CN212225294U - 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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- CN212225294U CN212225294U CN202020484628.4U CN202020484628U CN212225294U CN 212225294 U CN212225294 U CN 212225294U CN 202020484628 U CN202020484628 U CN 202020484628U CN 212225294 U CN212225294 U CN 212225294U
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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 middle upper parts of the auxiliary gallery, the right line main hole, the transverse channel and the left line main hole or the parallel pilot tunnel are provided with horizontal plates which divide the sections of the auxiliary gallery, the right line main hole, the transverse channel and the left line main hole or the parallel pilot tunnel into an upper special-shaped air channel and a lower channel, the port of the upper special-shaped air channel, which is positioned in the right line main hole, the left line main hole or the parallel pilot tunnel, is sealed by a baffle to form an air bin, and an air pipe which is pressed into a fan and guides fresh air to. The horizontal plate supports on the supporting member that vertical interval set up, and the both ends of supporting member can dismantle with the tunnel lining structure or the tunnel preliminary bracing structure of supplementary gallery, right side line positive hole, cross aisle or left side line positive hole or parallel pilot tunnel and be connected.
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 fresh air is delivered to the excavation face by the air pipe, and the air pipe inevitably leaks, so that the air quantity is continuously lost along the way, and the air quantity provided by the fan is larger as the air quantity of the excavation face is required to be the same, so that the longer the air transportation distance 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 met 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 fabricated special-shaped wind channel for tunnel long distance construction ventilation is provided to effective increase air supply area increases the ventilation distance, reduces and increases the section, increases the auxiliary shaft or add supplementary gallery etc. because of the ventilation needs, thereby effectively reduces 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 ventilation, through supplementary gallery right side line positive 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 hole, the transverse channel and the left line main hole or the parallel pilot tunnel are provided with horizontal plates which divide the cross section of the auxiliary gallery into an upper special-shaped air channel and a lower channel, the port of the upper special-shaped air channel positioned in the right line main hole, the left line main hole or the parallel pilot tunnel is sealed by a baffle plate to form an air bin, and an air pipe which is pressed into a fan and guides fresh air to an excavation surface is arranged outside an air supply hole of the baffle plate; the horizontal plates are supported on supporting members arranged at intervals in the longitudinal direction, 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, a right-line main hole, a transverse channel or a left-line main hole 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, by arranging the special-shaped air duct on 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 duct, 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;
and the isolation air duct has simple structure, convenient construction and easy material taking, can be quickly constructed and finished after the auxiliary gallery is communicated, and has small influence on the 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 cross sectional view of a main hole in an assembled special-shaped air duct for long-distance construction ventilation of a tunnel.
Fig. 3 is a cross sectional view of an auxiliary gallery in an assembled special-shaped air duct for ventilation in long-distance tunnel construction.
Fig. 4 is an enlarged view of a portion a in fig. 2.
Fig. 5 is an enlarged view of a portion B in fig. 4.
Facility, part name and corresponding label in the figure:
the device comprises a right line main hole 10, a left line main hole or flat guide 11, an auxiliary tunnel 20, an auxiliary tunnel hole 21, a transverse channel 22, an upper special-shaped air duct 30, a lower channel 30a, a baffle plate 31, a horizontal plate 32, a cross beam 33, an inclined strut 34, a connecting bolt 35, a connecting plate 36, an anchoring bolt 37, a sealing coiled material 38, a sealing material 39, a press-in fan 40 and an air duct 41.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Referring to fig. 1, 2 and 3, the utility model relates to an assembled dysmorphism wind channel for ventilation of tunnel long distance construction, through 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 11 tunnel excavation faces air supplies of parallel pilot tunnel. The middle upper part of the auxiliary tunnel 20, the right line main tunnel 10, the transverse channel 22 and the left line main tunnel or the parallel pilot tunnel 11 is provided with a horizontal plate 32 which divides the section into an upper special-shaped air duct 30 and a lower channel 30a, the port of the upper special-shaped air duct 30 positioned in the right line main tunnel 10, the left line main tunnel or the parallel pilot tunnel 11 is sealed by a baffle 31 to form an air bin, and an air supply hole of the baffle 31 is externally provided with a press-in fan 40 and an air pipe 41 which guides fresh air to an excavation surface. Namely, the upper special-shaped air duct 30 is arranged on the upper parts of the auxiliary tunnel 20 and the transverse channel 22, so that the upper space is fully utilized, 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 upper special-shaped air duct 30 is simple in structure, convenient to construct, easy to obtain materials, capable of being quickly constructed after the auxiliary gallery is communicated, and small in influence on tunnel construction. The isolation plates 32 are supported on support members which are longitudinally arranged at intervals, two ends of each support member are detachably connected with the tunnel lining structure or the preliminary tunnel supporting structure of the auxiliary tunnel 20, the right-line pilot tunnel 10, the transverse passage 22 or the left-line pilot tunnel or the parallel pilot tunnel 11, and the support members can improve the stress conditions of the sections of the auxiliary tunnel 20 and the transverse passage 22.
Referring to fig. 4 and 5, in order to improve the sealing performance of the upper profiled air duct 30, sealing coils 38 are laid between the two lateral ends of the horizontal plate 32 and the adjacent tunnel lining structure or tunnel preliminary bracing structure, and a covering sealing material 39 is sprayed.
Referring to fig. 4 and 5, the support member includes a cross member 33 and diagonal braces 34 connected to both ends thereof, and two ends of the cross member 33 and outer ends of the diagonal braces 34 are welded to a connection plate 36 and connected to a tunnel lining structure or a preliminary tunnel supporting structure by anchor bolts 37. The connection part of the inner port of the inclined strut 34 and the cross beam 33 corresponds to a welding connection plate 36, and the connection plate 36 is connected through a connection bolt 35.
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:
firstly, completing the construction of the auxiliary tunnel 20 and the transverse channel 22 according to normal procedures, and completing the production and processing of the isolation plate 32 and the supporting member outside the tunnel;
secondly, mounting a support member along the tunnel lining structure or the primary tunnel supporting structure;
thirdly, laying horizontal plates 32 on the supporting members, laying sealing coiled materials 38 and spraying covering sealing materials 39 between the two transverse end parts of the horizontal plates and the adjacent tunnel lining structures or the tunnel primary supporting structures to form upper isolation air ducts 30;
fourthly, installing a baffle 31 outside the port of the upper special-shaped air duct 30 positioned in the right line main hole 10, the left line main hole or the parallel pilot tunnel 11 to form an air bin;
and fifthly, installing a press-in fan 40 and an air pipe 41 guiding fresh air to the excavation surface outside the air supply hole of the baffle plate 31.
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, through 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 provided with horizontal plates (32) which divide the sections of the auxiliary gallery into an upper special-shaped air channel (30) and a lower channel (30a), the ports of the upper special-shaped air channel (30) positioned in the right line main tunnel (10), the left line main tunnel or the parallel pilot tunnel (11) are sealed by baffles (31) to form an air bin, and air supply holes of the baffles (31) are externally provided with air pressing-in fans (40) and air pipes (41) which guide fresh air to an excavation surface; the horizontal plates (32) are supported on supporting members which are arranged at intervals in the longitudinal direction, and two ends of each supporting member are detachably connected with a tunnel lining structure or a primary tunnel 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 fabricated special-shaped air duct for long-distance construction ventilation of the tunnel as claimed in claim 1, wherein: and sealing coiled materials (38) are laid between the two transverse end parts of the horizontal plates (32) and the adjacent tunnel lining structure or the tunnel primary support structure, and a covering sealing material (39) is sprayed.
3. The fabricated 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 (33) and inclined struts (34) connected to two end parts of the cross beam, two end openings of the cross beam (33) and outer end openings of the inclined struts (34) are welded with connecting plates (36), and the connecting plates are connected with a tunnel lining structure or a tunnel primary supporting structure through anchor bolts (37); the connection part of the inner port of the inclined strut (34) and the cross beam (33) corresponds to the welding connection plate (36), and the pair of connection plates (36) are connected through the connection bolt (35).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020484628.4U CN212225294U (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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| CN202020484628.4U CN212225294U (en) | 2020-04-05 | 2020-04-05 | Assembled special-shaped air duct for long-distance tunnel construction ventilation |
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| CN212225294U true CN212225294U (en) | 2020-12-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114135315A (en) * | 2021-11-22 | 2022-03-04 | 中铁十六局集团第三工程有限公司 | Advanced stress release construction method for severe large-deformation tunnel |
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2020
- 2020-04-05 CN CN202020484628.4U patent/CN212225294U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114135315A (en) * | 2021-11-22 | 2022-03-04 | 中铁十六局集团第三工程有限公司 | Advanced stress release construction method for severe large-deformation tunnel |
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