CN111041909B

CN111041909B - Ballast turnout inserting and laying construction method

Info

Publication number: CN111041909B
Application number: CN201911286305.2A
Authority: CN
Inventors: 杨菊山; 张利杰; 杨茜茜
Original assignee: CRCC High Tech Equipment Corp Ltd
Current assignee: CRCC High Tech Equipment Corp Ltd
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2021-08-31
Anticipated expiration: 2039-12-13
Also published as: CN111041909A

Abstract

The invention relates to a construction method for inserting and paving a ballast turnout, which sequentially comprises the following steps: selecting a pre-laying position, building a turnout assembly platform (8), integrally pre-laying and assembling the turnout, laying and replacing the turnout in a skylight time point, and performing inspection maintenance after the turnout is opened, and performing hoisting operation and hoisting test construction of a portal frame type rail lifting bar device (17) after the integral pre-laying and assembling of the turnout is completed. According to the invention, by adopting the ballast feeding auxiliary vehicle and the ballast feeding main vehicle, the old stone ballast of the excavation ballast bed of the excavator is directly transferred to the material vehicle for storage through the ballast feeding auxiliary vehicle and the ballast feeding main vehicle, so that the technical problems that the old stone ballast is piled on site and occupies the site space, and the old stone ballast is carried secondarily are solved. The second material vehicle with the throwing belt capable of swinging up and down, swinging left and right and having a telescopic function is used for carrying out primary backfilling on the adjacent line of the upper bottom ballast, and secondary backfilling is carried out on the same line, so that the technical problems that the conventional turnout laying needs manual work and the excavator needs complex procedures and the construction efficiency is low are solved.

Description

Ballast turnout inserting and laying construction method

Technical Field

The invention relates to a railway track construction method, in particular to a ballast turnout inserting and laying construction method.

Background

At present, the method for inserting and paving No. 42 ballast turnouts in China mainly adopts the traditional manual method for inserting and paving. Before the blocking time, a turnout assembly platform is built near the turnout inserting and laying position to pre-lay turnout parts, and small mechanical equipment such as a track lifting machine, a sliding rail and a roller is adopted to insert and lay turnout parts in the blocking time. The technical scheme has the following technical defects: on one hand, the small mechanical equipment is required to be longitudinally moved for a long distance and transversely moved for multiple times due to the adoption of a pure manual construction mode, and meanwhile, the small pulley assemblies are required to be disassembled and assembled for multiple times in the longitudinal moving and transversely moving processes, and the equipment falling phenomenon sometimes occurs, so that the construction difficulty is increased, and the permanent deformation risk of the turnout track panel is easily caused by the laying mode; on the other hand, the construction scheme can cause the technical problems of more field personnel, long blocking time, large construction difficulty, low turnout inserting and laying efficiency, potential safety hazard and low laying precision. At present, the maximum specification of a ballast turnout used for a passenger special line is 42 turnouts, the total length of the turnout is 157.2 meters, and stricter construction technical requirements on turnout inserting and laying are required to be implemented in construction practice, so that the technical problems existing in the conventional large ballast turnout inserting and laying scheme are urgently to be solved. In view of the above, it is necessary to optimize and improve the existing large-size ballast turnout inserting and laying construction scheme, and the efficient and high-quality turnout inserting and laying construction is realized by adopting a more advanced large-size ballast turnout inserting and laying construction scheme and mechanical equipment, so as to meet the requirements of the development of the new era of the Chinese railway.

The invention discloses a construction method for inserting and laying a P60-1/42 large-number ballast high-speed turnout existing line, which comprises the steps of selecting an assembling position, erecting a turnout assembling platform, integrally assembling the turnout, transversely inserting and laying the turnout in a locking point, maintaining the turnout after opening, and the like. The method reduces the times of blocking construction, reduces the construction safety risk, saves material and labor consumption, and saves investment for turnout inserting and laying construction. However, the invention still adopts small-sized machines such as track jack, sliding plate flatbed and the like to carry out integral sliding and inserting paving on the whole set of turnout track panel pre-assembled in advance, and still adopts a purely manual construction mode to control the transverse displacement and longitudinal displacement of the turnout track panel in the sliding process, so that the technical defects that the construction precision cannot be ensured and the irreversible permanent deformation risk of the turnout track panel is easily caused still exist, especially the time and labor consumption in the aspect of processing the old turnout and stone ballast are realized, and a plurality of construction steps are all completed by purely manual work. Improvements are therefore needed.

The Chinese invention patent with the patent number ZL201710722978.2 discloses a whole set replacement construction process for turnouts in a closed point changed by an existing railway station, which comprises the following steps: firstly, construction preparation; a. b, construction lofting, b, assembling turnouts, c, arranging an installation pulley block and a lifter at the turnout assembly in the step b, d, reporting inspection acceptance, and secondly, performing turnout sliding construction in a closed point; e. sawing rails before and after turnouts, f, removing old track panels and turnouts, g, breaking the bottoms of track beds, h, connecting sliding rails, i, sliding the turnouts in a whole set, j, aligning the turnouts, k, loading ballast, lifting, l, tamping, refining, and the third step, checking and opening; and m, measuring the direction, the level and the track gauge of the turnout line. Although the invention has the advantages of convenient construction and low construction cost, the invention has the technical defects of easy turnout deformation in the turnout moving process, difficult guarantee of construction quality, large amount of manual matching and large stone ballast processing workload, thereby being not suitable for the replacement and pavement construction of large turnouts and still needing improvement.

The Chinese invention patent with the patent number ZL200710190459.2 discloses a turnout in-situ laying method for a ballast track passenger special line, which is characterized in that temporary track panels are firstly laid on the turnout in situ for transition, large-scale mechanical road maintenance equipment is adopted for tamping to stabilize a track bed, then the temporary track panels are dismantled, a turnout assembly platform is arranged on the turnout in situ, and the integral assembly and fine adjustment of the turnout are implemented on the turnout assembly platform; and then, integrally lifting the assembled turnout by using the group-lifting hydraulic equipment, removing the turnout assembly platform, then implementing ballast feeding tamping of the turnout, and maintaining the turnout regularly during use. The turnout assembling mode greatly improves the adjustment precision of the turnout, avoids the deformation of the turnout, enables the positioning of the turnout to be more accurate and keeps the integrity of the turnout. However, the invention is only suitable for the turnout replacement without the requirement of the skylight point and is not suitable for the turnout replacement of the existing line. Thus, improvements are still needed.

Disclosure of Invention

In order to solve the technical defects of the existing line inserting and laying construction method of the ballast high-speed turnout with the P60-1/42 large number, the whole set replacement construction process of the turnout in the existing railway station changed closing point and the turnout in-situ laying method of the special passenger line of the ballast track, the invention provides the ballast turnout inserting and laying construction method, which is used for solving the technical problems in the prior art and is suitable for the laying and replacing requirements of a newly-built line and the existing line turnout. The invention can realize the technical effects of improving the pre-laying quality of the turnout, along with high operation efficiency and low labor intensity.

The technical scheme of the ballast turnout inserting and paving construction method adopted by the invention is as follows:

a ballast turnout inserting and laying construction method sequentially comprises the following steps: selecting a pre-laying position, building a turnout assembly platform, integrally pre-laying and assembling the turnout, laying and replacing the turnout in a skylight time point, and performing inspection maintenance after the turnout is opened, and performing hoisting operation and hoisting test construction of a portal type rail lifting bar device after the turnout is integrally pre-laid and assembled.

Preferably, the hoisting operation and the hoisting test construction of the portal frame type track lifting panel device comprise the following steps:

a. the portal type track lifting panel device and the lifting track vehicle set are operated to a lifting place;

b. the gantry type track lifting panel device is used for carrying out lifting preparation, the hoisting rail car assembly is disassembled, and the supporting legs of the hoisting rail car support the car;

c. hoisting the portal type track lifting panel device to a pre-paved new turnout and aligning the portal type track lifting panel device;

d. the lifting rail car is retracted;

e. pre-laying a new turnout transverse moving test;

f. carrying out equipment inspection and anti-slip protection setting of the rail car;

g. and opening the line.

In any of the above schemes, preferably, the pre-laying position is selected by using a site meeting turnout assembly requirements as a traverse turnout assembly site.

In any of the above schemes, preferably, when the site meets the turnout integral assembly condition, an empty space is reserved on one side of the line as a cross-sliding turnout assembly site; when the spot does not meet the integral turnout assembly condition, an idle line track or a broken line is selected nearby as a cross-sliding turnout assembly site, or a movable turnout assembly platform is directly adopted.

In any of the above solutions, preferably, the constructing of the turnout assembly platform includes the following steps:

a. leveling and tamping the pre-paving position;

b. and placing the switch tie and the steel rail piece for turnout pre-paving and assembling.

In any of the above schemes, preferably, the leveling and tamping pre-paving position sequentially adopts an excavator to level the track bed, a ballast leveling machine to level the ballast, and a road roller to perform rolling treatment and meet the requirements of a turnout assembly site.

In any of the above schemes, preferably, the flatness of the turnout assembly site is measured by using a 3m ruler and is not more than 10 mm.

In any of the above schemes, preferably, the integral pre-laying and assembling of the turnout comprises the following steps:

a. integrally assembling turnouts on the erected turnout assembling platform;

b. primarily debugging the turnout after the integral turnout assembly is finished;

c. welding joints inside the turnout after the turnout is preliminarily debugged to be qualified;

d. and (5) inspecting and accepting the welded turnout.

In any of the above schemes, preferably, the switch changing in the skylight time point includes the following steps:

a. dismantling the turnout to be replaced;

b. the track walking platform and the portal type track lifting panel device cooperate to move the turnout to be replaced;

c. excavating old stone ballasts of the ballast bed and transferring the old stone ballasts to a first material vehicle through a ballast feeding auxiliary vehicle and a ballast feeding main vehicle;

d. ballasting the bottom of the second material vehicle on the adjacent line and leveling the track bed;

e. laying a switch tie;

f. moving the whole set of new turnout track panels from the turnout assembly platform field to a turnout position and paving;

g. preliminarily debugging the whole set of new turnout track panels and installing a large-resistance and non-porous clamping device;

h. ballasting, tamping and stabilizing the second material vehicle on the same line;

i. removing the large-resistance non-porous clamping device, and sequentially performing welding joint treatment, steel rail welding, polishing and flaw detection after welding, mounting conversion equipment, connecting electrical equipment, mounting jumper wires and power and electricity joint debugging;

j. and after the electric service debugging and the parking protection removal, the circuit is switched on.

In any of the above schemes, preferably, the patrol maintenance after turnout opening is performed for 24 hours after turnout opening, and the speed is slowly increased to the design speed per hour.

In any of the above schemes, preferably, thermite welding or small-sized gas pressure welding is adopted to weld the rails in the turnout zone, and the welding sequence is to weld six joints of the straight stock rail and the curved stock rail first and then weld eight joints of the inner strand rail.

In any of the above solutions, it is preferable that the welding should be performed by the same welding rail group for the same strand of steel rail.

In any of the above solutions it is preferred that the joint is subsequently preliminarily checked for flatness after welding and that tempering corrections are made when said flatness is not satisfactory.

In any of the above solutions, it is preferable that the joint that is still unqualified in tempering correction is re-welded after being sawed off, and the rail is primarily ground after the welding is completed.

In any of the above schemes, preferably, the second skip is provided with a throwing belt capable of swinging and stretching.

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

1. by adopting the auxiliary ballast feeding vehicle and the main ballast feeding vehicle, the old stone ballast of the excavation track bed of the excavator is directly transferred to the material vehicle through the ballast feeding vehicle for storage, so that the technical problems that the old stone ballast is piled on site and occupies the site space, and the old stone ballast is carried secondarily are solved.

2. The second material vehicle with the throwing belt capable of swinging up and down, swinging left and right and having a telescopic function is used for carrying out adjacent line top ballast, and backfilling on the same line, so that the technical problems that manual work and excavator matching are needed for laying and replacing existing turnouts, and the construction efficiency is low are solved.

3. The inserting and laying of the turnout is fully performed by adopting a portal type rail lifting bar device and a crawler traveling platform, or by adopting a line crane, compared with the existing inserting and laying of the turnout, the turnout inserting and laying device has the technical advantages that temporary rails do not need to be laid, and meanwhile, the operation efficiency and the construction quality are both obviously improved.

Drawings

Fig. 1 is a schematic diagram of a pre-paving construction process of a preferred embodiment of the ballast turnout plug-laying construction method.

Fig. 2 is a schematic diagram of the spot layout before the pre-laying of the turnout in the preferred embodiment of the ballast turnout plug-laying construction method.

Fig. 3 is a schematic view of the turnout pre-laying completion site arrangement of a preferred embodiment of the ballast turnout plug-laying construction method.

Fig. 4 is a schematic diagram of an inner welding point of a turnout track panel turnout in a preferred embodiment of the ballast turnout inserting and laying construction method.

Fig. 5 is a schematic diagram of the switch inserting and laying site arrangement of a preferred embodiment of the ballast switch inserting and laying construction method of the invention.

Fig. 6 is a schematic diagram of a connecting welding point of a turnout track panel on a main track according to a preferred embodiment of the ballast turnout inserting and laying construction method.

Fig. 7 is a schematic structural view of the track walking platform in the embodiment shown in fig. 5 of the ballast turnout inserting and paving construction method of the invention.

Fig. 8 is a schematic structural diagram of the portal type rail lifting panel device in the embodiment shown in fig. 5 of the ballast turnout plug-in laying construction method of the invention.

Fig. 9 is a schematic diagram of arrangement of a turnout inserting and laying site adopting a line crane for hoisting of the turnout inserting and laying construction method according to the preferred embodiment of the invention.

Fig. 10 is a schematic diagram of a line crane hoisting turnout track panel according to a preferred embodiment of the ballast turnout inserting and laying construction method.

Description of reference numerals:

1, a crane of an automobile; 2, turnout parts; 3, a road transport vehicle; 4 a first positive line; 5 a second positive line; 6, switching turnouts to be replaced; 7, a protective railing; 8, assembling a platform for the turnout; 9, the whole set of new turnout track panels; 10 a first material vehicle; 11, a road roller; 12 a second skip; 13 a land leveler; 14, loading a ballast auxiliary vehicle; 15, loading the ballast main vehicle; 16, digging a machine; 17 a door frame type track lifting panel device; 18 track running platforms; 19-line crane; 20 a rail-powered vehicle; 21 turnout transport vehicle.

Detailed Description

The following describes in detail a preferred technical scheme of the ballast turnout inserting and laying construction method with reference to fig. 1 to 10:

as shown in fig. 1, a ballast turnout inserting and laying construction method includes the following steps:

the first step is as follows: selecting a pre-paving position; when a ballast turnout is in early stage site selection, an empty ground is planned and reserved on one side of a line to serve as a transverse turnout assembly site, and the transverse turnout assembly site needs to meet the integral assembly requirement of the turnout; for sites which do not meet the integral turnout assembly conditions, selecting an idle line track or a broken line near a turnout area to be inserted and paved as an assembly site according to actual conditions, or directly adopting a movable turnout assembly platform;

the movable turnout assembling platform preferably adopts a patent number ZL201910561849.9, and the subject is a technical scheme for the movable turnout assembling platform of the ballast circuit.

The second step is that: constructing a turnout assembly platform 8 in a turnout assembly site; the assembly site adopts a leveling and tamping planning reserved turnout assembly site, a road bed, a ballast leveling machine and a land leveler 13 are leveled by an excavator 16, after the rolling treatment of a road roller 11 reaches the requirements of the turnout assembly site, a turnout sleeper and a steel rail are directly placed on the turnout assembly site for turnout pre-paving assembly, or an adjacent line track is selected, or the movable turnout assembly platform is directly adopted, and the requirement of the turnout assembly platform 8 on the flatness is checked by a 3m ruler and is not more than 10 mm;

the third step: pre-laying and assembling the turnout integrally; integrally assembling turnouts on the erected turnout assembling platform 8, carrying out turnout preliminary debugging after the turnout is integrally assembled, welding joints inside the turnout after the turnout is preliminarily debugged to be qualified, and finally inspecting and accepting the welded turnout;

the fourth step: hoisting operation and hoisting test construction are carried out on the portal frame type track lifting panel device 17; the method comprises the following steps: a. blocking the line, setting protection, putting personnel in place and powering off a contact network; b. the flat car runs the portal frame type track lifting panel device 17 to a hoisting place, and simultaneously the hoisting track car set runs to the hoisting place; c. the portal frame type rail lifting panel device 17 is used for carrying out hoisting preparation, the rail car is disassembled, and the support legs of the rail car are hoisted; d. hoisting the portal frame type track lifting panel device 17 to a pre-paved new turnout and aligning the portal frame type track lifting panel device 17; e. the lifting rail car is retracted; f. pre-laying a new turnout transverse moving test; g. personnel and machines return to a fork area, and the rail cars and the flat cars return to the station, equipment is checked, and anti-slip protection setting of the rail cars is carried out; h. evacuating people and opening a line;

the fifth step: the turnout is paved and changed in the skylight time point; a. transact the locking procedure and cut off the power of the contact network; b. manually removing the connection of the two ends of the turnout 6 to be replaced and sawing the rails; c. the track walking platform 18 and the portal type track lifting panel device 17 cooperate to remove the turnout 6 to be replaced; d. the excavator 16 excavates the old ballast of the track bed and transfers the old ballast to the first material trolley 10 through the ballast feeding auxiliary vehicle 14 and the ballast feeding main vehicle 15; e. the method comprises the following steps that (1) bottom ballasts are loaded on an adjacent second material vehicle 12, an excavator 16 levels a track bed, namely ballast leveling, a grader 13 levels the ballasts, and a road roller 11 performs rolling processing; f. laying the rest switch sleepers; g. the whole set of new turnout track panels 9 are moved into the turnout position from the turnout assembly platform 8 site and laid; h. initially debugging the whole set of new turnout track panel 9, and installing a large-resistance imperforate clamping device; i. ballasting on the second material trolley 12 on the same line; j, tamping and stabilizing; k. dismantling the large-resistance non-porous clamping device, processing a welding joint, welding a steel rail, polishing and detecting flaws after welding, installing conversion equipment, connecting electrical equipment, installing a jumper and adjusting the work and electricity; l, debugging the electric service, removing parking protection and opening a circuit;

and a sixth step: after the turnout is opened, performing maintenance patrol; and (5) carrying out 24h maintenance after the turnout is opened, and slowly accelerating to the designed speed per hour.

And the existing line where the turnout is located is removed from the blocked line, the rail is sawed according to the measured turnout and a margin of 100mm is reserved, and the rail is accurately matched when the turnout is welded.

Before the steel rail is welded, the lengths of the switch rail, the stock rail, the frog and all other steel rail parts are rechecked, namely, 30mm of upsetting amount is reserved for each joint of the steel rail, so that the lengths of the steel rail parts are ensured to meet the requirements of a laying diagram.

Adopt thermite welding or small-size gas pressure welding switch district's interior rail, the welding order is for welding the joint of the straight stock rail of switch and curved stock rail earlier, welds the joint of interior thigh rail again, and the joint of the straight stock rail of switch and curved stock rail is six in this embodiment, and the joint of interior thigh rail is eight. When welding, the same strand of steel rail is finished by the same welding rail group, so that the upsetting amount of each joint is approximately the same. The flatness of the joint should be preliminarily checked immediately after welding, and if the flatness is not satisfactory, tempering correction should be performed. And sawing off the unqualified steel rail after tempering correction, then re-welding, and performing primary grinding on the steel rail after welding is completed.

Supplementing railway ballasts after the insertion and the laying of the turnout are finished, and manually lifting the railway and tamping to the designed elevation +/-2 mm; and (3) loosening a turnout steel rail fastener to enable the steel rail to be in a free state, simultaneously replacing elastic rubber base plates within 36 m ranges around the turnout, and welding the turnout and the interval rail and locking the turnout when the rail temperature reaches the designed locking rail temperature of 33 ℃.

After the turnout and the interval are welded and the turnout is stabilized, polishing all welding joints to meet the requirement of temporary laying technical conditions, and simultaneously carrying out flaw detection on the joints; the turnout tamping vehicle and the stabilizing vehicle are adopted to carry out three tamping and three stabilizing on each group of turnout, each tamping is carried out by checking the elevation and the direction of the turnout position by using a level gauge and a theodolite, the basis is provided for the operation of a large machine, and meanwhile, the large machine is matched for manual track lifting and track shifting and thinning.

And installing and debugging conversion equipment, an external lock and a seal check equipment, and adjusting the seal of the switch rail and the stock rail and the seal of the point rail and the wing rail.

The whole group of turnouts including electric appliances are finely adjusted according to the requirements of the laying temporary technical conditions.

And the turnout parts 2 are transported to a turnout assembly site by adopting a railway flat car and are hoisted by adopting a track crane.

The second skip 12 is provided with a throwing belt capable of swinging up and down and left and right and having a telescopic function.

As shown in fig. 2 to 8, a specific preferred embodiment of the present invention is described as follows:

as shown in fig. 2-4, the construction organization plan before and after the turnout pre-laying of the invention is arranged, the main construction content is that the turnout parts 2 are transported to the turnout inserting and laying site, and the turnout parts 2 are assembled and connected to form the whole group of turnout track row on the assembling site beside the turnout to be inserted and laid. The turnout parts 2 are transported to a turnout inserting and laying site through the road transport vehicle 3, parts such as steel rail parts, packing boxes and the like in the turnout parts 2 are firstly hoisted to the open space between the turnout assembly platform 8 and the turnout 6 to be replaced by the automobile crane 1, and the normal passing of the second main line 5 cannot be influenced by the placement of the steel rail parts. Then the switch sleepers in the switch parts 2 are sequentially placed on a switch assembly platform 8 which is processed by engineering machinery in advance according to switch sleeper numbers and switch sleeper intervals on a switch plane layout. After the switch tie is placed, the base plate and the fasteners in the packing box are sequentially placed at corresponding positions of the switch tie, and the steel rail piece which is hung previously is hoisted and placed on the switch tie according to the requirements of switch assembly through the automobile crane 1. The field operation personnel complete the assembly of the turnout with the assistance of the turnout assembly machine. After the turnout is assembled, the thermite welding mode or other welding modes are adopted to complete the welding of 14 joints in the turnout, as shown in fig. 4, the welding sequence is preferably as follows: 2. 12, 11, 5, 1, 13, 3, 14, 6, 4, 10, 9, 8, 7. Or other welding sequences are adopted according to actual construction requirements. Thus, the assembly of the whole set of turnout track panels 9 of the turnout is completed. The pre-paving construction process is shown in figure 1.

As shown in fig. 5, the invention is a railroad switch insertion construction organization plane layout diagram. The main construction content mainly comprises two parts: firstly, inserting equipment for paving a lifting operation and a lifting test construction in a skylight time of a turnout; secondly, the whole set of pre-paved turnouts are subjected to inserting paving construction in the skylight time.

The turnout hoisting operation and hoisting test construction through the portal frame type rail lifting panel device 17 in the skylight time comprises the following steps:

a. lines are blocked, protection is set, personnel are in place, and the contact network is powered off; b. the flat car runs the portal frame type track lifting panel device to a hoisting place, and simultaneously the hoisting track car set runs to the hoisting place; c. the portal frame type track lifting panel device 17 is used for preparing hoisting, the rail car is disassembled, and the support legs of the rail car are hoisted; d. hoisting the portal frame type track lifting panel device 17 to a pre-paved new turnout and aligning the portal frame type track lifting panel device; e. the lifting rail car is retracted; f. pre-laying a new turnout transverse moving test; g. personnel and machines return to a fork area, and the rail cars and the flat cars return to the station, equipment inspection and rail car anti-slip protection are set; h. and (5) evacuating the personnel and opening the line.

The inserting and laying construction of the whole group of pre-laid turnouts in the skylight time comprises the following steps:

a. transact the locking procedure and cut off the power of the contact network; b. manually removing the connection of the two ends of the turnout 6 to be replaced and sawing the rails; c. the track walking platform 18 and the portal type track lifting panel device 17 cooperate to remove the turnout 6 to be replaced; d. the excavator 16 excavates the old stone ballast of the track bed and transfers the old stone ballast to the first material trolley 10 through the ballast feeding auxiliary vehicle 14 and the ballast feeding main vehicle 15; e. the method comprises the following steps that (1) bottom ballasts are loaded on an adjacent second material vehicle 12, an excavator 16 levels a track bed (ballast leveling), a grader 13 levels the ballasts, and a road roller 11 rolls; f. laying the rest switch sleepers; g. the whole set of new turnout track panels 9 are moved into the turnout position from the turnout assembly platform 8 site and laid; h. the whole set of new turnout track panel 9 is initially adjusted, and a large-resistance imperforate clamping device is installed; i, ballasting on a second material vehicle 12 on the same line; j, tamping and stabilizing; removing the large-resistance non-porous clamping device, processing a welding joint, welding a steel rail, polishing and detecting flaws after welding, installing conversion equipment, connecting electrical equipment, installing a jumper and performing combined debugging of power and electricity; l debugging the electric service, removing the parking protection and opening the line.

As shown in fig. 6, there are six joints for the entire new set of switch rows 9 of fig. 5 welded to the first plus line 4 and the second plus line 5.

As shown in fig. 7 and 8, the schematic diagram of the switch device is shown, and the specific structure and the working principle thereof can be seen in a device and a working method for railway switch laying with patent number ZL 201921149558.0.

As shown in fig. 9, as an optimized scheme, the invention adopts a line crane 19 and a turnout transport vehicle 21 to replace the gantry type track bar device 17 and the track running platform 18 in the turnout plug laying equipment in the scheme 5. The two schemes of the old stone ballast and the new stone ballast backfilling are basically the same, and the difference is that: 1) the turnout 6 to be replaced is manually decomposed into a plurality of sections instead of only dismantling the connection between the turnout and a main line, the turnout 6 to be replaced is hoisted to the turnout transport vehicle 21 in a segmented manner by the line crane 19, and the turnout 6 to be replaced is transported to a railway maintenance stock yard for disassembly by the turnout transport vehicle 21. 2) The whole set of new turnout track panels 9 are transversely moved to a turnout area by adopting a line crane 19 to perform cross-line lifting and falling, and one or two line cranes 19 are selected according to the weight of the whole set of new turnout track panels 9 and the lifting load capacity of the line cranes.

As shown in fig. 10, a schematic diagram of a line crane 19 for lifting a switch rail row is shown, which implements lifting and transporting of the switch rail row by a spreader similar to a shoulder pole.

According to the invention, by adopting the ballast feeding auxiliary vehicle and the ballast feeding main vehicle, the old stone ballast of the excavation track bed of the excavator is directly transferred to the material vehicle for storage through the ballast feeding vehicle, so that the technical problems of material piling and site space occupation of the old stone ballast on site and secondary carrying of the old stone ballast are solved. According to the invention, the second material vehicle with the throwing belt capable of swinging up and down, left and right and having a telescopic function is adopted to carry out adjacent line upper bottom ballast, and the same line is backfilled, so that the technical problems that the existing turnout pavement needs complicated manual work and the excavator needs to be matched, and the construction efficiency is low are solved. Compared with the existing switch insertion laying equipment, the switch insertion laying equipment provided by the invention has the technical advantages that temporary rails do not need to be laid, and meanwhile, the operation efficiency and the construction quality are obviously improved.

The above embodiments are merely preferred embodiments, wherein the components and the connection relations involved are not limited to the above described embodiments, and the arrangement and the connection relations of the components in the preferred embodiments may be arbitrarily arranged and combined to form a complete technical solution.

Claims

1. A ballast turnout inserting and laying construction method sequentially comprises the following steps: selecting a pre-laying position, building a turnout assembly platform (8), integrally pre-laying and assembling the turnout, laying and replacing the turnout in a skylight time point, and performing inspection maintenance after the turnout is opened, wherein the method is characterized in that after the integral pre-laying and assembling of the turnout is completed, hoisting operation and hoisting test construction of a portal type rail lifting panel device (17) are performed;

the turnout laying and changing in the skylight time point comprises the following steps:

a. dismantling turnouts (6) to be replaced;

b. the track walking platform (18) and the portal type track lifting panel device (17) cooperate to move the turnout (6) to be replaced;

c. excavating old stone ballasts of the ballast bed and transferring the old stone ballasts to a first material vehicle (10) through a ballast loading auxiliary vehicle (14) and a ballast loading main vehicle (15);

d. bottom ballasts are loaded on the adjacent second material trucks (12) and the ballast beds are leveled;

e. laying a switch tie;

f. the whole set of new turnout track panels (9) is moved into a turnout position from the turnout assembly platform (8) site and laid;

g. preliminarily debugging the whole set of new turnout track panel (9) and installing a large-resistance non-porous clamping device;

h. ballasting, tamping and stabilizing are carried out on the second material trolley (12) on the same line;

2. The ballast turnout plug-in laying construction method according to claim 1, wherein the portal type rail lifting panel device (17) hoisting operation and hoisting test construction comprises the following steps:

a. the portal type track lifting panel device (17) and the hoisting track vehicle set are operated to a hoisting place;

b. preparing a hoisting operation by a portal frame type track lifting panel device (17), disassembling the hoisting rail car set, and supporting legs of the hoisting rail car;

c. hoisting the portal type track lifting panel device (17) to a pre-paved new turnout and aligning the portal type track lifting panel device (17);

d. the lifting rail car is retracted;

e. pre-laying a new turnout transverse moving test;

g. and opening the line.

3. The ballast turnout plug-laying construction method according to claim 1, wherein the pre-laying position is selected by using a site meeting turnout assembly requirements as a cross-sliding turnout assembly site.

4. The ballast turnout plug-laying construction method according to claim 3, wherein when the site meets the turnout overall assembly condition, an empty space is reserved on one side of the line as a cross-sliding turnout assembly site; when the spot does not meet the integral turnout assembly condition, an idle line track or a broken line is selected nearby as a cross-sliding turnout assembly site, or a movable turnout assembly platform is directly adopted.

5. The ballast turnout plug-laying construction method according to claim 1, wherein the construction of the turnout assembly platform (8) comprises the following steps:

a. leveling and tamping the pre-paving position;

6. The ballast turnout plug-laying construction method according to claim 5, wherein the leveling and tamping pre-laying position adopts an excavator (16) to level the track bed, a ballast leveling machine (13) to level the ballast, and a road roller (11) to perform rolling treatment and meet the turnout assembly site requirement in sequence.

7. The ballast turnout plug-laying construction method according to claim 6, wherein the flatness of the turnout assembly site is measured by a 3m ruler to be not more than 10 mm.

8. The ballast turnout plug-laying construction method according to claim 1, wherein the integral pre-laying and splicing of the turnout comprises the following steps:

a. integrally assembling turnouts on the erected turnout assembling platform (8);

d. and (5) inspecting and accepting the welded turnout.

9. The ballast turnout plug-laying construction method according to claim 1, wherein after turnout opening, the maintenance is performed for 24 hours after turnout opening, and the speed is slowly increased to the design speed per hour.

10. The ballast turnout plug-laying construction method according to claim 1, wherein thermite welding or small-sized gas pressure welding is adopted to weld the rails in the turnout zone, and the welding sequence is to weld six joints of a straight stock rail and a curved stock rail first and then weld eight joints of an inner strand rail.

11. The ballast switch inserting and laying construction method according to claim 10, wherein the same steel rail is welded by the same welding rail group.

12. The ballast switch laying construction method according to claim 10, wherein the flatness of the joint is preliminarily checked immediately after welding, and when the flatness is not satisfactory, tempering correction is performed.

13. The ballast switch inserting and laying construction method according to claim 12, wherein the joint which is still unqualified in tempering correction is sawed off and then is welded again, and the steel rail is primarily ground after welding.

14. The ballast switch berthing construction method according to claim 1, wherein the second material truck (12) is provided with a sling which can swing and stretch.