CN212774370U - Integral special-shaped air duct for long-distance tunnel construction ventilation - Google Patents
Integral special-shaped air duct for long-distance tunnel construction ventilation Download PDFInfo
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- CN212774370U CN212774370U CN202020483959.6U CN202020483959U CN212774370U CN 212774370 U CN212774370 U CN 212774370U CN 202020483959 U CN202020483959 U CN 202020483959U CN 212774370 U CN212774370 U CN 212774370U
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Abstract
An integral special-shaped air duct for ventilation in long-distance tunnel construction is used for effectively increasing the air supply area, increasing the ventilation distance, reducing 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 reducing the engineering investment. The auxiliary tunnel is internally provided with an integral special-shaped air duct which is formed by concrete mold building, and the integral special-shaped air duct consists of an arch part and a side wall part which are lined with the auxiliary tunnel mold building, and a horizontal plate which divides a section into an upper isolation air bin and a lower passage. The integrated special-shaped air channel is provided with a vertical partition plate for sealing the upper isolation air bin at the far end close to the right line main hole, air supply holes are formed in the vertical partition plate at intervals, and an air supply fan and an air pipe for guiding fresh air to the right line main hole, the left line main hole or the parallel pilot tunnel excavation face are installed outside the air supply holes.
Description
Technical Field
The utility model discloses the technique belongs to railway tunnel, highway tunnel, municipal tunnel engineering field, in particular to an integral special-shaped 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 provide an integral special-shaped wind channel for tunnel long distance construction ventilation to effectively increase air supply area, increase ventilation distance, reduce and increase the section because of the ventilation needs, increase the auxiliary shaft or add supplementary gallery etc. effectively reduce the engineering investment.
The utility model provides a technical scheme that above-mentioned technical problem adopted is:
the utility model discloses an integral special-shaped wind channel for tunnel long distance construction ventilation, including the positive hole of right side line, the positive hole of left side line or parallel pilot tunnel to and communicate to the supplementary gallery of the positive hole of right side line, the positive hole of left side line or parallel pilot tunnel are by cross-channel intercommunication, characterized by: an integral special-shaped air channel formed by concrete mold construction is arranged in the auxiliary gallery, and the integral special-shaped air channel consists of an arch part and a side wall part which are lined with the auxiliary gallery mold construction, and a horizontal plate which divides the section into an upper isolation air bin and a lower passage; the integrated special-shaped air channel is provided with a vertical partition plate for sealing the upper isolation air bin at the far end close to the right line main hole, air supply holes are formed in the vertical partition plate at intervals, and an air supply fan and an air pipe for guiding fresh air to the right line main hole, the left line main hole or the parallel pilot tunnel excavation face are installed outside the air supply holes.
Compare with current tuber pipe forced ventilation, the beneficial effect of the utility model mainly faces in following aspect:
firstly, the isolation air bin is arranged at the upper part of the auxiliary tunnel, the upper space of the auxiliary tunnel is fully utilized, compared with the traditional air pipe, the air supply area is effectively increased by 80 percent, the ventilation distance is increased, the section is enlarged due to the ventilation requirement, the auxiliary well is increased or the auxiliary tunnel is additionally arranged, and the engineering investment is effectively reduced;
secondly, a molded concrete horizontal plate with a certain thickness is arranged on the section of the auxiliary tunnel to form the special-shaped air duct, so that the stress condition of the section is improved, and the thickness of the supporting structure of the auxiliary tunnel is reduced;
thirdly, the special-shaped air duct has simple structure, convenient construction and easy material taking.
Drawings
The specification includes the following three drawings:
fig. 1 is the utility model discloses an integral special-shaped wind channel plane arrangement picture for tunnel long distance construction ventilation.
Fig. 2 is a cross sectional view of the integrated special-shaped air duct for tunnel long-distance construction ventilation of the utility model.
Fig. 3 is the end cross section of the integrated special-shaped air duct for tunnel long-distance construction ventilation of the utility model.
Facility, part name and corresponding label in the figure: the tunnel comprises a right-line main tunnel 10, a left-line main tunnel or parallel pilot tunnel 11, an auxiliary tunnel 20, an auxiliary tunnel portal 21, a transverse channel 22, an integral special-shaped air duct 30, an upper isolation air bin 30a, a lower channel 30b, a vertical partition plate 31, an arch part 32, a horizontal plate 33, a side wall part 34, an air supply 35, a press-in fan 40 and an air pipe 41.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Referring to fig. 1 to 3, the utility model discloses a 1 an integral special-shaped wind channel for tunnel long distance construction ventilation, including right side line positive hole 10, left side line positive hole or parallel pilot tunnel 11 to and communicate to the supplementary gallery 20 of right side line positive hole 10, left side line positive hole or parallel pilot tunnel 11 are by cross-channel 22 intercommunication. An integral special-shaped air duct 30 formed by molding concrete is arranged in the auxiliary gallery 20, and the integral special-shaped air duct 30 is composed of an arch part 32 which is molded and lined with the auxiliary gallery 20, a side wall part 34, an upper isolation air bin 30a which divides the cross section, a lower channel 30b and a horizontal plate 33. Namely, the upper isolation air bin 30a is arranged on the upper portion of the auxiliary tunnel 20, the upper space of the auxiliary tunnel 20 is fully utilized, the air supply area is effectively increased, the ventilation distance is increased, the problem that the section is enlarged due to ventilation requirements, auxiliary wells are increased or the auxiliary tunnels are additionally arranged is solved, the engineering investment is effectively reduced, the integral special-shaped air duct 30 simultaneously forms the mold-building concrete with certain thickness on the section of the auxiliary tunnel 20, the stress condition of the section is improved, and the thickness of the supporting structure of the auxiliary tunnel is reduced.
Referring to fig. 1, 2 and 3, the far end of the integral special-shaped air duct 30 close to the right-line main tunnel 10 is provided with a vertical partition plate 31 for closing an upper isolation air bin 30a, air supply holes 35 are arranged on the vertical partition plate 31 at intervals, and an air pressing fan 40 and an air pipe 41 for guiding fresh air to the excavation surface of the right-line main tunnel 10, the left-line main tunnel or the parallel pilot tunnel 11 are arranged outside the air supply holes 35. Generally, the integrated profiled air duct 30 may be disposed along the entire length of the auxiliary gallery 20.
Referring to fig. 1, 2 and 3, the utility model relates to an integral special-shaped wind channel for tunnel long distance construction ventilation is constructed according to following steps:
firstly, after the auxiliary gallery 20 is finished according to the normal working procedure, binding reinforcing steel bars of a lining arch part 32, a side wall part 34 and a horizontal plate 33 of the auxiliary gallery mould;
secondly, pouring concrete of the side wall part 34 and the horizontal plate 33;
thirdly, pouring concrete of the arch part 32 after the concrete of the side wall part 34 and the horizontal plate 33 reaches the design strength;
binding the steel bars of the vertical partition plate 31, pouring concrete, and reserving an air supply hole 35 on the vertical partition plate 31 according to the size of the pressed fan 40;
installing a press-in fan 40 and a corresponding air pipe 41 for supplying air to each excavation surface.
The above is only used for illustrating the present invention, which is not intended to limit the present invention 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.
Claims (2)
1. The utility model provides an integral special-shaped wind channel for tunnel long distance construction ventilation, includes right side line main tunnel (10), left side line main tunnel or parallel pilot tunnel (11) to and supplementary gallery (20) to right side line main tunnel (10), left side line main tunnel or parallel pilot tunnel (11) are by cross passage (22) intercommunication, characterized by: an integral special-shaped air duct (30) formed by concrete moulding is arranged in the auxiliary gallery (20), and the integral special-shaped air duct (30) is composed of an arch part (32) lined with the auxiliary gallery (20) by moulding, a side wall part (34) and a horizontal plate (33) for dividing the section into an upper isolation air bin (30a) and a lower channel (30 b); the far end of the integral special-shaped air duct (30) close to the right line main hole (10) is provided with a vertical partition plate (31) for sealing the upper isolation air bin (30a), air supply holes (35) are formed in the vertical partition plate (31) at intervals, and an air pipe (41) for pressing a fan (40) and guiding fresh air to the excavation surface of the right line main hole (10), the left line main hole or the parallel guide hole (11) is arranged outside the air supply holes (35).
2. The integral special-shaped air duct for long-distance tunnel construction ventilation as claimed in claim 1, is characterized in that: the integral special-shaped air duct (30) is arranged along the whole length of the auxiliary gallery (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020483959.6U CN212774370U (en) | 2020-04-05 | 2020-04-05 | Integral special-shaped air duct for long-distance tunnel construction ventilation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020483959.6U CN212774370U (en) | 2020-04-05 | 2020-04-05 | Integral special-shaped air duct for long-distance tunnel construction ventilation |
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| CN212774370U true CN212774370U (en) | 2021-03-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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2020
- 2020-04-05 CN CN202020483959.6U patent/CN212774370U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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