CN103016023A - Bell mouth tunnel portal structure - Google Patents
Bell mouth tunnel portal structure Download PDFInfo
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- CN103016023A CN103016023A CN2012105925226A CN201210592522A CN103016023A CN 103016023 A CN103016023 A CN 103016023A CN 2012105925226 A CN2012105925226 A CN 2012105925226A CN 201210592522 A CN201210592522 A CN 201210592522A CN 103016023 A CN103016023 A CN 103016023A
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Abstract
The invention provides a bell mouth tunnel portal structure which comprises a tunnel portal section lining structure. The bell mouth tunnel portal structure is characterized in that the outer side of the lining structure is in smooth butt joint with a tunnel portal; the tunnel portal extends outwards; and the cross section area of a cavity in the tunnel portal is gradually increased to the periphery to form a bell mouth. The bell mouth tunnel portal structure can satisfy the aerodynamics requirements in the railway tunnel design standards, can reduce the pressure peak value of micro-pressure waves by 20-35%, has no need to additionally provide a special buffer structure, and has no need to implement the additional brushing for walls of the tunnel portal, so that the brushing quantity of the tunnel portal is low, and the structure has the advantages of simple structure and small occupied space. As the structure is simple, the longitudinal length is small, and the demands to the terrain and the geology of the tunnel portal are low, the structure further has the advantages of strong adaptability and low cost. And at the same time, the diagonal plane tunnel portal further has excellent functions of preventing slope collapse and stone fall, good stability and strong practicability.
Description
Technical field
The present invention relates to the Tunnel Portal Structures field, specifically refer to a kind of horn mouth Tunnel Portal Structures.
Background technology
During High-speed Trains Passing Through Tunnel, will in the tunnel, bring out a series of aerodynamic effects, wherein, most importantly transient pressure and High-speed Railway Tunnel Exit Micro-pressure Wave in the tunnel.The transition meeting of pressure produces pressure differential in ear-drum, directly affect the comfortable and healthy of personnel on the train, can solve by the sealing index that improves train; High-speed Railway Tunnel Exit Micro-pressure Wave can produce explosive sound in outlet, affects the acoustic environment of tunnel exit periphery, and so that near lightweight structures thing (housing window) sharply vibrates, this phenomenon is called micro-pressure wave phenomenon.Micro-pressure wave phenomenon causes serious noise pollution, and peripheral resident is produced the bad mental impact, and is larger to the harmfulness of environment.For the micro-pressure wave effect being reduced within the scope of Design of Railway Tunnel regulation and stipulation, the designer takes the measure optimizing the portal form, the hole buffer structure is set usually both at home and abroad.But, special buffer structure is set not only occupies more spaces, the former landform landforms in hole are destroyed large, and constructional difficulties, degree of safety is low, cost is high.Therefore, optimize the attention that the portal form more and more is subject to domestic and international designer.
Traditional railway tunnel portal pattern mainly contains headwall formula, aileron formula, pillar and step, and these portal patterns can not be alleviated hole micro-pressure wave effect, and larger to destruction of surface, is unfavorable for the requirement that the present environmental protection of advocating and water are protected.Although the cap brim bias-cutting type hole-door structure can be alleviated railway tunnel hole micro-pressure wave effect, complex structure, design and construction are difficult, cost is high, poor for applicability.
Summary of the invention
The objective of the invention is provides a kind of horn mouth Tunnel Portal Structures according to above-mentioned deficiency, make its have simple in structure, steadiness good, be easy to construction, saves cost, and it is remarkable to alleviate micro-pressure wave effect effect.
The present invention is achieved through the following technical solutions:
A kind of horn mouth Tunnel Portal Structures comprises tunnel portal section liner structure, it is characterized in that: smooth-going to being connected to portal in the described liner structure outside, described portal stretches out and portal internal cavity area of section forms horn mouth to enlarging gradually all around.Can effectively alleviate the aerodynamic effects at hole place, so the hole do not need to arrange special buffer structure again, just can satisfy the aerodynamics requirement in the Design of Railway Tunnel standard.Need not to be the extra side of brush of portal wall, brush side, hole amount is few, can be reduced to brush side, hole minimum.The portal resistance to overturning is good, and is not fragile.
Wall thickness equates between the portal inside and outside wall.This structure is more firm.
Preferably, described portal end face is inclined cutout.Can better alleviate the micro-pressure wave effect.
Further, described portal end face is positive inclined cutout or the inclined cutout of falling.Can further alleviate the micro-pressure wave effect.
Preferably, the angle of slope between horn mouth and hole axis is 100-175 °.
Preferably, form at the vault place between the outer wall of the top of described portal and liner structure and choose height.Have good anti-slope failure, rock-fall proof function, need not to arrange brim structure, easy construction, cost are low.
Preferably, described portal is the integral reinforced concrete pour mass, and docks with the tunnel uniform section.Has good, the non-damageable advantage of whole steadiness.
Horn mouth tunnel portal of the present invention can satisfy the aerodynamics requirement in the Design of Railway Tunnel standard, the pressure peak of micro-pressure wave can be cut down 20-35%, need not additionally to arrange special buffer structure, need not to be the extra side of brush of portal wall, brush side, hole amount is few, thus have simple in structure, little advantage takes up space.And because simple in structure, longitudinal length is little, and is low to tunnel portal landform and geologic requirements, so applicability is also strong, and cost is low.The portal of scarf also has good anti-slope failure, the function of rock-fall proof simultaneously, and steadiness is good, has very strong practicality.
Description of drawings
Fig. 1 is perspective view of the present invention;
Fig. 2 is that master of the present invention looks schematic diagram;
Fig. 3 is the longitudinal section schematic diagram of the positive inclined cutout of the present invention;
Fig. 4 is that the present invention falls the longitudinal section schematic diagram of inclined cutout;
The landform bank protection, 2. liner structure, 3. portal, 4. the portal inwall, 5. the portal outer wall, 6. choose height, 7. tunnel.
The specific embodiment
Further specify the present invention below in conjunction with accompanying drawing:
Shown in Fig. 1-2, horn mouth Tunnel Portal Structures of the present invention is positioned on the landform bank protection 1, comprise liner structure 2 and be positioned at liner structure 2 outsides and the portal 3 of docking with it, described portal 3(comprises portal inwall 4 and portal outer wall 5) stretch out and portal internal cavity area of section to around enlarge gradually and form the horn mouth shape.And wall thickness equates between portal 3 inside and outside walls.Can effectively alleviate the aerodynamic effects at hole place, so the hole do not need to arrange special buffer structure again, just can satisfy the aerodynamics requirement in the Design of Railway Tunnel standard.Need not to be the extra side of brush of portal wall, brush side, hole amount is few, can be reduced to brush side, hole minimum.The end face of described portal 3 is the positive inclined cutout that progressively tilts inwardly from down to up as shown in Figure 3, or as shown in Figure 4 from down to up progressively towards the inclined cutout of falling of outer incline, further alleviates the aerodynamic effects at place, hole.。Require also can be arranged to the vertical type portal in the lower situation at hole micro-pressure wave peak value, to simplify construction.Described portal 3 is the integral reinforced concrete pour mass, and docks with the tunnel uniform section, so the portal resistance to overturning is good, and is not fragile.Portal end slope angle is 100-175 °.The horn mouth expansion angle of the inside and outside wall of described portal and portal end slope angle can suitably be selected according to peripheral landform, execution conditions and train running speed.
Because portal of the present invention 3 adopts the horn mouth shapes, can form at the vault place of portal 3 therefore that to be higher than choosing of liner structure 2 high by 6, make it have good anti-slope failure, rock-fall proof function.The ring width scarf portal end platform such as of the present invention can effectively be alleviated the aerodynamic effects at place, hole, so the hole do not need to arrange special buffer structure again, just can satisfy the aerodynamics requirement in the Design of Railway Tunnel standard.Need not to be the extra side of brush of portal wall, brush side, hole amount is few, can be reduced to brush side, hole minimum.And it is little that portal takies longitudinal space, can satisfy the aerodynamics requirement in the Design of Railway Tunnel standard, can take full advantage of the former earth's surface of tunnel portal stable side slope and vegetation, and brush side, hole amount is few.Portal structure of the present invention is the integral reinforced concrete pour mass, and portal outer wall 5 docks with the tunnel uniform section, so the portal resistance to overturning is good, and is not fragile.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a horn mouth Tunnel Portal Structures comprises tunnel portal section liner structure, it is characterized in that: smooth-going to being connected to portal in the described liner structure outside, described portal stretches out and portal internal cavity area of section forms horn mouth to enlarging gradually all around.
2. described horn mouth Tunnel Portal Structures according to claim 1, it is characterized in that: wall thickness equates between the portal inside and outside wall.
3. described horn mouth Tunnel Portal Structures according to claim 1, it is characterized in that: described portal end face is inclined cutout.
4. described horn mouth Tunnel Portal Structures according to claim 3, it is characterized in that: described portal end face is positive inclined cutout or the inclined cutout of falling.
5. the ring width inclined cutout Tunnel Portal Structures such as described according to claim 1, it is characterized in that: the angle of slope between horn mouth and hole axis is 100-175 °.
6. described horn mouth Tunnel Portal Structures according to claim 1 is characterized in that: form at the vault place between the top of described portal and the outer wall of liner structure and choose height.
7. the ring width inclined cutout Tunnel Portal Structures such as described according to claim 1, it is characterized in that: described portal is the integral reinforced concrete pour mass, and docks with the tunnel uniform section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105925226A CN103016023A (en) | 2012-12-31 | 2012-12-31 | Bell mouth tunnel portal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105925226A CN103016023A (en) | 2012-12-31 | 2012-12-31 | Bell mouth tunnel portal structure |
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| CN103016023A true CN103016023A (en) | 2013-04-03 |
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| CN2012105925226A Pending CN103016023A (en) | 2012-12-31 | 2012-12-31 | Bell mouth tunnel portal structure |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074527A (en) * | 2014-07-17 | 2014-10-01 | 中铁二院工程集团有限责任公司 | Side slope and heading slope combined supporting tunnel entrance structure |
| CN104464500A (en) * | 2014-11-21 | 2015-03-25 | 陕西铁路工程职业技术学院 | Training base of high-speed rail tunnel and building method of training base |
| CN107190659A (en) * | 2017-06-26 | 2017-09-22 | 江苏中路交通科学技术有限公司 | A kind of tunnel road structure |
| 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 |
| CN111271075A (en) * | 2020-04-01 | 2020-06-12 | 四川省交通勘察设计研究院有限公司 | Tunnel entrance to a cave section structure that can guide formula and prevent falling rocks |
| CN112814696A (en) * | 2021-03-16 | 2021-05-18 | 河北工程大学 | Design optimization method of inclined tunnel entrance buffer structure |
| CN114183164A (en) * | 2021-11-30 | 2022-03-15 | 中铁二院工程集团有限责任公司 | Enlarged type voltage reduction buffer device for tunnel portal of high-speed railway and design method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201486563U (en) * | 2009-06-29 | 2010-05-26 | 中铁二院工程集团有限责任公司 | Tunnel portal structure of high-speed railway |
| CN201738254U (en) * | 2010-08-09 | 2011-02-09 | 中铁第一勘察设计院集团有限公司 | Buffering structure for buffering micro-pressure wave at high-speed railway tunnel portal |
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2012
- 2012-12-31 CN CN2012105925226A patent/CN103016023A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201486563U (en) * | 2009-06-29 | 2010-05-26 | 中铁二院工程集团有限责任公司 | Tunnel portal structure of high-speed railway |
| CN201738254U (en) * | 2010-08-09 | 2011-02-09 | 中铁第一勘察设计院集团有限公司 | Buffering structure for buffering micro-pressure wave at high-speed railway tunnel portal |
Non-Patent Citations (2)
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| 仇文革; 章慧健: "论客运专线隧道洞门及洞口景观设计", 《铁路客运专线建设技术交流会论文集》, 1 November 2005 (2005-11-01) * |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074527A (en) * | 2014-07-17 | 2014-10-01 | 中铁二院工程集团有限责任公司 | Side slope and heading slope combined supporting tunnel entrance structure |
| CN104074527B (en) * | 2014-07-17 | 2016-08-24 | 中铁二院工程集团有限责任公司 | Face-upward slope combined supporting Tunnel Portal Structures |
| CN104464500A (en) * | 2014-11-21 | 2015-03-25 | 陕西铁路工程职业技术学院 | Training base of high-speed rail tunnel and building method of training base |
| CN107190659A (en) * | 2017-06-26 | 2017-09-22 | 江苏中路交通科学技术有限公司 | A kind of tunnel road structure |
| 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 |
| CN111271075A (en) * | 2020-04-01 | 2020-06-12 | 四川省交通勘察设计研究院有限公司 | Tunnel entrance to a cave section structure that can guide formula and prevent falling rocks |
| CN112814696A (en) * | 2021-03-16 | 2021-05-18 | 河北工程大学 | Design optimization method of inclined tunnel entrance buffer structure |
| CN112814696B (en) * | 2021-03-16 | 2023-01-31 | 河北工程大学 | Design optimization method of inclined cut type tunnel entrance buffer structure |
| CN114183164A (en) * | 2021-11-30 | 2022-03-15 | 中铁二院工程集团有限责任公司 | Enlarged type voltage reduction buffer device for tunnel portal of high-speed railway and design method |
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Application publication date: 20130403 |