CN116892139A - Seamless line laying method adopting middle locking two-end stretching - Google Patents
Seamless line laying method adopting middle locking two-end stretching Download PDFInfo
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- CN116892139A CN116892139A CN202311062259.4A CN202311062259A CN116892139A CN 116892139 A CN116892139 A CN 116892139A CN 202311062259 A CN202311062259 A CN 202311062259A CN 116892139 A CN116892139 A CN 116892139A
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 176
- 239000010959 steel Substances 0.000 claims abstract description 176
- 238000010276 construction Methods 0.000 claims abstract description 41
- 238000003466 welding Methods 0.000 claims abstract description 39
- 241001669679 Eleotris Species 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 4
- 238000013459 approach Methods 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 241001530613 Horminum pyrenaicum Species 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000009430 construction management Methods 0.000 description 1
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- 239000010705 motor oil Substances 0.000 description 1
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- 238000005096 rolling process Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B29/00—Laying, rebuilding, or taking-up tracks; Tools or machines therefor
- E01B29/16—Transporting, laying, removing, or replacing rails; Moving rails placed on sleepers in the track
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2/00—General structure of permanent way
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B29/00—Laying, rebuilding, or taking-up tracks; Tools or machines therefor
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B29/00—Laying, rebuilding, or taking-up tracks; Tools or machines therefor
- E01B29/16—Transporting, laying, removing, or replacing rails; Moving rails placed on sleepers in the track
- E01B29/17—Lengths of rails assembled into strings, e.g. welded together
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- Machines For Laying And Maintaining Railways (AREA)
Abstract
The invention belongs to the technical field of seamless track laying, and discloses a seamless track laying method adopting middle locking and two-end stretching, which aims to solve the technical problem that a construction skylight can be wasted in the construction process of stretching and locking a dragon tail after welding and locking a dragon mouth part in the prior art when a seamless track is laid; according to the method, the length of a unit rail section of a steel rail is calculated according to the upsetting amount and the reserved rail gap, the steel rail is locked according to the length of the unit rail section, and the reserved rail gap is stretched and folded at a tap by using a welding machine; then, stretching and welding the steel wire rope to the direction of the tap by taking the upsetting amount as the stretching amount; and stretching the rail at the tail part in the direction of the rail, and connecting the rail with the existing steel rail through a clamping plate after stretching. In the seamless line laying method provided by the invention, the length of the stretching amount is determined firstly, then the locking position is determined to lock the steel rail, and after the middle position of the steel rail is locked, the stretching in the directions of the dragon mouth and the dragon tail can be performed, so that the construction efficiency can be improved to a great extent, and the construction skylight is saved.
Description
Technical Field
The invention relates to the technical field of seamless track laying, in particular to a seamless track laying method adopting middle locking and two-end stretching.
Background
The seamless track change laying is an important technology for changing the track in the current railway track, and the seamless track is a novel track structure which can be suitable for heavy-load trains and high-speed railways. A large amount of research data show that compared with the common suture line, the seamless line can save 35% -75% of maintenance cost in terms of saving labor force and prolonging service life of equipment, so that development of the paving technology of the seamless line is particularly important at present. The railway seamless line laying is a complex system engineering, the construction management of each link is enhanced strictly according to construction operation standards, scientific and reasonable construction technology is actively adopted, the seamless line structure is optimized, the railway seamless line laying and maintenance quality is continuously improved, the important advantages of the railway seamless line are fully exerted, and the economic benefit and the social benefit of the railway engineering are improved. Whether or not the seamless track is laid is stable depends on the temperature stress and resistance to which the inside of the rail is subjected, including the longitudinal resistance of the ballast bed, the transverse resistance, the joint resistance, the fastener resistance, the track frame rigidity, and the like. When the temperature stress of the steel rail is less than or equal to the resistance, the circuit is in a stable state; on the contrary, when the temperature stress of the steel rail is larger than the resistance, the stability of the line is difficult to maintain, and the rail expansion runway is easy to occur. Therefore, the correct and reasonable setting of the locking rail temperature plays a crucial role in the stability of the seamless line on the premise of ensuring the stability of the seamless line.
In the prior art, in the construction of seamless track rail replacement, a new steel rail is paved into a rail bearing groove by using a rail replacement vehicle to move, then the stretching amount of the unit rail section steel rail is calculated according to the length of the unit rail section steel rail, the rail at the position of a tap hole is locked after the stretching amount is determined, and the rail is stretched from a tap tail; the rail changing speed is high, the efficiency is high, the rail is just welded and locked after the rail changing vehicle is used to travel to the position of the rail tail and the new rail falls into the rail bearing groove, the rail tail only waits for the upsetting welding of the rail car for the pneumatic welding of the rail mouth to finish, and the rail can be welded in a stretching way after 50 meters of lines are locked from the rail mouth, so that the time waiting for the welding work of the rail mouth and the locking work of the rail mouth is increased in the construction process, and the construction skylight is greatly wasted; in addition, in the stretching process, because the stretching amount is large or the unit rail section is too long, the on-site stretching machine cannot stretch in place at one time, the stretching engine oil cylinder must be pushed out again in the middle, the construction task amount is increased, the construction time is delayed, time and labor are wasted, and the construction progress cannot be reduced by effectively utilizing the skylight time.
Disclosure of Invention
According to the method, after a new steel rail is paved on a rail changing vehicle, the lengths of unit rail sections of the steel rail are calculated according to the upsetting amount and the reserved rail gaps, the steel rail is locked according to the lengths of the unit rail sections, and then the steel rail is respectively stretched towards the direction of a tap hole and the direction of a tap tail from the locking position, so that the technical problems that when the seamless line is paved in the prior art, a construction skylight is wasted in the construction process of stretching and locking the tap tail after the welding of the tap hole is completed and the locking is performed, and the construction progress is reduced are solved.
In order to achieve the aim of the invention, the invention adopts the following technical scheme:
a seamless line laying method adopting middle locking two-end stretching comprises the following steps:
s1: setting signal protection; issuing a construction blocking command to start operation;
s2: overlapping a return line at the start point and the end point of the track change section;
s3: cutting the existing steel rail; disassembling sleeper fasteners of existing steel rails of the rail changing section;
s4: the rail changing vehicle runs for rail changing, and the temperature when the steel rail enters the rail bearing groove and the temperature after the steel rail falls into the rail bearing groove are collected and recorded;
s5: after the rail at the tap hole falls into the rail bearing groove, calculating the stretching amount of the rail according to the upsetting amount of the welding machine and the reserved rail gap at the tap hole;
s6: obtaining the distance between the tap hole and the locking position according to the temperature of the steel rail entering the rail bearing groove, the temperature of the steel rail falling into the rail bearing groove and the length of the rail section of the stretching amount calculating unit;
s7: locking the position of the steel rail; locking the rail from the length of a unit rail section away from the tap to the tap tail direction;
s8: stretching and folding the reserved rail joints at the positions of the closure openings; then the upsetting amount is used as a stretching amount to stretch the steel rail from the tap hole to the locking position section towards the tap hole, the steel rail is welded with the paved steel rail after stretching, and finally the steel rail from the tap hole to the locking position section is locked;
s9: stretching the steel rail to the direction of the dragon tail at the dragon tail, and connecting the stretched steel rail with the existing steel rail; finally, the rail from the locking position to the dragon tail section is locked.
In the scheme, a rail changing vehicle runs to change rails, the stretching amount of rail stretching is determined according to the upsetting amount and the reserved rail gap, the stretching amount is used for calculating the length L of a unit rail section rail, the length L of the unit rail section rail is the distance from a tap hole to a locking position, the locking position is determined according to the distance, the rail is locked, the tap hole position stretches the rail towards the tap hole by a welding machine after the position is locked, the reserved gap is closed, and the upsetting amount is used as the stretching amount for welding the rail after the stretching and closing; the rail replacing machine runs to a rail tail position, and after a steel rail at the rail tail falls into a rail bearing groove, the steel rail is stretched towards the rail tail direction by a stretcher; the length of the stretching amount is determined in the seamless line laying method, then the steel rail is locked from the middle position, the steel rail is stretched from the middle to the two ends of the dragon tail of the dragon mouth, the stretching in the directions of the dragon mouth and the dragon tail can be simultaneously carried out after the middle position of the steel rail is locked, the construction efficiency can be greatly improved, and the construction skylight is saved.
Further, in S2, a return line is built according to a standard of operation of two longitudinal and one transverse, and the installation section of the return line is not less than 70mm 2 。
In the scheme, two return lines are arranged along the track direction according to the operation standard of two longitudinal and one transverse, one return line is arranged between two steel rails perpendicular to the track direction, and the installation section of the return line is not less than 70mm 2 Ensuring the smooth current loop. And after the rail-changing vehicle runs through the dragon mouth and the dragon tail section, the return line is switched in time, so that the uninterrupted return is ensured, and the electrical equipment is prevented from being burnt.
Further, S3 includes the following steps:
s301: cutting the existing steel rail, cutting a cutting opening every 300-500 m, and if the rail seam at the cutting opening is greater than 50mm, adding a short rail head under the cutting opening;
s302: the cutting openings of the existing steel rails are connected by clamping plates;
s303: and disassembling sleeper fasteners of the rail change section, wherein at least one fastener is reserved for every forty sleepers during disassembly.
In the scheme, the existing steel rail is required to be cut before rail replacement, but the cut steel rail also bears rail replacement running, so that the cutting positions are required to be connected by using clamping plates, and part of fasteners are required to be reserved when fasteners are detached, so that the stability of the existing steel rail is ensured, and the safe running of the rail replacement is ensured; in order to ensure that the rail transfer car stably runs, a cutting opening is cut every 300-500 meters, and in an actual construction road section, the cutting distance of the bent road section can be properly shortened.
Further, S4 includes the following steps:
s401: the rail changing vehicle moves to a rail changing starting point, and a new rail and an old rail are clamped and hung on rail hanging tongs of the rail changing vehicle;
s402: recording the temperature of the steel rail when entering the rail bearing groove;
s403: running a rail exchange vehicle to exchange the steel rail into the rail bearing groove, and detaching the reserved fastener when the rail exchange vehicle approaches the reserved fastener;
s404: the temperature of the steel rail after falling into the rail bearing groove is recorded.
In the scheme, when the length of the unit rail section steel rail is calculated, the steel rail degree during operation is needed, in the scheme, the average value of the temperature when the steel rail enters the rail bearing groove and the temperature after the steel rail falls into the rail bearing groove is used as the temperature of the steel rail during operation, and the calculated length of the unit rail section steel rail is more accurate; the part of the fasteners are detached when the rail changing vehicle runs to the reserved fasteners, so that the running safety of the rail changing vehicle is ensured.
Further, in S5, according to the upsetting amount of the welding machine and the reserved rail gap at the tap, calculating the stretching amount of the steel rail:
stretching Δl=upsetting amount+reserved rail gap
Where Δl represents the amount of rail stretch.
Further, in S6, the length of the unit rail section is calculated according to the temperature when the steel rail enters the rail bearing groove, the temperature after the steel rail falls into the rail bearing groove and the tensile amount:
wherein Deltal represents the stretching amount of the steel rail and DeltaT Into (I) Indicating the temperature, deltaT, of the rail when it enters the rail-carrying groove Falling down Indicating the temperature of the steel rail falling into the rail bearing groove, T e And the locking rail temperature is represented, and L is the length of the unit rail section rail, namely the distance from the tap hole to the locking position.
Further, S7 includes the following steps:
s701: determining a position which is one unit rail section rail length from the portal as a starting locking position;
s702: the fastener is used for locking 40-50 meters towards the tail direction from the starting locking position.
In the scheme, the length position of a unit rail section rail is determined as a starting locking position, and the locking position is locked for 40-50 meters, so that the rail is firmly locked.
Further, S8 includes the following steps:
s801: supporting rollers below the steel rail, wherein the rollers support one pad every 10 meters;
s802: stretching and folding the reserved rail joints at the positions of the open ends by using a welding machine;
s803: after folding, using a welding machine to stretch the steel rail from the tap hole to the locking position section towards the tap hole by taking the upsetting amount as the stretching amount;
s804: welding the stretched steel rail with the paved steel rail;
s805: fasteners are used to lock the rail from the portal to the locked position section.
In this scheme, stretch the rail behind the rail below pad cylinder, the cylinder is as fulcrum support rail, makes the sliding friction between rail bottom surface and the backing plate become the rolling friction between rail bottom surface and the cylinder to reduce the resistance of diffusing, alleviate the load of stretcher.
Further, the upset amount in S804 is the average upset amount of the welder.
Further, S9 includes the following steps:
s901: supporting rollers below the steel rail, wherein the rollers support one pad every 10 meters;
s902: the rail is collided at the tail of the rail so as to release the internal stress of the rail; then using a stretcher to stretch the steel rail towards the tail direction;
s903: after stretching, connecting the steel rail with the existing steel rail through a joint clamping plate;
s904: and (3) adjusting the position of a large rubber cushion below the steel rail, locking the steel rail from the locking position to the dragon tail section through a fastener, and screwing a nut of the fastener by using an internal combustion bolt spanner during locking.
In the scheme, the rail is collided to release the stress in the rail, so that the stress in the rail can be conveniently unfolded and laid when the rail is stretched; the steel rail is locked after being stretched and connected with the existing steel rail, so that the steel rail is ensured to be kept in a stretched state when being locked.
The beneficial effects of the invention are as follows:
according to the seamless line laying method provided by the invention, the stretching amount of the stretching of the steel rail is determined according to the average upsetting amount of the welding machine and the reserved rail gap of the steel rail, the length of the unit rail section steel rail is calculated according to the stretching amount, the steel rail is locked according to the length of the unit rail section steel rail, and the steel rail can be stretched to two ends from the positions of a tap hole and a tap tail after locking; different from the prior art that the length of the unit rail section steel rail is firstly determined, then the stretching amount of the steel rail is calculated according to the determined length of the unit rail section steel rail, the rail with the length of one unit rail section steel rail is stretched at the tail of the dragon according to the calculated stretching amount, when the tail of the dragon is stretched, the welding of the dragon mouth is required to be completed, and the rail is locked for 50 meters from the dragon mouth and can be stretched, so that the time for waiting for welding and locking of the dragon mouth is wasted in the middle; therefore, in the scheme, after the middle position of the steel rail is locked, the construction stretching towards the direction of the tap and the direction of the tap tail can be simultaneously carried out, the time for waiting for the welding and locking of the tap position is not wasted, the construction efficiency can be greatly improved, and the construction skylight is saved.
In the seamless line laying method provided by the invention, the stretching amount of the stretching of the steel rail is determined first, and the length of the unit rail section steel rail is calculated according to the stretching amount, so that the rail can be stretched in place at one time when the tap or the tap tail is stretched, and the construction efficiency is high.
Drawings
FIG. 1 is a construction flow chart of a seamless track laying method using middle locking two-end stretching;
fig. 2 is a schematic diagram of a work vehicle consist structure in seamless track laying.
Detailed Description
The invention will be further described with reference to the drawings and specific examples. The following description of the embodiments of the present invention is provided to facilitate understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and all the inventions which make use of the inventive concept are protected by the spirit and scope of the present invention as defined and defined in the appended claims to those skilled in the art.
Example 1
The embodiment provides a seamless line laying method adopting middle locking two-end stretching, wherein the construction process is as shown in figure 1, after a new steel rail is laid on a rail changing vehicle, the length of a unit rail section steel rail of the steel rail is calculated according to the upsetting amount and a reserved rail gap, the steel rail is locked according to the length of the unit rail section, and then stretching is carried out in the directions of a tap hole and a tap tail respectively from a locking position, so that the technical problems that when the seamless line in the prior art is laid, a construction skylight is wasted in the construction process of stretching and locking the tap tail after the welding of the tap hole is completed and the locking is carried out, and the construction progress is reduced can be solved;
the method specifically comprises the following steps:
s1: setting signal protection; issuing a blocked construction command to start the operation, which specifically comprises:
the signal protection is arranged on the line of the seamless line laying section, the movable stop signal protection is arranged on the line, and the movable deceleration signal protection is arranged on the line.
S2: overlapping a return line at the start point and the end point of the change track section, which specifically comprises:
according to the standard of operation of two-longitudinal-one-transverse, two return lines are arranged along the track direction, one return line is arranged between two steel rails perpendicular to the track direction, and the installation section of the return line is not less than 70mm 2 。
S3: cutting existing steel rail, dismantling sleeper fastener of existing steel rail of change section, it specifically includes:
s301: cutting the existing steel rail, cutting a cutting opening every 300-500 m, and if the rail seam at the cutting opening is greater than 50mm, adding a short rail head under the cutting opening;
s302: the cutting openings of the existing steel rails are connected by clamping plates;
s303: and the sleeper fasteners of the rail changing section are disassembled, and at least one fastener is reserved for every forty sleepers during disassembly, so that the rail changing can be ensured to run safely and stably.
S4: the rail changing vehicle runs to change the rail, and the temperature delta T of the rail entering the rail bearing groove is collected and recorded Into (I) And the temperature delta T of the steel rail after falling into the rail bearing groove Falling down The method specifically comprises the following steps:
s401: the rail changing vehicle moves to a rail changing starting point, a new rail and an old rail are clamped and hung on rail hanging tongs of the rail changing vehicle, and a return line is switched to the new rail;
s402: measuring and recording the temperature delta T of the rail when the rail enters the rail bearing groove Into (I) The temperature measuring position is at the shade surface of the rail web of the steel rail;
s403: running a rail exchange vehicle to exchange the steel rail into the rail bearing groove, and detaching the reserved fastener when the rail exchange vehicle approaches the reserved fastener;
s404: measuring and recording temperature delta T of steel rail falling into rail bearing groove Falling down The temperature measuring position is at the shadow surface of the rail web of the steel rail.
S5: after the rail at the tap hole falls into the rail bearing groove, calculating the stretching amount of the rail according to the upsetting amount of the welding machine and the reserved rail gap of the tap hole:
stretching Δl=upsetting amount+reserved rail gap
Where Δl represents the amount of rail stretch.
S6: according to the temperature delta T of the steel rail entering the rail bearing groove Into (I) Temperature delta T of steel rail falling into rail bearing groove Falling down And calculating the length of the unit rail section steel rail by the stretching quantity delta l:
wherein Deltal represents the stretching amount of the steel rail and DeltaT Into (I) Indicating the temperature, deltaT, of the rail when it enters the rail-carrying groove Falling down Indicating the temperature of the steel rail falling into the rail bearing groove, T e Indicating the temperature of the locked rail, wherein L is the length of the unit rail section steel railDegree is the distance of the tap from the locked position.
S7: rail position locking, it specifically includes:
s701: determining a position which is a distance from the portal to the length L of the unit rail section rail as a starting locking position;
s702: the fastener is used to lock in the direction of the tail of the dragon from the starting locking position.
S8: stretching and folding the reserved rail joints at the positions of the closure openings; and then the upsetting amount is used as a stretching amount to stretch the steel rail from the tap hole to the locking position section towards the tap hole, the steel rail is welded with the paved steel rail after stretching, and finally the steel rail from the tap hole to the locking position section is locked, and the method specifically comprises the following steps:
s801: supporting rollers below the steel rail, wherein the rollers support one pad every 10 meters;
s802: stretching and folding the reserved rail joints at the positions of the open ends by using a welding machine;
s803: after folding, using a welding machine to stretch the steel rail from the tap hole to the locking position section towards the tap hole by taking the upsetting amount as the stretching amount;
s804: welding the stretched steel rail with the paved steel rail, wherein the upsetting amount during welding is the average upsetting amount of the welding machine;
s805: fasteners are used to lock the rail from the portal to the locked position section.
S9: stretching the steel rail to the direction of the dragon tail at the dragon tail, and connecting the stretched steel rail with the existing steel rail; finally locking the steel rail from the locking position to the dragon tail section; the method specifically comprises the following steps:
s901: supporting rollers below the steel rail, wherein the rollers support one pad every 10 meters;
s902: the rail is collided at the tail of the rail so as to release the internal stress of the rail; then using a stretcher to stretch the steel rail towards the tail direction;
s903: after stretching, connecting the steel rail with the existing steel rail through a joint clamping plate;
s904: and (3) adjusting the position of a large rubber cushion below the steel rail, locking the steel rail from the locking position to the dragon tail section through a fastener, and screwing a nut of the fastener by using an internal combustion bolt spanner during locking.
After the paving is finished, the short rail section is recovered by using a rail collecting vehicle, an oxygen cutting person cuts and disintegrates the old rail, and the old rail is placed on a ballast shoulder in a laying way to wait for recovery. After construction, the rail-changing operation vehicle is driven away after being grouped, and the grouping sequence is as follows: railcar + front flash + normalizing + change railcar + rear barometric pressure + railcar, as shown in figure 2. The flat car, the rail collecting car and the like can be added into the grouping according to the actual use condition, and the grouping sequence can be adjusted.
Before the seamless line laying construction operation, the method further comprises the following steps:
transporting the rail to a seamless track laying section by using a long rail transporting rail car;
unloading rails, namely unloading rails on the long rail transportation rail vehicle, wherein the unloading direction is the same as the construction direction;
and welding rails, namely welding the steel rails by adopting a movable rail welding vehicle, and normalizing the steel rail welding seams.
In the embodiment, the cutting opening is connected by a clamping plate after the existing steel rail is cut; at least one fastener is reserved for every forty sleepers when the sleeper fasteners of the rail changing section are disassembled. The cut existing steel rail also bears the rail changing vehicle to run, so that the cutting position needs to be connected by using a clamping plate to ensure that the connection of the existing steel rail is not interrupted; in order to ensure the stability of the existing steel rail, a part of fasteners are required to be reserved when the fasteners are detached, so that the safe running of the rail exchange vehicle is ensured.
In the embodiment, when the existing steel rail is cut, a cutting opening is cut every 300-500 meters; when the rail gap at the cutting opening is larger than 50mm, the short rail head is added. The existing line is required to be frequently replaced on the rail changing vehicle in the running of the rail changing vehicle when the length of the existing rail cutting section is too short, so that the construction efficiency is reduced; the existing steel rail cutting section is too long to be beneficial to the stability of the steel rail, and the stable running of the rail changing vehicle cannot be ensured, so that the cutting is most suitable for cutting every 300-500 meters. In the actual construction section, the curved section can also appropriately shorten the cutting distance.
In the embodiment, when the length L of the rail section of the unit is calculated, the temperature of the rail is used for operation, and in the scheme, the temperature delta T of the rail when entering the rail bearing groove is used Into (I) And the temperature delta T of the steel rail after falling into the rail bearing groove Falling down The average value of the unit track section steel rail length L is calculated more accurately as the steel rail temperature during operation; the part of the fasteners are detached when the rail changing vehicle runs to the reserved fasteners, so that the running safety of the rail changing vehicle is ensured.
In the embodiment, when the rail changing vehicle passes through the position of the tap hole and the tap tail, the return line needs to be switched to the newly paved steel rail in time, so that the uninterrupted return is ensured, and the electrical equipment is prevented from being burnt.
In this embodiment, the railcar is a railcar with a model number HGCZ-2000. The new generation seamless rail with the model of HGCZ-2000 developed in China is used for replacing the rail car, the running speed is high, the rail replacement efficiency is high, the construction method of matching with the middle locking of the rail and stretching at two ends can greatly improve the construction efficiency, and the construction skylight is reduced. The welded rail car adopts a self-propelled pneumatic welded rail car with the model number of YHGQ-1200.
Example 2
The embodiment provides a seamless line laying method adopting middle locking two-end stretching on the basis of embodiment 1, which is used for carrying out seamless line laying on a railway section from Hejin west to North Korea K493+370-K492+670, wherein 700 meters of change rails are used for construction in the laying process;
the method specifically comprises the following steps:
s1: setting signal protection; issuing a construction blocking command to start operation;
s2: overlapping a return line at the start point and the end point of the track change section;
s3: cutting the existing steel rail, and disassembling sleeper fasteners of the existing steel rail in the rail replacement section;
s4: using a rail changing machine with the model of HGCZ-2000, paving a new rail into a rail bearing groove; collecting and recording the temperature delta T of the steel rail when entering the rail bearing groove Into (I) And the temperature delta T of the steel rail after falling into the rail bearing groove Falling down The method comprises the steps of carrying out a first treatment on the surface of the Measuring the temperature delta T of the rail entering the rail bearing groove Into (I) At 18 ℃ and the temperature delta T of the steel rail after falling into the rail bearing groove Falling down 18 ℃;
s5: after the rail at the tap hole falls into the rail bearing groove, calculating the stretching quantity delta l of the rail according to the upsetting quantity of the welding machine and the reserved rail gap of the tap hole;
stretching Δl=upsetting amount+reserved rail gap
Taking the average upsetting amount of the welding machine as upsetting amount, wherein the average upsetting amount is 35mm; the reserved rail seam of the tap is 10mm; the total stretching amount Deltal was 45mm;
s6: according to the temperature delta T of the steel rail entering the rail bearing groove Into (I) Temperature delta T of steel rail falling into rail bearing groove Falling down And calculating the length L of the unit rail section steel rail by the stretching amount Deltal:
t of construction day e Calculating the length L of the unit track section steel rail to be 347 m at 29 ℃;
s7: the rail is locked, starting from 347 meters from the position of the tap hole, 50 meters is locked towards the tap tail direction;
s8: stretching and folding the reserved rail seam by 10mm at the tap hole by using a welding machine, stretching the reserved rail seam to the tap hole direction by using the welding machine by taking the upsetting amount as the stretching amount, welding the steel rail with the paved steel rail after stretching, and finally locking the steel rail from the tap hole to the locking position section by using a fastener;
s9: stretching the rest 353 m steel rail to the direction of the dragon tail by using a stretcher at the dragon tail, and connecting the stretched steel rail with the existing steel rail by using a clamping plate; finally, the rail from the locking position to the dragon tail section is locked by using the fastener.
Those of ordinary skill in the art will recognize that the embodiments herein are intended to assist the reader in understanding the principles of the invention and should be understood that the scope of the invention is not limited to such specific statements and embodiments. Those of ordinary skill in the art can make various other specific modifications and combinations from the teachings of the present disclosure without departing from the spirit of the invention, and such modifications and combinations are still within the scope of the invention.
Claims (10)
1. The seamless line laying method adopting middle locking two-end stretching is characterized by comprising the following steps:
s1: setting signal protection; issuing a construction blocking command to start operation;
s2: overlapping a return line at the start point and the end point of the track change section;
s3: cutting the existing steel rail; disassembling sleeper fasteners of existing steel rails of the rail changing section;
s4: the rail changing vehicle runs for rail changing, and the temperature when the steel rail enters the rail bearing groove and the temperature after the steel rail falls into the rail bearing groove are collected and recorded;
s5: after the rail at the tap hole falls into a rail bearing groove, calculating the stretching amount of the rail according to the upsetting amount of a welding machine and the reserved rail gap at the tap hole;
s6: calculating the length of the unit rail section rail according to the temperature of the rail entering the rail bearing groove, the temperature of the rail falling into the rail bearing groove and the stretching amount, and obtaining the distance between the tap hole and the locking position;
s7: locking the position of the steel rail; locking the unit rail section rail from the length of one rail section rail to the tail direction;
s8: stretching and folding the reserved rail gap at the position of the tap hole; then, the upsetting amount is used as a stretching amount to stretch the steel rail from the tap hole to the locking position section towards the tap hole, the steel rail is welded with the paved steel rail after stretching, and finally, the steel rail from the tap hole to the locking position section is locked;
s9: stretching the steel rail to the direction of the dragon tail at the dragon tail, and connecting the stretched steel rail with the existing steel rail; and finally locking the steel rail from the locking position to the dragon tail section.
2. The seamless line laying method using the intermediate lock two-head stretching as recited in claim 1, wherein: the return line is erected in the S2 according to a two-to-one transverse operation standard, and the installation section of the return line is not smaller than 70mm 2 。
3. The seamless line laying method using the intermediate lock two-head stretching as recited in claim 1, wherein S3 comprises the steps of:
s301: cutting the existing steel rail, cutting a cutting opening every 300-500 m, and if the rail gap at the cutting opening is greater than 50mm, adding a short rail head under the cutting opening;
s302: the cutting openings of the existing steel rails are connected by clamping plates;
s303: and disassembling sleeper fasteners of the rail change section, wherein at least one fastener is reserved for every forty sleepers during disassembly.
4. A seamless line laying method according to claim 3, wherein S4 comprises the steps of:
s401: the rail changing vehicle moves to a rail changing starting point, and a new rail and an old rail are clamped and hung on rail hanging tongs of the rail changing vehicle;
s402: recording the temperature of the steel rail when entering the rail bearing groove;
s403: running the rail changing vehicle to change the steel rail into the rail bearing groove, and detaching the reserved fastener when the rail changing vehicle approaches the reserved fastener;
s404: and recording the temperature of the steel rail falling into the rail bearing groove.
5. The seamless line laying method using the intermediate locking two-end stretching according to claim 1, wherein in S5, the stretching amount of the rail is calculated according to the upsetting amount of the welding machine and the reserved rail gap at the tap hole:
stretching Δl=upsetting amount+reserved rail gap
Where Δl represents the amount of rail stretch.
6. The method for laying a seamless line by adopting middle locking two-end stretching according to claim 1, wherein in the step S6, the length of the unit rail section is calculated according to the temperature when the rail enters the rail bearing groove, the temperature after the rail falls into the rail bearing groove and the stretching amount:
wherein Deltal represents the stretching amount of the steel rail and DeltaT Into (I) Indicating the temperature, deltaT, of the rail when it enters the rail-carrying groove Falling down Indicating the temperature of the steel rail falling into the rail bearing groove, T e And the locking rail temperature is represented, and L is the length of the unit rail section rail, namely the distance from the tap hole to the locking position.
7. The seamless line laying method using the intermediate lock two-head stretching as recited in claim 1, wherein: the step S7 comprises the following steps:
s701: determining a position which is one unit rail section rail length from the tap hole as a starting locking position;
s702: and locking the tail of the dragon by using a fastener from the starting locking position for 40-50 meters.
8. The seamless line laying method using the intermediate lock two-head stretching as recited in claim 1, wherein: the step S8 comprises the following steps:
s801: supporting a roller below the steel rail, wherein the roller supports one roller every 10 meters;
s802: stretching and folding the reserved rail seam at the tap hole by using a welding machine;
s803: after folding, using a welding machine to stretch the steel rail from the tap hole to the locking position section towards the tap hole by taking the upsetting amount as the stretching amount;
s804: welding the stretched steel rail with the paved steel rail;
s805: a fastener is used to lock the rail from the portal to the locked position section.
9. The seamless line laying method using the intermediate lock two-head stretching as recited in claim 8, wherein: the upset amount in S804 is an average upset amount of the welder.
10. The seamless line laying method using the intermediate lock two-head stretching as recited in claim 1, wherein: the step S9 comprises the following steps:
s901: supporting rollers below the steel rail, wherein the rollers support one roller every 10 meters;
s902: the rail is collided at the dragon tail to release the internal stress of the rail; stretching the steel rail towards the tail direction by using a stretcher;
s903: connecting the steel rail with the existing steel rail through a joint clamping plate after stretching;
s904: and (3) adjusting the position of a large rubber mat below the steel rail, locking the steel rail from the locking position to the dragon tail section through a fastener, and screwing a nut of the fastener by using an internal combustion bolt spanner during locking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311062259.4A CN116892139A (en) | 2023-08-21 | 2023-08-21 | Seamless line laying method adopting middle locking two-end stretching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311062259.4A CN116892139A (en) | 2023-08-21 | 2023-08-21 | Seamless line laying method adopting middle locking two-end stretching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116892139A true CN116892139A (en) | 2023-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311062259.4A Pending CN116892139A (en) | 2023-08-21 | 2023-08-21 | Seamless line laying method adopting middle locking two-end stretching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116892139A (en) |
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- 2023-08-21 CN CN202311062259.4A patent/CN116892139A/en active Pending
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