CN116657448A - Construction method of movable point switch - Google Patents
Construction method of movable point switch Download PDFInfo
- Publication number
- CN116657448A CN116657448A CN202310785944.3A CN202310785944A CN116657448A CN 116657448 A CN116657448 A CN 116657448A CN 202310785944 A CN202310785944 A CN 202310785944A CN 116657448 A CN116657448 A CN 116657448A
- Authority
- CN
- China
- Prior art keywords
- switch
- rail
- turnout
- point
- frog
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010276 construction Methods 0.000 title claims abstract description 43
- 238000009434 installation Methods 0.000 claims abstract description 37
- 238000002360 preparation method Methods 0.000 claims abstract description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 48
- 241001669679 Eleotris Species 0.000 claims description 26
- 238000013461 design Methods 0.000 claims description 26
- 229910052742 iron Inorganic materials 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 19
- 238000012360 testing method Methods 0.000 claims description 13
- 238000005452 bending Methods 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000009966 trimming Methods 0.000 claims description 6
- 102000004315 Forkhead Transcription Factors Human genes 0.000 claims description 5
- 108090000852 Forkhead Transcription Factors Proteins 0.000 claims description 5
- 230000000712 assembly Effects 0.000 claims description 5
- 238000000429 assembly Methods 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 230000036544 posture Effects 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 5
- 125000006850 spacer group Chemical group 0.000 claims description 5
- 238000013102 re-test Methods 0.000 claims description 4
- 238000013519 translation Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 description 7
- 230000009471 action Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
-
- 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
- E01B29/02—Transporting, laying, removing, or renewing lengths of assembled track, assembled switches, or assembled crossings
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Railway Tracks (AREA)
Abstract
The invention relates to the technical field of rail transit, in particular to a construction method of a movable-center turnout, which can accurately, reliably and efficiently realize the installation of movable-center rail turnouts of urban rail transit and comprises the following steps: construction preparation, foundation marking, railway ballast paving, scattered paving of switch ties, on-site assembly of a switch, hoisting and storage of the switch, assembly of the switch, rough adjustment of the switch, installation of electrical equipment, ballast feeding and complete adjustment of the switch.
Description
Technical Field
The invention relates to the technical field of rail transit, in particular to a construction method of a movable-point turnout.
Background
With the development of urban rail traffic technology, the development of vibration and noise reduction of the surrounding environment of the subway and the upper cover property of the vehicle section gradually become trend. The small-number (for example, no. 7) movable point rail turnout is used as a product developed for the development of vibration reduction requirements of the upper cover property, eliminates harmful spaces of turnout areas, realizes continuous track lines, effectively reduces dynamic response generated when a train passes through the harmful spaces of frog, and realizes vibration reduction of the origin of a turnout structure.
The small number (including No. 7, no. 9) switch that present subway is commonly used is fixed frog, and fixed frog wholeness is high, and because not installing electric business conversion equipment, the frog department need not the joint debugging of worker and allies oneself with the examination, and present construction unit adopts "normal position method" to construct and lay mostly, and the main steps are as follows:
(1) Pre-paving railway ballast at a railway line design position in advance;
(2) Transporting the switch tie to a specified switch position through mechanical equipment, and paving the switch tie according to the switch tie spacing specified by a design drawing;
(3) Hoisting the turnout rail pieces to enter the field to finish the assembly of the turnout and the size adjustment of the frame on site;
(4) The turnout state is adjusted, and the connection between the turnout and the line is completed after the turnout is completed;
(5) Ballasting and finishing, checking the turnout state for the second time and performing fine adjustment;
(6) The switch machine is installed on the switch machine to carry out joint debugging and joint testing.
Compared with small number (e.g. 7) switch points of fixed frog, the small number (e.g. 7) movable point rail frog adopts a movable point structure, which has the following differences:
(1) The movable point rail frog is assembled by a plurality of parts such as wing rails, long and short point rails, a dislocation device, a heel end interval iron, an anti-jump interval iron, a top iron, a bolt and the like, is an assembled structure and is complex in field installation.
(2) The long and short rails of the movable frog are movable, and the frame adjustment is different from the fixed frog.
(3) A switch is added at the position of the movable point rail frog, and the requirement on the laying precision of the frog part is higher because of the requirement of the power and mechanical adjustment and the connection test, so that the influence of the laying precision on the point rail pulling is avoided.
Disclosure of Invention
The embodiment of the invention provides a movable-center turnout construction method which can accurately, reliably and efficiently realize the installation of movable-center rail turnouts of urban rail transit.
According to an embodiment of the present invention, there is provided a movable-point switch construction method for an urban rail system, including:
step 1, construction preparation: checking a turnout construction drawing and related materials, determining reserved interfaces, cables and embedded pipelines at the position of a movable point frog, checking the number and the types of all parts of the turnout, checking the installation limit space of a movable point frog position switch machine, and checking the jumper hole positions of long and short point rails to ensure the installation of the cables;
step 2, basic marking: retest the route and set up the control basic mark along the route according to the norm, encrypt the control basic mark in the range of the movable frog, in order to guarantee the laying precision, arrange the control basic mark in front of fork, behind fork and position of the fork centre of the turnout along the outside of stock track, and add the control basic mark in the traction point of the core rail, flexible centre point, encrypt the control basic mark in the lateral track gauge change place of the turnout and position of the support distance;
step 3, paving railway ballast: paving the bottom layer railway ballast, and layering and rolling by adopting a road roller with the pressure not less than 160kpa to ensure that the density of the bottom layer railway ballast is not less than 1.6g/cm 3 Checking the flatness of the ballast surface to ensure that the error in each direction is not more than 10mm;
step 4, scattered-spread switch tie: and the switch tie is hoisted and placed according to the design requirement by utilizing a man-machine matching mode, and the concrete steps are as follows:
(1) Before the switch tie is hoisted, the center line of the switch is controlled in a stay wire mode;
(2) Determining the position and the direction of a switch tie No. 1, and ensuring that the center line of the switch tie No. 1 is longitudinally coincident with the center line of the switch and is transversely perpendicular to the center line of the switch;
(3) Except for the range of the movable point frog, the No. 1 switch tie is used as a reference, switch tie intervals are sequentially paved, and the outside of the bearing rail surfaces at the two ends is subjected to pull rule control during paving, so that the parallel and vertical to the No. 1 switch tie is ensured, the accumulated error of the switch tie interval is eliminated, and the position deviation of the switch tie is ensured to be within +/-3 mm;
(4) In the range of the movable point frog, taking a control base mark at the frog as a reference to lay sleepers at two sides of the frog, then laying the sleepers to two sides sequentially according to the designed spacing of the sleepers, and keeping the position deviation of the sleepers at the two sides of the traction point within +/-2 mm in the range of the movable point frog;
(5) The method comprises the steps of taking a No. 1 switch tie as a reference square switch tie and matching with switch tie spacing adjustment, wherein the switch tie positioning is determined by taking a bolt hole of a first switch tie on the outer side of a straight strand as a reference stay wire, and the switch tie square is placed in parallel by two long bars and aligned according to the switch tie spacing;
(6) After the turnout sleeper is square, the control base mark is taken as a base point, the position of the scattered turnout sleeper is rechecked, the laying precision of the turnout sleeper is ensured, the rechecked sleeper spacing in the range of the movable point frog is included, and the rail piece installation and the size adjustment are prevented from being difficult;
step 5, on-site assembly of the turnout: in the range of the switch, the straight stock rail is assembled with Qu Jiangui, and the curved stock rail is assembled with the straight switch rail; in the range of the movable point frog, firstly, assembling wing rails at two sides, wherein the assembling comprises the installation of a backing plate and a top iron; when the long and short core rails and the middle dislocation device are fixed through bolts, the whole wing rail is pushed into the center position of the wing rail, and the heel end of the wing rail is connected with the long and short core rails through a spacer iron;
step 6, hoisting and storing the turnout: marking a center position of a turnout sleeper on the top surface of a turnout steel rail so as to facilitate the positioning between the spot and the turnout sleeper, and then stably transferring the assembled straight stock rail-curved switch rail assembly, curved stock rail-straight switch rail assembly, wing rail-long and short switch rail assemblies to a working surface;
step 7, assembling the turnout: from the fork head, according to the principle of firstly straightening, then bending, firstly switching the device and then switching the frog, scattering the rails in sequence from front to back, shifting the rails into the rail bearing groove, and then connecting the rail alignment position; installing a switch rail and a stock rail assembly and centering; the movable point rail frog is arranged in a whole translation way so as to ensure that indexes between long and short point rails and wing rails are normal; paving a connecting rail, and reserving a rail seam of 8 mm; except for the movable frog, other positions are sequentially provided with buckling fittings and are aligned and straightened;
step 8, rough turnout adjustment: in the range of the switch, combining control basic marks at the switch and adjusting the basic rails of the switch according to the principle of firstly straightening the basic rails and then bending the basic rails so as to ensure the straight rail direction, the height and the horizontal postures of the switch, installing switch fasteners in sequence, measuring the rail distance and the branch distance of each part by taking the straight strand as the reference, adjusting according to the requirement, and fastening the switch fasteners according to the designed torque after adjusting in place; in the range of the movable frog, detecting the sizes of the throat and rim grooves of the frog, using a crow bar to pry the combined long and short core rails to positions and opposite positions respectively, checking the close contact condition of the core rails and wing rails on the premise of not installing electric equipment, and loosening a heel end interval iron bolt if the close contact condition is poor so as to ensure that the long and short core rails are close contact with the wing rails respectively on the premise of prying by the crow bar;
step 9, installing electrical equipment: after the overall size rough adjustment of the turnout is qualified, installing an electric service point switch, wherein the electric service point switch comprises installation of the point switch and the frog point switch and joint rough adjustment between the electric service points;
step 10, ballasting and finishing: carrying out track feeding on the ballasts discharged on two sides of the line, trimming a track bed, and carrying out ballasting and track bed tamping, wherein the track feeding and track finishing are carried out three times; wherein the ballast tamping is performed a plurality of times within the range of the movable point frog;
step 11, fine tuning of the turnout: the turnout fine adjustment is carried out according to the requirements, the branch distance and the frame size of the switch are guaranteed to meet the design requirements, the frame size, the rim groove and the throat size of the movable frog part are adjusted to meet the design requirements, and the power and construction joint adjustment and the joint test are carried out.
Preferably, in any embodiment, step 10 comprises:
after the ballast bed is tamping, measuring whether the gap between the long point rail and the anti-jump interval iron meets the design range, if the gap exceeds the allowable tolerance, measuring the level and the height of the movable point frog, adjusting in a mechanical track lifting mode, and tamping the ballast bed by using a small-sized tamping machine.
Preferably, in any embodiment, after step 11, the method further comprises:
step 12, overall rechecking of the turnout: and after the completion of the power and engineering combined fine adjustment, the whole turnout is rechecked, and the rechecked of each control item point of the turnout, the check of the fastener bolt and the rechecked work are included, so that the installation integrity is ensured.
Preferably, in any embodiment, step 11 comprises:
the switch fine tuning is carried out, so that the requirements of 2mm locking and 4mm unlocking of the switch rail and the stock rail are realized under the condition that an electric switch machine is pulled.
Preferably, in any embodiment, step 11 comprises:
the fine tuning of the turnout is carried out to realize the close contact between the long and short point rails, the close contact between the long and short point rails and the wing rails respectively, and the dislocation quantity of the long and short point rails during the pulling meets the requirements.
Preferably, in any embodiment, step 11 comprises:
and carrying out a pulling force test through a switch machine.
The movable center turnout construction method provided by the embodiment of the invention can accurately, reliably and efficiently realize the movable center turnout installation of urban rail transit.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following discussion will discuss the embodiments or the drawings required in the description of the prior art, and it is obvious that the technical solutions described in connection with the drawings are only some embodiments of the present invention, and that other embodiments and drawings thereof can be obtained according to the embodiments shown in the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flow chart of a movable point switch construction method according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of the setting of the control basic marks of the branch region according to the embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings, wherein it is apparent that the embodiments described are only some, but not all embodiments of the present invention. All other embodiments, which can be made by a person of ordinary skill in the art without the need for inventive faculty, are within the scope of the invention, based on the embodiments described in the present invention.
The small number (including 7 and 9) movable point rail turnout is a product developed for damping in urban rail transit (such as subway) turnout areas, is developed for the first time in China, and has no mature construction method for the small number movable point rail turnout in China at present due to the difference from the traditional fixed frog structure. Because the whole mass of the movable point frog is larger, a reasonable turnout paving process is needed to ensure the turnout paving quality.
The embodiment of the invention provides a movable-center turnout construction method which can accurately, reliably and efficiently realize the installation of movable-center rail turnouts of urban rail transit.
According to an embodiment of the present invention, there is provided a movable-point switch construction method for an urban rail system, including:
step 1, construction preparation: checking a turnout construction drawing and related materials, determining reserved interfaces, cables and embedded pipelines at the position of a movable point frog, checking the number and the types of all parts of the turnout, checking the installation limit space of a movable point frog position switch machine, and checking the jumper hole positions of long and short point rails to ensure the installation of the cables;
step 2, basic marking: retest the route and set up the control basic mark along the route according to the norm, encrypt the control basic mark in the range of the movable frog, in order to guarantee the laying precision, arrange the control basic mark in front of fork, behind fork and position of the fork centre of the turnout along the outside of stock track, and add the control basic mark in the traction point of the core rail, flexible centre point, encrypt the control basic mark in the lateral track gauge change place of the turnout and position of the support distance;
step 3, paving railway ballast: paving the bottom layer railway ballast, and layering and rolling by adopting a road roller with the pressure not less than 160kpa to ensure thatThe density of the bottom layer railway ballast is not less than 1.6g/cm 3 Checking the flatness of the ballast surface to ensure that the error in each direction is not more than 10mm;
step 4, scattered-spread switch tie: and the switch tie is hoisted and placed according to the design requirement by utilizing a man-machine matching mode, and the concrete steps are as follows:
(1) Before the switch tie is hoisted, the center line of the switch is controlled in a stay wire mode;
(2) Determining the position and the direction of a switch tie No. 1, and ensuring that the center line of the switch tie No. 1 is longitudinally coincident with the center line of the switch and is transversely perpendicular to the center line of the switch;
(3) Outside the range of the movable point frog, taking the No. 1 switch tie as a reference, sequentially paving the switch ties at intervals, and carrying out scale drawing control on the outer sides of the bearing rail surfaces at the two ends during paving to ensure that the switch ties are parallel and perpendicular to the No. 1 switch tie so as to eliminate the accumulated error of the switch tie spacing and ensure that the position deviation of the switch tie is within +/-3 mm;
(4) In the range of the movable point frog, taking a control base mark at the frog as a reference to lay sleepers at two sides of the frog, then laying the sleepers to two sides sequentially according to the designed spacing of the sleepers, and keeping the position deviation of the sleepers at the two sides of the traction point within +/-2 mm in the range of the movable point frog;
(5) The method comprises the steps of taking a No. 1 switch tie as a reference square switch tie and matching with switch tie spacing adjustment, wherein the switch tie positioning is determined by taking a bolt hole of a first switch tie on the outer side of a straight strand as a reference stay wire, and the switch tie square is placed in parallel by two long bars and aligned according to the switch tie spacing;
(6) After the turnout sleeper is square, the control base mark is taken as a base point, the position of the scattered turnout sleeper is rechecked, the laying precision of the turnout sleeper is ensured, the rechecked sleeper spacing in the range of the movable point frog is included, and the rail piece installation and the size adjustment are prevented from being difficult;
step 5, on-site assembly of the turnout: in the range of the switch, the straight stock rail is assembled with Qu Jiangui, and the curved stock rail is assembled with the straight switch rail; in the range of the movable point frog, firstly, assembling wing rails at two sides, wherein the assembling comprises the installation of a backing plate and a top iron; when the long and short core rails and the middle dislocation device are fixed through bolts, the whole wing rail is pushed into the center position of the wing rail, and the heel end of the wing rail is connected with the long and short core rails through a spacer iron;
step 6, hoisting and storing the turnout: marking a center position of a turnout sleeper on the top surface of a turnout steel rail so as to facilitate the positioning between the spot and the turnout sleeper, and then stably transferring the assembled straight stock rail-curved switch rail assembly, curved stock rail-straight switch rail assembly, wing rail-long and short switch rail assemblies to a working surface;
step 7, assembling the turnout: from the fork head, according to the principle of firstly straightening, then bending, firstly switching the device and then switching the frog, scattering the rails in sequence from front to back, shifting the rails into the rail bearing groove, and then connecting the rail alignment position; installing a switch rail and a stock rail assembly and centering; the movable point rail frog is arranged in a whole translation way so as to ensure that indexes between long and short point rails and wing rails are normal; paving a connecting rail, and reserving a rail seam of 8 mm; except for the movable frog, other positions are sequentially provided with buckling fittings and are aligned and straightened;
step 8, rough turnout adjustment: in the range of the switch, combining control basic marks at the switch and adjusting the basic rails of the switch according to the principle of firstly straightening the basic rails and then bending the basic rails so as to ensure the straight rail direction, the height and the horizontal postures of the switch, installing switch fasteners in sequence, measuring the rail distance and the branch distance of each part by taking the straight strand as the reference, adjusting according to the requirement, and fastening the switch fasteners according to the designed torque after adjusting in place; detecting the sizes of the throat and rim grooves in the range of the movable frog, prying the combined long and short core rails to positions and opposite positions respectively by using a pry bar, checking the natural close condition of the core rail and the wing rail on the premise of not installing electric equipment, and loosening a heel end interval iron bolt if the close condition is poor so as to ensure that the long and short core rails are close to the wing rail respectively on the premise of prying by using the pry bar;
step 9, installing electrical equipment: after the overall size rough adjustment of the turnout is qualified, installing an electric service point switch, wherein the electric service point switch comprises installation of the point switch and the frog point switch and joint rough adjustment between the electric service points;
step 10, ballasting and finishing: carrying out track feeding on the ballasts discharged on two sides of the line, trimming a track bed, and carrying out ballasting and track bed tamping, wherein the track feeding and track finishing are carried out three times; wherein the ballast tamping is performed a plurality of times within the range of the movable point frog;
step 11, fine tuning of the turnout: the turnout fine adjustment is carried out according to the requirements, the branch distance and the frame size of the switch are guaranteed to meet the design requirements, the frame size, the rim groove and the throat size of the movable frog part are adjusted to meet the design requirements, and the power and construction joint adjustment and the joint test are carried out.
Thus, through the steps, the assembly and the field installation of each part of the movable point switch frog are realized, the high-precision laying of the movable point switch is realized through rough adjustment and fine adjustment of the switch in stages, meanwhile, the combined adjustment and the joint test of the power and the electricity are realized, and the reliability and the safety of the whole quality of the switch are ensured.
Therefore, the movable center turnout construction method provided by the embodiment of the invention can accurately, reliably and efficiently realize movable center turnout installation of urban rail transit.
Optionally, in any embodiment, the method for constructing the movable-point switch is used for paving the movable-point switch with a small radius (small number, such as number 7, number 9 or smaller) below 150m, so that the accuracy of paving the switch can be effectively improved and the construction efficiency can be improved.
Preferably, in any embodiment, step 10 comprises:
after the ballast bed is tamping, measuring whether the gap between the long point rail and the anti-jump interval iron meets the design range, if the gap exceeds the allowable tolerance, measuring the level and the height of the movable point frog, adjusting in a mechanical track lifting mode, and tamping the ballast bed by using a small-sized tamping machine.
Optionally, in any embodiment, measuring the gap between the long rail and the anti-skip interval iron in step 10 is performed at intervals of one week.
Optionally, in any embodiment, the step 10 of measuring the gap between the long rail and the anti-jump spacer iron is completed after at least three consecutive measurements meet the design specification.
Optionally, in any embodiment, the ballasting and trimming of step 10 may include the steps of:
ballasting and finishing are carried out in the first time, wherein ballasting can be carried out, and triangular pits can be eliminated;
secondly, ballasting and finishing, wherein the steps of uniform joint, square sleeper, ballasting and tamping can be carried out;
performing track shifting and square sleeper pulling;
thirdly, ballasting and track finishing are carried out, wherein track lifting, leveling, tamping and track shifting can be carried out;
and (5) adjusting and checking the turnout.
Preferably, in any embodiment, after step 11, the method further comprises:
step 12, overall rechecking of the turnout: and after the completion of the power and engineering combined fine adjustment, the whole turnout is rechecked, and the rechecked of each control item point of the turnout, the check of the fastener bolt and the rechecked work are included, so that the installation integrity is ensured.
Preferably, in any embodiment, step 11 comprises:
the switch fine tuning is carried out, so that the requirements of 2mm locking and 4mm unlocking of the switch rail and the stock rail are realized under the condition that an electric switch machine is pulled.
Optionally, in any embodiment, step 11 includes:
the positive and negative pulling time length and the close connection between the short core rail and the wing rail are adjusted, and nuts of the first two bolts of the dislocation device are loosened slowly when the close connection is poor so as to achieve a close connection state, wherein the looseness of the bolts is better than that of the four buckles.
Optionally, in any embodiment, step 11 includes:
in the process of loosening the bolts, the close contact between the long and short core rails and the dislocation situation between the long and short core rails are measured, and when the dislocation of the long and short core rails is poor, nuts of the first two bolts are further loosened, so that the dislocation quantity between the long and short core rails is ensured to be approximately in the range of 7-9 mm.
Optionally, in any embodiment, step 11 includes:
when the close contact between the long core rail and the short core rail is larger than 2mm except the tip end range, nuts of the first two bolts are properly screwed.
Preferably, in any embodiment, step 11 comprises:
the fine tuning of the turnout is carried out to realize the close contact between the long and short point rails, the close contact between the long and short point rails and the wing rails respectively, and the dislocation quantity of the long and short point rails during the pulling meets the requirements.
Optionally, in any embodiment, step 11 includes:
when the adhesion does not meet the requirement, the adjustment is performed by disassembling and assembling the adjusting sheet.
Preferably, in any embodiment, step 11 comprises:
and carrying out a pulling force test through a switch machine.
According to the embodiment of the invention, aiming at the laying of the small-number (for example, no. 7) movable point rail turnout, the movable point turnout construction method is provided, so that not only is the turnout laying precision effectively improved, but also the engineering time can be saved, the construction efficiency can be improved, and good economic and social benefits are realized.
In a preferred embodiment, a small number (e.g., number 7) movable center switch construction method is provided for use in urban rail systems, comprising the steps of:
step 1, construction preparation: collecting and auditing the turnout construction drawings, ensuring that each design drawing and related materials are complete, verifying interface specialty files, and determining the conditions of the reserved interfaces, cables, embedded pipelines and the like of the small-number movable frog and each interface specialty (such as limit specialty, signal specialty, power supply specialty, each specialty rail passing pipeline and the like) influencing subsequent construction; and checking whether the number and the type of each part of the turnout are complete. The step is different from the step 7 of fixed turnout laying in that the installation limit space of the movable point frog position switch machine needs to be verified, so that the switch machine is ensured to be installed; and (5) checking the positions of jumper holes of long and short core rails, and ensuring the installation of follow-up power supply professional cables.
Step 2, basic marking: and retesting the line according to design requirements before constructing the ballast bed, and setting control basic marks along the line according to specifications. Different from the fixed type turnout paving of No. 7, the movable point frog needs to control the paving precision for facilitating the adjustment of the movable point frog range frame, and the control basic mark is encrypted in the movable point frog range. The control base marks at the turnout are arranged along the outer side of the track, the control base marks are arranged at the positions of the front part, the rear part and the turnout center of the turnout, the control base marks are additionally arranged at the traction point and the elastic bendable center point of the track, and in addition, the encrypted (i.e. more densely arranged) control base marks are arranged at the lateral track gauge change part and the branch distance position of the turnout so as to ensure that the frame size meets the design requirement when the turnout is paved, and the control base marks of the turnout area can be shown as shown in figure 2.
Step 3, paving railway ballast: and (3) manually matching a loader to pave the bottom layer railway ballast, and layering and rolling by adopting a road roller with the pressure not less than 160kpa to ensure that the compactness of the bottom layer railway ballast is not less than 1.6g/cm < 3 >, and the flatness (which can be checked by a 3m ruler) of the railway ballast surface is not more than 10mm in all directions.
Step 4, scattered-spread switch tie: the switch tie is hoisted and placed in the direction and the number shown in the drawing by utilizing a man-machine matching mode, and the concrete steps are as follows:
(1) Before the switch tie is hoisted, the center line of the switch is controlled in a stay wire mode.
(2) And determining the position and the direction of the switch tie No. 1, and ensuring that the center line of the switch tie No. 1 is longitudinally coincident with the center line of the switch and is transversely perpendicular to the center line of the switch.
(3) And (3) outside the range of the movable point frog, taking the No. 1 switch tie as a reference, sequentially paving the switch ties according to the drawing interval, and carrying out scale drawing control on the outer sides of the bearing rail surfaces at the two ends during paving to ensure that the switch ties are parallel and perpendicular to the No. 1 switch tie so as to eliminate the accumulated error of the switch tie interval and ensure that the position deviation of the switch tie is not more than +/-3 mm.
(4) In the range of the movable point frog, taking a control base mark at the switch point as a reference, paving sleepers at two sides of the switch point, and paving the sleepers to two sides sequentially according to the sleeper design interval, wherein the position deviation of the switch sleeper in the range of the movable point frog is required to be ensured to be +/-2 mm except the sleepers at two sides of the traction point; and the intervals between the switch ties at the two sides of the traction point are strictly paved according to the drawing.
(5) And taking the No. 1 switch tie as a reference square switch tie and adjusting and matching with the switch tie spacing. The positioning of the switch tie is determined by taking the first switch tie bolt hole on the outer side of the straight strand as a reference stay wire, and the alignment of the switch tie is performed by adopting two long rulers to be placed in parallel and aligning according to the interval of the switch tie.
(6) After the switch tie is square, the control base mark is used as a base point to carry out position rechecking on the scattered switch tie, so that the laying precision of the switch tie is ensured, and the sleeper spacing in the range of the movable point frog is required to be rechecked in particular, so that the difficulty in rail piece installation and size adjustment is avoided.
Step 5, on-site assembly of the turnout: in the range of the switch, the straight stock rail is assembled with Qu Jiangui, and the curved stock rail is assembled with the straight switch rail to be respectively bound integrally; in the range of the movable point frog, firstly, assembling wing rails at two sides, wherein the assembling comprises the installation of a backing plate and a top iron; when the long and short core rails and the middle dislocation device are fixed through bolts, the whole wing rail is pushed into the center of the wing rail, and the heel end of the wing rail is connected with the long and short core rails through the spacing iron.
Step 6, hoisting and storing the turnout: and (3) carrying out field whole-group assembly at a designated place, grouping and numbering all parts of the turnout after the turnout is qualified, marking the center position of a turnout sleeper on the top surface of a turnout steel rail, and facilitating field adjustment. The components of the switch (including the straight stock rail-curved switch rail assembly, the curved stock rail-straight switch rail assembly, and the wing rail-long and short switch rail assemblies) are then maneuvered to the corresponding positions by a crane and manually dumped to the work surface. The turnout should adopt special mechanical loading and unloading, should prohibit any loading and unloading mode that produces plastic deformation when lifting, such as directly push off unloading, single point lift by crane etc. from the car, the rail of length 10-20m, the maximum value is allowed to the hoist point interval, and rail head distance nearest hoist point interval is not more than 3m.
Step 7, assembling the turnout: from the fork head, according to the principle of firstly straightening, then bending, firstly switching the device and then switching the frog, the steel rail is scattered from front to back in sequence, is shifted into the rail bearing groove, and then is connected with the rail correcting position. Installing a point rail-stock rail assembly requiring centering; when the movable point rail frog is installed, because more frog parts are needed, the movable point frog needs to be integrally translated (including the wing rails, the center rails, the parts, the fasteners, the backing plates and the like, and the disassembly is strictly forbidden), the basically centering is ensured, the direction basically meets the requirement, and the follow-up fine adjustment is convenient; when the connecting rail is paved, reserving rail joints according to 8 mm; besides the movable frog part, other positions are used for installing buckling parts and correcting and straightening according to the sequence.
Step 8, rough turnout adjustment: in the range of the switch, combining control basic marks at the switch and adjusting the basic rails of the switch according to the principle of firstly straightening the basic rails and then bending the basic rails so as to ensure the straight rail direction, the height and the horizontal postures of the switch, installing switch fasteners in sequence, measuring the rail distance and the branch distance of each part by taking the straight strand as the reference, adjusting according to the requirement, and fastening the switch fasteners according to the designed torque after adjusting in place; in the range of the movable frog, the sizes of the throat and the rim groove of the frog are detected, the combined long and short core rails are respectively and reversely pried by the crow bars, the close contact condition of the core rails and the wing rails is checked on the premise of not installing electric equipment, and if the close contact condition is not good, the heel end interval iron bolts are loosened so as to ensure that the long and short core rails are respectively close contact with the wing rails on the premise of prying by the crow bars.
Step 9, installing electrical equipment: and after the rough adjustment of the whole size of the turnout is qualified, installing an electric service point switch, wherein the electric service point switch comprises the installation of the point switch and the frog point switch and the joint rough adjustment between the electric service points.
Step 10, ballasting and finishing: and (3) carrying out the track-feeding work on the railway ballasts discharged on the two sides of the line through machines such as an excavator, trimming a railway bed (the section shapes of a pile shoulder and the like are required to meet the standard requirements), and carrying out ballasting and railway bed tamping. The ballasting and the finishing are carried out for three times successively; different from the fixed frog ballasting, the movable point frog range needs to be subjected to ballast bed tamping for a plurality of times, so that the compactness of the ballast bed is ensured, and the uneven settlement of the movable point frog caused by the non-compactness of the ballast bed is prevented. After the ballast bed is tamping, the gap between the long point rail and the anti-jump gap iron is measured at intervals of one week to determine whether the design range is met, if the design range exceeds the allowable tolerance, the level and the height of the movable point frog are required to be measured, the adjustment is carried out by adopting a mechanical track lifting mode, the ballast bed is tamping by using a small tamping machine, and after the requirement is met by three continuous measurements, the process can be stopped.
Step 11, fine tuning of the turnout and joint debugging of the power and construction: the switch machine has the advantages that the branch distance and the frame size of the switch machine part are ensured to meet the design requirements, the switch rail and the stock rail are locked by 2mm under the pulling condition of the electric switch machine, and the requirement of 4mm is not locked, and when the close fit does not meet the requirement, the switch machine is adjusted by disassembling and assembling the adjusting sheet; the frame size, the rim groove and the throat size of the movable frog part are adjusted, after the design requirement is met, the power and construction adjustment and the joint test are carried out, the positive and reverse pulling time length and the close adhesion of the short core rail and the wing rail are adjusted, when the close adhesion is found to be bad, the nuts of the first two bolts of the dislocation device are required to be loosened slowly, the repeated attempts are carried out, so that the close adhesion state is achieved, and the loosening of the bolts cannot exceed that of the four buckles; in addition, the close contact between the long and short core rails and the dislocation situation between the long and short core rails are measured in the process of loosening the bolts, when the dislocation defect of the long and short core rails is found, nuts of the first two bolts are further loosened, the dislocation quantity between the long and short core rails is ensured to be approximately in the range of 7-9 mm, when the close contact between the long and short core rails except the tip range is found to be more than 2mm, the nuts of the first two bolts are required to be properly screwed, the steps are repeated, and three standards are finally realized: the long core rail and the short core rail are closely attached, the long core rail and the short core rail are closely attached to the wing rail respectively, the dislocation quantity of the long core rail and the short core rail during pulling meets the requirement, pulling force test is carried out through a point switch, and the adjustment steps are repeated according to the test result, so that the combined fine adjustment of the power and the engineering is realized.
The movable point rail frog and the long and short point rails are provided with a dislocation device inside the long and short point rails due to large dislocation quantity, the dislocation device is specially designed for a small-number movable point rail turnout, four bolts are assembled and pre-screwed in a factory, and a front nut and a rear nut are required to be loosened properly when the movable point rail frog and the long and short point rails are in joint adjustment with signals until pulling force meets rated power of a point machine and then are re-screwed, so that the point rail pulling force and the close contact of the long and short point rails are simultaneously met.
Step 12, overall rechecking of the turnout: and after the completion of the power and engineering combined fine adjustment, the whole turnout is rechecked, and the rechecked of each control item point of the turnout, the check of the fastener bolt and the rechecked work are included, so that the installation integrity is ensured.
Fig. 1 is a flow chart of a movable point switch construction method according to an embodiment of the present invention.
In the embodiment shown in fig. 1, a method for constructing a movable point switch is seen, for use in an urban rail system, comprising:
step 1, construction preparation: checking a turnout construction drawing and related materials, determining reserved interfaces, cables and embedded pipelines at the position of a movable point frog, checking the number and the types of all parts of the turnout, checking the installation limit space of a movable point frog position switch machine, and checking the jumper hole positions of long and short point rails to ensure the installation of the cables;
step 2, basic marking: retest the route and set up the control basic mark along the route according to the norm, encrypt the control basic mark in the range of the movable frog, in order to guarantee the laying precision, arrange the control basic mark in front of fork, behind fork and position of the fork centre of the turnout along the outside of stock track, and add the control basic mark in the traction point of the core rail, flexible centre point, encrypt the control basic mark in the lateral track gauge change place of the turnout and position of the support distance;
step 3, paving railway ballast: paving the bottom layer railway ballast, and layering and rolling by adopting a road roller with the pressure not less than 160kpa to ensure that the density of the bottom layer railway ballast is not less than 1.6g/cm 3 Checking the flatness of the ballast surface to ensure that the error in each direction is not more than 10mm;
step 4, scattered-spread switch tie: hoisting and placing the switch tie according to design requirements by using a man-machine matching mode;
step 5, on-site assembly of the turnout: in the range of the switch, the straight stock rail is assembled with Qu Jiangui, and the curved stock rail is assembled with the straight switch rail; in the range of the movable point frog, firstly, assembling wing rails at two sides, wherein the assembling comprises the installation of a backing plate and a top iron; when the long and short core rails and the middle dislocation device are fixed through bolts, the whole wing rail is pushed into the center position of the wing rail, and the heel end of the wing rail is connected with the long and short core rails through a spacer iron;
step 6, hoisting and storing the turnout: marking a center position of a turnout sleeper on the top surface of a turnout steel rail so as to facilitate the positioning between the spot and the turnout sleeper, and then stably transferring the assembled straight stock rail-curved switch rail assembly, curved stock rail-straight switch rail assembly, wing rail-long and short switch rail assemblies to a working surface;
step 7, assembling the turnout: from the fork head, according to the principle of firstly straightening, then bending, firstly switching the device and then switching the frog, scattering the rails in sequence from front to back, shifting the rails into the rail bearing groove, and then connecting the rail alignment position; installing a switch rail and a stock rail assembly and centering; the movable point rail frog is arranged in a whole translation way so as to ensure that indexes between long and short point rails and wing rails are normal; paving a connecting rail, and reserving a rail seam of 8 mm; except for the movable frog, other positions are sequentially provided with buckling fittings and are aligned and straightened;
step 8, rough turnout adjustment: in the range of the switch, combining control basic marks at the switch and adjusting the basic rails of the switch according to the principle of firstly straightening the basic rails and then bending the basic rails so as to ensure the straight rail direction, the height and the horizontal postures of the switch, installing switch fasteners in sequence, measuring the rail distance and the branch distance of each part by taking the straight strand as the reference, adjusting according to the requirement, and fastening the switch fasteners according to the designed torque after adjusting in place; detecting the sizes of the throat and rim grooves in the range of the movable frog, prying the combined long and short core rails to positions and opposite positions respectively by using a pry bar, checking the natural close condition of the core rail and the wing rail on the premise of not installing electric equipment, and loosening a heel end interval iron bolt if the close condition is poor so as to ensure that the long and short core rails are close to the wing rail respectively on the premise of prying by using the pry bar;
step 9, installing electrical equipment: after the overall size rough adjustment of the turnout is qualified, installing an electric service point switch, wherein the electric service point switch comprises installation of the point switch and the frog point switch and joint rough adjustment between the electric service points;
step 10, ballasting and finishing: carrying out track feeding on the ballasts discharged on two sides of the line, trimming a track bed, and carrying out ballasting and track bed tamping, wherein the track feeding and track finishing are carried out three times; wherein the ballast tamping is performed a plurality of times within the range of the movable point frog;
step 11, fine tuning of the turnout: the turnout fine adjustment is carried out according to the requirements, the branch distance and the frame size of the switch are guaranteed to meet the design requirements, the frame size, the rim groove and the throat size of the movable frog part are adjusted to meet the design requirements, and the power and construction joint adjustment and the joint test are carried out.
The movable center turnout construction method provided by the embodiment of the invention can accurately, reliably and efficiently realize the movable center turnout installation of urban rail transit.
It is noted that relational terms such as first and second, and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the statement "comprises one" does not exclude that an additional identical element is present in a process, method, article or apparatus that comprises the element.
In the description of elements herein, a plurality of juxtaposed features connected by "and/or" is meant to encompass one or more (or one or more) of these juxtaposed features. For example, the meaning of "a first element and/or a second element" is: one or more of the first element and the second element, i.e., only the first element, or only the second element, or both the first element and the second element (both present).
The various embodiments provided in this invention may be combined with each other as desired, e.g., features of any two, three or more embodiments may be combined with each other to form new embodiments of the invention, which are also within the scope of the invention unless stated otherwise or contradicted by skill.
The foregoing description of the exemplary embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any modifications, equivalents, and variations which fall within the spirit and scope of the invention are intended to be included in the scope of the invention.
Claims (6)
1. A method of movable point switch construction for an urban rail system, comprising:
step 1, construction preparation: checking a turnout construction drawing and related materials, determining reserved interfaces, cables and embedded pipelines at the position of a movable point frog, checking the number and the types of all parts of the turnout, checking the installation limit space of a movable point frog position switch machine, and checking the jumper hole positions of long and short point rails to ensure the installation of the cables;
step 2, basic marking: retest the route and set up the control basic mark along the route according to the norm, encrypt the control basic mark in the range of the movable frog, in order to guarantee the laying precision, arrange the control basic mark in front of fork, behind fork and position of the fork centre of the turnout along the outside of stock track, and add the control basic mark in the traction point of the core rail, flexible centre point, encrypt the control basic mark in the lateral track gauge change place of the turnout and position of the support distance;
step 3, paving railway ballast: paving the bottom layer railway ballast, and layering and rolling by adopting a road roller with the pressure not less than 160kpa to ensure that the density of the bottom layer railway ballast is not less than 1.6g/cm 3 Checking the flatness of the ballast surface to ensure that the error in each direction is not more than 10mm;
step 4, scattered-spread switch tie: and the switch tie is hoisted and placed according to the design requirement by utilizing a man-machine matching mode, and the concrete steps are as follows:
(1) Before the switch tie is hoisted, the center line of the switch is controlled in a stay wire mode;
(2) Determining the position and the direction of a switch tie No. 1, and ensuring that the center line of the switch tie No. 1 is longitudinally coincident with the center line of the switch and is transversely perpendicular to the center line of the switch;
(3) Except for the range of the movable point frog, the No. 1 switch tie is used as a reference, switch tie intervals are sequentially paved, and the outside of the bearing rail surfaces at the two ends is subjected to pull rule control during paving, so that the parallel and vertical to the No. 1 switch tie is ensured, the accumulated error of the switch tie interval is eliminated, and the position deviation of the switch tie is ensured to be within +/-3 mm;
(4) In the range of the movable point frog, taking a control base mark at the frog as a reference to lay sleepers at two sides of the frog, then laying the sleepers to two sides sequentially according to the designed spacing of the sleepers, and keeping the position deviation of the sleepers at the two sides of the traction point within +/-2 mm in the range of the movable point frog;
(5) The method comprises the steps of taking a No. 1 switch tie as a reference square switch tie and matching with switch tie spacing adjustment, wherein the switch tie positioning is determined by taking a bolt hole of a first switch tie on the outer side of a straight strand as a reference stay wire, and the switch tie square is placed in parallel by two long bars and aligned according to the switch tie spacing;
(6) After the turnout sleeper is square, the control base mark is taken as a base point, the position of the scattered turnout sleeper is rechecked, the laying precision of the turnout sleeper is ensured, the rechecked sleeper spacing in the range of the movable point frog is included, and the rail piece installation and the size adjustment are prevented from being difficult;
step 5, on-site assembly of the turnout: in the range of the switch, the straight stock rail is assembled with Qu Jiangui, and the curved stock rail is assembled with the straight switch rail; in the range of the movable point frog, firstly, assembling wing rails at two sides, wherein the assembling comprises the installation of a backing plate and a top iron; when the long and short core rails and the middle dislocation device are fixed through bolts, the whole wing rail is pushed into the center position of the wing rail, and the heel end of the wing rail is connected with the long and short core rails through a spacer iron;
step 6, hoisting and storing the turnout: marking a center position of a turnout sleeper on the top surface of a turnout steel rail so as to facilitate the positioning between the spot and the turnout sleeper, and then stably transferring the assembled straight stock rail-curved switch rail assembly, curved stock rail-straight switch rail assembly, wing rail-long and short switch rail assemblies to a working surface;
step 7, assembling the turnout: from the fork head, according to the principle of firstly straightening, then bending, firstly switching the device and then switching the frog, scattering the rails in sequence from front to back, shifting the rails into the rail bearing groove, and then connecting the rail alignment position; installing a switch rail and a stock rail assembly and centering; the movable point rail frog is arranged in a whole translation way so as to ensure that indexes between long and short point rails and wing rails are normal; paving a connecting rail, and reserving a rail seam of 8 mm; except for the movable frog, other positions are sequentially provided with buckling fittings and are aligned and straightened;
step 8, rough turnout adjustment: in the range of the switch, combining control basic marks at the switch and adjusting the basic rails of the switch according to the principle of firstly straightening the basic rails and then bending the basic rails so as to ensure the straight rail direction, the height and the horizontal postures of the switch, installing switch fasteners in sequence, measuring the rail distance and the branch distance of each part by taking the straight strand as the reference, adjusting according to the requirement, and fastening the switch fasteners according to the designed torque after adjusting in place; in the range of the movable frog, detecting the sizes of the throat and rim grooves of the frog, using a crow bar to pry the combined long and short core rails to positions and opposite positions respectively, checking the close contact condition of the core rails and wing rails on the premise of not installing electric equipment, and loosening a heel end interval iron bolt if the close contact condition is poor so as to ensure that the long and short core rails are close contact with the wing rails respectively on the premise of prying by the crow bar;
step 9, installing electrical equipment: after the overall size rough adjustment of the turnout is qualified, installing an electric service point switch, wherein the electric service point switch comprises installation of the point switch and the frog point switch and joint rough adjustment between the electric service points;
step 10, ballasting and finishing: carrying out track feeding on the ballasts discharged on two sides of the line, trimming a track bed, and carrying out ballasting and track bed tamping, wherein the track feeding and track finishing are carried out three times; wherein the ballast tamping is performed a plurality of times within the range of the movable point frog;
step 11, fine tuning of the turnout: the turnout fine adjustment is carried out according to the requirements, the branch distance and the frame size of the switch are guaranteed to meet the design requirements, the frame size, the rim groove and the throat size of the movable frog part are adjusted to meet the design requirements, and the power and construction joint adjustment and the joint test are carried out.
2. The movable point switch construction method as set forth in claim 1, wherein the step 10 includes:
after the ballast bed is tamping, measuring whether the gap between the long point rail and the anti-jump interval iron meets the design range, if the gap exceeds the allowable tolerance, measuring the level and the height of the movable point frog, adjusting in a mechanical track lifting mode, and tamping the ballast bed by using a small-sized tamping machine.
3. The movable point switch construction method as set forth in claim 1, further comprising, after step 11:
step 12, overall rechecking of the turnout: and after the completion of the power and engineering combined fine adjustment, the whole turnout is rechecked, and the rechecked of each control item point of the turnout, the check of the fastener bolt and the rechecked work are included, so that the installation integrity is ensured.
4. The movable point switch construction method as set forth in claim 1, wherein the step 11 includes:
the switch fine tuning is carried out, so that the requirements of 2mm locking and 4mm unlocking of the switch rail and the stock rail are realized under the condition that an electric switch machine is pulled.
5. The movable point switch construction method as set forth in claim 1, wherein the step 11 includes:
the fine tuning of the turnout is carried out to realize the close contact between the long and short point rails, the close contact between the long and short point rails and the wing rails respectively, and the dislocation quantity of the long and short point rails during the pulling meets the requirements.
6. The movable point switch construction method as set forth in claim 1, wherein the step 11 includes:
and carrying out a pulling force test through a switch machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310785944.3A CN116657448A (en) | 2023-06-29 | 2023-06-29 | Construction method of movable point switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310785944.3A CN116657448A (en) | 2023-06-29 | 2023-06-29 | Construction method of movable point switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116657448A true CN116657448A (en) | 2023-08-29 |
Family
ID=87724171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310785944.3A Pending CN116657448A (en) | 2023-06-29 | 2023-06-29 | Construction method of movable point switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116657448A (en) |
-
2023
- 2023-06-29 CN CN202310785944.3A patent/CN116657448A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110541329A (en) | construction method of ballastless track of heavy haul railway tunnel group | |
| CN110106751B (en) | Settlement adjustment method suitable for CRTS II type plate ballastless track | |
| CN105803863A (en) | Construction method for comb-type turnout joint | |
| CN106351093A (en) | Construction method for integrally laying 1/42 turnouts in inserting mode in existing railroad section | |
| CN106948228B (en) | Quick replacement method for track plate of plate-type ballastless track | |
| CN109235292A (en) | Railroad bridge changes beam process and changes girder system system | |
| CN107059506A (en) | A kind of plate-type ballastless track track plates replacing options | |
| CN105908583B (en) | System for replacing ballast track bed of tunnel with ballastless track under condition of uninterrupted driving | |
| CN111501432A (en) | Steel truss type track structure of seamless magnetic suspension track panel and construction method thereof | |
| CN108277701A (en) | A kind of track switch and its construction method for railroad vehicle | |
| CN114481722A (en) | Method for quickly and accurately adjusting track slab of ballastless track of operating high-speed rail | |
| CN110258217A (en) | The horizontal lift beam overhead transmission line construction method of prestressing force | |
| CN117758549A (en) | Construction process of ballastless track of urban railway | |
| CN111733644A (en) | Precise adjustment method for Forskow 300-1 type fastener of high-speed railway | |
| CN116657448A (en) | Construction method of movable point switch | |
| CN111733646A (en) | WJ-7 type fastener system replacement and adjustment method for ballastless track of high-speed railway | |
| CN116590967A (en) | Method for controlling pushing connection precision of magnetic levitation turnout in overhead section | |
| CN111851155A (en) | Steel spring floating plate construction method based on concentric tunnel of line tunnel | |
| CN111473810A (en) | Track board based on distributed optical fiber monitoring | |
| CN110565453A (en) | modern tramcar 60R2 trough rail double-line three-throw combined turnout and construction method thereof | |
| CN111041909B (en) | Ballast turnout inserting and laying construction method | |
| CN111730225A (en) | Large-scale recovery air conditioner assembly installation method | |
| CN220888172U (en) | Laying bearing device for vehicle-meeting platform | |
| CN111733643A (en) | High-speed railway track precision measurement and track precision adjustment integrated construction method | |
| CN218711819U (en) | Open type ballast bed plate and ballast bed |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |