JP2016118003A - Apparatus and method for prevention of salt damage in bridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus and method for prevention of salt damage in a bridge in which a work load of salt damage measures is reduced.SOLUTION: Many discharge ports 10 are installed apart at regular intervals on lower flanges 4A, 5A at both the inside and the outside of an I-girder 5 and at the inside of an I-girder 4 of a bridge 1 easily causing salt damage. The discharge ports 10 inside the I-girder 4 are serially connected by the group of many water supply pipes 11 of a first system. The discharge port 10 of both the inside and the outside of the I-girder 5 are serially connected by the group of many water supply pipes 12, 13 of second and third systems. The first to third systems are connected in parallel to a first water supply port 20 installed in the place not interfering with the traffic of vehicles on the upper side in the vicinity of one end of the bridge 1 through a water supply pipe 21 for distribution. A pump vehicle with a water tank is connected to the first water supply port 20 to pump high-pressure washing water, and washing water is discharged around the lower flanges 4A, 5A all at once from the discharge port 10 of each system, and thereby the salt is washed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a salt damage prevention apparatus for a bridge and a salt damage prevention method for a bridge, and more particularly to a salt damage prevention apparatus and a salt damage prevention method using water.

  In roads close to the sea, railway bridges, and roads where calcium chloride for freezing prevention is distributed in snowy areas, the strength of the steel girders, beams, telescopic devices, etc. is rusted or cracked due to salt damage, resulting in deterioration in strength. There is a problem that is quick to do. Traditionally, salt damage coating has been applied to salt damage, and workers perform high-pressure washing with fresh water every 1 or 2 years, but this requires labor and time. There was a big burden.

JP 2014-148613 A

  The present invention has been made in view of the above-described problems of the prior art, and an object thereof is to provide a bridge salt damage prevention apparatus and a bridge salt damage prevention method capable of taking measures against salt damage with less work load.

In invention of Claim 1,
A number of outlets that are installed in locations where salt damage to bridges is likely to occur and discharge cleaning water;
A water supply pipe for supplying water from a water supply port provided near the bridge to each discharge port,
It is characterized by having.
In the invention of claim 2, each discharge port portion or water supply pipe is provided with a magnet for attachment to a bridge,
It is characterized by.
In the invention according to claim 3, each discharge port portion is connected in series or parallel or series-parallel with a water supply pipe,
It is characterized by.
In the invention according to claim 4, a valve for adjusting the discharge pressure is provided in each discharge port portion,
It is characterized by.
In the invention of claim 5, the angle of the discharge port of each discharge port portion is formed to be adjustable,
It is characterized by.
In the invention of claim 6, the discharge port of each discharge port portion is positioned lower than the water supply pipe,
It is characterized by.
In invention of Claim 7,
A large number of outlets that discharge water to places where salt damage to bridges is likely to occur,
Wash water is sent to each discharge port from the water supply port installed near the bridge or via the water supply pipe,
To discharge cleaning water from the outlet of each outlet to a place where salt damage to the bridge is likely to occur,
It is characterized by.

  According to the present invention, by supplying high-pressure cleaning water from a water supply port installed near a bridge or near a bridge using a pump vehicle, a water supply vehicle and a pump, a high-pressure cleaning vehicle, etc., a large number of discharges can be made through water supply pipes. Washing water can be discharged from the exit to a place where salt damage to the bridge is likely to occur, so that the salt content can be washed away.

BRIEF DESCRIPTION OF THE DRAWINGS It is the perspective view which abbreviate | omitted one part which shows the principal part of the bridge provided with the salt damage prevention apparatus of the bridge which concerns on 1st Example of this invention (Example 1). FIG. 2 is a partially broken side view showing a configuration of a discharge port portion in FIG. 1. FIG. 3 is a partially cutaway front view showing the configuration of the discharge port portion of FIG. 2.

  Hereinafter, the best mode of the present invention will be described based on examples.

An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a partially omitted perspective view showing a main part of a bridge provided with a salt damage prevention device for a bridge according to the present invention, FIG. 2 is a partially cutaway side view showing a configuration of a discharge port part in FIG. 3 is a partially broken front view showing the configuration of the discharge port portion.
In FIG. 1, reference numeral 1 denotes a road bridge near the sea, and an asphalt pavement 3 is applied on a concrete slab 2. The concrete slab 2 is supported on an abutment or a pier (not shown) through steel I girders 4 to 7. Of the I girders 4 to 7 of the bridge 1, the inside of the outer I girders 4 and 7 and the inside and outside of the inner and outer sides of the lower flanges 4A to 7A are areas where no rain hits and salt damage easily occurs. In this embodiment, along the longitudinal direction of the bridge 1 (the left-right direction in FIG. 1) on the inner side of the I girders 4 and 7 and on the inner and outer sides of the lower and lower flanges 4A to 7A on the inner and outer sides of the bridges 4B to 7B. Thus, a large number of discharge ports 10 are installed at equal intervals. The discharge port 10 inside the I girder 4 is connected in series by a group of a number of water supply pipes 11 in the first system, and the discharge port 10 on both the inner and outer sides of the I beam 5 is respectively in the second and third systems. Are connected in series by a group of a plurality of water supply pipes 12 and 13, and the discharge port portions 10 on both the inside and outside of the I girder 6 are respectively connected in series by a group of a plurality of water supply pipes 14 and 15 of the fourth and fifth systems. The discharge port 6 inside the I girder 7 is connected in series by a group of a number of water supply pipes 16 of the sixth system. The water supply pipes 11 to 16 are made of, for example, copper pipes.

  The first to third systems are connected in parallel via a first water supply port 20 and a distribution water supply pipe 21 which are installed on the upper side near one end of the bridge 1 at a place where it does not obstruct the passage of the vehicle. The fourth to fifth systems are connected in parallel via the second water supply port 22 and the distribution water supply pipe 23 installed near the other end of the bridge 1 and in a place that does not obstruct the passage of the vehicle. ing. The first and second water supply ports 20 and 22 have water supply ports facing downward so that dust does not enter.

  2 and 3 show the configuration of the first system outlet 10. In these drawings, reference numeral 30 denotes a cylindrical body, and substantially ring-shaped packings 31 and 32 are fitted on both side surfaces. A tubular body 33 projects downward from a hole (not shown) formed in the lower center of the cylindrical body 30, and a T-shaped nozzle 35 is attached to the lower end portion of the tubular body 33 via a universal joint 34. Has been. The nozzle 35 has five discharge ports 36. The inside of the cylindrical body 30 communicates with the discharge port 36 through the tube body 33, the universal joint 34, and the nozzle 35. The end portions of the water supply pipe 11 are detachably fitted into the packings 31 and 32 of the cylindrical body 30 in a sealed state. A magnet box 37 is attached to the center of the back surface of the cylindrical body 30, and a magnet 38 is attached to the magnet box 37. The magnet 38 magnetically attaches the discharge port 6 to the abdominal plate 4B of the I digit 4 and supports the discharge port 10 together with the water supply pipe 11 to the I beam 4.

A water pressure adjusting valve 39 is provided in the middle of the pipe body 33, and the discharge pressure from the nozzle 35 can be adjusted by turning the handle 40. The universal joint 34 is capable of adjusting the angle of the nozzle 35, and is in contact with the frustoconical sliding contact surface 42 formed at the lower end of the hole 41 inside the tube body 33, The ball body 44 through which the hole 43 penetrates and the outer surface of the lower end of the tube body 33 are screwed together, and a frustoconical sliding contact hole 45 formed on the bottom surface is in sliding contact with the ball body 44 in a sealed state. It consists of a nut 46. The base end portion of the nozzle 35 is screwed into the hole 43 of the ball body 44, and the angle of the nozzle 35 with respect to the tube body 33 can be adjusted. The members excluding the packings 31 and 32 of the discharge port 10 are made of metal that is resistant to salt damage.
The second to sixth discharge port portions 10 are also formed in the same manner as in FIGS. The discharge port 10 connected at the end of each system is closed by fitting a seal cover (not shown) to the end packing.

Next, the operation of the above embodiment will be described.
In addition, the angle of the nozzle 35 of each discharge port portion 10 has been adjusted in advance around the lower flange, and the pressure adjustment valve 39 has been adjusted so as to have an appropriate discharge pressure.
If you want to remove the salt by washing the inside of the I girders 4 and 7 where salt damage is likely to occur, and the lower flanges 4A to 7A on both the inner and outer sides of the I girders 5 and 6 to remove salt, Connect the pump car with a pump or a water supply truck and a pump or a high-pressure washing car, and pump the high-pressure washing water. Then, the washing water from the nozzles 35 of the multiple discharge ports 10 through the distribution pipe 21 and the pipes 11, 12, 13 of each system all around the inside of the lower flange 4 </ b> A and around both the inside and outside of the lower flange 5 </ b> A. Discharge and wash the salt (see arrows in FIGS. 2 and 3).
After washing for a sufficient amount of time, remove the pump vehicle from the first water supply port 20, and this time connect the pump vehicle with a water tank, or the water supply vehicle and pump, or the high-pressure washing vehicle to the second water supply port 22. And pump high-pressure washing water. Then, the washing water from the nozzles 35 of the multiple discharge ports 10 through the distribution pipe 23 and the pipes 14, 15 and 16 of each system all around the inside of the lower flange 7A and around both the inside and outside of the lower flange 6A. Dispense and wash out salt. When the washing is completed for a sufficient time, the pump car or the like is removed from the second water supply port 22.

According to this embodiment, the first and second water supply ports 20 and 22 installed on both ends of the bridge 1 are used to supply high-pressure washing water using a pump vehicle, a water supply vehicle and a pump, a high-pressure washing vehicle, or the like. Water is discharged from a large number of outlets 10 through the distribution pipes 21 and 23 and the water supply pipes 11 to 16 to locations where salt damage is likely to occur in the I girders 4 to 7 of the bridge 1 to wash away the salt. It is possible to remarkably reduce the burden of salt damage countermeasures.
Further, by providing the magnet 38 in the discharge port portion 10, the discharge port portion 10 and the water supply pipes 11 to 16 can be installed in a place where salt damage of the bridge 1 is likely to occur with one touch, and the construction is simple.
Further, by connecting the discharge port portions 10 of each system in series and parallel (the discharge port portions 10 of each system are connected in series with a large number of water supply pipes 11 to 16, and the first to third systems are connected by a water supply pipe 21. Even if there are a lot of I-digits in the long bridge 1, it is connected in parallel to the first water supply port 20 and the fourth to sixth systems are connected in parallel to the second water supply port 22 through the water supply pipe 23). it can.
Moreover, by providing the valve 39 for adjusting the discharge pressure at each discharge port portion 10, the amount of water washing can be adjusted individually according to the degree of salt damage at the position of each discharge port portion 10.
In addition, since the angle of the discharge port 36 of the nozzle 35 can be adjusted by the universal joint 34 of each discharge port portion 10, the washing water is directed in the direction according to the site where the salt damage easily occurs at the position of each discharge port portion 10. Can be discharged.
Further, the discharge port 36 of the nozzle 35 of each discharge port portion 10 is positioned lower than the water supply pipes 11 to 16, and the cleaning water remaining in the water supply pipes 11 to 16 after the cleaning naturally flows from the discharge port 36. Since the water is drained, the water supply system can be prevented from freezing in winter.
Moreover, since the water supply port of the 1st, 2nd water supply port parts 20 and 22 was made downward, it becomes difficult for refuse to enter into a water supply system.

  In the embodiment described above, a magnet for attachment to a bridge is provided at the discharge port, but a magnet may be provided at the water supply pipe. In addition, although the water supply port portion is provided on the upper side of the end of the bridge, it may be provided on the upper halfway of the bridge. In addition, the discharge port portion is arranged in the girder, but it may be arranged in a site where the salt damage of the bridge including one or more of the girder, the beam, and the expansion / contraction device is easily placed.

  INDUSTRIAL APPLICABILITY The present invention is applicable to places where salt damage is likely to occur, such as road bridges near railways, railway bridges, road bridges such as road bridges where calcium chloride for freezing prevention is distributed in snowy areas, etc. .

DESCRIPTION OF SYMBOLS 1 Bridge 4 thru | or 7 I girder 4A thru | or 7A Lower flange 10 Discharge port part 11 thru | or 16 Water supply pipe 20 1st water supply port part 21, 23 Distribution pipe 22 2nd water supply port part 30 Cylindrical body 31, 32 Packing 33 Tube 34 Universal joint 35 Nozzle 36 Discharge port 38 Magnet 39 Valve 40 Handle

Claims (7)

A number of outlets that are installed in locations where salt damage to bridges is likely to occur and discharge cleaning water;
A water supply pipe for supplying water from a water supply port provided near the bridge to each discharge port,
A salt damage prevention device for a bridge, characterized by comprising: Each discharge port or water pipe has a magnet for mounting on the bridge,
The apparatus for preventing salt damage of a bridge according to claim 1. Each discharge port was connected in series, parallel, or series-parallel with a water pipe,
The apparatus for preventing salt damage of a bridge according to claim 1. Provide a valve to adjust the discharge pressure at each discharge port,
The apparatus for preventing salt damage of a bridge according to claim 1. Formed so that the angle of the discharge port of each discharge port part can be adjusted,
The apparatus for preventing salt damage of a bridge according to claim 1. The discharge port of each discharge port part was positioned lower than the water supply pipe,
The apparatus for preventing salt damage of a bridge according to claim 1. A large number of outlets that discharge water to places where salt damage to bridges is likely to occur,
Wash water is sent to each discharge port from the water supply port installed near the bridge or via the water supply pipe,
To discharge cleaning water from the outlet of each outlet to a place where salt damage to the bridge is likely to occur,
A method for preventing salt damage of bridges.

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