CN113818901A - Multifunctional transverse channel structure for tunnel and construction method - Google Patents
Multifunctional transverse channel structure for tunnel and construction method Download PDFInfo
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- 238000010276 construction Methods 0.000 title claims abstract description 87
- 239000000779 smoke Substances 0.000 claims abstract description 91
- 238000007599 discharging Methods 0.000 claims abstract description 54
- 238000002955 isolation Methods 0.000 claims description 43
- 230000007704 transition Effects 0.000 claims description 32
- 239000003517 fume Substances 0.000 claims description 29
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 18
- 239000003546 flue gas Substances 0.000 claims description 18
- 230000005641 tunneling Effects 0.000 claims description 9
- 229910052602 gypsum Inorganic materials 0.000 claims description 5
- 239000010440 gypsum Substances 0.000 claims description 5
- 238000009415 formwork Methods 0.000 claims description 3
- 230000008859 change Effects 0.000 abstract description 15
- 238000005422 blasting Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 8
- 206010000369 Accident Diseases 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 6
- 238000009412 basement excavation Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 239000002341 toxic gas Substances 0.000 description 2
- 241001122767 Theaceae Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
-
- 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
- E21F1/003—Ventilation of traffic tunnels
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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
- E21F11/00—Rescue devices or other safety devices, e.g. safety chambers or escape ways
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Abstract
The invention discloses a multifunctional transverse channel structure for a tunnel and a construction method, wherein the multifunctional transverse channel structure for the tunnel comprises a left line tunnel, a right line tunnel, a smoke exhaust transverse hole, a fan and a control chamber, wherein the left line tunnel and the right line tunnel are used for vehicle passing and are parallel to each other; the smoke-discharging cross tunnel is a horizontally-arranged constant-section structure, so that the construction of a straddle-type structure and a structure gradual change section on the traditional smoke-discharging cross tunnel is avoided, the construction length of the smoke-discharging cross tunnel is shortened, meanwhile, the horizontally-arranged smoke-discharging cross tunnel is more straight, the construction of a longitudinal slope is avoided, and the construction scale and the construction difficulty are reduced; the influence of construction blasting vibration on the lower constructed tunnel is also avoided; in addition, the invention also has the escape function, thereby greatly reducing the disaster risk during the construction and operation of the tunnel, realizing the function diversification of the transverse passage and ensuring the safety of personnel and the tunnel structure.
Description
Technical Field
The invention relates to the technical field of highway tunnel construction, in particular to a multifunctional transverse channel structure for a tunnel and a construction method.
Background
In recent decades, the economy of China has been rapidly developed, the urbanization process is gradually accelerated, and in order to reduce the traffic pressure brought by the growth of regional population, the development and the use of underground space are just as if the fire is tea. The scale of tunnel construction increases year by year, however, with the continuous increase of the number and the length of the tunnels, the frequency of the fire accidents of the tunnels is also increased. The tunnel belongs to a long and narrow space structure, is closed compared with other buildings, once a fire accident occurs, high-temperature smoke generated by combustion is difficult to effectively discharge in time, and a high-temperature area up to 1000 ℃ can be formed in a short time; meanwhile, the combustion of combustible materials consumes a large amount of oxygen, so that the oxygen content in the tunnel is reduced, and the fuel is difficult to combust completely, so that a large amount of toxic gas such as CO is generated, people in the tunnel are suffocated, poisoned and even dead, and the life of the people and the tunnel structure are seriously threatened.
Through setting up the through hole of discharging fume, can reduce the emergence of above-mentioned calamity phenomenon with flue gas discharge lane space in the tunnel, guarantee personnel and tunnel structure safety. At present, the traditional tunnel smoke discharge transverse through hole air duct section mainly adopts two modes of a fixed section and a gradual-change section. However, the smoke exhaust rate of the fixed section is low, the function of the fixed section cannot be exerted to the maximum extent, and toxic gas cannot be exhausted out of the traffic lane space as soon as possible; although the ventilation efficiency of the gradual change section is high, the construction difficulty is higher, the construction period is long and the construction cost is high due to the special section form. In addition, the traditional horizontal tunnel function singleness of discharging fume only as the tunnel use of discharging fume, control the hole and often adopt the horizontal tunnel of discharging fume of separation about moreover, the cost is high, the excavation blasting influences the main tunnel greatly, has the extravagant phenomenon of construction resources.
The construction process of the traditional tunnel is as follows: the left tunnel and the right tunnel are constructed firstly, and the smoke exhaust system is constructed after the left tunnel and the right tunnel are constructed. It can be seen that the traditional construction method can only be used for one-way construction of a left tunnel and a right tunnel, which results in long construction period and high construction cost.
Disclosure of Invention
The invention provides a multifunctional transverse channel structure for a tunnel and a construction method, aiming at the technical problems of long construction period and high construction difficulty of smoke exhaust through holes of the traditional tunnel.
The technical scheme adopted by the invention is as follows: multifunctional transverse channel structure for tunnel, including being used for the current and left line tunnel and the right line tunnel that are parallel to each other of vehicle for discharge left line tunnel and right line tunnel in the flue gas the crosshole of discharging fume and arrange fan and control room in the crosshole of discharging fume, the crosshole of discharging fume includes:
the connecting section is connected between the left line tunnel and the right line tunnel and is communicated with the left line tunnel and the right line tunnel; the top of the connecting section is provided with a discharge flue for discharging smoke in the right tunnel, the control room is arranged on one side of the lower part of the connecting section, and the other side of the lower part of the connecting section is provided with a first escape channel;
the transition section is communicated with the left tunnel and the first escape channel, and the fan is arranged in the transition section;
one end of the smoke exhaust section is communicated with the transition section, and the other end of the smoke exhaust section extends to the outside of the tunnel;
the smoke exhaust cross hole is of a horizontally arranged equal-section structure.
The flue gas in left side line tunnel and the right side line tunnel is through the fan of the cross hole of discharging fume, with the flue gas discharge to the tunnel outside, keeps air quality and visibility in the tunnel, is favorable to guaranteeing tunnel driving safety. Compared with the traditional left-side tunnel and the right-side tunnel which adopt a separated smoke discharge cross tunnel mode, the smoke discharge cross tunnel is of a horizontally arranged constant-section structure, the construction of an upper span type structure and a structure gradual change section of the traditional smoke discharge cross tunnel is avoided, the construction length of the smoke discharge cross tunnel is shortened, meanwhile, the horizontally arranged smoke discharge cross tunnel is more straight, longitudinal slope construction is avoided, and the construction scale and the construction difficulty are reduced; and the influence of construction blasting vibration on the tunnel under which construction is finished is also avoided. The control room is arranged in the connecting section, so that the control room is more stable and safer, and later maintenance and maintenance are facilitated. In addition, the first escape passage is arranged in the connecting section and used for evacuating people in the tunnel, and when a fire accident happens in any one of the left tunnel and the right tunnel, people can be transferred from the tunnel with the fire accident to be evacuated into the other safe tunnel, so that the safety of the people in the tunnel is ensured. Arrange the flue gas in the discharge flue at linkage segment top is used for discharging the right side tunnel, makes left side tunnel and right side tunnel discharge fume alone, does not influence each other during discharging fume to stop the streaming of flue gas, also improved smoke exhaust efficiency.
Furthermore, a first isolation door is arranged at one end of the first escape passage close to the left tunnel, and a second isolation door is arranged at one end of the first escape passage close to the right tunnel. When a fire disaster happens to the right tunnel, the first isolation door and the second isolation door are opened, and people in the right tunnel can get to the left tunnel through the first escape passage to avoid danger; when the left tunnel is in fire, people in the right tunnel can also go to the right hole to avoid danger; and closing the first isolation door and the second isolation door after the personnel are transferred, thereby effectively stopping the series flow of the flue gas and ensuring the life safety of the personnel in the tunnel.
Furthermore, an upper isolation door is arranged at the end part of the discharge flue where the transition section is located, and a lower isolation door is arranged at the lower part of the upper isolation door. The upper isolating door is used for discharging the smoke in the right tunnel when opened; be used for discharging the flue gas in the left side tunnel when isolating gate opens down, make left side tunnel and right side tunnel discharge fume alone, each other does not influence, can effectively stop the streaming of flue gas on the one hand, guarantees personnel's life safety in the tunnel, and on the other hand can improve the efficiency of discharging fume.
Furthermore, a conical guide plate is arranged at one end of the transition section connected with the smoke exhaust section, and the cross section area of the guide plate is gradually reduced in the direction close to the smoke exhaust section. Traditional gradual change section need be with the design of the cross cut of discharging fume for striding formula structure on, has also changed the levelness and the trend of the cross cut of discharging fume promptly, causes the problem that the construction degree of difficulty is great, construction cycle is long, construction cost is high. The tapered guide plate is arranged at one end of the transition section connected with the smoke discharging section, the effect of gradual change of the air channel can be achieved, the smoke discharging efficiency is improved, the effect of the two is the same as the technical problem solved, but compared with the prior art, the guide plate does not change the trend and the levelness of the smoke discharging cross channel, the gradual change section is constructed without using an excavation mode, the construction difficulty is lower, the construction period is shorter, and the construction cost is lower.
Furthermore, the guide plate is a fireproof gypsum board, so that the cost is low, and a better fireproof and heat-insulation effect is achieved, thereby avoiding the influence of high temperature of smoke on the smoke discharge cross hole and the spread of fire.
Furthermore, the two fans are symmetrically arranged on two sides of the transition section, a second escape channel communicated with the first escape channel is arranged between the two fans, and the second escape channel extends to the outside of the tunnel along with the smoke exhaust section. The traditional fan also needs to be specially provided with a fan room, the smoke exhaust cross tunnel can be directly used as the fan room, and a second escape channel is arranged between the two groups of fans for escape rescue in emergency or as an overhaul channel of the smoke exhaust cross tunnel, so that various functions of the smoke exhaust cross tunnel can be realized, the maximum utilization is realized, and social resources are saved. When the left tunnel and the right tunnel are simultaneously in fire, the second escape passage is matched with the first escape passage to convey the personnel in the left tunnel and the right tunnel to the safe ground outside the tunnels through the smoke discharge cross holes.
Further, the top of the discharge flue is arc-shaped. The arc-shaped bearing capacity is stronger, the spanning capacity is larger, the construction is simpler, and the maintenance and repair costs are less.
Further, the horizontal hole of discharging fume is perpendicular with left side line tunnel, reduces the construction length of the horizontal hole of discharging fume, further reduces the construction degree of difficulty.
Furthermore, the fan is an axial flow fan, and has the advantages of high cost performance, high quality, low cost, long service life, low noise, compact structure, convenience in installation and the like.
The construction method is used for constructing the multifunctional transverse channel structure for the tunnel and comprises the following steps:
s1, constructing a smoke exhaust section of the smoke exhaust transverse hole from the direction vertical to the left tunnel according to the arrangement trend of the left tunnel, and performing primary support and secondary lining on the smoke exhaust section;
s2, continuously tunneling the smoke-exhaust transverse tunnel, constructing a transition section of the smoke-exhaust transverse tunnel, and performing primary support and secondary lining on the transition section;
s3, continuously tunneling the smoke-exhaust cross tunnel, constructing a connecting section of the smoke-exhaust cross tunnel, and performing primary support and secondary lining on the connecting section;
s4, constructing a left tunnel and a right tunnel in a two-way mode in the direction perpendicular to the smoke exhaust cross holes at the two ends of the connecting section; placing long formwork trolleys in the left tunnel and the right tunnel to continue tunneling;
s5, after the civil structure construction is finished, installing a first isolation door and a second isolation door in the connecting section, and installing an upper isolation door, a lower isolation door, a fan and a fireproof gypsum board in the transition section.
Because the multifunctional transverse channel is constructed, after the transverse channel is excavated, a working face can be additionally arranged to excavate the double-track tunnel, compared with the traditional construction method, the construction method has the advantages that the construction period is greatly shortened, and the construction efficiency is improved; meanwhile, convenience is brought to construction, and the construction difficulty is reduced.
The invention has the beneficial effects that:
1. the smoke-discharging cross tunnel is a horizontally-arranged constant-section structure, so that the construction of a straddle-type structure and a structure gradual change section on the traditional smoke-discharging cross tunnel is avoided, the construction length of the smoke-discharging cross tunnel is shortened, meanwhile, the horizontally-arranged smoke-discharging cross tunnel is more straight, the construction of a longitudinal slope is avoided, and the construction scale and the construction difficulty are reduced; and the influence of construction blasting vibration on the tunnel under which construction is finished is also avoided.
2. The left tunnel and the right tunnel can independently discharge smoke, and the smoke discharge does not affect each other, so that the series flow of the smoke is avoided, and the smoke discharge efficiency is improved.
3. The smoke-discharging cross tunnel not only can discharge smoke in the tunnel, but also has the function of escaping, thereby greatly reducing disaster risks during tunnel construction and operation, realizing the function diversification of the cross channel, and ensuring the safety of personnel and tunnel structures.
4. The guide plate of the invention can also achieve the effect of gradual change of the air duct on the premise of not changing the trend and the levelness of the smoke exhaust cross road, does not need to use an excavation mode to construct a gradual change section, improves the smoke exhaust efficiency, and has lower construction difficulty, shorter construction period and lower construction cost.
5. The smoke-discharging cross tunnel can be directly used as a fan room, and a second escape channel is arranged between two groups of fans for escape rescue in emergency situations or as an overhaul channel of the smoke-discharging cross tunnel, so that various functions of the smoke-discharging cross tunnel can be realized, the maximum utilization is realized, social resources are saved, and the second escape channel is matched with the first escape channel to convey personnel in the left tunnel and the right tunnel to the safe ground outside the tunnels through the smoke-discharging cross tunnel.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic longitudinal section of the smoke evacuation cross tunnel.
Fig. 3 is a schematic cross-sectional view of a connecting segment.
FIG. 4 is a schematic cross-sectional view of a transition section.
Fig. 5 is an operational usage flow chart.
Labeled as:
1. a left line tunnel; 2. a right-hand tunnel; 3. smoke discharging transverse holes;
31. a connecting section; 310. a discharge flue; 311. a first escape route; 312. a control room; 313. a first isolation gate; 314. a second isolation gate;
32. a transition section; 320. a fan; 321. an upper isolation gate; 322. a lower isolation door; 323. a baffle; 324. a second escape way;
33. and a smoke exhaust section.
Detailed Description
In the description of the present invention, it should be noted that the terms "front", "upper", "lower", "left", "right", "vertical", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The invention is further described below with reference to the accompanying drawings.
Example one
Referring to fig. 1, 2, 3 and 4, the multifunctional cross passage structure for tunnel of the present invention comprises a left tunnel 1 and a right tunnel 2 for vehicle passage and parallel to each other, a smoke evacuation cross tunnel 3 for exhausting smoke in the left tunnel and the right tunnel, and a fan 320 and a control room 312 arranged in the smoke evacuation cross tunnel, the smoke evacuation cross tunnel comprising a connection section 31, a transition section 32 and a smoke evacuation section 33; the connecting section 31 is connected between the left tunnel and the right tunnel and is communicated with the left tunnel and the right tunnel; the top of the connecting section is provided with a discharge flue 310 for discharging smoke in the right tunnel, the control room 312 is arranged at one side of the lower part of the connecting section, and the other side of the lower part of the connecting section is provided with a first escape passage 311; the transition section 32 is communicated with the left tunnel and the first escape passage, and the fan 320 is arranged in the transition section 32; one end of the smoke exhaust section 33 is communicated with the transition section 32, and the other end of the smoke exhaust section extends to the outside of the tunnel; the smoke discharge cross hole is of a horizontally arranged equal-section structure. The flue gas in left side line tunnel and the right side line tunnel is through the fan of the cross hole of discharging fume, with the flue gas discharge to the tunnel outside, keeps air quality and visibility in the tunnel, is favorable to guaranteeing tunnel driving safety. Compared with the traditional left-side tunnel and the right-side tunnel which adopt a separated smoke discharge cross tunnel mode, the smoke discharge cross tunnel is of a horizontally arranged constant-section structure, the construction of an upper span type structure and a structure gradual change section of the traditional smoke discharge cross tunnel is avoided, the construction length of the smoke discharge cross tunnel is shortened, meanwhile, the horizontally arranged smoke discharge cross tunnel is more straight, longitudinal slope construction is avoided, and the construction scale and the construction difficulty are reduced; and the influence of construction blasting vibration on the tunnel under which construction is finished is also avoided. The control room is arranged in the connecting section, so that the control room is more stable and safer, and later maintenance and maintenance are facilitated. In addition, the first escape passage is arranged in the connecting section and used for evacuating people in the tunnel, and when a fire accident happens in any one of the left tunnel and the right tunnel, people can be transferred from the tunnel with the fire accident to be evacuated into the other safe tunnel, so that the safety of the people in the tunnel is ensured. Arrange the flue gas in the discharge flue at linkage segment top is used for discharging the right side tunnel, makes left side tunnel and right side tunnel discharge fume alone, does not influence each other during discharging fume to stop the streaming of flue gas, also improved smoke exhaust efficiency.
Referring to fig. 1 and 2, in the present embodiment, a first isolation door 313 is provided at an end of the first escape route close to the left tunnel, and a second isolation door 314 is provided at an end of the first escape route close to the right tunnel. When a fire disaster happens to the right tunnel, the first isolation door and the second isolation door are opened, and people in the right tunnel can get to the left tunnel through the first escape passage to avoid danger; when the left tunnel is in fire, people in the right tunnel can also go to the right hole to avoid danger; and closing the first isolation door and the second isolation door after the personnel are transferred, thereby effectively stopping the series flow of the flue gas and ensuring the life safety of the personnel in the tunnel.
Referring to fig. 2, an upper isolation door 321 is disposed at an end of the discharge flue where the transition section is located, and a lower isolation door 322 is disposed at a lower portion of the upper isolation door. The upper isolating door is used for discharging the smoke in the right tunnel when opened; be used for discharging the flue gas in the left side tunnel when isolating gate opens down, make left side tunnel and right side tunnel discharge fume alone, each other does not influence, can effectively stop the streaming of flue gas on the one hand, guarantees personnel's life safety in the tunnel, and on the other hand can improve the efficiency of discharging fume.
Referring to fig. 1, in this embodiment, a tapered guide plate 323 is disposed at an end of the transition section connected to the smoke evacuation section, and the cross-sectional area of the guide plate is gradually reduced in a direction approaching the smoke evacuation section. Traditional gradual change section need be with the design of the cross cut of discharging fume for striding formula structure on, has also changed the levelness and the trend of the cross cut of discharging fume promptly, causes the problem that the construction degree of difficulty is great, construction cycle is long, construction cost is high. The tapered guide plate is arranged at one end of the transition section connected with the smoke discharging section, the effect of gradual change of the air channel can be achieved, the smoke discharging efficiency is improved, the effect of the two is the same as the technical problem solved, but compared with the prior art, the guide plate does not change the trend and the levelness of the smoke discharging cross channel, the gradual change section is constructed without using an excavation mode, the construction difficulty is lower, the construction period is shorter, and the construction cost is lower.
This embodiment guide plate 323 is the fire prevention gypsum board, with low costs, has better fire prevention heat insulation effect to can avoid the influence of flue gas high temperature to the cross cavity of discharging fume and stretching of intensity of a fire.
Referring to fig. 4, the number of the fans of the present embodiment is two, and the two fans are symmetrically arranged at two sides of the transition section, a second escape passage 324 communicated with the first escape passage is arranged between the two fans, and the second escape passage extends to the outside of the tunnel along with the smoke exhaust section. The traditional fan also needs to be specially provided with a fan room, the smoke exhaust cross tunnel can be directly used as the fan room, and a second escape channel is arranged between the two groups of fans for escape rescue in emergency or as an overhaul channel of the smoke exhaust cross tunnel, so that various functions of the smoke exhaust cross tunnel can be realized, the maximum utilization is realized, and social resources are saved. When the left tunnel and the right tunnel are simultaneously in fire, the second escape passage is matched with the first escape passage to convey the personnel in the left tunnel and the right tunnel to the safe ground outside the tunnels through the smoke discharge cross holes.
Referring to fig. 3, the top of the discharge flue of this embodiment is curved. The arc-shaped bearing capacity is stronger, the spanning capacity is larger, the construction is simpler, and the maintenance and repair costs are less.
Referring to fig. 1, the horizontal hole 3 of discharging fume of this embodiment is perpendicular with left line tunnel 1, reduces the construction length of the horizontal hole of discharging fume, further reduces the construction degree of difficulty.
The fan of this embodiment is axial fan preferably, has advantages such as sexual valence relative altitude, high quality low price, long service life, the noise is little, compact structure, simple to operate, and specific specification is selected according to the tunnel size.
The working principle is as follows: referring to fig. 5, when the tunnel normally operates, the upper isolation door and the lower isolation door are opened, the fan is closed, and foul air in the left tunnel and the right tunnel is discharged out of the tunnel through the smoke discharge cross hole by using a chimney effect. When a fire disaster happens to the left-line tunnel, the upper isolating door is closed, the lower isolating door is opened, the fan exhausts smoke in the left-line tunnel out of the tunnel through the smoke exhaust cross hole, the first isolating door and the second isolating door are opened simultaneously, people in the left-line tunnel are evacuated to the right-line tunnel through the first escape passage, and the first isolating door and the second isolating door are closed after the people are evacuated. When a fire disaster happens to the right tunnel, the lower isolating door is closed, the upper isolating door is opened, the fan exhausts the smoke in the right tunnel out of the tunnel through the smoke exhaust cross hole, the first isolating door and the second isolating door are opened simultaneously, the personnel in the right tunnel are evacuated to the left tunnel through the first escape passage, and the first isolating door and the second isolating door are closed after the personnel are evacuated. When an emergency occurs or a fire disaster occurs simultaneously in the left tunnel and the right tunnel, the upper isolation door and the lower isolation door are opened simultaneously, the fan is opened, and the fan discharges smoke in the left tunnel and the right tunnel out of the tunnels; meanwhile, the second escape passage and the first escape passage are opened, and people in the tunnel are evacuated to the safe ground outside the tunnel.
Example two
The construction method is used for constructing the multifunctional transverse channel structure for the tunnel in the first construction embodiment, and comprises the following steps of:
s1, constructing a smoke exhaust section of the smoke exhaust transverse hole from the direction vertical to the left tunnel according to the arrangement trend of the left tunnel, and performing primary support and secondary lining on the smoke exhaust section;
s2, continuously tunneling the smoke-exhaust transverse tunnel, constructing a transition section of the smoke-exhaust transverse tunnel, and performing primary support and secondary lining on the transition section;
s3, continuously tunneling the smoke-exhaust cross tunnel, constructing a connecting section of the smoke-exhaust cross tunnel, and performing primary support and secondary lining on the connecting section;
s4, constructing a left tunnel and a right tunnel in a two-way mode in the direction perpendicular to the smoke exhaust cross holes at the two ends of the connecting section; placing long formwork trolleys in the left tunnel and the right tunnel to continue tunneling;
s5, after the civil structure construction is finished, installing a first isolation door and a second isolation door in the connecting section, and installing an upper isolation door, a lower isolation door, a fan and a fireproof gypsum board in the transition section.
Because the multifunctional transverse channel is constructed, after the transverse channel is excavated, a working face can be additionally arranged to excavate the double-track tunnel, compared with the traditional construction method, the construction method has the advantages that the construction period is greatly shortened, and the construction efficiency is improved; meanwhile, convenience is brought to construction, and the construction difficulty is reduced.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. Multifunctional transverse channel structure for tunnel, including left side line tunnel (1) and right side line tunnel (2) that are used for the vehicle to pass and are parallel to each other for discharge in left side line tunnel and the right side line tunnel the cross tunnel (3) of discharging fume of flue gas with arrange fan (320) and control room (312) in the cross tunnel of discharging fume, its characterized in that, the cross tunnel of discharging fume includes:
the connecting section (31) is connected between the left line tunnel and the right line tunnel and is communicated with the left line tunnel and the right line tunnel; a discharge flue (310) for discharging smoke in the right tunnel is arranged at the top of the connecting section, a control room (312) is arranged at one side of the lower part of the connecting section, and a first escape channel (311) is arranged at the other side of the lower part of the connecting section;
the transition section (32) is communicated with the left tunnel and the first escape channel, and the fan (320) is arranged in the transition section (32);
one end of the smoke exhaust section (33) is communicated with the transition section (32), and the other end of the smoke exhaust section extends to the outside of the tunnel;
the smoke exhaust cross hole is of a horizontally arranged equal-section structure.
2. The multi-functional lateral passage structure for tunnels according to claim 1, wherein a first isolation door (313) is provided at one end of the first escape passage near the left tunnel, and a second isolation door (314) is provided at one end of the first escape passage near the right tunnel.
3. The multi-functional lateral channel structure for tunnel of claim 1, characterized in that the end of the discharge flue where the transition section is located is provided with an upper isolation door (321), and the lower part of the upper isolation door is provided with a lower isolation door (322).
4. The multi-functional cross passage structure for the tunnel according to claim 1, wherein a tapered guide plate (323) is provided at an end of the transition section connected to the smoke evacuation section, and a cross-sectional area of the guide plate is gradually reduced in a direction approaching the smoke evacuation section.
5. The multi-functional lateral channel structure for tunnel of claim 1, wherein the deflector (323) is a fire-proof plasterboard.
6. The multifunctional cross passage structure for the tunnel according to claim 5, wherein the number of the fans is two, and the fans are symmetrically arranged at two sides of the transition section, a second escape passage (324) communicated with the first escape passage is arranged between the two fans, and the second escape passage extends to the outside of the tunnel along with the smoke exhaust section.
7. The multi-functional cross passage structure for tunnels of claim 1, wherein the top of the discharge flue is arc-shaped.
8. The multifunctional cross-channel structure for the tunnel according to claim 1, characterized in that the smoke evacuation cross-hole (3) is perpendicular to the left-line tunnel (1).
9. A multifunctional transverse channel structure for a tunnel according to any one of claims 1 to 8, wherein the fan is an axial fan.
10. A construction method for constructing the multifunctional cross passage structure for the tunnel according to claim 9, comprising the steps of:
s1, constructing a smoke exhaust section of the smoke exhaust transverse hole from the direction vertical to the left tunnel according to the arrangement trend of the left tunnel, and performing primary support and secondary lining on the smoke exhaust section;
s2, continuously tunneling the smoke-exhaust transverse tunnel, constructing a transition section of the smoke-exhaust transverse tunnel, and performing primary support and secondary lining on the transition section;
s3, continuously tunneling the smoke-exhaust cross tunnel, constructing a connecting section of the smoke-exhaust cross tunnel, and performing primary support and secondary lining on the connecting section;
s4, constructing a left tunnel and a right tunnel in a two-way mode in the direction perpendicular to the smoke exhaust cross holes at the two ends of the connecting section; placing long formwork trolleys in the left tunnel and the right tunnel to continue tunneling;
s5, after the civil structure construction is finished, installing a first isolation door and a second isolation door in the connecting section, and installing an upper isolation door, a lower isolation door, a fan and a fireproof gypsum board in the transition section.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111254789.XA CN113818901A (en) | 2021-10-27 | 2021-10-27 | Multifunctional transverse channel structure for tunnel and construction method |
| ZA2021/10932A ZA202110932B (en) | 2021-10-27 | 2021-12-24 | Multifunctional transverse passage structure for tunnel and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111254789.XA CN113818901A (en) | 2021-10-27 | 2021-10-27 | Multifunctional transverse channel structure for tunnel and construction method |
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| CN113818901A true CN113818901A (en) | 2021-12-21 |
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| CN202111254789.XA Pending CN113818901A (en) | 2021-10-27 | 2021-10-27 | Multifunctional transverse channel structure for tunnel and construction method |
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| ZA202110932B (en) | 2022-03-30 |
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