CN111350519B - Single-line tunnel and device for reducing pressure waves thereof - Google Patents
Single-line tunnel and device for reducing pressure waves thereof Download PDFInfo
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- CN111350519B CN111350519B CN202010203403.1A CN202010203403A CN111350519B CN 111350519 B CN111350519 B CN 111350519B CN 202010203403 A CN202010203403 A CN 202010203403A CN 111350519 B CN111350519 B CN 111350519B
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- 238000007789 sealing Methods 0.000 claims description 22
- 230000007246 mechanism Effects 0.000 claims description 12
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 230000008859 change Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 238000003491 array Methods 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 description 6
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- 230000005540 biological transmission Effects 0.000 description 2
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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Abstract
The invention discloses a single-wire tunnel and a device for reducing pressure waves thereof, wherein the device comprises a plurality of cavity bodies which are sequentially arranged on one side wall surface of the single-wire tunnel along the length direction of the tunnel, and the surface of each cavity body, which faces the center of the tunnel, is provided with an opening and is provided with a compression guide section which extends inwards from the opening to form a compression guide section so as to communicate the opening with the inner cavity of each cavity body; and a movable wall plate capable of moving along the length direction of the tunnel is arranged between at least one group of adjacent cavity bodies, and the peripheral edge of the movable wall plate is attached to the peripheral wall surrounding the cavity bodies so as to adjust the volume of the cavity bodies. By applying the scheme, on the basis of not enlarging the cross-sectional area of the tunnel, cavity sound absorption structure arrays are formed on two sides in the single-line tunnel, so that the change rate of the pressure wave intensity generated by a train passing through the single-line tunnel along with time is effectively reduced; meanwhile, based on the characteristic that the volume of the inner cavity is adjustable, the device can be pertinently suitable for different operating environments, and the best effect of reducing the amplitude of the micro-pressure wave at the exit of the tunnel is achieved.
Description
Technical Field
The invention relates to the technical field of rail transit tunnel engineering, in particular to a device for reducing pressure waves of a single-line tunnel.
Background
When a train passes through a single-line tunnel, due to the compressibility of air and space constraints, the head enters the tunnel entrance to generate a strong compression wave, commonly referred to as an initial compression wave. The compression wave propagates in the tunnel at the local sound velocity, part of the compression wave is reflected back to the tunnel in the form of expansion wave to the tunnel outlet, and part of the compression wave is radiated to the outside of the tunnel opening to form micro-pressure wave. Micro-pressure waves above a certain intensity can cause damage to the environment near the opening. Wherein, the size of the initial compression wave is related to the section area of the tunnel, the section area of the train, the shape and the speed of the train head, and the like. The initial compression wave amplitude value and the train running speed are basically quadratic, and the pressure wave problem formed by the intersection of the speed-up train in the single-line tunnel is more prominent.
It is known that the cross section of a tunnel is difficult to be enlarged due to the construction cost and difficulty of the tunnel. Under the condition of considering train movement aerodynamic performance, the train cross section and the head form are basically in an optimized state, and the damage of micro-pressure waves of a single-line tunnel entrance to the surrounding environment cannot be effectively relieved by the mode of arranging the buffer structure at the tunnel entrance in the prior art.
In view of this, it is desirable to optimally design a pressure wave mitigating structure of the existing single-line tunnel to control the influence of the micro pressure wave on the surrounding environment.
Disclosure of Invention
In order to solve the above technical problems, the present invention provides a single-line tunnel and a device for reducing pressure waves thereof, so as to effectively reduce the influence of micro-pressure waves on the surrounding environment.
The device for reducing the pressure wave of the single-wire tunnel comprises a plurality of cavity bodies which are sequentially arranged on one side wall surface of the single-wire tunnel along the length direction of the tunnel, wherein the surface of each cavity body, which faces the center of the tunnel, is provided with an opening, and the cavity bodies are provided with compression guide sections which extend inwards from the openings to form compression guide sections so as to communicate the openings and the inner cavities of the cavity bodies; and a movable wall plate capable of moving along the length direction of the tunnel is arranged between at least one group of adjacent cavity bodies, and the peripheral edge of the movable wall plate is attached to the peripheral wall surrounding the cavity bodies so as to adjust the volume of the cavity bodies.
Preferably, the tunnel further comprises a moving wall plate driving mechanism, and a power output end of the moving wall plate driving mechanism is connected with the moving wall plate so as to output and drive the moving wall plate to displace along the length direction of the tunnel.
Preferably, the moving panel drive mechanism comprises: one end of the screw rod is used for being connected with the movable wall plate, and the other end of the screw rod is provided with a force application part; the screw support is used for being fixedly arranged and is provided with an internal thread matched with the screw rod.
Preferably, the peripheral edges of the movable wall plates are respectively provided with a sealing element, and the sealing elements respectively construct a sealing matching pair on the corresponding side of the peripheral wall.
Preferably, the seal is switchable between an extended operative position and a retracted operative position relative to the moving wall panel in a plane parallel to the moving wall panel and is configured to: the sealing element positioned at the extending working position and the peripheral wall at the corresponding side form a sealing matching pair; the seal member is in a retracted operative position to facilitate displacement of the moving panel along the length of the tunnel.
Preferably, a plurality of the cavity bodies are arranged in the full-length area of the single-wire tunnel; and the cavity body is configured to: the natural frequency of the air vibration in the inner cavity of the tunnel is located in the frequency range of the tunnel pressure wave.
Preferably, the smallest dimension in the cross section of the compression guide section is 1/120-1/60 of the wavelength of the sound wave; the dimension of the compression guide section along the extension direction of the compression guide section is 1/3-1/2 of the maximum dimension of the inner cavity.
Preferably, the cavity bodies are divided into a plurality of size groups, and the size of the cavity body in the length direction of the single-wire tunnel is different in each size group.
The invention also provides a single line tunnel comprising an apparatus for reducing pressure waves in a single line tunnel as described above.
Preferably, two side walls of the tunnel form one side body of the hollow bodies.
Aiming at the current situation of pressure waves generated when the existing high-speed running train enters the single-track tunnel, the invention innovatively provides a device for reducing the pressure waves of the single-track tunnel, wherein a plurality of cavity bodies are sequentially arranged on one side wall surface of the tunnel along the length direction of the single-track tunnel, and the main foundation of the single-track tunnel is not required to be structurally changed; therefore, on the basis of not enlarging the cross-sectional area of the tunnel, cavity sound absorption structure arrays are formed on both sides in the single-line tunnel. Specifically, the surface of each cavity body facing the center of the tunnel is provided with an opening, and the opening is communicated with the inner cavity of the cavity body by using a compression guide section; meanwhile, the volume of the inner cavity can be adjusted by utilizing the movable wall plate according to actual needs. According to the arrangement, the air in the cavity and the pressure wave generated by the train entering can be utilized to generate resonance to form violent vibration, the air in the compression guide section overcomes the frictional resistance to realize energy consumption, and the change rate of the pressure wave intensity generated by the train passing through the single-line tunnel along with the time is effectively reduced; based on the characteristics that the inner cavity volume is adjustable, the device can be pertinently suitable for different operating environments, and the optimal effect of reducing the amplitude of the micro-pressure waves at the exit of the tunnel is achieved, so that the adverse effect of the micro-pressure waves on the exit environment of the single-line tunnel can be effectively controlled.
In a preferred scheme of the invention, a plurality of cavity bodies are arranged in the full-length area of the single-wire tunnel; and the cavity body is configured as: the natural frequency of the air vibration in the inner cavity of the tunnel is located in the frequency range of the tunnel pressure wave. That is to say, the scheme utilizes the available space in the length direction of the tunnel to reduce the amplitude of the micro-pressure wave at the exit of the tunnel to the maximum extent; simultaneously, the natural frequency of air vibration in the cavity body inner chamber is located the frequency range of tunnel pressure wave to it is unanimous with the actual pressure wave of concrete tunnel operation, ensures that the energy that corresponding pressure wave produced can fully consume.
In another preferred scheme of the invention, the plurality of cavity bodies are divided into a plurality of size groups, and the sizes of the cavity bodies of each size group along the length direction of the single-wire tunnel are different; therefore, for the situation that a plurality of pressure wave frequencies with larger energy exist in the frequency range of the tunnel pressure wave, the cavity bodies with corresponding size groups can be set in a targeted mode, so that the cavity bodies with different natural frequencies are utilized for targeted energy consumption, and a good technical guarantee is provided for further reducing the amplitude of the tunnel outlet micro-pressure wave.
Drawings
FIG. 1 is a schematic cross-sectional view of an embodiment of an apparatus for reducing a single line tunnel pressure wave;
FIG. 2 is a schematic plan view of the apparatus for reducing a single line tunnel pressure wave shown in FIG. 1;
FIG. 3 shows the mating relationship between the moving wall panel and the peripheral wall of the hollow body;
FIG. 4 shows the mating relationship of the moving web drive mechanisms;
FIG. 5 is a schematic cross-sectional view of an apparatus for reducing a single-line tunnel pressure wave according to a second embodiment;
FIG. 6 is a schematic plan view of the apparatus for reducing a single line tunnel pressure wave shown in FIG. 5.
In the figure:
the device comprises a cavity body 1, an opening 11, a compression guide section 12, an inner cavity 13, a movable wall plate 14, a sealing element 15, a screw rod 16, a nut support 17, a baffle 18 and a wall surface 2;
a cavity body 1a, a cavity body 1b and a cavity body 1 c.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
Without loss of generality, the embodiment takes the single-line tunnel shown in the figure as a description main body to describe a specific scheme for reducing the tunnel pressure wave, the single-line tunnel can pass through a bidirectional high-speed running train, and the scheme does not structurally change the main body foundation. It should be understood that the main infrastructure of the single-line tunnel is not the core inventive point of the present application and does not constitute a substantial limitation on the tunnel pressure wave control scheme claimed herein.
The first embodiment is as follows:
referring to fig. 1 and fig. 2, fig. 1 is a schematic cross-sectional view of the apparatus for reducing a single-line tunnel pressure wave according to the present embodiment; FIG. 2 is a schematic plan view of the apparatus for reducing a single line tunnel pressure wave shown in FIG. 1. For clarity of illustration of the means for reducing a pressure wave of a single line tunnel, the specific arrangement of the single line tracks and the like is not shown.
As shown in the figure, the device mainly comprises a plurality of hollow cavities 1 which are arranged in sequence along the length direction of the tunnel. A plurality of cavity bodies 1 set gradually in a lateral wall 2 along single line tunnel length direction. Wherein, the surface of each cavity body 1 facing the center of the tunnel is provided with an opening 11, and a compression guide section 12 is formed by extending inwards from the opening 11 to communicate the opening 11 with the inner cavity 13 of the cavity body 1. On the basis of not enlarging the cross sectional area of the tunnel, the scheme is used for displaying the cavity sound absorption structure inside the single-line tunnel.
When a high-speed train passes through the single-line tunnel, air in the cavity and pressure waves generated by the train entering can be utilized to generate resonance, so that severe vibration is formed; in the process, the air of the compression guide section 12 overcomes the frictional resistance to realize energy consumption, so that the change rate of the pressure wave intensity generated in the train passing through the single-line tunnel along with the time is effectively reduced, and the micro-pressure wave amplitude of the tunnel outlet is further reduced.
It should be noted that the plurality of cavity bodies 1 are preferably arranged in the full length area of the single-line tunnel, and it should be understood that the tunnel outlet micro-pressure wave amplitude is minimized by using the available space in the length direction of the tunnel, and is not limited to the partial illustration shown in the figure.
In order to adapt to the change of running parameters such as the speed of the train, the structure of the hollow cavity body 1 can be further optimized. As shown in fig. 2, six cavity bodies 1, between the first and the second cavity bodies, between the third and the fourth cavity bodies, and between the fifth and the sixth cavity bodies, which are sequentially and continuously arranged from left to right, are respectively provided with a movable wall plate 14 capable of moving along the length direction of the tunnel, and the peripheral edge of the movable wall plate 14 is attached to the peripheral wall of the cavity body 1 to adjust the volume of the inner cavity. Referring also to fig. 3, a schematic view of the mating relationship between the movable wall 14 and the surrounding wall of the hollow body is shown.
Based on the characteristics that the inner chamber volume is adjustable, this scheme can pertinence be applicable to different operational environment, and the corresponding resonant cavity body of pertinence formation reaches the best effect that reduces tunnel exit micro-pressure ripples amplitude to can effectively control the harmful effects that micro-pressure ripples produced single line tunnel exit environment. The "operating environment" herein includes adjustment or variation of comprehensive factors such as train operating speed, train type and passing frequency.
In order to take the sealing performance of the inner cavity after displacement into consideration, sealing elements 15 can be respectively arranged on the peripheral edge of the movable wall plate 14, and the sealing element 15 on each side can respectively form a sealing matching pair corresponding to the peripheral wall of each side. Here, the sealing member 15 may be made of hard rubber, or may have a supporting skeleton (not shown) provided in a rubber material. Preferably, each seal 15 is switchable between an extended operating position and a retracted operating position with respect to the moving wall plate 15, in a plane parallel to the moving wall plate 14, and is configured: the sealing elements 15 in the extended working position constitute the aforesaid respective sealing engagement pairs with the respective lateral peripheral walls; the sealing member 15 is in the retracted operative position to facilitate displacement of the movable wall 14 along the length of the tunnel for better maneuverability.
Of course, it is also possible to provide a locking member (not shown) for the extended operating position of the sealing member 15, so as to lock the sealing member 15 in the extended operating position, determining the sealing performance in the use condition.
Wherein, to the movable wallboard of adjustable relative position, can further add movable wallboard actuating mechanism, its power take off end is connected with this movable wallboard 14 to output drive movable wallboard 14 along the displacement of tunnel length direction. It will be appreciated that the moving panel drive mechanism may be automatically controlled or may be manually operated. Preferably, the displacement driving force may be provided by a screw-nut transmission mechanism. Referring also to fig. 4, a schematic view of the mating relationship of the moving web drive mechanism is shown.
As shown in fig. 4, the moving wall plate driving mechanism includes a screw rod 16 and a nut support 17, wherein one side end of the screw rod 16 is used for connecting with the moving wall plate 14, and of course, "connecting" here means that the screw rod 16 and the moving wall plate 14 can be linearly displaced synchronously, and the screw rod 16 can rotate freely; specifically, different structures can be adopted, for example, but not limited to, as shown in the figures, the screw 16 is threaded on the movable wall plate 14, and the screw 16 on both sides of the movable wall plate 14 is respectively fixedly provided with the baffle plates 18. The other end of the screw rod 16 is provided with a force application part, and when the volume of the inner cavity needs to be adjusted, an operator only needs to rotate the force application part of the screw rod 16.
Correspondingly, the nut support 17 is fixedly arranged and has an internal thread adapted to the screw 16, both constituting a screw-nut transmission mechanism providing a linear displacement driving force.
In the present embodiment, the smallest dimension in the cross section of the compression guide section 12 of the cavity body 1 is 1/120-1/60 of the wavelength of the sound wave, that is, for different cross-sectional shapes, as long as the smallest dimension in the cross section is smaller than the wavelength of the sound wave in the environment, the frictional resistance for consuming energy can be stably formed. In order to maximize energy consumption, the length dimension L of the compression guide section 12 is 1/3-1/2 of the maximum dimension of the lumen 13 along the extension direction of the compression guide section 12; here, the "maximum dimension of the inner cavity 13" means a length dimension between the innermost position of the inner cavity 13 to the outermost position thereof in the extending direction of the compression guide section 12.
Generally, when a high-speed train enters a tunnel, due to compressibility of air and space limitation, the amplitude and frequency of a compression wave generated when a head enters the entrance of the tunnel can be determined based on the existing theory, and are related to the running speed of the train, the cross-sectional area of the train and the cross-sectional area of the tunnel, and the gradient of the compression wave is related to the streamline length of the head of the train. The propagation shape of the compression wave in the tunnel changes, and different tunnel structures determine that the wave shape gradually becomes steeper or gentler. Specifically, each cavity body 1 may be configured to: the natural frequency f of the air vibration in the inner cavity of the tunnel is within the frequency range of the tunnel pressure wave. The air in the closed cavity vibrates due to the propagation of plane waves formed when the train enters the tunnel, so that corresponding resonance is formed pertinently by utilizing the cavity body with the frequency consistent with that of pressure waves generated by the actual operation of a specific tunnel, and the energy of the actual pressure waves is fully consumed.
The natural frequency f of the cavity 1 can be specifically determined according to the following formula:
c-local sound velocity;
s-cross-sectional flow area of the opening 11;
l-the length of the compression guide section 12;
v-the volume of the lumen 13.
And a good technical guarantee is provided for further reducing the amplitude of the micro-pressure wave at the tunnel outlet, and the air cavity body 1 can be further optimized. The cavity body 1 may have a plurality of outer size groups, such as but not limited to the three size groups shown in fig. 2: the cavity body 1a forms first size group, and the cavity body 1b forms second size group, and the cavity body 1c forms third size group, connects gradually the setting in arranging the region. In the scheme, the sizes of the cavity bodies of the size groups along the length direction of the single-wire tunnel are different, so that different natural frequencies f are formed. In this way, in the case where there are a plurality of pressure wave frequencies having large energy in the frequency range of the tunnel pressure wave, the cavity bodies 1 of the respective size groups can be set up targetedly, thereby performing targeted energy consumption with the cavity bodies having different natural frequencies.
In addition, this scheme cavity 1 encloses based on the both sides wall 2 in single line tunnel and closes the formation, promptly, the both sides wall 2 in single line tunnel forms the one side body of a plurality of cavity bodies 1. On the basis of effectively utilizing the existing basic structure, the inner cavity of the cavity body 1 with a relatively large size is guaranteed.
It should be noted that, based on the tunnel and the device for reducing the pressure wave of the tunnel described in the present embodiment, those skilled in the art may also make corresponding selective arrangements. Such as but not limited to: a plurality of cavity bodies 1 on every side wall face 2 of single line tunnel set up in succession, specifically can design into: the hollow cavities on each side wall surface of the single-wire tunnel are arranged at intervals; alternatively, a plurality of the hollow bodies on each side wall surface of the single-line tunnel are continuously arranged in a segmented manner, that is, are continuously arranged in a partially segmented manner, so long as the functional requirements are met, and the protection scope of the present application is also included.
Of course, the cavity body 1 can also adopt a structural form independent of the tunnel wall surface 2, and can also effectively control the amplitude of the tunnel portal micro-pressure wave.
Example two:
the core concept of the present embodiment is the same as that of the first embodiment, except that the plurality of cavity bodies 1 are all in a structural form independent of the wall surface 2. Referring to fig. 5 and fig. 6 together, fig. 5 is a schematic cross-sectional view of the apparatus for reducing a single-line tunnel pressure wave according to the present invention, and fig. 6 is a schematic plan view of the apparatus for reducing a single-line tunnel pressure wave shown in fig. 5. In order to clearly illustrate the differences and connections between the present embodiment and the first embodiment, the same functional components and structures in the drawings are denoted by the same reference numerals.
In the scheme, each cavity body 1 is of an independent structure, namely the cavity body 1 is a resonance inner cavity 13 corresponding to the self structure. Similarly, when a high-speed train passes through the single-line tunnel, air inside the cavity can be utilized to generate resonance with pressure waves generated by train entering, and accordingly severe vibration is formed; in the process, the air of the compression guide section 12 overcomes the frictional resistance to realize energy consumption, so that the change rate of the pressure wave intensity generated in the train passing through the single-line tunnel along with the time is effectively reduced, and the micro-pressure wave amplitude of the tunnel outlet is further reduced.
Other specific structures are the same as those in the first embodiment, and thus are not described again.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.
Claims (10)
1. The device for reducing the pressure wave of the single-wire tunnel is characterized by comprising a plurality of cavity bodies which are sequentially arranged on one side wall surface of the single-wire tunnel along the length direction of the tunnel, wherein the surface of each cavity body, which faces the center of the tunnel, is provided with an opening, and a compression guide section which extends inwards from the opening is formed so as to communicate the opening with the inner cavity of each cavity body; and a movable wall plate capable of moving along the length direction of the tunnel is arranged between at least one group of adjacent cavity bodies, and the peripheral edge of the movable wall plate is attached to the peripheral wall surrounding the cavity bodies so as to adjust the volume of the cavity bodies.
2. The apparatus for reducing a single line tunnel pressure wave of claim 1, further comprising a moving wall drive mechanism having a power output connected to said moving wall for output driving displacement of said moving wall along the length of the tunnel.
3. The apparatus for reducing a single line tunnel pressure wave of claim 2, wherein said moving panel drive mechanism comprises:
one end of the screw rod is used for being connected with the movable wall plate, and the other end of the screw rod is provided with a force application part;
the screw support is used for being fixedly arranged and is provided with an internal thread matched with the screw rod.
4. The apparatus for reducing a single-wire tunnel pressure wave as claimed in any one of claims 1 to 3, wherein the peripheral edges of the moving wall plates are respectively provided with sealing members, and the sealing members respectively construct sealing engagement pairs on the corresponding side of the peripheral walls.
5. The apparatus for reducing a single line tunnel pressure wave of claim 4, wherein the seal is switchable between an extended operating position and a retracted operating position relative to the moving wall panel in a plane parallel to the moving wall panel and configured to: the sealing element positioned at the extending working position and the peripheral wall at the corresponding side form a sealing matching pair; the seal member is in a retracted operative position to facilitate displacement of the moving panel along the length of the tunnel.
6. The apparatus for reducing a single line tunnel pressure wave of claim 1, wherein a plurality of said hollow cavities are disposed over the entire length of the single line tunnel; and the cavity body is configured to: the natural frequency of the air vibration in the inner cavity of the tunnel is located in the frequency range of the tunnel pressure wave.
7. The apparatus for reducing a single line tunnel pressure wave of claim 6, wherein the smallest dimension in the cross-section of the compression guide section is 1/120-1/60 of the wavelength of the sound wave; the dimension of the compression guide section along the extension direction of the compression guide section is 1/3-1/2 of the maximum dimension of the inner cavity.
8. The apparatus for reducing a single line tunnel pressure wave of claim 7, wherein the plurality of cavity bodies are divided into a plurality of size groups, the size of the cavity bodies of each size group along the length of the single line tunnel being different.
9. A single line tunnel comprising the apparatus for reducing a single line tunnel pressure wave of any one of claims 1 to 8.
10. The single-wire tunnel of claim 9, wherein two sidewalls of the tunnel form one-sided bodies of the plurality of hollow bodies.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010203403.1A CN111350519B (en) | 2020-03-20 | 2020-03-20 | Single-line tunnel and device for reducing pressure waves thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010203403.1A CN111350519B (en) | 2020-03-20 | 2020-03-20 | Single-line tunnel and device for reducing pressure waves thereof |
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| CN111350519B true CN111350519B (en) | 2021-10-01 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014163042A (en) * | 2013-02-21 | 2014-09-08 | Railway Technical Research Institute | Micro atmospheric pressure wave reduction device and tunnel structure using the same |
| CN207297020U (en) * | 2017-09-08 | 2018-05-01 | 中铁西南科学研究院有限公司 | Microbarometric wave slowing device and miro-air pressure wave in tunnel slow down structure |
| CN207297021U (en) * | 2017-09-08 | 2018-05-01 | 中铁西南科学研究院有限公司 | Microbarometric wave slowing device and tunnel structure for high-speed railway |
| CN208816131U (en) * | 2018-07-27 | 2019-05-03 | 武汉工程大学 | Bullet train tunnel exit microbarometric wave relief features |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0598891A (en) * | 1991-10-14 | 1993-04-20 | Hitachi Ltd | Tunnel provided with compression wave suppressing device |
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2020
- 2020-03-20 CN CN202010203403.1A patent/CN111350519B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014163042A (en) * | 2013-02-21 | 2014-09-08 | Railway Technical Research Institute | Micro atmospheric pressure wave reduction device and tunnel structure using the same |
| CN207297020U (en) * | 2017-09-08 | 2018-05-01 | 中铁西南科学研究院有限公司 | Microbarometric wave slowing device and miro-air pressure wave in tunnel slow down structure |
| CN207297021U (en) * | 2017-09-08 | 2018-05-01 | 中铁西南科学研究院有限公司 | Microbarometric wave slowing device and tunnel structure for high-speed railway |
| CN208816131U (en) * | 2018-07-27 | 2019-05-03 | 武汉工程大学 | Bullet train tunnel exit microbarometric wave relief features |
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