CN114033468A - Multi-channel tunnel sectional type ventilation method - Google Patents
Multi-channel tunnel sectional type ventilation method Download PDFInfo
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- CN114033468A CN114033468A CN202111390131.1A CN202111390131A CN114033468A CN 114033468 A CN114033468 A CN 114033468A CN 202111390131 A CN202111390131 A CN 202111390131A CN 114033468 A CN114033468 A CN 114033468A
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- inclined shaft
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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 DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
Abstract
A multi-channel tunnel sectional type ventilation method comprises the following steps: when the inclined shaft I and the inclined shaft II are respectively excavated towards the first main hole and the second main hole, the axial flow fan I is arranged in the inclined shaft I, the axial flow fan II is arranged in the inclined shaft II, a transverse channel is excavated between the first main hole and the second main hole, outlets at two ends of the transverse channel are respectively close to the inclined shaft I and the inclined shaft II, the inclined shaft I is used as an air exhaust channel, the inclined shaft II is used as an air inlet channel, the first main hole and the second main hole are continuously excavated forwards, an air outlet of the air pipe II points to the face of the second main hole, and the air pipe I extends through the newly excavated transverse channel and is arranged so that an air outlet of the air pipe I points to the face of the first main hole. The invention provides a multi-channel tunnel sectional type ventilation method, which can quickly and effectively seal a cable cut by adopting the matching use relationship of sealing cement, a first heat-shrinkable tube and a second heat-shrinkable tube, thereby improving the working efficiency in the cable installation process and greatly improving the sealing performance.
Description
Technical Field
The invention relates to the technical field of tunnel ventilation, in particular to a multi-channel tunnel sectional type ventilation method.
Background
In the multi-channel tunnel subsection construction process, inclined shaft or parallel pilot tunnel construction is generally adopted to increase the construction working face, but the tunnel construction ventilation system of the inclined shaft or the parallel pilot tunnel is complex, and the construction ventilation difficulty is increased, so that a brand new and efficient tunnel construction ventilation method needs to be provided.
Disclosure of Invention
The invention aims to provide a multi-channel tunnel sectional type ventilation method to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: a multi-channel tunnel sectional type ventilation method is used for realizing ventilation of two parallel main holes and inclined shafts communicated with the main holes, wherein the main holes comprise a main hole I and a main hole II, the inclined shafts comprise an inclined shaft I and an inclined shaft II, and the method comprises the following steps:
the method comprises the following steps: when the inclined shaft I and the inclined shaft II are respectively excavated towards the main hole I and the main hole II, an axial flow fan I is arranged in the inclined shaft I, an axial flow fan II is arranged in the inclined shaft II, the axial flow fan I is connected with an air pipe I used for conveying wind power, the air outlet of the air pipe I points to the working face of the inclined shaft I, the axial flow fan II is connected with an air pipe II used for conveying wind power, and the air outlet of the air pipe II points to the working face of the inclined shaft II until the two inclined shafts are respectively communicated with the main hole;
step two: excavating a transverse channel between the first main tunnel and the second main tunnel, wherein outlets at two ends of the transverse channel are close to a first inclined shaft and a second inclined shaft respectively, the first inclined shaft is used as an air exhaust channel, the second inclined shaft is used as an air inlet channel, the first axial flow fan and the second axial flow fan are uniformly distributed in the second inclined shaft, an air outlet of the second air pipe points to the face of the second main tunnel, and the second air pipe extends through the first transverse channel and leads the air outlet to point to the face of the first main tunnel;
step three: the first main tunnel and the second main tunnel are continuously excavated forwards, a next transverse channel is excavated, the previous transverse channel is closed by using a wind-blocking wall, the first axial flow fan and the second axial flow fan are both arranged in the second main tunnel at a distance in front of an outlet of the newly-excavated transverse channel, an air outlet of the second air pipe points to the face of the second main tunnel, and the first air pipe is arranged in an extending way through the newly-excavated transverse channel and leads the air outlet of the first air pipe to point to the face of the first main tunnel;
step four: and repeating the third step until the construction is finished, wherein the other excavated transverse channels are sealed by the wind-break walls before the next new transverse channel is excavated.
Further, in the step of uniformly arranging the first axial flow fan and the second axial flow fan in the second inclined shaft, the method further comprises the following steps:
the jet fans in the inclined shaft I, the inclined shaft II and the transverse channel are respectively provided with a preset number of jet fans, the jet fans in the inclined shaft I, the inclined shaft II and the transverse channel are all arranged in a straight line along the opening direction of the shaft or the channel, and the jet fans in the inclined shaft II are positioned behind the axial flow fans I and the axial flow fans II.
Further, in the step of arranging both the first axial flow fan and the second axial flow fan at a distance in front of the outlet of the newly excavated transverse channel in the main tunnel II, the method further comprises the following steps:
jet fans with preset quantity are respectively arranged in the first main tunnel, the second main tunnel, the first inclined shaft, the second inclined shaft and the transverse channel, the jet fans in the first main tunnel, the second main tunnel, the first inclined shaft, the second inclined shaft and the new transverse channel are all linearly arranged along the opening direction of the well or the channel, and the jet fan in the second main tunnel is positioned behind the first axial flow fan and the second axial flow fan.
According to the technical scheme, the multi-channel tunnel sectional type ventilation method can be applied to long-distance tunnel construction ventilation such as double holes or parallel pilot tunnels and inclined shafts, cross pollution of dirty wind can be effectively avoided, air circulation in the holes is guaranteed, construction safety is further improved, construction is convenient, the construction period can be greatly shortened, and construction progress is accelerated; and the adopted ventilation equipment is common, the application coverage is wide, the ventilation equipment can be repeatedly used, and the ventilation equipment has the positive effects of low investment cost, convenience in maintenance and the like.
Drawings
FIG. 1 is a schematic view of a tunnel with a main tunnel not communicating with an inclined shaft according to the present invention;
FIG. 2 is a schematic view of a tunnel with a main tunnel communicating with an inclined shaft and a transverse passage being excavated;
FIG. 3 is a schematic view of two or more tunnels formed by the main tunnel and the inclined shaft and the transverse passages.
In the figure: 10 to-be-excavated first positive hole, 11 to-be-excavated first positive hole, 111 to-be-excavated first hole face, 20 to-be-excavated second positive hole, 21 to-be-excavated second positive hole, 211 to-be-excavated second hole face, 01 to-be-excavated first transverse channel, 011 first transverse channel, 02 to-be-excavated second transverse channel, 021 second transverse channel, 30 to-be-inclined first hole, 31 to-be-inclined first hole face, 40 to-be-inclined second hole, 41 to-be-inclined second hole face, 50 to-be-axial fan first, 51 to-be-inclined first hole, 60 to-be-axial fan second hole, 61 to-be-inclined second hole, 70 to-be-axial fan and 80 to-be-wind-blocking wall.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to fig. 1 to 3.
The multi-channel tunnel sectional type ventilation method is suitable for ventilating two parallel main holes and inclined shafts communicated with the main holes, wherein the main holes comprise a main hole I11 and a main hole II 21, and the inclined shafts comprise an inclined shaft I30 and an inclined shaft II 40.
As shown in fig. 1, the diagram is a tunnel construction state diagram when the main tunnel and the inclined shaft are not communicated in the first step, at this time, neither the main tunnel one 11 nor the main tunnel two 21 is excavated, at this time, when the main tunnel one 10 to be excavated and the main tunnel two 20 to be excavated are located in the diagram, the axial flow fan one 50 is arranged in the inclined shaft one 40, and the axial flow fan two 60 is arranged in the inclined shaft two 30 when the main tunnel one (i.e., the main tunnel one 10 to be excavated) and the main tunnel two 20 (i.e., the main tunnel two 20 to be excavated) are excavated, respectively, the axial flow fan one 50 is connected with the air pipe one 51 for conveying wind power, an air outlet of the air pipe one 51 points to the inclined shaft one tunnel face 31, the axial flow fan two 60 is connected with the air pipe two 61 for conveying wind power, an air outlet of the air pipe two 61 points to the inclined shaft two tunnel face 41, until the two inclined shafts are communicated with the main tunnel.
Here, as can be understood by those skilled in the art, the axial flow fans are used for respectively ventilating the inclined shafts, in order to ensure the ventilation effect, the air outlet of the first air pipe 51 is located at one side in the inclined shaft, and after air is exhausted, the wind direction is swirled by using a working face 31 of the inclined shaft and is exhausted outwards along the length direction of the first inclined shaft 30; similarly, the air outlet of the second air pipe 61 is located at one side in the shaft, and after air is exhausted, the wind direction is swirled by using the second face surface 41 of the inclined shaft and is exhausted outwards along the length direction of the second inclined shaft 40.
Referring to fig. 2, the figure is a schematic view of a tunnel in which the main tunnel is communicated with the inclined shaft and a transverse channel is excavated in the second step, a transverse channel first 011 is excavated from the to-be-excavated transverse channel first 01, an opening at one end of the transverse channel is located opposite to an outlet of the inclined shaft second 40, an opening at the other end of the transverse channel is located adjacent to an outlet of the inclined shaft first 30, in the second step, the inclined shaft first 30 is used as an exhaust channel, the inclined shaft second 40 is used as an intake channel, at this time, the axial flow fan first 50 and the axial flow fan second 60 are uniformly arranged in the inclined shaft second 50, an air outlet of the air pipe second 61 points to a working face 211 of the main tunnel second, and the air pipe first 51 is extended and arranged through the transverse channel first 011 and an air outlet of the air pipe points to a working face 111 of the main tunnel.
Here, it can be understood by those skilled in the art that after the first transverse channel 011 is opened, the first inclined shaft 30 and the second inclined shaft 40 can be communicated through the first transverse channel 011, air is supplied through the first axial flow fan 50 and the second axial flow fan 60 respectively to ensure air supply in the first main tunnel 11 and the second main tunnel 21, and meanwhile, in order to further facilitate ventilation and air guiding, the jet flow fans 70 are respectively arranged in the first inclined shaft 30, the second inclined shaft 40 and the first transverse channel 011, and the jet flow fans 70 are arranged in the length direction in the inclined shaft or the channel to form effective air direction drainage so as to ensure efficient circulation of air flow.
Referring to fig. 3, which is a schematic view of a tunnel in which a main hole communicates with an inclined shaft and two or more transverse channels are excavated in step three, namely, on the basis of the step two, the first main tunnel 11 and the second main tunnel are dug forwards at the same time, and the first inclined shaft 30 and the second inclined shaft 40 are utilized to realize the circulation of airflow, in the step, the first main tunnel 11 and the second main tunnel 21 are dug forwards continuously, and a new transverse channel (namely, the transverse channel II 021) is excavated when the transverse channel II to be excavated is positioned, at the moment, the wind-shield wall 80 is used for sealing the previous transverse channel (namely, the transverse channel I011), and the axial flow fan I50 and the axial flow fan II 60 are both arranged in the main tunnel II 21 at a distance in front of the outlet of the newly excavated transverse channel (namely the transverse channel II 021), the air outlet of the second air pipe 61 points to the second tunnel face 211 of the main tunnel, and the first air pipe 51 extends through the newly excavated transverse channel (i.e., the transverse channel two 021) and is arranged to point to the first tunnel face 111 of the main tunnel.
Here, it can be understood by those skilled in the art that, based on the second step, the positions of the first axial flow fan 50 and the second axial flow fan 60 are followed up, and the first transverse channel 011 excavated before is blocked, so that the second inclined shaft 40, the second positive hole 21, the second transverse channel 021, the first positive hole 11 and the first inclined shaft 30 form an airflow channel, and meanwhile, in order to further facilitate ventilation and air guiding, the jet flow fans 70 are respectively arranged in the first inclined shaft 30, the second inclined shaft 40, the first positive hole 11, the second positive hole 21 and the second transverse channel 021, and the jet flow fans 70 are arranged in the length directions of the first inclined shaft, the second positive hole and the channel, so that effective airflow direction drainage can be formed, and efficient circulation of airflow can be ensured.
In the fourth step, the construction method in the third step is repeated until the construction is completed, and it is noted that all the other excavated transverse channels are sealed by the wind-blocking walls before the next new transverse channel is excavated, and it should be noted that in order to ensure the smoothness of the airflow, the wind-blocking walls need to be respectively arranged at the outlets at the two ends of the transverse channel so as to ensure that the wind-blocking walls 80 and the inner wall of the main tunnel are located on the same plane, thereby reducing the turbulence and improving the stability of the airflow.
In the scheme, the adopted axial flow fan can be but is not limited to a 160KW axial flow fan, the adopted air pipe is phi 1.8m, the adopted jet flow fan can be but is not limited to 55KW, and the distance between the air opening of the air pipe and the tunnel face of the main tunnel is not more than 15 m.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (3)
1. A multi-channel tunnel sectional type ventilation method is used for realizing ventilation of two parallel main holes and inclined shafts communicated with the main holes, wherein the main holes comprise a main hole I and a main hole II, and the inclined shafts comprise an inclined shaft I and an inclined shaft II, and is characterized by comprising the following steps:
the method comprises the following steps: when the inclined shaft I and the inclined shaft II are respectively excavated towards the main hole I and the main hole II, an axial flow fan I is arranged in the inclined shaft I, an axial flow fan II is arranged in the inclined shaft II, the axial flow fan I is connected with an air pipe I used for conveying wind power, the air outlet of the air pipe I points to the working face of the inclined shaft I, the axial flow fan II is connected with an air pipe II used for conveying wind power, and the air outlet of the air pipe II points to the working face of the inclined shaft II until the two inclined shafts are respectively communicated with the main hole;
step two: excavating a transverse channel between the first main tunnel and the second main tunnel, wherein outlets at two ends of the transverse channel are close to a first inclined shaft and a second inclined shaft respectively, the first inclined shaft is used as an air exhaust channel, the second inclined shaft is used as an air inlet channel, the first axial flow fan and the second axial flow fan are uniformly distributed in the second inclined shaft, an air outlet of the second air pipe points to the face of the second main tunnel, and the second air pipe extends through the first transverse channel and leads the air outlet to point to the face of the first main tunnel;
step three: the first main tunnel and the second main tunnel are continuously excavated forwards, a next transverse channel is excavated, the previous transverse channel is closed by using a wind-blocking wall, the first axial flow fan and the second axial flow fan are both arranged in the second main tunnel at a distance in front of an outlet of the newly-excavated transverse channel, an air outlet of the second air pipe points to the face of the second main tunnel, and the first air pipe is arranged in an extending way through the newly-excavated transverse channel and leads the air outlet of the first air pipe to point to the face of the first main tunnel;
step four: and repeating the third step until the construction is finished, wherein the other excavated transverse channels are sealed by the wind-break walls before the next new transverse channel is excavated.
2. A multi-channel tunnel sectional type ventilation method is characterized in that in the step of uniformly arranging a first axial flow fan and a second axial flow fan in a second inclined shaft, the method further comprises the following steps:
the jet fans in the inclined shaft I, the inclined shaft II and the transverse channel are respectively provided with a preset number of jet fans, the jet fans in the inclined shaft I, the inclined shaft II and the transverse channel are all arranged in a straight line along the opening direction of the shaft or the channel, and the jet fans in the inclined shaft II are positioned behind the axial flow fans I and the axial flow fans II.
3. A multi-channel tunnel sectional type ventilation method is characterized in that: in the step of arranging both the axial flow fan I and the axial flow fan II at a distance in front of the outlet of the newly excavated transverse channel in the main tunnel II, the method further comprises the following steps:
jet fans with preset quantity are respectively arranged in the first main tunnel, the second main tunnel, the first inclined shaft, the second inclined shaft and the transverse channel, the jet fans in the first main tunnel, the second main tunnel, the first inclined shaft, the second inclined shaft and the new transverse channel are all linearly arranged along the opening direction of the well or the channel, and the jet fan in the second main tunnel is positioned behind the first axial flow fan and the second axial flow fan.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111390131.1A CN114033468B (en) | 2021-11-19 | 2021-11-19 | Multi-channel tunnel sectional type ventilation method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111390131.1A CN114033468B (en) | 2021-11-19 | 2021-11-19 | Multi-channel tunnel sectional type ventilation method |
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| CN114033468A true CN114033468A (en) | 2022-02-11 |
| CN114033468B CN114033468B (en) | 2023-05-23 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108301859A (en) * | 2018-03-23 | 2018-07-20 | 西南交通大学 | A kind of Large Underground water seal cave depot group push-pull type construction ventilation method and its system |
| CN109958467A (en) * | 2019-04-16 | 2019-07-02 | 中铁十七局集团第二工程有限公司 | A kind of dust control by ventilation method for constructing tunnel |
| CN111188645A (en) * | 2020-03-20 | 2020-05-22 | 上海进贤机电科技有限公司 | Ventilation system of multi-station axial flow fan for tunnel |
| CN112780330A (en) * | 2021-02-19 | 2021-05-11 | 中交第二公路工程局有限公司 | Construction ventilation method for parallel three-hole tunnel press-in type ventilation |
| WO2021196707A1 (en) * | 2020-03-31 | 2021-10-07 | 中铁五局集团有限公司 | Staged ventilation method based on construction of complex cavern group |
-
2021
- 2021-11-19 CN CN202111390131.1A patent/CN114033468B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108301859A (en) * | 2018-03-23 | 2018-07-20 | 西南交通大学 | A kind of Large Underground water seal cave depot group push-pull type construction ventilation method and its system |
| CN109958467A (en) * | 2019-04-16 | 2019-07-02 | 中铁十七局集团第二工程有限公司 | A kind of dust control by ventilation method for constructing tunnel |
| CN111188645A (en) * | 2020-03-20 | 2020-05-22 | 上海进贤机电科技有限公司 | Ventilation system of multi-station axial flow fan for tunnel |
| WO2021196707A1 (en) * | 2020-03-31 | 2021-10-07 | 中铁五局集团有限公司 | Staged ventilation method based on construction of complex cavern group |
| CN112780330A (en) * | 2021-02-19 | 2021-05-11 | 中交第二公路工程局有限公司 | Construction ventilation method for parallel three-hole tunnel press-in type ventilation |
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