CN108915753B - The short-track length bounding method in tunnel for Extra-long Highway Tunnel circulating ventilation system - Google Patents
The short-track length bounding method in tunnel for Extra-long Highway Tunnel circulating ventilation system Download PDFInfo
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- CN108915753B CN108915753B CN201810903617.2A CN201810903617A CN108915753B CN 108915753 B CN108915753 B CN 108915753B CN 201810903617 A CN201810903617 A CN 201810903617A CN 108915753 B CN108915753 B CN 108915753B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/003—Ventilation of traffic tunnels
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
Abstract
The invention discloses a kind of short-track length bounding method in tunnel for Extra-long Highway Tunnel circulating ventilation system, include the following steps: the distinguished and admirable dust concentration of the parallel connection for 1) calculating recirculating air flow；2) the short-track length extreme value in tunnel is calculated.The short-track length extreme value calculation formula in tunnel shows that when the short-track length in tunnel length extreme value short-track equal to or more than tunnel, the short-track distinguished and admirable dust concentration of parallel connection in tunnel is more than acceptable concentration, and the vehicle travelled in tunnel is short-track is dangerous.The present invention can be used for the determination of the short-track length extreme value in tunnel of Extra-long Highway Tunnel circulating ventilation system, it is avoided that length of tunnel, section scale etc. have the troublesome calculation of dimensions number parameter, or ventilating system network resolves, or numerous and jumbled time-consuming computational fluid dynamics numerical simulation, it is faster to determine the short-track length extreme value in tunnel, it is ensured that the safety of traveling vehicle in tunnel.
Description
Technical field
The invention belongs to tunnel hazard prevention mitigation technical fields, and in particular to one kind is used for Extra-long Highway Tunnel circulating ventilation system
The short-track length bounding method in the tunnel of system.
Background technique
Vcehicular tunnel is half sunken or shallow embedding long and narrow space, administers the dirts such as flue dust caused by the automobile travelled in tunnel
Object is contaminated, is always the major issue of industry concern.The general method for using force ventilation dilutes the pollutants such as flue dust and CO, dirty
Wind drains into tunnel external environment, and belongs to direct air system scheme.The ventilating system of long range or speciality apart from vcehicular tunnel,
Air shaft must be cooperated, be just able to satisfy the use wind demand for diluting pollutant in tunnel.Extra-long Highway Tunnel ventilation is specifically related to
The optimization of the influence factors such as shaft excavation position, ventilation blower, jet blower group and air duct is the advanced problems in industry.
Currently, extraneous fresh air is introduced tunnel, then the pollutant of dilution vehicle discharge waste air is discharged outside hole,
This is the high conventional tunnel ventilation of energy consumption.Using vertical shaft air zoning, extraneous fresh air is introduced, the dirt in super long tunnel is diluted
Object is contaminated, and ensures its concentration within safety value, finally, waste air is discharged by segmentation vertical shaft；The practice such as Kwa G S and Xia Yongxu
Common vertical shaft is segmented supply and exhaust Tunnel Ventilation Systems.For the traffic air that tunnel middle rolling car is formed, Fang Lei and Wang etc. are answered
With the method for model test, show that air outlet and tunnel direction of traffic preferably take 6 °, and the folder of exhaust outlet and tunnel direction of traffic
Angle should be not more than 30 °；Then, Fang Lei etc. explicitly points out ventilation shaft longitudinal pressure-suction ventilation system and always exists civil engineering costs and fortune
Capable the problem of energy consumption is high.For ventilation shaft project cost is high or super long tunnel without setting condition, the ventilation of upper and lower line is utilized
The uneven characteristic of load, Berner etc. have been put forward for the first time double hole complementation ventilations；Using model experiment and numerical simulation, Zhang Guangpeng is tested
Design parameter is demonstrate,proved and has checked, and the complementary ventilatory applications in double holes in silk screen tunnel；It is surveyed by experiment, Wang Yaqiong etc. is deep
Enter the tunnel flow field having studied under double complementary ventilations in hole, further demonstrates the feasibility of the draft type, and general
In the case of double hole complementation draft types be suitable for the vcehicular tunnel of 4km~7km.The at high cost and vertical shaft but super long tunnel is divulged information
The problems such as position is restricted by geology, urban planning is excavated, is still protruded, and is used for Extra-long Highway Tunnel Controlled Recirculation Ventilation tunnel
The bounding method of the short-track length in road is not yet formed.
Summary of the invention
To solve the above-mentioned problems, the present invention one kind is provided being capable of faster completion Extra-long Highway Tunnel circulating ventilation system
The short-track length bounding method in the tunnel for Extra-long Highway Tunnel circulating ventilation system for the Pre-Evaluation that system is implemented.
The technical solution adopted by the present invention is that: a kind of short-track length in tunnel for Extra-long Highway Tunnel circulating ventilation system
Bounding method, the Extra-long Highway Tunnel circulating ventilation system include circulation air path, adjustable accessory structure；Adjustable accessory structure
Including the exhaust air shaft and air-supply vertical shaft being connected to circulation air path；The by-pass tunnel in tunnel is arranged in the circulation air path, follows
The both ends in ring air duct pass through air inducing section respectively and injection section is connected to tunnel；Deduster is equipped in the circulation air path；Tunnel
Entrance is to being partially upstream tunnels between air inducing section, and the part between air inducing section and injection section is that tunnel is short-track, injection section and tunnel
Part between road outlet is downstream tunnels；
Include the following steps:
1) the distinguished and admirable dust concentration of the parallel connection of recirculating air flow is calculated:
According to basic physics theory, distinguished and admirable dust concentration in parallel is added on the basis of the distinguished and admirable dust concentration in upstream
Newly-increased dust concentration in tunnel is short-track, then distinguished and admirable dust concentration calculating formula such as formula (1) in parallel:
In formula: δ2For distinguished and admirable dust concentration in parallel, m-1；δ1For the distinguished and admirable dust concentration in upstream, m-1；C is flue dust flow
Integrated contributory factor, m/s；LsFor the short-track length in the tunnel of circulation air path, m；E is to divide wind ratio, dimensionless number；QrFor from tunnel
The extraneous fresh air volume that road entrance introduces, m3/s；
2) the short-track length extreme value in tunnel is calculated:
A) the flue dust acceptable concentration of Ventilation Design for Tunnels is set as δ, when meeting δ1<δ2When≤δ, then meet wanting for Design of ventilation
It asks, by formula (1), obtains formula (2):
In formula: δ is the flue dust acceptable concentration of Design of ventilation, m-1；
B) in formula (2), when the short-track length in tunnel reaches the short-track length extreme value in tunnel, δ2=δ, and use LscReplace Ls,
The short-track length extreme value determining type in tunnel is then obtained, such as formula (3):
In formula: LscThe short-track length extreme value in tunnel, m；
Formula (3) shows that, when the short-track length in tunnel length extreme value short-track greater than tunnel, the short-track parallel connection in tunnel is distinguished and admirable
Dust concentration is more than acceptable concentration, and the vehicle travelled in tunnel is short-track is dangerous.
In the above-mentioned short-track length bounding method in the tunnel for Extra-long Highway Tunnel circulating ventilation system, formula (1)
Determine that method is as follows:
A) general formula of flue dust flow such as formula (5) in vcehicular tunnel:
In formula: QVIFor tunnel flue dust flow, m2/s；qVIFor flue dust Criterion emission amount, m2/(veh·km)；fa(VI)To consider
The vehicle condition coefficient of flue dust, dimensionless number；fdFor vehicle flow density factor, dimensionless number；fh(VI)For consider flue dust Altitude effects,
Dimensionless number；fiv(VI)For the longitudinal slope-speed coefficient for considering flue dust, dimensionless number；nDFor diesel vehicle vehicle classification number, dimensionless
Number；NmFor the volume of traffic of corresponding vehicle, veh/h；fm(VI)For the diesel vehicle vehicle coefficient for considering flue dust, dimensionless number；L is tunnel
Length, m；
B) in formula (5), when Criterion emission amount is constant and vehicle condition, Che Midu, the gradient, speed, diesel vehicle vehicle without
Dimensions number is constant, and in the case where capable of ignoring and influencing produced by altitude change, then flue dust flow in tunnel is length of tunnel and flue dust
The function of the integrated contributory factor of flow；Wherein, the calculation formula of the integrated contributory factor of flue dust flow such as formula (6):
C) concrete application formula (6) obtain the distinguished and admirable dust concentration calculating formula such as formula (7) in upstream:
In formula: L1For the length of upstream tunnels, m；
D) divide the calculating of wind ratio:
Wind ratio is divided to determine by formula (8):
In formula: Q is the distinguished and admirable air quantity for branching to circulation air path air inducing section, m3/s；
According to the principle of mass conservation, then the calculation formula such as formula (9) of the distinguished and admirable air quantity of the short-track middle parallel connection in tunnel:
Qs=(1-e) Qr (9)
In formula: QsFor the short-track distinguished and admirable air quantity of parallel connection in tunnel, m3/s；
E) the distinguished and admirable dust concentration of the short-track parallel connection in tunnel calculates:
The distinguished and admirable flue dust of the short-track parallel connection in tunnel comes from two parts, first, upstream is distinguished and admirable to carry the flue dust to come；Second,
The fume amount of the vehicle discharge and generation of short-track interior traveling in tunnel；Wherein, the short-track distinguished and admirable flue dust flow of parallel connection in tunnel is influenced
The distinguished and admirable carrying amount in upstream by formula (10) determine:
Qs1(VI)=δ1Qs (10)
In formula: Qs1(VI)For the flue dust flow distinguished and admirable from upstream, m2/s；
Formula (9) are substituted into formula (10), obtain formula (11):
Qs1(VI)=δ1(1-e)Qr (11)
In addition, the vehicle in the short-track interior traveling in tunnel discharges and the fume amount of formation calculates, such as formula (12):
Qs2(VI)=CLs (12)
In formula: Qs2(VI)For tunnel it is short-track parallel connection it is distinguished and admirable in increase newly flue dust flow, m2/s；
It is distinguished and admirable to obtain the short-track parallel connection in tunnel using formula (9), (11) and formula (12) according to basic physics theory
Dust concentration calculate formula (1):
Compared with prior art, the beneficial effects of the present invention are:
The present invention can be used for the determination of the short-track length extreme value in tunnel of Extra-long Highway Tunnel circulating ventilation system, be avoided that tunnel
Road length, section scale etc. have the troublesome calculation of dimensions number parameter, and perhaps ventilating system network resolves or numerous and jumbled time-consuming meter
Fluid operator dynamic numerical simulation, it is faster to determine the short-track length extreme value in tunnel, it is ensured that the peace of traveling vehicle in tunnel
Entirely.
Detailed description of the invention
The structural schematic diagram for the Extra-long Highway Tunnel circulating ventilation system that Fig. 1 is applicable in for the present invention.
The wind-flow pattern for the Extra-long Highway Tunnel circulating ventilation system that Fig. 2 is applicable in for the present invention.
Fig. 3 is curve graph (the fresh distinguished and admirable air quantity of influence of the upstream because of no-load voltage ratio number to the short-track limitation of length value in tunnel
300m3/ s is designed because of no-load voltage ratio number 0.1m2/s)。
Fig. 4 is curve graph (the fresh distinguished and admirable air quantity of influence of the upstream because of no-load voltage ratio number to the short-track limitation of length value in tunnel
300m3/ s is designed because of no-load voltage ratio number 0.2m2/s)。
Fig. 5 is curve graph (the fresh distinguished and admirable air quantity of influence of the upstream because of no-load voltage ratio number to the short-track limitation of length value in tunnel
400m3/ s is designed because of no-load voltage ratio number 0.1m2/s)。
Fig. 6 is curve graph (the fresh distinguished and admirable air quantity of influence of the upstream because of no-load voltage ratio number to the short-track limitation of length value in tunnel
400m3/ s is designed because of no-load voltage ratio number 0.2m2/s)。
In figure: A. is fresh distinguished and admirable, and the upstream B. is distinguished and admirable, is recirculating air flow between C and D, and the downstream E. is distinguished and admirable, and F. parallel connection is distinguished and admirable,
0. adjustable accessory structure, 1. tunnel portals, 2. upstream tunnels, 3. air inducing sections, 4. deduster entrances, 5. circulation air paths, 6. dedustings
Device outlet, 7. injection sections, 8. downstream tunnels, 9. tunnel exits, 10. tunnels are short-track, 11. dedusters.
Specific embodiment
Following further describes the present invention with reference to the drawings.
As depicted in figs. 1 and 2, Extra-long Highway Tunnel circulating ventilation system includes including circulation air path 5, adjustable accessory structure
0；Adjustable accessory structure includes the exhaust air shaft being connected to circulation air path and air-supply vertical shaft；The circulation air path 5 is arranged in tunnel
The by-pass tunnel in road, the both ends of circulation air path 5 pass through air inducing section 3 respectively and injection section 7 is connected to tunnel.The circulation air path
Deduster is equipped in 5.Tunnel portal 1 is to being partially upstream tunnels 2, portion between air inducing section 3 and injection section 7 between air inducing section 3
It is divided into tunnel short-track 10, the part between injection section 7 and tunnel exit 9 is downstream tunnels 8.
Extra-long Highway Tunnel circulating ventilation system is in use, introduce the fresh distinguished and admirable of tunnel external environment by tunnel portal 1
A flows through upstream tunnels 2, and constantly blending and the carrying pollutants such as flue dust and CO becomes the distinguished and admirable B in upstream.One in the distinguished and admirable B in upstream
Part flows into tunnel short-track 10, continues to dilute pollutant, becomes the distinguished and admirable F of parallel connection of recirculating air flow.The distinguished and admirable B warp in another part upstream
It crosses circulation air path and introduces section 3, flow into circulation air path 5, become recirculating air flow C-D.Recirculating air flow C flows into deduster entrance 4, is removing
Under the comprehensive function of the separation of dirt device 11, sedimentation and trapping, it is stripped of the particles pollutant such as flue dust, has obtained purified treatment, flowed
House outlet 6 out are converted into recirculating air flow D.
Common sections between the injection section 7 of circulation air path, tunnel short-track 10 and downstream tunnels 8, flow through circulation air path
The recirculating air flow D of injection section 7 completes to blend with the distinguished and admirable F in parallel for the recirculating air flow for flowing through tunnel short-track 10, is changed into lower urticaria
Flow E.Continue to dilute pollutant in the distinguished and admirable E of 8 middle and lower reaches of downstream tunnels, and ensures that the pollutant concentration in downstream tunnels 8 is maintained at
Within defined safety value, it is ensured that needed with wind.
Specific implementation step of the invention is as follows:
1) general formula of flue dust flow such as formula (5) in vcehicular tunnel:
In formula: QVIFor tunnel flue dust flow, m2/s；qVIFor flue dust Criterion emission amount, m2/(veh·km)；fa(VI)To consider
The vehicle condition coefficient of flue dust, dimensionless number；fdFor vehicle flow density factor, dimensionless number；fh(VI)For consider flue dust Altitude effects,
Dimensionless number；fiv(VI)For the longitudinal slope-speed coefficient for considering flue dust, dimensionless number；nDFor diesel vehicle vehicle classification number, dimensionless
Number；NmFor the volume of traffic of corresponding vehicle, veh/h；fm(VI)For the diesel vehicle vehicle coefficient for considering flue dust, dimensionless number；L is tunnel
Length, m；
2) in formula (5), when Criterion emission amount is constant and vehicle condition, Che Midu, the gradient, speed, diesel vehicle vehicle without
Dimensions number is constant, and in the case where capable of ignoring and influencing produced by altitude change, then flue dust flow in tunnel is length of tunnel and flue dust
The function of the integrated contributory factor of flow；Wherein, the calculation formula of the integrated contributory factor of flue dust flow such as formula (6):
In formula: C is the integrated contributory factor of flue dust flow, m/s；
3) concrete application formula (6) obtain the distinguished and admirable dust concentration calculating formula such as formula (7) in upstream:
In formula: δ1For the distinguished and admirable dust concentration in upstream, m-1；L1For the length of upstream tunnels, m；δ1For the distinguished and admirable flue dust in upstream
Concentration, m-1；QrFor the extraneous fresh air volume introduced from tunnel portal, m3/s；
4) divide the calculating of wind ratio:
Wind ratio is divided to determine by formula (8):
In formula: e is to divide wind ratio, dimensionless number；Q is the distinguished and admirable air quantity for branching to circulation air path air inducing section, m3/s；
According to the principle of mass conservation, then the calculation formula such as formula (9) of the distinguished and admirable air quantity of the short-track middle parallel connection in tunnel:
Qs=(1-e) Qr (9)
In formula: QsFor the short-track distinguished and admirable air quantity of parallel connection in tunnel, m3/s；
5) the distinguished and admirable dust concentration of the short-track parallel connection in tunnel calculates:
The distinguished and admirable flue dust of the short-track parallel connection in tunnel comes from two parts, first, upstream is distinguished and admirable to carry the flue dust to come；Second,
The fume amount of the vehicle discharge and generation of short-track interior traveling in tunnel；Wherein, the short-track distinguished and admirable flue dust flow of parallel connection in tunnel is influenced
The distinguished and admirable carrying amount in upstream by formula (10) determine:
Qs1(VI)=δ1Qs (10)
In formula: Qs1(VI)For the flue dust flow distinguished and admirable from upstream, m2/s；
Formula (9) are substituted into formula (10), obtain formula (11):
Qs1(VI)=δ1(1-e)Qr (11)
In addition, the vehicle in the short-track interior traveling in tunnel discharges and the fume amount of formation calculates, such as formula (12):
Qs2(VI)=CLs (12)
In formula: Qs2(VI)For tunnel it is short-track parallel connection it is distinguished and admirable in increase newly flue dust flow, m2/s；LsFor the short-track length in tunnel
Degree, m；
It is distinguished and admirable to obtain the short-track parallel connection in tunnel using formula (9), (11) and formula (12) according to basic physics theory
Dust concentration calculate formula (1):
In formula: δ2For distinguished and admirable dust concentration in parallel, m-1。
6) upstream tunnels length extreme value calculates:
If the flue dust acceptable concentration of Ventilation Design for Tunnels is δ, when meeting formula (13):
δ1<δ2≤δ (13)
Formula (1) is substituted into formula (13), obtains formula (2):
And if only if δ2When=δ, to meet Ventilation Design for Tunnels dust concentration requirement, then the short-track length in tunnel reaches one
Extreme value Lsc；L in formula (2)sReplace with Lsc, and obtained by formula (2) transposition:
In formula: LscFor the short-track length extreme value in tunnel, m；
Formula (3) shows: when the short-track length in tunnel length extreme value short-track greater than tunnel, downstream distinguished and admirable flue dust in parallel is dense
Degree is more than acceptable concentration, and the vehicle travelled in downstream tunnels are short-track is dangerous.
Formula (3) further are arranged, obtain formula (14):
In formula: c=C/ δ is the design of the integrated contributory factor and design concentration of flue dust flow because of no-load voltage ratio number, m2/s；c1=
C/δ1It is the integrated contributory factor of flue dust flow and the upstream of the distinguished and admirable dust concentration in upstream because of no-load voltage ratio number, m2/s；
Formula (14) shows: the short-track length extreme value in tunnel with divide wind ratio, design because no-load voltage ratio number is inversely proportional, the short-track length in tunnel
Extreme value is to upstream because no-load voltage ratio number, fresh distinguished and admirable air quantity are directly proportional.
Below for determine design because of no-load voltage ratio number, upstream because of no-load voltage ratio number, divide wind ratio and fresh distinguished and admirable air quantity short-track to tunnel long
The influence degree experiment embodiment of extreme value is spent, concrete operations are as follows:
A) setting fresh distinguished and admirable air quantity is respectively 300m3/ s and 400m3/s；
B) upstream is set because no-load voltage ratio number is 0.2m2/ s to 0.4m2/ s (fresh distinguished and admirable air quantity 300m3/ s) or upstream because of no-load voltage ratio number
For 0.1m2/ s to 0.2m2/ s (fresh distinguished and admirable air quantity 400m3/ s), and design because no-load voltage ratio number is respectively 0.1m2/ s and 0.2m2/s；
C) point wind is set than being respectively 0.30,0.45,0.60,0.75 and 0.90；
D) above-mentioned numerical value is substituted into formula (14) to calculate, acquired results are as shown in Figures 3 to 6.
By analyzing specific embodiment, following conclusion is made: 1. as upstream is because of the increase of no-load voltage ratio number, the short-track length in tunnel
Limiting value increases；As fresh distinguished and admirable air quantity increases, the short-track limitation of length value in tunnel increases；With wind is divided, than increasing, tunnel is short
Road length limiting value reduces.2. the present invention provides the calculation methods of the short-track limiting value in tunnel.
Claims (1)
1. a kind of short-track length bounding method in tunnel for Extra-long Highway Tunnel circulating ventilation system, the speciality highway tunnel
Road circulating ventilation system includes circulation air path, adjustable accessory structure；Adjustable accessory structure includes the air draft being connected to circulation air path
Vertical shaft and air-supply vertical shaft；The by-pass tunnel in tunnel is arranged in the circulation air path, and the both ends of circulation air path pass through air inducing respectively
Section and injection section are connected to tunnel；Deduster is equipped in the circulation air path；Tunnel portal between air inducing section partially to be upper
Tunnel is swum, the part between air inducing section and injection section is that tunnel is short-track, and the part between injection section and tunnel exit is downstream tunnel
Road；
Include the following steps:
1) the distinguished and admirable dust concentration of the parallel connection of recirculating air flow is calculated:
According to basic physics theory, distinguished and admirable dust concentration in parallel is on the basis of the distinguished and admirable dust concentration in upstream plus tunnel
Newly-increased dust concentration in short-track, then distinguished and admirable dust concentration calculating formula such as formula (1) in parallel:
In formula: δ2For distinguished and admirable dust concentration in parallel, m-1；δ1For the distinguished and admirable dust concentration in upstream, m-1；C is the comprehensive of flue dust flow
Close impact factor, m/s；LsFor the short-track length in the tunnel of circulation air path, m；E is to divide wind ratio, dimensionless number；QrTo enter from tunnel
The extraneous fresh air volume that mouth introduces, m3/s；
The determination method of formula (1) is as follows:
A) general formula of flue dust flow such as formula (5) in vcehicular tunnel:
In formula: QVIFor tunnel flue dust flow, m2/s；qVIFor flue dust Criterion emission amount, m2/(veh·km)；fa(VI)To consider flue dust
Vehicle condition coefficient, dimensionless number；fdFor vehicle flow density factor, dimensionless number；fh(VI)It is immeasurable for the Altitude effects for considering flue dust
Guiding principle number；fiv(VI)For the longitudinal slope-speed coefficient for considering flue dust, dimensionless number；nDFor diesel vehicle vehicle classification number, dimensionless number；Nm
For the volume of traffic of corresponding vehicle, veh/h；fm(VI)For the diesel vehicle vehicle coefficient for considering flue dust, dimensionless number；L is length of tunnel,
m；
B) in formula (5), when Criterion emission amount is constant and vehicle condition, Che Midu, the gradient, speed, diesel vehicle vehicle dimensionless
Number is constant, and in the case where capable of ignoring and influencing produced by altitude change, then flue dust flow in tunnel is length of tunnel and flue dust flow
Integrated contributory factor function；Wherein, the calculation formula of the integrated contributory factor of flue dust flow such as formula (6):
C) concrete application formula (6) obtain the distinguished and admirable dust concentration calculating formula such as formula (7) in upstream:
In formula: L1For the length of upstream tunnels, m；QrFor the extraneous fresh air volume introduced from tunnel portal, m3/s；
D) divide the calculating of wind ratio:
Wind ratio is divided to determine by formula (8):
In formula: Q is the distinguished and admirable air quantity for branching to circulation air path air inducing section, m3/s；
According to the principle of mass conservation, then the calculation formula such as formula (9) of the distinguished and admirable air quantity of the short-track middle parallel connection in tunnel:
Qs=(1-e) Qr (9)
In formula: QsFor the short-track distinguished and admirable air quantity of parallel connection in tunnel, m3/s；
E) the distinguished and admirable dust concentration of the short-track parallel connection in tunnel calculates:
The distinguished and admirable flue dust of the short-track parallel connection in tunnel comes from two parts, first, upstream is distinguished and admirable to carry the flue dust to come；Second, in tunnel
The vehicle of the short-track interior traveling in road discharges and the fume amount of generation；Wherein, the upper of the short-track distinguished and admirable flue dust flow of parallel connection in tunnel is influenced
Urticaria stream carrying amount is determined by formula (10):
Qs1(VI)=δ1Qs (10)
In formula: Qs1(VI)For the flue dust flow distinguished and admirable from upstream, m2/s；
Formula (9) are substituted into formula (10), obtain formula (11):
Qs1(VI)=δ1(1-e)Qr (11)
In addition, the vehicle in the short-track interior traveling in tunnel discharges and the fume amount of formation calculates, such as formula (12):
Qs2(VI)=CLs (12)
In formula: Qs2(VI)For tunnel it is short-track parallel connection it is distinguished and admirable in increase newly flue dust flow, m2/s；
The distinguished and admirable cigarette of the short-track parallel connection in tunnel is obtained using formula (9), (11) and formula (12) according to basic physics theory
Dust concentration calculation formula (1):
2) the short-track length extreme value in tunnel is calculated:
A) the flue dust acceptable concentration of Ventilation Design for Tunnels is set as δ, when meeting δ1<δ2When≤δ, then meet the requirement of Design of ventilation, by
Formula (1) obtains formula (2):
In formula: δ is the flue dust acceptable concentration of Design of ventilation, m-1；
B) in formula (2), when the short-track length in tunnel reaches the short-track length extreme value in tunnel, δ2=δ, and use LscReplace Ls, then obtain
The short-track length extreme value determining type in tunnel, such as formula (3):
In formula: LscThe short-track length extreme value in tunnel, m；
Formula (3) shows when the short-track length in tunnel is greater than the short-track length extreme value in tunnel, the short-track distinguished and admirable flue dust of parallel connection in tunnel
Concentration is more than acceptable concentration, and the vehicle travelled in tunnel is short-track is dangerous.
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Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3505561B2 (en) * | 1997-10-29 | 2004-03-08 | 富士電機システムズ株式会社 | Road tunnel ventilation station equipment |
| CN200949473Y (en) * | 2006-06-20 | 2007-09-19 | 浙江省交通规划设计研究院 | Tunnel ventilating system with separate smoke exhauster |
| CN101328812A (en) * | 2008-07-26 | 2008-12-24 | 滕广林 | Wind pressuring arrangement method of deep well and mine |
| CN102400701A (en) * | 2010-09-10 | 2012-04-04 | 上海同岩土木工程科技有限公司 | Road tunnel intercommunication type longitudinal ventilation mode |
| CN202768046U (en) * | 2012-06-30 | 2013-03-06 | 中铁十二局集团第二工程有限公司 | Jet ventilation structure for tunnel construction of single inclined shaft and double main tunnels |
| CN104533498A (en) * | 2014-12-18 | 2015-04-22 | 西南交通大学 | Point exhaust type subway tunnel fire ventilation and smoke exhaust system |
| CN105971626A (en) * | 2016-05-23 | 2016-09-28 | 浙江省交通规划设计研究院 | Double-track tunnel provided with vertical shaft smoke discharge and ventilation combined and complemented system |
| CN106014468B (en) * | 2016-07-07 | 2018-09-14 | 长安大学 | A kind of complementary perpendicular/inclined shaft ventilating system in double holes of freeway tunnel |
| CN106703868A (en) * | 2016-08-29 | 2017-05-24 | 金斯科 | Natural ventilation and natural smoke extraction system for urban road tunnel |
| CN108343459B (en) * | 2018-01-16 | 2019-08-06 | 浙江工业大学 | It is a kind of can ventilation inclined shaft to double track tunnel supply and exhaust |
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2018
- 2018-08-09 CN CN201810903617.2A patent/CN108915753B/en active Active
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