CN114872739A - High-speed magnetic suspension railway tunnel capable of relieving tunnel pressure wave and construction method thereof - Google Patents
High-speed magnetic suspension railway tunnel capable of relieving tunnel pressure wave and construction method thereof Download PDFInfo
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- CN114872739A CN114872739A CN202210466612.4A CN202210466612A CN114872739A CN 114872739 A CN114872739 A CN 114872739A CN 202210466612 A CN202210466612 A CN 202210466612A CN 114872739 A CN114872739 A CN 114872739A
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- 239000000725 suspension Substances 0.000 title claims abstract description 15
- 238000010276 construction Methods 0.000 title claims abstract description 8
- 230000006837 decompression Effects 0.000 claims abstract description 15
- 238000005339 levitation Methods 0.000 claims 6
- 230000006835 compression Effects 0.000 abstract description 6
- 238000007906 compression Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000006378 damage Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61B—RAILWAY SYSTEMS; EQUIPMENT THEREFOR NOT OTHERWISE PROVIDED FOR
- B61B13/00—Other railway systems
- B61B13/10—Tunnel systems
-
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance
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- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Geology (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention discloses a high-speed magnetic suspension railway tunnel capable of relieving tunnel pressure waves and a construction method thereof. According to the invention, the buffer section with larger cross section area is arranged between the end parts of the existing tunnel structure, the arch plates arranged in a clearance way are additionally arranged in the buffer section, and the train running cavity in the arch plates is communicated with the decompression cavity outside the arch plates by the through holes on the arch plates, so that the gradient of the initial compression wave is greatly reduced, the compression wave energy is dissipated to a greater extent, and the micro-pressure wave at the outlet of the tunnel and the alternating pressure amplitude of the tunnel are relieved more efficiently.
Description
Technical Field
The invention relates to the field of high-speed magnetic suspension railway tunnel aerodynamics, in particular to a high-speed magnetic suspension railway tunnel capable of relieving tunnel pressure waves and a construction method thereof.
Background
As a novel rail transportation mode with extremely competitive power in the 21 st century, the maglev train replaces the original wheel-rail relationship with electromagnetic suspension, has the advantages of high speed, good comfort, low noise, low energy consumption and the like, is a novel transportation mode which is vigorously developed in China, and the tunnel coupling aerodynamic effect generated when the maglev train enters the tunnel becomes the focus of attention of scholars at home and abroad. Compared with the traditional wheel-track train, the high-speed maglev train has the advantages that along with the increase of the running speed, the damage caused when the high-speed maglev train passes through the tunnel is more serious. Therefore, it is necessary to mitigate the aerodynamic effects of the maglev train as it passes through the tunnel.
For the harm caused by tunnel pressure wave, the existing mitigation measures adopted at home and abroad are mainly divided into two types: firstly, a buffer structure is additionally arranged at the entrance of a tunnel, and a ventilation vertical shaft and a transverse passage are additionally arranged in the tunnel; and secondly, optimizing the shape, slenderness ratio and the like of the train head. The optimization of the train will additionally increase the manufacturing and operation and maintenance costs, and the addition of the buffer structure will be limited by factors such as the topography of the tunnel entrance.
Disclosure of Invention
The invention aims to provide a high-speed magnetic suspension railway tunnel capable of effectively relieving tunnel pressure waves and a construction method thereof aiming at the defects of the prior art.
The invention provides a high-speed magnetic suspension railway tunnel capable of relieving tunnel pressure waves, which comprises two body sections and a buffer section arranged between the two body sections, wherein the cross sectional area of the buffer section is larger than that of the body sections, an arch plate coaxially arranged with the body sections is arranged in the buffer section, the inner contour line of the arch plate does not invade the inner contour line arrangement of the body sections, the outer wall of the arch plate and the inner wall of the buffer section are arranged in a clearance manner to form a pressure reduction cavity, and the arch plate is provided with a plurality of through holes communicated with the pressure reduction cavity.
The cross-sectional area of the buffer section is 1.5 to 3 times that of the body section.
The inner contour line of the arch plate is coincided with the inner contour line of the body section.
The through holes are square or round.
The through holes are arranged in multiple rows along the axial direction of the arched plate, and the through holes in the same row are arranged at equal intervals along the axial direction of the arched plate.
The through holes are axially arranged in three rows along the arch-shaped plate, one row is arranged at the central position of the upper part of the arch-shaped plate, and the two rows are symmetrically arranged at the left side and the right side of the lower part of the arch-shaped plate.
The construction method suitable for the high-speed magnetic suspension railway tunnel comprises the following steps:
s1, excavating the inner wall of the tunnel along the radial direction at a position which is 100-200m away from the original tunnel entrance to form a buffer section with the length of 100m, and reserving the original tunnel at the two ends of the buffer section as a body section;
s2, arranging an arch plate at the original position of the inner wall of the tunnel in the buffer section, wherein the arch plate and the inner wall of the buffer section are arranged in a clearance manner to form a decompression cavity;
and S3, forming a plurality of through holes communicated with the decompression cavity on the arch plate.
According to the invention, the buffer section with larger cross section area is arranged between the end parts of the existing tunnel structure, the arch plates arranged at intervals are additionally arranged in the buffer section, the through holes on the arch plates are utilized to communicate the running cavity of the magnetic suspension train in the arch plates with the decompression cavity outside the arch plates, so that pressure wave energy generated after the magnetic suspension train enters the buffer structure is injected into the decompression cavity through the through holes, and the pressure wave entering the decompression cavity generates multiple reflection consumption phenomena under the back-and-forth blocking action of the inner wall of the tunnel buffer section and the outer wall of the arch plates, thereby greatly reducing the gradient of the initial compression wave, dissipating the compression wave energy to a greater extent, and more efficiently relieving the micro-pressure wave at the tunnel outlet and the tunnel alternating pressure amplitude.
Drawings
FIG. 1 is a schematic diagram of an axial structure according to the present invention.
Fig. 2 is a schematic view of an enlarged cross-sectional structure at a-a in fig. 1.
Fig. 3 is a schematic sectional enlarged view at B-B in fig. 1.
Fig. 4 is a schematic diagram comparing micro-pressure waves at the exit 20m of the tunnel in the present invention and the existing tunnel structure.
Fig. 5 is a schematic diagram comparing micro-pressure waves at a tunnel exit 50m in the tunnel structure of the present invention.
Fig. 6 is a schematic diagram comparing the tunnel wall pressure at the tunnel entrance 150m of the present invention with the existing tunnel structure.
The labels shown in the figures and the corresponding component names are:
1. a body section;
2. a buffer section;
3. an arch plate; 31. through holes;
4. a reduced pressure chamber.
Detailed Description
As can be seen from fig. 1 to 3, the high-speed magnetic suspension railway tunnel capable of relieving tunnel pressure waves of the present invention comprises two body sections 1, a buffer section 2 arranged between the two body sections 1, an arch-shaped plate 3 arranged in the buffer section 2 in a clearance fit manner, and a decompression cavity 4 arranged between an outer wall of the arch-shaped plate 3 and an inner wall of the buffer section 2, wherein a cross-sectional area of the buffer section 2 is larger than that of the body section 1, an inner contour of the arch-shaped plate 3 does not intrude into the inner contour of the body section 1, the arch-shaped plate 3 and the body section 1 are coaxially arranged, two ends of the arch-shaped plate 3 are in butt joint with an end face of the body section 1, the arch-shaped plate 3 is provided with a plurality of through holes 31 communicated with the decompression cavity 4, the through holes 31 are arranged in a plurality of rows at equal intervals along an axial direction of the arch-shaped plate 3, and the through holes 31 in the same row are arranged at equal intervals along the axial direction of the arch-shaped plate 3.
In the present invention, the cross-sectional area of the buffer section 2 is 1.5 to 3 times the cross-sectional area of the body section 1, and the thickness of the arch plate 3 is 0.26 m.
In the present invention, the projection of the inner contour of the arch plate 3 on the vertical plane coincides with the projection of the inner contour of the body section 1 on the vertical plane.
As can be seen from fig. 1 to 3, in the present invention, 3 rows of square through holes 31 are formed in the arch-shaped plate 3, and each row of through holes 31 is arranged along the axial direction of the arch-shaped plate 3, wherein one row of through holes 31 is arranged at the central position of the upper part of the arch-shaped plate 3, two rows of through holes 31 are symmetrically arranged at the left and right sides of the lower part of the arch-shaped plate 3, and each row of through holes 31 is 19; the distance between the through holes 31 in the same row and the through holes 31 is 5m, and the side length of the through holes 31 is 4 m.
The construction method suitable for the high-speed magnetic suspension railway tunnel comprises the following steps:
s1, excavating the inner wall of the tunnel along the radial direction at a position which is 100-200m away from the original tunnel entrance, forming a buffer section 2 with the cross section area being 1.5 times that of the body section 1 and the length being 100m by a vertical mold pouring mode, and reserving the original tunnel at the two ends of the buffer section 2 as the body section 1;
s2, arranging an arch plate 3 at the original position of the inner wall of the tunnel in the buffer section 2, and arranging the arch plate 3 and the inner wall of the buffer section 2 in a clearance way to form a decompression cavity 4;
s3, three rows of through holes 31 communicated with the decompression cavity 4 are formed in the arch-shaped plate 3, each row of through holes 31 are arranged at equal intervals along the axial direction of the arch-shaped plate 3, wherein one row of through holes 31 are arranged at the central position of the upper part of the arch-shaped plate 3, the two rows of through holes 31 are symmetrically arranged at the left side and the right side of the lower part of the arch-shaped plate 3, and each through hole 31 is square.
In the present invention, the through-holes 31 may be circular.
The data shown in table 1 can be obtained by the verification of the numerical simulation shown in fig. 4 to 6:
TABLE 1
As can be seen from table 1, after changing the tunnel structure, the data is compared with the data under the original tunnel structure as follows: the invention has the effect of reducing the micro-pressure waves at the position of 20m of the tunnel outlet by 8.6 percent, the effect of reducing the micro-pressure waves at the position of 50m of the tunnel outlet by 9.6 percent and the effect of reducing the pressure on the wall surface of the tunnel at the position of 150m of the tunnel inlet by 11.5 percent.
Therefore, after the tunnel structure is changed, the pressure wave enters the decompression cavity 4 from the through hole in the transmission process through the internal cavity structure, the repeated reflection effect is generated in the cavity, the compression wave energy is greatly reduced, the gradient of the initial compression wave is greatly reduced, the pressure on the wall surface of the tunnel is greatly reduced, and the micro-pressure wave is more efficiently relieved.
The invention is not only suitable for the high-speed magnetic suspension railway tunnel, but also suitable for the high-speed railway tunnel.
The above-mentioned embodiments, which further illustrate the objects, technical solutions and advantages of the present invention, should be understood that the above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and it will be apparent to those skilled in the art that various modifications may be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (7)
1. The utility model provides a can alleviate high-speed magnetic suspension railway tunnel of tunnel pressure wave which characterized in that: including two body sections (1) and locate buffer segment (2) between two body sections, buffer segment's cross sectional area is greater than body section's cross sectional area is equipped with arch board (3) of arranging with body section coaxial in buffer segment, and the interior profile of this arch board does not invade interior profile of body section arranges, the outer wall of arch board and buffer segment inner wall clearance arrange and form decompression chamber (4), open on the arch board have a plurality ofly and the thru hole (31) that the decompression chamber is linked together.
2. The high-speed magnetic levitation railway tunnel capable of relieving tunnel pressure waves as claimed in claim 1, wherein: the cross-sectional area of the buffer section is 1.5 to 3 times of the cross-sectional area of the body section.
3. The high-speed magnetic levitation railway tunnel capable of relieving tunnel pressure waves as claimed in claim 1, wherein: the inner contour line of the arch plate is coincided with the inner contour line of the body section.
4. The high-speed magnetic levitation railway tunnel capable of relieving tunnel pressure waves as claimed in claim 1, wherein: the through holes are square or round.
5. The high-speed magnetic levitation railway tunnel capable of relieving tunnel pressure waves as claimed in claim 1, wherein: the through holes are arranged in multiple rows along the axial direction of the arched plate, and the through holes in the same row are arranged at equal intervals along the axial direction of the arched plate.
6. The high-speed magnetic levitation railway tunnel capable of relieving tunnel pressure waves as claimed in claim 5, wherein: the through holes are axially arranged in three rows along the arch-shaped plate, one row is arranged at the central position of the upper part of the arch-shaped plate, and the two rows are symmetrically arranged at the left side and the right side of the lower part of the arch-shaped plate.
7. A construction method of a high-speed magnetic levitation railway tunnel suitable for any one of the claims 1 to 6, comprising the steps of:
s1, excavating the inner wall of the tunnel along the radial direction at a position which is 100-200m away from the original tunnel entrance to form a buffer section (2) with the length of 100m, wherein the original tunnel is reserved at the two ends of the buffer section as a body section (1);
s2, arranging an arch plate (3) at the original position of the inner wall of the tunnel in the buffer section, wherein the arch plate and the inner wall of the buffer section are arranged in a clearance way to form a decompression cavity (4);
and S3, forming a plurality of through holes (31) communicated with the decompression cavity on the arch plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210466612.4A CN114872739B (en) | 2022-04-24 | 2022-04-24 | High-speed magnetic levitation railway tunnel capable of relieving tunnel pressure wave and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210466612.4A CN114872739B (en) | 2022-04-24 | 2022-04-24 | High-speed magnetic levitation railway tunnel capable of relieving tunnel pressure wave and construction method thereof |
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| Publication Number | Publication Date |
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| CN114872739A true CN114872739A (en) | 2022-08-09 |
| CN114872739B CN114872739B (en) | 2023-10-03 |
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| CN202210466612.4A Active CN114872739B (en) | 2022-04-24 | 2022-04-24 | High-speed magnetic levitation railway tunnel capable of relieving tunnel pressure wave and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115787534A (en) * | 2022-11-11 | 2023-03-14 | 中铁第四勘察设计院集团有限公司 | Device and system for relieving micro-pressure waves |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115787534A (en) * | 2022-11-11 | 2023-03-14 | 中铁第四勘察设计院集团有限公司 | Device and system for relieving micro-pressure waves |
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