CN117107562A - Method for replacing high-speed rail curve super-high section ballastless track plate - Google Patents

Abstract

The invention provides a method for replacing a high-speed railway curve ultra-high section ballastless track plate, which relates to the technical field of railway ballastless track structure repair and comprises the following steps: early sunroof: pre-planting a threaded rod, pouring a leveling platform, chiseling wide and narrow joints, and clamping and limiting a track plate; day skylight development: the method comprises the steps of entering a rail train, assembling an in-situ crane, loosening fasteners, installing rail pulling equipment, transversely pulling rails, stripping, lifting and moving out a rail plate, resetting a steel rail, temporarily supporting, installing a rail pulling device, pulling out the steel rail, cleaning a mortar layer, resetting the rail plate, resetting the steel rail, temporarily supporting, combining the rail train, finely adjusting the rail plate, re-pouring the mortar layer and recovering and adjusting a line; and (3) carrying out the following sunroof: chiseling off a leveling platform, repairing a line-to-line sealing layer, planting ribs on a track plate in a plate changing area, pouring a wide-narrow seam, and finely adjusting the track. The invention overcomes the technical barriers that the heavy CRTS II template is difficult to replace in the prior art, and realizes the safe and rapid replacement of the slab ballastless track slab.

Description

Method for replacing high-speed rail curve super-high section ballastless track plate

Technical Field

The invention belongs to the technical field of railway ballastless track structure repair, and particularly relates to a method for replacing a high-speed rail curve super-high section ballastless track plate.

Background

Along with the construction and traffic of ballastless tracks of important main high-speed railways such as jinghu, beijing Dan Wu, hada and the like, the ballastless tracks are put into use on a large scale in the gradual construction of the high-speed railway network in China. The slab ballastless track structure is a main structural form adopted by the construction of high-speed railways in China and mainly comprises CRTS I type, II type and III type slab ballastless tracks. The CRTS I type slab ballastless track is a slab ballastless track structure type in which a prefabricated track slab is paved on a cast-in-situ reinforced concrete base, is adjusted through a mortar filling layer and is limited through a convex baffle; the CRTS II type slab ballastless track is in a longitudinal slab ballastless track structure form of a track slab paved on a concrete supporting layer (roadbed and tunnel) paved on site or a reinforced concrete base (bridge) poured on site through a cement asphalt mortar filling layer; the CRTS III slab ballastless track is a slab ballastless track structure type in which a precast concrete track slab with reserved connection reinforcing steel bars is paved on a cast-in-situ reinforced concrete base or a concrete supporting layer, and a self-compaction concrete filling layer is arranged in the middle. However, with the extension of the service time, under the comprehensive factors of temperature stress, train load, environmental weathering, insufficient material congenital quality and the like, the individual track slabs can be subjected to degradation conditions such as cracks, falling blocks and the like, and great potential safety hazards exist, and when the degradation is to a certain degree, the damaged track slabs need to be replaced so as to ensure the safety, stability and long-term durability of the ballastless track.

Because the high-speed railway operation line can only carry out maintenance work in the skylight time, the skylight time is limited (generally only 4 h), the high-speed railway on-road condition is strict, the equipment size is limited by the size of a passage door and the height of a contact network, and large-scale equipment cannot be on-road operated; in addition, most of high-speed rails are viaducts, and the high-speed rails can only pass through a channel door and stairs arranged at a certain distance to go up and down to work at a track maintenance operation site, and additionally, more tools can cause more time waste when going to and from the operation site and moving various tools up and down, so that the maintenance and maintenance work efficiency of operating the high-speed rails is affected. Because the skylight time is limited, the track slab replacement procedure is complex, and how to adopt a reliable technical scheme to ensure temporary recovery of the circuit after the skylight is finished and on-time opening of the circuit is important. Therefore, how to safely and rapidly replace the plate-type ballastless track plate is a problem to be solved in the field.

Disclosure of Invention

Aiming at the problems, the invention provides a method for replacing the ballastless track slab of the high-speed railway curve super-high section, which creatively applies the technology for replacing the ballastless track slab of the high-speed railway to the curve super-high section, overcomes the technical barriers that the prior art is difficult to replace a heavier CRTS II slab, and realizes the safe and rapid replacement of the slab ballastless track slab.

In order to achieve the purpose, the invention discloses a method for replacing a high-speed rail curve super-high section ballastless track plate, which comprises the following steps:

pouring two groups of leveling platforms on two sides of the track plate to be replaced in the early-stage skylight time;

chiseling a wide-narrow seam and a side stop block between the track plate to be replaced and an adjacent track plate, and installing a clamping limiting device on the track plate to be replaced;

day skylight time, the rail car set is admitted to the ground, includes: the first rail car drives a first fixed rail crane, a first rail car, a second fixed rail crane and a second rail car which are sequentially connected with the first rail car to enter a construction range, the rail car group is dissociated, the first fixed rail crane and the second fixed rail crane are respectively fixed on two groups of leveling platforms to form an in-situ hoisting unit, and the first rail car, the second rail car and the second rail car are driven away from the construction range;

loosening the fastener of the ballastless track plate according to the preset loosening length of the fastener, installing rail shifting equipment, and transversely shifting and limiting the steel rail through the rail shifting equipment;

removing the clamping limiting device of the track plate to be replaced, and stripping, lifting and removing the track plate to be replaced through the in-situ hoisting unit;

resetting the steel rail, dismantling the rail pulling equipment, screwing the loosened fastener in, and temporarily supporting the steel rail at the position of the rail plate to be replaced by adopting a wooden sleeper;

the second track car pushes the first track car and the second track car to enable the first track car to travel to the position of the track slab to be replaced, the in-situ hoisting unit places the track slab to be replaced on the first track car, the second track car continues to push the second track car to enable the second track car to be located under the in-situ hoisting unit, and the in-situ hoisting unit hoists a new track slab on the second track car;

the second track car continues pushing, so that the first track car and the second track car drive away from the construction range, the fasteners of the ballastless track plates are loosened again according to the predetermined fastener loosening length, and the transverse shifting and limiting of the steel rail at the position of the track plate to be replaced are performed again;

the in-situ hoisting unit falls down the new track plate, installs the new track plate, resets the steel rail, removes rail pulling equipment and screws in the loosened fastener.

As a further improvement of the invention, the actual locking rail temperature and the actual rail temperature are tested and compared for the early skylight time, and the fastener loosening length is determined to obtain the predetermined fastener loosening length.

As a further development of the invention, the two sets of leveling platforms are symmetrical with respect to a center line of the rail to be replaced, which is perpendicular to the direction of travel.

As a further improvement of the invention, in the early-stage skylight time, a threaded rod is pre-planted on a support layer at the position and at the outer side of the leveling platform to be poured, and then the leveling platform is poured based on the pre-planted threaded rod.

The first fixed track crane and the second fixed track crane are fixed on the leveling platform through bolt fixing devices.

After the new track slab is installed, the original position lifting machine set is removed, the first fixed track crane and the second fixed track crane are restored, the first track car and the second track car both travel to the middle construction range and meet and are recombined with the first fixed track crane, the first track flat car, the second track flat car and the second fixed track crane in the middle one by one to form a track set, and the track set is driven to return by the second track car.

As a further improvement of the invention, chiseling the concrete of the front and rear wide and narrow joints of the track slab to be replaced, unlocking the tensioning locking piece, and removing concrete ash and sundries in the wide joints;

and the two sides of the track plate to be replaced are provided with compression limiting devices.

As a further improvement of the invention, the track pulling device comprises a hydraulic pushing device and a slideway;

the installation is dialled rail equipment and is included:

a set of track shifting equipment is arranged on two adjacent track plates of the track plate to be replaced;

the hydraulic pushing device is arranged between the first rail bearing platform and the second rail bearing platform of the adjacent rail plates of the rail plates to be replaced, and the slideway is arranged between the rail bearing platforms beside the hydraulic pushing device.

As a further improvement of the present invention, the transverse rail pulling and limiting device for the rail comprises:

pushing the steel rail by using hydraulic pushing equipment to push the steel rail into place;

and after the steel rail is pushed in place, limiting and fixing are carried out on the slideway.

As a further improvement of the invention, the rail plate to be replaced is stripped, lifted and removed; comprising the following steps:

after the clamping limiting device of the track plate to be replaced is removed, the mortar at the position of the fine adjustment claw of the track plate to be replaced is clearly removed, and the track plate to be replaced is lifted by a jack so that the track plate to be replaced is stripped from the mortar layer;

two groups of C-shaped lifting appliances for the track plate to be replaced are arranged on the track plate to be replaced, the two groups of C-shaped lifting appliances for the track plate to be replaced are connected with the track plate to be replaced in a fastening mode, and the in-situ lifting unit is used for lifting the track plate to be replaced to complete lifting and moving out of the track plate to be replaced.

As a further improvement of the invention, the in-situ hoisting machine unit falls down the new track plate, installs the new track plate, resets the steel rail, removes rail pulling equipment and screws the loosened fastener; comprising the following steps:

after the new track plate is lifted, removing the temporarily supported wooden sleeper, and removing the CA mortar layer at the position of the track plate to be replaced, so as to ensure that the top surface of the base plate at the position of the track plate to be replaced is flat and clean;

cushion blocks are respectively arranged on the base plate and the supporting layer, and the thickness of the cushion blocks is the same as that of the mortar layer;

the in-situ hoisting unit places the new track plate on a cushion block and dismantles a C-shaped hoisting tool of the track plate;

and (5) removing the rail pulling equipment and the slideway, and screwing the loosened fastener in the construction range.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, the construction organization is optimized, the construction procedures are simplified and concentrated in two skylights, so that the procedure connection and the number of upper construction tools are reduced, and the construction efficiency is improved; in addition, a reliable temporary transition scheme is adopted, so that the line can be opened on time after the skylight is ended, and the influence of the broken track on the normal operation of the train is avoided.

The invention improves the equipment performance, and overcomes the technical barriers that the prior art mainly aims at lighter CRTS I templates, but is difficult to replace heavier CRTS II templates.

The invention enhances the applicability of equipment and creatively applies the ballastless track plate replacement technology of the high-speed railway to the ultra-high section of the curve.

Drawings

FIG. 1 is a flow chart of a method for replacing a high-speed rail curve ultra-high section ballastless track plate disclosed by an embodiment of the invention;

FIG. 2 is a schematic plan view of a leveling platform for an outside of a track slab to be replaced according to an embodiment of the present invention;

FIG. 3 is a schematic plan view of a pre-planted threaded rod according to one embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of a leveling platform for an outside of a track slab to be replaced according to one embodiment of the present invention;

FIG. 5 is a schematic diagram of a rail consist disclosed in one embodiment of the present invention;

FIG. 6 is a schematic diagram of an in-situ crane set installation structure according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a mounting structure of a rail shifting apparatus according to an embodiment of the present invention;

FIG. 8 is a schematic view of a temporary support structure employing a wooden pillow according to one embodiment of the present invention;

FIG. 9 is a schematic illustration of lifting a new track slab on a second rail wagon in accordance with an embodiment of the present invention;

fig. 10 is a plan view showing the placement of the bar planting on the new track slab after the installation of the new track slab according to an embodiment of the present invention.

Reference numerals illustrate:

1. the track plate is to be replaced; 2. a mortar layer; 3. a support layer; 4. a wide-narrow seam; 5. pre-planting a threaded rod; 6. leveling the platform; 7. a compression limiting device; 8. a first railcar; 9. temporarily supporting; 10. a first stationary rail hoist; 11. a new track plate; 12. a bar planting pin; 13. a first rail flatcar; 14. a second rail flatcar; 15. a second stationary rail hoist; 16. a second railcar; 17. hydraulic pushing equipment; 18. a slideway; 19. c-shaped lifting appliance for track plate; 20. and (5) lifting the unit in situ.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The invention is described in further detail below with reference to the attached drawing figures:

as shown in fig. 1, the method for replacing the high-speed rail curve super-high section ballastless track plate disclosed by the invention comprises the following steps:

early sunroof time:

as shown in fig. 3, two groups of leveling platforms 6 are poured on two sides of the track slab 1 to be replaced;

chiseling the wide and narrow joints 4 and side stops between the track plate 1 to be replaced and the adjacent track plates, and installing a clamping limiting device for the track plate 1 to be replaced, as shown in fig. 4;

day skylight time:

the rail car entrance, as shown in fig. 5, includes: the first rail car 8 drives the first fixed rail crane 10, the first rail flatcar 13, the second rail flatcar 14, the second fixed rail crane 15 and the second rail car 16 which are sequentially connected with the first rail car 8 to enter a construction range, wherein the first rail car 8 is stopped at a position where the line is suitable for hoisting the first fixed rail crane 10 and the second fixed rail crane 15 (the position is commonly confirmed by a hoisting operation point line longitudinal slope, an ultrahigh and a structure), then the rail car group is detached and transferred to a preset place, the first fixed rail crane 10 and the second fixed rail crane 15 are respectively fixed on two groups of leveling platforms 6, as shown in fig. 6 and 9, an in-situ hoisting unit is formed, and the first rail car 8, the first rail flatcar 13, the second rail flatcar 14 and the second rail car 16 are driven out of the construction range;

loosening the fasteners of the ballastless track plate according to the preset loosening length of the fasteners, and installing rail shifting equipment, wherein the rail is transversely shifted and limited by the rail shifting equipment as shown in fig. 7;

removing a clamping limiting device of the track plate 1 to be replaced, and stripping, lifting and removing the track plate 1 to be replaced through an in-situ hoisting unit;

resetting the steel rail, removing the rail pulling device, screwing the loosened fastener in, and temporarily supporting the steel rail at the position of the track board 1 to be replaced by adopting a wooden sleeper 9, as shown in fig. 8;

the second track car 16 pushes the first track car 13 and the second track car 14 to enable the first track car 13 to travel to the position of the track slab 1 to be replaced, the original position hoisting unit places the track slab 1 to be replaced on the first track car 13, the second track car 16 continues to push, the second track car 14 is located under the original position hoisting unit, and the original position hoisting unit hoistes a new track slab 11 on the second track car 14, as shown in fig. 9;

the second track car 16 continues pushing, so that the first track car 13 and the second track car 14 are driven away from the construction range, the fasteners of the ballastless track plate are loosened again according to the predetermined fastener loosening length, and the transverse track shifting and limiting are carried out again on the steel rail at the position of the track plate 1 to be replaced;

the in-situ hoisting machine unit falls down the new track plate 11, installs the new track plate 11, resets the steel rail, removes the rail pulling equipment, and screws the loosened fastener.

Wherein,

and testing and comparing the actual locking rail temperature and the actual rail temperature at the early skylight time, and determining the fastener loosening length to obtain the predetermined fastener loosening length.

The two sets of leveling platforms 6 are symmetrical with respect to a median line of the track to be replaced perpendicular to the direction of travel.

And in the early-stage skylight time, pre-planting a threaded rod 5 on the position of the leveling platform 6 to be poured and the support layer 3 on the outer side, and then pouring the leveling platform 6 based on the pre-planted threaded rod 5.

The first fixed rail crane 10 and the second fixed rail crane 15 are fixed on the leveling platform 6 through bolt fixing devices.

When the wooden pillow is adopted to temporarily support the steel rail at the position of the track board 1 to be replaced, the wooden pillow with the section of 220mm multiplied by 260mm and the length of 3m is used as the temporary support 9, and the clearance between the wooden pillows is 110-180cm.

When the original position lifting machine set 20 controls the new track plate 11 to fall into position, the measurement facilities can be accurately controlled and assisted, so that the positioning precision of the new track plate 11 meets the requirement, and the fine adjustment of the new track plate 11 is avoided.

Further, the method comprises the steps of,

after the new track slab 11 is installed, the original position lifting machine set 20 is removed, the first fixed track crane 10 and the second fixed track crane 15 are restored, the first track car 8 and the second track car 16 both travel to the middle construction range, meet and are recombined with the first fixed track crane 10, the first track car 13, the second track car 14 and the second fixed track crane 15 in the middle one by one to form a track set, and the second track car 16 drives the track set to return.

Chiseling the concrete of the front and rear wide and narrow joints 4 of the track slab 1 to be replaced, unlocking the tensioning locking piece, and removing concrete ash and sundries in the wide joints;

the two sides of the track plate 1 to be replaced are provided with compression limiting devices 7, which are specifically as follows: the track plates are buckled and limited left and right, and three compressing limiting devices are respectively arranged on two sides of each track plate, so that the track plates are prevented from transversely shifting in the transitional running process.

Still further, the method comprises the steps of,

(1) The track pulling device comprises a hydraulic pushing device 17 and a slideway 18; the installation is dialled rail equipment and is included:

a set of track shifting equipment is arranged on two adjacent track plates of the track plate 1 to be replaced;

the hydraulic pushing device is arranged between the first rail bearing platform and the second rail bearing platform of the adjacent rail plates of the rail plate 1 to be replaced, and the slideway 18 is arranged between the rail bearing platforms beside the hydraulic pushing device.

(2) Carry out horizontal rail and spacing to the rail through dialling rail equipment, include:

pushing the steel rail by using a hydraulic pushing device 17 to push the steel rail into place;

after the steel rail is pushed in place, limiting and fixing are carried out on the slideway 18.

(3) Stripping, lifting and removing the track plate 1 to be replaced; comprising the following steps:

after the clamping limiting device of the track plate 1 to be replaced is removed, the mortar at the position of the fine adjustment claw of the track plate 1 to be replaced is clearly removed, and the track plate 1 to be replaced is lifted by a jack, so that the track plate 1 to be replaced is stripped from the mortar layer 2;

two groups of track plate C-shaped lifting devices are arranged on the track plate 1 to be replaced, the track plate 1 to be replaced is fastened and connected with the track plate 1 to be replaced through the two groups of track plate C-shaped lifting devices, the lifting device of the in-situ lifting unit 20 is connected with the two groups of track plate C-shaped lifting devices, the track plate 1 to be replaced is lifted, and the lifting and the moving out of the track plate 1 to be replaced are completed.

Wherein,

the two groups of C-shaped lifting appliances of the track boards can be connected to lifting holes or anchor bolt holes of the track boards 1 to be replaced, and can also be fixed on the side surfaces of the track boards through specific tools.

Further, the method comprises the steps of,

the lifting device of the in-situ lifting unit 20 can accurately control the lifting or falling of the track plate; the lifting device can be lifted by power or manpower.

The in-situ lifting machine set 20 is provided with a protection device for preventing the track plate from falling in the lifting or falling process of the track plate 1 to be replaced; the rail plate is also provided with a mechanical protection device for preventing the rail plate from falling in the transportation process of the rail plate.

The in-situ lifting unit 20 can lift the track slabs to a certain height, wherein the lifting height is determined by the ultrahigh quantity of the line, the type of the track slabs, the type of the track structures and the longitudinal transportation intersection mode of the new track slabs and the old track slabs along the line, and the height is not less than 40cm.

(4) The in-situ hoisting machine unit falls down a new track plate 11, installs the new track plate 11, resets the steel rail, removes rail pulling equipment, and screws the loosened fasteners; comprising the following steps:

after the new track plate 11 is lifted, removing the wooden sleeper of the temporary support 9, and removing the CA mortar layer 2 at the position of the track plate 1 to be replaced, so as to ensure that the top surface of the base plate at the position of the track plate 1 to be replaced is flat and clean;

cushion blocks are respectively arranged on the base plate and the supporting layer 3, and the thickness of the cushion blocks is the same as that of the mortar layer 2;

the in-situ hoisting unit places the new track plate 11 on the cushion block and removes the C-shaped hoisting tool 19 of the track plate;

the rail pulling device and the slideway 18 are removed, and the loosened fastener in the construction range is screwed in.

Example 1:

under the actions of temperature stress and train fatigue load, a CRTS II type track of a certain high-speed railway bridge section has a plurality of transverse cracks, side surface splitting has oblique cracks, and replacement and maintenance are needed. The construction flow for replacing the track plate by adopting the technology is shown in the figure 1, and the concrete contents are as follows:

early skylight time, carrying out preparation stage work:

1) Locked rail temperature test and initial data acquisition

The actual locking rail temperature detection system of the seamless line is adopted to test the actual locking rail temperature, the actual temperature of the steel rail is tested, the actual locking rail temperature is compared with the actual locking rail temperature, the loosening length of the fastener is determined, and the monitoring sensor is installed.

2) Track slab position determination and annotation

And measuring and marking the plane and the elevation position of the damaged track plate, wherein the damaged track plate is the track plate 1 to be replaced, and the data record of the relative position between the track plate 1 to be replaced and the adjacent track plate is prepared.

3) Reversal checking of bar planting condition of track plate in plate changing area

And rechecking the condition of the bar planting of the track plate in the construction area. Because the plate changing area and the rail plates on the two sides are finished to plant the ribs, no anchoring area is arranged at this time.

4) Pre-planted threaded rod 5

As shown in fig. 2, threaded rods are perforated and implanted on the support layers 3 on both sides of the track plate to be replaced. The punching is vertical to the supporting layer 3, and the center positions of a group of threaded rods are aligned according to the transverse center positions of the leveling platforms 6 to be poured. And cleaning the inside of the hole, and implanting a threaded rod after injecting the bar planting glue, wherein the error is +/-5 mm. After the leveling platforms 6 are poured, threaded rods are implanted on the leveling platforms 6 on two sides of the track plate to be replaced and the interline and line outer sealing layers, the threaded rods are implanted on the interline and line outer sealing layers, the threaded rods are perpendicular to the sealing layers during punching, and the center positions of the threaded rods are aligned with the transverse center positions of the leveling platforms 6.

5) Leveling platform 6 pouring

As shown in fig. 3 and 4, 4 leveling platforms 6 are correspondingly poured at the positions of the pre-planted threaded rods 5 on two sides of the track plate 1 to be replaced, wherein the number of the leveling platforms is 2 between the lines, the number of the leveling platforms is 2 outside the lines, and the overall height of the top surface of the leveling platforms is 150mm lower than the height of the inner strand rail top. And when the leveling platform 6 is poured, the elevation of the top surface of the leveling platform is measured and controlled, and the top surface of the buttress concrete is on the same horizontal plane and is flat.

6) Chiseling of wide and narrow joints 4 and lateral stops

And chiseling out concrete of the front and rear wide and narrow joints 4 of the damaged track slab 1 to be replaced, unlocking the tensioning locking piece, and removing concrete ash and sundries in the wide joints.

7) Clamping limit for track plate 1 to be replaced

The two sides of the track plate 1 to be replaced are provided with compressing limiting devices, the track plate 1 to be replaced is buckled and limited left and right, and three compressing limiting devices are respectively arranged on the two sides of the single track plate 1 to be replaced, so that the track plate 1 to be replaced is prevented from transversely shifting in the transitional operation process.

Day skylight time, carrying out work of an implementation stage:

1) Entrance of rail train set

As shown in fig. 5, the rail car is grouped in the following manner: first rail car 8+ first stationary rail car 10+ first rail car 13+ second rail car 14+ second stationary rail car 15+ second rail car 16. The rail train set is driven by a first rail car 8, sent out from a station, enters from an uplink line, and has a parking position at the position of an uplink line to be replaced by a rail plate. After the power failure, the track car group is dissociated, the first track car 8 is driven out of the construction range after dissociation, and the second track car 16 and the flat car are driven out of the construction section after the in-situ lifting machine group 20 is assembled.

Assembly in situ handling unit 20

As shown in fig. 6, the supporting legs on two sides of the track cranes on the first fixed track crane 10 and the second fixed track crane 15 are respectively placed at the longitudinal center positions on the two groups of leveling platforms 6, are fixed by adopting a bolt fixing device, are assembled by a cross beam and a lifting appliance, and are obliquely and fixedly pulled on two sides of the two track cranes. And fine adjustment is performed after assembly, so that the beam of the in-situ crane set 20 is ensured to be horizontal and vertical to the line center line.

3) Rail pulling device for loosening fasteners and installing rail pulling device

And adopting an automatic composite clamp to remove fasteners in a certain range before and after plate replacement in sequence and storing the fasteners in sequence. The hydraulic pushing equipment 17 is installed between the first rail bearing platform and the second rail bearing platform of the adjacent rail plates at the two sides of the rail plate to be replaced while the fastener is removed, 2 sets of sliding ways 18 are installed in total, as shown in fig. 7, the sliding ways 18 are installed beside the adjacent pushing equipment first, and a group of sliding ways 18 are installed on the other rail plates.

4) Transverse shifting rail

When the compound clamp removes the fastener to a certain distance, the hydraulic pushing equipment 17 is used for pushing the steel rail, the steel rail is pushed in place according to the pushing requirement, and the steel rail is limited and fixed on the slideway 18 after the compound clamp is in place.

5) Stripping, lifting and removing the track plate

And (3) removing the clamping device of the rail plate to be replaced, removing the mortar at the position of the fine adjustment claw of the rail plate to be replaced, and lifting the rail plate to be replaced by a jack to be stripped from the mortar layer 2. And C-shaped lifting appliances 19 for the track slabs are arranged, the old track slabs are lifted by using an in-situ lifting machine, and the old track slabs are carefully protected during lifting.

6) Rail resetting, temporary support 9

As shown in fig. 8, the old track slab is lifted, then the rail is reset, the rail pulling device and the slideway 18 are removed, and the loose fastener of the slab replacing part is screwed in by adopting an automatic compound clamp. Meanwhile, a wooden sleeper is adopted to temporarily support the steel rail at the position of the track board to be replaced 9.

7) Rail flatcar in place and new rail plate 11 is lifted

As shown in fig. 9, the second rail car 16 pushes the first rail car 13 to the plate replacement position, the original position crane places the old rail plate on the first rail car 13, and then the second rail car 16 moves to make the second rail car 14 loading the new rail plate 11 be located under the original position crane set 20, and the original position crane set 20 lifts the new rail plate 11.

8) Rail for flat car to be driven away and pulled away

The second track car 16 pulls the first track flat plate and the second track flat car 14 to leave the construction position, after the composite clamp is dismantled and the fastener is dismantled to a certain distance, the hydraulic pushing equipment 17 is used for pushing the steel rail, the steel rail is pushed into place according to the pushing requirement, and the steel rail is limited and fixed on the slideway 18 after the steel rail is pushed into place.

9) Cleaning the mortar layer 2

After the track slab is lifted, the wooden pillow of the temporary support 9 is removed, and tools such as an electric pick, a blower and a polisher are adopted to remove the CA mortar layer 2 under the track slab, so that the top surface of the base plate is smooth and clean.

10 New track plate 11 reset

After the mortar layer 2 is cleaned, the new track plate 11 is reset by the in-situ crane set 20. And cushion blocks are respectively arranged between the track plate and the supporting layer 3, the thickness of the cushion blocks is the same as that of the mortar layer 2, the track crane places a new track plate 11 on the cushion blocks, and the C-shaped lifting appliance 19 of the track plate is removed.

11 Rail resetting

After the new track slab 11 is installed, the steel rail is reset, the rail pulling equipment and the slideway 18 are removed, and the loose fasteners of the slab replacing part are screwed in by adopting an automatic compound clamp.

12 Rail car assembly

The first rail car 8 and the second rail car 16 on the two sides travel to the plate replacing position for combination, meanwhile, the original position lifting machine set 20 is removed, the vehicles are loaded after the removal, and finally the rail cars return.

13 Fine tuning of track slab and reperfusion of mortar layer 2

The track plate fine adjustment, the track plate compaction, the plate bottom cleaning and the edge sealing work around the plate are carried out, and then the polymer cement mortar can be poured. And dismantling the fine adjustment correction device below the track plate after the minimum compressive strength of the mortar reaches 1 MPa. And (5) retesting the space state of the track slab after filling the filling layer with mortar. The deviation between the elevation adjustment amount and the design elevation adjustment amount after the track slab is poured is-0.5 mm, the allowable deviation of the line adjustment amount in the design of the line adjustment amount is 1mm, and the allowable range is met.

14 Line restoration adjustment)

The automatic compound clamp is used for screwing the loosened fasteners before and after plate replacement in sequence according to the original sequence, the rail inspection trolley is used for testing the loosened fastener sections, and the line condition meets the operation requirement.

And (5) the subsequent skylight time, and performing work of a recovery stage:

1) Chiseling leveling platform 6

And the tools such as an electric pick and the like are adopted, the leveling platform 6 is manually matched with the chiseling, concrete scraps are uniformly filled into the woven bags after chiseling, the steel bars are removed, and the steel bars are cleaned and transported away.

2) Reinforcement is planted to trade board district track board

And (3) planting bars on the track plate in the plate replacement area, drilling holes perpendicular to the surface of the track plate by using a drilling machine, and planting the bars by using pins, wherein the arrangement of the planted bars is shown in figure 10.

3) Pouring wide and narrow joints 4

And cleaning the joint area and the grouting holes of the track slab, and performing wetting treatment. And C55 concrete is used for longitudinal connection and hole filling of the track slab, and the concrete casting height of the narrow joint is about 60mm lower than the upper edge of the track slab.

And tensioning the tendons in the track plate after the strength of the mortar reaches 9MPa and the strength of the narrow-joint concrete reaches 20 MPa. And finally filling the joints and the grouting holes with concrete materials, and wiping the concrete surface with the track plate to keep the appearance of the track plate clean.

4) And (5) fine adjustment of the track.

And (3) fine-tuning the steel rail to meet the smoothness requirement.

The invention has the advantages that:

the invention realizes the replacement of the track slab at the ultrahigh section of the bridge section curve in two to three skylight points through the combination of the track car, the track crane and the track flatcar. The seamless connection between the dismantling of the old plate and the installation of the new plate is realized through the rail car combination form of rail car-rail crane-rail flat car-rail crane-rail car, and the operation efficiency is ensured while the scale of the tooling is reduced. The method is flexible and reliable in application, two track cranes are in a group, the accuracy and safety of the hoisting process are guaranteed, equipment such as limiting devices and electric boxes existing between special sections such as bridges can be avoided, and stable operation of the track crane under the condition of curve superelevation is realized by means of the advanced setting of the leveling platform. The method is quick, practical, reliable, cost-effective and high in applicability, and the replacement of the unit plate type heavy CRTS II ballastless track plate is realized under the condition that the steel rail is not cut off in the skylight time. The method changes the traditional method, namely, the replacement of the lighter CRTS I template is realized by cutting the steel rail or by a gantry crane group, solves the problem of lower overall replacement efficiency caused by more working procedures of the skylight, long working procedure connection time consumption and the like, can realize the replacement of the track plate at the ultrahigh section of the curve, can greatly improve the construction efficiency, and ensures the completion in two to three skylights. The safe and reliable temporary support is arranged in the construction process, so that the train can run at the speed of 80km/h after the skylight is finished, and the smooth line and the running safety are ensured.

According to the invention, the construction organization is optimized, the construction procedures are simplified and concentrated in two skylights, so that the procedure connection and the number of upper construction tools are reduced, and the construction efficiency is improved; in addition, a reliable temporary transition scheme is adopted, so that the line can be opened on time after the skylight is ended, and the influence of the broken track on the normal operation of the train is avoided.

The invention improves the equipment performance, and overcomes the technical barriers that the prior art mainly aims at lighter CRTS I templates, but is difficult to replace heavier CRTS II templates.

The invention enhances the applicability of equipment and creatively applies the ballastless track plate replacement technology of the high-speed railway to the ultra-high section of the curve.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A method for replacing a high-speed rail curve super-high section ballastless track plate is characterized by comprising the following steps:

pouring two groups of leveling platforms on two sides of a track plate to be replaced in the early-stage skylight time;

chiseling a wide-narrow seam and a side stop block between the track plate to be replaced and an adjacent track plate, and installing a clamping limiting device on the track plate to be replaced;

day skylight time, the rail car set is admitted to the ground, includes: the first rail car drives a first fixed rail crane, a first rail car, a second fixed rail crane and a second rail car which are sequentially connected with the first rail car to enter a construction range, the rail car group is dissociated, the first fixed rail crane and the second fixed rail crane are respectively fixed on two groups of leveling platforms to form an in-situ hoisting unit, and the first rail car, the second rail car and the second rail car are driven away from the construction range;

loosening the fastener of the ballastless track plate according to the preset loosening length of the fastener, installing rail shifting equipment, and transversely shifting and limiting the steel rail through the rail shifting equipment;

removing the clamping limiting device of the track plate to be replaced, and stripping, lifting and removing the track plate to be replaced through the in-situ hoisting unit;

resetting the steel rail, dismantling the rail pulling equipment, screwing the loosened fastener in, and temporarily supporting the steel rail at the position of the rail plate to be replaced by adopting a wooden sleeper;

the second track car pushes the first track car and the second track car to enable the first track car to travel to the position of the track slab to be replaced, the in-situ hoisting unit places the track slab to be replaced on the first track car, the second track car continues to push the second track car to enable the second track car to be located under the in-situ hoisting unit, and the in-situ hoisting unit hoists a new track slab on the second track car;

the second track car continues pushing, so that the first track car and the second track car drive away from the construction range, the fasteners of the ballastless track plates are loosened again according to the predetermined fastener loosening length, and the transverse shifting and limiting of the steel rail at the position of the track plate to be replaced are performed again;

the in-situ hoisting unit falls down the new track plate, installs the new track plate, resets the steel rail, removes rail pulling equipment and screws in the loosened fastener.

2. The method for replacing the high-speed rail curve ultra-high section ballastless track slab according to claim 1, wherein the method comprises the following steps: and testing and comparing the actual locking rail temperature and the actual rail temperature at the early skylight time, and determining the fastener loosening length to obtain the predetermined fastener loosening length.

3. The method for replacing the high-speed rail curve ultra-high section ballastless track slab according to claim 1, wherein the method comprises the following steps: the two groups of leveling platforms are symmetrical relative to the middle line of the track to be replaced, which is perpendicular to the running direction.

4. The method for replacing the high-speed rail curve ultra-high section ballastless track slab according to claim 1, wherein the method comprises the following steps: pre-planting a threaded rod on a position where a leveling platform needs to be poured and a supporting layer on the outer side of the leveling platform in the early-stage skylight time, and then pouring the leveling platform based on the pre-planted threaded rod;

the first fixed track crane and the second fixed track crane are fixed on the leveling platform through bolt fixing devices.

5. The method for replacing the high-speed rail curve ultra-high section ballastless track slab according to claim 1, wherein the method comprises the following steps: after the new track slab is installed, the in-situ lifting machine set is removed, the first fixed track crane and the second fixed track crane are restored, the first track car and the second track car both travel to the middle construction range, meet one by one with the first fixed track crane, the first track flatcar, the second track flatcar and the second fixed track crane in the middle and are recombined into a track set, and the track set is driven to return by the second track car.

6. The method for replacing the high-speed rail curve ultra-high section ballastless track slab according to claim 1, wherein the method comprises the following steps: chiseling the concrete of the front and rear wide and narrow joints of the track slab to be replaced, unlocking the tensioning locking piece, and removing concrete ash and sundries in the wide joints;

and the two sides of the track plate to be replaced are provided with compression limiting devices.

7. The method for replacing the high-speed rail curve ultra-high section ballastless track slab according to claim 1, wherein the method comprises the following steps: the track shifting equipment comprises hydraulic pushing equipment and a slideway;

the installation is dialled rail equipment and is included:

a set of track shifting equipment is arranged on two adjacent track plates of the track plate to be replaced;

the hydraulic pushing device is arranged between the first rail bearing platform and the second rail bearing platform of the adjacent rail plates of the rail plates to be replaced, and the slideway is arranged between the rail bearing platforms beside the hydraulic pushing device.

8. The method for replacing the high-speed rail curve ultra-high section ballastless track slab of claim 7, wherein the method comprises the following steps: the device for transversely shifting and limiting the steel rail through the rail shifting equipment comprises:

pushing the steel rail by using hydraulic pushing equipment to push the steel rail into place;

and after the steel rail is pushed in place, limiting and fixing are carried out on the slideway.

9. The method for replacing the high-speed rail curve ultra-high section ballastless track slab according to claim 1, wherein the method comprises the following steps: stripping, lifting and removing the track plate to be replaced; comprising the following steps:

after the clamping limiting device of the track plate to be replaced is removed, the mortar at the position of the fine adjustment claw of the track plate to be replaced is clearly removed, and the track plate to be replaced is lifted by a jack so that the track plate to be replaced is stripped from the mortar layer;

two groups of C-shaped lifting appliances for the track plate to be replaced are arranged on the track plate to be replaced, the two groups of C-shaped lifting appliances for the track plate to be replaced are connected with the track plate to be replaced in a fastening mode, and the in-situ lifting unit is used for lifting the track plate to be replaced to complete lifting and moving out of the track plate to be replaced.

10. The method for replacing the high-speed rail curve ultra-high section ballastless track slab according to claim 1, wherein the method comprises the following steps: the in-situ hoisting unit falls down the new track plate, installs the new track plate, resets the steel rail, removes rail pulling equipment and screws in the loosened fastener; comprising the following steps:

after the new track plate is lifted, removing the temporarily supported wooden sleeper, and removing the CA mortar layer at the position of the track plate to be replaced, so as to ensure that the top surface of the base plate at the position of the track plate to be replaced is flat and clean;

cushion blocks are respectively arranged on the base plate and the supporting layer, and the thickness of the cushion blocks is the same as that of the mortar layer;

the in-situ hoisting unit places the new track plate on a cushion block and dismantles a C-shaped hoisting tool of the track plate;

and (5) removing the rail pulling equipment and the slideway, and screwing the loosened fastener in the construction range.