CN111502729A - Assembled special-shaped air duct for long-distance tunnel construction ventilation and construction method - Google Patents
Assembled special-shaped air duct for long-distance tunnel construction ventilation and construction method Download PDFInfo
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- CN111502729A CN111502729A CN202010262616.1A CN202010262616A CN111502729A CN 111502729 A CN111502729 A CN 111502729A CN 202010262616 A CN202010262616 A CN 202010262616A CN 111502729 A CN111502729 A CN 111502729A
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- 238000009423 ventilation Methods 0.000 title claims abstract description 32
- 238000010276 construction Methods 0.000 title claims abstract description 30
- 238000009412 basement excavation Methods 0.000 claims abstract description 24
- 238000005192 partition Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 2
- 206010066054 Dysmorphism Diseases 0.000 claims 1
- 238000005422 blasting Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- 230000009323 psychological health Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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Classifications
-
- 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
- E21F1/04—Air ducts
-
- 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
-
- 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
- E21F1/003—Ventilation of traffic tunnels
-
- 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
- E21F1/08—Ventilation arrangements in connection with air ducts, e.g. arrangements for mounting ventilators
-
- 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
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/02—Suspension devices for tubes or the like, e.g. for ventilating ducts
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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)
- Environmental & Geological Engineering (AREA)
- Ventilation (AREA)
Abstract
An assembled special-shaped air duct for long-distance tunnel construction ventilation and a construction method thereof are provided, which can effectively increase the air supply area, increase the ventilation distance, reduce the increase of the section due to the ventilation requirement, increase the auxiliary well or add the auxiliary gallery, and the like, thereby effectively reducing the engineering investment. The special-shaped air duct is characterized in that a customized special-shaped air duct for fresh air flow outside the tunnel to pass through is fixedly arranged at the middle upper part of the auxiliary tunnel, the right-line main tunnel, the transverse channel and the left-line main tunnel or the parallel pilot tunnel, an end partition plate is arranged on a port close to the tunnel excavation face of the right-line main tunnel, the left-line main tunnel or the parallel pilot tunnel to form an air bin, and an air pressing fan and an air duct leading to the tunnel excavation face are arranged outside the air bin. The customized special-shaped air duct is formed by longitudinally butting and splicing customized light air duct unit sections, each customized light air duct unit section is supported on a supporting member which is longitudinally arranged at intervals, and two ends of the supporting member are detachably connected with a tunnel lining structure or a tunnel primary supporting structure of an auxiliary tunnel, a right-line main tunnel, a transverse channel or a left-line main tunnel or a parallel pilot tunnel.
Description
Technical Field
The invention belongs to the technical field of railway tunnels, highway tunnels and municipal tunnel engineering, and particularly relates to an assembled special-shaped air duct for long-distance tunnel construction ventilation.
Background
With the improvement of the national economic level, more and more railways are being planned or about to be planned and constructed, and particularly in western regions of China, a large number of extra-long tunnels appear due to the limitation of complex terrain and geological conditions and the requirement of line trend, so that the extra-long tunnels become a scheme for controlling the whole construction period and even influencing the lines.
At present, most of railway mountain tunnels are constructed by adopting a drilling and blasting method, in order to ensure normal construction environment in a tunnel and guarantee physical and psychological health and life and property safety of operators, ventilation equipment is usually arranged during construction to discharge dust generated by explosive blasting and waste gas generated by construction machinery, so that harmful gases such as gas, hydrogen sulfide and the like are diluted to the concentration of safety, and meanwhile, the requirements of oxygen consumption of the operators and the minimum wind speed in the tunnel are met. The air supply capacity of the ventilation equipment is closely related to the size of the air pipe and the power of the fan, but the air is delivered to the excavation face by the air pipe, and the air quantity is continuously lost along the way due to the inevitable air leakage of the air pipe, so that the air quantity of the excavation face is required to be the same, the longer the air conveying distance is, the larger the air quantity provided by the fan is, and the larger the air pressure is, so that the economic ventilation distance exists, and when the distance reaches a certain length, the ventilation requirement can not be realized under the existing equipment.
In order to shorten the construction period and meet the requirements of construction ventilation, the extra-long tunnels are provided with auxiliary tunnels to realize short-driving of the long tunnels and shorten the ventilation distance, but due to the limitation of topographic conditions, the auxiliary tunnels are poor in condition, long in length and long in construction ventilation distance of some extra-long railway tunnels, and in addition, the efficiency of a fan in a plateau area is reduced, the air supply capacity is reduced, and the conventional air pipe press-in type ventilation is difficult to meet or needs to enlarge the section of the auxiliary tunnels, but the investment is greatly increased.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an assembled special-shaped air duct for long-distance tunnel construction ventilation, so that the air supply area is effectively increased, the ventilation distance is increased, the increase of the section and the increase of auxiliary wells or the addition of auxiliary tunnels due to the ventilation requirement are reduced, and the engineering investment is effectively reduced.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the invention relates to an assembled special-shaped air duct for tunnel long-distance construction ventilation, which comprises auxiliary underground tunnels for supplying air to a right-line main tunnel excavation surface and supplying air to a left-line main tunnel or a parallel pilot tunnel excavation surface through a transverse channel, and is characterized in that: the middle upper parts of the auxiliary gallery, the right-line main tunnel, the transverse channel and the left-line main tunnel or the parallel pilot tunnel are fixedly provided with a customized special-shaped air channel for passing fresh air outside the tunnel, the prefabricated air channel is provided with an end partition plate on the port close to the tunnel excavation face of the right-line main tunnel, the left-line main tunnel or the parallel pilot tunnel to form an air bin, and a press-in fan and an air pipe leading to the tunnel excavation face are arranged outside the air bin; the customized special-shaped air duct is formed by longitudinally butting and splicing customized light air duct unit sections, each customized light air duct unit section is supported on a supporting member which is longitudinally arranged at intervals, and two ends of the supporting member are detachably connected with a tunnel lining structure or a tunnel primary supporting structure of an auxiliary tunnel, a right-line main tunnel, a transverse channel or a left-line main tunnel or a parallel pilot tunnel.
Another technical problem to be solved by the present invention is to provide a method for constructing an assembled special-shaped air duct for long-distance tunnel construction ventilation, which comprises the following steps:
① finishing auxiliary tunnel and transverse channel construction according to normal procedures, and finishing production and processing of customized light air duct unit segments and supporting members outside the tunnel;
②, hoisting the customized light air duct unit segments to a preset position, installing tunnel lining structure installation supporting members to provide support for the prefabricated air duct unit segments, and longitudinally assembling the prefabricated air duct unit segments to form a prefabricated air duct;
③ an end partition plate with an opening is arranged at the end of the prefabricated air duct near the tunnel excavation face, a press-in fan and an air pipe leading to the excavation face are arranged outside the opening of the end partition plate
④ the blower is started to supply air to the excavated surface of each tunnel through the air pipe.
Compared with the existing air pipe press-in type ventilation, the invention has the beneficial effects that:
firstly, the special-shaped air channel is arranged at the upper part of the auxiliary tunnel, the upper space of the auxiliary tunnel is fully utilized, the air supply area is effectively increased by 80 percent compared with the traditional air pipe, the ventilation distance is increased, the increase of the section due to ventilation requirement, the increase of auxiliary wells or the addition of auxiliary tunnels and the like are reduced, and the engineering investment is effectively reduced;
secondly, arranging a transverse support at the middle upper part of the section of the auxiliary tunnel for forming the special-shaped air duct, so that the stress condition of the section is improved;
thirdly, the special-shaped air duct is simple in structure, convenient to construct, prefabricated in a factory, capable of being quickly constructed after the auxiliary gallery is communicated, and small in influence on tunnel construction.
Drawings
The specification includes the following five figures:
fig. 1 is a plan layout view of an assembled special-shaped air duct for long-distance construction ventilation of a tunnel.
Fig. 2 is a cross-sectional view of a front hole of an assembled special-shaped air duct for ventilation in long-distance tunnel construction according to the invention.
Fig. 3 is an enlarged view of a portion a in fig. 2.
Fig. 4 is a cross-sectional view of an auxiliary tunnel of an assembled type special-shaped air duct for ventilation in long-distance tunnel construction according to the present invention.
Fig. 5 is an enlarged view of a portion B in fig. 4.
FIG. 6 is a detailed view of the attachment of a custom lightweight air duct.
Facility, part name and corresponding label in the figure: the system comprises a right line main hole 10, a left line main hole or flat guide 11, an auxiliary gallery 20, an auxiliary gallery hole 21, a transverse channel 22, a customized light air duct 30, a cross beam 31, an inclined strut 32, a connecting bolt 33, a connecting plate 34, an anchoring bolt 35, a connecting base plate 36, a sealing gasket 37, a press-in fan 40, an air pipe 41 and an end partition plate 42.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1 and 4, the assembled special-shaped air duct for long-distance tunnel construction ventilation comprises an auxiliary tunnel 20 for supplying air to a tunnel excavation surface of a right-line main tunnel 10 and supplying air to a tunnel excavation surface of a left-line main tunnel or a parallel pilot tunnel 11 through a transverse channel 22. The auxiliary tunnel 20, the right-line main tunnel 10, the transverse channel 22 and the middle upper part of the left-line main tunnel or the parallel pilot tunnel 11 are fixedly provided with a customized light air duct 30 for fresh air flow outside the tunnel to pass through, an end partition plate 42 is arranged at the port of the tunnel excavation face of the right-line main tunnel 10, the left-line main tunnel or the parallel pilot tunnel 11 of the customized light air duct 30 to form an air bin, and a press-in fan 40 and an air pipe 41 leading to the excavation face are arranged outside the air bin. The customized light air duct 30 is formed by longitudinally butting and splicing customized light air duct unit sections, each prefabricated air duct unit section is supported on a supporting member which is longitudinally arranged at intervals, and two ends of the supporting member are detachably connected with a tunnel lining structure or a tunnel primary supporting structure of the auxiliary gallery 20, the right-line main hole 10, the transverse passage 22 or the left-line main hole or the parallel pilot tunnel 11. Through set up special-shaped wind channel on supplementary gallery upper portion, make full use of supplementary gallery upper portion space effectively increases the air supply area, increases ventilation distance, reduces to increase the section because of the ventilation needs, increase the auxiliary shaft or add supplementary gallery etc. effectively reduces the engineering investment.
Referring to fig. 6, the end of each prefabricated air duct unit segment has an annular flange, two adjacent prefabricated air duct unit segments are detachably connected by bolt assemblies arranged on the annular flanges at intervals in the circumferential direction, and a sealing gasket 37 is arranged between the annular flanges. The bolt assembly generally includes a connecting bolt 33 and a connecting shim plate 36.
Referring to fig. 3 and 5, the support member includes a cross member 31 and diagonal braces 32 connected to both ends thereof, and connection plates 34 are welded to both ends of the cross member 31 and outer ends of the diagonal braces 32 and connected to the tunnel lining structure by anchor bolts 35. The connection part of the inner port of the inclined strut 32 and the cross beam 31 corresponds to a welding connection plate 34, and the pair of connection plates 34 are connected through a connection bolt 33.
① finishing the construction of auxiliary gallery 20 and transverse passage 22 according to normal procedures, and finishing the production and processing of customized light air duct unit segments and supporting members outside the tunnel;
②, hoisting the customized light air duct unit segments to a preset position, installing tunnel lining structure installation support members to provide support for the customized light air duct unit segments, and longitudinally assembling the customized light air duct unit segments to form the customized light air duct 30;
③ an end partition plate 42 with an opening is arranged at the end of the customized light air duct 30 near the tunnel excavation surface, and a press-in fan 40 and an air pipe 41 pointing to the excavation surface are arranged outside the opening of the end partition plate 42
④ the fan 40 is activated to supply air to the tunnel excavation faces through the duct 41.
The foregoing is illustrative of the principles of the present invention and is not intended to limit the invention to the exact construction and operation shown and described, and accordingly, all modifications and equivalents may be resorted to, falling within the scope of the invention.
Claims (4)
1. The utility model provides an assembled dysmorphism wind channel for tunnel long distance construction ventilation, includes supplementary gallery (20) right side line positive hole (10) tunnel excavation face air supply, and through cross passage (22) left side line positive hole or parallel pilot tunnel (11) tunnel excavation face air supply, characterized by: the middle upper parts of the auxiliary gallery (20), the right-line main tunnel (10), the transverse channel (22) and the left-line main tunnel or the parallel pilot tunnel (11) are fixedly provided with a customized light air duct (30) for fresh air flow outside the tunnel to pass through, an end partition plate (42) is arranged on the port of the tunnel excavation surface of the customized light air duct (30) close to the right-line main tunnel (10), the left-line main tunnel or the parallel pilot tunnel (11) to form an air bin, and a press-in fan (40) and an air duct (41) pointing to the excavation surface are arranged outside the air bin; the customized light air duct (30) is formed by longitudinally butting and assembling prefabricated air duct unit sections, each prefabricated air duct unit section is supported on a supporting member which is longitudinally arranged at intervals, and two ends of each supporting member are detachably connected with a tunnel lining structure or a tunnel primary supporting structure of an auxiliary tunnel (20), a right-line main tunnel (10), a transverse channel (22) or a left-line main tunnel or a parallel pilot tunnel (11).
2. The assembled special-shaped air duct for long-distance construction ventilation of the tunnel as claimed in claim 1, wherein: the end opening part of the customized light air duct unit section is provided with an annular flange, two adjacent customized light air duct unit sections are arranged on the annular flange through annular intervals to form detachable connection through a bolt assembly, and a sealing gasket (37) is arranged between the annular flanges.
3. The assembled special-shaped air duct for long-distance construction ventilation of the tunnel as claimed in claim 1, wherein: the supporting member comprises a cross beam (31) and inclined struts (32) connected to two end parts of the cross beam, two end openings of the cross beam (31) and outer end openings of the inclined struts (32) are welded with connecting plates (34), and the connecting plates are connected with the tunnel lining structure through anchor bolts (35); the connection part of the inner port of the inclined strut (32) and the cross beam (31) corresponds to a welding connection plate (34), and the pair of connection plates (34) are connected through a connection bolt (33).
4. The method for constructing the assembled special-shaped air duct for the long-distance construction ventilation of the tunnel according to any one of claims 1 to 3, comprising the following steps:
①, completing the construction of auxiliary gallery (20) and transverse channel (22) according to normal procedures, and completing the production and processing of the customized light air duct unit segment and the supporting member outside the tunnel;
②, hoisting the customized light air duct unit segments to a preset position, installing tunnel lining structure installation supporting members to provide support for the customized light air duct unit segments, and longitudinally assembling the customized light air duct unit segments to form a prefabricated air duct (30);
③ an end partition plate 42 with an opening is arranged at the end of the light air duct 30 close to the tunnel excavation face, a press-in fan 40 and an air pipe 41 pointing to the excavation face are arranged outside the opening of the end partition plate 42
④ the blower 40 is started to supply air to each tunnel excavation face through the air pipe 41.
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CN202010262616.1A CN111502729A (en) | 2020-04-05 | 2020-04-05 | Assembled special-shaped air duct for long-distance tunnel construction ventilation and construction method |
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CN202010262616.1A CN111502729A (en) | 2020-04-05 | 2020-04-05 | Assembled special-shaped air duct for long-distance tunnel construction ventilation and construction method |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112253209A (en) * | 2020-10-21 | 2021-01-22 | 中铁二院工程集团有限责任公司 | Self-adaptive ventilation structure for tunnel construction |
CN112664223A (en) * | 2020-12-24 | 2021-04-16 | 中铁二十局集团第一工程有限公司 | Ventilation structure, construction method thereof and tunnel |
CN113605953A (en) * | 2021-07-28 | 2021-11-05 | 中铁二十三局集团第三工程有限公司 | Tunnel construction ventilation system based on high-pressure air supply and construction method thereof |
CN113685218A (en) * | 2021-08-31 | 2021-11-23 | 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 |
CN114687781A (en) * | 2022-04-06 | 2022-07-01 | 西南交通大学 | Prefabricated partition plate type ventilation device for tunnel construction ventilation and construction method thereof |
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CN110439604A (en) * | 2019-08-16 | 2019-11-12 | 中铁隧道局集团有限公司 | Super-long tunnel construction long range method of ventilation |
CN212225295U (en) * | 2020-04-05 | 2020-12-25 | 中铁二院工程集团有限责任公司 | Assembled special-shaped air duct for long-distance tunnel construction ventilation |
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
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CN112253209A (en) * | 2020-10-21 | 2021-01-22 | 中铁二院工程集团有限责任公司 | Self-adaptive ventilation structure for tunnel construction |
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CN112664223A (en) * | 2020-12-24 | 2021-04-16 | 中铁二十局集团第一工程有限公司 | Ventilation structure, construction method thereof and tunnel |
CN113605953A (en) * | 2021-07-28 | 2021-11-05 | 中铁二十三局集团第三工程有限公司 | Tunnel construction ventilation system based on high-pressure air supply and construction method thereof |
CN113605953B (en) * | 2021-07-28 | 2023-08-25 | 中铁二十三局集团第三工程有限公司 | Tunnel construction ventilation system based on high-pressure air supply and construction method thereof |
CN113685218A (en) * | 2021-08-31 | 2021-11-23 | 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 |
CN114687781A (en) * | 2022-04-06 | 2022-07-01 | 西南交通大学 | Prefabricated partition plate type ventilation device for tunnel construction ventilation and construction method thereof |
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