CN203230428U - Brim beveling-type tunnel opening buffer structure - Google Patents
Brim beveling-type tunnel opening buffer structure Download PDFInfo
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- CN203230428U CN203230428U CN 201220750716 CN201220750716U CN203230428U CN 203230428 U CN203230428 U CN 203230428U CN 201220750716 CN201220750716 CN 201220750716 CN 201220750716 U CN201220750716 U CN 201220750716U CN 203230428 U CN203230428 U CN 203230428U
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- tunnel
- buffer structure
- brim
- opening
- portal
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Abstract
The utility model provides a brim beveling-type tunnel opening buffer structure. The buffer structure is characterized in that the opening buffer structure comprises a pilot tunnel, wherein the pilot tunnel is in a butt joint with an opening lining structure and is arranged at the outside of a tunnel; a tunnel portal end table is provided at the entrance of the tunnel portal, and the top of the pilot tunnel is provided with two openings along the length direction of the tunnel, or the side wall of the pilot tunnel is respectively provided with two openings along the length direction of the tunnel. According to the brim beveling-type tunnel opening buffer structure, a tunnel opening micro-pressure wave effect of a railway tunnel can be mitigated; the buffer structure is shorter and requires a small opening space so that the buffer structure is slightly limited to the landform of the opening; by providing an optimal opening position and structural parameters, the capability of the buffer structure for mitigating the micro-pressure wave effect of the opening can be achieved to the greatest extent, the production cost of the opening buffer structure is effectively reduced, the economic benefit is obvious, and extremely high practicability is achieved.
Description
Technical field
The utility model relates to the Tunnel Portal Structures field, specifically refers to a kind of the brim of a hat inclined cutout tunnel portal buffer structure.
Background technology
When bullet train passes through the tunnel, can in the tunnel, produce a series of aerodynamic effects with the tunnel portal place, mainly comprise reaching pneumatic load effect and locomotive additional drag effect in the interior transient pressure effect of train, tunnel portal micro-pressure wave effect, the tunnel in the hole.Wherein, the main performance of hole micro-pressure wave effect is: the place produces the Pneumatical Blowing noise at the hole, causes the hole low frequency high vibration of lightweight structures thing (locomotive window, housing window) on every side.Hole micro-pressure wave effect is destroyed bigger to the hole surrounding environment, have a strong impact on hole periphery resident's daily life.
It is a kind of method that is commonly used to alleviate the micro-pressure wave effect that the hole buffer structure is set at the tunnel portal place, and the hole buffer structure is the hole body extension section that is stretched out and formed by the lining cutting of tunnel portal section, and in hole body extension section surface arrange openings.Buffer structure length, open amount, parameters such as aperture position, buffer structure cross-sectional area are determined according to the factors such as blockage ratio in length of tunnel, locomotive speed, type of locomotive, hole landform, locomotive and tunnel.According to open amount, can be divided into three kinds of buffer structures of single radial cut type, two open-type, many open-types (3 and more than) to buffer structure; According to the ratio of buffer structure with the cross-sectional area of tunnel portal lining cutting section, can be divided into uniform section type and expansion type buffer structure to buffer structure.Existing buffer structure can play the effect of alleviating hole micro-pressure wave effect, but parameters such as the length of buffer structure, cross-sectional area, aperture position, the aperture opening ratio ratio of tunnel cross sectional area (the opening gross area with), open amount, portal form can the appreciable impact buffer structure to the remission effect of hole micro-pressure wave effect, cause alleviating on the one hand micro-pressure wave poor effect, financial cost height on the other hand.And short tunnel is stronger in the hole micro-pressure wave effect ratio in the tunnel of growing up, and usually adopts long many openings expansion type buffer structure.But at little landform places, space, hole such as bridge tunnel linkage sections, long many openings expansion type buffer structure often can't be set.
Summary of the invention
The purpose of this utility model is to provide a kind of the brim of a hat inclined cutout tunnel portal buffer structure according to above-mentioned deficiency, makes that it is simple in structure, steadiness good, cost is low, and it is remarkable to alleviate micro-pressure wave effect effect, is applicable to the tunnel of growing up that the space, hole is little.
The utility model is achieved by the following technical solution:
A kind of the brim of a hat inclined cutout tunnel portal buffer structure, it is characterized in that: described hole buffer structure comprises with the hole liner structure and docking, and be positioned at the pilot tunnel in the tunnel outside, in described pilot tunnel entrance portal end platform is set, the horn mouth of described portal end platform for outwards turning up, bell-mouthed inside and outside wall forms at the top and chooses height, chooses the scarf of high part for progressively tilting from down to up inwardly; Described pilot tunnel top is furnished with two openings along the length of tunnel direction, or the pilot tunnel sidewall is along respectively arranging two openings on the length of tunnel direction.The mode of the portal end platform by the brim of a hat inclined cutout is set and pilot tunnel opening buffering can be alleviated the micro-pressure wave effect, simultaneously 2 openings only need be set and be effective, and provides cost savings.
Preferably, described pilot tunnel cross-sectional area is 1.1-1.9:1 with the area ratio of hole liner structure cross-sectional area.This buffer structure pilot tunnel is expansion formula pilot tunnel, alleviates micro-pressure wave effect better effects if.
Preferably, the length at described pilot tunnel top is 15-30m.Preferred pilot tunnel length can reduce the hole and take up room, and stronger to the compliance of landform, especially little bridge tunnel junction, space, hole has stronger practicality.
Preferably, the described opening gross area is 0.1-0.35 with the area ratio of hole liner structure cross-sectional area.This preferable range has the effect of good alleviation micro-pressure wave effect, and difficulty of construction is low simultaneously.
Preferably, the angle of slope of described portal end platform is 30-75 °.This preferable range has the effect of good alleviation micro-pressure wave effect, and difficulty of construction is low simultaneously, and security performance is good.
Preferably, to choose high angle of slope be 100-135 ° to described the brim of a hat inclined cutout end platform.Security performance is better, and attractive in appearance, and difficulty of construction is low.
Preferably, described opening equates with spacing and the aperture pitch at pilot tunnel two ends.
Preferably, the described height of choosing is 0.1-3m with the pilot tunnel distance from top.
The brim of a hat inclined cutout tunnel portal buffer structure of the present utility model is steel concrete monobloc cast body, resistance to overturning is good, the degree of safety height, the hole micro-pressure wave effect of railway tunnel be can significantly alleviate, the Property of Blasting Noise pollution of high-speed railway tunnel portal and the low frequency vibration problem of lightweight structures thing (housing window) effectively solved.The utility model the brim of a hat inclined cutout tunnel portal buffer structure has provided the optional scope at each parameter of buffer structure (buffer structure length, aperture opening ratio, portal angle of slope) simultaneously, enlarged the range of application of buffer structure, can be under identical cost situation, reach best hole micro-pressure wave remission effect, realize the economic effect maximization.The utility model length is shorter in addition, and it is little to take the space, hole, and is strong to hole landform compliance, has to be subjected to the little advantage of hole landform restriction, is particularly useful for less bridge tunnel junction, space, hole.
Description of drawings
Fig. 1 is the open-topped perspective view of the utility model pilot tunnel;
Fig. 2 looks schematic diagram for master of the present utility model;
Fig. 3 is the open-topped longitudinal section schematic diagram of the utility model pilot tunnel;
Liner structure, 2. pilot tunnel, 3. portal end platform, 4. first opening, 5. second opening, 6. the landform bank protection, 7. portal end platform outer wall, 8. horn mouth, 9. portal end platform inwall, 10. choose height, 11. pilot tunnel outer walls, 12. portal end platform angle of slope, 13. the brim of a hat inclined cutout end platforms and choose high dip angle, 14. liner structure inwalls, 15. liner structure outer walls.
The specific embodiment
Further specify the utility model below in conjunction with accompanying drawing:
As Figure 1-3, the utility model hole buffer structure is positioned on the landform bank protection 6, comprise with hole liner structure 1 cross section expansion formula and docking, and be positioned at the pilot tunnel 2 in the tunnel outside, in described pilot tunnel 2 entrance portal end platform 3 is set, the horn mouth 8 of described portal end platform 3 for outwards turning up, the inwall 9 of toroidal portal end platform 3 and outer wall 7 are chosen high by 10 in top formation, and portal end platform outer wall 7 links to each other with pilot tunnel outer wall 11.Described pilot tunnel 2 tops evenly are furnished with two openings along the length of tunnel direction, i.e. first opening 4 and second opening 5, or pilot tunnel sidewall center line upper edge length of tunnel direction is respectively arranged two openings (not drawing among the figure).The length at described pilot tunnel top is 15-30m.Pilot tunnel 2 cross-sectional areas that described pilot tunnel outer wall 11 and pilot tunnel inwall (not drawing among the figure) are formed are 1.1-1.9:1 with the area ratio of the hole liner structure 1 internal cavity cross-sectional area that liner structure outer wall 15 and liner structure inwall 14 are formed.The described opening gross area is 0.1-0.35 with the area of hole liner structure cross-sectional area than β.Described portal end platform angle of slope 12 is 30-75 °.Described the brim of a hat inclined cutout end platform is chosen high angle of slope 13 and is 100-135 °.Described choose high 10 with pilot tunnel 2 distance from tops be 0.1-3m.
As shown in Figure 3, it is 20m for the length L at pilot tunnel 2 tops that the utility model is specifically used optimum embodiment, the cross-sectional area of pilot tunnel 2 is 1.5 with the ratio of the cross-sectional area of hole liner structure 1, aperture opening ratio β is 0.18, portal end platform angle of slope 12 is 45 °, and it is 105 ° that the brim of a hat inclined cutout end platform is chosen high angle of slope 13.The longitudinal length a of first opening 4 is 3.7m, the longitudinal length b of second opening 5 is 3.7m, first opening 4 and pilot tunnel one end spacing c1 are that the spacing c2 of 4.2m, first opening 4 and second opening 5 is that 4.2m, second opening 5 are 4.2m with pilot tunnel other end spacing c3, and the hoop width of opening converts and can get according to aperture opening ratio and tunnel cross-sectional area.For the situation of sidewall opening, vertical parameter of opening is identical with open top, the hoop parameter of opening (being A/F) for open-topped half.
The utility model is steel concrete monobloc cast body, resistance to overturning is good, the degree of safety height can significantly be alleviated the hole micro-pressure wave effect of railway tunnel, and the Property of Blasting Noise that effectively solves the high-speed railway tunnel portal is polluted and the low frequency vibration problem of lightweight structures thing (housing window).The utility model the brim of a hat inclined cutout tunnel portal buffer structure has provided the optional scope at each parameter of buffer structure (buffer structure length, aperture opening ratio, portal angle of slope) simultaneously, enlarged the range of application of buffer structure, can be under identical cost situation, reach best hole micro-pressure wave remission effect, realize the economic effect maximization.The utility model length is shorter in addition, and it is little to take the space, hole, and is strong to hole landform compliance, has to be subjected to the little advantage of hole landform restriction, is particularly useful for less bridge tunnel junction, space, hole.
The above only is preferred embodiment of the present utility model, and is in order to limit the utility model, not all within spirit of the present utility model and principle, any modification of doing, is equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (8)
1. the brim of a hat inclined cutout tunnel portal buffer structure, it is characterized in that: described hole buffer structure comprises with the hole liner structure and docking, and be positioned at the pilot tunnel in the tunnel outside, in described pilot tunnel entrance portal end platform is set, the horn mouth of described portal end platform for outwards turning up, bell-mouthed inside and outside wall forms at the top and chooses height, chooses the scarf of high part for progressively tilting from down to up inwardly; Described pilot tunnel top is furnished with two openings along the length of tunnel direction, or the pilot tunnel sidewall is along respectively arranging two openings on the length of tunnel direction.
2. according to the described the brim of a hat inclined cutout of claim 1 tunnel portal buffer structure, it is characterized in that: described pilot tunnel cross-sectional area is 1.1-1.9:1 with the area ratio of hole liner structure cross-sectional area.
3. according to the described the brim of a hat inclined cutout of claim 1 tunnel portal buffer structure, it is characterized in that: the length at described pilot tunnel top is 15-30m.
4. according to the described the brim of a hat inclined cutout of claim 1 tunnel portal buffer structure, it is characterized in that: the described opening gross area is 0.1-0.35 with the area ratio of hole liner structure cross-sectional area.
5. according to the described the brim of a hat inclined cutout of claim 1 tunnel portal buffer structure, it is characterized in that: the angle of slope of described portal end platform is 30-75 °.
6. according to the described the brim of a hat inclined cutout of claim 1 tunnel portal buffer structure, it is characterized in that: it is 100-135 ° that described the brim of a hat inclined cutout end platform is chosen high angle of slope.
7. according to the described the brim of a hat inclined cutout of claim 1 tunnel portal buffer structure, it is characterized in that: described opening equates with spacing and the aperture pitch at pilot tunnel two ends.
8. according to the described the brim of a hat inclined cutout of claim 1 tunnel portal buffer structure, it is characterized in that: the described height of choosing is 0.1-3m with the pilot tunnel distance from top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220750716 CN203230428U (en) | 2012-12-31 | 2012-12-31 | Brim beveling-type tunnel opening buffer structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220750716 CN203230428U (en) | 2012-12-31 | 2012-12-31 | Brim beveling-type tunnel opening buffer structure |
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| Publication Number | Publication Date |
|---|---|
| CN203230428U true CN203230428U (en) | 2013-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220750716 Expired - Lifetime CN203230428U (en) | 2012-12-31 | 2012-12-31 | Brim beveling-type tunnel opening buffer structure |
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| CN (1) | CN203230428U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104564098A (en) * | 2013-10-21 | 2015-04-29 | 韩国铁道技术研究院 | Structure for reducing tunnel micro pressure wave including air pipe |
| CN109667597A (en) * | 2018-12-29 | 2019-04-23 | 中铁十七局集团第三工程有限公司 | Tunnel hat brim type portal building method |
-
2012
- 2012-12-31 CN CN 201220750716 patent/CN203230428U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104564098A (en) * | 2013-10-21 | 2015-04-29 | 韩国铁道技术研究院 | Structure for reducing tunnel micro pressure wave including air pipe |
| CN104564098B (en) * | 2013-10-21 | 2017-09-26 | 韩国铁道技术研究院 | Include the structure of breather pipe for reduce tunnel micro-pressure wave |
| CN109667597A (en) * | 2018-12-29 | 2019-04-23 | 中铁十七局集团第三工程有限公司 | Tunnel hat brim type portal building method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131009 |
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| CX01 | Expiry of patent term |