CN210178400U - Hot-pressing type tunnel ventilation system for high-altitude high-ground-temperature long tunnel - Google Patents
Hot-pressing type tunnel ventilation system for high-altitude high-ground-temperature long tunnel Download PDFInfo
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- CN210178400U CN210178400U CN201921055270.7U CN201921055270U CN210178400U CN 210178400 U CN210178400 U CN 210178400U CN 201921055270 U CN201921055270 U CN 201921055270U CN 210178400 U CN210178400 U CN 210178400U
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Abstract
The utility model discloses a hot-pressing tunnel ventilation system for high-altitude high-ground-temperature long tunnels, which belongs to the field of tunnel construction ventilation and comprises a tunnel main body and a ventilation shaft, wherein the ventilation shaft is of a vertical shaft structure or an inclined shaft structure, and the tunnel main body comprises a traffic and slag discharge passage area, a working area and a non-personnel passing area; the working area is positioned near the tunnel face; the traffic and slag discharge passage area is communicated with the working area; the non-personnel passing area is communicated with the traffic and slag discharging passage area; the lower extreme and the regional intercommunication of non-personnel's traffic of ventilation shaft, the upper end and the outdoor intercommunication of ventilation shaft. The utility model discloses utilize the inside hot pressing in tunnel, at the inside natural draft that forms great amount of wind in the tunnel, this natural draft need not with the help of outside mechanical equipment, and the saving engineering investment that can be very big can also improve the inside ventilation amount of wind in tunnel simultaneously effectively.
Description
Technical Field
The utility model relates to a tunnel construction ventilation field especially relates to a hot pressing formula tunnel ventilation system and method for high altitude high ground temperature long tunnel.
Background
At present, a number of high-ground-temperature ultra-long tunnels are constructed, and cooling measures for the high-ground-temperature ultra-long tunnels are mature day by day. Among them, sprinkling and ice-cube cooling are the two most common and effective measures. And the high-altitude high-ground-temperature ultra-long tunnel has no finished example. Moreover, cooling measures that have been used in plateau areas are not available in high-altitude areas.
In the tunnel construction process, too much water vapor can block the breathing of constructors, and the health of the constructors is seriously threatened. The boiling point of water in the high-altitude area is more than ten degrees lower than that in the plain area, and the water is easier to evaporate into water vapor. Then, the traditional sprinkling cooling mode in the high-altitude area cannot be used.
The ice block cooling measures are huge in energy consumption and tedious in management, so that local cooling is usually realized and the cooling of the body surface of a constructor is realized in the construction of a high-ground-temperature ultra-long tunnel. In high altitude areas, the high temperature air in the construction personnel breathing environment will aggravate the anoxic altitude reaction, thereby causing the damage of the lung and the heart. Therefore, the ice block cooling measures generally adopted in plain areas are difficult to avoid the damage of personnel in the construction of the high-altitude high-ground-temperature ultra-long tunnel, and therefore, the traditional ice block cooling mode in the high-altitude areas cannot be used.
In addition, according to traditional long tunnel construction ventilation mode for sending near tunnel face with outdoor air through the tuber pipe, the rethread tunnel is aired exhaust outdoors, when the tunnel is longer and ground temperature is higher, completely through the mode of tuber pipe air supply, its tuber pipe overlength, the cost is higher, its air volume can not satisfy the demand of cooling far away moreover.
In conclusion, the problem of ventilation in the construction of the high-altitude high-ground-temperature ultra-long tunnel is a problem which is not solved at present.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem provide a hot pressing formula tunnel ventilation system for high altitude high ground temperature long tunnel can improve the natural draft amount of wind in the high altitude high ground temperature overlength tunnel work progress by a wide margin.
The utility model provides a technical scheme that its technical problem adopted is: the hot-pressing type tunnel ventilation system for the high-altitude high-ground-temperature long tunnel comprises a tunnel main body and a ventilation shaft, wherein the ventilation shaft is of a vertical shaft structure or an inclined shaft structure, and the tunnel main body comprises a traffic and slag discharging passage area, a working area and a non-personnel passing area; the working area is positioned near the tunnel face; the traffic and slag discharge passage area is communicated with the working area; the non-personnel passing area is communicated with the traffic and slag discharging passage area; the lower end of the ventilation shaft is communicated with a non-personnel passing area, and the upper end of the ventilation shaft is communicated with the outside; a traffic and slag discharge passage area, a non-personnel passage area and a ventilation shaft are communicated in sequence to form a ventilation flow passage; and no heat insulation structure is arranged in the non-personnel passing area.
Further, the method comprises the following steps: the non-personnel passing area is communicated with a position close to the tunnel face in the traffic and slag discharge passage area; the lower end of the ventilation shaft is communicated with a position far away from a traffic and slag discharging passage area in a non-personnel passing area.
Further, the method comprises the following steps: arranging a concrete lining and heat insulation structure in a traffic and slag discharging passage area; when the strength of the corresponding tunnel rock wall in the non-personnel passing area meets the construction safety requirement, no concrete lining is arranged in the non-personnel passing area.
Further, the method comprises the following steps: an evaporative condensing air conditioner is further arranged in the tunnel main body and comprises an indoor unit and an outdoor unit which are connected, the indoor unit is arranged in a working area, and the outdoor unit is arranged in a non-personnel passing area.
Further, the method comprises the following steps: and a booster fan is arranged at the outlet of the ventilation shaft.
Further, the method comprises the following steps: the mechanical air exhaust mechanism comprises a drainage fan and an air supply pipeline, an air inlet port of the air supply pipeline is arranged in the working area and close to the position near a corresponding palm surface, an air outlet port of the air supply pipeline is arranged in the non-personnel traffic area, and the drainage fan is arranged in the air supply pipeline.
Further, the method comprises the following steps: the tunnel main body is a tunnel structure corresponding to drilling and blasting construction, and comprises a first main tunnel, a second main tunnel, parallel pilot holes, connection holes and branch holes, wherein the first main tunnel, the second main tunnel and the parallel pilot holes are arranged in parallel, the parallel pilot holes are positioned between the first main tunnel and the second main tunnel, the connection holes are arranged between the first main tunnel and the parallel pilot holes at intervals, and the connection holes are arranged between the second main tunnel and the parallel pilot holes at intervals; the middle part of the first main tunnel is communicated with one end of the branch hole, and the other end of the branch hole is communicated with the outside; the lower end of the ventilation shaft is communicated with the middle part of the second main tunnel; only corresponding connection holes closest to the tunnel faces at two ends of the first main tunnel are reserved in all connection holes arranged between the first main tunnel and the parallel pilot tunnels to be communicated, and the other connection holes are closed; only corresponding connection holes closest to the tunnel faces at two ends of the second main tunnel and corresponding connection holes closest to the ventilation shaft in the middle are kept in connection among the connection holes arranged between the second main tunnel and the parallel pilot tunnels, and the other connection holes are closed; the height of the ventilation shaft is not lower than 1/50 of the sum of the lengths of the parallel pilot tunnel and the branch tunnel of the tunnel main body in the corresponding construction section.
Further, the method comprises the following steps: the tunnel main body is a tunnel structure corresponding to TBM construction, and comprises a first main tunnel, a second main tunnel, parallel pilot holes and contact holes, wherein the first main tunnel, the second main tunnel and the parallel pilot holes are arranged in parallel, the parallel pilot holes are positioned between the first main tunnel and the second main tunnel, the contact holes are arranged between the first main tunnel and the parallel pilot holes at intervals, and the contact holes are arranged between the second main tunnel and the parallel pilot holes at intervals; the tunneling starting ends of the parallel pilot tunnel, the first main tunnel and the second main tunnel are all located at the same end, a plugging body is arranged at the tunneling starting end of the parallel pilot tunnel for plugging, and the first main tunnel and the second main tunnel are communicated with the outside through the tunneling starting ends; the lower end of the ventilation shaft is communicated with a part of the parallel pilot tunnel close to the tunneling starting end of the parallel pilot tunnel; only the connection hole closest to the tunnel face of the first main tunnel is reserved in all connection holes arranged between the first main tunnel and the parallel pilot tunnels for conduction, and the other connection holes are closed; only the connection hole closest to the tunnel face of the second main tunnel is reserved in all connection holes arranged between the second main tunnel and the parallel pilot tunnels for conduction, and the other connection holes are closed; the height of the ventilation shaft is not lower than 1/35 of the length of the parallel pilot tunnel of the tunnel body in the corresponding construction section.
A hot pressing formula tunnel ventilation system for high altitude high ground temperature long tunnel's beneficial effect be:
1. a hot pressing formula tunnel ventilation system for long tunnel of high altitude high ground temperature, can make full use of high altitude high ground temperature area outdoor temperature low, the indoor outer air temperature difference of tunnel characteristics big, form the hot pressing through setting up corresponding non-personnel current region and ventilation shaft simultaneously, and then the natural draft of the great amount of wind of inside formation in the tunnel, this natural draft need not with the help of outside mechanical equipment, can be very big saving engineering investment, can also improve the inside ventilation amount of wind in tunnel simultaneously effectively.
2. The utility model discloses do not add in the regional inside insulation construction that establishes of non-personnel are current to release the terrestrial heat that the regional corresponds of non-personnel is current as far as possible, improve the regional interior air temperature of non-personnel's current, thereby produce bigger heat pressure differential, with the bigger natural draft volume of formation.
3. The utility model discloses corresponding natural draft air current has been formed inside the tunnel, consequently can further set up high energy efficiency cooling equipment such as evaporation formula condensation air conditioner inside the tunnel, realized being applied to the effect of the inside aeration cooling in tunnel with high energy efficiency cooling equipment such as evaporation formula condensation air conditioner.
4. A hot pressing formula tunnel ventilation system for high altitude high ground temperature long tunnel, its natural draft volume can improve by a wide margin, even have steam to produce in the tunnel also can be carried the discharge fast by the natural draft air current, can avoid causing the damage to the constructor effectively.
Additionally, the utility model provides a hot-pressing tunnel ventilation method for high altitude high ground temperature long tunnel, for adopting the aforesaid a hot-pressing tunnel ventilation system for high altitude high ground temperature long tunnel, utilize the interior rock of ventilating shaft and non-personnel's passage region to release heat in order to heat the inside air and form the hot pressing, the natural draft power that produces through the hot pressing so that the outdoor air loops through after getting into from the port of traffic and slag tap passage region behind the port of traffic and slag tap passage region, non-personnel's passage region and ventilating shaft and then discharges to outdoor from the top of ventilating shaft.
Further, the method comprises the following steps: the ambient temperature in the traffic and tapping channel area and in the working area is controlled to be not higher than 28 ℃.
Above-mentioned a hot pressing formula tunnel ventilation method for high altitude high ground temperature long tunnel, for utilizing the utility model for high altitude high ground temperature long tunnel's hot pressing formula tunnel ventilation system to form the natural draft air current in the tunnel and realize the aeration cooling effect to the tunnel inside. In addition, the construction environmental temperature of constructors in corresponding areas can be ensured to meet corresponding construction requirements by controlling the environmental temperature in the traffic and slag discharging passage areas and the working areas not to be higher than 28 ℃.
Drawings
FIG. 1 is a natural draft air flow diagram of the technical scheme of the utility model adopted in the drilling and blasting construction state;
FIG. 2 is a flow chart of natural ventilation air adopting the technical scheme of the utility model in a TBM construction state;
FIG. 3 is a schematic view of an installation position of an evaporative condensing air conditioner;
FIG. 4 is a schematic view of the installation position of the mechanical air exhausting mechanism;
FIG. 5 is a schematic diagram of the division of regions in the structure shown in FIG. 1;
FIG. 6 is a schematic diagram of the division of the regions in the structure shown in FIG. 2;
labeled as: the system comprises a first main tunnel 1, a second main tunnel 2, a parallel pilot tunnel 3, a connection hole 4, a closed connection hole 41, a ventilation shaft 5, a port 6, a branch hole 7, an evaporative condensation air conditioner 8, a booster fan 9, a mechanical exhaust mechanism 10, a tunnel face 11, an indoor unit 12, an outdoor unit 13, a drainage fan 14, an air supply pipeline 15, natural ventilation airflow 16, a blocking body 17, a traffic and slag discharge channel area 18, a working area 19 and a non-personnel passing area 20.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
A hot pressing formula tunnel ventilation system for high altitude high ground temperature long tunnel, wherein high altitude high ground temperature long tunnel, indicate to be in the tunnel construction that height above sea level is higher, ground temperature is higher and tunnel length is longer relatively, specific high altitude indicates the height above sea level that is not less than 3000m, high ground temperature indicates that excavation initial rock temperature is not less than the temperature of "10 ℃ below the boiling point", long tunnel indicates that the holistic length in tunnel is not less than 10000 m.
The hot-pressing tunnel ventilation system for the high-altitude high-ground-temperature long tunnel comprises a tunnel main body and a ventilation shaft 5, wherein the ventilation shaft 5 is of a vertical shaft structure or an inclined shaft structure, and the tunnel main body comprises a traffic and slag discharging passage area 18, a working area 19 and a non-personnel passing area 20; the working area 19 is located near the tunnel face 11; the traffic and slag channel area 18 is communicated with the working area 19; the non-personnel passing area 20 is communicated with the traffic and slag channel area 18; the lower end of the ventilation shaft 5 is communicated with the non-personnel passing area 20, and the upper end of the ventilation shaft 5 is communicated with the outside; a ventilation flow channel is formed after the communication and slag discharge passage area 18, the non-personnel passage area 20 and the ventilation shaft 5 are communicated in sequence; no insulation is provided in the non-personnel passing area 20.
Wherein, the traffic and slag tapping passage area 18 refers to an area for traffic entering and exiting and slag tapping in the tunnel construction process, and the area is communicated with the outdoor through the corresponding port 6 thereof to be used as a port for entering and exiting the inside of the tunnel. The utility model discloses the air intake of the natural draft air current that forms in the tunnel also is for the above-mentioned corresponding port 6 of traffic and slag discharging channel region 18 to according to the difference of construction method and the difference of tunnel structure, the concrete position of its port 6 also distinguishes, for example refer to and show in figure 1, when the tunnel construction mode is the drilling and blasting method construction mode, the port 6 of its traffic and slag discharging channel region 18 sets up to the outer end port of corresponding branch hole 7 in the drilling and blasting method construction mode; and referring to fig. 2, when the tunnel construction mode is the TBM method, the port 6 of the traffic and slag discharge passage area 18 is set as the tunneling start port of the corresponding main tunnel.
The working area 19 is a main tunneling operation area in the tunnel construction process, and the working area is located near the tunnel face 11, and the range of the working area 19 is correspondingly different according to different construction modes, different construction equipment and the like, and generally the working area 19 is located within a tunnel length range of about 150 meters from the corresponding tunnel face 11.
In addition, the non-personnel passing area 20 refers to a corresponding tunnel area which is set to be free from personnel passing in and out during the tunnel construction process, and since no personnel can pass through the area, the environmental temperature in the area can be allowed to be higher than the environmental temperature required by corresponding construction without the requirement of the construction environmental temperature required by personnel passing in and out during the construction process.
The utility model discloses be provided with shaft structure or inclined shaft structure's ventilating shaft 5 on the basis of tunnel main part, and with ventilating shaft 5's lower extreme and the current regional 20 intercommunication of non-personnel, still do not set up insulation construction in the current regional 20 of non-personnel simultaneously, its purpose then is through the current regional 20 of non-personnel and ventilating shaft 5 at the inside hot pressing that forms in tunnel, and then the inside natural draft that forms great amount of wind in tunnel, this natural draft's ventilation runner is for by traffic and the regional 18 of slag discharging passageway, the current regional 20 of non-personnel and ventilating shaft 5 form the ventilation runner after communicateing in proper order, for example, refer to the runner region that the arrow point-indicated natural draft 16 corresponds in the drawing. This natural draft need not with the help of outside mechanical equipment, can very big saving engineering investment, can also improve the inside ventilation amount of wind in tunnel simultaneously effectively. Without loss of generality, the utility model discloses well ventilating shaft 5 can be vertical setting up to the shaft structure, also can be the slope set up to the inclined shaft structure to satisfy the upper end oral area elevation that ventilating shaft 5 is higher than the elevation of the port 6 of corresponding air intake, ensure simultaneously can be through ventilating shaft 5 in the inside corresponding hot pressing of formation in the tunnel, and then form corresponding natural draft air current inside the tunnel. In addition, the heat preservation structure is not arranged in the non-personnel passing area 20, so that the temperature of rocks around the tunnel can be gradually reduced as time goes on, and structural deformation of the tunnel body caused by temperature difference change can be avoided in the long run.
More preferably, because the natural ventilation airflow 16 in the present invention is the sequential ventilation along the communication between the traffic and slag discharging passage region 18, the non-personnel passage region 20 and the ventilation shaft 5, in order to make the natural ventilation airflow 16 formed inside the tunnel cover a larger area inside the tunnel as much as possible, the non-personnel passage region 20 is preferably arranged to communicate with the traffic and slag discharging passage region 18 at a position close to the tunnel face 11; the lower end of the ventilation shaft 5 communicates with a location within the non-personnel access area 20 remote from the traffic and tapping access area 18.
In addition, the traffic and the regional 18 of passageway of slagging tap are because can be used for constructor current, and consequently this region has corresponding requirement to construction environment temperature, consequently the utility model discloses in set up concrete lining and insulation construction in traffic and the regional 18 of passageway of slagging tap to reduce the geothermol power release of the rock mass in this region.
In addition, when the strength of the corresponding tunnel rock wall in the non-personnel passing area 20 meets the construction safety requirement, concrete lining can be not arranged in the non-personnel passing area 20; the concrete lining is a layer of concrete layer which is lined in the tunnel after the tunnel is excavated so as to support the exposed rock wall in the tunnel. Therefore, when the strength of the exposed rock wall formed after the tunnel is excavated meets the construction safety requirement, the concrete lining does not need to be arranged, so that the rock wall in the tunnel is directly exposed, the geothermal energy of the rock mass is better released to heat the air temperature in the non-personnel passing area 20, and the air quantity of the natural ventilation airflow 16 is further improved.
In addition, referring to fig. 3, the present invention further provides an evaporative condensation air conditioner 8 in the tunnel main body, the evaporative condensation air conditioner 8 includes an indoor unit 12 and an outdoor unit 13 connected to each other, the indoor unit 12 is disposed in a work area 19, and the outdoor unit 13 is disposed in a non-personnel passage area 20. Because the utility model can form the corresponding natural ventilation airflow 16 in the tunnel; therefore, the corresponding outdoor unit 13 can be directly installed in the natural ventilation airflow 16 in the non-people passing area 20, the heat generated by the outdoor unit 13 can be taken out by the natural ventilation airflow 16, and the heat pressure of the ventilation shaft 5 can be further improved by the part of the heat. Meanwhile, by arranging the indoor unit 12 in the working area 19, the air in the working area 19 can be cooled through the indoor unit 12, and the working area 19 is further ensured to be in a lower temperature state, such as being maintained below 28 ℃, so as to meet the construction environment temperature requirement of constructors. The utility model discloses a form natural draft air current 16 and provide the possibility for using evaporative condensation air conditioner 8 to cool down inside the tunnel, and because evaporative condensation air conditioner 8 has very high energy efficiency ratio, consequently can practice thrift a large amount of costs for the engineering construction.
More specifically, in the evaporative condensation air conditioner 8 of the present invention, a plurality of indoor units 12 can share the same outdoor unit 13, as shown in fig. 3, that is, two indoor units 12 are connected to the same outdoor unit 13, and the two indoor units 12 are respectively installed in the working areas 19 corresponding to different palm surfaces 11.
In addition, when the suction power required by the ventilation and cooling in the whole tunnel cannot be met only by the hot pressing formed in the utility model, namely when the airflow flow required by the ventilation and cooling in the tunnel cannot be met only by the natural ventilation airflow 16 formed in the utility model; the utility model discloses in can be provided with booster fan 9 in the exit of ventilating shaft 5, booster fan 9 can set up the oral area at ventilating shaft 5 to booster fan 9's size can just be unanimous with ventilating shaft 5's size. The situation that the suction power generated by hot pressing is insufficient can be compensated through the booster fan 9, and the ventilation quantity in the tunnel can be further improved; through the mechanical air volume that booster fan 9 formed promptly with the utility model discloses the natural draft volume that well formed combines together in order to satisfy the required amount of wind of tunnel aeration cooling.
In addition, as shown in the attached drawing 4, the utility model discloses further be provided with one set of mechanical type exhaust mechanism 10 that corresponds with every work area 19, mechanical type exhaust mechanism 10 includes drainage fan 14 and blast pipe 15, the air inlet port of blast pipe 15 sets up in work area 19 and near corresponding face 11, and the air outlet port of blast pipe 15 sets up in non-personnel current region 20, drainage fan 14 installs in blast pipe 15. Since the tunnel section near the tunnel face 11 is usually in the form of a blind hole, it cannot form part of the natural ventilation airflow 16 of the present invention, and thus cannot form a natural ventilation airflow near the tunnel face 11, which is usually a working area 19 where the constructors are relatively concentrated near the tunnel face 11, and thus is very important for ventilation near the tunnel face 11. The utility model discloses in realized will through utilizing mechanical type exhaust mechanism 10 the utility model discloses the air in the natural draft air current 16 of well formation is sent into near face 11 with partial air through drainage fan 14 and supply-air duct 15's mode and is carried out the forced circulation, and then realizes near the ventilation of face 11, and corresponding work area 19's aeration cooling also can realize.
Referring to fig. 1 and 5, the tunnel structure corresponding to the drilling and blasting construction method of the present invention is applied, wherein the tunnel main body includes a first main tunnel 1, a second main tunnel 2, a parallel pilot tunnel 3, a connection hole 4 and a branch hole 7, wherein the first main tunnel 1, the second main tunnel 2 and the parallel pilot tunnel 3 are arranged in parallel with each other, the parallel pilot tunnel 3 is located between the first main tunnel 1 and the second main tunnel 2, the connection hole 4 is arranged between the first main tunnel 1 and the parallel pilot tunnel 3 at an interval, and the connection hole 4 is arranged between the second main tunnel 2 and the parallel pilot tunnel 3 at an interval; the middle part of the first main tunnel 1 is communicated with one end of a branch hole 7, and the other end of the branch hole 7 is communicated with the outside; the lower end of the ventilation shaft 5 is communicated with the middle part of the second main tunnel 2; only the corresponding connection holes 4 closest to the tunnel faces 11 at the two ends of the first main tunnel 1 are reserved in the connection holes 4 arranged between the first main tunnel 1 and the parallel pilot tunnels 3 to be communicated, and the other connection holes 4 are closed; only the corresponding connection holes 4 closest to the tunnel faces 11 at the two ends of the second main tunnel 2 are communicated with the corresponding connection holes 4 in the middle closest to the ventilation shaft 5 in each connection hole 4 arranged between the second main tunnel 2 and the parallel pilot tunnel 3, and the other connection holes 4 are closed; the height of the ventilation shaft 5 is not lower than 1/50 of the sum of the lengths of the parallel pilot tunnel 3 and the branch tunnel 7 of the tunnel body in the corresponding construction section. Through the arrangement, the natural ventilation airflow 16 formed in the tunnel structure corresponding to the drilling and blasting construction can cover the range of the tunnel to the maximum extent; in addition, the ventilation shaft 5 is provided at a height not lower than 1/50 of the sum of the lengths of the parallel pilot tunnel 3 and the branch tunnels 7 of the tunnel body in the corresponding construction section, in order to ensure that the ventilation shaft 5 has a sufficient height to satisfy the requirement that the hot press formed can generate a large natural ventilation air flow 16.
In addition, as shown in fig. 2 and fig. 6, for the utility model discloses be applied to the tunnel structure that TBM method construction corresponds, wherein the tunnel main part includes first main tunnel 1, second main tunnel 2, parallel pilot hole 3 and connection hole 4, wherein first main tunnel 1, second main tunnel 2 and parallel pilot hole 3 are parallel to each other and parallel pilot hole 3 is located between first main tunnel 1 and second main tunnel 2, and connection hole 4 is provided at the interval between first main tunnel 1 and parallel pilot hole 3, and connection hole 4 is provided at the interval between second main tunnel 2 and parallel pilot hole 3; the respective tunneling starting ends of the parallel pilot tunnel 3, the first main tunnel 1 and the second main tunnel 2 are positioned at the same end, a plugging body 17 is arranged at the tunneling starting end of the parallel pilot tunnel 3 for plugging, and the first main tunnel 1 and the second main tunnel 2 are communicated with the outside through the respective tunneling starting ends; the lower end of the ventilation shaft 5 is communicated with the part of the parallel pilot tunnel 3 close to the tunneling starting end; only the contact hole 4 closest to the tunnel face 11 of the first main tunnel 1 is kept in the contact holes 4 arranged between the first main tunnel 1 and the parallel pilot holes 3 to be communicated, and the other contact holes 4 are closed; only the connection hole 4 closest to the tunnel face 11 of the second main tunnel 2 is reserved in each connection hole 4 arranged between the second main tunnel 2 and the parallel pilot tunnel 3 for conduction, and the other connection holes 4 are closed; the height of said ventilation shaft 5 is not lower than 1/35 of the length of the tunnel body parallel to the pilot tunnel 3 in the corresponding construction section. Through the arrangement, the natural ventilation airflow 16 formed in the tunnel structure corresponding to the TBM construction can cover the range of the tunnel to the maximum extent; in addition, the ventilation shaft 5 is provided at a height not lower than 1/35 of the length of the tunnel body parallel to the pilot tunnel 3 in the corresponding construction section, in order to ensure that the ventilation shaft 5 has a sufficient height to meet the requirement that the resulting hot press can generate a large natural ventilation air flow 16.
Without loss of generality, in a specific tunnel construction process, the connection hole 4 arranged between the corresponding main tunnel and the parallel guide hole 3 can be reasonably selected to be closed according to ventilation requirements, and the purpose is that the natural ventilation airflow 16 formed in the tunnel can cover a larger-range tunnel area as much as possible so as to improve the tunnel area through which the natural ventilation airflow 16 flows, and further improve the overall ventilation and cooling effects of the natural ventilation airflow 16 on the tunnel. More specifically, the distance between the connection holes 4 in the heading direction along the tunnel may be set to 500 m.
Additionally, a hot-pressing tunnel ventilation method for high altitude high ground temperature long tunnel, for adopting the aforesaid the hot-pressing tunnel ventilation system for high altitude high ground temperature long tunnel, this ventilation method is for utilizing the heat release of the rock in ventilating shaft 5 and the non-personnel passage area 20 to form the hot pressing in order to heat the inside air and form the hot pressing, the natural draft power that produces through the hot pressing so that the outdoor air loops through after getting into from the port 6 of the regional 18 of traffic and slag tap passageway 18, the regional 20 of non-personnel passage and ventilating shaft 5 from the top of ventilating shaft 5 discharge to outdoor. In the specific ventilation process, the ambient temperature in the traffic and slag channel area 18 and the working area 19 can be further controlled to be not higher than 28 ℃; the specific control means can be, for example, to control the temperature by adjusting the airflow rate inside the tunnel by controlling the operating conditions of the booster fan 9, or to control the cooling power of the corresponding cooling devices and the like disposed in the traffic and slag discharge passage area 18 and the operating area 19.
The utility model discloses can be applied to respectively in drilling and blasting method construction and TBM method construction, following concrete example condition with two kinds of construction methods respectively exemplifies:
example 1
Referring to attached drawings 1 and 5, the utility model discloses technical scheme's schematic diagram is adopted for under the drilling and blasting method construction state.
Assume the following tunnel construction example:
the total length of a tunnel is 30000 m.
The average tunnel elevation is 3500m, the atmospheric pressure is 500mm Hg, the annual average air temperature is 6.5 ℃, and the July average air temperature is 14.6 ℃.
The tunnel main body is divided into 8 sections, and 16 working faces are constructed, wherein the longest section is 4500 m; wherein the branch hole 7 plus the tunnel body in a certain section has the longest length of 7000 m.
Two main tunnels are arranged in the tunnel main body, namely a first main tunnel 1 and a second main tunnel 2, and the main tunnels are tunneled in parallel with a parallel pilot tunnel 3. The main tunnel has a diameter of 10m, a circumference of 31.4m and a cross-sectional area of 80m24500m Tunnel surface area 14X 104m2。
One parallel pilot tunnel 3 is arranged between two main tunnels, the diameter is 7.5m, the perimeter is 23.55m, and the sectional area is 45m24500m parallel pilot tunnel surface area 10.6X 104m2。
The distance between each connection hole 4 between the main tunnel and the parallel pilot tunnel 3 along the tunneling direction of the tunnel is set according to 500 m; in addition, only the connection holes 4 closest to the tunnel faces 11 at the two ends of the first main tunnel 1 are reserved in the connection holes 4 arranged between the first main tunnel 1 and the parallel pilot tunnels 3 to be communicated, and the other connection holes 4 are closed; only the communication between the communication holes 4 closest to the tunnel faces 11 at the two ends of the second main tunnel 2 and the communication holes 4 positioned in the middle is reserved in the communication holes 4 arranged between the second main tunnel 2 and the parallel pilot tunnels 3, and the other communication holes 4 are closed; in particular, as shown in fig. 1, a closed communication hole 41 is marked 41.
The branch hole 7 has a width of 8m, a circumference of 30m and a cross-sectional area of 60m2(ii) a The branch holes 7 adopt an arch hole structure.
The construction environment temperature designed in the tunnel is 28 ℃, and the initial rock temperature for tunnel excavation is 85 ℃.
The main tunnel is lined with concrete, and the thickness of the main tunnel is considered as 500 mm; sand and stone are filled between the concrete lining and the rock, and the filling thickness is considered according to 300 mm; the thickness of the rock from the rock surface to the stable temperature is considered according to 2000 mm; the main tunnel concrete lining polyurethane rigid foam thermal insulation material is used as a thermal insulation structure, and the thickness of the main tunnel concrete lining polyurethane rigid foam thermal insulation material is considered according to 150 mm.
Concrete lining thermal conductivity: 1.0Kcal/m2.h.℃；
Gneiss heat conductivity coefficient: 3.0Kcal/m2.h.℃；
Sand-stone filling heat conductivity coefficient: 0.5Kcal/m2.h.℃；
The heat conductivity coefficient of the polyurethane rigid foam is as follows: 0.026W/m.K ═ 0.03Kcal/m2.h.℃；
Calculating the heat transfer quantity:
the main tunnel generates heat:
calculating to obtain: the heat transfer coefficient K is 0.146Kcal/m2.h.℃；
4500m section main tunnel heat up: 117 × 104Kcal/h；
The parallel pilot tunnel 3 generates heat:
the parallel pilot tunnel 3 is lined with concrete, the thickness of the concrete is considered according to 500mm, sand and stone are filled between the concrete lining and the rock, and the filling thickness is considered according to 300 mm; the thickness of the rock from the rock surface to the stable temperature is considered according to 2000 mm; but does not line with a heat insulation material, namely, a heat insulation structure is not arranged in the parallel guide hole 3;
calculating to obtain: the heat transfer coefficient K is 0.53Kcal/m2.h.℃；
4500m parallel tunnel 3 heated: 320 x 104Kcal/h；
The working area 19 generates heat:
assuming that the length of the tunnel segment corresponding to the working area 19 is 150m, the rock is exposed;
calculating to obtain: the heat transfer coefficient K is 1.3cal/m2.h.℃；
The working area 19 corresponding to the main tunnel generates heat: 35X 104Kcal/h；
The working area 19 corresponding to the parallel pilot hole 3 generates heat: 26X 104Kcal/h；
Total heat generation amount of the working area 19 of the entire tunnel: 192 x 104Kcal/h；
And (3) ventilation scheme:
as shown in fig. 1, a ventilation shaft 5 is arranged at a position where the branch tunnel 7 corresponds to the second main tunnel 2, the diameter of the ventilation shaft 5 is the same as the width of the branch tunnel 7, and the height of the ventilation shaft 5 is not lower than 1/50 of the total length of the branch tunnel 7 plus the parallel pilot tunnel 3, i.e. not lower than 7000 m/50-140 m; the following calculations are considered for the ventilation shaft 5 at a height of 140 m. The utility model discloses in to each regional division in the tunnel as shown in figure 5, concrete is: the traffic and slag tapping passage area 18 is composed of the first main tunnel 1, the corresponding communicating connection hole 4 and a part of hole sections for communicating with the working area 9, as shown by the shaded area inclined to the right in the attached figure 5, and the traffic and slag tapping passage area 18 can realize the traffic of entering and exiting each tunnel face 11 in the traffic and slag tapping passage area. The working areas 19 are formed to correspond to respective areas near each of the tunnel faces 11, as indicated by hatched areas inclined to the left in fig. 5, and each of the working areas 19 is in the form of a blind hole structure. The non-person passing area 20 is composed of the parallel pilot tunnel 3 and the portion of the second main tunnel 2 located near the tunnel faces 11 and located between the communicating connecting holes 4, and the connecting holes 4 communicating between the parallel pilot tunnel 3 and the second main tunnel 2, as shown by the shaded area of the grid in fig. 5. By the above-described arrangement, a natural draft airflow 16 can be created within the tunnel as shown by the arrows in fig. 1: outdoor air enters from the branch hole 7, flows through the first main tunnel 1, the communication hole 4, the parallel pilot hole 3, the second main tunnel 2 and the ventilation shaft 5, and is finally discharged to the outdoor through the ventilation shaft 5.
The summer outdoor ventilation temperature is considered as 18 ℃.
The natural air inlet speed of the branch tunnel 7 is considered according to 3m/s, and the heating of the branch tunnel 7 is not considered temporarily.
Air intake: 64.8X 104m3/h；
The temperature of the outdoor air after passing through the first main tunnel 1 increases as:
18+117×104/0.241×64.8×104×1.2×(500/760)＝27.5℃；
air temperature at the inlet of the ventilation shaft 5:
the total heat is the heat productivity of the tunnel body between the tail end of the first main tunnel 1 and the inlet of the ventilation shaft 5:
117×104Kcal/h+320×104Kcal/h+35×104Kcal/h+26×104Kcal/h＝498×104Kcal/h
the inlet air temperature of the ventilation shaft 5 rises as follows:
27.5+498×104/0.241×64.8×104×1.2×(500/760)＝68℃；
the natural ventilation air pressure formed by hot pressing of the ventilation shaft 5:
0.186×(500/760)×9.8×140＝168Pa；
64.8×104m3the wind pressure required by the ventilation volume is about: 150 Pa;
as can be seen from the above calculation, the natural ventilation wind pressure formed by the heat inside the tunnel and the parallel pilot tunnel 3, etc. in this embodiment can satisfy the requirement of the natural ventilation wind volume.
And (3) cooling scheme:
through the ventilation mode treatment, the temperature in the first main tunnel 1 is already reduced to be below 28 ℃, and the first main tunnel 1 does not need to be subjected to additional temperature reduction treatment.
Working area 19 total heating value 192 × 104Kcal/h；
An evaporative condensing air conditioner 8 is adopted to cool a working area 19, and an outdoor unit 13 of the evaporative condensing air conditioner 8 is arranged in a non-personnel passing area 20; because of the requirement of no personnel passing in the non-personnel passing area 20, the heat and the water vapor generated by the outdoor unit 13 can be taken out to the outside along with the natural ventilation airflow 16, and meanwhile, the heat and the water vapor cannot cause damage to constructors.
The evaporative condensing air conditioner 8 has extremely high energy efficiency ratio and eliminates 192 multiplied by 104Kcal/h heat, only about 450 KW.
The booster fan 9 is provided with:
the outlet of the ventilation shaft 5 can be further provided with 64.8 multiplied by 104m3One booster fan 9 with the air volume of 150Pa is used for supplementing and standby natural ventilation.
The power consumption of the fan is as follows: 50 KW;
working area 19 is ventilated:
the ventilation of the working area 19 is realized by using the mechanical air exhausting mechanism 10, that is, the mechanical air exhausting mechanism 10 is arranged at the position of the corresponding working area 19, and the air exhausted by the mechanical air exhausting mechanism 10 is exhausted into the corresponding non-personnel passing area 20, and simultaneously, because the mechanical air exhausting mechanism 10 exhausts the air in the working area 19, the air flow naturally flowing into the working area 19 from the traffic and slag discharging passage area 18 is correspondingly generated.
According to the scheme, the total power consumption of ventilation and cooling in each subsection construction of the tunnel in the embodiment is about 500 KW. The tunnel is divided into 8 sections in total, and the total power consumption of the construction aeration cooling is about 4000 KW.
Example 2
Refer to fig. 2 and fig. 6, for adopting the utility model discloses technical scheme's schematic diagram under the TBM method construction state.
Assume the following tunnel construction example:
a certain tunnel length is 30000 m.
The average tunnel elevation is 3500m, the atmospheric pressure is 500mm Hg, the annual average air temperature is 6.5 ℃, and the July average air temperature is 14.6 ℃.
And (3) TBM construction, wherein the main tunnel and the parallel pilot tunnel are divided into 2 sections, and 2 working surfaces are constructed. The single head of the tunneling machine is 15000m long.
The main tunnels are provided with two main tunnels which are a first main tunnel 1 and a second main tunnel respectivelyAnd a main tunnel and the parallel pilot tunnel 3 are tunneled in parallel. The main tunnel has a diameter of 10m, a circumference of 31.4m and a cross-sectional area of 80m2(ii) a 15000m Tunnel surface area 47X 104m2。
One parallel pilot tunnel 3 is arranged between two main tunnels, the diameter is 7.5m, the perimeter is 23.55m, and the sectional area is 45m2(ii) a 15000m parallel pilot tunnel surface area 35X 104m2。
The connection holes 4 between the main tunnel and the parallel pilot tunnel 3 are arranged at intervals of 500m along the tunneling direction of the tunnel; and the communication holes 4 close to the tunnel face 11 are kept in an open state, and the other communication holes 4 are all closed.
The construction environment temperature designed in the tunnel is 28 ℃, and the initial rock temperature for tunnel excavation is 85 ℃.
Installing concrete segments on the main tunnel, wherein the thickness of the concrete segments is considered according to 500 mm; sand and stone are filled between the concrete pipe piece and the rock, and the filling thickness is considered according to 300 mm; the rock is considered according to the gneiss, the thickness from the rock surface to the rock with stable temperature is considered according to 2000mm, the main tunnel concrete lining polyurethane hard foam thermal insulation material is used as a thermal insulation structure, and the thickness is considered according to 150 mm.
Concrete segment thermal conductivity: 1.0Kcal/m2.h.℃；
Gneiss heat conductivity coefficient: 3.0Kcal/m2.h.℃；
Sand-stone filling heat conductivity coefficient: 0.5Kcal/m2.h.℃；
The heat conductivity coefficient of the polyurethane rigid foam is as follows: 0.026W/m.K ═ 0.03Kcal/m2.h.℃；
Calculating the heat transfer quantity:
the main tunnel generates heat:
calculating to obtain: the heat transfer coefficient K is 0.146Kcal/m2.h.℃；
The 15000m long main tunnel generates heat: 390X 104Kcal/h；
The parallel pilot tunnel 3 generates heat:
mounting a concrete segment in the parallel pilot tunnel 3, wherein the thickness of the concrete segment is considered according to 500 mm; sand and stone are filled between the concrete pipe piece and the rock, and the filling thickness is considered according to 300 mm; the thickness of the rock from the rock surface to the stable temperature is considered according to 2000 mm; the parallel guide holes 3 are not lined with heat insulation materials, namely, heat insulation structures are not arranged;
calculating to obtain: the heat transfer coefficient K is 0.53Kcal/m2.h.℃
15000m parallel tunnel 3 generates heat: 807X 104Kcal/h, wherein the average temperature inside the parallel pilot tunnel is calculated according to 42 ℃.
The working area 19 generates heat:
assuming that the length of the tunnel segment corresponding to the working area 19 is 60m, the rock is exposed;
calculating to obtain: the heat transfer coefficient K is 1.3cal/m2.h.℃；
The working area 19 corresponding to the main tunnel generates heat: 14X 104Kcal/h；
The working area 19 corresponding to the parallel pilot hole 3 generates heat: 10.4X 104Kcal/h；
And (3) ventilation scheme:
the TBM construction is carried out according to a double-advancing type tunneling mode, and the tunnel is divided into 2 sections for construction, wherein each section is 15000m long.
A ventilation shaft 5 is arranged at the position of 2000m close to the tunneling starting end of the parallel pilot tunnel 3, the diameter of the ventilation shaft 5 is the same as the width of the parallel pilot tunnel 3, the height of the ventilation shaft 5 is not less than 1/35 of the total length of the parallel pilot tunnel 3, and the ventilation shaft 5 is calculated according to the height of 450 m. The utility model discloses in to each regional division in the tunnel as shown in figure 6, concrete is: the traffic and slag tapping passage area 18 is composed of a first main tunnel 1, a second main tunnel 2 and a corresponding communicating connection hole 4, as shown by a shadow area inclined to the right in the attached figure 6, and the traffic and slag tapping passage area 18 can realize the traffic of entering and exiting each tunnel face 11 in the traffic and slag tapping passage area. The working areas 19 are formed to correspond to respective areas near each of the tunnel faces 11, as indicated by hatched areas inclined to the left in fig. 6, and each of the working areas 19 is in the form of a blind hole structure. The non-personnel passing area 20 is composed of a part of the hole section of the parallel pilot tunnel 3, specifically, the hole section between the connection hole 4 close to the tunnel face 11 and the ventilation shaft 5 in the parallel pilot tunnel 3, as shown in the shaded area of the grid in fig. 6. Through the above arrangement, a natural ventilation air flow 16 is correspondingly formed in the tunnel as shown by the arrow in fig. 2: outdoor air enters from corresponding ports 6 of the first main tunnel 1 and the second main tunnel 2 respectively, flows through the first main tunnel 1 and the second main tunnel 2 respectively, then enters the parallel pilot tunnels 3 through corresponding connection holes 4 respectively, and finally is discharged to the outdoor through a ventilation shaft 5.
The summer outdoor ventilation temperature is considered as 18 ℃.
The natural air inlet speed of the main tunnel is considered according to 2 m/s.
The air intake of the single main tunnel is as follows: 57.2X 104m3H, total intake: 114.4X 104m3/h；
The temperature rise of the outdoor air after passing through the main tunnel is as follows:
18+390×104/0.241×57.2×104×1.2×(500/760)＝54℃
because the tunnel with the temperature of 54 ℃ higher than 28 ℃ is designed as the construction environment temperature, in order to ensure that the construction environment temperature of constructors is not higher than 28 ℃, corresponding cooling equipment can be further added in the main tunnel to reduce the temperature of the air in the main tunnel, so that the temperature of outdoor air discharged into the parallel pilot tunnel 3 after passing through the main tunnel is not higher than 28 ℃; if a water jacket type cooling device is adopted for cooling.
After the cooling equipment is arranged, the temperature of outdoor air discharged to the parallel pilot tunnel 3 after passing through the main tunnel is controlled to be not higher than 28 ℃; the heat to be removed by the corresponding cooling device in the corresponding single main tunnel is: 240X 104Kcal/h, estimated power consumption about 1500 KW; the total heat to be removed by the two main tunnels is: 480X 104Kcal/h; namely, the installed cooling equipment needs to have cooling power for eliminating the corresponding heat.
Heat generation of the parallel pilot tunnel 3 from the end of the main tunnel to the entrance of the bottom end of the ventilation shaft 5: 845.4X 104Kcal/h；
The inlet air temperature at the bottom end of the ventilation shaft 5 rises as follows:
28+841.4×104/0.241×114.4×104×1.2×(500/760)＝66℃；
natural ventilation wind pressure formed by hot pressing:
the ventilation shaft 5 is considered as 450m high;
0.184×(500/760)×9.8×450＝533Pa；
114.4×104m3the wind pressure required by the ventilation volume is about: 1100 Pa;
therefore, in the embodiment, the natural ventilation air pressure formed by the heat inside the tunnel and the heat of the parallel pilot tunnel 3 and the like cannot meet the requirement of the corresponding natural ventilation air volume, and at the moment, the booster fan 9 can be further additionally arranged, and the booster fan 9 is arranged at the outlet of the ventilation shaft 5.
The parameters of the booster fan 9 are: 120 x 104m3H, 600Pa and 400KW of power consumption.
The tunnel is constructed in 2 sections in total, so 2 booster fans 9 are needed to be arranged.
Cooling scheme of working area 19:
working region 19 generates 38.4 x 10 heat4Kcal/h。
An evaporative condensing air conditioner 8 is adopted to cool a working area 19, and an outdoor unit 13 of the evaporative condensing air conditioner 8 is arranged in a non-personnel passing area 20; because of the requirement of no personnel passing in the non-personnel passing area 20, the heat and the water vapor generated by the outdoor unit 13 can be taken out to the outside along with the natural ventilation airflow 16, and meanwhile, the heat and the water vapor cannot cause damage to constructors.
The evaporative condensing air conditioner has extremely high energy efficiency ratio and eliminates 38.4 multiplied by 104Kcal/h heat, only about 80 KW.
Working area 19 is ventilated:
the ventilation of the working area 19 is realized by using the mechanical air exhausting mechanism 10, that is, the mechanical air exhausting mechanism 10 is arranged at the position of the corresponding working area 19, and the air exhausted by the mechanical air exhausting mechanism 10 is exhausted into the corresponding non-personnel passing area 20, and simultaneously, because the mechanical air exhausting mechanism 10 exhausts the air in the working area 19, the air flow naturally flowing into the working area 19 from the traffic and slag discharging passage area 18 is correspondingly generated.
In the embodiment, the total ventilation and cooling power consumption of each segment of TBM construction of the tunnel is about 1980 KW. The tunnel TBM construction is divided into 2 sections, and the total power consumption of the construction aeration cooling is about 3960 KW.
Claims (8)
1. A hot pressing formula tunnel ventilation system for high altitude high ground temperature long tunnel, its characterized in that: the tunnel comprises a tunnel main body and a ventilation shaft (5), wherein the ventilation shaft (5) is of a vertical shaft structure or an inclined shaft structure, and the tunnel main body comprises a traffic and slag discharging passage area (18), a working area (19) and a non-personnel passing area (20); the working area (19) is located near the tunnel face (11); the traffic and slag discharge passage area (18) is communicated with the working area (19); the non-personnel passing area (20) is communicated with the traffic and slag discharging passage area (18); the lower end of the ventilation shaft (5) is communicated with a non-personnel passing area (20), and the upper end of the ventilation shaft (5) is communicated with the outside; a ventilation flow channel is formed after a traffic and slag discharge passage area (18), a non-personnel passage area (20) and a ventilation shaft (5) are communicated in sequence; no heat insulation structure is arranged in the non-personnel passing area (20).
2. The thermal compression tunnel ventilation system for high-altitude high-geothermal long tunnels according to claim 1, wherein: the non-personnel passing area (20) is communicated with a position close to the tunnel face (11) in the traffic and slag discharge passage area (18); the lower end of the ventilation shaft (5) is communicated with a position far away from a traffic and slag discharging passage area (18) in a non-personnel passing area (20).
3. The thermal compression tunnel ventilation system for high-altitude high-geothermal long tunnels according to claim 1, wherein: arranging a concrete lining and heat insulation structure in the traffic and slag tapping channel area (18); when the strength of the corresponding tunnel rock wall in the non-personnel passing area (20) meets the construction safety requirement, no concrete lining is arranged in the non-personnel passing area (20).
4. The thermal compression tunnel ventilation system for high-altitude high-geothermal long tunnels according to claim 1, wherein: an evaporative condensing air conditioner (8) is further arranged in the tunnel main body, the evaporative condensing air conditioner (8) comprises an indoor unit (12) and an outdoor unit (13) which are connected, the indoor unit (12) is arranged in a working area (19), and the outdoor unit (13) is arranged in a non-personnel passing area (20).
5. The thermal compression tunnel ventilation system for high-altitude high-geothermal long tunnels according to claim 1, wherein: a booster fan (9) is arranged at the outlet of the ventilation shaft (5).
6. The thermal compression tunnel ventilation system for high-altitude high-geothermal long tunnels according to claim 1, wherein: the mechanical air exhaust mechanism (10) is arranged corresponding to each working area (19), the mechanical air exhaust mechanism (10) comprises a drainage fan (14) and an air supply pipeline (15), an air inlet port of the air supply pipeline (15) is arranged in the working area (19) and close to the corresponding palm surface (11), an air outlet port of the air supply pipeline (15) is arranged in a non-personnel passing area (20), and the drainage fan (14) is arranged in the air supply pipeline (15).
7. The thermal compression tunnel ventilation system for a high-altitude high-geothermal long tunnel according to any one of claims 1 to 6, wherein: the tunnel main body is a tunnel structure corresponding to drilling and blasting construction, and comprises a first main tunnel (1), a second main tunnel (2), parallel pilot holes (3), connection holes (4) and branch holes (7), wherein the first main tunnel (1), the second main tunnel (2) and the parallel pilot holes (3) are arranged in parallel, the parallel pilot holes (3) are positioned between the first main tunnel (1) and the second main tunnel (2), the connection holes (4) are arranged between the first main tunnel (1) and the parallel pilot holes (3) at intervals, and the connection holes (4) are arranged between the second main tunnel (2) and the parallel pilot holes (3) at intervals; the middle part of the first main tunnel (1) is communicated with one end of a branch hole (7), and the other end of the branch hole (7) is communicated with the outside; the lower end of the ventilation shaft (5) is communicated with the middle part of the second main tunnel (2); only corresponding connection holes (4) closest to the tunnel faces (11) at the two ends of the first main tunnel (1) are reserved in the connection holes (4) arranged between the first main tunnel (1) and the parallel pilot holes (3) to be communicated, and the other connection holes (4) are closed; only corresponding connection holes (4) closest to tunnel faces (11) at two ends of the second main tunnel (2) are kept in connection with corresponding connection holes (4) in the middle closest to the ventilation shaft (5) in each connection hole (4) arranged between the second main tunnel (2) and the parallel pilot tunnel (3), and the other connection holes (4) are closed; the height of the ventilation shaft (5) is not lower than 1/50 of the sum of the lengths of the parallel pilot tunnel (3) and the branch tunnel (7) of the tunnel body in the corresponding construction section.
8. The thermal compression tunnel ventilation system for a high-altitude high-geothermal long tunnel according to any one of claims 1 to 6, wherein: the tunnel main body is a tunnel structure corresponding to TBM construction, and comprises a first main tunnel (1), a second main tunnel (2), parallel pilot holes (3) and contact holes (4), wherein the first main tunnel (1), the second main tunnel (2) and the parallel pilot holes (3) are arranged in parallel, the parallel pilot holes (3) are positioned between the first main tunnel (1) and the second main tunnel (2), the contact holes (4) are arranged between the first main tunnel (1) and the parallel pilot holes (3) at intervals, and the contact holes (4) are arranged between the second main tunnel (2) and the parallel pilot holes (3) at intervals; the tunneling starting ends of the parallel pilot tunnel (3), the first main tunnel (1) and the second main tunnel (2) are all located at the same end, a plugging body (17) is arranged at the tunneling starting end of the parallel pilot tunnel (3) for plugging, and the first main tunnel (1) and the second main tunnel (2) are communicated with the outside through the tunneling starting ends; the lower end of the ventilation shaft (5) is communicated with a part of the parallel pilot tunnel (3) close to the tunneling starting end; only the connection hole (4) closest to the tunnel face (11) of the first main tunnel (1) is kept in each connection hole (4) arranged between the first main tunnel (1) and the parallel pilot tunnel (3) to be communicated, and the other connection holes (4) are closed; only the connection hole (4) closest to the tunnel face (11) of the second main tunnel (2) is kept in each connection hole (4) arranged between the second main tunnel (2) and the parallel pilot tunnel (3) to be communicated, and the other connection holes (4) are closed; the height of the ventilation shaft (5) is not lower than 1/35 of the length of the parallel pilot tunnel (3) of the tunnel main body in the corresponding construction section.
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| CN201921055270.7U CN210178400U (en) | 2019-07-08 | 2019-07-08 | Hot-pressing type tunnel ventilation system for high-altitude high-ground-temperature long tunnel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110185485A (en) * | 2019-07-08 | 2019-08-30 | 中国电建集团成都勘测设计研究院有限公司 | Heat pressing type Tunnel Ventilation System for High aititude High-geotemperature long tunnel |
| CN112944519A (en) * | 2021-03-15 | 2021-06-11 | 中信和业投资有限公司 | System for effectively controlling chimney effect of elevator shaft of super high-rise building |
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2019
- 2019-07-08 CN CN201921055270.7U patent/CN210178400U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110185485A (en) * | 2019-07-08 | 2019-08-30 | 中国电建集团成都勘测设计研究院有限公司 | Heat pressing type Tunnel Ventilation System for High aititude High-geotemperature long tunnel |
| CN110185485B (en) * | 2019-07-08 | 2023-12-05 | 中国电建集团成都勘测设计研究院有限公司 | Hot-pressing type tunnel ventilation system for high-altitude high-ground-temperature long tunnel |
| CN112944519A (en) * | 2021-03-15 | 2021-06-11 | 中信和业投资有限公司 | System for effectively controlling chimney effect of elevator shaft of super high-rise building |
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