JP4662233B2 - Passing wave reduction structure for fixed structures - Google Patents

Description

  The present invention relates to a passing wave reducing structure for a fixed structure that reduces a passing wave generated by mutual interference between a fixed structure in a light section other than a tunnel section and a moving body.

  When a high-speed train enters the tunnel entrance, a compression wave is generated, and this compression wave propagates through the tunnel at the speed of sound and radiates as a pulsed shock wave (tunnel micro-pressure wave) with a frequency of 20 Hz or less from the tunnel exit. The phenomenon is known. Such tunnel micro-pressure waves are radiated as shocking pressure waves around the tunnel entrance, and depending on the magnitude of the radiated pressure wave, they can be heard as a tunnel blasting sound, or through the nearby furniture and windows of houses. May cause environmental problems. For this reason, various measures are taken to reduce low-frequency pressure waves generated near the tunnel entrance. For example, a conventional tunnel shock absorber includes a cover structure (see Patent Document 1) constructed at the entrance of a tunnel and a notch formed at the door of the cover structure (see Patent Document 2). ). Such conventional tunnel buffer works reduce the tunnel micro-pressure wave radiated from the tunnel exit side when a train enters at a high speed from the tunnel entrance, and radiate from the tunnel entrance side when the train enters the tunnel entrance. Pressure waves (inrush waves) generated and pressure waves (exit waves) radiated from the tunnel exit side when the train exits the tunnel exit are reduced.

Japanese Examined Patent Publication No. 55-31274 (page 1, column 2, lines 20 to 30 and Fig. 1)

Japanese Unexamined Patent Publication No. 2000-80890 (paragraph number 0014 and FIGS. 1 to 3)

FIG. 22 is a view for explaining the concept of a structure passing wave, FIG. 22 (A) is a plan view, and FIG. 22 (B) is a side view.
A conventional tunnel buffer is constructed in the tunnel section to reduce tunnel micro-pressure waves. However, if a fixed structure 103 such as an overpass or Hashigami station is constructed close to the track in a light section other than the tunnel section, the train 101 passes through the vicinity of the fixed structure 103 at high speed. As shown in FIG. 22B, it is considered that a low-frequency pressure wave (hereinafter referred to as a structure passing wave) W such as a tunnel section is generated. For example, as shown in FIG. 22 (B), it is considered that the structure passing wave W is generated when the train 101 passes from the moving direction A at a high speed below the fixed structure 103. Such a structure passing wave W is greatly affected by the mutual shape of the train 101 and the fixed structure 103, and if the speed of the train 101 is not so high, it will not be a big problem. It is thought that it will become a big problem at near 300km / h. In recent years, trains exceeding 300 km / h have been developed, and it is necessary to consider measures for reducing such structure passing waves W.

The subject of this invention is providing the passing wave reduction structure of the fixed structure which can reduce the passing wave in light sections other than a tunnel section.

The present invention solves the above-mentioned problems by the solving means described below.
In addition, although the code | symbol corresponding to embodiment of this invention is attached | subjected and demonstrated, it is not limited to this embodiment.
As shown in FIG. 11, the invention of claim 1 is a passage generated by mutual interference between a fixed structure ( 10 ) in a light section other than a tunnel section and a train (1) traveling on a track (2a, 2b). A fixed wave passing wave reducing structure for reducing waves (W), wherein the fixed structure is rectangular when viewed from above and from the side of the track, and the train enters and The exits that exit are rectangular parallel to each other, and are substantially perpendicular to the length of the track so as to close the side and top of the train with a gap from the side and top of the train. It is a built-up overpass, Hashigami station or level crossing and these bridge piers or abutments, and occurs when the train passes under the overpass, the bridge station or the level crossing at a high speed of 300 km / h or more. A passing wave reducing unit for reducing the passing wave Comprises a 11), the passage wave reducing portion, the pier or the train inclination angle which is formed at a portion ranging to an upper portion from the lower end of both end surfaces of the rush and exit sides is inclined less than 30 ° of the abutment It is a passing wave reduction structure (4) of the fixed structure characterized by being a part.

As shown in FIG. 8, the invention of claim 2 is a passage generated by mutual interference between a fixed structure (8) in a light section other than the tunnel section and a train (1) traveling on the tracks (2a, 2b). A passing wave reducing structure for a fixed structure that reduces waves (W), wherein the fixed structure has a trapezoidal shape when viewed from the side of the track, and is spaced from a side surface of the train. to close the top and sides upper side open lateral lower side of the train, a soundproof wall is built on the side of this line, a high speed side of the sound barrier speed 300 km / h or more A passing wave reducing unit (9) for reducing the passing wave generated when the train passes, wherein the passing wave reducing unit is provided on the wall (8a) of the soundproof wall where the train enters and exits. Formed at the part from the lower end to the upper end of the end face (9a, 9b) at the start and end A fixed structure passing wave reducing structure (4) characterized in that the inclined angle is an inclined portion having an inclination angle of 30 ° or less .

As shown in FIG. 7, the invention of claim 3 reduces the passing wave of the fixed structure that reduces the passing wave generated by the mutual interference between the fixed structure in the light section other than the tunnel section and the train traveling on the track. The fixed structure has a trapezoidal shape when viewed from above the track, and opens the upper side and the upper side of the train with a gap from the side of the train. Is a soundproof wall constructed on the side of this track so as to close the road, and reduces the passing wave generated when the train passes through the side of the soundproof wall at a high speed of 300 km / h or higher. A passing wave reducing section (9) that has a starting end and a terminating end at which the train enters and leaves the upper end (8b) bent from the wall (8a) of the soundproof wall to the track side. It is formed in the part extending from the outside to the inside of the end faces (9a, 9b) Further, the present invention is a fixed structure passing wave reducing structure (4) characterized in that the inclined angle is an inclined portion of 30 ° or less .

According to the present invention, it is possible to reduce the passing wave in the light section other than the tunnel section.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a plan view of a passing wave reducing structure for a fixed structure according to a first embodiment of the present invention. FIG. 2 is a side view of the passing wave reducing structure for a fixed structure according to the first embodiment of the present invention.
The train 1 is a moving body that moves along the track 2. As shown in FIGS. 1 and 2, the train 1 is a bullet train that travels at a high speed of 300 km / h or more. The track 2 is a passage (movement route) on which the train 1 travels. As shown in FIG. 1, the track 2 is a double line composed of two main lines, and is composed of a line 2a serving as an upstream main line and a line 2b serving as a downstream main line.

  The fixed structure 3 is a building provided in a light section other than the tunnel section. The fixed structure 3 is, for example, a bridge over the track 2 to cross the track 2 or a bridge station where a station bookstore is arranged on the track 2. Here, the light section is a laying section such as a railroad track, and is a general term for a viaduct section other than a tunnel section, a ground road section, and the like. As shown in FIGS. 1 and 2, the fixed structure 3 is constructed substantially orthogonal to the track 2. The passing wave reducing structure 4 is a portion that reduces the structure passing wave W generated by the mutual interference between the fixed structure 3 in the light section other than the tunnel section and the train 1. The passing wave reducing structure 4 includes a passing wave reducing unit 5 on the side (side surface 3a of the fixed structure 3) facing the leading vehicle 1a and the trailing vehicle 1b of the train 1, respectively.

  The passing wave reducing unit 5 is a part that reduces the structure passing wave W generated when the train 1 moving in the light section passes the vicinity of the fixed structure 3. As shown in FIG. 1, the passing wave reducing unit 5 is fixed so that when the train 1 passes below the fixed structure 3, it crosses in an oblique direction with respect to the moving directions A and B of the train 1. It is formed in the structure 3. The passing wave reducing unit 5 is a triangular plate-like member having a planar shape as shown in FIGS. 1 and 2, and side surfaces 5a on the leading vehicle 1a side and the trailing vehicle 1b side are formed in a straight line. The passing wave reducing unit 5 is fixed in a state of protruding from the side surface 3a of the fixed structure 3 by a fixing member (not shown) or the like. In the first embodiment, as shown in FIG. 1, the side surface of the fixed structure 3 is such that the planar shape of the passing wave reducing unit 5 is larger on the side where the train 1 enters than on the side where the train 1 leaves. A passing wave reducing unit 5 is arranged at 3a. The angle θ shown in FIG. 1 is an inclination angle of the side surface 5a with respect to the side surface 3a. In order to reduce the structure passing wave W, it is preferable to set the angle θ large.

Next, the operation of the passing wave reducing structure for a fixed structure according to the first embodiment of the present invention will be described.
As shown in FIG. 22, when the passing wave reducing unit 5 does not exist in the fixed structure 3, when the train 101 passes through the fixed structure 103 at a high speed, it is viewed from the C direction (from the front side to the back side of the drawing). The leading vehicle 101a overlaps with the fixed structure 3 in an instant and passes through the fixed structure 3. As a result, the train 101 and the fixed structure 103 interfere with each other to generate a pulse-like structure passing wave W as shown in FIG. On the other hand, as shown in FIG. 1, when the passing wave reducing unit 5 exists in the fixed structure 3, when the train 1 approaches the fixed structure 3 while traveling on the track 2 at a high speed, from the direction C in the figure. When viewed, the leading vehicle 1 a passes below the fixed structure 3 while gradually overlapping the passing wave reducing unit 5. For this reason, the passing wave reducing unit 5 reduces the generation of the structure passing wave W due to the mutual interference between the train 1 and the fixed structure 3. Similarly, as shown in FIG. 22, when the passing wave reducing unit 5 does not exist in the fixed structure 3, the rear vehicle 101 b passes through the fixed structure 3 in an instant. A structure passing wave W is generated by mutual interference with the object 3. However, as shown in FIG. 1, when the passing wave reducing unit 5 exists in the fixed structure 3, the tail vehicle 1 b gradually passes through the passing wave reducing unit 5 when viewed from the direction C in the figure. The passing wave reducing unit 5 reduces the generation of the structure passing wave W.

The passing wave reducing structure for a fixed structure according to the first embodiment of the present invention has the following effects.
(1) In the first embodiment, the passing wave reducing unit 5 reduces the structure passing wave W generated when the train 1 moving in the light section passes near the fixed structure 3. As a result, it is possible to suppress the rattling of the furniture and windows of the house near the fixed structure 3 and to prevent environmental degradation due to low frequency noise. Further, when the passing wave reducing unit 5 is installed on the existing fixed structure 3 and the shape on the fixed structure 3 side is changed, the shape on the vehicle side is changed when a new vehicle is introduced. Thus, low frequency noise can be reduced at a low cost.

(2) In the first embodiment, when the train 1 passes under the fixed structure 3, the passing wave reducing unit 5 intersects the moving directions A and B of the train 1 in an oblique direction. As a result, the leading vehicle 1a gradually passes below the passing wave reducing unit 5 and the trailing vehicle 1b gradually passes below the passing wave reducing unit 5, so that the generation of the structure passing wave W can be suppressed. .

(3) In this 1st Embodiment, the passing wave reduction part 5 is formed in fixed structures 3, such as an overpass and a bridge station. For this reason, when a train exceeding 300 km / h is developed, the structure passing wave W is reduced by the passing wave reducing unit 5 having an inexpensive and simple structure without modifying the existing fixed structure 3 on a large scale. Can be reduced.

(Second Embodiment)
FIG. 3 is a plan view of a passing wave reducing structure for a fixed structure according to a second embodiment of the present invention. FIG. 4 is a side view of a passing wave reducing structure for a fixed structure according to a second embodiment of the present invention. In the following, the same parts as those shown in FIGS. 1 and 2 are denoted by the same reference numerals, and detailed description thereof is omitted.
The passing wave reducing unit 6 shown in FIGS. 3 and 4 is a triangular plate-like member having a planar shape as shown in FIGS. 3 and 4, and the side surfaces 6a on the leading vehicle 1a side and the trailing vehicle 1b side are linear. Is formed. As shown in FIG. 3, the passing wave reducing units 6 are respectively disposed on the side surfaces 3 a of the fixed structure 3 with the apex angles of the triangular plate members facing each other. This second embodiment has the same effect as the first embodiment.

(Third embodiment)
FIG. 5 is a plan view of a passing wave reducing structure for a fixed structure according to a third embodiment of the present invention. FIG. 6 is a side view of a passing wave reducing structure for a fixed structure according to a third embodiment of the present invention.
5 and 6 is a saw-like plate-like member having a planar shape as shown in FIGS. 5 and 6, and the side surface 7a on the leading vehicle 1a side and the trailing vehicle 1b side has a saw-tooth shape. Is formed.

(Fourth embodiment)
FIG. 7 is a plan view of a passing wave reducing structure for a fixed structure according to a fourth embodiment of the present invention. FIG. 8 is a side view of a passing wave reducing structure for a fixed structure according to a fourth embodiment of the present invention.
The fixed structure 8 shown in FIGS. 7 and 8 is a building such as a sound barrier that attenuates the intensity of sound propagating from the sound source. The fixed structure 8 is, for example, an inverted L-shaped soundproof wall that bends the upper end portion 8b of the wall portion 8a to the sound source side to confine acoustic energy to the sound source side and enhance the sound insulation effect. The passing wave reducing unit 9 is configured so that the front surfaces 9a and 9b are inclined with respect to the moving directions A and B of the train 1 when the fixed structure 8 is present on the side of the moving path (track 2) of the train 1. This fixed structure 8 is formed. The front surfaces 9a and 9b are preferably formed to have a small inclination angle and an acute angle, and preferably 30 degrees or less. As shown in FIGS. 7 and 8, the passing wave reducing portion 9 is formed on the end surfaces of the wall portion 8a and the upper end portion 8b at the start and end of the fixed structure 8 (surfaces facing the leading vehicle 1a and the trailing vehicle 1b). Has been. For example, when the fixed structure 8 is longer than the train 1 and the train 1 approaches the fixed structure 8 at a high speed as shown in FIG. The rear vehicle 1b enters the side of the fixed structure 8 while gradually overlapping with the passing wave reducing unit 9 while gradually overlapping. For this reason, the passing wave reducing unit 9 reduces the generation of the structure passing wave W due to the mutual interference between the train 1 and the fixed structure 8. Similarly, when the train 1 leaves the fixed structure 8 at a high speed, the leading vehicle 1a gradually exits the passing wave reducing unit 9, and then the trailing vehicle 1b gradually exits the passing wave reducing unit 9. The passing wave reducing unit 9 reduces the generation of the structure passing wave W. The fourth embodiment has the same effects as the first to third embodiments.

(Fifth embodiment)
FIG. 9 is a plan view of a passing wave reducing structure for a fixed structure according to a fifth embodiment of the present invention, and FIGS. 9A and 9B are examples in which the side surface of the passing wave reducing portion is formed in a concave curve. 9 (C) and 9 (D) are examples in which the side surface of the passing wave reducing unit is formed into a convex curve, and FIGS. 9 (E) and 9 (F) are the side surfaces of the passing wave reducing unit formed in a sawtooth shape. FIGS. 9G and 9H are examples in which the side surface of the passing wave reducing portion is formed in an uneven curve.
The passing wave reducing units 5 and 6 shown in FIG. 9 change the plane shape by forming the side surfaces 5a and 6a shown in FIG. 1 and FIG. 3 into concave curves, convex curves, sawtooth waves or uneven curves. ing. The fifth embodiment has the same effects as those of the first to third embodiments.

(Sixth embodiment)
FIG. 10 is a side view of a passing wave reducing structure for a fixed structure according to a sixth embodiment of the present invention, and FIG. 10 (A) is an example in which the front surface of the passing wave reducing portion is formed in a concave curve, FIG. 10B is an example in which the front surface of the passing wave reducing unit is formed in a convex curve, and FIG. 10C is an example in which the front surface of the passing wave reducing unit is formed in a sawtooth shape. In FIG. 10, the front surface 9b shown in FIG. 7 is not shown.
The passing wave reducing unit 9 shown in FIG. 10 has a front surface 9a, 9b shown in FIGS. 7 and 8 formed in a concave curve, a convex curve or a sawtooth shape, and the cross-sectional area is changed. The sixth embodiment has the same effect as that of the fourth embodiment.

(Seventh embodiment)
FIG. 11 is a perspective view of a passing wave reducing structure for a fixed structure according to a seventh embodiment of the present invention. A fixed structure 10 shown in FIG. 11 is a building such as an overpass or a bridge pier or a pedestal of a bridge station. The passing wave reducing unit 11 is fixed so that the front surface 11a is inclined with respect to the moving directions A and B of the train 1 when the fixed structure 10 is located on the side of the moving route (track 2) of the train 1. It is formed in the structure 10. The passing wave reducing unit 11 is formed on both end surfaces of the fixed structure 10 (surfaces facing the leading vehicle 1a and the trailing vehicle 1b). The seventh embodiment has the same effects as the fourth embodiment and the sixth embodiment.

Next, examples of the present invention will be described.
FIG. 12 is a plan view of a traveling experiment apparatus used for confirming the effect of the structure for reducing the passing wave of the fixed structure according to the embodiment of the present invention.
A traveling experimental apparatus 20 shown in FIG. 12 is an apparatus that measures a passing wave generated by mutual interference between the structure model 21 and the train model 22. As shown in FIG. 12, the running test apparatus 20 is a train model between a structure model 21 that simulates an actual overpass, a train model 22 that simulates an actual Shinkansen train, and a rotating body 23a and a rotating body 23b. A launching device 23 that launches the vehicle while accelerating the vehicle, a guide wire 24 that guides the train model 22 launched from the launching device 23, a braking device 25 that brakes the train model 22 that has passed through the structural model 21, and a structural model. 21 includes a speed sensor S that detects the speed of the train model 22 passing through 21 and microphones M _{1 to} M ₄ that detect a structure passing wave generated when the train model passes through the structure model 21.

A center line C ₁ shown in FIG. 12 is a straight line passing through the center of the structure model 21 and parallel to the guide line 24, and the center line C ₂ is perpendicular to the center line C ₁ and is centered on the structure model 21. A straight line passing through. Microphone M ₁ is the structure from the center line C ₁ of the model 21 a distance L ₁ = 400 mm is disposed on a distant center line C _2, microphones M ₂ microphones M ₁ from the center line C ₁ of the structure model 21 Is arranged on the center line C _{2 at} a distance L ₁ = 400 mm away from the opposite side. The microphone M ₃ is located at a distance L ₁ = 400 mm from the center line C ₁ of the structure model 21 to the microphone M ₂ side, and is a distance L from the center line C ₂ of the structure model 21 to the launcher 23 side. ₂ = disposed at 231mm away. The microphone M ₄ is located at a distance L ₁ = 400 mm from the center line C ₁ of the structure model 21 to the microphone M ₂ side, and is a distance L from the center line C ₂ of the structure model 21 to the braking device 25 side. ₂ = disposed at 231mm away. Guide wire 24, since the center line C ₁ is arranged parallel to the eccentric amount delta = 17 mm away and the central line C ₁ in the microphone M ₂ ~M ₄ side, the train model 22 from the center line C ₁ Pass through a slightly offset position.

(Conventional example)
FIG. 13 is a perspective view of a structure model according to a conventional example. FIG. 14 is a graph showing a pressure waveform when a train model passes through a structure model according to a conventional example.
A structure model 21 shown in FIG. 13 is a model simulating the conventional fixed structure 103 shown in FIG. 22, and has a width W = 47.2 mm, a length L = 92.9 mm, and a height H = 103.9 mm. The train model 22 is a model simulating a 300 series Shinkansen. The structure model 21 and the train model 22 are formed so that an actual structure or vehicle is scaled so that the external shape is vertically symmetric. The graph shown in FIG. 14 is a measurement result of detecting the structure passing wave generated when the train model 22 is passed at 400 km / h by the microphone M ₂ shown in FIG. The vertical axis shown in FIG. 14 is pressure (Pa), and the horizontal axis is time (ms). As shown in FIG. 14, in 45 to 50 ms when the head vehicle of the train model 22 passes through the structure model 21, the positive pressure peak value reaches about 13 Pa, and the negative pressure peak value is about -17 Pa. Has reached. Further, in 55 to 60 ms when the rear vehicle of the train model 22 passes through the structure model 21, the peak value of the positive pressure reaches about 10 Pa, and the peak value of the negative pressure reaches about -8 Pa. As a result, it was confirmed that when a train traveling at a high speed like the Shinkansen passes through a fixed structure, a structure passing wave is generated.

Example 1
FIG. 15 is a perspective view of a structural model provided with a passing wave reducing structure according to Embodiment 1 of the present invention. FIG. 16: is a graph which shows a pressure waveform when a train model passes the structure model provided with the passing wave reduction structure which concerns on Example 1 of this invention.
A structure model 21 shown in FIG. 15 is a model simulating the fixed structure 10 shown in FIG. 11, and this structure model 21 is on the side close to the train model 22 (left side as viewed from the train model 22 side). An inclined plate having an inclination angle θ = 30 ° is installed on the side where the train model 22 enters and the side where the train model 22 exits. The graph shown in FIG. 16 is a measurement result in which a structure passing wave generated when passing through a train model 22 simulating a 300 series Shinkansen at 400 km / h is detected by the microphone M ₂ as in the conventional example. As shown in FIG. 16, the peak value of the positive pressure when the train model 22 passes through the leading vehicle is about 6 Pa, which is about 7 Pa lower than the conventional example, and the peak value of the negative pressure is about 6 Pa. -14Pa, which is about 3Pa lower than the conventional example. Moreover, the peak value of the pressure on the plus side when passing the rear vehicle of the train model 22 is about 9 Pa, which is about 1 Pa lower than the conventional example, and the peak value of the pressure on the minus side is about -6 Pa. Compared to the conventional example, it is reduced by about 2 Pa. As a result, when a train that travels at high speed like the Shinkansen passes through a fixed structure, it is structured by installing a wall with inclined surfaces on one side when the train enters and exits on one side as seen from the train It was confirmed that the object passing wave can be reduced. For example, if there is a residential area on the left side when viewed from the train and there is no residential area on the right side when viewed from the train, by installing a wall portion having an inclined surface only on the left side when viewed from the train, The influence by the structure passing wave can be reduced.

(Example 2)
FIG. 17 is a perspective view of a structural model including a passing wave reducing structure according to Embodiment 2 of the present invention. FIG. 18 is a graph showing a pressure waveform when a train model passes through a structural model having a passing wave reducing structure according to Embodiment 2 of the present invention.
A structure model 21 shown in FIG. 17 is a model simulating the fixed structure 10 shown in FIG. 11 as in the first embodiment, and the structure model 21 is on both the left and right sides as viewed from the train model 22 side. An inclined plate with an inclination angle θ = 30 ° is installed on the side where the train model 22 enters and the side where the train model 22 exits. The graph shown in FIG. 18 is a measurement in which a structure passing wave generated when passing through a train model 22 simulating a 300 series Shinkansen at 400.9 km / h is detected by the microphone M ₂ as in the conventional example and the first embodiment. It is a result. As shown in FIG. 18, the peak value of the pressure on the plus side when passing through the leading vehicle of the train model 22 is about 4 Pa, which is about 9 Pa compared to the conventional example and about 2 Pa compared to the first example, The peak value of the negative pressure is about -14 Pa as in the first embodiment, which is about 3 Pa lower than the conventional example. In addition, the peak value of the pressure on the plus side when passing the rear vehicle of the train model 22 is about 8 Pa, which is about 2 Pa compared to the conventional example and about 1 Pa compared to the first example. The peak value is about −6 Pa as in Example 1, which is about 2 Pa lower than the conventional example. As a result, when a train that travels at high speed like the Shinkansen passes through a fixed structure, it is possible to most effectively reduce the wave passing through the structure by installing walls with inclined surfaces on both the left and right sides when viewed from the train. It was confirmed that.

(Example 3)
FIG. 19 is a graph showing a pressure waveform when a train model passes through a structural model having a passing wave reducing structure according to Embodiment 3 of the present invention.
The graph shown in FIG. 19 occurs when the inclined plate of Example 2 shown in FIG. 17 is set at an inclination angle θ = 45 ° and a train model 22 simulating a 300 series Shinkansen is passed at 400.9 km / h. the structure passing waves to the measurement results detected by the microphone M _2. As a result, the peak value of pressure is increased as compared with Example 2.

(Example 4)
FIG. 20 is a graph showing a pressure waveform when a train model passes through a structural model including a passing wave reducing structure according to Embodiment 4 of the present invention.
The graph shown in FIG. 20 is generated when the inclined plate of Example 2 shown in FIG. 17 is set at an inclination angle θ = 60 ° and the train model 22 simulating the 300 series Shinkansen is passed at 400 km / h. the structure passing wave measurement results detected by the microphone M _2. As a result, the peak value of pressure is increased as compared with Example 2. According to the measurement results of the microphone M ₂ of Examples 3 and 4, it was confirmed that the effect of reducing the wave passing through the structure is lowered when the inclined plate is set to an angle exceeding the inclination angle θ = 30 °.

(Example 5)
FIG. 21 is a graph showing a pressure waveform when a train model of a different type passes through a structure model including a passing wave reducing structure according to Embodiment 2 of the present invention.
In the graph shown in FIG. 21, a structure passing wave generated when the train model 22 simulating the 500 series Shinkansen is passed through the structure model 21 shown in FIG. 17 at 350.2 km / h is detected by the microphone M ₂ . It is a measurement result. As a result, it was confirmed that the wave passing through the structure can be reduced even for the 500 series Shinkansen, which has a different vehicle shape from the 300 series Shinkansen.

(Other embodiments)
The present invention is not limited to the embodiment described above, and various modifications or changes can be made as described below, and these are also within the scope of the present invention.
(1) In this embodiment, the train (railway vehicle) 1 has been described as an example of the moving body, but the present invention is not limited to this. For example, the present invention can be applied to a moving body such as a magnetic levitation railway or an automobile that travels at a high speed. In this embodiment, the fixed structure 3 has been described by taking an overpass or a bridge station as an example, but the present invention can also be applied to a fixed structure such as a road intersection. Furthermore, in this embodiment, the inverted L-type soundproof wall has been described as an example of the fixed structure 8, but the present invention can also be applied to a soundproof wall or a building constructed on the side of the track.

(2) Although this embodiment has been described by taking a double track section as an example, the present invention can also be applied to a single track section. Further, in this embodiment, the case where the side surfaces 5a, 6a, 7a and the front surface 9a are formed in a sawtooth shape has been described as an example, but other waveforms such as a sine wave may be formed. Furthermore, in this embodiment, as shown in FIG. 1, the case where the planar shape of the passing wave reducing unit 5 increases from the line 2b toward the line 2a has been described as an example, but the direction from the line 2a toward the line 2b is described. The planar shape of the passing wave reducing unit 5 may be increased.

(3) In this embodiment, as shown in FIG. 3, the case where the planar shape of the passing wave reducing unit 6 increases from the center of the track 2 toward the outside of the lines 2a and 2b has been described as an example. You may increase the planar shape of the passing wave reduction part 6 toward the center of the track | orbit 2 from the outer side of track | line 2a, 2b.

It is a top view which shows the passing wave reduction structure of the fixed structure which concerns on 1st Embodiment of this invention. It is a side view which shows the passing wave reduction structure of the fixed structure which concerns on 1st Embodiment of this invention. It is a top view which shows the passing wave reduction structure of the fixed structure which concerns on 2nd Embodiment of this invention. It is a side view which shows the passing wave reduction structure of the fixed structure which concerns on 2nd Embodiment of this invention. It is a top view which shows the passing wave reduction structure of the fixed structure which concerns on 3rd Embodiment of this invention. It is a side view which shows the passing wave reduction structure of the fixed structure which concerns on 3rd Embodiment of this invention. It is a top view which shows the passing wave reduction structure of the fixed structure which concerns on 4th Embodiment of this invention. It is a side view which shows the passing wave reduction structure of the fixed structure which concerns on 4th Embodiment of this invention. It is a top view which shows the passing wave reduction structure of the fixed structure which concerns on 5th Embodiment of this invention, (A) (B) is the example which formed the side surface of the passing wave reduction part in the concave curve, (C (D) is an example in which the side surface of the passing wave reducing unit is formed into a convex curve, and (E) and (F) are examples in which the side surface of the passing wave reducing unit is formed in a sawtooth shape, and (G) ( H) is an example in which the side surface of the passing wave reducing portion is formed into an uneven curve. It is a side view which shows the passing wave reduction structure of the fixed structure which concerns on 6th Embodiment of this invention, (A) is an example which formed the front surface of the passing wave reduction part in the concave curve, (B) is passing. This is an example in which the front surface of the wave reduction unit is formed in a convex curve, and (C) is an example in which the front surface of the passing wave reduction unit is formed in a sawtooth shape. It is a perspective view which shows the passing wave reduction structure of the fixed structure which concerns on 7th Embodiment of this invention. It is a top view of the driving | running | working test apparatus used in order to confirm the effect of the passing wave reduction structure of the fixed structure based on the Example of this invention. It is a perspective view of the structure model which concerns on a prior art example. It is a graph which shows a pressure waveform when a train model passes the structure model concerning a conventional example. It is a perspective view of a structure model provided with the passing wave reduction structure concerning Example 1 of this invention. It is a graph which shows a pressure waveform when a train model passes the structure model provided with the passing wave reduction structure which concerns on Example 1 of this invention. It is a perspective view of a structure model provided with the passing wave reduction structure concerning Example 2 of this invention. It is a graph which shows a pressure waveform when a train model passes the structure model provided with the passing wave reduction structure which concerns on Example 2 of this invention. It is a graph which shows a pressure waveform when a train model passes the structure model provided with the passing wave reduction structure which concerns on Example 3 of this invention. It is a graph which shows a pressure waveform when a train model passes the structure model provided with the passing wave reduction structure which concerns on Example 4 of this invention. It is a graph which shows a pressure waveform when a different model train model passes the structure model provided with the passing wave reduction structure which concerns on Example 2 of this invention. It is a figure for demonstrating the concept of a structure passing wave, (A) is a top view, (B) is a side view.

Explanation of symbols

1 train (mobile)
1a Lead vehicle 1b Trailing vehicle 2 Track (movement route)
2a, 2b Line 3 Fixed structure 3a Side face 4 Passing wave reduction structure 5, 6, 7 Passing wave reduction part 5a, 6a, 7a Side face 8 Fixed structure 8a Wall part 8b Upper end part 9 Passing wave reduction part 9a, 9b Front face 10 Fixed structure 11 Passing wave reduction part 11a Front A, B Movement direction W Structure passing wave

Claims (3)

Passing wave reduction structure of the fixed structure that reduces the passing wave generated by the mutual interference between the fixed structure in the light section other than the tunnel section and the train traveling on the track ,
The fixed structure is
The shape when viewed from above and from the side of the track is a rectangle, and the openings where the train enters and exits are rectangular parallel to each other,
Crossover bridges, bridge stations, or three-dimensional intersections constructed so as to be substantially orthogonal to the length direction of the track so as to close the side and upper side of the train with a gap from the side and upper surface of the train. No pier or abutment ,
A passing wave reduction unit that reduces the passing wave that occurs when the train passes at a high speed of 300 km / h or more under the overpass, the bridge station or the three-dimensional intersection ,
The passing wave reducing portion is an inclined portion having an inclination angle of 30 ° or less formed at a portion extending from a lower end portion to an upper end portion of both end surfaces on the side where the train enters and exits the pier or the abutment ,
A structure for reducing the passing wave of a fixed structure. Passing wave reduction structure of the fixed structure that reduces the passing wave generated by the mutual interference between the fixed structure in the light section other than the tunnel section and the train traveling on the track ,
The fixed structure is
The shape when viewed from the side of the track is a trapezoid,
It is a soundproof wall constructed on the side of this track so as to open the upper side and upper side of this train and close the lower side of the train with a gap from the side of the train ,
Comprising a passing wave reducing unit that reduces the passing wave generated when the train passes through the side of the sound barrier at a high speed of 300 km / h or higher,
The passing wave reducing portion is an inclined portion having an inclination angle of 30 ° or less formed at a portion extending from the lower end portion to the upper end portion of the end face of the soundproof wall and the end face of the soundproof wall where the train enters and exits. thing,
A structure for reducing the passing wave of a fixed structure. Passing wave reduction structure of the fixed structure that reduces the passing wave generated by the mutual interference between the fixed structure in the light section other than the tunnel section and the train traveling on the track ,
The fixed structure is
The shape when viewed from above the track is a trapezoid,
It is a soundproof wall constructed on the side of this track so as to open the upper side and upper side of this train and close the lower side of the train with a gap from the side of the train ,
Comprising a passing wave reducing unit that reduces the passing wave generated when the train passes through the side of the sound barrier at a high speed of 300 km / h or higher,
The passing wave reducing portion has an inclination angle of 30 ° formed at a portion extending from the outside to the inside of the end face of the start end and the end of the upper end bent from the wall portion of the soundproof wall to the track side. It is the following inclined part ,
A structure for reducing the passing wave of a fixed structure.

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