CN102080560B - Tunnel wind room relay ventilation method for long blind heading - Google Patents
Tunnel wind room relay ventilation method for long blind heading Download PDFInfo
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- CN102080560B CN102080560B CN 201010587780 CN201010587780A CN102080560B CN 102080560 B CN102080560 B CN 102080560B CN 201010587780 CN201010587780 CN 201010587780 CN 201010587780 A CN201010587780 A CN 201010587780A CN 102080560 B CN102080560 B CN 102080560B
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Abstract
The invention provides a tunnel wind room relay ventilation method for long blind heading, which comprises the following steps of: preparing for construction; constructing wind rooms, i.e. separating the upper cross section of a tunnel in a certain range into the wind rooms by steel plates or arranging main holes with certain length as the wind rooms; ventilating the wind rooms, delivering fresh air to the wind rooms through ventilation pipes and a fan, and then introducing the fresh air to all working surfaces of the tunnel through the wind rooms; examining the ventilation effect of all working surfaces, and analysing a ventilation system and examining the seal conditions of the wind rooms and the ventilation pipes when the ventilation effect cannot meet the requirements on the working surfaces; and increasing excavation mileages when the ventilation effect meets the requirements on the working surfaces. The method largely improves the ventilation conditions of the working surfaces, almost reduces the wind leakage rate of the wind rooms to zero and greatly increases the length of blind heading.
Description
Technical field
The present invention relates to only driving tunnel air compartment relay ventilation method of a kind of long distance.
Background technology
Along with the development of national economy, the Construction amount in the tunnel of growing up in the railway construction is increasing.In the domestic constructing tunnel, owing to still extensively adopt the drilling and blasting method excavation, and the mechanization of building operation degree improves day by day, after the explosion and operating environment deterioration in the tunnel that the pernicious gas that produces causes in the diesel machine operation process, more and more become the engineering constraint progress, affect the healthy key factor of operating personnel in duration of a project and the harm hole.
Tunnel ventilation is the critical process that drilling and blasting method is built the tunnel, and the quality of this operation construction technology will directly have influence on integral layout and the economic effect of constructing tunnel, be the key of engineering construction success or failure.The form of tunnel ventilation has various at home, only forced construction ventilation is one of technological difficulties during long tunnel is built always, along with improving constantly of ventilation theory and technical equipment, the distance of only forced construction ventilation is also more and more longer, the optimum efficiency of only construction ventilation of guarantee how, it is the direction that construction is updated and studied, and the air compartment relay only head driving application in long of ventilating in trackless transportation speciality inclined shaft and super long tunnel, similar successful case is less at home, even other relay ventilation method is arranged, its ventilation effect is not good, and construction and maintenance be difficulty, and construction cost is larger.
Summary of the invention
The range of application of air compartment relay ventilation method of the present invention relates to the solely relay of head driving tunnel ventilation of long distance, and main application scenarios has following three kinds:
The first application scenarios: two-wire list hole is imported and exported solely head driving without auxiliary cavern by the tunnel, can take steel plate to be divided into air compartment in the section certain limit on the tunnel.Referring to Fig. 1.
The second application scenarios: the two holes of two-wire are imported and exported solely head driving without auxiliary cavern by the tunnel, can take steel plate to be divided into air compartment in the section certain limit on the tunnel.When air compartment is used, be advisable not affect the work plane construction, particularly the air compartment place can ensure normally and be open to traffic, and prevents from going here and there wind during ventilation.Referring to Fig. 2.
The third application scenarios: two-wire list hole or the construction of two-wire double-hole tunnel, the situation of two scope of operations, three scope of operations or four scope of operations are advanced in inclined shaft or horizontal hole.Can take the method described in detail in the specific embodiment for three scope of operations, utilize the positive hole of certain-length that air compartment is set, can on the tunnel, take steel plate to be divided into air compartment in the section certain limit for two scope of operations or four scope of operations, referring to Fig. 3 and Fig. 4.When air compartment is used, be advisable not affect the work plane construction, particularly the air compartment place can ensure normally and be open to traffic, and prevents from going here and there wind during ventilation.
According to an aspect of the present invention, only driving tunnel air compartment relay ventilation method of long distance may further comprise the steps: preparation of construction; Air compartment construction is taked steel plate to be divided into air compartment on the tunnel or is utilized the positive hole of certain-length that air compartment is set in the section certain limit; Air compartment ventilates, and utilizes air chimney and blower fan that fresh air is delivered to air compartment, again by air compartment draw fresh air to the tunnel each work plane; The ventilation effect inspection of each work plane when ventilation effect does not satisfy the work plane needs, is analyzed ventilation system, revises the ventilation parameter, checks wind chamber sealing situation and air pipeline; When ventilation effect satisfies the work plane needs, increase the excavation mileage.
Further, when to be two-wire list hole without auxiliary cavern, the two holes of two-wire advance the situation of two scope of operations in two-wire list hole or the two holes of two-wire or four scope of operations without auxiliary cavern or inclined shaft or horizontal hole in the tunnel, on the tunnel, take steel plate to be divided into air compartment in the section certain limit.
Further, when the tunnel is the situation of inclined shaft or horizontal hole three scope of operations entering the two holes of two-wire, utilize the positive hole of certain-length that air compartment is set.Further, in the air compartment construction sequence, at first construct inclined shaft or horizontal hole, construction the first transverse passage-way that links to each other with inclined shaft or horizontal hole is offered the second transverse passage-way at the primary importance place apart from the first transverse passage-way certain distance, and is entered right line construction from left line thus, after right line and the perforation of the first transverse passage-way, turn to the right line end work plane of construction, construction is to being that the second place place of certain distance opens the 3rd transverse passage-way apart from the first transverse passage-way, utilizes the positive hole of right line between the first transverse passage-way and the 3rd transverse passage-way as air compartment.Distance between the first transverse passage-way and the second transverse passage-way is 88m, and the distance between the first transverse passage-way and the 3rd transverse passage-way is 888m.Air compartment length is 860m, and cross-sectional area is 104.18m
2
Further, air compartment storage air quantity is greater than 2000m
3
For guaranteeing the solely wind supply quantity of head driving tunnel front of long distance, the applicant has carried out scientific and technical innovation, has adopted air chimney to add the method for air compartment relay, has greatly improved the face-airing situation.The method is utilized air compartment end blower fan swabbing action, produces pressure differential, so that air flows in the air compartment, reaches the purpose of ventilation.By this principle, with the increase of tunnel piercing length always can enlarge forward, prolong air compartment length, and air leak rate of air curtain is almost nil in air compartment, can greatly improve only Excavation Length.And technique is simple, and constructing operation is convenient; Energy consumption is low, and construction cost is low, and ventilation effect is good; Performance of mixtures is simplified, and has reduced a large amount of airducts and has installed, and the facilities such as air door, air channel, Ventilator Room need be set, and installs simply, and workable, maintenance is convenient.
Description of drawings
Fig. 1 is that schematic diagram is arranged without the auxiliary tunnel chamber ventilated in two-wire list hole;
Fig. 2 is that schematic diagram is arranged without the auxiliary tunnel chamber ventilated in the two holes of two-wire;
Fig. 3 is the ventilation layout schematic diagram that two scope of operation situations in the two holes of two-wire are advanced in inclined shaft or horizontal hole;
Fig. 4 is the ventilation layout schematic diagram that four scope of operation situations in the two holes of two-wire are advanced in inclined shaft or horizontal hole;
Fig. 5 is air compartment ventilation construction flow chart;
Fig. 6 is the ventilation layout schematic diagram that three scope of operation situations in the two holes of two-wire are advanced in inclined shaft or horizontal hole;
Fig. 7 is positive hole brattice schematic diagram.
Among the figure: 1-2 platform 2 * 132KW ventilation fan; The 2-inclined shaft; The 3-air chimney; The 4-jet blower; The dirty wind of 5-is discharged direction; 6-shaft bottom transverse passage-way brattice; The left line of 7-Chongqing end ventilation fan; The left line of 8-Chongqing end; The right line of 9-Chongqing end; 10-the first transverse passage-way; The 11-air compartment; 12-the second transverse passage-way; 13-the second transverse passage-way brattice; The left line of 14-Lanzhou end ventilation fan; The positive hole of the right line of 15-brattice; The right line of 16-Lanzhou end ventilation fan; The right line of 17-Lanzhou end; 18-the 3rd transverse passage-way; The positive hole of 19-air chimney; The left line of 20-Lanzhou end; 21-ventilation fan shaped steel frame; 22-tunnel center line; 23-leaves a door unlocked in advance; H1=5000mm; H2=8290mm.
The specific embodiment
In order to improve the effect of long inclined shaft longer face-airing of only head driving in super long tunnel, the applicant is large for this project edpth of tunnel in Lan Yu Railway WEST QINLING super long tunnel engineering sieve family reason inclined shaft of undertaking the construction of ventilates construction, left line construction 5016.95m, right line 2637.05m, positive hole becomes 85 ° 58 ' 58 with inclined shaft " intersect; and inclined shaft plagioclase 2473m, discrepancy in elevation 278m.Simultaneously to three air supply of working faces, the air feed effect directly affects construction safety and progress to construction ventilation by the shaft bottom air compartment.Below, just take the concrete construction method of applicant in Lan Yu Railway WEST QINLING super long tunnel engineering sieve family reason inclined shaft ventilates construction as example, describe inclined shaft of the present invention or horizontal hole in detail and advance the air compartment relay ventilation method of three scope of operation situations in the two holes of two-wire, referring to Fig. 5 and Fig. 6.
One, preparation of construction
1, with similar slope construction, the comparison of investigating, research and design ventilation scheme.
2, with according to on-site actual situations, consider windage, invisible waste, the oxygen demand such as the manpower that is equipped with according to the scene, machinery are utilized the theoretical wind supply quantity of empirical formula evaluation work face, guarantee enough oxygen-supplying amounts of constructor.
3, according to result of calculation, the air compartment size of making rational planning for, the preparation human and material resources carry out air compartment and perform.
4, buy gas detecting instrument, spot-check at any time the ventilation effect of work plane, special ventilation teams and groups are set, carry out regular maintenance and the maintenance of air pipeline, and strengthen the patrol of air compartment, check the situation such as firm of air compartment partition wall.
Two, air compartment construction
The construction inclined shaft 2 that faces down from ground, coupled construction the first transverse passage-way 10.Ventilate for strengthening, offering the second transverse passage-way 12 apart from the first transverse passage-way 10 for the primary importance place of 88m, and enter right line construction from left line thus, after right line and 10 perforations of the first transverse passage-way, turn to the right line end work plane of construction, construction extremely distance the first transverse passage-way 10 utilizes the positive hole of right line of 18 of the first transverse passage-way 10 and the 3rd transverse passage-ways as air compartment 11 for the second place place of 888m opens the 3rd transverse passage-way 18.It is emphasized that, in Lan Yu Railway WEST QINLING super long tunnel engineering sieve family reason inclined shaft ventilated construction, the distance between the first transverse passage-way 10 and the second transverse passage-way 12 was 88m, and the distance between the first transverse passage-way 10 and the 3rd transverse passage-way 18 is 888m, air compartment length is 860m, and cross-sectional area is 104.18m
2But the first transverse passage-way 10, the second transverse passage-way 12 and the 3rd transverse passage-way 18 distance each other are to determine according to the concrete condition of job site, and the foundation of determining is exactly to guarantee that air compartment storage air quantity is greater than 2000m
3
Lay the twice air chimney of diameter 1.8m at the inclined shaft vault, by a plurality of transverse passage-ways of construction, fresh air is delivered to air compartment in the shaft bottom, draw fresh air to each work plane from air compartment.
Air compartment adopts to grout with steel plate is combined, and with grouting the shutoff with the cavern, top 3mm steel plate, steel plate and country rock contact surface be with shutoff such as cotton yarns at construction transverse passage-way place, and seals with mortar or sprayed mortar; Positive hole section is directly made air door with steel plate, and sealing is with the construction transverse passage-way, and blower rack is located on the shaped steel frame, firm supporting; In the air chimney corner, be made into air chimney with steel plate, smooth-going excessive, reduce resistance.
In the shaft bottom the left line end of the first transverse passage-way with mortar flag stone with its shutoff to haunch, with the vault sealing, and reserve three holes with the steel plate 6 of 3mm, two place's holes are with twice air chimney access of inclined shaft, another place installs blower fan 7.The positive hole of right line end air compartment utilizes the steel plate 15 of 3mm with the full section sealing in positive hole, stays the conduct a survey passage of the situations such as blast in the air compartment, blower fan of an iron gate 6 usefulness, reserves two holes as ventilation fan position 14 and 16.
Three, air compartment ventilates
After air compartment forms, blower fan 7 at left line end construction transverse passage-way place draws fresh air and supplies left line end work plane, at right line air compartment brattice place, one group of ventilation fan 14 carries out left line end 20 face-airings by the 3rd transverse passage-way 18, and another group ventilation fan 16 directly carries out right line end 17 face-airings.Along with the forward driving of work plane, continuous spreading air chimney, and according to the length of only driving, suitably increase air compartment.
Four, ventilation effect inspection
Utilize the equipment such as Digital Dust Testing Instrument, KT-601 type gas detection alarm (oxygen), telaire-7001 type carbon dioxide detector, Z-700 type nitrogen oxide detector, check the ventilation effect of each work plane, specifically see Table 1 and table 2.
Gas detects summary sheet 1
Anemometry table 2
Five, ventilation does not meet the demands
When the face-airing situation is poor, analyze ventilation system, revise the ventilation parameter.Begin to check from air compartment, check the sealing situation of air compartment, whether have leak out, loosening phenomenon, whether enlarge air compartment, reduce air chimney length, resistance; Whether check air pipeline, whether the irregularity place is arranged, increase flowing resistance, have airduct to break, leaking out affects air supply of working face.
Six, increase the excavation mileage
Ventilation effect satisfies the work plane needs, then increases the excavation mileage.By this principle, with the increase of tunnel piercing length always can enlarge forward, prolong air compartment length, and air leak rate of air curtain is almost nil in air compartment, can greatly improve only Excavation Length.
Although the above has been described with reference to the drawings embodiments of the invention, it will be understood by those skilled in the art that in the situation that does not break away from the scope of the invention and spirit, can make various modifications and variations to the present invention.Therefore, should be appreciated that the above embodiments are not restrictions, but the illustrating of various aspects.
Claims (7)
1. only driving tunnel of long distance air compartment relay ventilation method may further comprise the steps:
Preparation of construction;
Air compartment construction is taked steel plate to be divided into air compartment on the tunnel or is utilized the positive hole of certain-length that air compartment is set in the section certain limit;
Air compartment ventilates, and utilizes air chimney and blower fan that fresh air is delivered to air compartment, again by air compartment draw fresh air to the tunnel each work plane;
The ventilation effect inspection of each work plane when ventilation effect does not satisfy the work plane needs, is analyzed ventilation system, revises the ventilation parameter, checks wind chamber sealing situation and air pipeline; When ventilation effect satisfies the work plane needs, increase the excavation mileage.
2. air compartment relay ventilation method according to claim 1, wherein when to be two-wire list hole without auxiliary cavern, the two holes of two-wire advance the situation of two scope of operations in two-wire list hole or the two holes of two-wire or four scope of operations without auxiliary cavern or inclined shaft or horizontal hole in the tunnel, on the tunnel, take steel plate to be divided into air compartment in the section certain limit.
3. air compartment relay ventilation method according to claim 1 wherein when the tunnel is the situation of inclined shaft or horizontal hole three scope of operations entering the two holes of two-wire, utilizes the positive hole of certain-length that air compartment is set.
4. air compartment relay ventilation method according to claim 3, wherein in the air compartment construction sequence, at first construct inclined shaft or horizontal hole, construction the first transverse passage-way links to each other with inclined shaft or horizontal hole, offer the second transverse passage-way at the primary importance place apart from the first transverse passage-way certain distance, and enter right line construction from left line thus, after right line and the perforation of the first transverse passage-way, turn to the right line end work plane of construction, construction is to being that the second place place of certain distance opens the 3rd transverse passage-way apart from the first transverse passage-way, utilizes the positive hole of right line between the first transverse passage-way and the 3rd transverse passage-way as air compartment.
5. the described air compartment relay ventilation method of any one in 4 according to claim 1, wherein air compartment storage air quantity is greater than 2000m
3
6. air compartment relay ventilation method according to claim 4, wherein the distance between the first transverse passage-way and the second transverse passage-way is 88m, the distance between the first transverse passage-way and the 3rd transverse passage-way is 888m.
7. air compartment relay ventilation method according to claim 4, wherein air compartment length is 860m, cross-sectional area is 104.18m
2
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010587780 CN102080560B (en) | 2010-12-15 | 2010-12-15 | Tunnel wind room relay ventilation method for long blind heading |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010587780 CN102080560B (en) | 2010-12-15 | 2010-12-15 | Tunnel wind room relay ventilation method for long blind heading |
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| CN102080560A CN102080560A (en) | 2011-06-01 |
| CN102080560B true CN102080560B (en) | 2013-03-13 |
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| CN 201010587780 Expired - Fee Related CN102080560B (en) | 2010-12-15 | 2010-12-15 | Tunnel wind room relay ventilation method for long blind heading |
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| CN104806281B (en) * | 2015-03-04 | 2017-02-22 | 中铁十七局集团第二工程有限公司 | Inclined shaft ventilation based high pressure air supply system in long tunnel hole |
| CN107387145B (en) * | 2017-08-04 | 2023-09-15 | 西南交通大学 | Long-long tunnel ventilation system with long-distance air supply function |
| CN109667614B (en) * | 2018-12-18 | 2021-03-12 | 中铁十六局集团有限公司 | Relay type ventilation method for long-distance tunnel |
| CN111677542A (en) * | 2020-04-05 | 2020-09-18 | 中铁二院工程集团有限责任公司 | Integral special-shaped air duct for long-distance tunnel construction ventilation and construction method |
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| CN113685218B (en) * | 2021-08-31 | 2023-06-16 | 中铁二院工程集团有限责任公司 | Tunnel air supply system based on oxygen-enriched air storage air oxygenation |
| CN113685219B (en) * | 2021-08-31 | 2023-07-25 | 中铁二院工程集团有限责任公司 | Tunnel push-in type ventilation relay system |
| CN113898395B (en) * | 2021-11-09 | 2024-10-08 | 中煤第三建设（集团）有限责任公司 | Ventilating method and ventilating system for special inclined shaft of coal mine |
| CN116357373B (en) * | 2023-04-28 | 2024-08-20 | 中铁四局集团有限公司 | Method for ventilating tunnel cross tunnel construction in high-altitude area |
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Inventor after: Dou Xiaotian Inventor after: Yang Yanling Inventor after: Zhao Jintian Inventor after: Chen Qinghuai Inventor after: He Zhihong Inventor after: Li Zhankui Inventor after: Hu Yongqiang Inventor after: Li Zhijun Inventor after: Chen Dajun Inventor after: Zhang Xuejun Inventor before: Dou Xiaotian Inventor before: Zhao Jintian Inventor before: Chen Qinghuai Inventor before: He Zhihong Inventor before: Li Zhankui Inventor before: Hu Yongqiang Inventor before: Chen Dajun Inventor before: Zhang Xuejun |
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