limit apron and non-work limit apron, non-work limit apron is located telescopic adjustment ware leans on outer one side to be horizontal plate one, work limit apron includes horizontal plate two and L template, the headspace that supplies the wheel rim to pass through is left to work limit to horizontal plate two, the vertical portion welding of L template is in horizontal plate two bottoms and the horizontal part is followed the railhead bottom surface of butt at the tongue or stock rail that correspond is stretched out to the headspace below.

Preferably, the apron arrives be equipped with waterproof sealing strip one between the opening part lateral wall of support rail groove, L template is equipped with waterproof sealing strip two to between the railhead bottom surface, the non-working side cover board is equipped with waterproof sealing strip three to between the railhead of stock rail, waterproof sealing strip two with the elastic compressible stroke of waterproof sealing strip three with the railhead of stock rail suits at the lateral deviation distance that flexible in-process produced.

Preferably, the switch rail is formed by cutting and transforming a rail with the same type as the stock rail, the height of the switch rail is the same as that of the stock rail, and the joint surface of the butt joint and the joint surface of the rail bottom of the stock rail and the rail head of the switch rail have the same guide curve.

Preferably, the guide rail support is arranged on the outer side of the stock rail, the bottom of the guide rail support is fixed on the base plate assembly through an elastic clamp fixed by a bolt, and a support part of the guide rail support is supported on the side surface of the rail web of the stock rail; the supporting part of the guide rail support is provided with three protruding support points for supporting the stock rail, the protruding support points comprise upper protruding support points and lower protruding support points which respectively correspond to the upper end and the lower end of the rail waist, the supporting part further comprises bottom protruding support points which correspond to the upper portion of the extending part of the rail bottom, the upper protruding support points and the lower protruding support points are abutted to the rail waist under the normal condition, and gaps are reserved between the bottom protruding support points and the rail bottom.

Preferably, the fixed rail brace comprises a switch rail fixed rail brace, the bottom of the fixed rail brace is welded on the base plate assembly, the supporting part of the switch rail fixed rail brace is fixed on the rail web of the switch rail, the rail bottom side surface of the switch rail is abutted to the bottom side surface of the switch rail fixed rail brace, a rigid buckle clamp is further fixed on the bottom of the switch rail fixed rail brace, and the rigid buckle clamp is pressed on the switch rail bottom and the bottom simultaneously.

The invention also provides a reconstruction construction method adopting the small-radius I-shaped switch rail telescopic regulator, which comprises the following steps:

step one, removing the peripheral pavement of the original track;

cutting off the original steel rail and removing the sleeper part protruding out of the bed surface of the track bed;

step three, the pre-assembling part of the telescopic regulator is integrally dropped into the rail bearing groove;

the pre-assembly part of the telescopic regulator comprises a continuous large iron plate, a base plate assembly, a stock rail, a switch rail, a guide rail support, a fixed rail support, a positioning plate and a fastener system, wherein the base plate assembly, the stock rail, the switch rail, the guide rail support, the fixed rail support, the positioning plate and the fastener system are fixedly assembled on the continuous large iron plate in advance in a factory building;

drilling holes in the ballast bed through hole sites arranged on the continuous large bottom plate, and implanting spike nails for anchoring;

step five, pouring high-strength epoxy resin-based mortar into the bottom of the continuous large bottom plate;

step six, connecting steel rails;

and step seven, arranging a drain pipe and a cover plate structure.

Preferably, when the preassembly part is assembled, the rail bottom surface, the upper protruding support point and the lower protruding support point of the stock rail are coated with lubricating grease after the assembly of the stock rail and the guide rail support is completed, the positioning plate is placed on the base plate assembly after the assembly of the stock rail and the guide rail support is completed, the positioning plate is fixed through bolts and is enabled to be abutted against the side face of the bottom of the guide rail support, and then the positioning plate is welded and fixed with the bottom of the guide rail support.

Preferably, in the first step, the track bed surface at the bottom of the rail bearing groove is exposed after cleaning; in the second step, one part of the sleeper is higher than the surface of the track bed, and for the condition, only the part of the sleeper protruding out of the surface of the track bed is cut and removed; and fifthly, leveling the bottom of the continuous large iron plate, and simultaneously controlling the thickness of the high-strength epoxy resin-based mortar to ensure that the stock rail and the switch rail are aligned with the original steel rails reserved at two ends of the connecting telescopic regulator.

Preferably, in the seventh step, a plurality of supporting seats are welded on the continuous large iron plate, the supporting seats are arranged between adjacent backing plate assemblies, then the drain pipes are arranged on two sides of the continuous large iron plate, the cover plate provided with the mode sealing strips is fixed at the top of the supporting seats through bolts, it is guaranteed that the first waterproof sealing strips compress the side walls of the opening of the rail bearing grooves, the second waterproof sealing strips compress the bottom surfaces of the switch rails or the rail heads of the stock rails on the corresponding sides, and the third waterproof sealing strips compress the rail heads on the corresponding sides of the stock rails.

The invention has the following advantages: the invention puts the whole body into the previously dug and constructed rail bearing groove in one step after the base plate assembly, the fastener system, the guide rail brace, the fixed rail brace, the stock rail and the switch rail are assembled and fixed on the continuous large iron plate, and quickly anchors the base rail and the track bed at the bottom of the base rail, and before construction, the parameter detection in various aspects such as position, length, radian and the like can be carried out in a factory, so that the parameters of the telescopic regulator completed before construction are ensured to meet the construction requirements, and the structural parameters of the telescopic regulator are ensured to meet the technical requirements.

The invention adopts the structure and the installation mode of the guide rail brace and the fixed rail brace, and can ensure the supporting or fixing effect under the condition of reducing the extending distance of the rail brace to the side surface. The guide rail brace utilizes the bottom protruding brace point to extrude and limit the rail bottom obliquely and downwards when moving outwards, so that the rail bottom of the stock rail is allowed to move outwards a little within a safety range when being stretched, the key positions of the rail web and the rail bottom of the stock rail are effectively supported after moving outwards for a certain distance, and the outward-inclining distortion effect of the stock rail head is further reduced by combining the improvement of the switch rail structure. Therefore, the width and the occupied space of the telescopic regulator can be reduced on the premise of ensuring the safety requirement of the telescopic regulator, and the telescopic regulator is suitable for the transformation condition that the space of the rail bearing groove is limited.

And finally, an improved transformation construction scheme is adopted, the pre-assembly part is integrally placed for construction, the construction efficiency is greatly improved, parameters of all parts meet requirements, and meanwhile, high-strength epoxy resin-based mortar is poured into the bottom of the continuous large iron plate for leveling, so that the effect of stably supporting the large iron plate can be realized without carefully transforming the surface of the ballast bed. The cover plate structure and the construction method thereof adopted by the invention realize the effects of effective water prevention and drainage and convenient maintenance, and keep the normal traffic requirement of the mixed pavement.

Drawings

Fig. 1 is a schematic structural diagram of a small-radius i-shaped switch rail expansion adjuster modified on site.

Fig. 2 is a cross-sectional view in the direction a-a of the structure shown in fig. 1.

Fig. 3 is a cross-sectional view in the direction B-B of the structure shown in fig. 1.

Fig. 4 is a cross-sectional view in the direction C-C of the structure shown in fig. 1.

Fig. 5 is a schematic view showing an anchoring structure of a continuous large iron plate in the structure shown in fig. 1.

Fig. 6 is a schematic structural diagram of a cover plate structure in the structure shown in fig. 1.

Fig. 7 is a top view of the structure shown in fig. 6.

Fig. 8 is a schematic structural view of the elastic clip in the structure shown in fig. 1.

Fig. 9 is a schematic view showing the arrangement of the drain pipes in the structure shown in fig. 1.

Fig. 10 is a schematic view of the present invention when disposed in a rail groove.

The labels in the figures are: 1. switch rail, 2, stock rail, 3, continuous big iron plate, 4, fastener system, 41, gauge block, 5, waterproof sealing strip, 6, rigid buckle clamp, 61, step structure, 62, bulge structure, 7, guide rail brace, 8, fixed rail brace, 9, positioning plate, 10, heightening pad, 11, spike, 12, high-strength epoxy resin-based mortar, 13, non-working side cover plate, 14, working side cover plate, 15, supporting seat, 16, drain pipe, 17, ballast bed, 18 and sleeper.

Detailed Description

The following detailed description of the present invention will be given in conjunction with the accompanying drawings, for a more complete and accurate understanding of the inventive concept and technical solutions of the present invention by those skilled in the art.

As shown in fig. 1-10, the invention provides a field-modified small-radius i-shaped tongue expansion and contraction regulator, which comprises a continuous large iron plate 3, a cover plate structure, a base plate assembly and a fastener system 4, wherein a road surface on a modification field is provided with a rail bearing groove for arranging a steel rail, the continuous large iron plate 3 extending along the rail bearing 17 is anchored on a track bed 17 at the bottom of the rail bearing groove, a plurality of base plate assemblies and the cover plate structure are arranged along the continuous large iron plate 3, the base plate assemblies are fixed on the continuous large iron plate 3 through the fastener system 4, the cover plate structure is fixed on the continuous large iron plate 3 and covers the rail head of the stock rail 2 or the tongue 1 to the area at the edge of the rail bearing groove, the base plate assemblies are fixed with a guide rail brace 7, a fixed rail brace 8, the stock rail 2 and the tongue 1, the base plate assemblies comprise a sliding table base plate and an elevation adjusting pad 10, the height-adjusting pad 10 is arranged between the sliding table base plate and the continuous large iron plate 3, and the thickness of the height-adjusting pad 10 in each base plate assembly is set according to the set height of a vertical curve at a corresponding position.

Above-mentioned structure lets the telescopic adjustment ware after the equipment can all be in backing plate subassembly, fastener system 4 and guide rail props 7, fixed rail props 8, stock rail 2 and switch rail 1 the fixed back integration of equipment is put into the rail bearing groove of digging the construction earlier in succession on continuous big iron plate 3 to quick and the railway roadbed 17 anchor of its bottom, and can carry out position, length, radian etc. many-sided parameter detection in the factory before the construction, the parameter of the telescopic adjustment ware of accomplishing before guaranteeing to construct accords with the construction requirement, thereby guaranteeing that telescopic adjustment ware structural parameter satisfies technical requirement, and practice thrift the construction time. On the other hand, the continuous large iron plate 3 facilitates the setting of a subsequent cover plate structure, the cover plate structure is convenient to modify, the road surface still meets the mixed road surface requirement of normal passing trains and automobiles, the normal use of the telescopic regulator can be ensured, the construction time is effectively saved, and multiple purposes are achieved. Step-shaped bulges are arranged on two sides of the backing plate component, and the backing plate component is tightly pressed and fixed by the fastener system 4 through the gauge blocks 41 pressed on the step-shaped bulges.

The fixed rail brace 8 comprises a point rail 1 fixed rail brace 8 (as shown in fig. 3), the bottom of the fixed rail brace 8 is welded on the base plate component, the supporting part of the point rail 1 fixed rail brace 8 is fixed on the rail web of the point rail 1, the rail bottom side surface of the point rail 1 is abutted against the bottom side surface of the point rail 1 fixed rail brace 8, a rigid buckle 6 is further fixed on the bottom of the point rail 1 fixed rail brace 8, and the rigid buckle 6 is pressed at the same time on the point rail 1 bottom and the bottom. The switch rail 1 is formed by cutting and transforming a rail with the same type as the stock rail 2, the height of the switch rail is the same as that of the stock rail 2, the stock rail 2 is in contact with the joint surface of the switch rail 1 through the guide curve, and the joint surface of the rail bottom of the stock rail 2, which is also in butt joint with the rail bottom of the switch rail 1 and is also in the same guide curve with the joint surface of the rail head. When stock rail 2 stretches like this, not only railhead, the rail end also receives the outside effort that stretches and arouses, and upper and lower both ends homoenergetic can avoid single position atress to cause obvious railhead to lean out the effect of distortion.

Fixed rail props 8 still includes 2 fixed rail props 8 of stock rail (as shown in fig. 4), the supporting part of 2 fixed rail props 8 of stock rail supports the web of rail side of stock rail 2, guide rail props 7 and locates the outside of stock rail 2, the elasticity clamp that bolt fastening is passed through to the bottom of guide rail props 7 is fixed on the backing plate subassembly, the supporting part of guide rail props 7 supports the web of rail side of stock rail 2.

The switch rail 1 is effectively fixed by the structure, the stock rail 2 is effectively clamped, the outward deformation and outward inclination degree of the stock rail is restrained in the stretching process, the fixed strength of the fixed rail brace 8 and the backing plate assembly is effectively enhanced by the welding and fixing structure, the fixed rail brace 8 can be reduced to extend the distance to the side face, the fixed structures such as an iron base and a rail brace bolt are omitted, the fixed structure of the fixed rail brace 8 is further simplified, and more space is prevented from being occupied.

The supporting part of the guide rail support 7 is provided with three protruding support points for supporting the stock rail 2, the protruding support points comprise upper protruding support points and lower protruding support points which respectively correspond to the upper end and the lower end of the rail waist, and bottom protruding support points which correspond to the upper part of the extending part of the rail bottom, the upper protruding support points and the lower protruding support points are abutted to the rail waist under normal conditions, and gaps are reserved between the bottom protruding support points and the rail bottom. The bottom outside of guide rail props 7 to leave the location area between the corresponding side of backing plate subassembly, be fixed with locating plate 9 on the location area, locating plate 9 is close to 2 one sides of stock rail with the bottom outside welding of guide rail props 7.

The elastic clamp is fixed on the backing plate assembly through the square-neck anti-rotation bolt, a T-shaped groove matched with the square-neck structure of the square-neck anti-rotation bolt is arranged on the backing plate assembly, and the trapezoidal groove is transversely arranged. Elasticity presss from both sides and is close to one side of stock rail 2 is equipped with the pressure and is in the portion of compressing tightly and the opposite side bottom surface of the bottom of guide rail props 7 is equipped with the pressure and is in convex structure 62 on the backing plate subassembly, the portion of compressing tightly is equipped with stair structure 61, the bottom of guide rail props 7 is equipped with the elasticity and presss from both sides the mounting hole, elasticity press from both sides mounting hole one side be equipped with the step groove of stair structure 61 cooperation butt and the opposite side lateral wall leaves the clearance between the side that corresponds with the elasticity clamp, the elasticity is pressed from both sides and is kept away from 2 one side of stock rail extremely the distance at the top of convex structure 62 is less than the pore wall of bolt mounting hole reaches on the elasticity clamp the distance at the top of convex structure 62.

The structure is used for installing the guide rail brace 7, the bottom protruding brace points are utilized to extrude and limit the rail bottom in the oblique lower direction when the rail bottom moves outwards, the rail bottom of the basic rail 2 is allowed to move outwards in a safety range a little when the rail bottom is stretched, the key positions of the rail web and the rail bottom of the basic rail 2 are effectively supported after moving outwards for a certain distance, and the outward-inclining distortion effect of the rail head of the basic rail 2 is further reduced by combining the improvement of the structure of the switch rail 1. The contact surface of the guide rail brace 7 and the rail web is reduced, but the influence on the supporting effect is small, so that the danger caused by excessive camber can be avoided while the telescopic resistance of the bent part is reduced, and the stock rail 2 is well reset when being contracted. Similarly, the elastic clamp is also used for limiting and supporting the bottom of the guide rail support 7, when the guide rail support 7 tilts outwards under the action of the stock rail 2, the elastic clamp can slightly elastically rotate by taking the protruding structure 62 as a fulcrum to absorb outward pressure, the acting force of the elastic clamp on the guide rail support 7 can effectively drive the guide rail support 7 to return when contracting, the positioning plate 9 also serves as the bottom for blocking the guide rail support 7 after welding, and the outward acting force generated by the stock rail 2 is mainly converted into the elastic torsion of the guide rail support 7 which can return instead of horizontal sliding which can cause abrasion and is difficult to return. The structure improves the service life of the guide rail support 7 and the stock rail 2, and the telescopic regulator can still be kept to meet the safety requirement under the condition that the lateral extension distance of the guide rail support 7 is reduced. By combining the reconstruction of the fixed rail brace 8 and the switch rail 1, the telescopic regulator can meet the requirements on the regulating effect and the safety and reliability by a smaller width, and is suitable for reconstructing a rail bearing groove with limited space.

The apron structure is including the vertical welding the supporting seat 15 on the continuous big iron plate 3 with fix through the bolt the apron at supporting seat 15 top, the apron includes work limit apron 14 and non-work limit apron 13, non-work limit apron 13 is located telescopic adjustment ware leans on outer one side to be horizontal plate one, work limit apron 14 includes horizontal plate two and L template, horizontal plate two leaves the headspace that supplies the wheel rim to pass through to the work limit, the vertical portion welding of L template is in horizontal plate two bottoms and the horizontal part is followed the headspace below is stretched out the butt and is corresponding the railhead bottom surface of switch rail 1 or stock rail 2. Because the mixed road surface that the train car all can pass through before reforming transform, consequently adopt above-mentioned apron structure to support when passing through the car through the apron, do not influence the operation of flexible regulator, the reservation space lets the train can normally pass through simultaneously. The height of the non-working edge cover plate 13 is lower than the base rail 2 tread surface in consideration of vertical wear of the rail and false rim effect of the wheel, for example, the non-working edge pedal is arranged 20mm lower than the base rail 2 tread surface, and the working edge pedal is arranged to be flush with the base rail 2 tread surface. Considering that the wheel rim moves a certain distance left and right in operation, the transverse horizontal distance of the corresponding reserved space is set to 65mm, so that the operation of the wheel rim on the working edge is not influenced.

The apron arrives be equipped with waterproof sealing strip 5 one between the opening part lateral wall of support rail groove, L template is equipped with waterproof sealing strip 5 two to the railhead bottom surface between, non-work edge cover board 13 is equipped with waterproof sealing strip 5 three to the railhead of stock rail 2 between, waterproof sealing strip 5 two with the compressible stroke of elasticity of waterproof sealing strip 5 three with the lateral deviation distance that the railhead of stock rail 2 produced at flexible in-process suits. The fastener system 4 leaves little room to the rail groove side walls for placement of the drain pipe 16. Each waterproof sealing strip 5 including waterproof sealing strip 5 one, waterproof sealing strip 5 two and waterproof sealing strip 5 three all adopts the sealed glue of polyurethane to make, can reduce the inside intake of this telescopic adjustment ware, plays the water proof function, and 4 both sides of fastener system are located to drain pipe 16, then the drain pipe 16 that the backing plate subassembly is lower in water follow both sides position discharges rapidly, avoids the adverse effect to telescopic adjustment ware. Since the curved portion of the stock rail 2, in particular the rail head portion, is displaced outwards during the telescoping process, the waterproof seal 5 with a sufficient elastic compression stroke is used to ensure sufficient waterproofing and normal use of the telescopic adjuster.

The invention also provides a reconstruction construction method for reconstructing by adopting the small-radius I-shaped switch rail telescopic regulator, which comprises the following steps.

Step one, removing the peripheral pavement of the original track. And (3) paving on two sides of the track is destroyed and removed in a track section area prepared for arranging the telescopic regulator until the part which is difficult to destroy due to the arrangement of reinforced concrete is removed, and the bed surface of the track bed 17 at the bottom of the track supporting groove is exposed after the part is removed.

And step two, cutting off the original steel rail and removing the part of the sleeper 18 protruding out of the bed surface of the track bed 17. And cutting off the original steel rail left in the removed area, and removing the corresponding steel rail mounting structure. The normally laid rails will mostly be provided with sleepers 18, a part of the sleepers 18 being higher than the bed surface of the track bed 17, in which case only the part of the sleepers 18 projecting above the bed surface of the track bed 17 is cut out and removed.

And step three, integrally dropping the pre-assembled part of the telescopic regulator into the rail bearing groove. The pre-assembled part of the telescopic regulator comprises a continuous large iron plate 3, a base plate assembly which is pre-fixedly assembled on the continuous large iron plate 3 in a factory building, a stock rail 2, a point rail 1, a guide rail brace 7, a fixed rail brace 8, a positioning plate 9 and a fastener system 4. Because these parts have been assembled in advance in the factory building and detected to it is whole after assembling on continuous big iron plate 3 to fall into the support rail groove, consequently can effectively guarantee that telescopic regulator satisfies the vertical curve requirement of settlement, telescopic regulator width requirement.

When the pre-assembled parts are assembled, the stock rail 2 is arranged behind the fixed point rail 1, and the stock rail 2 is arranged

The bottom surface of the rail bottom of the stock rail 2, the upper protruding support points and the lower protruding support points are coated with lubricating grease after the assembly of the stock rail 2 and the guide rail support 7 is completed, the positioning plate 9 is placed on the base plate assembly after the assembly of the stock rail 2 and the guide rail support 7, the positioning plate 9 is fixed through bolts and is guaranteed to be abutted against the side face of the bottom of the guide rail support 7, and then the positioning plate 9 is welded and fixed with the bottom of the guide rail support 7.

And step four, drilling holes on the ballast bed 17 through hole sites arranged on the continuous large bottom plate, and implanting spikes 11 for anchoring. Hole sites are arranged between adjacent backing plate assemblies, and after the holes are punched, the spiral spike 11, the insulating sleeve, the washer and the cap nut are arranged to finish anchoring of the spike 11.

And step five, pouring high-strength epoxy resin-based mortar 12 into the bottom of the continuous large bottom plate. Therefore, the bottom of the continuous large iron plate 3 is leveled, and the continuous large iron plate 3 can obtain stable support. The top of the flat continuous large iron plate 3 controls the stock rail 2 and the switch rail 1 on the flat continuous large iron plate to recheck the requirements of the telescopic regulator on the vertical curve through the heightening pad 10. And meanwhile, the thickness of the high-strength epoxy resin-based mortar 12 is controlled, so that the stock rail 2 and the switch rail 1 are aligned with the original steel rails reserved at two ends of the connecting telescopic regulator.

And step six, connecting the steel rails. The cut end of the original steel rail is transformed into a freezing joint, the stock rail 2 and the switch rail 1 on the telescopic regulator are adopted as the freezing joint, and the original steel rail is fixedly connected with the stock rail 2 or the switch rail 1 through the freezing joint.

And step seven, arranging a drain pipe 16 and a cover plate structure. A plurality of supporting seats 15 are welded on the continuous large iron plate 3, the supporting seats 15 are arranged between adjacent backing plate assemblies, then drain pipes 16 are arranged on two sides of the continuous large iron plate 3, the cover plate provided with the mode sealing strips is fixed at the top of the supporting seats 15 through bolts, it is guaranteed that the first waterproof sealing strip 5 compresses the side wall of the opening of the rail bearing groove, the second waterproof sealing strip 5 compresses the bottom surface of the switch rail 1 or the stock rail 2 on the corresponding side, and the third waterproof sealing strip 5 compresses the rail head on the corresponding side of the stock rail 2. Therefore, the waterproof drainage effect is better, the construction is convenient, sufficient support is provided for equipment such as automobiles running on the rail bearing groove, the internal structure can be inspected and maintained only by taking down the cover plate during maintenance, and the maintenance is convenient.

By adopting the reconstruction construction method, the pre-assembled part of the telescopic regulator is assembled into a whole through the continuous large iron plate 3 and then is placed into the rail bearing groove, so that the construction time is greatly reduced, and the construction requirement of shorter skylight period is met. Meanwhile, high-strength epoxy resin-based mortar 12 is poured into the bottom of the continuous large iron plate 3 for leveling, so that the effect of stably supporting the large iron plate can be realized without carefully modifying the bed surface of the ballast bed 17, and the defects that the vertical curve of the telescopic regulator is difficult to control and the time consumption is more due to the fact that the cushion plate assembly is independently arranged are overcome. And the cover plate structure is being installed and constructed after being placed into the pre-assembly part, so that the drain pipe 16 can be conveniently arranged, the setting effect of the waterproof sealing strip 5 can be effectively ensured, and the proper waterproof sealing strip 5 can be conveniently and timely replaced when the gap is too large or too small to influence the setting of the waterproof sealing strip 5. In conclusion, the improved telescopic regulator structure is combined with a transformation construction method, so that the problem that the telescopic regulator meets the requirements of safety and regulation functions when the space is limited is solved, the on-site transformation construction process is simplified, the construction efficiency is greatly improved, the construction can be completed by utilizing a short skylight period, and the effects of effective waterproof drainage and convenient maintenance can be realized on the premise of ensuring the operation of the telescopic regulator after the construction.

The invention is described above with reference to the accompanying drawings, it is obvious that the specific implementation of the invention is not limited by the above-mentioned manner, and it is within the scope of the invention to adopt various insubstantial modifications of the inventive concept and solution of the invention, or to apply the inventive concept and solution directly to other applications without modification.

Claims (10)

1. The utility model provides a small radius I shape switch rail expansion and contraction regulator of on-the-spot transformation which characterized in that: including big iron plate (3) in succession, apron structure, backing plate subassembly and fastener system (4), reform transform the site road surface and have the rail supporting groove that sets up the rail, the anchor has the edge on track bed (17) of rail supporting groove bottom the track bed (17) extends big iron plate in succession (3), a plurality of the backing plate subassembly with the apron structure is followed big iron plate in succession (3) set up, the backing plate subassembly passes through fastener system (4) are fixed on big iron plate in succession (3), the apron structure is fixed cover on big iron plate in succession (3) stock rail (2) or the railhead of switch rail (1) arrives the region at rail supporting groove edge, be fixed with direction rail brace (7), fixed rail brace (8), stock rail (2) and switch rail (1) on the backing plate subassembly, the backing plate subassembly includes the slip table backing plate and increases pad (10), heightening pads (10) are arranged between the sliding table base plate and the continuous large iron plate (3), and the thickness of the heightening pads (10) in each base plate assembly is set according to the set height of a vertical curve at a corresponding position.

2. The field-remodeled small-radius i-shaped point rail expansion and contraction adjuster according to claim 1, wherein: the apron structure includes that vertical welding is in supporting seat (15) on continuous big iron plate (3) and fix through the bolt the apron at supporting seat (15) top, the apron includes work limit apron (14) and non-work limit apron (13), non-work limit apron (13) are located flexible regulator leans on outer one side to be horizontal plate one, work limit apron (14) are including horizontal plate two and L template, horizontal plate two leaves the headspace that supplies the wheel rim to pass through to the work limit, the vertical portion welding of L template is in horizontal plate two bottoms and the horizontal part is followed the headspace below is stretched out the butt and is stretched out the railhead bottom surface at the sharp rail (1) or stock rail (2) that correspond.

3. A field-rebuilt small radius i-shaped point rail expansion and contraction regulator as defined in claim 2, wherein: the apron arrives be equipped with waterproof sealing strip (5) one between the opening part lateral wall of support rail groove, L template is equipped with waterproof sealing strip (5) two to between the railhead bottom surface, non-working edge cover board (13) are equipped with waterproof sealing strip (5) three to between the railhead of stock rail (2), waterproof sealing strip (5) two with the compressible stroke of elasticity of waterproof sealing strip (5) three with the lateral deviation distance that the railhead of stock rail (2) produced is in flexible in-process suits.

4. A field-rebuilt small-radius i-shaped point rail expansion and contraction adjuster according to any one of claims 1 to 3, wherein: switch rail (1) adopts the track cutting transformation the same with stock rail (2) model to form, and highly the same with stock rail (2), stock rail (2) rail foot and switch rail (1) rail foot looks butt and the binding face of the two railhead parts have the same curve of leading.

5. The on-site retrofit small radius i-shaped point rail expansion and contraction adjuster according to claim 4, wherein: the guide rail support (7) is arranged on the outer side of the stock rail (2), the bottom of the guide rail support (7) is fixed on the base plate assembly through an elastic clamp fixed by a bolt, and a support part of the guide rail support (7) is supported on the side surface of the rail web of the stock rail (2); the supporting part of guide rail props (7) has three protrusion brace points and is used for supporting stock rail (2), the protrusion brace point is including corresponding the last protrusion brace point and the lower protrusion brace point at upper and lower both ends of rail waist respectively, still including corresponding the end protrusion brace point above the extension portion at the rail end, under the general condition go up the protrusion brace point with protrusion brace point butt is on the rail waist down, end protrusion brace point with leave the clearance between the rail end.

6. A field-rebuilt small radius i-shaped point rail expansion and contraction regulator according to claim 5, wherein: fixed rail brace (8) are including switch rail (1) fixed rail brace (8), the bottom welding of fixed rail brace (8) is in on the backing plate subassembly, the supporting part of switch rail (1) fixed rail brace (8) is fixed on the rail web of switch rail (1), the rail end side butt of switch rail (1) is in the bottom side of switch rail (1) fixed rail brace (8), still be fixed with rigidity buckle clamp (6) on the bottom of switch rail (1) fixed rail brace (8), rigidity buckle clamp (6) are pressed simultaneously switch rail (1) end of a rail with on the bottom.

7. A reconstruction construction method using the small-radius i-shaped point rail expansion and contraction regulator according to claim 6, characterized in that: comprises the following steps:

step one, removing the peripheral pavement of the original track;

cutting off the original steel rail, and removing the part of the sleeper (18) protruding out of the bed surface of the track bed (17);

step three, the pre-assembling part of the telescopic regulator is integrally dropped into the rail bearing groove;

the pre-assembly part of the telescopic regulator comprises a continuous large iron plate (3), a base plate assembly, a stock rail (2), a switch rail (1), a guide rail brace (7), a fixed rail brace (8), a positioning plate (9) and a fastener system (4), wherein the base plate assembly, the stock rail, the switch rail (1), the guide rail brace (7), the fixed rail brace (8) and the fastener system are fixedly assembled on the continuous large iron plate (3) in advance in a factory building;

drilling holes on the ballast bed (17) through hole sites arranged on the continuous large bottom plate, and implanting spikes (11) for anchoring;

step five, pouring high-strength epoxy resin-based mortar (12) into the bottom of the continuous large bottom plate;

step six, connecting steel rails;

and step seven, arranging a drain pipe (16) and a cover plate structure.

8. The reconstruction construction method adopting the small-radius I-shaped switch rail expansion adjuster as claimed in claim 7, wherein: when the preassembly part is assembled, the bottom surface of the rail bottom of the stock rail (2), the upper protruding support point and the lower protruding support point are coated with lubricating grease after the stock rail (2) and the guide rail support (7) are assembled, the positioning plate (9) is placed on the base plate assembly after the stock rail (2) and the guide rail support (7) are assembled, the positioning plate (9) is fixed through bolts and is guaranteed to be abutted against the side face of the bottom of the guide rail support (7), and then the positioning plate (9) is welded and fixed with the bottom of the guide rail support (7).

9. The reconstruction construction method adopting the small-radius I-shaped switch rail expansion adjuster as claimed in claim 7, wherein: in the first step, the bed surface of the track bed (17) at the bottom of the track supporting groove is exposed after cleaning; in the second step, one part of the sleeper (18) is higher than the surface of the track bed (17), and for the condition, only the part of the sleeper (18) which protrudes out of the surface of the track bed (17) is cut and removed; and fifthly, leveling the bottom of the continuous large iron plate (3), and simultaneously controlling the thickness of the high-strength epoxy resin-based mortar (12) to ensure that the stock rail (2) and the switch rail (1) are aligned with the original steel rails reserved at two ends of the connection telescopic regulator.

10. The reconstruction construction method adopting the small-radius I-shaped switch rail expansion adjuster as claimed in claim 7, wherein: in the seventh step, weld a plurality of supporting seats (15) on big iron plate (3) in succession, supporting seat (15) are located between the adjacent backing plate subassembly, then set up drain pipe (16) above big iron plate (3) both sides in succession, the apron that the rethread bolt will be equipped with the mode sealing strip is fixed at supporting seat (15) top, guarantee that waterproof sealing strip (5) one compresses tightly the lateral wall of rail bearing groove opening part, the railhead bottom surface of switch rail (1) or stock rail (2) of corresponding side is compressed tightly to waterproof sealing strip (5) two, the railhead of corresponding side of stock rail (2) is compressed tightly to waterproof sealing strip (5) three.

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