CN108018808A - Flexible energy anti-car in tunnel face hits structure and its installation method - Google Patents
Flexible energy anti-car in tunnel face hits structure and its installation method Download PDFInfo
- Publication number
- CN108018808A CN108018808A CN201711239020.4A CN201711239020A CN108018808A CN 108018808 A CN108018808 A CN 108018808A CN 201711239020 A CN201711239020 A CN 201711239020A CN 108018808 A CN108018808 A CN 108018808A
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- China
- Prior art keywords
- column
- collision body
- shaft
- car
- flexible energy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000009434 installation Methods 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000005265 energy consumption Methods 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 3
- 208000002193 Pain Diseases 0.000 claims description 2
- 230000006378 damage Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 230000008676 import Effects 0.000 abstract description 2
- 230000035939 shock Effects 0.000 abstract description 2
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F15/00—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact
- E01F15/14—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact specially adapted for local protection, e.g. for bridge piers, for traffic islands
- E01F15/145—Means for vehicle stopping using impact energy absorbers
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
Abstract
The present invention relates to the anti-car of tunnel face flexible energy to hit structure and its installation method, and the structure includes anti-the collision body energy consuming components and roller guidance set of front and rear assembling；Anti- collision body energy consuming components include the anti-collision body around vertical column and column；Roller guidance set includes the roller outside vertical shaft and shaft.The present invention is by being oriented to, vehicle is imported in tunnel and avoids vehicle and hole wall from colliding by interception mode, effect with dissipation large energy, reduction impact, when vehicular sideview shock occurs, tunnel face anti-collision facility is by being oriented to, consuming energy, reducing energy exchange reduces impact and imports vehicle in tunnel, guiding, energy consumption can be realized when frontal impact occurs, reduces impact so as to reduce damage, safety guarantee is provided for tunnel face.
Description
Technical field
The invention belongs to traffic safety protection technical field, and in particular to a kind of anti-car of tunnel face flexible energy hit structure and
Its installation method.
Background technology
Highway crash facility is concentrated mainly at trackside, median strip and bridge pier at present, specifically for tunnel face
Anti-collision facility research is very few, and part tunnel face uses traditional guardrail, therefore accident once occurs, and suffers heavy losses.
The content of the invention
The object of the present invention is to provide a kind of anti-car of tunnel face flexible energy to hit structure and its installation method, by being oriented to,
Interception mode, which imports vehicle in tunnel, avoids vehicle from being collided with hole wall, has dissipation large energy, reduces the effect of impact.
The technical solution adopted in the present invention is：
Flexible energy anti-car in tunnel face hits structure, it is characterised in that：
Anti- collision body energy consuming components and roller guidance set including front and rear assembling；
Anti- collision body energy consuming components include the anti-collision body around vertical column and column；
Roller guidance set includes the roller outside vertical shaft and shaft.
Flexible energy element is provided between column and anti-collision body.
Column is square steel, its four sides are both provided with T-shaped plate；
The prismatoid that flexible energy element is made of rubbery outer cover and internal filling nano-fluid material, prismatoid end face is set
There is the cooperation of the T-shaped plate of groove profile steel plate and column.
Anti- collision body is cylindrical in shape, and chamber, inside filling energy consumption core, surface steel plate are formed by composite material outside plate and partition plate
Parcel；
The pre-buried connection bolt in wall position corresponding with flexible energy element is used to be connected with flexible energy element in anticollision body.
The vertical groove of cross section semicircular in shape is provided with front side of the external wall of anticollision；
Shaft is round steel pipe, and centre of the drum opens cylindrical hole, and shaft is arranged at the semicircle vertical groove of anti-collision body through roller
It is interior.
The semicircle vertical groove inner wall of anti-collision body is provided with upper and lower two annulus holes for being used for positioning rotating shaft；
Horizontal spring is provided between the annulus hole of the semicircle vertical groove inner wall of shaft and anti-collision body.
Column bottom is embedded in below road surface fixed；
Column and shaft bottom are both provided with the support base for being used to support anti-collision body.
At the top of column column cover board is provided between anti-collision body；
Column top is provided with column end cap, and shaft top is provided with shaft end cap.
Circular arc flange and circular arc pit are respectively arranged with left and right sides of anti-collision body, stinging for structure is hit for two neighboring anti-car
Conjunction is located by connecting.
Flexible energy anti-car in tunnel face hits the installation method of structure, it is characterised in that：
Comprise the following steps：
Step 1：Foundation pit is dug to projected depth；
Step 2：Support base and column are installed, according to design buried depth and position, support base is penetrated to column lower part in advance, by it
Installation is in place；
Step 3：Anti- collision body is bolted with being connected in advance with flexible energy element, is worn from top to bottom along the T-slot of column
Enter, and be landed on support base；
Step 4：Roller is placed in anti-collision body semicircle vertical groove, and centering circular hole；
Step 5：Shaft is penetrated to annulus hole on anti-collision body, shaft hole, lower annulus hole from top to bottom, and is threaded into support
In seat circular hole；
Step 6：Column cover board is installed at the top of anti-collision body and is fixed with column；
Step 7：Column end cap and shaft end cap are installed successively, fixed respectively with column and shaft；
Step 8：According to demand, repeat step one to seven, two neighboring anti-car hit structure between be on the one hand by column spacing
Positioning, still further aspect is positioned by way of flange occlusion；
Overall alignment as needed is in line type, arc-shaped or waveform.
The present invention has the following advantages：
（1）Buffering energy-consumption is good：
When colliding, by flexible energy element and anti-collision body deformation consumption jolt capacity, by impact control acceptable
Scope；It is minimum to the degree of injury of passenger；
（2）Guidance quality is good：
It is arranged on and meets the rolling for hitting side and can be rotated along shaft, vehicle is imported normally travel by roll rotational when Vehicular impact
Direction, avoids and tunnel face frontal impact；
（3）Universal strong：
The present invention is modularized design, can increase module according to protective range and can be achieved, and safety device takes up an area
It is few, without prejudice to vehicle pass-through；
（4）It is convenient that installation is replaced：
The present invention by modes such as card slots reduces joint connection in site operation, install, replace, repair it is convenient.
（5）Inductivity is strong：
Outer surface of the present invention uses obvious warning mark, can induce the sight of driver.
（6）Security：
Material of the present invention and structure choice are reasonable, avoid anticollision device, collision-prevention device infringement from producing secondary injury.
Brief description of the drawings
Fig. 1 is the structural front view of the present invention；
Fig. 2 is the structure left view of the present invention；
Fig. 3 is the structure top view of the present invention；
Fig. 4 is the application examples 1 of the present invention；
Fig. 5 is the application examples 2 of the present invention.
In figure：1- column end caps, 2- columns, 3- column cover boards, the anti-collision bodies of 4-, 5- connection bolts, 6- flexible energy elements,
7- shaft end caps, 8- shafts, 9- rollers, 10- support bases, 11- springs.
Embodiment
With reference to embodiment, the present invention will be described in detail.
The present invention relates to the anti-car of tunnel face flexible energy to hit structure, and when vehicular sideview shock occurs, tunnel face anticollision is set
Apply and imported vehicle in tunnel by being oriented to, consuming energy, energy consumption can be realized when frontal impact occurs, reduces the effect of impact
Damage is reduced, safety guarantee is provided for tunnel face.Structure includes anti-the collision body energy consuming components and roller guidance set of front and rear assembling.
Anti- collision body energy consuming components include the anti-collision body 4 around vertical column 2 and column 2；Column 2 and anti-collision body 4 it
Between be provided with flexible energy element 6.Column 2 is square steel, its four sides are both provided with T-shaped plate；Flexible energy element 6 is by rubber
The prismatoid of glue shell and internal filling nano-fluid material composition, prismatoid end face are provided with the T-shaped of groove profile steel plate and column 2
Plate coordinates.Anti- collision body 4 is cylindrical in shape, and chamber, inside filling energy consumption core, surface steel plate are formed by composite material outside plate and partition plate
Parcel.Anti- 4 inner wall of collision body is used to connect with flexible energy element 6 with the pre-buried connection bolt 5 in 6 corresponding position of flexible energy element
Connect.
Roller guidance set includes the roller 9 outside vertical shaft 8 and shaft 8.It is provided with front side of anti-4 outer wall of collision body transversal
The vertical groove of face semicircular in shape；Shaft 8 is round steel pipe, and cylindrical hole is opened at 9 center of roller, and shaft 8 is arranged at anti-through roller 9
In the semicircle vertical groove of collision body 4.Roller 9 is made of the polyurethane of EVA shells and internal filling.The semicircle of anti-collision body 4
Vertical groove inner wall is provided with upper and lower two annulus holes for being used for positioning rotating shaft 8；Shaft 8 and the semicircle of anti-collision body 4 are vertical recessed
Horizontal spring 11 is provided between the annulus hole of groove inner wall.
Shaft 8 is parallel with column 2, is each perpendicular to road surface setting.2 bottom of column is embedded in below road surface fixed；2 He of column
8 bottom of shaft is both provided with the support base 10 for being used to support anti-collision body 4.Pillar cover is provided between the top of column 2 and anti-collision body 4
Plate 3；2 top of column is provided with column end cap 1, and 8 top of shaft is provided with shaft end cap 7.
The anti-left and right sides of collision body 4 is respectively arranged with circular arc flange and circular arc pit, and structure is hit for two neighboring anti-car
Snap-in location connects.
The above-mentioned anti-car of tunnel face flexible energy hits the installation method of structure, comprises the following steps：
Step 1：Foundation pit is dug to projected depth；
Step 2：Support base 10 and column 2 are installed, according to design buried depth and position, support base 10 is penetrated under column 2 in advance
Portion, is installed in place；
Step 3：Anti- collision body 4 is connected with being connected bolt 5 in advance with flexible energy element 6, along column 2 T-slot from top to bottom
Penetrate, and be landed on support base 10；
Step 4：Roller 9 is placed in the semicircle vertical groove of anti-collision body 4, and centering circular hole；
Step 5：Shaft 8 is penetrated into annulus hole, shaft hole, lower annulus hole on anti-collision body 4 from top to bottom, and is threaded into branch
Support in 10 circular hole of seat；
Step 6：Column cover board 3 is installed on the anti-top of collision body 4 and is fixed with column 2；
Step 7：Column end cap 1 and shaft end cap 7 are installed successively, fixed respectively with column 2 and shaft 8；
Step 8：According to demand, on the one hand repeat step one to seven, between two neighboring anti-collision facility is determined by column spacing
Position, still further aspect is customized by way of flange occlusion, it is possible to achieve the installation of different length, meets requirement.Due to
It is arc surface contact, therefore overall alignment can be in line type, arc-shaped or waveform as needed.
Present disclosure is not limited to cited by embodiment, and those of ordinary skill in the art are by reading description of the invention
And any equivalent conversion taken technical solution of the present invention, it is that claim of the invention is covered.
Claims (10)
1. flexible energy anti-car in tunnel face hits structure, it is characterised in that：
Anti- collision body energy consuming components and roller guidance set including front and rear assembling；
Anti- collision body energy consuming components include vertical column（2）And column（2）The anti-collision body of surrounding（4）；
Roller guidance set includes vertical shaft（8）And shaft（8）Outer roller（9）.
2. flexible energy anti-car in tunnel face according to claim 1 hits structure, it is characterised in that：
Column（2）With anti-collision body（4）Between be provided with flexible energy element（6）.
3. flexible energy anti-car in tunnel face according to claim 2 hits structure, it is characterised in that：
Column（2）For square steel, its four sides are both provided with T-shaped plate；
Flexible energy element（6）The prismatoid being made of rubbery outer cover and internal filling nano-fluid material, prismatoid end face
It is provided with groove profile steel plate and column（2）T-shaped plate coordinate.
4. flexible energy anti-car in tunnel face according to claim 2 hits structure, it is characterised in that：
Anti- collision body（4）It is cylindrical in shape, chamber, inside filling energy consumption core, surface steel plate are formed by composite material outside plate and partition plate
Parcel；
Anti- collision body（4）Inner wall and flexible energy element（6）The corresponding pre-buried connection bolt in position（5）For with flexible energy element
（6）Connection.
5. flexible energy anti-car in tunnel face according to claim 4 hits structure, it is characterised in that：
Anti- collision body（4）The vertical groove of cross section semicircular in shape is provided with front side of outer wall；
Shaft（8）For round steel pipe, roller（9）Open cylindrical hole, shaft in center（8）Through roller（9）It is arranged at anti-collision body（4）'s
In semicircle vertical groove.
6. flexible energy anti-car in tunnel face according to claim 5 hits structure, it is characterised in that：
Anti- collision body（4）Semicircle vertical groove inner wall be provided with up and down two be used for positioning rotating shaft（8）Annulus hole；
Shaft（8）With anti-collision body（4）Semicircle vertical groove inner wall annulus hole between be provided with horizontal spring（11）.
7. flexible energy anti-car in tunnel face according to claim 1 hits structure, it is characterised in that：
Column（2）Bottom is embedded in below road surface fixed；
Column（2）And shaft（8）Bottom, which is both provided with, is used to support anti-collision body（4）Support base（10）.
8. flexible energy anti-car in tunnel face according to claim 1 hits structure, it is characterised in that：
Column（2）Top and anti-collision body（4）Between be provided with column cover board（3）；
Column（2）Top is provided with column end cap（1）, shaft（8）Top is provided with shaft end cap（7）.
9. flexible energy anti-car in tunnel face according to claim 1 hits structure, it is characterised in that：
Anti- collision body（4）The left and right sides is respectively arranged with circular arc flange and circular arc pit, and stinging for structure is hit for two neighboring anti-car
Conjunction is located by connecting.
10. flexible energy anti-car in tunnel face hits the installation method of structure, it is characterised in that：
Comprise the following steps：
Step 1：Foundation pit is dug to projected depth；
Step 2：Support base is installed（10）And column（2）, according to design buried depth and position, by support base（10）Penetrate in advance vertical
Column（2）Lower part, is installed in place；
Step 3：By anti-collision body（4）With flexible energy element（6）In advance with being connected bolt（5）Connection, along column（2）T-slot
Penetrate from top to bottom, and be landed in support base（10）On；
Step 4：By roller（9）It is placed on anti-collision body（4）In semicircle vertical groove, and centering circular hole；
Step 5：By shaft（8）Anti- collision body is penetrated from top to bottom（4）Upper annulus hole, shaft hole, lower annulus hole, and screw thread revolves
Enter support base（10）In circular hole；
Step 6：By column cover board（3）It is installed on anti-collision body（4）Top and and column（2）It is fixed；
Step 7：Column end cap is installed successively（1）With shaft end cap（7）, respectively with column（2）And shaft（8）It is fixed；
Step 8：According to demand, repeat step one to seven, two neighboring anti-car hit structure between be on the one hand by column spacing
Positioning, still further aspect is positioned by way of flange occlusion；
Overall alignment as needed is in line type, arc-shaped or waveform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711239020.4A CN108018808B (en) | 2017-11-30 | 2017-11-30 | Flexible energy-dissipation car collision prevention structure of tunnel portal and mounting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711239020.4A CN108018808B (en) | 2017-11-30 | 2017-11-30 | Flexible energy-dissipation car collision prevention structure of tunnel portal and mounting method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108018808A true CN108018808A (en) | 2018-05-11 |
| CN108018808B CN108018808B (en) | 2024-01-09 |
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ID=62077712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711239020.4A Active CN108018808B (en) | 2017-11-30 | 2017-11-30 | Flexible energy-dissipation car collision prevention structure of tunnel portal and mounting method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108018808B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108774977A (en) * | 2018-07-23 | 2018-11-09 | 芜湖市轩恒广告传媒有限公司 | A kind of traffic route anticollision bucket |
| CN109024392A (en) * | 2018-07-16 | 2018-12-18 | 西安中交土木科技有限公司 | Anti-collision energy absorption structure |
| CN112030826A (en) * | 2020-08-28 | 2020-12-04 | 陕西小保当矿业有限公司 | Nanometer energy-absorbing safety device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050055569A (en) * | 2003-12-08 | 2005-06-13 | 주식회사 에이브이티 | Soundproof wall of using friction damper |
| KR100619545B1 (en) * | 2006-02-15 | 2006-09-07 | (주)다산컨설턴트 | The buffer installed in the inside of a tunnel |
| CN201406659Y (en) * | 2009-05-13 | 2010-02-17 | 中交第一公路勘察设计研究院有限公司 | Flexible energy dissipating car collision proof safe device used for bridge pier and provided with hollow packing structure |
| CN203066005U (en) * | 2012-12-06 | 2013-07-17 | 长安大学 | Guiding anti-collision pier |
| CN204570542U (en) * | 2015-07-03 | 2015-08-19 | 黄贺明 | A kind of traffic highway anticollision barrier wall |
| CN204940176U (en) * | 2015-09-16 | 2016-01-06 | 邵宝峰 | Highway bridge rolling-type anticollision device |
| CN207646658U (en) * | 2017-11-30 | 2018-07-24 | 西安中交土木科技有限公司 | A kind of anti-vehicle of tunnel face flexible energy hits structure |
-
2017
- 2017-11-30 CN CN201711239020.4A patent/CN108018808B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050055569A (en) * | 2003-12-08 | 2005-06-13 | 주식회사 에이브이티 | Soundproof wall of using friction damper |
| KR100619545B1 (en) * | 2006-02-15 | 2006-09-07 | (주)다산컨설턴트 | The buffer installed in the inside of a tunnel |
| CN201406659Y (en) * | 2009-05-13 | 2010-02-17 | 中交第一公路勘察设计研究院有限公司 | Flexible energy dissipating car collision proof safe device used for bridge pier and provided with hollow packing structure |
| CN203066005U (en) * | 2012-12-06 | 2013-07-17 | 长安大学 | Guiding anti-collision pier |
| CN204570542U (en) * | 2015-07-03 | 2015-08-19 | 黄贺明 | A kind of traffic highway anticollision barrier wall |
| CN204940176U (en) * | 2015-09-16 | 2016-01-06 | 邵宝峰 | Highway bridge rolling-type anticollision device |
| CN207646658U (en) * | 2017-11-30 | 2018-07-24 | 西安中交土木科技有限公司 | A kind of anti-vehicle of tunnel face flexible energy hits structure |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109024392A (en) * | 2018-07-16 | 2018-12-18 | 西安中交土木科技有限公司 | Anti-collision energy absorption structure |
| CN108774977A (en) * | 2018-07-23 | 2018-11-09 | 芜湖市轩恒广告传媒有限公司 | A kind of traffic route anticollision bucket |
| CN112030826A (en) * | 2020-08-28 | 2020-12-04 | 陕西小保当矿业有限公司 | Nanometer energy-absorbing safety device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108018808B (en) | 2024-01-09 |
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