CN104405430B - Ventilation system and ventilation method for single-cavern large-section extra-long tunnel construction - Google Patents
Ventilation system and ventilation method for single-cavern large-section extra-long tunnel construction Download PDFInfo
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- CN104405430B CN104405430B CN201410520626.5A CN201410520626A CN104405430B CN 104405430 B CN104405430 B CN 104405430B CN 201410520626 A CN201410520626 A CN 201410520626A CN 104405430 B CN104405430 B CN 104405430B
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- 238000009423 ventilation Methods 0.000 title claims abstract description 102
- 238000010276 construction Methods 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000005192 partition Methods 0.000 claims abstract description 35
- 238000009434 installation Methods 0.000 claims description 7
- 238000009412 basement excavation Methods 0.000 claims description 6
- 239000003344 environmental pollutant Substances 0.000 claims description 3
- 231100000719 pollutant Toxicity 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 239000000779 smoke Substances 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 238000010790 dilution Methods 0.000 description 3
- 239000012895 dilution Substances 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000009430 construction management Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000003721 gunpowder Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000003862 health status Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21F1/14—Air partitions; Air locks
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Ventilation (AREA)
Abstract
The invention discloses a ventilation system and a ventilation method for single-cavern large-section extra-long tunnel construction. The ventilation system comprises a construction ventilation temporary partition (2) arranged on one side of a center line of a tunnel; a ratio of a sectional area of a sealed roadway formed by the construction ventilation temporary partition (2) and one side wall of the tunnel to a sectional area of a sealed roadway formed by the construction ventilation temporary partition (2) and the other side wall of the tunnel is close to 2:1; the sealed tunnel with the smaller sectional area is taken as a fresh air intake airway (4); polluted air returned from a tunnel face is discharged out of the tunnel through a polluted air discharging roadway (5) with the larger sectional area; at the outlet of a tunnel portal, the construction ventilation temporary partition (2) extends out of the portal to separate fresh air from polluted air in an area close to the portal. A jet flow tunnel ventilation mode is adopted, the difficult problem of extra-long-distance air supply during the single-cavern large-section extra-long tunnel construction is solved, the air supply efficiency for the tunnel face is effectively improved, the cost is saved, and a better economic benefit is achieved.
Description
Technical field
It is the present invention relates to the construction ventilation system and method for ventilation in a kind of tunnel more particularly to a kind of for solving single hole
The ventilating system and method for ventilation of big cross section Extra Long Tunnel Construction.
Background technology
Due to the closure of tunnel structure, the smoke of gunpowder that mechanical work is produced during constructing tunnel tail gas, explosion are produced,
Toxic and harmful that stratum is overflowed etc. will be gathered in tunnel, threaten Health Status For Workers Exposed and construction safety.To improve tunnel
Road construction operation environment, ensures the health of operating personnel, it is necessary to take effective venting practice.
In the construction ventilation design of existing tunnel, almost all of tunnel all adopts positive mechanical draft type.Machinery
Ventilation include it is forced, take out (row) and go out formula, hybrid and laneway type.As shown in figure 1, forced ventilation is to install axial flow blower
In the fresh wind area beyond the 30m of hole, axial flow blower provides air quantity and the blast that face needs, will be fresh by airduct
Blast is sent to excavated surface, and the dirty wind of dilution is discharged outside hole along tunnel.This draft type Axial-Flow assembling is solid
Positioning is put, and as the propulsion of face only needs to spreading ventilation duct, is not limited by execution conditions substantially.Discharge formula is divulged information
(shown in Fig. 2) is that ventilation blower is installed near excavated surface polluter, dirty wind is discharged outside hole by ventilation duct, fresh wind
Excavated surface is entered into along tunnel, hole separate ventilation pipe air outlet need to be in the lower wind direction beyond the 30m of hole.This draft type
Axis flow fan is placed near face, and to work surface, nearby polluter dilution effect is good compared with forced ventilation, but axle stream
Blower fan needs to change installation site with the propulsion of face, is unfavorable for the construction management at scene.Both draft types exist
Single hole tunnel with can adopt in parallel double-hole tunnel construction ventilation, but with the increase of tunnel piercing length, airduct press-in
Away from increasing, flowing resistance will increase rapidly distinguished and admirable flow distance in length and tunnel, to reach the requirement of ventilation length,
The mode of axial flow blower in parallel or series can only be taken, now, while the energy excessive consumption is caused, to ventilation installation and skill
The requirement of art is also greatly improved, and ventilation effect also can have a greatly reduced quality.
Ventilation by ducts is divided into main fan laneway type and jet laneway type.What at present construction ventilation application was more is jet tunnel
Formula is divulged information.As shown in figure 3, jet blower is adopted in jet flow gallery ventilation mode for power, using parallel pair of hole or auxiliary hole
Road guides fresh wind to hole, then fresh wind is sent to into face using ventilation duct by the axial flow blower for being installed in fresh wind area
Near, can effectively shorten air supplying distance, drafting efficiency is improved, efficiently solve the construction ventilation of long range double-hole tunnel
Problem.Ventilation by ducts is affected larger by execution conditions, auxiliary under the conditions of typically can be only applied to parallel pair of hole of service channel
Help also local employing sometimes in the case of tunnel insertion.
But, with the fast development of highway and high-speed railway, substantial amounts of long range is emerged in tunnel construction
Big cross section and large section list hole tunnel.In the construction in such tunnel, traditional ventilation by ducts be not suitable for, and works as pick
When entering in small distance, forced ventilation still can effectively solve the problem that construction ventilation problem, and when driving distance is larger, how economy has
Effect ground solves the problems, such as that construction ventilation becomes focus.
The content of the invention
The purpose of the present invention is that and provide to solve the above problems one kind for solving single hole big cross section speciality tunnel
The ventilating system of road construction.
The present invention is adopted the following technical scheme that：
A kind of single hole big cross section Extra Long Tunnel Construction ventilating system, including the construction for being arranged on the tunnel centrage side
Divulge information interim partition wall (2), it is ensured that the interim partition wall of construction ventilation (2) surrounds into respectively the section of enclosing tunnel with the side wall of tunnel two
Area than close 2: 1, using the less enclosing tunnel of wherein cross-sectional area as the fresh wind intake (4) for conveying fresh wind,
The pollution wind of face backflow is then discharged in tunnel (5) from the larger pollution wind of cross-sectional area and discharged outside tunnel；In tunnel portal
Exit, the interim partition wall of construction ventilation (2) extends appears outward, and the fresh wind regime of hole near zone is separated with pollution wind；
The fresh wind intake (4), pollution wind are discharged in tunnel (5), are risen pressure summation according to jet blower and are more than tunnel resistance
Principle under select jet blower number of units, and arrange installation jet blower to provide uniform wind speed.
Described ventilating system, in fresh wind intake (4) arrival end L6At position arrange the first jet blower (7),
Apart from jet blower (7) L5Position arrange the second jet blower (8), pollution wind discharge tunnel (5) in, distance two lining chassis
L1Position arranges the 3rd jet blower (11), and distance pollution wind discharges tunnel (5) port of export L74th jet blower is set at position
(3)；In fresh wind intake (4), in distance two chassis L is served as a contrast3To arrange forced axial flow blower (9) at 100m positions,
Forced axial flow blower (9) distance construction divulges information interim partition wall (2) one end for L4, forced axial flow blower (9) connection ventilation duct
(10), ventilation duct (10) is transported to fresh wind apart from face L2Place, is that tunnel tunnel face conveys fresh wind, is now formed
The construction ventilation system of jet flow gallery ventilation；Wherein, the 3rd jet blower (11) serves as a contrast chassis apart from L with two1Take 20m；Watt
In this construction ventilation of tunnel, ventilation duct (10) air outlet is with face apart from L2Control is in 4m；Forced axial flow blower (9) and two
Lining chassis apart from L3Take 100～200m；Axial flow blower is inwardly indented apart from L4Take 30m；The distance of jet blower to tunnel portal
L6And L7Take 100m；The interim partition wall of construction ventilation (2) extend tunnel portal apart from L8At least 100m.
Described ventilating system, the big cross section super long tunnel refers to three lanes and three lanes above freeway tunnel or height
Fast railway tunnel, its cross-sectional area is 50～100m2, length of tunnel is in more than 3km.
Using the method for ventilation of arbitrary described ventilating system, construction ventilation is set in the tunnel centrage side interim
Partition wall (2), the interim partition wall of construction ventilation (2) surrounds into respectively the cross-sectional area of enclosing tunnel than close 2 with the side wall of tunnel two:
1, using the less enclosing tunnel of wherein cross-sectional area as the fresh wind intake (4) for conveying fresh wind, face backflow
Pollution wind is then discharged in tunnel (5) from the larger pollution wind of cross-sectional area and discharged outside tunnel；In tunnel portal exit, construction is logical
Outside the interim partition wall of wind (2) extension is appeared, the fresh wind regime of hole near zone is separated with pollution wind；In the fresh wind air intake
Tunnel (4), pollution wind are discharged in tunnel (5), are risen according to jet blower and select to penetrate under principle of the pressure summation more than tunnel resistance
The number of units of flow fan, and arrange installation jet blower to provide uniform wind speed.
Described method, in fresh wind intake (4) arrival end L6First jet blower (7), distance are set at position
First jet blower (7) L5Position arrange the second jet blower (8), pollution wind discharge tunnel (5) in, distance two lining chassis
L1Position arranges the 3rd jet blower (11), and distance pollution wind discharges tunnel (5) port of export L74th jet blower is set at position
(3)；In fresh wind intake (4), in distance two chassis L is served as a contrast3To arrange forced axial flow blower (9) at 100m positions,
Forced axial flow blower (9) distance construction divulges information interim partition wall (2) one end for L4, forced axial flow blower (9) connection ventilation duct
(10), ventilation duct (10) is transported to fresh wind apart from face L2Place, is that tunnel tunnel face conveys fresh wind；Wherein, the 3rd
Jet blower (11) is with two lining chassis apart from L1Take 20m；In gas tunnel construction ventilation, ventilation duct (10) air outlet and area
Identity distance is from L2Control is in 4m；Forced axial flow blower (9) is with two lining chassis apart from L3Take 100～200m；Axial flow blower is to inside contracting
Enter apart from L4Take 30m；Jet blower is to tunnel portal apart from L6And L7Take 100m；The interim partition wall of construction ventilation (2) extends tunnel
Road hole apart from L8At least 100m；First jet blower (7) and the second jet blower (8) operating make fresh wind intake
(4) negative pressure is formed in, fresh wind can be moved near forced axial flow blower (9) because of the presence of negative pressure outside hole, forced axle stream
Fresh wind in fresh wind intake (4) is pressed into the tunnel excavation palm by blower fan (9) by ventilation duct (10) through two lining chassis
Near sub- face, the pollutant produced due to constructing tunnel are diluted, and be changed into pollution wind；Discharge in tunnel (5) in pollution wind,
4th jet blower (3) and the 3rd jet blower (11) to operate and discharge tunnel (5) along pollution wind by the pollution wind near face
Draw outside hole.
Ventilating system of the present invention is the characteristics of utilizing tunnel cross-section big, and interim partition wall is arranged in tunnel, so as to
To fresh wind air-supply tunnel, the purpose using jet flow gallery ventilation mode is reached.In order to avoid at tunnel portal fresh wind with
Pollution wind influences each other, and interim partition wall need to extend to outside hole at least distance of 100m, according to site environment and meteorological condition,
The height of the interim partition wall of reasonable selection on the basis of tunnel cross-section height.
The beneficial effects of the present invention is：
The present invention is opened up using the interim partition wall being arranged in large cross-section tunnel in single hole big cross section Extra Long Tunnel Construction
Air-supply tunnel required for exit flow ventilation by ducts mode, and using jet flow gallery ventilation mode, by jet blower
The optimization of quantity and the reasonable layout of set location, the air supplying distance for making axial flow blower is reduced into 100～200m (about two lining platforms
Distance of the car to face) left and right, it is to avoid a difficult problem for extra long distance air-supply during single hole big cross section Extra Long Tunnel Construction, effectively carry
High efficiency that face is blown, and cost has been saved, achieve preferable economic benefit.
Description of the drawings
Fig. 1 is forced ventilation schematic diagram；
Fig. 2 is discharge formula draft type schematic diagram；
Fig. 3 is jet flow gallery ventilation schematic diagram；
Fig. 4 is the overlooking the structure diagram of ventilating system of the present invention；
Fig. 5 is C in Fig. 11-C1The section structure schematic diagram in direction.
Fig. 6 is C in Fig. 12-C2The section structure schematic diagram in direction.
Fig. 7 is C in Fig. 13-C3The section structure schematic diagram in direction.
Fig. 8 is C in Fig. 14-C4The section structure schematic diagram in direction.
Fig. 9 is using the tunnel portal front view of ventilating system of the present invention.
Figure 10 is using the tunnel portal side view of ventilating system of the present invention.
Figure 11 is using the tunnel portal top view of ventilating system of the present invention.
1 big cross section super long tunnel, the interim partition wall of 2 construction ventilations, 3,7,8,11 jet blowers, 4 fresh wind intakes, 5
Pollution wind discharges tunnel, 6 interim partition wall hole outer extensions point, 9 axial flow blowers, 10 ventilation ducts.
Specific embodiment
Make further concrete introduction to the present invention with reference to certain case history, and to carrying out economic efficiency contrast, explanation
The superiority of the construction ventilation system.
So-called big cross section super long tunnel refers to three lanes and three lanes above freeway tunnel and high-speed railway in the present invention
Tunnel, its cross-sectional area is 50m2More than, length of tunnel is in more than 3km.
Certain single hole big cross section three lanes Extra-long Highway Tunnel is relied on, under III level wall rock condition, tunnel maximum excavation area
For 135m2, maximum headroom area is 110m after the completion of Tunnel Second Lining2.Coal measure strata, comprehensive all geology are passed through by Sui Zhi areas
Prospecting data and survey data determine that the tunnel is present low gas tunnel.
1) theoretical foundation part
(1) required airflow is determined
To consider when determining excavation face required airflow near face simultaneously most number required airflows of work, prevent tunnel
Engine exhaust tail gas in the neighbouring explosion smoke evacuation required airflow of the minimum windspeed required airflow of methane accumulation in road, face and dilution hole
Required airflow, and take the maximum in above required airflow as ultimate criterion required airflow.
1. the most number required airflows for working simultaneously near face
Q=qnk (1)
In formula：The required airflow of operating personnel in q- holes, high methane takes 4m3/ min people；The operation simultaneously of the n- scope of operations is most
Many numbers, 90 people；K- reserve factors, take 1.5.
2. the minimum windspeed required airflow of methane accumulation in tunnel is prevented
Qv=SV (2)
In formula：The excavation area in S- tunnels, m2；Minimum methane accumulation wind speed in V- tunnels.
3. face explosion nearby smoke evacuation required airflow
In formula：T- ventilation times；A- is while rendrock amount；The CO that b- per kilograms explosive is produced；L- smoke evacuation safe distances；
PqThe ratio of-airduct whole story end air quantity；The CO concentration that C- air-conditioning requirements reach.
4. the required airflow of engine exhaust tail gas in hole is diluted
Qs=Hqk (4)
In formula：H- diesel machine total works, kW；Q- diesel machine unit power wind supply quantities, 4.5m3/(min·kW)；K- work(
Rate coefficient, takes 0.63.
(2) axial flow blower wind supply quantity is determined
QBlower fan=Qmax/k1 (5)
In formula：η100- hundred meters of air leak rate of air curtain, take 1%；k1- effective of wind amount rate；L- airducts are pressed into length, m.
(3) air duct resistance and tunnel resistance are determined
H=(Rf+Rx)Q1*Q2 (7)
In formula：Rf- specific friction resistance；Rx- local windage；α-coefficient of frictional resistance；ζb- coefficient of partial resistance.
When air duct resistance is calculated, airduct parameter is taken：Q1- axial flow blower wind supply quantity；Q2- wind tube outlet air quantity, L- airduct pressures
Enter length；U- airduct girths；S1- airduct sectional area；.
When tunnel resistance is calculated, parameters for tunnel is taken：Q1With Q2It is identical, it is air duct outlet air quantity；L- dirt wind return air distances
Degree；U- tunnel cross-section girths；S1- tunnel cross-section sectional area；
Tunnel wall frictional resistant coefficient, i.e. coefficient of frictional resistance α computing formula：
In formula：Δ-tunnel wall absolute roughness, mm；The internal diameter in d- tunnels, mm.
(4) determine that jet blower rises pressure
In formula：vjThe air outlet velocity (m/s) of-jet blower；SPenetrateDischarge area (the m of-jet blower2)；η-jet blower position
Friction loss reduction coefficient is put, 0.85 is taken；S- tunnel clearance basal areas；V- Tunnel Design wind speed.
(5) power of motor of adapted needed for axial flow blower
In formula：Skw- axial flow blower shaft power (kW)；M1- power of motor (kW)；ηm- electric efficiency (%), desirable 90%～
95%；K- capacity motor safety coefficients, can use 1.15；QaAir quantity (the m of-axial flow blower3/s)；ptotThe full blast pressure of-axial flow blower
(N/m2)；η-fan efficiency (typically takes 80%)；t0- standard temperature (DEG C), takes 20 DEG C；t1- blower fan ambient temperature (DEG C)；p0- mark
Quasi- atmospheric pressure (N/m2), take 101.325N/m2；p1- blower fan ambient atmosphere pressure (N/m2)。
2) case study on implementation
As shown in Fig. 4-Figure 11, with the tunnel centerline direction as longitudinal direction, the setting construction of the side of the centrage
Divulge information interim partition wall 2, it is ensured that the interim partition wall 2 of construction ventilation surrounds into respectively the cross-sectional area of enclosing tunnel with the side wall of tunnel two
Than close 2: 1, will the wherein less enclosing tunnel of cross-sectional area as fresh wind intake 4, the pollution wind of face backflow
Then pollute wind from two wide enclosing tunnels of runway to discharge in tunnel 5 outside discharge tunnel, in the fresh wind intake
4th, pollute wind to discharge in tunnel 5, risen according to jet blower and select jet blower under principle of the pressure summation more than tunnel resistance
Number of units, and arrange installation jet blower to provide uniform wind speed.In the present embodiment, in the arrival end L of fresh wind intake 46
At position arrange jet blower 7, apart from jet blower 7L5Position arrange jet blower 8, pollution wind discharge tunnel 5 in, away from
From two lining chassis L1Position arranges jet blower 11, and distance pollution wind discharges the port of export L of tunnel 57Jet blower 3 is set at position.
It is that the lining chassis of reduction two are logical to construction in the case of the distance for shortening ventilation as far as possible in fresh wind intake 4
The impact of wind, in distance two chassis L is served as a contrast3To arrange axial flow blower 9, the ventilation of the distance construction of axial flow blower 9 at 100m right positions
Interim one end of partition wall 2 is L4, the connection ventilation duct 10 of axial flow blower 9, ventilation duct 10 is transported to fresh wind apart from face L2Place,
Fresh wind is conveyed for tunnel tunnel face, the construction ventilation system of jet flow gallery ventilation is now formed.
In tunnel portal exit, extended by the interim partition wall 2 of construction ventilation and appear foreign minister's degree for L8, by hole near zone
Fresh wind regime separate with pollution wind, the then operating of jet blower 7 and 8 makes to form negative pressure in fresh wind intake 4, new outside hole
Fresh wind can be moved near axial flow blower 9 because of the presence of negative pressure, and axial flow blower 9 will be fresh through two lining chassis by ventilator 10
Fresh wind is pressed near tunnel excavation face in wind intake 4, dilutes the pollutant produced due to constructing tunnel, and
It is changed into pollution wind.Discharge in tunnel 5 in pollution wind, jet blower 3 and jet blower 11 operate the pollution near face
Wind is discharged tunnel 5 and is drawn outside hole along pollution wind.
Wherein, local jet blower fan 11 and two serves as a contrast chassis apart from L1Take 20m to be advisable；In gas tunnel construction ventilation, wind
10 air outlets of cylinder are with face apart from L2Control is in 4m or so；Forced axial flow blower 9 and two lining chassis apart from L3According to scene
It is actual to shorten only head forced ventilation length of tube as far as possible while avoiding influencing each other, can use 100～200m；Axial flow blower
It is inwardly indented apart from L4Take 30m to be advisable；Calculated according to formula (7) (8) (9) and (10) and determine jet blower spacing in air-supply tunnel
L5；Jet blower is to tunnel portal apart from L6And L7Take 100m；The interim partition wall 2 of construction ventilation extends the distance of tunnel portal
L8At least 100m.
3) economic efficiency contrast
The tunnel is single hole big cross section super long tunnel, and forced ventilation can only be adopted before this ventilating system is provided without, and adopts
With being laneway type longitudinal ventilation with jetblower after this ventilating system, now two kinds of ventilating systems are compared in terms of economy and effect, explanation
The superiority of this ventilating system.
The tunnel required airflow is defined as 2100m3/ min, using the ventilation duct of Φ 1500, tunnel piercing length is 3km, axle
Flow fan selects SDF(c)- No14, jet blower selects SDS-7.1-2P-6-30 °.
During using pressure system of ventilation, duct length is 3km, and blower fan wind supply quantity is 3000m3/min。
Two lining chassis are generally 100m or so with the distance of face, the forced ventilation in jet flow gallery ventilation system
Length of tube is taken as 200m, and blower fan wind supply quantity is 3000m3/min.
The economic efficiency contrast result such as following table of pressure system of ventilation and ventilation by ducts system.
Note：The effect of local jet blower fan is to prevent local gas from gathering.
The practicality and superiority of the present invention are clear that from above economic efficiency contrast result.
It should be appreciated that for those of ordinary skills, can according to the above description be improved or be converted,
And all these modifications and variations should all belong to the protection domain of claims of the present invention.
Claims (5)
1. a kind of single hole big cross section Extra Long Tunnel Construction ventilating system, it is characterised in that including being arranged on the tunnel centrage
The interim partition wall of the construction ventilation (2) of side, it is ensured that the interim partition wall of construction ventilation (2) surrounds into respectively closing with the side wall of tunnel two
The cross-sectional area in tunnel enters than close 2: 1 using the less enclosing tunnel of wherein cross-sectional area as the fresh wind for conveying fresh wind
Air way road (4), the pollution wind of face backflow is then discharged in tunnel (5) from the larger pollution wind of cross-sectional area and discharged outside tunnel；
In tunnel portal exit, the interim partition wall of construction ventilation (2) extends appears outward, by the fresh wind regime of hole near zone and pollution
Wind is separated；Discharge in tunnel (5) in the fresh wind intake (4), pollution wind, pressure summation is risen according to jet blower and is more than
The number of units of jet blower is selected under the principle of tunnel resistance, and arranges installation jet blower to provide uniform wind speed.
2. ventilating system according to claim 1, it is characterised in that in fresh wind intake (4) arrival end L6At position
First jet blower (7) is set, apart from jet blower (7) L5Position arrange the second jet blower (8), pollution wind discharge lane
In road (5), the lining chassis L of distance two1Position arranges the 3rd jet blower (11), and distance pollution wind discharges tunnel (5) port of export L7Position
Put place and the 4th jet blower (3) is set；In fresh wind intake (4), in distance two chassis L is served as a contrast3To set at 100m positions
Forced axial flow blower (9) is put, forced axial flow blower (9) distance construction divulges information interim partition wall (2) one end for L4, forced axle
Flow fan (9) connection ventilation duct (10), ventilation duct (10) is transported to fresh wind apart from face L2Place, is that tunnel tunnel face is defeated
Fresh wind is sent, the construction ventilation system of jet flow gallery ventilation is now formed；Wherein, the 3rd jet blower (11) and two lining platforms
Car is apart from L1Take 20m；In gas tunnel construction ventilation, ventilation duct (10) air outlet is with face apart from L2Control is in 4m；Press-in
Formula axial flow blower (9) is with two lining chassis apart from L3Take 100～200m；Axial flow blower is inwardly indented apart from L4Take 30m；Jet wind
Machine is to tunnel portal apart from L6And L7Take 100m；The interim partition wall of construction ventilation (2) extend tunnel portal apart from L8At least
100m。
3. ventilating system according to claim 1, it is characterised in that the big cross section super long tunnel refers to three lanes and three cars
Road above freeway tunnel or Railway Tunnel, its cross-sectional area is 50～100m2, length of tunnel is in more than 3km.
4. using the method for ventilation of the arbitrary described ventilating system of claim 1-3, it is characterised in that in the tunnel centrage
Side arranges the interim partition wall (2) of construction ventilation, and the interim partition wall of construction ventilation (2) surrounds into respectively closing lane with the side wall of tunnel two
The cross-sectional area in road than close 2: 1, using the less enclosing tunnel of wherein cross-sectional area as the fresh wind air intake for conveying fresh wind
Tunnel (4), the pollution wind of face backflow is then discharged in tunnel (5) from the larger pollution wind of cross-sectional area and discharged outside tunnel；
Tunnel portal exit, the interim partition wall of construction ventilation (2) extends appears outward, by the fresh wind regime of hole near zone and pollution wind
Separate；Discharge in tunnel (5) in the fresh wind intake (4), pollution wind, pressure summation is risen according to jet blower and is more than tunnel
The number of units of jet blower is selected under the principle of road resistance, and arranges installation jet blower to provide uniform wind speed.
5. method according to claim 4, it is characterised in that in fresh wind intake (4) arrival end L6Arrange at position
First jet blower (7), jet blower (7) L of distance first5Position arrange the second jet blower (8), pollution wind discharge lane
In road (5), the lining chassis L of distance two1Position arranges the 3rd jet blower (11), and distance pollution wind discharges tunnel (5) port of export L7Position
Put place and the 4th jet blower (3) is set；In fresh wind intake (4), in distance two chassis L is served as a contrast3To set at 100m positions
Forced axial flow blower (9) is put, forced axial flow blower (9) distance construction divulges information interim partition wall (2) one end for L4, forced axle
Flow fan (9) connection ventilation duct (10), ventilation duct (10) is transported to fresh wind apart from face L2Place, is that tunnel tunnel face is defeated
Send fresh wind；Wherein, the 3rd jet blower (11) serves as a contrast chassis apart from L with two1Take 20m；In gas tunnel construction ventilation, ventilation
Pipe (10) air outlet is with face apart from L2Control is in 4m；Forced axial flow blower (9) is with two lining chassis apart from L3Take 100～
200m；Axial flow blower is inwardly indented apart from L4Take 30m；Jet blower is to tunnel portal apart from L6And L7Take 100m；Construction ventilation
Interim partition wall (2) extend tunnel portal apart from L8At least 100m；First jet blower (7) and the second jet blower (8)
Operating makes to form negative pressure in fresh wind intake (4), and fresh wind can move to forced axle stream wind because of the presence of negative pressure outside hole
Near machine (9), forced axial flow blower (9) will be new in fresh wind intake (4) through two lining chassis by ventilation duct (10)
Fresh wind is pressed near tunnel excavation face, dilutes the pollutant produced due to constructing tunnel, and is changed into pollution wind；
Pollution wind is discharged in tunnel (5), and the 4th jet blower (3) and the 3rd jet blower (11) operate the pollution wind near face
Tunnel (5) are discharged along pollution wind to draw outside hole.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410520626.5A CN104405430B (en) | 2014-10-08 | 2014-10-08 | Ventilation system and ventilation method for single-cavern large-section extra-long tunnel construction |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410520626.5A CN104405430B (en) | 2014-10-08 | 2014-10-08 | Ventilation system and ventilation method for single-cavern large-section extra-long tunnel construction |
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| Publication Number | Publication Date |
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| CN104405430A CN104405430A (en) | 2015-03-11 |
| CN104405430B true CN104405430B (en) | 2017-05-10 |
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| CN106593508A (en) * | 2016-12-26 | 2017-04-26 | 中铁二局集团有限公司 | Plateau high-gas extra long separating type tunnel construction ventilation method |
| CN107339117B (en) * | 2017-08-16 | 2023-08-11 | 重庆工业职业技术学院 | Ventilation system used in tunnel construction |
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| CN108087012A (en) * | 2017-12-25 | 2018-05-29 | 中矿金业股份有限公司 | A kind of mine skip shaft outgoing airflow shuts off partition apparatus |
| CN108561181B (en) * | 2018-01-05 | 2019-09-10 | 安徽清启***集成有限公司 | A kind of ventilative metope structure of subway tunnel smoke evacuation |
| CN109139081B (en) * | 2018-09-20 | 2020-03-17 | 中铁一局集团第五工程有限公司 | High-gas ultra-long tunnel construction ventilation method |
| CN110108633B (en) * | 2019-04-26 | 2021-08-10 | 辽宁工程技术大学 | Method for measuring mine ventilation friction resistance coefficient |
| CN111677541A (en) * | 2020-06-30 | 2020-09-18 | 中国水利水电第五工程局有限公司 | Safe construction ventilation method for large-diameter earth pressure balance shield of low-gas tunnel |
| CN111794796A (en) * | 2020-07-14 | 2020-10-20 | 中电建路桥集团有限公司 | Permanent and temporary combined roadway type ventilation method |
| CN112412518B (en) * | 2020-10-16 | 2023-06-09 | 湖南长院悦诚装备有限公司 | Tunnel face circulation air supply system |
| CN112211659B (en) * | 2020-10-19 | 2022-08-23 | 中铁六局集团有限公司 | Tunnel ventilation method |
| CN112647998B (en) * | 2020-12-16 | 2023-06-20 | 华能煤炭技术研究有限公司 | Tunneling roadway ventilation method and coal mine roadway system |
| CN113217070B (en) * | 2021-06-25 | 2023-03-21 | 中铁二十三局集团有限公司 | Novel tunnel construction ventilation system based on high-pressure air supply and ventilation method thereof |
| CN113360991B (en) * | 2021-06-29 | 2023-03-14 | 四川农业大学 | Design method of disaster prevention ventilation facility of tunnel portal emergency rescue station |
| CN115726829A (en) * | 2022-11-02 | 2023-03-03 | 中铁十八局集团有限公司 | Ventilation structure that branch tunnel wind regime moves inwards |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101215973A (en) * | 2007-12-29 | 2008-07-09 | 中铁隧道集团有限公司 | Tunnel construction jet flow laneway ventilation method |
| CN101225746A (en) * | 2008-02-01 | 2008-07-23 | 中铁十七局集团第四工程有限公司 | Laneway type ventilating technique for long and large tunnel |
| RU2392440C1 (en) * | 2009-04-27 | 2010-06-20 | ОАО "Уральский научно-исследовательский и проектный институт галургии" (ОАО "Галургия") | Method for removal of dust and gas from breakage heading in case of room-and-pillar development system |
| CN202391447U (en) * | 2011-12-14 | 2012-08-22 | 中铁十二局集团第二工程有限公司 | Single-head tunneling no-air-door roadway type ventilation structure of super-long tunnel |
| CN204126663U (en) * | 2014-10-08 | 2015-01-28 | 西南交通大学 | A kind of single hole big cross section Extra Long Tunnel Construction ventilation system |
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