CN214787496U - Construction ventilation structure of supplementary parallel three hole method tunnels of shaft - Google Patents
Construction ventilation structure of supplementary parallel three hole method tunnels of shaft Download PDFInfo
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- CN214787496U CN214787496U CN202120376207.4U CN202120376207U CN214787496U CN 214787496 U CN214787496 U CN 214787496U CN 202120376207 U CN202120376207 U CN 202120376207U CN 214787496 U CN214787496 U CN 214787496U
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Abstract
The utility model discloses a construction ventilation structure of a vertical shaft auxiliary parallel three-hole method tunnel, which comprises three parallel tunnels and a vertical shaft communicated with the three parallel tunnels; the vertical shaft is communicated with the three tunnels through a roadway; four air pipes are arranged in the shaft, one ends of the four air pipes are connected with 4 axial flow fans at the port of the shaft through pipelines, and the other ends of the four air pipes are led into the three parallel tunnels from the lower end of the shaft through a tunnel. The vertical shaft of the utility model is used as a ventilation tunnel, which accelerates the discharge speed of the dirty air and has good ventilation effect; two axial flow fans of the vertical shaft mouth are directly connected with the left and right main hole working faces through two air pipes for air supply; the other two axial flow fans supply air to all the working surfaces in the middle pilot tunnel through two air pipes; two air pipes in the middle pilot tunnel are provided with air doors at the transverse passage and extend to the main tunnel auxiliary operation surface through air distribution pipes for air supply; the equipment is fully utilized, the cost is saved, and the health and safety of constructors in the hole are ensured.
Description
Technical Field
The utility model belongs to the technical field of the tunnel engineering construction, concretely relates to supplementary parallel three hole method tunnels of shaft construction ventilation structure.
Background
At present, in order to solve the problems of construction period and operation safety of single-end construction, parallel pilot tunnels are often arranged for assisting main tunnel construction, particularly for bidirectional separated highway or railway tunnels, a middle pilot tunnel is arranged between a left main tunnel and a right main tunnel, main tunnel construction can be assisted in a construction period, and an emergency rescue channel can be used in an operation period. For example, a 22 kilometer high-speed Tianshan victory tunnel in Wulien in Xinjiang and a 15 kilometer high-speed Dalianshan tunnel in Lexi province are designed by a three-hole method, wherein a parallel middle pilot tunnel is constructed by adopting TBM (tunnel boring machine) to lead a main tunnel, and then a main tunnel operation surface is increased through a transverse hole, so that the construction of the main tunnel is accelerated. TBM (Tunnel Boring machine) is a tunnel Boring machine, and the TBM method adopts the equipment to carry out parallel continuous operation of construction procedures such as tunneling, supporting, deslagging and the like of a full-face tunnel Boring machine.
The tunnel construction is in a relatively closed space environment, the construction ventilation is an indispensable technical link, particularly for an extra-long tunnel, along with the increase of the single-head tunneling distance, a working face is gradually far away from a tunnel opening and even can reach several kilometers, and harmful gases such as smoke dust, automobile exhaust and the like generated in the construction can not be naturally discharged, so that the requirements of personnel and equipment can only be met through forced ventilation. Especially for a three-tunnel method tunnel, the parallel middle pilot tunnel has more auxiliary operation surfaces, long ventilation distance of a single head, more operation surfaces such as drilling explosion, slag discharge, anchor spraying and the like in the tunnel in a peak period, more pollution sources such as smoke dust, harmful gas and the like in the tunnel, large ventilation pressure of the tunnel and complex ventilation organization. Poor ventilation of the tunnel not only harms the health of constructors and reduces the working efficiency, but also influences the operation of construction equipment, so that the ventilation is a problem which needs to be solved during construction. For an extra-long tunnel, in order to reduce the operation ventilation pressure, a complete set of ventilation method is further needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a construction ventilation structure in parallel three hole method tunnels is assisted to shaft is provided to solve in parallel three hole method tunnel ventilation design, the time of discharging fume is long, the difficult and tunnel blowdown scheduling problem thoroughly of ventilating.
In order to achieve the above object, the utility model adopts the following technical scheme:
a construction ventilation structure of a vertical shaft auxiliary parallel three-hole method tunnel comprises three parallel tunnels and a vertical shaft communicated with the three parallel tunnels; the vertical shaft is communicated with the three tunnels through a roadway; four air pipes are arranged in the shaft, one ends of the four air pipes are connected with 4 axial flow fans at the port of the shaft through pipelines, and the other ends of the four air pipes are led into the three parallel tunnels from the lower end of the shaft through a tunnel.
The three parallel tunnels are respectively a parallel middle pilot tunnel, a left line pilot tunnel and a right line pilot tunnel, the left line pilot tunnel and the right line pilot tunnel are respectively positioned at two sides of the parallel middle pilot tunnel, and a transverse channel for communication is arranged between the adjacent tunnels.
2 axial flow fans at the end of the vertical shaft supply air to all working surfaces in the parallel middle pilot tunnel through two air pipes; and the other two axial flow fans are respectively connected to the working surface air supply of the left line main hole and the right line main hole through an air pipe.
The left line main tunnel and the right line main tunnel are in sectional type tunnel construction, construction section ports of the left line main tunnel and the right line main tunnel are communicated through transverse channels on two sides of a parallel middle pilot tunnel, and branch air pipes led out by air pipes of axial flow fans of the parallel middle pilot tunnels are arranged in the left line main tunnel and the right line main tunnel from the parallel middle pilot tunnel through the transverse channels on the two sides.
And an air door is arranged at the inlet of the branch air pipe.
And jet fans are arranged in the transverse channel and the parallel middle pilot tunnels.
Two air pipes I in the parallel middle pilot holes are respectively arranged on the left and the right, the left air pipe is guided to the branch air pipe of the left straight pilot hole through the air door, and the right air pipe is guided to the branch air pipe of the right straight pilot hole through the air door; wherein the terminal of tuber pipe and two branch road tuber pipes all are provided with amount of wind and wind speed detector all around.
Compared with the prior art, the utility model discloses the beneficial effect who produces is:
the utility model provides a construction ventilation structure in supplementary parallel three hole method tunnels of shaft can solve the operation face that the supplementary main tunnel of parallel middle tunnel TBM faced construction many, ventilation network complicacy, the difficult technical problem of constructing ventilation such as the difficulty of airing exhaust. The vertical shaft is used for assisting the construction and ventilation of the three-hole method, so that the exhaust of the dirty air can be accelerated, and the ventilation effect is good; determining the air volume and the air pressure of the axial flow fan according to the actual air volume, and adjusting an air door to realize the control of the air volume in front of the tunnel face; after the construction section of supplementary main tunnel link up, can use the air door antedisplacement to the supplementary main tunnel section of next cross passage, make full use of equipment practices thrift the cost, has guaranteed constructor's health safety in the hole simultaneously.
Drawings
Fig. 1 is a schematic view of the overall structure of the embodiment of the present invention;
fig. 2 is a cross-sectional view of the arrangement of the middle pilot tunnel ductwork of fig. 1.
In the figure, 1-parallel middle pilot holes; 2-right hole of left line; 3-right line positive hole; 4-a transverse channel; 5-an axial flow fan; 6-air pipe; 7-a damper; 8-jet flow fan; 9-air quantity and air speed detector; 10-ventilation roadway; 11. and (4) a shaft.
Detailed Description
The present invention will be described in detail with reference to the following detailed description and accompanying drawings.
The utility model discloses utilize extra long tunnel in order to reduce operation ventilation pressure, satisfy disaster prevention rescue ventilation needs, set up the ventilation shaft in the middle of the tunnel, can satisfy operation ventilation energy saving and consumption reduction and disaster prevention rescue requirement on the one hand, on the other hand can utilize the shaft as discharging fume and ventilating the tunnel in the construction period, shortens tunnel forced ventilation distance, improves operation environment in the construction period hole.
In combination with the ventilation problem of construction of a three-hole method of a Wuli high-speed Tianshan victory tunnel, as the parallel middle pilot tunnel bears TBM and increases the construction of a main tunnel working face, the parallel middle pilot tunnel is also a main discharge channel of dirty wind, is responsible for the material organization pressure of the middle pilot tunnel, and does not have the condition of tunnel type ventilation, the tunnel type ventilation between the three holes is difficult to be implemented, and only the press-in type ventilation can be adopted. When the shaft construction is completed, the shaft is communicated with the three parallel tunnels through the ventilation tunnel, at the moment, the shaft can be used as the ventilation tunnel, four axial flow fans are arranged at the wellhead, air is supplied into the tunnel through the air pipes, dirty air is naturally discharged through the chimney effect of the shaft, the smoke discharging problem can be effectively solved, the length of single-head press-in ventilation from the wellhead to the three-hole tunnel is shortened, and energy is saved and consumption is reduced.
Example 1
Referring to fig. 1, a construction ventilation structure of a vertical shaft assisted parallel three-hole method tunnel comprises three parallel tunnels and a vertical shaft communicated with the three parallel tunnels; the vertical shaft is communicated with the three tunnels through a roadway; four air pipes are arranged in the shaft, one ends of the four air pipes are connected with 4 axial flow fans at the port of the shaft through pipelines, and the other ends of the four air pipes are led into the three parallel tunnels from the lower end of the shaft through a tunnel.
The three parallel tunnels are respectively a parallel middle pilot tunnel 1, a left line pilot tunnel 2 and a right line pilot tunnel 3, the left line pilot tunnel 2 and the right line pilot tunnel 3 are respectively positioned at two sides of the parallel middle pilot tunnel 1, and a transverse channel 4 for communication is arranged between the adjacent tunnels; the parallel middle pilot tunnel 1 adopts a TBM method to carry out forward main tunnel construction, and the excavation working faces of the left-line main tunnel 2 and the right-line main tunnel 3 are increased through the transverse passage 4 to assist the construction of the left-line main tunnel 2 and the right-line main tunnel 3.
The design of the section of the parallel middle pilot tunnel 1 needs to meet the size requirements of bidirectional traveling and arrangement of two air pipes 6, the front tunnel excavation working surface is increased through the transverse passage 4, and the transverse passage 4 at least needs to meet the size requirements of unidirectional traveling and arrangement of the air pipes 6.
Example 2
On the basis of the embodiment 1, further, 2 axial flow fans 5 at the ports of the vertical shaft 11 are connected to each working surface in the parallel middle pilot tunnel 1 through two air pipes 6 and an air tunnel 10; the other two axial-flow fans 5 are respectively connected to the working face air supply of the left line main hole 2 and the right line main hole 3 through an air pipe 6 and a ventilation roadway 10.
The left line pilot tunnel 2 and the right line pilot tunnel 3 are in sectional type tunnel construction, the left line pilot tunnel 2 and the right line pilot tunnel 3 are communicated through transverse channels 4 on two sides of a parallel middle pilot tunnel 1, and branch air pipes led out by air pipes 6 of axial flow fans 5 of the parallel middle pilot tunnel 1 are arranged in the left line pilot tunnel 2 and the right line pilot tunnel 3 from the parallel middle pilot tunnel 1 through the transverse channels 4 on the two sides.
And an air door 7 is installed at an inlet of the branch air pipe and used for adjusting the air pressure and the air quantity of the auxiliary working face of the left line positive hole 2 and the right line positive hole 3, so that the requirement of the air requirement on the tunnel face is met. In order to prevent blow-by of the dirty air, a jet fan 8 is arranged in the transverse channel 4 and the parallel middle guide hole 1.
In the above embodiment, the types of the axial flow fan 5 and the air pipe 6 are selected, and the wind pressure and the wind volume required by each working surface are calculated according to the construction organization design at different stages and the tunnel construction technical specification, so as to determine the model specification parameters of the axial flow fan 5 and the air pipe 6.
Example 3
Referring to fig. 1 and 2, on the basis of embodiment 1 or 2, further, two air ducts 6 in the parallel middle pilot tunnel 1 undertake air supply to each working face in the middle pilot tunnel, the two air ducts are separately arranged along the first left and the right of the section of the middle pilot tunnel, the left air duct is directly connected to a secondary air fan matched with the rear part of the TBM and is led to a branch air duct of the left straight main tunnel 2 through an air door 7; the right air pipe is led to a branch air pipe of the right line main hole 3 through an air door 7 and bears construction ventilation of each working surface of the right line main hole; wherein, the air pipe 6 end of the straight-through TBM secondary fan and the two branch air pipe ends are provided with an air volume and air speed detector 9 for monitoring the air supply volume of the air pipe in real time, and dynamically adjusting the air pressure and the air volume of the axial flow fan 5 and the air volume of the air door 7 according to the air environment and the operation working condition in the tunnel to meet the air demand requirement of the tunnel face.
Furthermore, air pipes 6 of the parallel middle pilot tunnel 1, the left line pilot tunnel 2 and the right line pilot tunnel 3 are all arranged on the upper arch shoulder part of the tunnel.
Further, the parallel middle pilot tunnel 1 extends to the transverse channel 4 of the left line pilot tunnel 2 and the right line pilot tunnel 3 to be constructed at an inclined forward angle.
The number of the air doors 7 is determined according to the working face of the auxiliary left and right main holes, and the air doors 7 are moved forwards in time according to the construction progress.
The air quantity and air speed detector 9 arranged at the tail end of the branch air pipe of the auxiliary main tunnel construction section feeds back data according to the air quantity at the tail end of the actual air pipe, and the air quantity, the air pressure and the air door 7 of the axial flow fan 5 at the opening of the parallel pilot tunnel 1 are reasonably adjusted to realize the adjustment of the air supply quantity of the tunnel face.
In order to accelerate the discharge of the dirty air, the jet fans 8 are arranged in the parallel middle pilot tunnel 1 and the transverse channel 4 for flow guiding, the jet fans 8 are additionally arranged at certain intervals after the tunnel construction is carried out for a long distance, the rapid discharge of the dirty air is accelerated, and finally the dirty air is directly discharged out of the tunnel through the parallel middle pilot tunnel 1.
The vertical shaft of the utility model is used as a ventilation tunnel, which accelerates the discharge speed of the dirty air and has good ventilation effect; two axial flow fans of the vertical shaft mouth are directly connected with the left and right main hole working faces through two air pipes for air supply; the other two axial flow fans supply air to all the working surfaces in the middle pilot tunnel through two air pipes; two air pipes in the middle pilot tunnel are provided with air doors at the transverse passage and extend to the main tunnel auxiliary operation surface through air distribution pipes for air supply; determining the air volume and the air pressure of the axial flow fan according to the actual air volume, and adjusting an air door to realize the control of the air volume in front of the tunnel face; after the construction section of supplementary main tunnel link up, can use the air door antedisplacement to the supplementary main tunnel section of next cross passage, make full use of equipment practices thrift the cost, has guaranteed constructor's health safety in the hole simultaneously.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims. The components and structures of the present invention not described in detail belong to the known components and structures in the industry, and are not described in detail herein.
Claims (7)
1. The utility model provides a supplementary parallel three hole method tunnels of shaft construction ventilation structure which characterized by: comprises three parallel tunnels and a vertical shaft (11) communicated with the three parallel tunnels; the vertical shaft (11) is communicated with the three tunnels through a roadway (10); four air pipes (6) are arranged in the vertical shaft (11), one ends of the four air pipes (6) are connected with 4 axial flow fans (5) at the ports of the vertical shaft (11) through pipelines, and the other ends of the four air pipes (6) are led into the three parallel tunnels from the lower end of the vertical shaft (11) through a roadway (10).
2. The construction ventilation structure of the vertical shaft auxiliary parallel three-hole method tunnel according to claim 1, characterized in that: the three parallel tunnels are respectively a parallel middle pilot tunnel (1), a left line pilot tunnel (2) and a right line pilot tunnel (3), the left line pilot tunnel (2) and the right line pilot tunnel (3) are respectively positioned at two sides of the parallel middle pilot tunnel (1), and a transverse channel (4) for communication is arranged between the adjacent tunnels.
3. The construction ventilation structure of the vertical shaft auxiliary parallel three-hole method tunnel as claimed in claim 2, wherein: 2 axial flow fans (5) at the port of the vertical shaft (11) supply air to all working surfaces in the parallel middle pilot tunnel (1) through two air pipes (6); and the other two axial flow fans (5) are respectively connected to the working surfaces of the left line positive hole (2) and the right line positive hole (3) through an air pipe (6) for air supply.
4. The construction ventilation structure of the vertical shaft auxiliary parallel three-hole method tunnel as claimed in claim 2, wherein: the left line main tunnel (2) and the right line main tunnel (3) are constructed by sectional type tunnels, construction section ports of the left line main tunnel (2) and the right line main tunnel (3) are communicated through transverse channels (4) on two sides of the parallel middle pilot tunnel (1), and branch air pipes led out by air pipes (6) of axial flow fans (5) of the parallel middle pilot tunnel (1) are arranged in the left line main tunnel (2) and the right line main tunnel (3) from the parallel middle pilot tunnel (1) through the transverse channels (4) on two sides.
5. The construction ventilation structure of the vertical shaft auxiliary parallel three-hole method tunnel according to claim 4, characterized in that: and an air door (7) is arranged at the inlet of the branch air pipe.
6. The construction ventilation structure of the vertical shaft auxiliary parallel three-hole method tunnel as claimed in claim 2, wherein: and jet fans (8) are arranged in the transverse channel (4) and the parallel middle pilot tunnels (1).
7. The construction ventilation structure of the vertical shaft auxiliary parallel three-hole method tunnel according to claim 6, characterized in that: two air pipes (6) in the parallel middle pilot hole (1) are respectively arranged at the left and the right, the left air pipe is led to a branch air pipe of the left straight hole (2) through an air door (7), and the right air pipe is led to a branch air pipe of the right straight hole (3) through the air door (7); wherein, the tail end of one air pipe (6) and the tail ends of the two air pipes are provided with an air quantity and air speed detector (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120376207.4U CN214787496U (en) | 2021-02-19 | 2021-02-19 | Construction ventilation structure of supplementary parallel three hole method tunnels of shaft |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120376207.4U CN214787496U (en) | 2021-02-19 | 2021-02-19 | Construction ventilation structure of supplementary parallel three hole method tunnels of shaft |
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| CN214787496U true CN214787496U (en) | 2021-11-19 |
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| CN202120376207.4U Active CN214787496U (en) | 2021-02-19 | 2021-02-19 | Construction ventilation structure of supplementary parallel three hole method tunnels of shaft |
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2021
- 2021-02-19 CN CN202120376207.4U patent/CN214787496U/en active Active
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