CN113718562B - Switch pre-paving and inserting construction method - Google Patents
Switch pre-paving and inserting construction method Download PDFInfo
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- CN113718562B CN113718562B CN202111005228.6A CN202111005228A CN113718562B CN 113718562 B CN113718562 B CN 113718562B CN 202111005228 A CN202111005228 A CN 202111005228A CN 113718562 B CN113718562 B CN 113718562B
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- turnout
- switch
- existing line
- force transmission
- transmission pulley
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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
- E01B7/00—Switches; Crossings
- E01B7/10—Frogs
-
- 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
- E01B29/02—Transporting, laying, removing, or renewing lengths of assembled track, assembled switches, or assembled crossings
Abstract
The invention provides a switch pre-paving and inserting construction method, which belongs to the field of railway engineering and comprises the following steps: pre-paving a turnout to be inserted beside an existing line; erecting a traction system; moving the turnout to be inserted to a bearing part of the unidirectional force transmission pulley, wherein the unidirectional force transmission pulley is positioned at one end of the tool rail far away from the existing line; removing the turnout of the existing line which needs to be replaced; the continuous jack applies tension to the traction cable to drive the unidirectional force transmission pulley to move along the tool rail until the switch to be inserted moves to the position where the switch is removed by the existing line; the turnout to be inserted is inserted into the existing line, and two ends of the turnout are connected with the existing line. The switch pre-paving and inserting construction method provided by the invention is beneficial to improving the switch replacement efficiency and saving the labor cost.
Description
Technical Field
The invention relates to the field of railway engineering, in particular to a switch pre-paving and inserting construction method.
Background
Under the large environment of the rapid development of national economy, the railway passenger and cargo station lines built in the early stage cannot meet the normal operation requirements, so that the existing passenger and cargo station lines are required to be lifted and reformed, the reforming construction is a very complex and difficult project, and the success and failure of the station yard reforming is the success and failure of the road-plug construction, so that the road-plug construction becomes a main focus.
In the construction of the switch, the switch is usually transferred by a guide rail and a pulley. Because the weight of the turnout is large, a large force is applied to the pre-paved turnout to realize smooth transfer of the turnout. During the transfer, a slight carelessness, i.e. a deflection of the load, may occur, resulting in a capsizing of the trolley. Therefore, in the construction process, it is often necessary to suspend the transfer process and correct the load direction, so that the construction efficiency is very low.
Disclosure of Invention
The invention provides a switch pre-paving and inserting construction method, which aims to solve the problems in the prior art.
The invention is realized in the following way:
a switch pre-paving construction insertion method is used for replacing a switch of an existing line and comprises the following steps:
pre-paving a turnout to be inserted beside an existing line;
the traction system is erected and comprises a continuous jack, a counter-force seat, a tool rail, a traction cable and a unidirectional force transmission pulley, wherein one end of the continuous jack is fixedly connected with the counter-force seat, the other end of the continuous jack is connected with the traction cable, one end of the tool rail is connected with the existing line, the unidirectional force transmission pulley comprises a base which is in sliding fit with the tool rail and a bearing part which is in sliding connection with the base relatively in a first direction, the first direction forms an included angle with the length extending direction of the tool rail, and the traction cable is connected with the base of the unidirectional force transmission pulley;
moving the switch to be inserted to a bearing part of the unidirectional force transmission pulley, wherein the unidirectional force transmission pulley is positioned at one end of a tool rail far away from the existing line;
removing the turnout of the existing line which needs to be replaced;
the continuous jack applies pulling force to the traction cable to drive the unidirectional force transmission pulley to move along the tool rail until the turnout to be inserted moves to the position where the turnout is removed by the existing line;
and inserting the turnout to be inserted into an existing line, and connecting the two ends of the turnout with the existing line.
Optionally, the tool rail includes a first wing plate and a second wing plate that are arranged substantially in parallel, and further includes a web plate connecting the first wing plate and the second wing plate;
the base of the unidirectional force transmission pulley comprises a travelling wheel and a frame body connected with the travelling wheel, the travelling wheel comprises a wheel body and end plates fixedly connected to two ends of the wheel body, the diameter of the end plates is larger than that of the wheel body, the cylindrical surface of the wheel body is used for being placed on the first wing plate in a rolling mode, and the bearing part is connected with the frame body.
Optionally, the frame body includes the connecting axle, the loading part is equipped with the guide slot, be equipped with in the guide slot can follow the guide block of guide slot slip, the guide block with the connecting axle passes through thrust bearing and connects.
Optionally, a rubber cushion layer is attached to the cylindrical surface.
Optionally, the unidirectional force transmission trolley further comprises a stabilizing assembly, the stabilizing assembly comprises a pair of clamping wheels rotatably connected to the frame body, the clamping wheels are respectively located on two sides of a web plate of the guide rail, and the upper portion of the clamping wheels is in contact with the first wing plate, and the lower portion of the clamping wheels is in contact with the second wing plate.
Optionally, the clamping wheel include with the rotatable hub of being connected of support body and cover are located the inflation layer of wheel hub outer lane, inflation layer with first pterygoid lamina with the contact of second pterygoid lamina.
Optionally, the clamping wheel is detachably connected with the frame body, and in the step of erecting the traction system:
the frame body is placed on the tool rail, then the clamping wheel is connected to the frame body, and the inflation layer is inflated.
Optionally, the step moves the switch to be inserted into the carrier of the unidirectional force transmission pulley:
and (3) moving the turnout to be inserted onto the bearing part of the unidirectional force transmission pulley by adopting a gate track jack.
Optionally, the step inserts the switch to be inserted into an existing line:
and inserting the turnout to be inserted into the existing line by adopting a gate track jack.
Optionally, leveling and compacting the field, and setting up a turnout pre-splicing platform in the selected field according to the measured position;
the turnout sleeper is distributed on a platform according to the number of the stages from small to large and the number of each stage, and a backing plate is installed by using threaded spikes;
lifting turnout steel rails assembled into parts to a turnout sleeper falling groove for positioning according to a turnout factory assembly drawing, paving an insulating buffer rubber cushion in a turnout sleeper bearing groove before falling, and centering for positioning according to a center line pile of a tested straight strand and a bent strand, wherein the straight strand is a track extending in a straight line direction in the turnout, and the bent strand is a track extending in a curve direction in the turnout;
after the straight strand steel rail is in place, marking the positions and the intervals of all the switch ties on the straight strand steel rail waist, shifting the switch ties to the mark point positions and reaching the standard of alignment of the straight strand side pillows, then finding out the positions of the straight strand switch tie points on the bent strands according to the straight strand directions and marking, and manually shifting the other ends of the switch ties to the bent strand positions;
spreading various accessories on each pillow in turn, and sequentially feeding the accessories on the screw nails without tightening;
correcting the track gauge and the correction position of the straight strand, and locking the straight strand steel rail; marking the points of each branch distance position, correcting the bent strand position according to the designed branch distance amount, correcting the bent strand positive track distance, correcting the bent strand central line, and locking the bent strand steel rail.
The beneficial effects of the invention are as follows: the invention provides a switch pre-paving and inserting construction method, which comprises the following steps: pre-paving a turnout to be inserted beside an existing line; the traction system is erected and comprises a continuous jack, a counter-force seat, a tool rail, a traction rope and a unidirectional force transmission pulley, wherein one end of the continuous jack is fixedly connected with the counter-force seat, the other end of the continuous jack is connected with the traction rope, one end of the tool rail is connected with an existing line, the unidirectional force transmission pulley comprises a base which is in sliding fit with the tool rail and a bearing part which is in sliding connection with the base in a first direction, an included angle is formed between the first direction and the length extension direction of the tool rail, and the traction rope is connected with the base of the unidirectional force transmission pulley; moving the turnout to be inserted to a bearing part of the unidirectional force transmission pulley, wherein the pulley is positioned at one end of the tool rail far away from the existing line; removing the turnout of the existing line which needs to be replaced; the continuous jack applies tension to the traction cable to drive the unidirectional force transmission pulley to move along the tool rail until the switch to be inserted moves to the position where the switch is removed by the existing line; the turnout to be inserted is inserted into the existing line, and two ends of the turnout are connected with the existing line. In the process of replacing the turnout, the traction force is continuously output through the continuous jack to pull the unidirectional force transmission pulley, and as the base and the bearing part of the unidirectional force transmission pulley can slide relatively in the first direction, if the turnout generates load deflection, the load deflection can be released through the relative sliding between the base and the bearing part, so that the load deflection is prevented from being converted into the overturning force acting on the base, the overturning of the unidirectional force transmission pulley caused by the load deflection can be well prevented, the load direction correction is not needed in the construction process, and the traction force is continuously output by matching with the continuous jack, thereby being beneficial to providing the construction efficiency.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a site layout of a switch pre-paving insertion construction method in an implementation process according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a unidirectional force transmission pulley matched with a guide rail according to an embodiment of the invention.
Fig. 3 is a partial enlarged view of a portion a in fig. 2.
Fig. 4 is a view looking into the carrier section in the direction B in fig. 2.
Fig. 5 is a flowchart of a switch pre-paving insertion construction method provided by an embodiment of the present invention.
Icon: 1-a continuous jack; 2-a counterforce seat; 3-traction ropes; 4-tool rails; 41-a first wing; 42-a second wing; 43-web; 5-a unidirectional force transmission pulley; 511-a frame; 512-wheel body; 513-end plates; 514-connecting plates; 515-hub; 516-an inflated layer; 52-a carrier; 521-guide grooves; 522-guide blocks; 524-thrust bearings; 53-connecting shaft; 6-existing lines; 7-switch to be inserted.
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. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
In the description of the present invention, it should be understood that the terms "orientation" or "positional relationship" are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and to simplify the description, rather than to indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.
Examples
Please refer to fig. 1 and 5. The embodiment of the invention provides a turnout pre-paving construction insertion method, which is used for replacing turnouts of the existing line 6 and comprises the following steps of:
s100, pre-paving a turnout 7 to be inserted beside an existing line 6;
step 200, erecting a traction system, wherein referring to fig. 1 and 2, the traction system comprises a continuous jack 1, a counter-force seat 2, a tool rail 4, a traction rope 3 and a unidirectional force transmission pulley 5, wherein one end of the continuous jack 1 is fixedly connected with the counter-force seat 2, the other end of the continuous jack is connected with the traction rope 3, one end of the tool rail 4 is connected with the existing line 6, the unidirectional force transmission pulley 5 comprises a base which is slidably matched with the tool rail 4, a bearing part 52 which is slidably connected with the base relatively in a first direction, the first direction forms an included angle with the length extending direction of the tool rail 4, and the traction rope 3 is connected with the base of the unidirectional force transmission pulley 5;
step S300, moving the turnout 7 to be inserted to the bearing part 52 of the unidirectional force transmission pulley 5, wherein the unidirectional force transmission pulley 5 is positioned at one end of the tool rail 4 far away from the existing line 6;
step S400, removing the turnout of the existing line 6 which needs to be replaced;
s500, the continuous jack 1 applies pulling force to the traction cable 3 to drive the unidirectional force transmission pulley 5 to move along the tool rail 4 until the turnout 7 to be inserted moves to the position where the turnout 6 is removed;
and S600, inserting the turnout 7 to be inserted into the existing line 6, and connecting two ends of the turnout 7 with the existing line 6.
According to the method for inserting the switch pre-paving construction, provided by the embodiment of the invention, in the process of replacing the switch, the continuous jack 1 continuously outputs traction force to pull the unidirectional force transmission pulley 5, and as the base and the bearing part 52 of the unidirectional force transmission pulley 5 can slide relatively in the first direction, if load deflection occurs to the switch, the load deflection can be released through the relative sliding between the base and the bearing part 52, so that the load deflection is prevented from being converted into the overturning force acting on the base, the overturning of the unidirectional force transmission pulley 5 caused by the load deflection can be well prevented, the load direction correction is not needed to be carried out in the suspension construction process, and the continuous jack 1 is matched to continuously output traction force, thereby being beneficial to providing construction efficiency.
In some embodiments, the construction sequence of step S100 and step S200 may be exchanged or performed simultaneously.
In some embodiments, step S100 specifically includes:
s11, leveling and compacting the field, and setting up a turnout pre-splicing platform in the selected field according to the measured position;
s12, distributing the switch tie on the platform according to the number of stages from small to large and the number of each stage, and installing a backing plate by using threaded spikes;
s13, lifting the turnout steel rails assembled into parts to a falling groove on a turnout sleeper to be in place according to a turnout factory assembly drawing, paving an insulating buffer rubber cushion in a turnout sleeper rail bearing groove before falling, and centering to be in place according to a tested straight strand and a center line pile of a bent strand, wherein the straight strand is a track extending in a straight line direction in the turnout, and the bent strand is a track extending in a curve direction in the turnout;
s14, after the straight strand steel rail is in place, marking the positions and the intervals of all the switch ties on the straight strand steel rail waist, shifting the switch ties to the mark point positions and reaching the standard of alignment of the straight strand side pillows, then finding out the positions of the straight strand switch tie points on the bent strands according to the straight strand direction and marking, and manually shifting the other ends of the switch ties to the bent strand positions;
s15, dispersing various accessories on each pillow in sequence, and sequentially feeding the accessories onto the screw nails without tightening;
s16, correcting the track gauge and the correction position of the straight strand, and locking the straight strand steel rail; marking the points of each branch distance position, correcting the bent strand position according to the designed branch distance amount, correcting the bent strand positive track distance, correcting the bent strand central line, and locking the bent strand steel rail.
In some embodiments, step S200 includes:
s21, pouring to form a counterforce seat 2;
specifically, the reaction seat 2 is a reinforced concrete structure. The counter-force seat 2 is provided with a through hole for the traction rope 3 to pass through.
S22, installing a continuous jack 1;
the continuous jack 1 may be provided as an intelligent continuous jack 1, and specifically, an intelligent continuous jack 1 of the ZLD series type may be selected for continuously outputting traction force.
S23, installing a tool rail 4 and a unidirectional force transmission pulley 5;
in particular, please refer to fig. 2-4. The tool rail 4 comprises a first wing 41 and a second wing 42 arranged substantially in parallel, and a web 43 connecting the first wing 41 and the second wing 42. In other words, the tool rail 4 has a substantially "i" shaped cross section.
The base of the unidirectional force transfer pulley 5 comprises a travelling wheel and a frame 511. The travelling wheel comprises a wheel body 512 and end plates 513 fixedly connected to two ends of the wheel body 512, the diameter of the end plates 513 is larger than that of the wheel body 512, the cylindrical surface of the wheel body 512 is used for being placed on the first wing plate 41 in a rolling mode, the end plates 513 at two ends of the wheel body 512 are placed on two sides of the first wing plate 41, and therefore the travelling wheel can play a role in clamping to a certain extent, and the wheel body 512 is prevented from being separated from the first wing plate 41. The bearing portion 52 is connected to the frame 511, specifically, the frame 511 includes a connection shaft 53, the bearing portion 52 is provided with a guide groove 521, a guide block 522 that can slide along the guide groove 521 is provided in the guide groove 521, and the cross-sectional shape of the guide block 522 and the guide groove 521 are substantially adapted. For example, the guide groove 521 may be provided as a dovetail groove, and the cross section of the guide block 522 may be provided as a dovetail shape. By the engagement of the guide blocks 522 with the guide grooves 521, the relative sliding between the frame 511 and the bearing 52 can be achieved, thereby helping to release the force generated by the load displacement in the direction along the guide grooves 521 when the load displacement occurs. The guide block 522 is connected to the connecting shaft 53 through the thrust bearing 524, in other words, the guide block 522 and the connecting shaft 53 can rotate relatively, so that the bearing portion 52 can rotate relatively with respect to the frame 511, which helps to release the torque generated by the load offset.
The cylindrical surface of the wheel body 512 is provided with a rubber cushion layer, that is, the surface of the wheel body 512, which can be in rolling contact with the first wing plate 41, is provided with the rubber cushion layer, so that impact load of the wheel body 512 in the rolling process relative to the first wing plate 41 can be relieved.
The unidirectional force transmission pulley 5 further comprises a stabilizing assembly, wherein the stabilizing assembly comprises a pair of clamping wheels rotatably connected to the frame 511, specifically, the pair of clamping wheels are respectively located on two sides of the web 43 of the guide rail, and the upper parts of the clamping wheels are in contact with the first wing plates 41, and the lower parts of the clamping wheels are in clearance with the second wing plates 42. Further, each clamping wheel is disposed on a connecting plate 514, and the connecting plate 514 is detachably and fixedly connected with the frame body. The clamping wheel comprises a hub 515 and an inflation layer 516, wherein the hub 515 is rotatably connected with the connecting plate 514, and the inflation layer 516 is sleeved on the outer ring of the hub 515. When the inflation layer 516 is in a deflation state, the connecting plate 514 is connected to the frame body, at this time, the inflation layer 516 is located between the first wing plate 41 and the second wing plate 42, gaps are reserved between the inflation layer 516 and the first wing plate 41 and between the inflation layer 516 and the second wing plate 42, the inflation layer 516 is inflated, and accordingly the inflation layer 516 is in contact with the first wing plate 41, and gaps are reserved between the inflated inflation layer 516 and the second wing plate 42. After the clamping wheels on two sides are inflated to be in contact with the first wing plate 41, further rollover prevention effect can be achieved through the tight contact between the clamping wheels and the first wing plate 41. And a gap is left between the clamping wheel and the second wing plate 42, so that the clamping wheel can freely rotate, and the rotation of the clamping wheel is prevented from being limited.
Based on the above structure, step S23 specifically includes:
s231, installing a tool rail 4;
s232, placing a base and a bearing plate of the unidirectional force transmission pulley 5 on the tool rail 4;
specifically, the frame body of the base is placed on the tool rail 4, and the rubber cushion layer outside the wheel body 512 is contacted with the top surface of the first wing plate 41 of the tool rail 4;
s233, connecting a connecting plate 514 of the unidirectional force transmission pulley 5 to a frame body of a base, wherein an inflation layer 516 of the clamping wheel is in an deflation state;
s234, inflating the inflation layer 516 of the clamping wheel to enable the inflation layer 516 of the clamping wheel to be in contact with the first wing plate 41.
Through the steps, the unidirectional force transmission pulley can be conveniently installed, and the rollover prevention effect is realized.
Step S200 further includes:
s24, installing a traction rope 3;
one end of the traction rope 3 is fixed on the turnout, and the other end is anchored on the continuous jack 1. The middle part of the traction rope 3 passes through the through hole on the counter-force seat 2.
In some embodiments, step S300 specifically includes: the switch 7 to be inserted is lifted by the gate track jack, the switch is temporarily supported by the short wood sleeper, and at this time, all the weight of the switch 7 to be inserted is borne by the gate track jack and the temporary short wood sleeper, and the switch 7 to be inserted is transferred to the bearing part 52 of the unidirectional force transmission pulley 5.
In some embodiments, step S600 specifically includes: the turnout 7 to be inserted is lifted from the unidirectional force transmission pulley 5 through the gate track jack, the turnout is temporarily supported by the short wood sleeper, at the moment, all the weight of the turnout 7 to be inserted is borne by the gate track jack and the temporary short wood sleeper, the turnout 7 to be inserted is transferred into the existing line 6, and two ends of the turnout 7 to be inserted are connected with the line. Further, when connecting an inserted switch with a circuit: punching holes at preset positions by a punching machine, and connecting lines by an insulating clamping plate.
The turnout pre-paving construction insertion method provided by the embodiment has good offset load release capability, and can prevent system instability caused by load offset, so that repeated shutdown and manual load adjustment are not needed, the continuous jack 1 can continuously output traction force, the turnout construction efficiency can be obviously improved, and the manual labor input can be obviously reduced.
According to the prediction, if the traditional mode in the prior art is adopted, the time for pre-paving and inserting the turnout in a certain project is about 300 minutes, and 180-200 people are needed. By adopting the method provided in this embodiment, since the construction correction load is not required to be frequently suspended, it is expected that only 180 minutes are required, and the number of people is about 30.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, and various modifications and variations may 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 (6)
1. The switch pre-paving construction insertion method is characterized by comprising the following steps of:
pre-paving a turnout to be inserted beside an existing line;
the traction system is erected and comprises a continuous jack, a counter-force seat, a tool rail, a traction cable and a unidirectional force transmission pulley, wherein one end of the continuous jack is fixedly connected with the counter-force seat, the other end of the continuous jack is connected with the traction cable, one end of the tool rail is connected with the existing line, the unidirectional force transmission pulley comprises a base which is in sliding fit with the tool rail and a bearing part which is in sliding connection with the base relatively in a first direction, the first direction forms an included angle with the length extending direction of the tool rail, and the traction cable is connected with a turnout to be inserted;
moving the switch to be inserted to a bearing part of the unidirectional force transmission pulley, wherein the unidirectional force transmission pulley is positioned at one end of a tool rail far away from the existing line;
removing the turnout of the existing line which needs to be replaced;
the continuous jack applies pulling force to the traction cable to drive the unidirectional force transmission pulley to move along the tool rail until the turnout to be inserted moves to the position where the turnout is removed by the existing line;
inserting the turnout to be inserted into an existing line, and connecting two ends of the turnout with the existing line;
the tool rail comprises a first wing plate and a second wing plate which are arranged in parallel basically, and a web plate for connecting the first wing plate and the second wing plate;
the base of the unidirectional force transmission pulley comprises a travelling wheel and a frame body connected with the travelling wheel, the travelling wheel comprises a wheel body and end plates fixedly connected to two ends of the wheel body, the diameter of the end plates is larger than that of the wheel body, the cylindrical surface of the wheel body is used for being placed on the first wing plate in a rolling manner, and the bearing part is connected with the frame body;
a rubber cushion layer is attached to the cylindrical surface;
the unidirectional force transmission pulley further comprises a stabilizing assembly, the stabilizing assembly comprises a pair of clamping wheels rotatably connected to the frame body, the clamping wheels are respectively positioned on two sides of a web plate of the guide rail, the upper parts of the clamping wheels are in contact with the first wing plates, and gaps are reserved between the lower parts of the clamping wheels and the second wing plates;
the clamping wheel comprises a wheel hub rotatably connected with the frame body and an inflation layer sleeved on the outer ring of the wheel hub, and the inflation layer is in contact with the first wing plate.
2. The switch pre-paving method as set forth in claim 1, wherein the frame body includes a connection shaft, the bearing portion is provided with a guide groove, a guide block capable of sliding along the guide groove is provided in the guide groove, and the guide block is connected with the connection shaft through a thrust bearing.
3. The switch pre-paving method of claim 1, wherein said clamp wheel is removably connected to said frame, and wherein said step of erecting a traction system:
the frame body is placed on the tool rail, then the clamping wheel is connected to the frame body, and the inflation layer is inflated.
4. A switch pre-laying construction method according to any one of claims 1-3, wherein said step of pre-laying the switch to be inserted beside the existing line comprises the steps of:
and (3) moving the turnout to be inserted onto the bearing part of the unidirectional force transmission pulley by adopting a gate track jack.
5. A switch pre-laying method according to any one of claims 1-3, characterized in that said step inserts said switch to be inserted into an existing line:
and inserting the turnout to be inserted into the existing line by adopting a gate track jack.
6. A switch pre-laying construction method according to any one of claims 1-3, wherein said step of pre-laying the switch to be inserted beside the existing line comprises the steps of:
leveling and compacting the field, and setting up a turnout pre-splicing platform in the selected field according to the measured position;
the turnout sleeper is distributed on a platform according to the number of the stages from small to large and the number of each stage, and a backing plate is installed by using threaded spikes;
lifting turnout steel rails assembled into parts to a turnout sleeper falling groove for positioning according to a turnout factory assembly drawing, paving an insulating buffer rubber cushion in a turnout sleeper bearing groove before falling, and centering for positioning according to a center line pile of a tested straight strand and a bent strand, wherein the straight strand is a track extending in a straight line direction in the turnout, and the bent strand is a track extending in a curve direction in the turnout;
after the straight strand steel rail is in place, marking the positions and the intervals of all the switch ties on the waist of the straight strand steel rail, shifting the switch ties to the punctuation positions and reaching the standard of alignment of the straight strand side pillows, then finding out the positions of the straight strand switch tie points on bent strands according to the straight strand direction and marking, and manually shifting the other ends of the switch ties to the bent strand positions;
spreading various accessories on each pillow in turn, and sequentially feeding the accessories on the screw nails without tightening;
correcting the track gauge and the correction position of the straight strand, and locking the straight strand steel rail; marking the points of each branch distance position, correcting the bent strand position according to the designed branch distance amount, correcting the bent strand positive track distance, correcting the bent strand central line, and locking the bent strand steel rail.
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| CN202111005228.6A CN113718562B (en) | 2021-08-30 | 2021-08-30 | Switch pre-paving and inserting construction method |
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| CN202111005228.6A CN113718562B (en) | 2021-08-30 | 2021-08-30 | Switch pre-paving and inserting construction method |
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