CN218971240U - Tunnel construction ventilation system for plateau area - Google Patents
Tunnel construction ventilation system for plateau area Download PDFInfo
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- CN218971240U CN218971240U CN202223028638.5U CN202223028638U CN218971240U CN 218971240 U CN218971240 U CN 218971240U CN 202223028638 U CN202223028638 U CN 202223028638U CN 218971240 U CN218971240 U CN 218971240U
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Abstract
The utility model discloses a tunnel construction ventilation system in a plateau region, which comprises a cross-hole construction ventilation system, a main tunnel small mileage construction ventilation system and a main tunnel large mileage construction ventilation system. Based on the construction characteristics of tunnel, carry out corresponding optimization to construction ventilation system based on different construction stages, can solve the inside ventilation effect of tunnel in the plateau region tunnel construction problem that is difficult to guarantee well to ventilation system's overall structure is simple, has optimized ventilation system in the efficiency of fan, can reduce the arrangement, the installation quantity of fan, tuber pipe when guaranteeing ventilation effect, reduces the work load of plateau region ventilation system construction, reduces the occupation to tunnel inner space.
Description
Technical Field
The utility model belongs to the technical field of tunnel construction, and particularly relates to a ventilation system for tunnel construction in a plateau area.
Background
Along with the great development of the construction of domestic infrastructures, the railway engineering traffic infrastructures gradually develop from plain areas to mountain areas and plateau areas, the number and mileage of tunnel construction are also longer and longer, and great difficulty is brought to the construction of tunnel construction; meanwhile, the conditions of rarefaction of air, low air pressure, coldness, hypoxia and the like exist in the plateau environment, and great difficulty is brought to the construction of a long-mileage tunnel. Meanwhile, in order to improve the construction efficiency of the tunnel, the number of large engineering machines applied in the tunnel construction is increased, the power of engineering machines is increased, and the ventilation in the tunnel in the construction process of the tunnel in the highland environment is combined with the anoxic environment to ensure that the air circulation in the tunnel is not smooth, the internal operation environment is bad, the oxygen supply is insufficient, the problems of hypoxia of constructors, insufficient fuel combustion of the engineering machines, low operation efficiency of the personnel and the engineering machines and the like are easily caused, so that very high requirements are put forward for the ventilation in the tunnel construction process in the highland environment.
Disclosure of Invention
The utility model aims to provide a ventilation system for tunnel construction in a plateau area, which aims to solve the problem of high difficulty in tunnel ventilation in long-mileage tunnel construction in the plateau area.
The utility model is realized by the following technical scheme:
the tunnel construction ventilation system comprises a transverse tunnel and a positive tunnel communicated with the transverse tunnel, wherein the positive tunnel comprises a positive tunnel left line and a positive tunnel right line which are parallel, and the transverse tunnel is communicated with the positive tunnel left line; the ventilation system comprises a cross-hole construction ventilation system, a hole-in-hole small mileage construction ventilation system and a hole-in-hole large mileage construction ventilation system;
the cross-hole construction ventilation system comprises:
the first fan assembly is arranged at the opening of the transverse hole during construction of the transverse hole;
a transverse hole branch hole communicated with the transverse hole is arranged at a position close to the left line of the positive hole;
the first fan assembly is connected with a first air pipe assembly and supplies air to the tunnel face of the transverse tunnel and the transverse tunnel branch hole through the first air pipe assembly;
the ventilation system for the hole-forming small mileage construction comprises:
the second fan assembly is arranged at the opening of the transverse hole branch hole;
a first auxiliary hole which is communicated with the left line of the positive hole and the right line of the positive hole is arranged at the corresponding position of the transverse hole;
the second fan assembly is connected with a second air pipe assembly, the second air pipe assembly extends into the left main hole line and the right main hole line through the first auxiliary hole, and supplies air to the tunnel face of the left main hole line and the right main hole line through the second air pipe assembly;
the positive tunnel big mileage construction ventilation system includes:
the second auxiliary hole is arranged at intervals with the first auxiliary hole in the big mileage construction direction of the main hole, and the second auxiliary hole is communicated with the left main hole line and the right main hole line;
the third fan assembly is arranged at a position close to the second auxiliary hole in the right line of the positive hole;
the third fan assembly is connected with a third air pipe assembly and supplies air to the tunnel face of the right line and the left line of the main tunnel respectively through the third air pipe assembly.
As a further improvement to the technical scheme, the first fan assembly comprises at least one axial flow fan, and the forced ventilation mode is adopted to supply air to the tunnel face of the transverse tunnel and the transverse tunnel branch tunnel.
As a further improvement to the technical scheme, the first air pipe assembly comprises a first air pipe and a first air pipe branch pipe, wherein the first air pipe extends towards the tunnel face of the transverse tunnel along the axis direction of the transverse tunnel, the first air pipe branch pipe is connected with the first air pipe, and the first air pipe branch pipe extends towards the tunnel face of the transverse tunnel along the axis direction of the branch hole of the transverse tunnel.
As a further improvement to the technical scheme, the second fan assembly comprises at least three axial fans, and the pressure type ventilation mode is adopted to supply air to the tunnel face of the left line of the positive hole and the right line of the positive hole.
As a further improvement to the above technical solution, the second air duct assembly includes a second small mileage main air duct, a second large mileage left line air duct, and a second large mileage right line air duct;
the second small mileage main air pipe extends into the right line of the main hole along the first auxiliary hole, two second small mileage branch air pipes facing to one side of the small mileage direction of the main hole are arranged on the second small mileage main air pipe, and the two second small mileage branch air pipes are respectively arranged along the axial directions of the left line of the main hole and the right line of the main hole and extend to the positions corresponding to the face;
the second large mileage left line air pipe extends towards the construction direction of the large mileage of the main tunnel and is arranged at the position of the large mileage face of the left line of the main tunnel;
and the second large mileage right line air pipe extends to the position of the large mileage face of the main tunnel towards the large mileage construction direction of the main tunnel through the first auxiliary tunnel.
As a further improvement to the technical scheme, the second small mileage main air pipe, the second large mileage left air pipe and the second large mileage right air pipe are respectively connected with one fan in the second fan set.
As a further improvement to the technical scheme, the third fan assembly comprises at least two axial fans, and adopts a roadway ventilation mode to supply air to the tunnel face of the right line and the left line of the positive hole.
As a further improvement to the above technical solution, the third air duct assembly includes a third mileage left air duct and a third mileage right air duct;
the third-mileage left-line air pipe extends to the position of the main tunnel left-line large-mileage face towards the main tunnel large-mileage construction direction through the second auxiliary tunnel;
and the third-range right line air pipe extends towards the construction direction of the main tunnel large range and is arranged at the position of the main tunnel right line large range face.
As a further improvement to the technical scheme, the third-mileage left-line air pipe and the third-mileage right-line air pipe are respectively connected with one fan in the third fan assembly.
As a further improvement to the technical scheme, a choke structural member is arranged at the position, located at the second auxiliary hole, in the right line of the main hole and is used for blocking return air of the face of the right line of the main hole, so that the return air flows back along one side of the left line of the main hole through the second auxiliary hole.
Compared with the prior art, the utility model has the following beneficial effects:
based on the construction characteristics of the tunnel, the construction ventilation system is correspondingly optimized based on different construction stages, the problem that the ventilation effect inside the tunnel is difficult to guarantee in the construction of the tunnel in the plateau region can be well solved, the ventilation system is simple in integral structure, the efficiency of the fan in the ventilation system is optimized, the arrangement and installation quantity of the fan and the air pipe can be reduced while the ventilation effect is ensured, the construction workload of the ventilation system in the plateau region is reduced, and the occupation of the internal space of the tunnel is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly describe the drawings in the embodiments, it being understood that the following drawings only illustrate some embodiments of the present utility model and should not be considered as limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a structural layout of a ventilation system at the stage of tunnel cross-hole construction in the present utility model.
FIG. 2 is a structural layout of the ventilation system at the stage of the hole-in-pit construction in the present utility model.
FIG. 3 is a structural layout of the ventilation system at the construction stage of the main tunnel mileage in the present utility model.
Wherein:
10. the main air duct comprises a transverse hole, 11, a transverse hole branch hole, 21, a positive hole left line small mileage section, 22, a positive hole right line small mileage section, 23, a positive hole left line large mileage section, 24, a positive hole right line large mileage section, 25, a first auxiliary hole, 26, a second auxiliary hole, 31, a first fan assembly, 32, a second fan assembly, 33, a third fan assembly, 41, a first air duct, 42, a first air duct branch pipe, 43, a second small mileage main air duct, 44, a second small mileage branch air duct, 45, a second large mileage left line air duct, 46, a second large mileage right line air duct, 47, a third large mileage left line air duct, 48, a third large mileage right line air duct, 50 and a choke structure.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model.
The ventilation mode of the tunnel in tunnel construction can be generally adopted: the forced ventilation has good ventilation effect, but the whole tunnel environment is easy to be polluted; the air quantity required by the extraction type ventilation is small, the environment is not polluted, but the ventilation time is long; the mixed ventilation has the advantages of the two, but due to the increase of equipment and pipelines, the construction operation is influenced due to the limitation of the clearance size of the tunnel; roadway type ventilation and air duct type ventilation are suitable for long and large tunnels driven by a single head, auxiliary channels such as a flat guide, an inclined shaft and a vertical shaft are used for forming local ventilation circulation, the ventilation distance of the tunnels is shortened, and the ventilation efficiency is improved.
The tunnel construction project is positioned in a plateau area, the altitude is above 3000 m, the tunnel mileage is long, the construction condition is bad, the construction difficulty is high, and the construction method of constructing a cross tunnel and then constructing a positive tunnel communicated with the cross tunnel is adopted in combination with the construction of the tunnel in the geographical environment. Referring to fig. 1, the tunnel includes a cross hole and a hole communicated with the cross hole, the hole includes a hole left line and a hole right line in parallel, wherein the cross hole is communicated with the hole left line.
The ventilation system in this embodiment is used for ventilation of the entire construction process of the cross hole and the positive hole. The construction stages are divided into a horizontal hole construction stage, a positive hole small mileage construction stage and a positive hole large mileage construction stage according to the ventilation requirements of different construction stages; the cross hole construction stage is a stage from the cross hole construction to the left line position of the main hole; the construction stage of the small mileage of the main tunnel refers to the stage of constructing the small mileage section of the main tunnel until the small mileage section of the main tunnel is communicated; the construction stage of the big mileage of the main tunnel refers to the stage of constructing the big mileage of the main tunnel until the big mileage of the main tunnel is communicated after the construction of the small mileage of the main tunnel is completed.
The ventilation system comprises a cross-hole construction ventilation system, a hole-in-hole small mileage construction ventilation system and a hole-in-hole large mileage construction ventilation system aiming at different construction stages and ventilation requirements and characteristics of different construction stages in the whole construction process.
In the stage of the cross-tunnel construction, the cross-tunnel construction ventilation system mainly ventilates the inside of a tunnel in the cross-tunnel construction process. Referring to fig. 1, the cross-hole construction ventilation system includes:
a first fan assembly 31 disposed at the opening of the lateral hole 10 when the lateral hole is constructed;
a transverse hole branch hole 11 communicated with the transverse hole is arranged at a position close to the left line of the positive hole;
the first fan assembly 31 is connected with a first air pipe assembly, and supplies air to the tunnel face of the transverse tunnel and the transverse tunnel branch hole through the first air pipe assembly.
The first fan assembly 31 adopts an axial flow fan (TV (H) -2 x 14#90kW, which is H1-3), the first air pipe assembly comprises a first air pipe 41 extending along the tunnel face along the axis direction of the tunnel and a first air pipe branch pipe 42 connected with the first air pipe, the first air pipe branch pipe 42 extends along the axis direction of the tunnel branch hole towards the tunnel face of the tunnel, and the first air pipe branch pipe adopt low-leakage air pipes with diameters of 1.6 m; the first air pipe is connected with an axial flow fan and supplies air to the tunnel face of the transverse tunnel and the transverse tunnel branch hole in a pressed-in ventilation mode.
In the construction stage of the cross hole, the cross hole branch hole is constructed till the cross hole branch hole is penetrated, and in the construction stage of the small mileage of the main hole, the ventilation system for the construction of the small mileage of the main hole mainly ventilates the inside of the small mileage section of the main hole. Referring to fig. 2, the positive hole small mileage construction ventilation system includes:
a second fan assembly 32 disposed at the opening of the lateral hole;
a first auxiliary hole 25 which is communicated with the left line of the positive hole and the right line of the positive hole is arranged at the corresponding position of the transverse hole 10;
the second fan assembly 32 is connected with a second air pipe assembly, and the second air pipe assembly 32 extends into the right line and the left line of the main tunnel through the first auxiliary hole 25 and supplies air to the face of the right line and the left line of the main tunnel through the second air pipe assembly.
Here, the second fan assembly 32 adopts three axial fans, at this time, the axial fans (H1-3) originally arranged at the opening of the cross hole can be moved to the position of the branch hole of the cross hole, and at this time, only two axial fans (H1-1 and H1-2 respectively, and model number is TV (H) -2 x 14#110kw) need to be newly added.
The second air duct assembly 32 here includes a second small mileage main air duct 43, a second large mileage left line air duct 45, and a second large mileage right line air duct 46; the second small mileage main air pipe 43 extends into the right line of the main hole along the first auxiliary hole 25, two second small mileage branch air pipes 44 facing to one side of the small mileage direction of the main hole are arranged on the second small mileage main air pipe 43, the two second small mileage branch air pipes 44 are respectively arranged along the axial directions of the left line of the main hole and the right line of the main hole and extend to the positions corresponding to the face, the second small mileage main air pipe is connected with an axial flow fan (H1-3), and air is supplied to the faces of the small mileage sections 21 and 22 of the left line and the right line of the main hole respectively in a forced ventilation mode. The second small mileage main air pipe and the second small mileage branch air pipe respectively adopt low leakage air pipes with the diameter of 1.6 m.
The second large mileage left line air pipe 45 extends towards the construction direction of the large mileage of the main tunnel and is arranged at the position of the large mileage face of the left line of the main tunnel; the second large mileage left line air pipe is connected with an axial flow fan (H1-1) and adopts a forced ventilation mode to supply air to the positive hole left line large mileage face. The second most mileage left line air pipe adopts a low leakage air pipe with the diameter of 1.8 m.
The second large mileage right line air pipe 46 extends to the position of the large mileage face of the right line of the main tunnel through the first auxiliary tunnel towards the construction direction of the vibration large mileage; the second large mileage right line air pipe is connected with an axial flow fan (H1-2) and adopts a forced ventilation mode to supply air to the right line large mileage face of the main tunnel. The second-range right-line air pipe adopts a low-leakage air pipe with the diameter of 1.8 m.
After the direction of the small mileage of the main tunnel is communicated, the ventilation system of the large mileage of the main tunnel is mainly used for ventilation in the large mileage section of the main tunnel in the construction stage of the large mileage of the main tunnel. Referring to fig. 3, the positive hole mileage ventilation system includes:
a second auxiliary hole 26 is arranged at intervals from the first auxiliary hole towards the construction direction of the main hole large mileage, and the second auxiliary hole 26 is communicated with the main hole left line large mileage section 23 and the main hole right line large mileage section 24;
the third fan assembly 33, the third fan assembly 33 is set up in the right line of the positive hole near the position of the second auxiliary hole;
the third fan assembly 33 is connected with a third air pipe assembly, and supplies air to the face of the large mileage section of the right line of the main tunnel and the left line of the main tunnel respectively through the third air pipe assembly.
Here, the third fan assembly 33 adopts two axial fans, and at this time, the two axial fans (H1-1, H1-2) originally disposed at the opening of the branch hole of the horizontal hole can be moved into the right line of the main hole.
The third air duct assembly here includes a third range left air duct 47 and a third range right air duct 48; the third large mileage left line air pipe 47 extends to the position of the large mileage face of the main hole left line towards the main hole large mileage construction direction through the second auxiliary hole, and is connected with an axial flow fan (H1-1) to supply air to the face of the main hole left line large mileage construction direction; the third-mileage right-line air pipe 48 extends towards the construction direction of the main hole and is arranged at the position of the main hole right-line main mileage face, and the third-mileage right-line air pipe is connected with an axial flow fan (H1-2) for supplying air to the main hole right-line main mileage face. The third-mileage left-line air pipe and the third-mileage right-line air pipe adopt low-leakage air pipes with diameters of 1.8 m.
Referring to fig. 3, a choke structure 50 is disposed at a position of the second auxiliary hole in the right line of the main hole, where the choke structure 50 is used to block the return air on the face of the right line of the main hole, so that the return air on the side flows back along one side of the left line of the main hole after passing through the second auxiliary hole.
Based on the tunnel construction ventilation structure in the embodiment, fresh air is conveyed to the inside of the tunnel in the construction process of the tunnel, and the inside polluted gas is discharged, so that the working requirements of constructors and engineering machinery are met. In combination with the tunnel construction method adopted specifically, the ventilation method adopted specifically comprises the following steps:
s1, in the construction stage of a cross hole, using a first fan assembly arranged at the opening of the cross hole, and adopting a forced ventilation mode to blow air to the construction face of a cross hole and a cross hole branch hole until the construction of the cross hole and the penetration of the cross hole branch hole are completed; the construction stage is that when the construction is carried out to the construction position of the transverse tunnel branch hole, the construction mode of alternately constructing the transverse tunnel face and the transverse tunnel branch hole is adopted when the transverse tunnel and the transverse tunnel branch hole are required to be constructed, and air is supplied to the corresponding construction tunnel face alternately by controlling the air valve on the first air pipe component.
S2, constructing a main hole after the construction of the transverse hole is completed, wherein in the step, the construction is carried out on a small mileage section of the main hole until the small mileage section of the main hole is communicated, and a first auxiliary hole communicated with a left main hole line and a right main hole line is constructed between the left main hole line and the right main hole line; the method comprises the steps that a fan is adopted to supply air for one side of a small mileage of a left line and a right line of a main tunnel, when a small mileage section of the left line and the right line of the main tunnel is constructed, a mode of alternately constructing the face of the left line and the right line of the main tunnel is adopted, and air is alternately supplied for the face of the corresponding construction by controlling an air valve arranged on a second air pipe component;
in the step, when the large mileage sections of the left line and the right line of the main tunnel are constructed, other fans can be used for respectively supplying air to the corresponding tunnel face on the large mileage sides of the left line and the right line of the main tunnel.
S3, after the small mileage section of the main hole is communicated, continuing to construct the large mileage section of the main hole in the step, and constructing a second auxiliary hole which is communicated with the left line of the main hole and the right line of the main hole between the left line of the main hole and the right line of the main hole after the large mileage section of the main hole is constructed to a certain position away from the transverse hole;
in the step, a third fan assembly arranged at a position close to the second auxiliary hole in the right line of the main hole is used for respectively supplying air to the tunnel faces of the left line of the main hole and the right line of the main hole in a roadway ventilation mode; in the step, two fans are adopted to supply air to the face corresponding to one side of the main hole left line and the main hole right line with the large mileage.
In the construction of this stage, after a certain distance is required according to the construction length of the main tunnel large mileage section, a third auxiliary tunnel, a fourth auxiliary tunnel and the like are constructed, and the third fan unit is correspondingly moved to the positions of the third auxiliary tunnel and the fourth auxiliary tunnel to supply air to the corresponding tunnel face, and the corresponding choke structural member is arranged at the corresponding position to form a preset air return channel, which are all conventional improvements which can be made based on the above embodiments.
In the ventilation operation, when the air is supplied to the tunnel face, the air return speed of the tunnel face is not less than 0.3m/s so as to meet the requirements of tunnel construction and ventilation efficiency.
In the description of the present utility model, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are used to indicate orientations or positional relationships based on those shown in the drawings, or those that are conventionally put in use in the product of the present utility model, they are merely used to facilitate description of the present utility model and simplify description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Furthermore, the terms "horizontal," "vertical," and the like in the description of the present utility model, if any, do not denote absolute levels or overhangs, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present utility model, it should also be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model in any way, and any simple modification, equivalent variation, etc. of the above embodiment according to the technical matter of the present utility model fall within the scope of the present utility model.
Claims (10)
1. The tunnel construction ventilation system in the plateau area is characterized in that the tunnel comprises a transverse hole and a positive hole communicated with the transverse hole, wherein the positive hole comprises a positive hole left line and a positive hole right line which are parallel, and the transverse hole is communicated with the positive hole left line; the ventilation system comprises a cross-hole construction ventilation system, a hole-in-hole small mileage construction ventilation system and a hole-in-hole large mileage construction ventilation system;
the cross-hole construction ventilation system comprises:
the first fan assembly is arranged at the opening of the transverse hole during construction of the transverse hole;
a transverse hole branch hole communicated with the transverse hole is arranged at a position close to the left line of the positive hole;
the first fan assembly is connected with a first air pipe assembly and supplies air to the tunnel face of the transverse tunnel and the transverse tunnel branch hole through the first air pipe assembly;
the ventilation system for the hole-forming small mileage construction comprises:
the second fan assembly is arranged at the opening of the transverse hole branch hole;
a first auxiliary hole which is communicated with the left line of the positive hole and the right line of the positive hole is arranged at the corresponding position of the transverse hole;
the second fan assembly is connected with a second air pipe assembly, the second air pipe assembly extends into the left main hole line and the right main hole line through the first auxiliary hole, and supplies air to the tunnel face of the left main hole line and the right main hole line through the second air pipe assembly;
the positive tunnel big mileage construction ventilation system includes:
the second auxiliary hole is arranged at intervals with the first auxiliary hole in the big mileage construction direction of the main hole, and the second auxiliary hole is communicated with the left main hole line and the right main hole line;
the third fan assembly is arranged at a position close to the second auxiliary hole in the right line of the positive hole;
the third fan assembly is connected with a third air pipe assembly and supplies air to the tunnel face of the right line and the left line of the main tunnel respectively through the third air pipe assembly.
2. The system of claim 1, wherein the first fan assembly comprises at least one axial fan configured to blow air into the face of the lateral tunnel or the lateral tunnel branch in a forced ventilation manner.
3. The highland tunnel construction ventilation system of claim 2, wherein the first air duct assembly comprises a first air duct extending along a lateral tunnel axis toward a lateral tunnel face and a first air duct branch connected to the first air duct, the first air duct branch extending along a lateral tunnel branch axis toward a lateral tunnel face.
4. The ventilation system for tunnel construction in the plateau region according to claim 1, wherein the second fan assembly comprises at least three axial fans for supplying air to the face of the left line of the main tunnel and the right line of the main tunnel in a plenum manner.
5. The highland tunnel construction ventilation system of claim 1, wherein the second air duct assembly comprises a second small mileage main air duct, a second large mileage left line air duct, and a second large mileage right line air duct;
the second small mileage main air pipe extends into the right line of the main hole along the first auxiliary hole, two second small mileage branch air pipes facing to one side of the small mileage direction of the main hole are arranged on the second small mileage main air pipe, and the two second small mileage branch air pipes are respectively arranged along the axial directions of the left line of the main hole and the right line of the main hole and extend to the positions corresponding to the face;
the second large mileage left line air pipe extends towards the construction direction of the large mileage of the main tunnel and is arranged at the position of the large mileage face of the left line of the main tunnel;
and the second large mileage right line air pipe extends to the position of the large mileage face of the main tunnel towards the large mileage construction direction of the main tunnel through the first auxiliary tunnel.
6. The highland tunnel construction ventilation system of claim 5, wherein the second small mileage main air duct, the second large mileage left air duct, and the second large mileage right air duct are each connected to one of the fans in the second fan assembly.
7. The ventilation system for tunnel construction in the plateau region according to claim 1, wherein the third fan assembly comprises at least two axial fans, and adopts a roadway ventilation mode to supply air to the face of the left line of the main tunnel and the right line of the main tunnel.
8. The highland tunnel construction ventilation system of claim 1, wherein the third air duct assembly comprises a third range left air duct and a third range right air duct;
the third-mileage left-line air pipe extends to the position of the main tunnel left-line large-mileage face towards the main tunnel large-mileage construction direction through the second auxiliary tunnel;
and the third-range right line air pipe extends towards the construction direction of the main tunnel large range and is arranged at the position of the main tunnel right line large range face.
9. The highland tunnel construction ventilation system of claim 8, wherein the third-range left-hand air duct and the third-range right-hand air duct are each connected to one of the third fan assemblies.
10. The ventilation system for tunnel construction in the plateau area according to claim 1, wherein a choke structural member is disposed at the position of the second auxiliary hole in the right line of the main hole, and the choke structural member is used for blocking return air of the face of the right line of the main hole so that the return air flows back along one side of the left line of the main hole through the second auxiliary hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223028638.5U CN218971240U (en) | 2022-11-15 | 2022-11-15 | Tunnel construction ventilation system for plateau area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223028638.5U CN218971240U (en) | 2022-11-15 | 2022-11-15 | Tunnel construction ventilation system for plateau area |
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| Publication Number | Publication Date |
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| CN218971240U true CN218971240U (en) | 2023-05-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223028638.5U Active CN218971240U (en) | 2022-11-15 | 2022-11-15 | Tunnel construction ventilation system for plateau area |
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2022
- 2022-11-15 CN CN202223028638.5U patent/CN218971240U/en active Active
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