CN108518239A - A method of it is aerated using box culvert during constructing tunnel - Google Patents
A method of it is aerated using box culvert during constructing tunnel Download PDFInfo
- Publication number
- CN108518239A CN108518239A CN201810267374.8A CN201810267374A CN108518239A CN 108518239 A CN108518239 A CN 108518239A CN 201810267374 A CN201810267374 A CN 201810267374A CN 108518239 A CN108518239 A CN 108518239A
- Authority
- CN
- China
- Prior art keywords
- box culvert
- constructing tunnel
- tunnel
- aerated
- sealing
- 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.)
- Pending
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Classifications
-
- 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
- E21F1/006—Ventilation at the working face of galleries or tunnels
-
- 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
- E21F1/04—Air ducts
-
- 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
- E21F1/08—Ventilation arrangements in connection with air ducts, e.g. arrangements for mounting ventilators
Abstract
The invention discloses a kind of method being aerated using box culvert during constructing tunnel, during constructing tunnel, processing, formation ventilating duct are sealed to the seam crossing of box culvert and box culvert, box culvert and hole wall；Processing, and reserved connecting hole are sealed to the box culvert outer end face of constructing tunnel originating terminal；The ventilating duct formed to box culvert assembly is divulged information in advance, tests the friction property coefficient and air leakage coefficient, rated wind pressure of box culvert, and match wind turbine；It carries out pinging wind after installation connection wind turbine, and detects box culvert and leak out situation and fan operation situation；Start wind turbine, monitors each position in real time and leak out situation, and processing is sealed in time to serious position of leaking out；As constructing tunnel promotes, internal box culvert constantly assembled can forward extend, and per one section of box culvert of assembly, will be sealed processing.The present invention makes full use of tunnel existing structure, not only strengthens ventilation effect, but also save material, substantially reduces cost.
Description
Technical field
The invention belongs to constructing tunnel fields, are related to a kind of construction ventilation of tunnel method, and in particular to one kind is applied in tunnel
The method being aerated using box culvert during work.This method can increase drafting efficiency in tunnel excavating process, reduce ventilation
Energy consumption.
Background technology
In tunnel excavating process, air flow property is poor in tunnel, and due to the influence of Work machine etc., the sky in tunnel
Gas deterioration jeopardizes equipment and the safety of staff, is the technical barrier in current constructing tunnel.
During constructing tunnel, tunnel not yet penetrates through, and only unilateral and air communication can not pass through the natural flowing of air
To improve the air quality in tunnel.Especially in the tunneling process of long distance tunnel, if without other secondary ventilation modes, tunnel
Air is substantially at stationary state in road, and pollutant cannot be spread in tunnel, be built up, will when reaching a certain concentration
Jeopardize the equipment in tunnel and the safety of staff, cause safety accident, leads to construction delay and economic loss.
Long distance tunnel mostly uses the tunneling methods such as drilling and blasting method, shield method.In drilling and blasting method driving, often exploding will once produce
Raw a large amount of toxic and harmful gas；In shield method execution, Shield-type machinery continuously tunnels, and requires material transportation high, I. C. engine steam
Tail gas discharge is big, these can all cause temperature in tunnel to increase, and air quality declines, it is necessary to efficient draft type is taken,
The construction environment in tunnel is set to reach the requirement of related specifications.
In long distance tunnel work progress, common draft type is mostly zip mode pneumatic hose forced ventilation, in hole
At the outer fresh wind in ground, using wind turbine by air hose to tunnel front air feed, waste air is discharged by tunnel return air outside hole.But
In internal box culvert and tunnel piercing synchronous construction, since box culvert occupied space is big, tunnel internal can be used for laying the sky of air hose
Between reduce, cause dust diameter to reduce.In tunnel, one timing of required airflow and ventilation distance, required with the reduction of dust diameter
The inversely proportional increase of wind pressure.But the maximum wind pressure that the maximum wind pressure that can provide of wind turbine and air hose can be born is restricted,
The draft type cannot be satisfied the ventilation requirement of engineering under extreme case.
Invention content
It is tired it is an object of the invention to divulge information for the long distance tunnel of current tunnel piercing and internal box culvert synchronous construction
Difficult problem provides a kind of method that can reduce ventilation energy consumption and improve drafting efficiency.To box culvert and box culvert, box culvert and hole
The seam crossing of wall is sealed processing, and using the box culvert after sealing as the transfer passage of fresh wind in tunnel, recycles fresh
Wind conveying fan and short air hose by it is fresh it is distinguished and admirable be pumped in box culvert, and then send to the method for tunnel inner working face, reach tunnel
Air-conditioning requirement and the purpose for saving energy consumption.
In view of the needs transported in hole, internal box culvert mostly uses prefabricated outside segmented hole, assembled form of construction work in hole.
Box culvert forms closed-loop with Tunnel wall on cross section；Box culvert is concrete structure, and has certain thickness；But box culvert
There is hole with box culvert, box culvert and hole wall seam crossing, can cause to leak out.Therefore it only needs to be sealed at abutment joint, box culvert is
It can be used as conveyance conduit of the fresh wind in hole.It divulges information in this way, air hose need not be separately set in hole, phase can be saved
The manpower and material cost answered.And space is big in box culvert, and in tunnel, one timing of required airflow, required wind pressure can be significantly less than wind
Wind pressure needed for pipe, can also reduce the energy consumption of fresh wind conveying fan, cost-effective.
In order to solve the above-mentioned technical problem, the technical solution adopted in the present invention is：
A method of it is aerated using box culvert during constructing tunnel, which is characterized in that include the following steps：
Step 1: during constructing tunnel, after the completion of every segment box culvert assembly, to this section of box culvert and adjacent box culvert and hole
The seam crossing of wall is sealed processing, forms ventilating duct；
Step 2: being sealed processing to the box culvert outer end face of constructing tunnel originating terminal, and reserves and matched with air hose size
Connecting hole；
Step 3: being divulged information in advance to the ventilating duct that box culvert assembly is formed by connecting hole, box culvert after encapsulation process is tested
Friction property coefficient and air leakage coefficient, and according to tunnel required airflow rated wind pressure, and match wind turbine；
Step 4: installing matched fresh wind conveying fan in the fresh wind suitable position in tunnel originating terminal ground, and pass through
Fresh wind conveying fan is connected by pipeline with the connecting hole of the box culvert outer end face of constructing tunnel originating terminal；
Step 5: after confirming that ventilating system is complete, carry out pinging wind, and detects box culvert and leak out situation and fan operation
Situation；
Step 6: starting fresh wind conveying fan, ventilating system enters operating status, monitors each position in real time and leaks out feelings
Condition, and processing is sealed in time to serious position of leaking out；
Step 7: as constructing tunnel promotes, internal box culvert constantly assembled can forward extend, complete in each section of box culvert assembly
At rear repetition processing is sealed according to step 1.
As an improvement, the seam crossing of the box culvert and box culvert, box culvert and hole wall is sealed processing using mortar.
As an improvement, the seam crossing of the box culvert and box culvert, box culvert and hole wall is sealed processing using sealing strip.
As an improvement, the sealing strip is epoxy resin sealing strip and/or polysulfide sealing strip.
As an improvement, the fresh wind conveying fan is axial flow blower.
As an improvement, after the sealing of every segment box culvert is completed, it is necessary to carry out air leak test, to seal bad position and
When adopt remedial measures, reseal.
As an improvement, box culvert using sealing strip seal when, can among box culvert seam preset packing material, the filling material
Material is polyethylene item or batten.
As an improvement, box culvert first polishes to box culvert corresponding region before the sealing of adhesive seal item.
The beneficial effects of the invention are as follows：
The present invention effectively increases air feed using the box culvert after encapsulation process as the transfer passage of fresh wind in tunnel
Pipeline crosses wind area, reduces the input amount of ventilation shaft, reduces ventilation wind pressure, reduces to fresh wind conveying fan
Performance requirement has reached saving material, has reduced energy consumption, puies forward efficient purpose, after the completion of constructing tunnel, by box culvert outer end face
Sealing remove, restore the original function of box culvert, dual-use material greatly reduces construction cost.
Description of the drawings
Fig. 1 is tunnel ventilation flow diagram of the present invention.
Fig. 2 is tunnel internal box culvert schematic cross-sectional view.
Fig. 3 is tunnel internal box culvert and the contact positions Dong Bi schematic diagram.
Fig. 4 is tunnel internal box culvert and box culvert contact position schematic diagram.
Fig. 5 is tunnel originating terminal box culvert outer end processing schematic diagram.
Fig. 6 is to use schematic diagram of the cement mortar as sealing material.
Fig. 7 is to use schematic diagram of the sealing strip as sealing material.
Fig. 8 is ventilating system schematic diagram.
1- box culverts, the holes 2- wall, 3- connecting holes.
Specific implementation mode
Below in conjunction with the accompanying drawings to a kind of method being aerated using box culvert during constructing tunnel provided by the invention
It is described in detail.
As shown in Figure 1, a kind of method being aerated using box culvert during constructing tunnel, is included the following steps：
Step 1: during constructing tunnel, after the completion of every segment box culvert assembly, to this section of box culvert and adjacent box culvert and hole
The seam crossing of wall is sealed processing, forms ventilating duct；
Step 2: being sealed processing to the box culvert outer end face of constructing tunnel originating terminal, and reserves and matched with air hose size
Connecting hole；
Step 3: being divulged information in advance to the ventilating duct that box culvert assembly is formed by connecting hole, box culvert after encapsulation process is tested
Friction property coefficient and air leakage coefficient, and according to tunnel required airflow rated wind pressure, and match wind turbine；
Step 4: installing matched fresh wind conveying fan (this implementation in the fresh wind suitable position in tunnel originating terminal ground
Example is axial flow blower), and by pipeline by the connecting hole of fresh wind conveying fan and the box culvert outer end face of constructing tunnel originating terminal
It is connected；
Step 5: after confirming that ventilating system is complete, carry out pinging wind, and detects box culvert and leak out situation and fan operation
Situation；
Step 6: starting fresh wind conveying fan, ventilating system enters operating status, monitors each position in real time and leaks out feelings
Condition, and processing is sealed in time to serious position of leaking out；
Step 7: as constructing tunnel promotes, internal box culvert constantly assembled can forward extend, complete in each section of box culvert assembly
At rear repetition processing is sealed according to step 1.
Fresh wind conveying fan described in the embodiment of the present invention is axial flow blower.Axial flow blower is selected, is actually not limited to
Axial flow blower, also can be selected other any air quantity and wind pressure meets the wind turbine of tunnel ventilation requirement.
The seam crossing of box culvert of the present invention and box culvert, box culvert and hole wall is that mortar can be used to be sealed processing, be can also be used
Sealing strip is sealed processing, but is not limited to above two encapsulation process mode.
Can preset packing material, the packing material be poly- second among box culvert seam when box culvert is sealed using sealing strip
Alkene foam strip or batten, but it is not limited to both materials.
First, be familiar with box culvert structure, find box culvert seam and box culvert and hole wall seam, measure seam size and
Length primarily determines the dosage of sealing material.Then, suitable sealing material is chosen, and is chosen according to different sealing materials
Suitable sealing means.In the process, the principle that need to meet is as follows：
A, the statistics of seam crossing is had to comprehensively accurate, can not omit, part otherwise can be caused to leak out, ventilating system is lost
Effect.
B, sealing material must be kept in the case of vibration and temperature change good air-tightness, certain durability and
Rigidity, and it is nontoxic, environmentally friendly, on the use of box culvert later stage without influence.
C, different sealing material sealing means are different, it is necessary to and it is reasonably combined, otherwise sealing effect can be caused bad, influenced
The efficiency of entire ventilating system.
D, after selected sealing material and sealing means, it is necessary to carry out air-leakage test to the effect of sealing, ensure to reach
To the requirement of engineering.
When selecting mortar as sealing material, should be wanted first according to slab culvert concrete intensity, joint gap, air-tightness
It asks, selects suitable cement mortar ratio.Since mortar has mobility, seam should be filled to closely knit, guarantee gas using grouting mode
Close property.Grouting pressure is unsuitable too small, avoids inside mortar that there are larger holes, can not ensure air-tightness；Grouting pressure should not mistake
Greatly, mortar can be made to overflow if excessive, wastes material and easily filling is invalid.Select mortar as sealing material sealing means such as
Shown in Fig. 6.
When selecting sealing strip as sealing material, first according to joint gap and air-tightness requirement, sealing strip is selected
Material.Common sealing strip has epoxy resin sealing strip, polysulfide sealing strip etc..The width of sealing strip should be suitable, sealing strip width
It is unsuitable too small, it has to be possible to cover all seam and both sides can be overlapped on, ensure air-tightness；Sealing strip width should not mistake
Greatly, overlap is long meaningless and wastes material.In order to ensure air-tightness, it is necessary in both sides adhesive seal item, when necessary
Can in the joint between the fillers such as filled polyethylene foam strip.Before adhesive seal item, first box culvert corresponding region should be beaten
Mill ensures the intensity pasted, and reduces the hole for pasting contact surface.Select sealing means of the sealing strip as sealing material when
As shown in Figure 7.
The sealing means of box culvert seam crossing are various, and sealing material also can flexibly be selected according to Practical Project, only be enumerated herein
Above two mode, but it is not limited to above-mentioned form.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, the change or replacement that can be readily occurred in,
It should be covered by the protection scope of the present invention.
Claims (8)
1. a kind of method being aerated using box culvert during constructing tunnel, which is characterized in that include the following steps：
Step 1: during constructing tunnel, after the completion of every segment box culvert assembly, to this section of box culvert and adjacent box culvert and hole wall
Seam crossing is sealed processing, forms ventilating duct；
Step 2: being sealed processing, and the reserved and matched company of air hose size to the box culvert outer end face of constructing tunnel originating terminal
Connect hole；
Step 3: being divulged information in advance to the ventilating duct that box culvert assembly is formed by connecting hole, box culvert rubs after test encapsulation process
Property coefficient and air leakage coefficient are wiped, and according to tunnel required airflow rated wind pressure, and matches wind turbine；
Step 4: installing matched fresh wind conveying fan in the fresh wind suitable position in tunnel originating terminal ground, and pass through pipeline
Fresh wind conveying fan is connected with the connecting hole of the box culvert outer end face of constructing tunnel originating terminal；
Step 5: after confirming that ventilating system is complete, carry out pinging wind, and detects box culvert and leak out situation and fan operation shape
Condition；
Step 6: starting fresh wind conveying fan, ventilating system enters operating status, monitors each position in real time and leaks out situation, and
To leaking out, serious position is sealed processing in time；
Step 7: as constructing tunnel promotes, internal box culvert constantly assembled can forward extend, after the completion of each section of box culvert assembly
It repeats to be sealed processing according to step 1.
2. a kind of method being aerated using box culvert during constructing tunnel as described in claim 1, it is characterised in that：Institute
The seam crossing for stating box culvert and box culvert, box culvert and hole wall is sealed processing using mortar.
3. a kind of method being aerated using box culvert during constructing tunnel as described in claim 1, it is characterised in that：Institute
The seam crossing for stating box culvert and box culvert, box culvert and hole wall is sealed processing using sealing strip.
4. a kind of method being aerated using box culvert during constructing tunnel as claimed in claim 3, it is characterised in that：Institute
It is epoxy resin sealing strip and/or polysulfide sealing strip to state sealing strip.
5. a kind of method being aerated using box culvert during constructing tunnel as described in claim 1, it is characterised in that：Institute
It is axial flow blower to state fresh wind conveying fan.
6. a kind of method being aerated using box culvert during constructing tunnel as described in claim 1, it is characterised in that：
After being completed per the sealing of segment box culvert, it is necessary to carry out air leak test, adopt remedial measures in time to the position for sealing bad, again
Sealing.
7. a kind of method being aerated using box culvert during constructing tunnel as claimed in claim 3, it is characterised in that：Case
Contain using sealing strip sealing when, can among box culvert seam preset packing material, the packing material be polyethylene item or
Batten.
8. a kind of method being aerated using box culvert during constructing tunnel as claimed in claim 3, it is characterised in that：Case
Contain before the sealing of adhesive seal item, first polishes box culvert corresponding region.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810267374.8A CN108518239A (en) | 2018-03-28 | 2018-03-28 | A method of it is aerated using box culvert during constructing tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810267374.8A CN108518239A (en) | 2018-03-28 | 2018-03-28 | A method of it is aerated using box culvert during constructing tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108518239A true CN108518239A (en) | 2018-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810267374.8A Pending CN108518239A (en) | 2018-03-28 | 2018-03-28 | A method of it is aerated using box culvert during constructing tunnel |
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Cited By (1)
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| CN104912099A (en) * | 2015-06-16 | 2015-09-16 | 李全民 | Fabricated precast concrete box culvert |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109854299A (en) * | 2018-12-11 | 2019-06-07 | 中煤科工集团重庆研究院有限公司 | Airway coefficient of frictional resistance fast determination method based on big data |
| CN109854299B (en) * | 2018-12-11 | 2020-10-23 | 中煤科工集团重庆研究院有限公司 | Method for rapidly determining friction resistance coefficient of ventilation roadway based on big data |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180911 |
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| RJ01 | Rejection of invention patent application after publication |