CN111425237B - Staged ventilation method based on complex cavern group construction - Google Patents
Staged ventilation method based on complex cavern group construction Download PDFInfo
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- CN111425237B CN111425237B CN202010245552.4A CN202010245552A CN111425237B CN 111425237 B CN111425237 B CN 111425237B CN 202010245552 A CN202010245552 A CN 202010245552A CN 111425237 B CN111425237 B CN 111425237B
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- 238000009423 ventilation Methods 0.000 title claims abstract description 62
- 238000010276 construction Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000005641 tunneling Effects 0.000 claims abstract description 28
- 238000009412 basement excavation Methods 0.000 description 4
- 238000013022 venting Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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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
- E21F1/006—Ventilation at the working face of galleries or tunnels
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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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Abstract
A staged ventilation method based on complex cavern group construction comprises the following steps of S1: tunneling and forced ventilation are adopted in the inclined shaft channel, and air supply stop points reach an inlet of a No. 3 subchannel and an outlet of a No. 4 subchannel; s2: the air supply stop point reaches the inlet of the No. 2 subchannel, the outlet of the No. 7 subchannel and the outlet of the triple arch section close to the No. 4 subchannel; s3: the air supply stop point directly reaches the tunnel section at the corresponding end, the triple arch section and the tunnel section at the corresponding end, and the tunnel section and the triple arch section at the corresponding end; s4: the air supply stop point of the No. a inclined shaft channel further reaches the outlet of the No. 3 branch channel; s5: continuing adopting the tunneling and pressing-in type ventilation; s6: a c-shaped vertical shaft channel and a d-shaped vertical shaft channel are arranged in a middle chamber of the triple arch section, and press-in type ventilation and pull-out type ventilation are combined. The method has the advantages of ensuring the construction period, improving the construction quality and the construction safety, meeting the ventilation requirement of construction operation at each stage, saving energy and reducing consumption.
Description
Technical Field
The invention mainly relates to a ventilation technology for complex cavern group construction, in particular to a staged ventilation method based on complex cavern group construction.
Background
The underground building area of the great wall station of the octada mountain is 36143 square meters, and the underground station is the underground excavation station with the largest scale in the world at present. The transition sections at two ends of the station are single-hole tunnels, the maximum excavation span is 32.7 meters, the excavation area is 494.4 square meters, and the tunnel is a subsurface excavation railway tunnel with the largest span at home at present. 78 various caverns are designed in the station, the section type is up to 88, the cross nodes are dense, the intersecting surfaces are multiple, 63 intersecting surfaces of different caverns in the station are total, and meanwhile, the station and transition sections at two ends are constructed by No. 2 inclined shaft tissues, and 8 branch passages are arranged. No. 1, 8 divide passageway construction station both ends positive tunnels, No. 2, No. 3, 7 divide passageway construction to stride across the changeover portion greatly, No. 4, No. 5, 6 divide passageway construction station, and 13 working faces of total work of construction peak period are worked simultaneously, and the hole crowd effect is obvious, and the commodity circulation is organized complicacy, and the construction is organized the difficulty, and the ventilation requires height.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a staged ventilation method based on complex cavern group construction, which can ensure the construction period, improve the construction quality and the construction safety, meet the ventilation requirements of construction operation at each stage, save energy and reduce consumption.
In order to solve the technical problems, the invention adopts the following technical scheme:
a staged ventilation method based on construction of a complex cavern group is characterized in that the complex cavern group comprises tunnel sections at two ends and a triple arch section in the middle, a variable span section is connected between the triple arch section and the tunnel section at the corresponding end, chambers at one side of the triple arch section are communicated with a No. 1 branch channel, a No. 2 branch channel, a No. 3 branch channel, a No. 4 branch channel and a No. 5 branch channel, the tunnel section at one end is communicated with a No. 6 branch channel, the tunnel section at the other end is communicated with a No. 7 branch channel, the No. 4 branch channel and the No. 7 branch channel are both communicated with the No. 5 branch channel, the complex cavern group further comprises an a inclined shaft channel and a b inclined shaft channel, the a inclined shaft channel is communicated with the No. 1 branch channel, the No. 2 branch channel, the No. 3 branch channel, the No. 6 branch channel and the tunnel section at the end, and the b inclined shaft channel is communicated with the No. 5 branch channel; the staged ventilation method includes the steps of:
s1: axial flow fans are arranged at the openings of the No. a inclined shaft channel and the No. b inclined shaft channel, and are used for simultaneously tunneling and pressing-in ventilation, wherein the air supply dead point of the No. a inclined shaft channel reaches the inlet of the No. 3 subchannel, and the air supply dead point of the No. b inclined shaft channel reaches the outlet of the No. 4 subchannel;
s2: continuing to adopt the forced ventilation while tunneling, wherein the air supply dead center of the No. a inclined shaft channel reaches the inlet of the No. 2 subchannel; the air supply stop point of the No. b inclined shaft channel reaches the outlet of the No. 7 branch channel and reaches the outlet of the triple arch section close to the No. 4 branch channel through the No. 4 branch channel;
s3: continuously adopting press-in ventilation while tunneling, wherein an air supply stop point of the No. a inclined shaft channel directly reaches a tunnel section at a corresponding end and also reaches a triple arch section and a tunnel section at a corresponding end through a No. 2 subchannel and a No. 6 subchannel, and an air supply stop point of the No. b inclined shaft channel reaches the tunnel section at a corresponding end and the triple arch section through a No. 7 subchannel and a No. 4 subchannel;
s4: continuing to adopt the forced ventilation while tunneling, wherein the air supply dead point of the No. a inclined shaft channel further reaches the outlet of the No. 3 branch channel;
s5: continuing adopting the tunneling and pressing-in type ventilation;
s6: a C-type vertical shaft channel and a d-type vertical shaft channel which are communicated with the ground surface are arranged in a middle cavern of the triple arch section, and the combination of simultaneous tunneling and forced ventilation and simultaneous tunneling and extraction type ventilation is adopted.
As a further improvement of the above technical solution:
in step S1, an axial flow fan is provided at each of the inlets of the a-type inclined shaft passage and the b-type inclined shaft passage to supply fresh air, and dirty air is discharged from the a-type inclined shaft passage and the b-type inclined shaft passage.
In step S2, an axial flow fan is added at the inlet of the inclined shaft passage b to supply fresh air, and dirty air is exhausted from the inclined shaft passage a and the inclined shaft passage b.
In step S3, an axial flow fan is added at the inlet of the inclined shaft passage a to supply fresh air, and dirty air is exhausted from the inclined shaft passage a and the inclined shaft passage b.
In step S6, exhaust fans are provided at the outlets of the c-shaft passage and the d-shaft passage, respectively, and dirty air is exhausted from the c-shaft passage and the d-shaft passage.
Compared with the prior art, the invention has the advantages that:
according to the staged ventilation method based on complex cavern group construction, the press-in ventilation is carried out along with the tunneling process in the 1-5 stages, the press-out ventilation combining the press-in ventilation while tunneling and the draw-out ventilation while tunneling is adopted in the 6 stages, the purposes of meeting the ventilation requirement of construction operation in each stage of the complex cavern group and saving energy and reducing consumption are achieved, the construction period is ensured, and the construction quality and the construction safety are improved.
Drawings
Fig. 1 is a schematic view of the first stage of ventilation of the present invention.
Fig. 2 is a schematic view of the second stage of ventilation of the present invention.
Fig. 3 is a schematic view of the venting of the third stage of the present invention.
Fig. 4 is a schematic view of the venting of the fourth stage of the present invention.
Fig. 5 is a schematic view of the venting of the fifth stage of the present invention.
Fig. 6 is a schematic view of the venting of the sixth stage of the invention.
Fig. 7 is a flow chart of the present invention.
The reference numerals in the figures denote:
1. a tunnel segment; 2. a triple arch segment; 3. changing the span; 4. 1, dividing channels; 5. channel division No. 2; 6. channel division No. 3; 7. channel division No. 4; 8. channel division No. 5; 9. channel division No. 6; 10. channel division No. 7; 11. a number of inclined shaft channels; 12. a No. b inclined shaft channel; 13. c, a vertical shaft channel; 14. shaft passage number d.
Detailed Description
The invention will be described in further detail below with reference to the drawings and specific examples.
Fig. 1 to 7 show an embodiment of a staged ventilation method based on complex cavern group construction of the present invention, the complex cavern group includes tunnel sections 1 at both ends and a middle triple-arch section 2, a variable span section 3 is connected between the triple-arch section 2 and the tunnel section 1 at the corresponding end, chambers at one side of the triple-arch section 2 are communicated with a No. 1 branch passage 4, a No. 2 branch passage 5, a No. 3 branch passage 6, a No. 4 branch passage 7 and a No. 5 branch passage 8, the tunnel section 1 at one end is communicated with a No. 6 branch passage 9, the tunnel section 1 at the other end is communicated with a No. 7 branch passage 10, both the No. 4 branch passage 7 and the No. 7 branch passage 10 are communicated with a No. 5 branch passage 8, the complex cavern group further includes an inclined shaft passage a 11 and an inclined shaft passage b 12, the inclined shaft passage a 11 is communicated with the No. 1 branch passage 4, the No. 2 branch passage 5, the No. 3 branch passage 6, the No. 6 branch passage 9 and the tunnel section 1 at the end, the No. b inclined shaft channel 12 is communicated with the No. 5 branch channel 8; the staged ventilation method comprises the following steps:
s1: axial flow fans are arranged at the holes of the No. a inclined shaft channel 11 and the No. b inclined shaft channel 12, and are used for simultaneously tunneling and press-in ventilation, the air supply dead point of the No. a inclined shaft channel 11 reaches the inlet of the No. 3 subchannel 6, and the air supply dead point of the No. b inclined shaft channel 12 reaches the outlet of the No. 4 subchannel 7;
s2: continuing to adopt the forced ventilation while tunneling, wherein an air supply stop point of the No. a inclined shaft channel 11 reaches an inlet of the No. 2 subchannel 5; the air supply dead center of the No. b inclined shaft channel 12 reaches the outlet of the No. 7 branch channel 10 and reaches the outlet of the triple arch section 2 close to the No. 4 branch channel 7 through the No. 4 branch channel 7;
s3: the method is characterized in that the forced ventilation is continuously carried out while tunneling, the air supply stop point of the No. a inclined shaft channel 11 directly reaches the tunnel section 1 of the corresponding end and also reaches the triple arch section 2 and the tunnel section 1 of the corresponding end through the No. 2 subchannel 5 and the No. 6 subchannel 9, and the air supply stop point of the No. b inclined shaft channel 12 reaches the tunnel section 1 and the triple arch section 2 of the corresponding end through the No. 7 subchannel 10 and the No. 4 subchannel 7;
s4: continuing to adopt the forced ventilation while tunneling, wherein an air supply stop point of the No. a inclined shaft channel 11 further reaches an outlet of the No. 3 subchannel 6;
s5: continuing adopting the tunneling and pressing-in type ventilation;
s6: a c-shaped vertical shaft channel 13 and a d-shaped vertical shaft channel 14 which are communicated with the ground surface are arranged in a middle cavern of the triple arch section 2, and the combination of pressure-in ventilation while tunneling and extraction ventilation while tunneling is adopted.
According to the method, the press-in type ventilation is carried out along with the tunneling process in the 1-5 stages, and the press-out type ventilation combining the press-in type ventilation while tunneling and the draw-out type ventilation while tunneling is adopted in the 6 stages, so that the ventilation requirements of construction operation in each stage of a complex cavern group and the purposes of energy conservation and consumption reduction are met, the construction period is ensured, and the construction quality and the construction safety are improved.
In this embodiment, in step S1, an axial flow fan is provided at each of the inlets of the inclined shaft passage a 11 and the inclined shaft passage b 12 to supply fresh air, and dirty air is discharged from the inclined shaft passage a 11 and the inclined shaft passage b 12. The stage adopts a press-in type ventilation mode, and the operation is convenient.
In this embodiment, in step S2, an axial flow fan is additionally provided at the inlet of the inclined shaft passage b 12 to supply fresh air, and dirty air is discharged from the inclined shaft passage a 11 and the inclined shaft passage b 12. The stage adopts a press-in type ventilation mode, and the operation is convenient.
In this embodiment, in step S3, an axial flow fan is additionally provided at the inlet of the a-type inclined shaft duct 11 to supply fresh air, and dirty air is discharged from the a-type inclined shaft duct 11 and the b-type inclined shaft duct 12. The stage adopts a press-in type ventilation mode, and the operation is convenient.
In this embodiment, in step S6, exhaust fans are provided at the outlets of the c-shaft passage 13 and the d-shaft passage 14, respectively, and dirty air is exhausted from the c-shaft passage 13 and the d-shaft passage 14. The stage adopts a combination mode of press-in ventilation and outlet ventilation, and the operation is convenient.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (5)
1. The staged ventilation method based on construction of the complex cavern group is characterized in that the complex cavern group comprises tunnel sections (1) at two ends and a middle triple arch section (2), a variable span section (3) is connected between the triple arch section (2) and the tunnel section (1) at the corresponding end, a cavern at one side of the triple arch section (2) is communicated with a branch passage (4) No. 1, a branch passage (5) No. 2, a branch passage (6) No. 3, a branch passage (7) No. 4 and a branch passage (8) No. 5, the tunnel section (1) at one end is communicated with a branch passage (9) No. 6, the tunnel section (1) at the other end is communicated with a branch passage (10) No. 7, the branch passage (7) No. 4 and the branch passage (10) No. 7 are both communicated with a branch passage (8), the complex cavern group further comprises an inclined shaft passage (11) No. a and an inclined shaft passage (12) No. b, and the inclined shaft passage (11) and the branch passage (4) No. 1, The No. 2 branch channel (5), the No. 3 branch channel (6), the No. 6 branch channel (9) and the tunnel section (1) close to the end of the No. 6 branch channel (9) are communicated, and the No. b inclined shaft channel (12) is communicated with the No. 5 branch channel (8); the staged ventilation method includes the steps of:
s1: axial flow fans are arranged at the hole openings of the No. a inclined shaft channel (11) and the No. b inclined shaft channel (12), the forced ventilation is carried out while tunneling, the air supply stop point of the No. a inclined shaft channel (11) reaches the inlet of the No. 3 subchannel (6), and the air supply stop point of the No. b inclined shaft channel (12) reaches the outlet of the No. 4 subchannel (7);
s2: the method is characterized in that the forced ventilation is continuously carried out while tunneling, and the air supply stop point of the No. a inclined shaft channel (11) reaches the inlet of the No. 2 subchannel (5); the air supply stop point of the No. b inclined shaft channel (12) reaches the outlet of the No. 7 branch channel (10) and reaches the outlet of the triple arch section (2) close to the No. 4 branch channel (7) through the No. 4 branch channel (7);
s3: the method is characterized in that the forced ventilation is continuously carried out while tunneling, the air supply stop point of the No. a inclined shaft channel (11) directly reaches the tunnel section (1) at the corresponding end and also reaches the triple arch section (2) and the tunnel section (1) at the corresponding end through the No. 2 subchannel (5) and the No. 6 subchannel (9), and the air supply stop point of the No. b inclined shaft channel (12) reaches the tunnel section (1) and the triple arch section (2) at the corresponding end through the No. 7 subchannel (10) and the No. 4 subchannel (7);
s4: the method is characterized in that the forced ventilation is continuously carried out while tunneling, and the air supply stop point of the No. a inclined shaft channel (11) further reaches the outlet of the No. 3 subchannel (6);
s5: continuing adopting the tunneling and pressing-in type ventilation;
s6: a c-shaped vertical shaft channel (13) and a d-shaped vertical shaft channel (14) which are communicated with the ground surface are arranged in a middle cavern of the triple arch section (2), and the combination of press-in ventilation and pull-out ventilation during tunneling is adopted.
2. The staged ventilation method based on complex grotto group construction, according to claim 1, is characterized in that: in step S1, an axial flow fan is provided at each of the inlets of the a-type inclined shaft passage (11) and the b-type inclined shaft passage (12) to supply fresh air, and dirty air is discharged from the a-type inclined shaft passage (11) and the b-type inclined shaft passage (12).
3. The staged ventilation method based on complex grotto group construction as claimed in claim 2, wherein: in step S2, an axial flow fan is added at the inlet of the inclined shaft passage b (12) to supply fresh air, and dirty air is exhausted from the inclined shaft passage a (11) and the inclined shaft passage b (12).
4. The staged ventilation method based on complex grotto group construction as claimed in claim 3, wherein: in step S3, an axial flow fan is added at the inlet of the a-type inclined shaft passage (11) to supply fresh air, and dirty air is discharged from the a-type inclined shaft passage (11) and the b-type inclined shaft passage (12).
5. The staged ventilation method based on complex grotto group construction, according to claim 4, is characterized in that: in step S6, exhaust fans are provided at the outlets of the c-shaft passage (13) and the d-shaft passage (14), respectively, and dirty air is exhausted from the c-shaft passage (13) and the d-shaft passage (14).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010245552.4A CN111425237B (en) | 2020-03-31 | 2020-03-31 | Staged ventilation method based on complex cavern group construction |
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| CN202010245552.4A CN111425237B (en) | 2020-03-31 | 2020-03-31 | Staged ventilation method based on complex cavern group construction |
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| CN111425237B true CN111425237B (en) | 2022-01-11 |
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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 |
| CN101761352A (en) * | 2010-01-13 | 2010-06-30 | 中铁隧道集团有限公司 | Ventilation method for inclined well and construction workface in tunnel construction |
| CN105240041A (en) * | 2015-11-17 | 2016-01-13 | 中国长江三峡集团公司 | Ventilating smoke dissipating system used for underground cavern construction of large hydropower station |
| CN205742111U (en) * | 2016-05-18 | 2016-11-30 | 中国电建集团华东勘测设计研究院有限公司 | A kind of tail adjusts ventilation hole to be combined arrangement with the double safe hole that ventilates |
| CN108756989B (en) * | 2018-07-13 | 2024-04-02 | 中铁十九局集团第六工程有限公司 | Tunnel ventilation system and tunnel ventilation method |
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