CN116590967A - Method for controlling pushing connection precision of magnetic levitation turnout in overhead section - Google Patents
Method for controlling pushing connection precision of magnetic levitation turnout in overhead section Download PDFInfo
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- CN116590967A CN116590967A CN202211515060.8A CN202211515060A CN116590967A CN 116590967 A CN116590967 A CN 116590967A CN 202211515060 A CN202211515060 A CN 202211515060A CN 116590967 A CN116590967 A CN 116590967A
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- 238000005339 levitation Methods 0.000 title claims abstract description 39
- 238000010276 construction Methods 0.000 claims abstract description 48
- 238000005259 measurement Methods 0.000 claims abstract description 40
- 238000012544 monitoring process Methods 0.000 claims abstract description 30
- 238000009434 installation Methods 0.000 claims abstract description 25
- 210000001503 joint Anatomy 0.000 claims abstract description 18
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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
- E01B23/00—Easily dismountable or movable tracks, e.g. temporary railways; Details specially adapted therefor
- E01B23/02—Tracks for light railways, e.g. for field, colliery, or mine use
- E01B23/06—Switches; Portable switches; Turnouts
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D13/00—Control of linear speed; Control of angular speed; Control of acceleration or deceleration, e.g. of a prime mover
- G05D13/62—Control of linear speed; Control of angular speed; Control of acceleration or deceleration, e.g. of a prime mover characterised by the use of electric means, e.g. use of a tachometric dynamo, use of a transducer converting an electric value into a displacement
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Abstract
The application discloses a method for controlling the pushing connection precision of an overhead interval magnetic levitation turnout, which comprises the following steps: the existing line is normally operated, construction preparation is carried out, a unified measurement control network is established, and linear measurement of the existing line is carried out; obtaining a turnout installation coordinate and an elevation based on linear measurement data, completing turnout installation, and performing static adjustment and track fine adjustment on a turnout beam; the existing line is stopped, the existing line beam is positioned and the existing line track is subjected to sequential fine adjustment before the turnout Liang Lawei is pushed, and the linear monitoring and the real-time debugging of the turnout beam body are performed during pushing; based on the track butt joint error, combining a first control standard and a second control standard to regulate and control the accuracy in beam falling; acquiring an accuracy error, and carrying out line sequential connection after beam falling; the existing line resumes operation, carries out the precision control to the track of switch junction front and back section, ensures train safe operation. The method realizes one-time precision control in place, improves the construction efficiency and saves the cost investment.
Description
Technical Field
The application belongs to the technical field of civil engineering, and particularly relates to a method for controlling the pushing connection precision of a magnetic levitation turnout in an overhead section.
Background
The traditional construction method for the transverse shifting pushing connection of the railway turnout of the ballast railway comprises the following steps: the method comprises the steps of utilizing a turnout sleeper to initially assemble turnout on the side face of the turnout to be pushed, installing a transverse sliding rail, manually matching a steel cable to transversely move the turnout, positioning the turnout, measuring precision, adjusting position, positioning the turnout, retesting precision, and connecting front and rear tracks of the turnout in sequence;
the following disadvantages are mainly present:
(1) The length and the weight of the magnetic levitation turnout are large and are positioned on the turnout beam of the viaduct, and the turnout cannot be directly pushed by the transverse movement of the turnout by using the running rail.
(2) The structure of the magnetic levitation turnout is different from that of a common turnout, and the magnetic levitation turnout needs to be arranged on a turnout beam with a stable structure, so that the pushing of the magnetic levitation turnout needs to be pushed with a turnout Liang Tongbu;
(3) The push connection of the common turnout is realized only by simple assembly before push, the precision control is not needed, and the magnetic levitation turnout is required to precisely control the relative position relation between the turnout and the beam body before push so as to ensure that the turnout can be used as a control reference for line sequential connection after push;
(4) The construction precision requirement of the common turnout is not high, ballasting compensation or linear adjustment and other modes can be timely carried out after pushing to finish the connection, the magnetic levitation turnout is of a steel structure, and the connection and locking with the beam body cannot be carried out through adjustment of the beam body after the connection and locking are finished;
(5) The accuracy requirement of the magnetic levitation turnout is high, the transverse adjustment range of the magnetic levitation track is limited, and the line sequential connection difficulty is high;
(6) The magnetic levitation turnout is pushed to be positioned on the beam surface, the beam body is positioned on the temporary support system before pushing, a plurality of unstable factors exist, and the accuracy of side direction turnout installation is high in control difficulty;
(7) The line sequential connection method after pushing connection and the error range have no reference basis;
(8) The beam body pushing alignment error and the line sequential error are not in the same magnitude, and the error elimination is the core of precision control.
Disclosure of Invention
Aiming at the defects or improvement demands of the prior art, the application provides a method for controlling the pushing connection precision of the magnetic levitation turnout in the overhead section, which realizes the high-precision control of the pushing connection of the magnetic levitation turnout in the overhead section by controlling the internal precision, the whole internal precision and the alignment precision of the turnout, solves the difficult problem of the precision control of the existing line connection turnout in the overhead section, improves the construction efficiency and saves the construction investment and the cost investment; the method of the application realizes one-time precision control in place and avoids repeated adjustment of alignment.
In order to solve the problems, the application provides a method for controlling the pushing connection precision of an overhead section magnetic levitation turnout, which comprises the following steps:
the existing line is normally operated, construction preparation is carried out, a unified measurement control network is established, and linear measurement of the existing line is carried out;
obtaining a turnout installation coordinate and an elevation based on linear measurement data, completing turnout installation, and performing static adjustment and track fine adjustment on a turnout beam;
the existing line is stopped, the existing line beam is positioned and the existing line track is subjected to sequential fine adjustment before the turnout Liang Lawei is pushed, and the linear monitoring and the real-time debugging of the turnout beam body are performed during pushing;
based on the track butt joint error, combining a first control standard and a second control standard to regulate and control the accuracy in beam falling;
acquiring an accuracy error, and carrying out line sequential connection after beam falling;
the existing line resumes operation, carries out the precision control to the track of switch junction front and back section in a certain time T, ensures train safe operation.
Further, the preparing construction, establishing a unified measurement control network, completing the linear measurement of the existing line, includes:
checking construction sites, entering of materials and personnel, design standards, construction schemes and construction error indexes;
the civil engineering unit and the track or turnout construction unit take turnout connection points as centers, determine control points, establish the same measurement control network, unify network construction errors, and perform linear measurement of the existing line based on the measurement control network.
Further, the method for obtaining the switch installation coordinates and the elevation based on the linear measurement data comprises the following steps: and calculating the elevation of the supporting top surface of the basic foot of the side position turnout, the coordinates and the elevation of each control point, the offset distance of the axis of the turnout and the elevation of each section according to the linear measurement data of the existing line, and obtaining the installation coordinates and the elevation of the side position turnout.
Further, the static adjustment includes:
and checking and accepting static data of the front line position and the side line position of the turnout after the turnout is installed, performing fine tuning of the turnout, and spot welding on spot welding positions.
Further, the track fine adjustment on the turnout beam comprises:
and pouring a fixed rail on the turnout beam, and carrying out rail fine adjustment on the fixed rail on the turnout beam and the two-side connecting rails.
Further, the method is characterized in that the forward connection fine adjustment of the existing line track is carried out before pushing, and the method comprises the following steps: and fine adjustment is carried out on the large mileage end and the small mileage end connecting track of the existing line after the existing line falls down the beam, and the line shape of the existing line meets the design standard requirement.
7, the linear monitoring and real-time regulation of the turnout beam body are carried out during pushing, which comprises the following steps: the method comprises the steps of establishing detection points at two ends of the side surfaces of two tracks on a turnout beam, detecting mileage of the points, offset distance and elevation of the points and the existing line in real time, comparing the points with the linear state of the existing line, and debugging the linear state of the turnout beam body in real time in the pushing process.
Further, based on the track docking error, the accuracy control when beam falling is performed by combining the first control standard and the second control standard comprises:
if the butt joint error of the upper track of the turnout and the existing line track meets a first control standard, adjusting the existing lines at the front end and the rear end to carry out line sequential connection;
if the butt joint error of the upper track of the turnout and the existing line track meets a second control standard, the line forward connection is realized by adjusting the internal size of the turnout;
the vertical jack and the walking machine realize three-dimensional adjustment of the transverse direction, the longitudinal direction and the elevation of the beam body.
Further, the combining precision error, performing line sequential connection after beam falling, includes:
if the butt joint error meets the first type of control index, maintaining the structural size and the existing line of the turnout, and carrying out track fine adjustment and pouring on the connecting tracks on the two sides of the turnout beam to finish line connection;
if the butt joint error exceeds the first type control index and does not meet the second type control index, maintaining the structural dimension of the turnout, and carrying out track fine adjustment and pouring on the connecting tracks on the two sides of the turnout beam, wherein the existing line is used for carrying out height and left-right adjustment;
if the precision error meets the second type of control index, the structural size of the turnout is adjusted, the two sides of the turnout beam are connected with the rails to carry out fine adjustment and pouring on the rails, and the existing lines are adjusted in height and left and right.
Further, the existing line resumes operation, carries out accuracy monitoring to the track of the front and rear sections of the turnout junction point within a certain time T, ensures the safe operation of the train, and comprises:
dynamic monitoring is implemented by utilizing skylight points of existing lines and combining with a speed-up plan of a train, and the dynamic monitoring meets the following conditions:
monitoring no less than 2 times per week;
monitoring at least once after each speed increasing node;
after the train operates at normal speed, continuing to observe for 1 week, and locking a locking device at the positive line position after confirming that the train is correct, so as to lock the turnout at the positive line position; the locking device of the side line position is welded after joint debugging and joint testing;
and if the train fault condition is found in the monitoring process, performing line investigation before and after the branch area to eliminate the fault.
In general, the above technical solutions conceived by the present application, compared with the prior art, enable the following beneficial effects to be obtained:
1. according to the precision control method, the high-precision control of the pushing connection of the magnetic levitation turnout in the overhead interval is realized by controlling the internal precision, the integral internal precision and the alignment precision of the turnout, the difficult problem of the precision control of the existing line connection turnout in the overhead interval is solved, the construction efficiency is improved, and the construction investment and the cost investment are saved; the method of the application realizes one-time precision control in place and avoids repeated adjustment of alignment.
Drawings
FIG. 1 is a schematic elevation view of a switch at a junction point according to an embodiment of the present application;
FIG. 2 is a schematic plan view of a junction switch in accordance with an embodiment of the present application;
FIG. 3 is a schematic view of the internal accuracy of a planar switch in accordance with an embodiment of the present application;
FIG. 4 is a schematic view of the internal accuracy of a three-dimensional switch according to an embodiment of the present application
FIG. 5 is a schematic diagram of overall internal accuracy of an embodiment of the present application;
FIG. 6 is a schematic diagram of alignment accuracy according to an embodiment of the present application;
FIG. 7 is a flow chart of the precision control according to an embodiment of the present application;
FIG. 8 is a schematic diagram of a measurement control network setup according to an embodiment of the present application;
FIG. 9 is a schematic diagram of the casting range of the track on the switch beam (two ends are connected with the track, and the middle is a fixed track) according to the embodiment of the application;
FIG. 10 is a schematic diagram of a fine tuning interval of an existing line drop beam in an embodiment of the present application;
FIG. 11 is a schematic view of a linear monitoring plane of a process according to an embodiment of the present application;
FIG. 12 is a schematic plan view of a linear monitoring detection point in the process of the embodiment of the application;
fig. 13 is a schematic view of the line following the beam falling in the embodiment of the present application.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application. In addition, the technical features of the embodiments of the present application described below may be combined with each other as long as they do not collide with each other.
In the description of the present application, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It will be understood by those skilled in the art that all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The scheme of connecting the magnetic levitation turnout mainly comprises the steps of inserting and paving two groups of single turnout on an existing line, connecting the existing line by a straight line position, and connecting a newly-built line by a side line position, thereby realizing the sequential connection of the existing line and the newly-built line. After the existing line is stopped, the beam body, the rail, the bridge pier and other members at the junction point of the existing line are removed, a switch beam is newly built at the side, and after the switch is installed and adjusted in place, the whole switch is transversely moved to the existing line, so that the junction of the switch is realized.
The overall thought of the method precision control of the application mainly controls three types of objects, and mainly comprises the internal precision, the overall internal precision and the alignment precision of the turnout. The method comprises the following steps:
as shown in fig. 3 and 4, the internal accuracy control of the switch is dependent on the internal dimensions of the switch structure, including the relationship of switch distance, switch angle, rail gap, axis position, position of limit pins, etc.
When the side line position turnout is installed, the whole internal precision is controlled, and the accuracy of the relative position relation between the turnout structure and the turnout beam body structure is ensured. Meanwhile, the fine tuning of the turnout is required to be debugged before the turnout beam is pushed, static data is ensured to meet acceptance requirements, and the internal precision of the turnout is controlled well;
as shown in fig. 4, the overall internal accuracy depends on the relative positional relationship between the adjusted overall structure of the switch and the beam body, including the relationship between the switch foundation height, the height from the rail surface to the switch top surface, the thickness of the beam body, the coordinates of the switch foundation, and the like.
As shown in fig. 5 and 6, which are schematic diagrams of alignment accuracy control, the alignment error between the whole pushing structure of the turnout beam and the existing line and the new line, which completes the installation and debugging of the turnout, is called the butt dimension.
The linear state or the linear measurement is based on the total station to measure the deviation of the turnout beam or the track about Cheng Ji.
Mileage refers to the mileage of the railway line from the start point to the end point. The mileage value is large, namely a large mileage, and the mileage value is small, namely a small mileage.
The fine adjustment of the track disclosed by the application means that the elevation, the center line, the track gauge, the height, the track direction and the like are adjusted, so that the track meets the size requirement, and the size requirement can be determined according to a construction scheme. The construction scheme of the application is based on the design specification of the middle and low speed magnetic levitation transportation (CJJ/T262-2017), the construction standard of the urban rail transportation project (Jian Biao 104-2008), the temporary regulations of the design of the Hunan Changsha magnetic levitation transportation project (Hunan province) 2015-02-1 and the technical specifications of high-strength bolt connection of steel structures (JGJ 82), concrete structural design specifications (GB 50010-2010) and medium-low speed magnetic levitation traffic turnout system equipment (CJ/T412/2012) are determined. The track fine tuning method can be directly obtained from the prior art, and is not essential to the present application, and is not described herein.
Establishing a unified measurement monitoring network, performing linear measurement of the existing line, and determining turnout installation data based on the linear of the existing line;
installing a turnout based on turnout installation data, and checking, accepting and fine tuning;
the application provides a method for controlling the pushing connection precision of a magnetic levitation turnout in an overhead section. The application relates to a method for controlling the pushing connection precision of an overhead section magnetic levitation turnout, which comprises the following steps:
step one, normal operation of the existing line, construction preparation, establishment of a unified measurement control network and linear measurement of the existing line;
step two, obtaining turnout installation coordinates and elevation based on linear measurement data, completing turnout installation, and performing static adjustment and fine adjustment of the track on the turnout beam;
step three, stopping the existing line, positioning the existing line beam before pushing after the turnout Liang Lawei, performing sequential fine adjustment on the existing line track, and performing linear monitoring and real-time debugging on the turnout beam body during pushing;
fourth, based on the rail butt joint error, combining the first control standard and the second control standard to regulate and control the accuracy in beam falling;
step five, acquiring an accuracy error, and carrying out line sequential connection after beam falling;
and step six, recovering operation of the existing line, and monitoring the accuracy of the track at the front section and the rear section of the turnout junction point within a certain time T to ensure safe operation of the train.
The scheme provides the method for controlling the pushing connection precision of the magnetic levitation turnout in the overhead section, which can meet the construction method of connection installation precision of existing line turnouts in all overhead sections, and has the advantages of short construction period and high precision. The high-precision control of the pushing connection of the magnetic levitation turnout in the overhead interval is realized by controlling the internal precision, the integral internal precision and the alignment precision of the turnout, the difficult problem of the precision control of the existing line connection turnout in the overhead interval is solved, the construction efficiency is improved, and the construction investment and the cost investment are saved; the method of the application realizes one-time precision control in place and avoids repeated adjustment of alignment.
Based on the above embodiment, as an optional embodiment, the present application provides a method for controlling the pushing connection precision of the magnetic levitation turnout between the overhead sections, further comprising: construction preparations including, but not limited to: site checking, material and personnel entering, and determining construction procedures and construction procedure errors.
Specifically, the site condition is checked before construction to ensure compliance with the design condition. In addition, three-way and one-level operation is needed to be performed, and the work of material storage places, transport channels, water and electricity communication and the like are determined; checking the design drawing and the related error control index; checking a bill of materials and equipment before construction, and organizing the approach of related material equipment successively according to the specification and model of the bill and the approach time; the precision control is to comprehensively consider factors of various precision influences which can occur in three stages. Before the turnout is installed, various factors such as pre-camber setting of a turnout beam, upper camber of beam body stretching, lower deflection when a middle full framing is removed, shrinkage creep of the beam body, settlement of a foundation and the like are required to be considered. Aiming at various influencing factors, prevention and control measures are considered in advance, and prevention measures are formulated.
Based on the above embodiments, as an optional embodiment, the present application provides a method for controlling the pushing connection precision of an overhead section magnetic levitation turnout, where the establishing a measurement control network includes: and simultaneously establishing a measurement control network by a civil engineering unit and a track or turnout construction unit, and unifying network establishment errors.
Specifically, the control network of the civil engineering unit is the same as the control network used for installing the turnout and connecting the track, and the network construction errors are unified, namely, the civil engineering unit and the track (or the turnout construction unit) are required to be simultaneously constructed and tested before construction. By the method of the embodiment, the measuring control network can be used for controlling the shape and the structural size of the turnout in the process of constructing the turnout beam.
As shown in fig. 7, a second-class wire control network is established by CP i 00 and CP i 01 provided by the design institute centering on the switch connection point (overall internal precision schematic). The measurement control network encrypts 4 points in total, namely JM1, JM2, JM3 and JM12 respectively. JM12 is a civil construction control point for lap joint measurement. The control points of the application are determined according to the urban rail transit measurement Specification (GB/T50308-2017).
Specifically, after the net construction is completed, the measurement control net is required to measure the linear state of the existing line track, and the elevation and the position of the left and right direction of the track are determined. Mainly has the following two functions: providing initial data for the existing line beam falling, and ensuring that the existing line beam falling can be finely adjusted in place; and secondly, the reference data is used as the reference data for side track turnout installation.
Based on the above embodiment, as an optional embodiment, the present application provides a method for controlling the pushing connection precision of an overhead section magnetic levitation turnout, where the method obtains installation coordinates and elevation of a side direction turnout based on linear measurement data, and the method includes: and calculating the elevation of the supporting top surface of the basic foot of the side position turnout, the coordinates and the elevation of each control point, the offset distance of the axis of the turnout and the elevation of each section according to the data of the existing linear measurement to obtain the installation coordinates and the elevation of the side position turnout.
Specifically, the installation coordinates and data of the side direction turnout need to refer to the data after the pouring of the turnout beam of the civil engineering unit is completed, and the design data or the existing line data cannot be directly compared. And calculating the elevation of the supporting top surface of the basic foot of the side position turnout, the coordinates and the elevation of each control point, the offset distance of the axis of the turnout and the elevation of each section according to the existing linear measurement data to form a set of coordinate data. And the data is checked by project and design units and used for field implementation. The coordinate data should be matched with the positional relationship of the existing switch beam.
Specifically, the side direction turnout installation is completed according to a turnout installation scheme in a construction scheme, and the specific installation process, the installation sequence and the accuracy control standard refer to the turnout installation scheme in the construction scheme.
Making static adjustments includes: and checking and accepting static data of the positive line position and the lateral line position of the turnout after the turnout is installed, and performing turnout fine adjustment. After the fine tuning and debugging of the turnout are completed, all on-site welding parts are only subjected to spot welding, and full welding is not performed.
Specifically, 14 data required by switch acceptance criteria of the existing switch in the positive line position and in the lateral line position are collected, spot welding is performed on all on-site welding components (including a limiting device and an anti-floating device) of the switch in fine adjustment, full welding is not performed, full welding can be performed after push forward and forward connection of the switch are completed and joint adjustment and joint test are qualified, the switch acceptance criteria are not the core of the application in the prior art, and the full welding is not performed here.
And the full welding is not performed, only the spot welding is performed, part of the spot welding can be removed when the turnout is adjusted, and the turnout is re-welded, so that a larger adjustment space is provided for turnout adjustment.
As shown in fig. 9, performing fine tuning of a track on a switch beam includes: and pouring a fixed rail on the turnout beam, and carrying out rail fine adjustment on the fixed rail on the turnout beam and the two-side connecting rails.
Specifically, in order to ensure that a larger adjustment space is formed by the line sequential connection after pushing, pouring of a middle part track (a fixed track) is only performed, pouring of other part tracks (namely two-side connection tracks) on the turnout beam is not performed, only fine adjustment of the tracks is completed, adjustment amplitude of the two-side connection tracks is larger when the line sequential connection is performed, and sequential connection accuracy is higher. And (3) for the part of the track which is not poured, after pushing in place, comprehensively adjusting the line state and the alignment error, and then pouring the track bed.
As shown in FIG. 10, the construction schematic of the existing line drop beam supporting structure in the embodiment of the application is that after the shutdown, a civil engineering unit needs to be erected 23 for temporary support before removing the 2# and 4# piers, the beam ends are respectively jacked up to a certain height, 24 steel cross beams are installed after the simple beams between the 2# piers and the 3# piers and between the 3# piers and the 4# piers are removed, and then the turnout beams are transversely pushed and dropped onto the steel cross beams. The rails at the front end and the rear end (the 2# piers and the 4# piers) of the fork area are the standard for pushing and locating the existing line beams before pushing, and the rails with certain ranges of the large mileage end and the small mileage end of the existing line are subjected to sequential fine adjustment, so that the line shape of the existing line meets the design requirement, preferably, the range is not less than 50m, and the line shape of the existing line meets the design requirement of a pre-established construction scheme.
After the original beam body is removed and the supporting system is built, the turnout needs to be pushed to fall down the beam. And during pushing, linear monitoring and real-time regulation and control of the turnout beam body are carried out.
Specifically, carry out the linear control and the real-time regulation and control of switch roof beam body when pushing, include: the method comprises the steps of establishing detection points at two ends of the side surfaces of two tracks on a turnout beam, detecting mileage of the points, offset distance and elevation of the points and the existing line in real time, comparing the points with the linear state of the existing line, and debugging the linear state of the turnout beam body in real time in the pushing process.
As shown in fig. 11 and 12, in the pushing process, 4 groups of prisms are arranged at the positions of the right strand at the front end and the rear end of the two groups of turnouts, the right line is provided with A, B groups, and the left line is provided with C, D groups. And the total station is set to monitor each point in real time.
A. And (3) comparing the measured data of the group B with the measured data of the right line of the existing line, wherein the offset error is used as a basis for judging the axis deviation, the elevation error is used as a basis for judging the gradient deviation, and the measured mileage of the A, B point and the data deviation before pushing are used as a basis for judging the mileage deviation. Similarly, C, D sets of data were compared with the actual data for the left line of the existing line. The overall judgment is based on the deviation of the right line. When the deviation exceeds the preset range, the deviation of the beam body should be corrected, so that the beam body can be pushed into the position smoothly. The preset range is determined for the construction scheme of the application, and the monitoring error of the pushing process in the construction scheme comprises the following steps: longitudinal mileage error, turnout axis deviation and rail surface elevation deviation, the large mileage end of the longitudinal mileage error should not exceed +/-15 mm, and the small mileage end should not exceed +/-10 mm.
After pushing in place, the existing line track and the upper track of the turnout are butted.
Based on track butt joint error, combine first control standard and second control standard to carry out the precision regulation and control when falling the roof beam, include:
if the butt joint error of the upper track of the turnout and the existing line track meets a first control standard, adjusting the existing lines at the front end and the rear end to carry out line sequential connection; the control data for the first control standard are shown in table 1.
If the butt joint error of the upper track of the turnout and the existing line track meets a second control standard, the line forward connection is realized by adjusting the internal size of the turnout; the control data for the second control standard are shown in table 2.
The vertical jack and the walking machine realize three-dimensional adjustment of the transverse direction, the longitudinal direction and the elevation of the beam body.
TABLE 1
TABLE 2
And when the beam falls, the posture of the beam body is adjusted, and 26 vertical jacks are arranged at the 2# pier and the 4# pier, so that the leveling of the elevation is realized. The walking machine is arranged at the 3# pier, so that the transverse direction, the longitudinal direction and the elevation of the beam body can be adjusted in three dimensions. The walking machine is controlled by a computer, and can carry out linkage debugging and single-point debugging.
Line sequential connection is required after beam falling, and the specific idea is shown in fig. 13: combining the precision error condition, preferentially considering that the track fine adjustment on the turnout beam is utilized to realize the sequential connection; if the error is larger, the track on the turnout beam and the existing line track are synchronously adjusted to realize the forward connection; if the error is larger, the joint debugging of the turnout and the existing line track is considered, so that the line sequential connection is realized.
The line sequence after beam falling is carried out by combining the precision errors, and the method comprises the following steps:
if the butt joint error meets the first type of control index, maintaining the structural size and the existing line of the turnout, and carrying out track fine adjustment and pouring on the connecting tracks on the two sides of the turnout beam to finish line connection;
specifically, the first type of control index includes: axis errors, elevation errors, track gap errors are shown in table 3. Maintaining the structural size of the turnout, and carrying out progressive forward connection within the range of 25-50m in front of and behind a turnout region based on the rail surface linear precision of the turnout.
TABLE 3 Table 3
If the butt joint error exceeds the first type control index and does not meet the second type control index, maintaining the structural size of the turnout, and carrying out track fine adjustment and pouring on the connecting tracks on the two sides of the turnout beam, wherein the existing line is used for carrying out height and left-right adjustment;
specifically, the range of the butt joint error is shown in table 4, the line is connected by using two ways of track fine-tuning cast-in-place on the turnout beam and fastener adjustment of the existing line, and the existing line can be used for adjusting the height and left and right by using a height-adjusting backing plate and fastener stop pins.
TABLE 4 Table 4
And if the precision error meets the second type of control index, adjusting the structural size of the turnout, and connecting the rails on the two sides of the turnout beam to perform rail fine adjustment and pouring.
If the structural size of the turnout cannot eliminate the precision error, the whole line connection can be performed by considering the mode of combining the internal size of the turnout with the adjustment of the existing line. The principle of control is that the axis of the turnout, especially the position of the turnout center, is not required to be moved as much as possible, and other parts adopt a comprehensive connection mode in combination with the line condition.
And after the beam falls, the track bed is poured after the track on the turnout beam and the track on the newly built single-wire beam are subjected to fine adjustment to eliminate errors so as to finish the line splicing.
Based on the foregoing embodiment, as an optional embodiment, the present application provides a method for controlling the precision of pushing and connection of a magnetic levitation turnout between overhead sections, further including:
and step six, after the existing line is restored to operate, the accuracy monitoring is carried out on the track at the front section and the rear section of the turnout junction point within a certain time T, so that the safe operation of the train is ensured.
Specifically, dynamic monitoring is implemented by utilizing the skylight point of the existing line in combination with the speed-up plan of the train, and the main principle of the monitoring is as follows:
(1) Monitoring no less than 2 times per week;
(2) Each speed increasing node must be monitored once;
(3) After the train operates at normal speed, the train continues to observe for 1 week, and the switch is locked on the positive line position by the locking device which locks the positive line position after confirming that the train is correct. The locking device of the side line position is welded after joint debugging and joint testing;
(4) When conditions such as suspension detection drop point and fault reporting of the train are found in the monitoring process, the line before and after the turnout zone is required to be timely checked, the faults are timely eliminated, and the running safety of the train is ensured.
The sunroof point is a period of time reserved for maintenance and construction without arranging a train running route during running of the train. The monitoring refers to the detection of the linearity, elevation and left-right deviation of the turnout beam and the track on the turnout beam through a measurement control network.
In the present disclosure, 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 phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the application and is not intended to limit the application, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the application are intended to be included within the scope of the application.
Claims (10)
1. The method for controlling the pushing connection precision of the magnetic levitation turnout in the overhead section is characterized by comprising the following steps of:
the existing line is normally operated, construction preparation is carried out, a unified measurement control network is established, and linear measurement of the existing line is carried out;
obtaining a turnout installation coordinate and an elevation based on linear measurement data, completing turnout installation, and performing static adjustment and track fine adjustment on a turnout beam;
the existing line is stopped, the existing line beam is positioned and the existing line track is subjected to sequential fine adjustment before the turnout Liang Lawei is pushed, and the linear monitoring and the real-time debugging of the turnout beam body are performed during pushing;
based on the track butt joint error, combining a first control standard and a second control standard to regulate and control the accuracy in beam falling;
acquiring an accuracy error, and carrying out line sequential connection after beam falling;
the existing line resumes operation, carries out the precision control to the track of switch junction front and back section in a certain time T, ensures train safe operation.
2. The method for controlling the pushing connection precision of the magnetic levitation turnout in the overhead section according to claim 1, wherein the steps of preparing construction, establishing a unified measurement control network and completing the linear measurement of the existing line comprise the following steps:
checking construction sites, entering of materials and personnel, design standards, construction schemes and construction error indexes;
the civil engineering unit and the track or turnout construction unit take turnout connection points as centers, determine control points, establish the same measurement control network, unify network construction errors, and perform linear measurement of the existing line based on the measurement control network.
3. The method for controlling the pushing connection precision of the magnetic levitation turnout between the elevated sections according to claim 2, wherein the method for obtaining the installation coordinates and the elevation of the turnout based on the linear measurement data comprises the following steps: and calculating the elevation of the supporting top surface of the basic foot of the side position turnout, the coordinates and the elevation of each control point, the offset distance of the axis of the turnout and the elevation of each section according to the linear measurement data of the existing line, and obtaining the installation coordinates and the elevation of the side position turnout.
4. The method for controlling the pushing connection precision of the magnetic levitation turnout in the overhead section according to claim 1, wherein the static adjustment comprises the following steps:
and checking and accepting static data of the front line position and the side line position of the turnout after the turnout is installed, performing fine tuning of the turnout, and spot welding on spot welding positions.
5. The method for controlling the pushing connection precision of the magnetic levitation turnout between the elevated sections according to claim 1, wherein the fine adjustment of the track on the turnout beam comprises the following steps:
and pouring a fixed rail on the turnout beam, and carrying out rail fine adjustment on the fixed rail on the turnout beam and the two-side connecting rails.
6. The method for controlling the pushing connection precision of the magnetic levitation turnout between the elevated sections according to any one of claims 1 to 5, wherein the pre-pushing process of performing the sequential connection fine tuning on the existing line track comprises the following steps: and (3) fine adjustment is carried out on the track in a certain range at the large mileage end and the small mileage end of the existing line after the existing line falls down the beam, and the line shape of the existing line meets the design standard requirement.
7. The method for controlling the pushing connection precision of the magnetic levitation turnout between the elevated sections according to claim 6, wherein the method for performing linear monitoring and real-time regulation of the turnout beam body during pushing comprises the following steps: the method comprises the steps of establishing detection points at two ends of the side surfaces of two tracks on a turnout beam, detecting mileage of the points, offset distance and elevation of the points and the existing line in real time, comparing the points with the linear state of the existing line, and debugging the linear state of the turnout beam body in real time in the pushing process.
8. The method for controlling the pushing connection precision of the magnetic levitation turnout in the overhead section according to claim 7, wherein the precision control during beam falling is performed by combining a first control standard and a second control standard based on the track docking error, comprises the following steps:
if the butt joint error of the upper track of the turnout and the existing line track meets a first control standard, adjusting the existing lines at the front end and the rear end to carry out line sequential connection;
if the butt joint error of the upper track of the turnout and the existing line track meets a second control standard, the line forward connection is realized by adjusting the internal size of the turnout;
the vertical jack and the walking machine realize three-dimensional adjustment of the transverse direction, the longitudinal direction and the elevation of the beam body.
9. The method for controlling the pushing connection precision of the magnetic levitation turnout in the overhead section according to claim 5, wherein the combining precision error is used for carrying out line connection after beam falling, and the method comprises the following steps:
if the butt joint error meets the first type of control index, maintaining the structural size and the existing line of the turnout, and carrying out track fine adjustment and pouring on the connecting tracks on the two sides of the turnout beam to finish line connection;
if the butt joint error exceeds the first type control index and does not meet the second type control index, maintaining the structural dimension of the turnout, and carrying out track fine adjustment and pouring on the connecting tracks on the two sides of the turnout beam, wherein the existing line is used for carrying out height and left-right adjustment;
if the precision error meets the second type of control index, the structural size of the turnout is adjusted, the two sides of the turnout beam are connected with the rails to carry out fine adjustment and pouring on the rails, and the existing lines are adjusted in height and left and right.
10. The method for controlling the pushing connection precision of the magnetic levitation turnout between the elevated sections according to claim 9, wherein the existing line is restored to operate, the precision of the track at the front section and the rear section of the turnout connection point is monitored within a certain time T, and the safe operation of the train is ensured, comprising:
dynamic monitoring is implemented by utilizing skylight points of existing lines and combining with a speed-up plan of a train, and the dynamic monitoring meets the following conditions:
monitoring no less than 2 times per week; monitoring at least once after each speed increasing node; after the train operates at normal speed, continuously monitoring for 1 week, and locking to lock the turnout on a positive line position after confirming that the turnout is correct; the locking device of the side line position is welded after joint debugging and joint testing; and if the train fault condition is found in the monitoring process, performing line investigation before and after the branch area to eliminate the fault.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211515060.8A CN116590967A (en) | 2022-11-29 | 2022-11-29 | Method for controlling pushing connection precision of magnetic levitation turnout in overhead section |
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| CN202211515060.8A CN116590967A (en) | 2022-11-29 | 2022-11-29 | Method for controlling pushing connection precision of magnetic levitation turnout in overhead section |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114347872A (en) * | 2022-01-19 | 2022-04-15 | 济南轨道交通集团第一运营有限公司 | Auxiliary adjusting device and method for line switch core |
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2022
- 2022-11-29 CN CN202211515060.8A patent/CN116590967A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114347872A (en) * | 2022-01-19 | 2022-04-15 | 济南轨道交通集团第一运营有限公司 | Auxiliary adjusting device and method for line switch core |
| CN114347872B (en) * | 2022-01-19 | 2024-04-16 | 济南轨道交通集团第一运营有限公司 | Auxiliary adjustment device and method for line fork center |
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