CN107974881B - Track lining method and screen cleaning method for railway lines on curved bridge - Google Patents

Abstract

The invention discloses a track lining method for a railway line on a curved bridge and a screening method for the railway line on the curved bridge. The track lining method of the railway line on the curved bridge comprises the following steps: and switching the railway line according to the arrangement mode and the versine of the railway line so as to enable the distance between the longitudinal center line of the span of the curved bridge and the longitudinal center line of the part of the railway line on the span to be smaller than or equal to a preset value. By utilizing the track lining method of the railway line on the curved bridge, the railway line on the curved bridge can be mechanically cleaned. Therefore, the screening efficiency and the screening quality of the railway line on the curved bridge can be greatly improved, and the safety risk of screening the railway line on the curved bridge can be greatly reduced.

Description

Track lining method and screen cleaning method for railway lines on curved bridge

Technical Field

The invention relates to the field of transportation, in particular to a track lining method of a railway line on a curved bridge and a screen cleaning method of the railway line on the curved bridge.

Background

After a railway line runs for a long time by vehicles, ballast of a track bed is mutually rubbed to generate small crushed ballast blocks and powder, and natural dust pollution, precipitation and the like are added, so that the dirt of the track bed is hardened, and slurry is turned and blown out. These diseases cause the decrease of the elasticity of the track bed, accelerate the abrasion of the steel rail and influence the passing capacity of the train.

The method is the only way to solve the problems that the bottom breaking and the screen cleaning are carried out on the line ballast bed, the standard of 'ballast particle size grading' specified in 'railway ballast crushing standards' is achieved, and the original performance of the ballast bed is recovered.

At present, railway lines on curved bridges cannot be cleaned by a screen scarifier due to the special influence of a bridge structure, and therefore the railway lines on the curved bridges can only be manually cleaned, so that the problems of low screen scarfing efficiency, poor screen scarfing quality and high safety risk exist.

Disclosure of Invention

The invention aims to overcome the problems in the prior art and provides a track lining method of a railway line on a curved bridge and a screen cleaning method of the railway line on the curved bridge.

In order to achieve the above object, a first aspect of the present invention provides a track-lining method for a railway line on a curved bridge, where the track-lining method for a railway line on a curved bridge includes the following steps: and switching the railway line according to the arrangement mode and the versine of the railway line so as to enable the distance between the longitudinal center line of the span of the curved bridge and the longitudinal center line of the part of the railway line on the span to be smaller than or equal to a preset value.

According to the track-shifting method of the railway line on the curved bridge, the railway line is shifted according to the arrangement mode and the versine of the railway line, and the distance between the longitudinal center line of the span of the curved bridge and the longitudinal center line of the part of the railway line on the span is smaller than or equal to a preset value, so that the longitudinal center line of the span and the longitudinal center line of the part of the railway line on the span can be basically overlapped.

Therefore, the width between the sleeper head and the ballast retaining wall can meet the mechanical screen cleaning operation of the screen cleaning machine, and the railway line on the curved bridge can be mechanically cleaned.

By utilizing the track lining method of the railway line on the curved bridge, the railway line on the curved bridge can be mechanically cleaned. Therefore, the screening efficiency and the screening quality of the railway line on the curved bridge can be greatly improved, and the safety risk of screening the railway line on the curved bridge can be greatly reduced.

Preferably, the normal vector is H, the span length of the curved bridge is L, the radius of the portion of the railway line on the span is R,

wherein,

preferably, when the railway line is arranged in a tangential manner, the track-lining amount of the portion of the railway line located at the end of the span is equal to the sagittal, the track-lining amount of the railway line decreases in a direction from the end of the span to the longitudinal center of the span, and preferably, the track-lining amount of the portion of the railway line located at the longitudinal center of the span is equal to zero.

Preferably, when the railway line is arranged in a bisection medium vector manner, the track-shifting amount of the part of the railway line located at the end of the span is equal to half of the positive vector, and the track-shifting amount of the part of the railway line located at the longitudinal center of the span is equal to half of the positive vector, wherein the track-shifting amount of the railway line is firstly reduced from half of the positive vector to zero along the longitudinal direction of the span from the first end of the span, then the track-shifting direction is changed, the track-shifting amount is increased from zero to half of the positive vector, then reduced from half of the positive vector to zero, and finally the track-shifting direction is changed again, the track-shifting amount is increased from zero to half of the positive vector, and then the track-shifting amount reaches the second end of the span.

Preferably, the track lining amount of the railway line is provided every preset distance along the longitudinal direction of the span, and preferably, the preset distance is 2.5 meters.

Preferably, the track-lining amount is gradually increased and decreased.

Preferably, the preset value is less than or equal to 30 mm.

Preferably, the basic track lifting amount of the railway line is more than or equal to 10 mm, and the maximum track lifting amount of the railway line is less than or equal to 60 mm.

The invention provides a method for cleaning railway lines on a curved bridge, which comprises the following steps: A) carrying out primary track lining on the railway line on the curved bridge according to the track lining method of the railway line on the curved bridge in the first aspect of the invention; B) mechanically cleaning the railway line after the primary track shifting; and C) carrying out secondary track shifting on the railway line after mechanical screening, wherein the track shifting direction of the secondary track shifting is opposite to the track shifting direction of the primary track shifting, and the track shifting amount of the secondary track shifting is equal to the track shifting amount of the primary track shifting.

The method for cleaning the railway line on the curved bridge has the advantages of high cleaning efficiency, high cleaning quality and low safety risk.

Drawings

FIG. 1 is a schematic view of a tangentially arranged railway line before and after a track switch;

fig. 2 is a schematic diagram of a railway line with bisecting median arrangement before and after lane changing.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

A track-lining method of a railway line on a curved bridge according to an embodiment of the present invention will be described with reference to fig. 1 and 2. The track lining method of the railway line on the curved bridge comprises the following steps: and (3) switching the railway line according to the arrangement mode and the versine of the railway line so as to enable the distance between the longitudinal center line of the span 100 of the curved bridge and the longitudinal center line of the part of the railway line on the span 100 to be smaller than or equal to a preset value. In other words, the distance between the longitudinal centerline of the span 100 of the curved bridge and the longitudinal centerline of the railway line on the span 100 is less than or equal to a predetermined value.

Since the span 100 of the reinforced concrete T-beam bridge (curved bridge) is straight, the longitudinal center lines of the respective beams disposed on the curve are connected (connection line) to form a broken line, which is called a bridge working line. By taking the bridge working line as a reference, the longitudinal center line of the railway line can be arranged according to a tangent line or a bisection median vector. This results in the longitudinal centerline of the railway line being offset relative to the longitudinal centerline of the span 100, i.e., the longitudinal centerline of the span 100 is not collinear with the longitudinal centerline of the railway line disposed on the span 100. Therein, span 100 may comprise two beams. The track-shifting method of the railway line on the curved bridge is used for shifting the track of one railway line.

In order to enable the width between the sleeper wood and the ballast wall to meet the mechanical screening operation of the screening machine, the longitudinal center line of the span 100 is required to be basically coincident with the longitudinal center line of the railway line arranged on the span 100. Otherwise, the existing railway line on the curved bridge cannot be mechanically cleaned by the screen cleaner. That is to say, because the longitudinal center line of curve bridge deviates relative to the longitudinal center of railway line, has occupied the clear screen space of cleaning machine, so the purpose of dialling the way is in order to give way clear screen space for cleaning machine.

According to the track-shifting method of the railway line on the curved bridge, the railway line is shifted according to the arrangement mode and the versine of the railway line, and the distance between the longitudinal center line of the span 100 of the curved bridge and the longitudinal center line of the part of the railway line on the span 100 is smaller than or equal to a preset value, so that the longitudinal center line of the span 100 and the longitudinal center line of the part of the railway line on the span 100 are basically overlapped.

Therefore, the width between the sleeper head and the ballast retaining wall can meet the mechanical screen cleaning operation of the screen cleaning machine, and the railway line on the curved bridge can be mechanically cleaned.

By utilizing the track lining method of the railway line on the curved bridge, the railway line on the curved bridge can be mechanically cleaned. Therefore, the screening efficiency and the screening quality of the railway line on the curved bridge can be greatly improved, and the safety risk of screening the railway line on the curved bridge can be greatly reduced.

Preferably, the normal vector is H, the span 100 of the curved bridge has a length L, and the radius of the portion of the railway line on the span 100 is R.

Wherein,

in one embodiment of the present invention, when the railway line is arranged in a tangential manner, the track-lining amount of the portion of the railway line located at the end of the span 100 is equal to the positive vector, and the track-lining amount of the railway line decreases in a direction from the end of the span 100 toward the longitudinal center of the span 100. The longitudinal direction of the span 100 may be the length direction of the span 100, and the longitudinal center of the span 100 is the center of the span 100 in the length direction.

As shown in fig. 1, the longitudinal centerline of the span 100 is L1, the longitudinal centerline of the railway line before track shifting is L2, and the longitudinal centerline of the railway line after track shifting is L3.

Specifically, for a railway line located on the span 100, the track-lining amount of the portion of the railway line located at the end of the span 100 is the largest and equal to the director. When the track-shifting operation is performed, the track-shifting amount of the railway line can be provided every preset distance along the longitudinal direction of the span 100. Preferably, the preset distance may be 2.5 meters.

The track switch amount of the railway line may gradually decrease in a direction from the end of the span 100 toward the longitudinal center of the span 100. Preferably, the track-taking amount of the portion of the railway line located at the longitudinal center of the span 100 may be equal to zero. That is, in the beam span, the longitudinal centerline of the railway line and the longitudinal centerline of the span 100 are substantially coincident, and the track-shifting amount of the railway line is decreased to zero. Then, the track-shifting amount of the railway line is gradually increased until the beam end is increased to the maximum value, thereby completing the track-shifting operation of the railway line over the span 100, and the track-shifting operation methods of the railway lines on the other beams are the same.

In other words, the track-shifting amount of the railway line on the span 100 decreases from H to zero and then increases from zero to H from the end of the span 100.

In another embodiment of the present invention, when the railway line is arranged in a bisecting medium vector manner, the track-shifting amount of the portion of the railway line located at the end of the span 100 is equal to half of the positive vector, and the track-shifting amount of the portion of the railway line located at the longitudinal center of the span 100 is equal to half of the positive vector. The track-shifting amount of the railway line is reduced from half of the vector to zero from the first end of the span 100 along the longitudinal direction of the span 100, then the track-shifting direction is changed, the track-shifting amount is increased from zero to half of the vector, then is reduced from half of the vector to zero, finally the track-shifting direction is changed again, the track-shifting amount is increased from zero to half of the vector, and then the track-shifting amount reaches the second end of the span 100. That is, the span 100 has a first end and a second end in its longitudinal direction.

As shown in fig. 2, the longitudinal centerline of the span 100 is L4, the longitudinal centerline of the railway line before track shifting is L5, and the longitudinal centerline of the railway line after track shifting is L6.

Specifically, for a railway line located on the span 100, the track-lining amount of the railway line located at the first end, the second end and the longitudinal center of the span 100 is the largest and equal to half of the positive vector, i.e., H/2. When the track-shifting operation is performed, the track-shifting amount of the railway line can be provided every preset distance along the longitudinal direction of the span 100. Preferably, the preset distance may be 2.5 meters.

Starting from the first end of the span 100, the track-taking amount of the railway line is gradually reduced from H/2 to zero, and the longitudinal center line of the railway line is coincided with the longitudinal center line of the span 100 for the first time. Then, the track-shifting direction is switched, and the track-shifting amount of the railway line is gradually increased from zero to H/2, and then reaches the middle of the beam span, namely the longitudinal center of the span 100. Then, the track-shifting amount of the railway line is gradually reduced to zero from H/2, and at the moment, the longitudinal center line of the railway line and the longitudinal center line of the span 100 are coincided for the second time. And finally, switching the track-shifting direction again, and gradually increasing the track-shifting amount of the railway line from zero to H/2, wherein the track-shifting amount reaches the second end of the span 100. This completes the track-shifting operation of the railway line on the span 100, and the track-shifting operation method of the railway line on the remaining beams is the same.

That is, the track-lining amount of the railway line on the span 100 varies from the end of the span 100 as follows: h/2 → 0 → -H/2 → 0 → H/2.

In one example of the present invention, the preset value is equal to or less than 30 mm. The basic track lifting amount of the railway line is more than or equal to 10 mm, and the maximum track lifting amount of the railway line is less than or equal to 60 mm. The track-shifting amount should not exceed 80 mm.

When the track shifting operation is carried out, all number positions of the tamping car are matched closely, the track shifting control is carried out in a scientific alternative mode of automatic track shifting and manual track shifting according to the line condition, next step quantity values are given after line spacing measurement, knobs such as basic track lifting quantity, front end offset, vector distance correction values and the like are adjusted in time, and whether the direction, the quantity value, the zero return performance and the like of a track lifting table, a track shifting table and a horizontal table are good or not is observed carefully, so that the expected effect of the track shifting operation is ensured.

And in the track shifting process, the tamping car operator or technician measures the track shifting result in time, feeds back information and determines the increase and decrease of the track shifting quantity value.

The invention also provides a screening method of the railway line on the curved bridge. The method for cleaning the railway line on the curved bridge comprises the following steps:

A) carrying out one-time track lining on the railway line according to the track lining method of the railway line on the curved bridge according to the embodiment of the invention;

B) mechanically cleaning the railway line after the primary track shifting; and

C) and carrying out secondary track shifting on the railway line subjected to mechanical screening, wherein the track shifting direction of the secondary track shifting is opposite to the track shifting direction of the primary track shifting, and the track shifting amount of the secondary track shifting is equal to the track shifting amount of the primary track shifting.

The method for cleaning the railway line on the curved bridge has the advantages of high cleaning efficiency, high cleaning quality, low safety risk and the like.

A curve straight-making method is adopted when the front track lining is cleaned, namely, a curve railway line on the span 100 is lined so as to realize that the longitudinal center line of the railway line is basically overlapped with the longitudinal center line of the span 100. And (3) when the railway line is restored after the screen is cleaned, adopting a track shifting method of 'returning from straight to curved', namely, shifting the straight railway line on the span 100 back to an original curve, wherein the track shifting direction is opposite to the previous track shifting direction and the theoretical quantity value is the same, and finally restoring the railway line to a standard parameter state, namely restoring tangential arrangement or bisection vector arrangement, so as to ensure good state. The method of operation is the same for each of the remaining beams.

The advantages of the invention are mainly reflected in that: the curve straight-making is adopted for the track shifting before screening, the curve returning is adopted for the track shifting of the recovered railway line after screening, and the fact data are used for accurate clamping control in the former technical investigation, the middle construction control and the later parameter correction. Practice proves that the accurate track lining ensures the state of high-quality lines, and solves the problem that the curve bridge lines cannot realize accurate track lining, thereby creating favorable space conditions for cleaning the large road maintenance machinery, and gradually refining the standardized construction process of track lining, cleaning and tamping recovery of the curve bridge lines in practice.

The first embodiment is as follows: the length of the span of the curved bridge is 32 meters, and the curve radius of the part of the railway line on the span is 600 meters. The track lining amounts of the points of the railway line arranged in the tangent and the railway line arranged in the bisection vector are shown in the table I.

Watch 1

Example two: the length of the span of the curved bridge is 24 meters, and the curve radius of the part of the railway line on the span is 500 meters. The track lining amounts of each point of the tangentially arranged railway line and the bisecting mid-vector arranged railway line are shown in the second table.

Watch two

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (7)

1. A track lining method for railway lines on a curved bridge is characterized by comprising the following steps: the railway line is shifted according to the arrangement mode and the versine of the railway line, so that the distance between the longitudinal center line of the span of the curved bridge and the longitudinal center line of the part of the railway line, which is positioned on the span, is smaller than or equal to a preset value, the versine is H, the length of the span of the curved bridge is L, and the radius of the part of the railway line, which is positioned on the span, is R,

wherein,

when the railway line is arranged in a tangent line mode, the track-shifting amount of the part of the railway line at the end of the span is equal to the positive vector, the track-shifting amount of the railway line is reduced along the direction from the end of the span to the longitudinal center of the span, when the railway line is arranged in a bisection vector mode, the track-shifting amount of the part of the railway line at the end of the span is equal to half of the positive vector, the track-shifting amount of the part of the railway line at the longitudinal center of the span is equal to half of the positive vector, wherein the track-shifting amount of the railway line is firstly reduced from half of the positive vector to zero along the longitudinal direction of the span from the first end of the span, then the track-shifting direction is changed, the track-shifting amount is increased from zero to half of the positive vector, then is reduced from half of the positive vector to zero, finally the track-shifting direction is changed again, and the track-shifting amount is increased from zero to half of the positive vector, at this point the second end of the span is reached.

2. The track-lining method for a railway line on a curved bridge according to claim 1, wherein a track-lining amount of the railway line is provided every predetermined distance apart in a longitudinal direction of a span.

3. The method for lining a railroad track on a curved bridge according to claim 1, wherein the amount of lining is gradually increased and decreased.

4. The method for switching the railway line on the curved bridge according to any one of claims 1 to 3, wherein the preset value is less than or equal to 30 mm.

5. The track lining method of the railway line on the curved bridge according to any one of claims 1 to 3, wherein the basic track lifting amount of the railway line is greater than or equal to 10 mm, and the maximum track lifting amount of the railway line is less than or equal to 60 mm.

6. The method of claim 2, wherein the predetermined distance is 2.5 meters.

7. A method for cleaning railway lines on a curved bridge is characterized by comprising the following steps:

A) performing primary track lining on the railway line on the curved bridge according to the track lining method of the railway line on the curved bridge according to any one of claims 1 to 6;

B) mechanically cleaning the railway line after the primary track shifting; and

C) and carrying out secondary track shifting on the railway line subjected to mechanical screening, wherein the track shifting direction of the secondary track shifting is opposite to the track shifting direction of the primary track shifting, and the track shifting amount of the secondary track shifting is equal to the track shifting amount of the primary track shifting.

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