CN114033463B - Heat preservation structure gap subsection positive accumulation temperature and negative accumulation temperature combined ventilation regulation and control method - Google Patents
Heat preservation structure gap subsection positive accumulation temperature and negative accumulation temperature combined ventilation regulation and control method Download PDFInfo
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- CN114033463B CN114033463B CN202110826393.1A CN202110826393A CN114033463B CN 114033463 B CN114033463 B CN 114033463B CN 202110826393 A CN202110826393 A CN 202110826393A CN 114033463 B CN114033463 B CN 114033463B
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- 238000009423 ventilation Methods 0.000 title claims abstract description 135
- 238000004321 preservation Methods 0.000 title claims abstract description 48
- 238000009825 accumulation Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 35
- 239000002689 soil Substances 0.000 claims abstract description 67
- 238000009413 insulation Methods 0.000 claims description 26
- 230000001276 controlling effect Effects 0.000 claims description 20
- 230000001105 regulatory effect Effects 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 239000011435 rock Substances 0.000 description 18
- 238000007710 freezing Methods 0.000 description 15
- 230000008014 freezing Effects 0.000 description 12
- 230000006378 damage Effects 0.000 description 11
- 208000027418 Wounds and injury Diseases 0.000 description 10
- 208000014674 injury Diseases 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 230000002265 prevention Effects 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 4
- 230000009746 freeze damage Effects 0.000 description 3
- 230000011218 segmentation Effects 0.000 description 3
- 238000010257 thawing Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/003—Ventilation of traffic tunnels
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2270/00—Control
- F05D2270/30—Control parameters, e.g. input parameters
- F05D2270/303—Temperature
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
A heat preservation structure gap subsection positive accumulation temperature and negative accumulation temperature combined ventilation regulation and control method comprises the following steps: 1) The outside-tunnel weather station thermometer and the multi-year frozen soil section or non-frozen soil section temperature data processor form a temperature data acquisition and analysis subsystem; the temperature data acquisition and analysis subsystem acquires and analyzes outside air temperature data; 2) The process of the combined ventilation regulation comprises the following steps: the air in the tunnel is introduced into the gap of the separated wall type heat preservation layer by adopting the heat preservation layer ventilation hood, wherein the heat preservation layer ventilation hood, a heat preservation layer ventilation hood controller and a heat preservation layer ventilation hood switch form a control switch system of the heat preservation layer ventilation hood, and the heat preservation layer ventilation hood controller receives a command transmitted by the temperature data processor to control the opening and closing of the heat preservation layer ventilation hood. The invention has great advantages in applicability and economy.
Description
Technical Field
The invention belongs to the field of prevention and control of tunnel freezing injury, and particularly relates to a method for preventing and controlling the freezing injury of a tunnel in a cold region by utilizing ventilation of gaps of a wall-separating type heat-insulating structure in a tunnel in a permafrost region.
Background
The ventilation system is widely used in tunnel engineering as a ventilation system for exhausting harmful gas in the tunnel outside the tunnel, and the off-wall type heat insulation structure is widely used in tunnel engineering in the permafrost region as a measure for preventing and controlling the freezing injury of the tunnel in the permafrost region. However, in a permafrost region, surrounding rocks of a non-frozen soil section in a tunnel face the problem of gradually freezing in a low-temperature environment and causing different degrees of freeze injury to the tunnel, and surrounding rocks of a permafrost section face the problem of melting in spring and summer and causing different degrees of disasters to the tunnel. The common measures for preventing and controlling the freezing injury of the tunnel lining and surrounding rock in the cold region at present mainly comprise a thermal insulation layer laying, a cable heating method and the like. The laid heat-insulating layer is currently used as a heat-insulating measure for most tunnels in permafrost areas, and can slow down heat exchange between surrounding rocks and cold air in the tunnels, reduce freezing and thawing rings of the surrounding rocks and alleviate freezing injury of the tunnels, but can not radically solve the problems that the surrounding rocks of non-frozen soil sections are finally frozen and the surrounding rocks of permafrost sections are thawed. The cable heating method has high requirements on electric heating devices and corresponding supporting facilities, high energy consumption, complex management and high operation cost, and has great limitation.
One direction of reducing engineering investment and running cost of cold region tunnel freezing injury prevention and control measures and increasing cold region tunnel freezing injury prevention and control effect is to regulate and control ventilation technology. The cold-proof heat-insulating door is a freeze injury prevention and control technology for preventing cold air from invading a tunnel in winter, can slow down and prevent heat loss in the tunnel hole caused by cold air convection, and further improves the air temperature in the tunnel in winter, reduces surrounding rock freeze-thawing rings and lightens tunnel freeze injury. However, the heat preservation effect is poor due to frequent opening and closing of the cold-proof heat preservation door, the expected effect of preventing and controlling the freezing injury cannot be achieved, and the normal operation of traffic can be influenced by the use of the heat preservation door.
Therefore, the invention provides a method for preventing and controlling the freezing injury of the tunnel in the cold area by utilizing ventilation of the gap of the wall-separating type heat-insulating structure in the tunnel in the permafrost area. The method has the advantages of wide application range, economy and rationality, low requirements on corresponding supporting facilities, low energy consumption, convenient management and low operation cost, and is especially suitable for the conditions of large temperature difference and normal temperature in cold seasons.
Disclosure of Invention
In order to solve the problems that surrounding rocks of a non-frozen soil section of a tunnel in a permafrost region are frozen in a low-temperature environment and the surrounding rocks of the permafrost section are melted in spring and summer, and overcome the defects of the existing anti-freezing heat preservation technology in the aspects of applicability, long-period reliability, economic rationality and the like, the invention provides an effective joint ventilation regulation and control method for positive heat accumulation and negative heat accumulation of a gap section of a wall-separating heat preservation structure of the tunnel in the permafrost region.
The technical scheme adopted for solving the technical problems is as follows:
a heat preservation structure gap subsection positive accumulation temperature and negative accumulation temperature combined ventilation regulation and control method comprises the following steps:
1) The outside-tunnel weather station thermometer and the multi-year frozen soil section or non-frozen soil section temperature data processor form a temperature data acquisition and analysis subsystem; the temperature data acquisition and analysis subsystem acquires and analyzes outside air temperature data;
2) The process of the combined ventilation regulation comprises the following steps:
2.1 The heat-insulating layer ventilation hood is adopted to introduce air in the tunnel into the gap of the wall-separating type heat-insulating layer, wherein the heat-insulating layer ventilation hood, a heat-insulating layer ventilation hood controller and a heat-insulating layer ventilation hood switch form a control switch system of the heat-insulating layer ventilation hood, and the heat-insulating layer ventilation hood controller receives a command transmitted by the temperature data processor to control the opening and closing of the heat-insulating layer ventilation hood;
for non-frozen soil segments: when the air temperature outside the tunnel is higher than a set value, the temperature data processor of the non-frozen soil section transmits a command for starting the ventilation hood of the heat-insulating layer of the non-frozen soil section to the ventilation hood controller of the heat-insulating layer of the non-frozen soil section; and when the air temperature is lower than the set value, the temperature data sensor of the non-frozen soil section transmits a command for closing the ventilation hood of the heat preservation layer of the non-frozen soil section to the ventilation hood controller of the heat preservation layer of the non-frozen soil section.
For permafrost segments: when the air temperature outside the tunnel is lower than a set value, the temperature data processor of the permafrost section transmits an instruction for starting the permafrost section heat-insulating layer ventilation hood to the permafrost section heat-insulating layer ventilation hood controller; and when the air temperature is higher than the set value, the temperature data sensor of the permafrost section transmits a command for closing the permafrost section heat-insulating layer ventilation hood to the permafrost section heat-insulating layer ventilation hood controller.
Further, in the step 2), the ventilation regulation and control are combined, and the process is as follows:
2.2 The local fan is adopted to introduce the air in the tunnel into the gap of the wall-separating type heat preservation layer, wherein the local fan and a local fan controller form a heat preservation layer local ventilation system, and the local fan controller receives the instruction of the temperature data processor to control the start and stop of the local fan;
for non-frozen soil segments: when the air temperature outside the tunnel is higher than a set value, the temperature data processor of the non-frozen soil section transmits an instruction for starting the local fan of the non-frozen soil section to the local fan controller of the non-frozen soil section; when the air temperature is lower than the set value, the temperature data sensor of the non-frozen soil section transmits an instruction for closing the local fan of the non-frozen soil section to the local fan controller of the non-frozen soil section;
for permafrost segments: when the air temperature outside the tunnel is lower than a set value, the temperature data processor of the permafrost section transmits an instruction for starting the permafrost section local fan to the permafrost section local fan controller; and when the air temperature is higher than the set value, the temperature data sensor of the permafrost section transmits a command for closing the permafrost section local fan to the permafrost section local fan controller.
Preferably, the heat-insulating layer ventilation hood or the local fan fully utilizes the space inside and outside the clearance of the tunnel; is connected to the gap of the wall-separating type heat-insulating structure by an air inlet pipeline.
Further, the drainage system ventilation device is made of a steel structure and adopts a temperature measure at the outer side Shi Zuobao;
still further, the wall-separating type heat-insulating structure is fixed by a heat-insulating layer supporting section, a heat-insulating layer supporting section and a heat-insulating layer stress section.
The air inlet pipeline is a prefabricated steel sleeve heat-insulating pipe.
The number of the ventilation hoods is at least two, the ventilation hoods of at least two groups are distributed at intervals of 100-200 m along the length direction of the tunnel, and each group of ventilation hoods comprises a plurality of ventilation hoods distributed at intervals along the circumferential direction of the tunnel.
The number of the local fans is at least two, a plurality of groups of at least two local fans are distributed at intervals of 100-200 m along the length direction of the tunnel, and each group of local fans comprises a plurality of local fans distributed at intervals along the circumferential direction of the tunnel.
In the invention, for the non-frozen soil section, when the air temperature outside the tunnel is higher than a set value, a ventilation hood or a local fan of a non-frozen soil section wall-separating type heat insulation structure is started, so that air enters an air layer between a lining and a heat insulation layer, the temperature of the air layer is increased so as to store heat in the lining and surrounding rock, and when the air temperature is lower than the set value, the heat insulation layer ventilation hood or the local fan of the non-frozen soil section is closed so as to reduce cold brought into the lining and the surrounding rock of the tunnel to generate negative temperature accumulation, thereby achieving the anti-freezing effect of the tunnel; for permafrost sections, when the air temperature outside the tunnel is lower than a set value, a ventilation hood or a local fan of a permafrost section wall-separating type heat insulation structure is started, air enters an air layer between the lining and the heat insulation layer, the temperature of the air layer is reduced, so that cold energy is stored in the lining and surrounding rock, and when the air temperature is higher than the set value, the ventilation hood or the local fan of the permafrost section heat insulation layer is closed, so that heat brought into the tunnel lining and the surrounding rock is reduced, and the effect of preventing the tunnel from thawing is achieved. The temperature of an air layer, lining and surrounding rock between the tunnel lining and the heat insulation layer is regulated by opening the heat insulation layer ventilation hood or the local fan, so that the energy consumption is very low, compared with the traditional cable heating technology, the operation cost is greatly reduced, the cable heating technology is provided with a special cable short-circuit monitor, an alarm, a temperature controller and the like, the control system is complex, the failure risk is high, the failure result is very serious, and the system only needs to control the fan speed through temperature data processing and a fan controller, so that the system is simple and effective. On the other hand, compared with the cold-proof heat-insulating door, the heat-insulating door is not required to be additionally arranged, when the outside air temperature of the tunnel meets the ventilation control requirement, the temperature of the air layer of the wall-separating heat-insulating structure can be adjusted without being influenced by traffic flow, normal traffic operation is not influenced, and engineering investment is low. The technology of the invention has better economical efficiency and reliability than the cable heating technology and the cold-proof heat-insulating door in terms of the long-term frost damage prevention and control effect.
Compared with the prior art, the invention has the following advantages: 1) The invention creatively applies the positive heat accumulation principle and the ventilation regulation concept in the heat preservation and anti-freezing of the tunnel in the cold region, and introduces the air with higher temperature in the tunnel into the air layer of the wall-separating type heat preservation structure through the ventilation hood or the local fan, so that heat is stored in the tunnel lining and surrounding rock to achieve the effect of preventing and controlling the freezing injury of the tunnel; 2) The invention adopts the ventilation hood or the local fan to convey air to the air layer, can fully utilize the space inside the tunnel clearance and outside the limit, has small construction difficulty, and can greatly reduce construction cost, operation cost and energy consumption; 3) The device is easy to manage, has low failure risk, does not influence the normal operation of traffic and is not influenced by traffic, and the long-term reliability and the antifreezing effect of the device and the method are superior to those of a cable heating technology and a cold-proof heat-insulating door.
Drawings
FIG. 1 is a longitudinal section view of a tunnel in a frozen soil area tunnel wall-separating type heat-insulating structure gap segmentation positive accumulation temperature and negative accumulation temperature combined ventilation regulation method in example 1, 1-surrounding rock; 2-lining; 3-air layer; 4-a wall-separating type heat-insulating structure; 5-an off-hole weather station thermometer; 6-a fan; 7-permafrost segment temperature data processor; 8-a permafrost section heat preservation layer ventilation hood controller; 9-ventilation hood switch of the permafrost section heat preservation layer; 10-a ventilation hood of a permafrost section heat preservation layer; 11-permafrost section heat insulation layer ventilation hood connecting wires; 12-permafrost section temperature data transmission line; 13-a non-frozen soil section temperature data processor; 14-a non-frozen soil section heat preservation ventilation hood controller; 15-a ventilation hood switch of the non-frozen soil section heat preservation layer; 16-a ventilation hood of a non-frozen soil section heat preservation layer; 17-connecting wires of a ventilation hood of the insulating layer of the non-frozen soil section; 18-non-frozen soil section temperature data transmission line.
Fig. 2 is a cross-sectional view of a tunnel in a frozen soil area tunnel wall-separating type insulation structure gap segmentation positive heat accumulation and negative heat accumulation combined ventilation regulation method in example 1.
FIG. 3 is a longitudinal section view of a tunnel in a method for regulating and controlling positive and negative accumulation temperatures in a gap section joint ventilation mode of a wall-separated type heat-insulating structure of a tunnel in a frozen soil area in embodiment 2, wherein the longitudinal section view is 1-surrounding rock; 2-lining; 3-air layer; 4-a wall-separating type heat-insulating structure; 5-an off-hole weather station thermometer; 6-a permafrost section local fan; 7-permafrost segment temperature data processor; 8-a permafrost section local fan controller; 9-a local fan connecting wire of the permafrost section; 10-permafrost section temperature data transmission line; 11-a local fan of the non-frozen soil section; 12-a non-frozen soil section temperature data processor; 13-a local fan controller of the non-frozen soil section; 14-connecting lines of local fans of the non-frozen soil sections; 15-non-frozen soil section temperature data transmission line.
Fig. 4 is a cross-sectional view of a tunnel in a frozen soil area tunnel wall-separating type insulation structure gap segmentation positive heat accumulation and negative heat accumulation combined ventilation regulation method in example 2.
FIG. 5 is a schematic illustration of an insulation hood, 101 (or 161) -insulation hood body; 102 (or 162) -the wide mouth end of the insulation ventilation hood; 103 (or 163) -insulating layer ventilation hood home opening end; 104 (or 164) -the insulating layer ventilation hood opens and closes the door.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Example 1
Referring to fig. 1, 2 and 5, a method for regulating and controlling the joint ventilation of positive and negative heat accumulation of a gap section of a heat-insulating structure comprises the following steps:
step one: the temperature data transmission line is led out from the temperature data processor and is connected to the thermometer of the weather station outside the tunnel, the air temperature data of the tunnel opening are collected, and the data processing result is transmitted to the ventilation hood controller of the heat preservation layer in a command mode, and the weather station outside the tunnel is arranged in the range of 100m of the tunnel opening;
step two: the heat-insulating layer ventilation hood controller is connected with the heat-insulating layer ventilation hood switch and the temperature field data processor, receives a command transmitted from the temperature data processor, and controls the opening and closing of the heat-insulating layer ventilation hood according to the air temperature condition outside the hole;
step three: the shrinking end of the heat-insulating layer ventilation hood is connected to the air layer through a pipeline penetrating through the fireproof plate and the heat-insulating plate, an opening and closing door is arranged at the pipeline inlet of the shrinking end, and the opening and closing door can be controlled through a heat-insulating layer ventilation hood switch and a heat-insulating layer ventilation hood controller; the enlarged end increases the ventilation sectional area, increases the ventilation air quantity and improves the ventilation efficiency;
step four: in order to ensure smooth ventilation of an air layer between the lining and the heat preservation, the method for regulating and controlling the positive heat accumulation and the negative heat accumulation of the gap section of the wall-separated heat preservation structure of the permafrost region tunnel is arranged in a longitudinal section of the tunnel, and ventilation hoods of each section of heat preservation are arranged at intervals of 100-200 m along the longitudinal direction of the tunnel.
Step five: in order to ensure that enough air quantity can be provided to exhaust air in the air layer between the lining and the heat insulation layer, the transverse ventilation area of the ventilation hood of the heat insulation layer is enough toThe following requirements are: when the diameter of the tunnel cross section is not more than 10m, the ventilation area is not less than 1.2m 2 The method comprises the steps of carrying out a first treatment on the surface of the When the diameter of the tunnel cross section exceeds 10m and does not exceed 16m, the ventilation area is not less than 2m 2 . The cross section arrangement form of the heat preservation ventilation hood recommends to adopt the arrangement form of fig. 3, so that the space of a tunnel can be fully utilized and air can be respectively sent into the air layers of the support section and the support section of the wall-separating type heat preservation structure;
step six: the method comprises the steps of acquiring temperature data from an off-hole weather station, for a non-frozen soil section, transmitting an instruction for opening a ventilation hood of a non-frozen soil section heat preservation layer to a ventilation hood controller of the non-frozen soil section when the air temperature outside a tunnel is higher than 0 ℃ (e.g. set to 5 ℃), and transmitting an instruction for closing the ventilation hood of the non-frozen soil section heat preservation layer to the ventilation hood controller of the non-frozen soil section when the air temperature is lower than the set value; for permafrost sections, when the air temperature outside the tunnel is below 0 ℃ (e.g., -1 ℃), instructions to open the permafrost section insulation ventilation hood are transmitted to the permafrost section insulation ventilation hood controller, and when the air temperature is above the set value, the permafrost section temperature data processor transmits instructions to close the permafrost section insulation ventilation hood to the permafrost section insulation ventilation hood controller. The heat-insulating layer ventilation hood controller receives the instruction transmitted by the temperature data processor to control the opening and closing of the heat-insulating layer ventilation hood.
In this embodiment, the heat-insulating layer ventilation hood or the local fan fully utilizes the space inside the tunnel clearance and outside the limit; is connected to the gap of the wall-separating type heat-insulating structure by an air inlet pipeline. The drainage system ventilation device is made of a steel structure and adopts a temperature measure at the outer side Shi Zuobao; the wall-separating type heat-insulating structure is fixed by a heat-insulating layer supporting section, a heat-insulating layer supporting section and a heat-insulating layer stress section. The air inlet pipeline is a prefabricated steel sleeve heat-insulating pipe.
Example 2
Referring to fig. 3, 4 and 5, a method for regulating and controlling the joint ventilation of positive and negative heat accumulation of a gap section of a heat-insulating structure comprises the following steps:
step one: the temperature data transmission line is led out from the temperature data processor and is connected to the thermometer of the weather station outside the tunnel, the air temperature data of the tunnel opening are collected, and the data processing result is transmitted to the local fan controller in a command mode, and the weather station outside the tunnel is arranged in the range of 100m of the tunnel opening;
step two: the local fan controller is connected with the local fan and the temperature field data processor, receives a command transmitted by the temperature data processor, and controls the start and stop of the local fan according to the air temperature condition outside the hole;
step three: the air outlet of the local fan is connected to an air layer between the heat insulation layer and the lining, and the air is brought into the air layer by the control of the local fan controller, so that the temperature of the air layer is regulated;
step four: in order to ensure smooth ventilation of an air layer between the lining and the heat preservation layer, the method for regulating and controlling positive accumulation temperature and negative accumulation temperature of a gap section of a wall-separated heat preservation structure of a permafrost region tunnel is arranged in a longitudinal section of the tunnel, and each section of local fan is arranged at intervals of 100-200 m along the longitudinal direction of the tunnel.
Step five: in order to ensure that enough air volume can be provided to exhaust air in the air layer between the lining and the heat insulation layer, the transverse arrangement of the local fans should meet the following requirements: when the diameter of the cross section of the tunnel is not more than 10m, arranging 4 local fans on each cross section, wherein the caliber of each fan is not less than 600mm; when the diameter of the tunnel cross section exceeds 10m and is not more than 16m, 4 local fans are arranged on each section, and the caliber of each fan is not less than 800mm. The cross section arrangement form of the local fan recommends to adopt the arrangement form of fig. 5, so that the space of a tunnel can be fully utilized and air can be respectively sent into the support section of the wall-separating type heat insulation structure and the air layer of the support section;
step six: the method comprises the steps that temperature data are acquired from an off-hole weather station, for a non-frozen soil section, when the temperature outside a tunnel is higher than 0 ℃ (e.g. set to 5 ℃), a non-frozen soil section temperature data processor transmits an instruction for starting a non-frozen soil section local fan to a non-frozen soil section local fan controller, and when the temperature is lower than the set value, the non-frozen soil section temperature data processor transmits an instruction for closing the non-frozen soil section local fan to the non-frozen soil section local fan controller; for a permafrost segment, when the air temperature outside the tunnel is below 0 ℃ (e.g., -1 ℃), the permafrost segment temperature data processor transmits a command to turn on the permafrost segment local fan to the permafrost segment local fan controller, and when the air temperature is above this value, the permafrost segment temperature data processor transmits a command to turn off the permafrost segment local fan to the permafrost segment local fan controller. The local fan controller receives the instruction of the temperature data processor to control the start and stop of the local fan.
In this embodiment, the heat-insulating layer ventilation hood or the local fan fully utilizes the space inside the tunnel clearance and outside the limit; is connected to the gap of the wall-separating type heat-insulating structure by an air inlet pipeline. The drainage system ventilation device is made of a steel structure and adopts a temperature measure at the outer side Shi Zuobao; the wall-separating type heat-insulating structure is fixed by a heat-insulating layer supporting section, a heat-insulating layer supporting section and a heat-insulating layer stress section. The air inlet pipeline is a prefabricated steel sleeve heat-insulating pipe.
The embodiments described in this specification are merely illustrative of the manner in which the inventive concepts may be implemented. The scope of the present invention should not be construed as being limited to the specific forms set forth in the embodiments, but the scope of the present invention and the equivalents thereof as would occur to one skilled in the art based on the inventive concept.
Claims (8)
1. The method for regulating and controlling the joint ventilation of the gap subsection positive accumulation temperature and the negative accumulation temperature of the heat-insulating structure is characterized by comprising the following steps:
1) The outside-tunnel weather station thermometer and the multi-year frozen soil section or non-frozen soil section temperature data processor form a temperature data acquisition and analysis subsystem; the temperature data acquisition and analysis subsystem acquires and analyzes outside air temperature data;
2) The process of the combined ventilation regulation is as follows:
2.1 The heat-insulating layer ventilation hood is adopted to introduce air in the tunnel into the gap of the wall-separating type heat-insulating layer, wherein the heat-insulating layer ventilation hood, a heat-insulating layer ventilation hood controller and a heat-insulating layer ventilation hood switch form a control switch system of the heat-insulating layer ventilation hood, and the heat-insulating layer ventilation hood controller receives a command transmitted by the temperature data processor to control the opening and closing of the heat-insulating layer ventilation hood;
for non-frozen soil segments: when the air temperature outside the tunnel is higher than a set value, the temperature data processor of the non-frozen soil section transmits a command for starting the ventilation hood of the heat-insulating layer of the non-frozen soil section to the ventilation hood controller of the heat-insulating layer of the non-frozen soil section; when the air temperature is lower than the set value, the temperature data sensor of the non-frozen soil section transmits a command for closing the ventilation hood of the heat preservation layer of the non-frozen soil section to the ventilation hood controller of the heat preservation layer of the non-frozen soil section;
for permafrost segments: when the air temperature outside the tunnel is lower than a set value, the temperature data processor of the permafrost section transmits an instruction for starting the permafrost section heat-insulating layer ventilation hood to the permafrost section heat-insulating layer ventilation hood controller; and when the air temperature is higher than the set value, the temperature data sensor of the permafrost section transmits a command for closing the permafrost section heat-insulating layer ventilation hood to the permafrost section heat-insulating layer ventilation hood controller.
2. The method for regulating and controlling the joint ventilation of the gap subsection positive accumulation temperature and the negative accumulation temperature of the heat-insulating structure according to claim 1, wherein in the step 2), or the joint ventilation regulating and controlling process is as follows:
2.2 The local fan is adopted to introduce the air in the tunnel into the gap of the wall-separating type heat preservation layer, wherein the local fan and a local fan controller form a heat preservation layer local ventilation system, and the local fan controller receives the instruction of the temperature data processor to control the start and stop of the local fan;
for non-frozen soil segments: when the air temperature outside the tunnel is higher than a set value, the temperature data processor of the non-frozen soil section transmits an instruction for starting the local fan of the non-frozen soil section to the local fan controller of the non-frozen soil section; when the air temperature is lower than the set value, the temperature data sensor of the non-frozen soil section transmits an instruction for closing the local fan of the non-frozen soil section to the local fan controller of the non-frozen soil section;
for permafrost segments: when the air temperature outside the tunnel is lower than a set value, the temperature data processor of the permafrost section transmits an instruction for starting the permafrost section local fan to the permafrost section local fan controller; and when the air temperature is higher than the set value, the temperature data sensor of the permafrost section transmits a command for closing the permafrost section local fan to the permafrost section local fan controller.
3. The method for regulating and controlling the joint ventilation of the gap subsection positive accumulation temperature and the negative accumulation temperature of the heat-insulating structure according to claim 1 or 2, wherein an air layer is arranged between the lining of the tunnel and the heat-insulating layer, and the ventilation hood or the local fan of the heat-insulating layer fully utilizes the space inside and outside the clearance of the tunnel; the air inlet of the ventilation hood faces the air outlet of the ventilator in the tunnel, the air outlet of the ventilation hood is communicated with the air layer through the ventilation hood air guide pipe, and the air outlet of the local fan is communicated with the air layer through the local fan air guide pipe.
4. The method for regulating and controlling the joint ventilation of the gap subsection positive accumulation temperature and the negative accumulation temperature of the heat-insulating structure according to claim 1 or 2, wherein the ventilation device of the drainage system is made of a steel structure and adopts a measure of Shi Zuobao temperature at the outer side.
5. The method for regulating and controlling the joint ventilation of the gap subsection positive accumulation temperature and the negative accumulation temperature of the heat-insulating structure according to claim 1 or 2, wherein the wall-separating type heat-insulating structure is a wall-separating type heat-insulating structure which is fixed by a heat-insulating layer supporting section, a heat-insulating layer supporting section and a heat-insulating layer stress section.
6. The method for regulating and controlling the joint ventilation of the heat preservation structure by sectioning positive accumulation temperature and negative accumulation temperature in the gap of the heat preservation structure according to claim 1 or 2, wherein an air inlet pipeline is connected into the gap of the wall-separated heat preservation structure, and the air inlet pipeline is a prefabricated steel sleeve heat preservation pipe.
7. The method for regulating and controlling the combined ventilation of the heat insulation structure gap subsection positive accumulation temperature and the negative accumulation temperature according to claim 1 or 2, wherein the number of the ventilation hoods is at least two groups, the at least two groups of ventilation hoods are distributed at intervals of 100-200 m along the length direction of the tunnel, and each group of ventilation hoods comprises a plurality of ventilation hoods distributed at intervals along the circumferential direction of the tunnel.
8. The method for regulating and controlling the joint ventilation of the heat preservation structure gap in a segmented positive heat accumulation mode and a negative heat accumulation mode according to claim 2, wherein the number of the local fans is at least two, a plurality of groups of at least two local fans are distributed at intervals of 100-200 m along the length direction of the tunnel, and each group of local fans comprises a plurality of local fans distributed at intervals along the circumferential direction of the tunnel.
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