CN112780329A - Construction ventilation method for vertical shaft assisted parallel three-hole method tunnel - Google Patents
Construction ventilation method for vertical shaft assisted parallel three-hole method tunnel Download PDFInfo
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- CN112780329A CN112780329A CN202110188510.6A CN202110188510A CN112780329A CN 112780329 A CN112780329 A CN 112780329A CN 202110188510 A CN202110188510 A CN 202110188510A CN 112780329 A CN112780329 A CN 112780329A
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- 238000010276 construction Methods 0.000 title claims abstract description 54
- 238000009423 ventilation Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000009412 basement excavation Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 239000000779 smoke Substances 0.000 description 5
- 230000008520 organization Effects 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/04—Air ducts
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/08—Ventilation arrangements in connection with air ducts, e.g. arrangements for mounting ventilators
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/10—Air doors
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Ventilation (AREA)
Abstract
The invention discloses a construction ventilation method of a vertical shaft assisted 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 is used as a ventilation tunnel, so that the discharge speed of the dirty air is increased, and the ventilation effect is good; 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 invention belongs to the technical field of tunnel engineering construction, and particularly relates to a construction ventilation method of a vertical shaft assisted parallel three-hole tunnel.
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.
Disclosure of Invention
The invention aims to solve the technical problem of providing a construction ventilation method of a vertical shaft assisted parallel three-hole method tunnel so as to solve the problems of ventilation design, long smoke exhaust time, difficult ventilation, incomplete pollution discharge in the tunnel and the like of the parallel three-hole method tunnel.
In order to achieve the purpose, the invention adopts the technical scheme that:
a construction ventilation method 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, 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; and the parallel middle pilot tunnel adopts a TBM method to carry out forward main tunnel construction, and the excavation working faces of the left main tunnel and the right main tunnel are increased through the transverse channel to assist the construction of the left main tunnel and the right main tunnel.
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.
The air door is installed at the inlet of the branch air pipe and used for adjusting the air pressure and the air quantity of the left line main hole and the right line main hole auxiliary operation face and meeting the requirement of air demand of the tunnel face.
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 tail ends of one air pipe and the two air pipes are provided with air quantity and air speed detectors; the air supply quantity of the air pipe is monitored in real time, and the air pressure, the air quantity and the air door air quantity of the axial flow fan are dynamically adjusted according to the air environment and the operation working condition in the tunnel, so that the air demand requirement of the tunnel face is met.
And air pipes of the parallel middle pilot tunnel, the left line pilot tunnel and the right line pilot tunnel are all arranged on the upper arch shoulder part of the tunnel.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a construction ventilation method for a vertical shaft auxiliary parallel three-hole method tunnel, which can solve the technical problems of construction ventilation such as multiple operation surfaces, complex ventilation network, difficult air exhaust and the like in parallel pilot tunnel TBM auxiliary main hole construction. 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 diagram of the overall structure of an 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 below with reference to the following detailed description and accompanying drawings.
In order to reduce the operation ventilation pressure and meet the requirements of disaster prevention and rescue, the ventilation vertical shaft is arranged in the middle of the tunnel, so that the requirements of operation ventilation, energy conservation, consumption reduction and disaster prevention and rescue can be met, and the vertical shaft can be used as a smoke exhaust and ventilation roadway in the construction period, so that the forced ventilation distance of the tunnel is shortened, and the working environment in the tunnel in the construction period is improved.
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 method for constructing and ventilating a vertical shaft-assisted parallel three-hole tunnel includes three parallel tunnels in parallel 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 is used as a ventilation tunnel, so that the discharge speed of the dirty air is increased, and the ventilation effect is good; 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 are 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. Components and structures of the present invention that are not specifically described are not necessarily described in detail as they are commonly known and used in the art.
Claims (8)
1. A construction ventilation method of a vertical shaft assisted parallel three-hole method tunnel is characterized by comprising the following steps: 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 method of the vertical shaft auxiliary parallel three-hole method tunnel as claimed in claim 1, which is 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; the parallel middle pilot tunnel (1) adopts a TBM method to carry out forward main tunnel construction, 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), and construction of the left-line main tunnel (2) and the right-line main tunnel (3) is assisted.
3. The construction ventilation method of the vertical shaft auxiliary parallel three-hole method tunnel as claimed in claim 2, which is characterized in that: 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 method of the vertical shaft auxiliary parallel three-hole method tunnel as claimed in claim 2, which is characterized in that: 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 method of the vertical shaft auxiliary parallel three-hole method tunnel as claimed in claim 2, which is characterized in that: the entrance of branch road tuber pipe install air door (7) for the wind pressure, the amount of wind of auxiliary operation face are managed to the governing flow left side line positive hole (2) and right side line positive hole (3), satisfy the face and need the wind requirement.
6. The construction ventilation method of the vertical shaft auxiliary parallel three-hole method tunnel as claimed in claim 2, which is characterized in that: and jet fans (8) are arranged in the transverse channel (4) and the parallel middle pilot tunnels (1).
7. The construction ventilation method of the vertical shaft auxiliary parallel three-hole method tunnel as claimed in claim 6, wherein the method comprises the following steps: 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 tuber pipe (6) end of the same kind and two branch road tuber pipe ends all are provided with amount of wind and air speed detector (9) for the amount of wind that supplies of real-time supervision tuber pipe, according to air circumstance and operation condition in the hole, the wind pressure and the amount of wind and the air door (7) the amount of wind of dynamic adjustment axial fan (5), satisfy the face and need the wind requirement.
8. The construction ventilation method of the vertical shaft auxiliary parallel three-hole method tunnel as claimed in claim 2, which is characterized in that: and 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110188510.6A CN112780329A (en) | 2021-02-19 | 2021-02-19 | Construction ventilation method for vertical shaft assisted parallel three-hole method tunnel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110188510.6A CN112780329A (en) | 2021-02-19 | 2021-02-19 | Construction ventilation method for vertical shaft assisted parallel three-hole method tunnel |
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| CN112780329A true CN112780329A (en) | 2021-05-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113309537A (en) * | 2021-06-30 | 2021-08-27 | 济南市市政工程设计研究院（集团）有限责任公司 | Integrated tunnel pilot tunnel and method for realizing forward slag-discharging, ventilating, escaping and exploring |
-
2021
- 2021-02-19 CN CN202110188510.6A patent/CN112780329A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113309537A (en) * | 2021-06-30 | 2021-08-27 | 济南市市政工程设计研究院（集团）有限责任公司 | Integrated tunnel pilot tunnel and method for realizing forward slag-discharging, ventilating, escaping and exploring |
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