CN212225295U - Assembled special-shaped air duct for long-distance tunnel construction ventilation - Google Patents
Assembled special-shaped air duct for long-distance tunnel construction ventilation Download PDFInfo
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- CN212225295U CN212225295U CN202020484641.XU CN202020484641U CN212225295U CN 212225295 U CN212225295 U CN 212225295U CN 202020484641 U CN202020484641 U CN 202020484641U CN 212225295 U CN212225295 U CN 212225295U
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Abstract
An assembled special-shaped air channel for long-distance construction ventilation of a tunnel effectively increases the air supply area, increases the ventilation distance, reduces the increase of the section, the increase of auxiliary wells or the addition of auxiliary tunnels and the like due to the ventilation requirement, and effectively reduces 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 utility model discloses the technique belongs to railway tunnel, highway tunnel, municipal tunnel engineering field, in particular to assembled dysmorphism wind channel that is used for tunnel long distance construction to ventilate.
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.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a assembled dysmorphism wind channel for tunnel long distance construction ventilation is provided to effective increase air supply area increases the ventilation distance, reduces because of the ventilation needs increase the section, increase the auxiliary shaft or add supplementary gallery etc. thereby effectively reduce the engineering investment.
The utility model provides an above-mentioned technical problem adopted technical scheme as follows:
the utility model relates to an assembled dysmorphism wind channel for tunnel long distance construction is ventilated, including supplementary gallery right side line positive hole tunnel excavation face air supply, and through the horizontal passage left side line positive hole or parallel pilot tunnel excavation face air supply, characterized by: 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.
Compare with current tuber pipe forced ventilation, the beneficial effects of the utility model mainly embody in following aspect:
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 plane layout diagram of an assembled special-shaped air duct for tunnel long-distance construction ventilation.
Fig. 2 is a front hole cross section diagram of an assembled special-shaped air duct for tunnel long-distance construction ventilation.
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 special-shaped air duct for ventilation in long-distance tunnel construction.
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 present invention will be further explained with reference to the accompanying drawings.
Referring to fig. 1 and 4, the utility model relates to an assembled dysmorphism wind channel for tunnel long distance construction ventilation, including supplementary gallery 20 right side line positive hole 10 tunnel excavation face air supply, and through cross access 22 left side line positive hole or 11 tunnel excavation face air supplies of parallel pilot tunnel. 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.
Referring to fig. 1, the utility model relates to an assembled dysmorphism wind channel for tunnel long distance construction is ventilated builds according to following step: the construction of the auxiliary tunnel 20 and the transverse channel 22 is completed according to the normal working procedures, and the production and the processing of the customized light air duct unit segment and the supporting member are completed outside the tunnel;
hoisting the customized light air duct unit sections to a preset position, installing tunnel lining structure installation supporting members to provide support for the customized light air duct unit sections, and longitudinally assembling the customized light air duct unit sections to form a customized light air duct 30;
thirdly, an end partition plate 42 with an opening is arranged at the port of the customized light air duct 30 close to 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
And fourthly, starting the fan 40 and supplying air to the excavation surfaces of the tunnels through the air pipe 41.
The above is only used for illustrating the present invention, and the present invention is not limited to the specific structure and application range shown and described, so all the corresponding modifications and equivalents that may be utilized belong to the claimed patent scope of the present invention.
Claims (3)
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).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020484641.XU CN212225295U (en) | 2020-04-05 | 2020-04-05 | Assembled special-shaped air duct for long-distance tunnel construction ventilation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020484641.XU CN212225295U (en) | 2020-04-05 | 2020-04-05 | Assembled special-shaped air duct for long-distance tunnel construction ventilation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111502729A (en) * | 2020-04-05 | 2020-08-07 | 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 and construction method |
| CN112832849A (en) * | 2021-03-24 | 2021-05-25 | 中铁二院重庆勘察设计研究院有限责任公司 | Method for removing outburst by combined pumping and drainage of main tunnel and flat guide gas of outburst coal seam with complex structure |
| 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 |
-
2020
- 2020-04-05 CN CN202020484641.XU patent/CN212225295U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111502729A (en) * | 2020-04-05 | 2020-08-07 | 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 and construction method |
| CN112832849A (en) * | 2021-03-24 | 2021-05-25 | 中铁二院重庆勘察设计研究院有限责任公司 | Method for removing outburst by combined pumping and drainage of main tunnel and flat guide gas of outburst coal seam with complex structure |
| 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 |
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