KR100627699B1 - Method of expanding railroad bed inthe existing railway bridge and a water jet apparatus of cutting ballast protection - Google Patents

Abstract

The present invention relates to a construction method for securing the image resistance of guided tracks in an existing railway bridge, and a water jet cutting device for the same. The cleaning by a ballast cleaner is continuously performed on the land and on the existing railway bridge. This is to ensure that the work is done, and that the continuous work is performed to improve the efficiency of the ballast cleaner and to improve the longitudinal and lateral resistance of the existing railroad bridges so that the train can run safely.

Its configuration consists of first installing an alternative gravel with a height approximately equal to the cutting line and having a width of at least 2.5 m from the center of the track, and then the nozzle portion of the water jet cutting device is matched to the cutting line so that the driving pulley The gravel is cut horizontally while being moved horizontally, and then the gravel is cut vertically and blocked, and then the new gravel is replaced with an alternative gravel to resemble an induction phase so that the existing gravel does not flow down to the alternative gravel. After that, it removes the blocks of the gravel and organizes the induction phase.

Induction phase, Balllast Cleaner, Water jet cutting device, Alternative gravel, Construction surface

Description

Method of expanding railroad bed in the existing railway bridge and a water jet apparatus of cutting ballast protection

1 is a cross-sectional view showing numerically the cross-sectional width and height of an existing railway bridge (T-beam bridge).

Figure 2 is a cross-sectional view showing the working state of the ballast cleaner on the existing railway bridge of Figure 1

3a is a cross-sectional view showing a state in which a replacement gravel is installed on an existing railway bridge (T-beam bridge) and a water jet cutting device is installed on the gravel;

3B is a perspective view showing a state in which a waterjet cutting device cuts along a cutting line of a gravel wall

4 is a cross section showing a state in which the gravel is cut and the phase is installed in the alternative gravel

Fig. 5 is a sectional view showing the working state of the ballast cleaner on the drawing of Fig. 4

6 is a cross-sectional view showing a state in which a replacement gravel is installed in a reinforced concrete slab bridge that is an existing railway bridge

7 is a cross-sectional view showing a state in which a replacement gravel is installed on a PC beam composite bridge that is an existing railway bridge

The present invention relates to a construction method for securing the in-phase resistance of the induction track in the existing railway bridge, and a water jet cutting device for the same, and the mechanized equipment for removing and cleaning the bunnies of the induction track By allowing it to be applied as it is to the orbital bridge track, trains are operated safely by improving the longitudinal and transverse resistance of the road.

On induction, it is divided into roadbed and gravel bed. The interface between roadbed and gravel is called construction surface.

On gravel, sleepers and rails are installed. The mechanism by which the train load is transmitted and reduced is transmitted and decreased in the order of train load → rail → sleeper → gravel road → roadbed.

The gravel road serves as a load reduction as an intermediate medium for evenly distributing and transferring train loads. In order for the gravel to support the load coming from the top, the gravel must be firmly tightened.

On the other hand, in the railway, the base floor is called a statue, and is divided into a gravel statue and a concrete statue.

Gravel statues are pointed out as the biggest problem of environmental degradation and poor ventilation due to dust generation, whereas the ability to absorb vibrations due to high-speed driving of trains and to support heavy vehicle loads is much higher than that of concrete statues. Do.

In addition, the construction cost is cheaper than that of concrete, so it is often used for general railroad tracks.

In terms of dust generation, gravel beds are responsible for high-speed driving and heavy vehicle loads. In terms of gravel, the load of the train is supported by the friction between the gravel. To crush the gravel is to improve the tightening force between the gravel, but eventually to improve the friction between the gravel. Dust generation is inevitable due to the friction between the gravel. However, if the support of the train load is caused by the friction of the gravel, dust is the main culprit of reducing the frictional capacity. It is for this reason that gravel beds are graveled at regular intervals with a device called Balllast Cleaner. Gravel scraping is the work of sorting and removing gravel below a certain size and filling it with gravel of a certain size. Of course, this process removes dust. Dust builds up a lot on the gravel road, and the accumulated dust becomes dust when it meets rainwater. Bunny does not support the load of the train because it contains water and causes vibrations up and down.

In the winter, when the bunnies are frozen, the volume expands and the tracks rise. In severe cases, the train may derail.

When gravel soils are contaminated with bunny, they must be graveled. The criterion is the time when gravel is needed when less than 30% of fine particles less than 22mm are on gravel.

Today's repair cycles have become even faster due to the higher speeds of trains, the larger transports, and the increased number of train passes. Mechanization of maintenance work is urgently needed.

Repair work by manpower is practically impossible due to rising labor costs, difficulty in supply and demand, especially the absolute lack of repair work.

More severe than the divergence of the guided orbit is the degree of contamination on the gravel road of the existing bridge. In fact, the gravel phase of the existing railway bridge is so poor that it cannot play a role. At present, pollution levels on gravel roads are serious, and practitioners in track repair are also concerned about pollution levels. The gravel phase contamination of the existing railway bridges was 50-70%. He pointed out that Bunny was not cleaned properly. The reason why Bunny was not cleaned was analyzed as the limitation of manpower work, the structural problem of existing railway bridge, and the problem of equipment of ballast cleaner.

Due to the high speed of trains and the increase in the number of train passes, it is inevitable that mannequins are cleaned by manpower.

However, most Korean railway facilities were built before 1945.

It was time to rely on manpower. Until now, the railway bridges built at that time have been repaired and reinforced. The existing railway bridge built on the basis of manpower work is not suitable for mechanized work.

At present, Korea has mechanized the road cleaning in response to the demands of the high speed of trains and the increase of the number of train passes. I'm using a ballast cleaner.

However, it cannot be used on existing railway bridges. The reason for this is as follows.

The ballast cleaner is a device for picking up gravel over a predetermined standard as shown in FIG. 5 through a bucket, and filling the gravel with new gravel again in its position. In the process, the bunnies are cleaned. The bucket of the ballast cleaner is operated in the direction perpendicular to the track.

On the land, not the existing railway bridge, the width of the right-angle direction can afford, so that the bucket of the ballast cleaner does not interfere at all. However, the existing railway bridge is characterized by the fact that gravel is installed on both sides of the road while the width of the bridge is constructed without room.

Railroad bridges built after 1995 have no room for ballast cleaner equipment because of the wide width of the bridge.

However, existing railway bridges built before 1995 cannot be used for ballast cleaners. This is because the gravel of the existing railway bridge interferes with the bucket radius of the ballast cleaner.

From the point of view of the ballast cleaner's work, there is a problem of cleaning the land figure and stopping the cleaning just before the existing railway bridge.

It is not just a matter of stopping cleaning. After dismantling the equipment for cleaning and crossing the existing railway bridge, there is a problem of reassembly to clean the land. The time required for disassembly and assembly takes at least 30 minutes. In view of the frequent passing of high-speed trains, disassembly and assembly can cause the ballast cleaner to lose its efficiency.

In order to ensure that the ballast cleaner can be cleaned without interruption, the ballast cleaner must be upgraded for the existing railway bridge or the existing railway bridge for the ballast cleaner. At present, it is realistic to retrofit existing railroad bridges to fit ballast cleaners.

The present invention is to remove the gravel of the existing railroad bridge so as not to interfere with the bucket rotation radius of the ballast cleaner and to expand the image.

A roadbed is an intermediate vehicle that transfers the load of the train to the roadbed. In order to support the train load and transfer the load to the roadbed, at least the height h of the ship shall be 35 cm from the construction plane. It is the height calculated structurally.

Even when the gravel is removed, the minimum height of the statue must be maintained. Otherwise, the train load cannot be transmitted to the roadbed structurally and mechanically.

If so, it is absolutely important to cut the gravel to the horizontal level in the longitudinal direction to maintain the minimum height.

In addition, it is much easier to remove the gravel if it is cut into small pieces by vertically cutting the gravel cut to the horizontal level in the longitudinal direction. There is a need for a cutting device capable of cutting vertically. In addition, there should be no impact of cutting on the cutting of gravel. This is to avoid impacting the aging existing railway bridge.

As described above, the object of the present invention is to allow the ballast cleaner to be cleaned continuously on the land and on the existing railway bridge, and the continuous operation is performed to improve the efficiency of the ballast cleaner and to improve the efficiency of the existing railroad. Another purpose is to improve the longitudinal and transverse resistance of the bridge to ensure that the train runs safely. Another aim is to remove the cobblestones and expand the width of the statue while maintaining the structural dynamics of the statue.

The key to achieving the object of the present invention is the cutting of the gravel.

Cutting of gravel must meet at least three requirements.

First, the gravel wall should be cut so that the minimum height (h) of the figure is maintained. If the minimum height of the image is not maintained, the structural mechanical stability of the image is compromised. The first condition means that the gravel is cut to the horizontal level in the longitudinal direction.

Second, the impact of existing railroad bridges should not be affected by the cutting of gravel. This is because existing railway bridges are aging.

Third, the cut gravel should be blocked to a certain size.

For transporting and removing gravel walls. The third requirement is to cut the gravel in the vertical direction to block it for easy transportation and handling.

In order to satisfy the above three requirements, the most suitable as a means of cutting the gravel wall that is not impacted first will be a water jet method.

A water jet is a cutting method using energy of high pressure water injected through a nozzle. However, the water jet method is characterized in that it is easy to change the direction in the horizontal direction and the vertical direction only by changing the direction of one nozzle.

As a gravel cutting means of the present invention will be selected a water jet (water jet) method. This is because it is easy to change the direction in the horizontal direction and the vertical direction.

Referring to the configuration of a specific cutting device for such a water jet method as follows.

The configuration of the water jet cutting apparatus of the present invention will be described as a process of cutting in the longitudinal direction. (See Figures 3A and 3B)

Water jet cutting device 40 is largely composed of a nozzle fixing frame 41, the transfer support plate 45, the nozzle portion 42, and the guide roller 43. The nozzle fixing frame 41 may be formed in a pipe shape as a passage between the high pressure water A and the abrasive B. The lower end of the nozzle unit 42 and the guide roller 43 are installed in parallel to each other, the upper end of the buffer spring 46 connected to the rear of the transfer support plate 45 and the hinge support portion 47 corresponding thereto. ) Is formed, and a guide wire fixing portion 48 is formed between the buffer spring 46 and the hinge support portion 47.

A guide block 49 is formed on the front surface of the transfer support plate 45.

The high pressure water A in the waterjet cutting device 40 is given by equipment having a high pressure pump. Usually mounted on a mobile car. The abrasive B is supplied by the abrasive supply tank. High pressure water transfer equipment or abrasive feed tanks are used as is. However, in the configuration of the water jet cutting device 40, the pebble film 11 is optimized to be suitable for cutting horizontally and vertically.

The high-pressure water (A) and the abrasive (B) supplied in this way is used by connecting to the water jet cutting device 40 with a hose.

On the other hand, the fixed panel 50 is installed on the gravel 11. The guide rail 51 and the guide wire 52 are provided in parallel in the vertical direction. The guide wire 52 is rotated by the driving pulley 53 and the driven pulley 54 provided at both ends of the fixed panel 50. One end of the guide wire 52 is fixed to the guide wire fixing part 48. A guide block 49 installed on the front surface of the transfer support plate 45 is inserted into the guide rail 51.

The drive pulley 53 is driven by the motor M. As shown in FIG. The water jet cutting device 40 fixed to the guide wire 52 by the rotation of the driving pulley 53 moves in a horizontal direction, and the gravel film 11 is formed by the high pressure water A sprayed from the nozzle unit. Will be cut.

In addition, a cutting line adjustment sensor may be attached to either of the guide roller 43 and the nozzle unit 42.

Next, the relationship between the ballast cleaner 30 and the width of the existing railway bridge will be described in detail.

As shown in FIG. 2, the minimum working radius of the ballast cleaner 30 is 2.3 m.

As shown in Figure 1, the distance to the gravel 11 of the existing railway bridge is 2.1m from the center of the track. The width of the bridge does not vary. In other words, the width is almost the same whether it is in the form of a T-beam bridge (see FIG. 1), a reinforced concrete slab bridge (see FIG. 6), or a PC beam composite bridge (see FIG. 7). For the sake of convenience, the description will be made based on the T-beam bridge type.

To work with the ballast cleaner 30, the width of the existing railway bridge is 20cm or less. For smooth operation of the ballast cleaner 30 should be at least 2.5m from the center of the track. It is the technical gist of the present invention to install the replacement gravel 20 by expanding the width by at least 40 cm or more. If there is more room to install the alternative gravel 20 can be used as pedestrian walkway 24.

The structure of the replacement gravel 20 of the present invention will be described.

The structure of the replacement gravel 20 is composed of a gravel vertical plate 22, a gravel horizontal plate 21, and the support 23.

Gravel film vertical plate 22 is installed at a position at least 2.5m from the center of the gravel film is installed perpendicular to the horizontal plate 21. The gravel horizontal plate 21 is at least the same height as the cutting line or is installed at the bottom of 5-10 cm. This is because the waterjet cutting device 40 needs a height that is not obstructed by the horizontal plate 21. Conventional railway bridges, the cutting line is usually coincident with the construction surface 15.

The horizontal plate 21 is supported by the anchor bolt 26 embedded in the slab and the support 23.

The supporting portion 23 is fixed to the end of one horizontal plate 21 as an inclined member for supporting the horizontal plate 21 and the other to the beam 10 or the pier 16. It depends on the type of bridge.

In particular, in the form of reinforced concrete slab bridge as shown in Figure 6, one side of the horizontal plate 21 is combined with the slab and the anchor bolt 26, the other side is installed bracket 17 to the piers 16 and the bracket 17 The vertical member 18 was placed on it to support the horizontal plate 21.

The support 23 supporting the horizontal plate 21 can be modified according to the shape of the bridge.

This is because it is more important that the replacement gravel film and the horizontal plate supporting the vertical plate coincide with the cutting line at a position at least 2.5 m from the center of the track than the shape of the support 23.

Since the ballast cleaner 30 can be cleaned without interruption not only on the ground but also on the existing railway bridge, the height (h) of the existing railway bridge is 35 cm from the construction surface 15. It should be ideal.

However, the height (h) of the existing railway bridge is about 35cm. This is because it was the time when people designed to clean the streets.

If so, the cutting of the gravel 11 should be cut in the horizontal direction almost coincident with the construction surface 15. Accordingly, the horizontal plate 21 of the replacement gravel should also be installed at or slightly below the construction surface 15.

Now, the construction method for securing the image resistance of the guided orbit will be described.

The basic concept of the construction method of the present invention is to first install a replacement gravel 20 having a width that is at least 2.5m from the center of the track while having a height almost identical to the cutting line, and then water jet cutting device 40 After cutting the gravel 11 while moving the nozzle portion 42 of the c) to the cutting line horizontally by the drive pulley 53, the gravel 11 is cut vertically to block, and then new gravel This is a method of laying the substitute gravel 20 similar to the induction phase so that the existing gravel does not flow toward the replacement gravel 20, and then removes the block of the gravel 11 and cleans up the induction phase. .

Installing a horizontal plate 21 at a lower end of the cutting line about 5-10 cm;

Installing a gravel film vertical plate (22) at least 2.5 m from the center of the track;

Installing the fixed panel 50 on the gravel wall 11 and installing the guide rail 51 so that the nozzle portion 42 of the water jet cutting device 40 coincides with the cutting line on the vertical. ;

Installing the driving pulley 53 and the driven pulley 52 and installing the guide wire 52;

Guide block 49 of water jet cutting device 40, which consists of nozzle fixing frame 41, conveying support plate 45, nozzle part 42, and guide roller 43; Fixing one end of the guide wire 52 to the guide wire 52 of the water jet cutting device 40 while being inserted into the rail 51;

Cutting along the cutting line by the driving of the driving pulley 53 while the nozzle unit 42 sprays the high pressure water A toward the cutting line;

Cutting and blocking the gravel wall 11 at regular intervals in the vertical direction by a water jet cutting device 40 along the guide rails 51 installed in the vertical direction of the gravel wall 11;

Laying new replacement gravel in an inductive state on the installed horizontal plate 21 and vertical plate 22;

Removing the blocked gravel one by one;

It is a construction method for securing the in-phase resistance of the guided track in the existing railway bridge consisting of the step of cleaning the laid gravel.

Since the cutting line substantially coincides with the construction plane 15, the cutting line may be referred to as the construction plane 15.

The width of the replacement gravel 20 may be increased by 2.5 m or more from the center of the track to use the margin width as the pedestrian walkway 24.

The nozzle fixing frame 41 may be used as a passage between the high pressure water A and the abrasive B in a pipe shape.

The high pressure water A is injected from the nozzle portion 42 of the water jet cutting device 40, and the abrasive B is mixed in the high pressure water A.

By cutting gravel from existing railway bridges and installing replacement gravel, not only can it be cleaned by ballast cleaners, but also the efficiency of ballast cleaners can be improved by continuous cleaning of roads and bridges.

In addition, the cleaning of the bridge map improves the longitudinal and transverse resistance of the existing railway bridge, enabling safe operation of the train.

Since the water jet cutting device can be cut into horizontal cutting lines, it is a useful invention having the effect of removing the gravel wall and increasing the width of the image while maintaining the structural dynamic stability of the image.

Claims (7)

Installing a horizontal plate 21 at a lower end of the cutting line about 5-10 cm; Installing a gravel film vertical plate (22) at least 2.5 m from the center of the track; Installing the fixed panel 50 on the gravel wall 11 and installing the guide rail 51 so that the nozzle portion 42 of the water jet cutting device 40 coincides with the cutting line on the vertical. ; Installing the driving pulley 53 and the driven pulley 54 and installing the guide wire 52; Guide block 49 of water jet cutting device 40, which consists of nozzle fixing frame 41, conveying support plate 45, nozzle part 42, and guide roller 43; Fixing one end of the guide wire 52 to the guide wire 52 of the water jet cutting device 40 while being inserted into the rail 51; Cutting along the cutting line by the driving of the driving pulley 53 while the nozzle unit 42 sprays the high pressure water A toward the cutting line; Cutting and blocking the gravel wall 11 at regular intervals in the vertical direction by a water jet cutting device 40 along the guide rails 51 installed in the vertical direction of the gravel wall 11; Laying new replacement gravel in an inductive state on the installed horizontal plate 21 and vertical plate 22; Construction method for securing the image resistance of the guided track in the existing railway bridge, characterized in that it comprises the step of cleaning the laid gravel The construction method of claim 1, wherein the cutting line is a construction base surface 15 and a block of gravel blocks is lifted off one by one. The method of claim 1 or 2, comprising the step of installing the bridge sidewalk 24 by expanding the replacement gravel wall 20, the construction method for securing the image resistance of the guided track in the existing railway bridge The high pressure water (A) is injected from the nozzle portion 42 of the water jet cutting device 40, and the abrasive (B) is mixed in the high pressure water (A). Construction method to secure the image resistance of guided track in existing railway bridge In the construction for securing the in-phase resistance of the existing railway bridge track, it consists of a nozzle fixing frame 41, a conveying support plate 45, a nozzle portion 42, and a guide roller 43. Nozzle 42 and the guide roller 43 are installed in parallel to the lower end of the frame 41, the upper end of the buffer spring 46 connected to the rear of the transfer support plate 45 and the hinge support correspondingly A portion 47 is formed, and a guide wire fixing portion 48 is formed between the buffer spring 46 and the hinge support portion 47, and a guide block 49 is formed on the front surface of the transfer support plate 45. Water jet cutting device for securing the image resistance of the guided track in the existing railway bridge The method of claim 5, wherein the nozzle fixing frame 41 is a pipe-shaped water jet for securing the resistance of the induction phase track in the existing railway bridge, characterized in that the passage of the high-pressure water (A) and the abrasive (B) is formed. water jet cutting device The water jet for securing the image resistance of the guided track in an existing railway bridge, characterized in that a cutting line adjustment sensor is attached to one of the guide roller 43 and the nozzle unit 42. (water jet) cutting device

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