CN204060775U - Railway tunnel protective door shock wave attenuation constructs - Google Patents
Railway tunnel protective door shock wave attenuation constructs Download PDFInfo
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- CN204060775U CN204060775U CN201420373699.1U CN201420373699U CN204060775U CN 204060775 U CN204060775 U CN 204060775U CN 201420373699 U CN201420373699 U CN 201420373699U CN 204060775 U CN204060775 U CN 204060775U
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- door
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- door leaf
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- 230000035939 shock Effects 0.000 title claims abstract description 66
- 230000001681 protective effect Effects 0.000 title claims abstract description 30
- 239000011148 porous material Substances 0.000 claims abstract description 6
- 238000004088 simulation Methods 0.000 description 13
- 238000004458 analytical method Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 239000002360 explosive Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000004880 explosion Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
Railway tunnel protective door shock wave attenuation constructs, and penetrates into door leaf shock wave pressure behind effectively to cut down by lower crack between a door and its frame, guarantees the safety of personnel after door leaf.Protective door comprises door leaf, and described door leaf bottom surface is provided with at least one groove along its thickness direction, and this groove extends continuously along door leaf width or interval extends.Described groove inner wall is fixedly installed porous material filling layer.
Description
Technical field
The utility model relates to protective door, a kind of especially structure of the protective door shock wave attenuation for railway tunnel Rescue Station, transverse passage-way, emergency exit or refuge.
Background technology
In recent years, western mountainous areas has emerged a large amount of extra-long railway tunnel, when length of tunnel is greater than 20km, need arrange Rescue Station, transverse passage-way, emergency exit or refuge in tunnel trunk.For isolation burning things which may cause a fire disaster, flue gas, explosion wave etc., protective door should be set, and protective door should have certain antiknock and fireproof performance.
The relevant regulations of " railway engineering design fire code " (TB10063-2007) and " railway tunnel Fire prevention evacuate engineering design code " (TB10020-2012) has: " length 5.0km and above staff in tunnel evacuate mouth and equipment cavern all should arrange the protective door that fire endurance is not less than 3.0h ", " transverse passage-way two ends all should be opened to evacuation direction for the protective door evacuated, and must not threshold be set ", " the antiknock load of mixed passenger and freight railway tunnel protection door should not be less than 0.10MPa, the antiknock load of Tunnel of Passenger Dedicated Railway Line protective door should not be less than 0.05MPa ".As can be seen here, due to the application circumstances of railway tunnel, railway tunnel protective door meets the related request of labeled door, blast-resistant door and egress door simultaneously.
Though current country is temporarily without blast-resistant door relevant design standard, for meeting antiknock requirement, fully ensure that personnel are not by the impact of explosion wave behind the door, the blast-resistant door on market all adopts hermetic design, namely must not arrange crack between a door and its frame.But because fire escape protective door must not arrange the requirement of threshold, railway tunnel rescue station protective door certainly exists lower crack between a door and its frame.According to the relevant regulations of labeled door, for preventing flame to be penetrated into the fiery face of the back of the body, the lower crack between a door and its frame of labeled door must not more than 9mm.Simultaneously in order to ensure the normal keying of door, the lower crack between a door and its frame of labeled door presses 9mm design usually.
In sum, railway tunnel protective door is a kind of antiknock egress door that there is lower crack between a door and its frame, and lower crack between a door and its frame is no more than 9mm.Therefore, be necessary that the damage of shock wave peak pressure to human body lower crack between a door and its frame being penetrated into a back side is studied, to determine the necessity adopting lower crack between a door and its frame specially treated.
According to simulation analysis, at door leaf thickness 100mm, lower crack between a door and its frame height 9mm, explosive payload is 0.51kg, when the quick-fried heart is apart from door leaf 2m, the peak value of shock wave overpressure of generation is: 0.129MPa in the middle part of door leaf, crack between a door and its frame entrance 0.168MPa, 15cm place 15.8KPa behind the door, behind the door 18cm place 13.8KPa.And the casualty ranking provided according to " safe distance of Under Blast Air Shock servant " and superpressure relation, the minimum threshold values of positive pressure of shock wave to injury of human is 13.73kPa, and the shock wave peak pressure descending crack between a door and its frame to penetrate into a back side as can be seen here will cause certain damage to human body.Therefore, existing blast-resistant door, labeled door all can not meet the requirement of railway tunnel protective door.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of railway tunnel protective door shock wave attenuation structure, penetrates into door leaf shock wave pressure behind effectively to cut down by lower crack between a door and its frame, guarantees the safety of personnel after door leaf.
It is as follows that the utility model solves the technical scheme that its technical problem adopts:
Railway tunnel protective door shock wave attenuation structure of the present utility model, comprises door leaf, it is characterized in that: described door leaf bottom surface is provided with at least one groove along its thickness direction, and this groove extends continuously along door leaf width or interval extends.
Described groove inner wall is fixedly installed porous material filling layer.
The beneficial effects of the utility model are, effectively can cut down and penetrate into door leaf shock wave pressure behind by lower crack between a door and its frame, the positive pressure of shock wave attenuating at ground proximity place is about 2 ~ 3 times, and shock wave attenuation amount more than ground is more obvious, and attenuating is more than 10 times; Structure is simple, and it is convenient to implement, and channel-section steel can be adopted to be welded in bottom door leaf, without the need to adopting special structure design for steel blast-resistant door.
Accompanying drawing explanation
This manual comprises following five width accompanying drawings:
Fig. 1 is the profile of the utility model railway tunnel protective door shock wave attenuation structure;
Fig. 2 is the figure that faces upward of the utility model railway tunnel protective door shock wave attenuation structure;
Fig. 3 is the figure that faces upward of the utility model railway tunnel protective door shock wave attenuation structure;
Fig. 4 is the enlarged diagram of the utility model railway tunnel protective door shock wave attenuation structure;
Fig. 5 is the enlarged diagram of the utility model railway tunnel protective door shock wave attenuation structure;
Component shown in figure, position and corresponding mark: door leaf 10, channel-section steel 20, groove 21, porous material filling layer 30.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is further illustrated.
With reference to Fig. 1 and Fig. 4, railway tunnel protective door shock wave attenuation structure of the present utility model, comprise door leaf 10, this door leaf 10 bottom surface is provided with at least one groove 21 along its thickness direction.Because explosion wave has stronger diversity, when shock wave enters groove 21 by lower crack between a door and its frame, it is inner that shock wave will be diffused into groove 21, and part shock wave penetrates into next stage groove 21 further by lower crack between a door and its frame, and shock wave finally a small amount of thus arrives afterbody groove 21.In addition, shock wave in groove 21 inside, through reflection, part shock wave also will be had to arrive next stage groove 21, but surge pressure reduces greatly, and stagger, so stronger shock wave pressure can not be formed with the action time of the shock wave peak pressure previously arrived.
As shown in Figure 2, this groove 21 extends continuously along door leaf 10 width.As shown in Figure 3, this groove 21 also can extend along door leaf 10 width interval.
With reference to Fig. 5, described groove 21 inwall is fixedly installed porous material filling layer 30, with absorption portion shock wave, the shock wave after making to penetrate into door leaf 10 or in next stage groove 21 is further cut down.Porous material can adopt the materials such as foamed aluminium.
With reference to Fig. 4 and Fig. 5, groove 21 or by being formed at shapes such as door leaf 10 bottom surface welding channel-section steels, therefore carry out special structure design to protective door without the need to adopting, has the simple and enforcement of structure and facilitates advantage.
Simulation analysis result is as follows:
One, shock wave attenuation Contrast on effect is analyzed
1, model
Model 1 is traditional antiknock escape, door leaf size: height 2000mm, width 1500mm, thickness 100mm, lower crack between a door and its frame height 9mm.
Model 2 is for having the protective door of the utility model shock wave attenuation structure, door leaf size: height 2000mm, width 1500mm, thickness 100mm, lower crack between a door and its frame height 9mm.Door leaf bottom recesses is of a size of: height 100mm, width 160mm.
Emulation adopts bomb (TNT) and air bi-material, and explosion wave is produced by TNT, and propagates in atmosphere, and the face belonging to blast-resistant door adopts rigid face (that is, normal direction displacement is zero).
2, emulation tool
Select large-scale general explicit finite meta software LS-DYNA as computational tool.The simulation of LS-DYNA to air-shock wave propagation law comprises complicated physics, the chemical process such as decay of the detonating of TNT explosive, formation that detonation involves air-shock wave and propagation, shock wave.
3, simulation result and analysis
The analysis of simulation result of 3-1 pressure cloud atlas
1., during 1.2ms, propagate in the air of shock wave between explosive and door;
2., during 1.9ms, shock motion is to door leaf;
3. during 2.1ms, due to the shock reflection effect of ground and door leaf, larger shock wave pressure is formed at crack between a door and its frame place;
4. during 2.5ms, shock motion, in crack between a door and its frame, can be found out by comparison diagram, and the shock wave pressure of model 1 is obviously greater than model 2;
5., during 2.9ms, the shock wave of model 1 is passed to crack between a door and its frame dorsal part through crack between a door and its frame, and most of shock wave of model 2 is absorbed by door leaf groove;
6., during 4.55ms, the shock wave of model 1 is in the diffusion of door leaf dorsal part, and the shock wave of model 2 mainly acts on door leaf groove.
3-2 positive pressure of shock wave simulation result
Positive pressure of shock wave contrasts
Analysis of simulation result:
1. in the middle part of door leaf
The explosive dose that this emulation adopts is about: 16cm*16cm*16cm*1.2g/cm
3=4.9kg, door leaf is about 2m apart from explosive distance.According to theoretical calculation formula, show that in the middle part of door leaf, positive pressure of shock wave should be 0.69MPa.Theory calculate differs with simulation calculation and is about 8%, substantially meets.
More than calculate the correctness demonstrating simulation model and Simulation Parameters.
2. crack between a door and its frame entrance
Model 1 is all greater than in the middle part of door leaf, mainly because the reflex on door leaf and ground causes with the surge pressure of the crack between a door and its frame entrance of model 2.
As can be seen from the pressure curve of model 2, there are 3 crests in crack between a door and its frame inlet pressure curve, surge pressure is respectively 0.73MPa, 0.96MPa and 0.8MPa, and the action time of peak value 0.73MPa all conforms to model 1 with force value.Can find out, peak value 0.73MPa causes due to first reflection, and peak value 0.96MPa and 0.8MPa causes by the groove reflection of model 2.
3. crack between a door and its frame outlet
The crack between a door and its frame outlet surge pressure of model 2 is 0.89MPa, although be only slightly less than the 0.99MPa of model 1, but reduced pressure cloud atlas can be found out, model 2 crack between a door and its frame outlet surge pressure mainly by groove reflection to exit, therefore action direction is mainly perpendicular to direction, ground, and after opposite house, shock effect is less.
4. 20cm, 40cm place behind the door
By contrast, can find out, the door dorsal part shock wave pressure peak value of model 1 is 125kPa and 103kPa, and the shock wave pressure peak value of model 2 is 56kPa and 32kPa.Therefore, can reach a conclusion, the shock wave attenuation effect of model 2 is better, and its attenuation is about 2 ~ 3 times of model 1.
5. apart from door leaf dorsal part 0.5m, high 0.5m place
By contrast, can find out, the door dorsal part shock wave pressure peak value of model 1 is 29kPa, and the shock wave pressure peak value of model 2 is 1.8kPa.Therefore, can reach a conclusion, the shock wave attenuation effect of model 2 is better, and its attenuation is about 16 times of model 1.
4, conclusion
1. drawn by simulation analysis, adopt the blast-resistant door of groove design, door leaf groove absorbs a large amount of shock waves, and a part is in inside grooves consumption, and a part is reflected back on front side of door leaf;
2. adopt the blast-resistant door shock wave attenuation effect of groove design better, be about 2 ~ 3 times near ground place attenuation; Better for ground above region decay effect, be about 16 times;
If 3. increase foamed aluminium at groove inner wall, for absorbing shock wave, its shock wave attenuation effect will be more obvious.
Two, multistage decay and the comparative analysis of single-stage attenuating
1, model
Model 3 is for having the protective door of the utility model shock wave attenuation structure, door leaf size: height 2000mm, width 1500mm, thickness 100mm, lower crack between a door and its frame height 9mm.Arrange a groove in door leaf bottom surface, groove is of a size of: height 100mm, width 160mm.
Model 4 is for having the protective door of the utility model shock wave attenuation structure, door leaf size: height 2000mm, width 1500mm, thickness 100mm, lower crack between a door and its frame height 9mm.Arrange two grooves in door leaf bottom surface, groove is of a size of: height 100mm, width 2*70mm.
2, analysis of simulation result
2-1 shock wave peak pressure
3, conclusion
1. can be drawn by analysis of simulation result, after adopting two-stage decay, shock wave attenuation successful is better than single-stage decay;
2. by that analogy, if set up multistage decay, the shock wave peak pressure through crack between a door and its frame will be decayed further.
Claims (2)
1. railway tunnel protective door shock wave attenuation structure, comprise door leaf (10), it is characterized in that: described door leaf (10) bottom surface is provided with at least one groove (21) along its thickness direction, this groove (21) extends continuously along door leaf (10) width or interval extends.
2. railway tunnel protective door shock wave attenuation structure as claimed in claim 1, is characterized in that: described groove (21) inwall is fixedly installed porous material filling layer (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420373699.1U CN204060775U (en) | 2014-07-07 | 2014-07-07 | Railway tunnel protective door shock wave attenuation constructs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420373699.1U CN204060775U (en) | 2014-07-07 | 2014-07-07 | Railway tunnel protective door shock wave attenuation constructs |
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| Publication Number | Publication Date |
|---|---|
| CN204060775U true CN204060775U (en) | 2014-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420373699.1U Expired - Fee Related CN204060775U (en) | 2014-07-07 | 2014-07-07 | Railway tunnel protective door shock wave attenuation constructs |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100294A (en) * | 2014-07-07 | 2014-10-15 | 中铁二院工程集团有限责任公司 | Shock wave attenuation structure of protective door of railway tunnel |
-
2014
- 2014-07-07 CN CN201420373699.1U patent/CN204060775U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100294A (en) * | 2014-07-07 | 2014-10-15 | 中铁二院工程集团有限责任公司 | Shock wave attenuation structure of protective door of railway tunnel |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141231 |