CN112796797A - Disease treatment method for operating subway tunnel micro-crack leakage water - Google Patents

Disease treatment method for operating subway tunnel micro-crack leakage water Download PDF

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Publication number
CN112796797A
CN112796797A CN202011632670.7A CN202011632670A CN112796797A CN 112796797 A CN112796797 A CN 112796797A CN 202011632670 A CN202011632670 A CN 202011632670A CN 112796797 A CN112796797 A CN 112796797A
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Prior art keywords
crack
cracks
tunnel
color
head
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CN202011632670.7A
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Chinese (zh)
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CN112796797B (en
Inventor
王玥
贺雄飞
刘永胜
赵喜斌
钟有信
徐启鹏
赵军喜
邹翀
张迅
宋妍
洪侨亨
苏拥军
史继尧
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Nanning Rail Transit Co ltd
China Railway Tunnel Group Co Ltd CRTG
CRTG Survey and Design Institute Co Ltd
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Nanning Rail Transit Co ltd
China Railway Tunnel Group Co Ltd CRTG
CRTG Survey and Design Institute Co Ltd
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Priority to CN202011632670.7A priority Critical patent/CN112796797B/en
Publication of CN112796797A publication Critical patent/CN112796797A/en
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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • F24H3/0423—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between hand-held air guns
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/0052—Details for air heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/003—Supply-air or gas filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Microbiology (AREA)
  • Lining And Supports For Tunnels (AREA)

Abstract

The invention discloses a method for remedying the diseases of the water leakage of tiny cracks of an operation subway tunnel, which comprises the following steps: step one, a handheld hot air device is used, the air port faces and is close to a water leakage area of a micro crack of a subway tunnel lining, hot air is blown, the color of the tunnel lining without the crack is changed from a dark color to a light color, the color of the tunnel lining with the crack is continuously the dark color, and the micro crack and the subsurface crack are exposed due to the color change. And secondly, drawing the micro cracks and the subsurface cracks by using a marker pen, and carrying out position marking. The disease treatment method can be used for conveniently and quickly positioning the cracks, and meanwhile, water films in the cracks and on the surface of lining concrete are eliminated, so that the repairing and water stopping effects of subsequent treatment construction are guaranteed.

Description

Disease treatment method for operating subway tunnel micro-crack leakage water
[ technical field ] A method for producing a semiconductor device
The invention belongs to the technical field of tunnel disease treatment, and particularly relates to a disease treatment method for leakage water of tiny cracks of an operation subway tunnel.
[ background of the invention ]
In the field of tunnel engineering, after a subway tunnel is built, due to the defects of load condition change, concrete aging or construction, a lining structure may have tiny cracks, when the tunnel is buried deep below an underground water level, the situation of water leakage can occur, the humidity in the tunnel is increased, water vapor is diffused, and the water vapor is attached to the inner surface of the tunnel after condensation and is soaked all the year round, so that potential safety hazards are brought to normal operation of trains and equipment.
In order to solve the problem, disease treatment is required, and high polymer materials are often injected or cement-based permeable crystallization materials are often coated to repair cracks, isolate water leakage and avoid accelerated damage of a tunnel structure.
In the actual disease treatment construction process, two problems exist:
firstly, tiny crack location difficulty, because the infiltration water humidity leads to whole tunnel internal surface all to be soaked by the condensation steam, the crack of 1mm width is difficult to discern to the naked eye, and in addition, some cracks are in the lining cutting in succession development, but do not ftracture to the lining cutting surface, more difficult discovery. The general method is that a high-power fan is arranged at the tunnel section, after the air is blown for 3-5 days, water vapor in the tunnel is reduced, condensed water on the inner surface disappears, and fine cracks can be found out, but the method is limited in operation of subway tunnels, and the high-power fan is difficult to arrange because the section of the subway tunnel is small and the clearance is limited;
and secondly, the water seepage permeates cracks and lining concrete around the cracks, a water film is formed on the surface of the lining concrete, the cementation and combination of the repairing material and the lining concrete are seriously influenced, the repairing material cannot fully play the role, and particularly, the penetration depth of the repairing material is greatly reduced when the surface is coated with a cement-based permeable crystalline material for repairing.
Therefore, when the tiny crack water leakage disease is treated in the subway tunnel in the operation state, a convenient, quick and energy-saving treatment method is needed, which helps constructors to accurately position tiny cracks, can eliminate water films in the cracks and on the surface of lining concrete in a short time, and injects or applies repairing materials in a dry state to ensure the effects of repairing and stopping water.
[ summary of the invention ]
The invention aims to provide a method for remedying the damage of the leakage water of the tiny cracks of the subway tunnel, which can conveniently and quickly position the cracks and eliminate water films in the cracks and on the surface of lining concrete so as to ensure the repairing and water stopping effects of subsequent remediation construction.
The invention adopts the following technical scheme: a method for remedying the diseases of the leakage water of the tiny cracks of the subway operation tunnel comprises the following steps:
step one, a handheld hot air device is used, the air port faces and is close to a water leakage area of a micro crack of a subway tunnel lining, hot air is blown, the color of the tunnel lining without the crack is changed from a dark color to a light color, the color of the tunnel lining with the crack is continuously the dark color, and the micro crack and the subsurface crack are exposed due to the color change.
And secondly, drawing the micro cracks and the subsurface cracks by using a marker pen, and carrying out position marking.
Step three, repairing each crack in sequence, wherein the process is as follows:
step 3.1, fracture segmentation: dividing a crack into a plurality of sections from the head end to the tail end in sequence;
step 3.2, drying and repairing the cracks: starting from one section of the crack head end, blowing hot air to the section by using a handheld hot air device until the color of the section of the crack is changed from dark color to light gray consistent with the periphery, and finishing the drying of the section of the crack;
injecting glue solution into the crack or painting cement-based permeable crystalline material to make the glue solution or the cement-based permeable crystalline material and the lining concrete be glued into a whole; and the same drying and repairing processes are adopted to complete the repair of each section of the crack in sequence.
And 3.3, repeating the step 3.1 to the step 3.2 to finish the repair of each crack.
Further, in step 3.1, the fracture is segmented, with the length of each segment being no greater than 1 m.
Further, in step 3.2, before injecting glue solution into the cracks, inclined holes are drilled at intervals from the head ends to the tail ends of the cracks to the tunnel lining, and all the holes penetrate through the left and right sides of the cracks; and embedding glue injection nails are coaxially arranged in the inclined holes.
Further, before the step one, the inner surface of the tunnel is cleaned.
Furthermore, the handheld hot air device comprises an air heater, an air outlet of the air heater is connected with a hose, and the head end of the hose is provided with an air blowing head;
the air blowing head is a horn-shaped shell, axial seam-limiting needles are arranged on the inner wall of the horn-shaped shell at intervals, the head ends of the seam-limiting needles penetrate out of the head end of the air blowing head, and the head ends of the seam-limiting needles are used for abutting against the lining surface of the tunnel, so that an air outlet channel is formed between the head end of the horn-shaped shell and the lining surface of the tunnel;
a surrounding eave is arranged on the periphery of the air outlet end of the horn-shaped shell and is disc-shaped and used for converting axial wind blown out from the horn-shaped shell into ordered radial wind.
Furthermore, the air heater comprises a double-layer shell, the head end and the tail end of the double-layer shell are both open, and the tail end of the double-layer shell is covered and installed with a metal mesh-shaped air filtering cover for filtering impurities in the air; the outlet at the head end of the hose is connected with the hose;
the fan blades and the motor are arranged in the double-layer shell and positioned at the tail end of the double-layer shell, and the motor is used for driving the fan blades to rotate;
an electric heating wire (14) is arranged in the double-layer shell close to the head end and used for heating the air in the shell.
Furthermore, the telescopic rod is also included, and the head end of the telescopic rod is connected with the blowing head and used for supporting the blowing head; the end of which is used for grasping.
Furthermore, a temperature sensor is arranged in the double-layer shell and positioned at the air outlet at the head end of the double-layer shell.
The invention has the beneficial effects that: 1. sending hot air to the surface of the lining in a short distance, efficiently and quickly drying condensed water, and accurately positioning micro cracks and hidden cracks; the time for positioning the crack is short, and the energy is saved.
2. The water films in the cracks and on the surface of the lining concrete can be eliminated in a short time, and the repairing material is injected or coated in a follow-up manner, so that the better guarantee effect can be achieved.
[ description of the drawings ]
FIG. 1 is a schematic view of a hand held hot air device;
FIG. 2 is a sectional view of a hand-held hot air blower;
FIG. 3 is a right side view (1-1) of the hand held hot air blower;
FIG. 4 is a structural assembly diagram of a hand-held hot air blowing head;
FIG. 5 is a right side view (2-2) of the hand held hot air blowing head configuration;
FIG. 6 is a schematic view of an auxiliary operation for treating water leakage in an operating tunnel;
wherein: 1. a hot air blower; 2. a hose; 3. a blowing head; 4. a telescopic rod;
11. a motor; 12. a fan blade; 13. a wind filtering cover; 14. an electric heating wire; 15. a double shell; 16. a temperature sensor; 17. a switch; 18. a handle; 19. a support leg;
31. a horn-shaped housing; 32. a stitch limiting needle;
41. a rod body; 42. and (5) quickly locking the knob.
[ detailed description ] embodiments
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention relates to a method for treating diseases caused by water leakage of tiny cracks of an operation subway tunnel, which comprises the following steps:
step one, clearing the inner surface of the tunnel. After the cleaning, a handheld hot air device is used, the air port blows hot air towards and close to a water leakage area of the micro cracks of the subway tunnel lining, the color of the tunnel lining without the cracks is changed from deep color to light color, the color of the tunnel lining with the cracks is continuously deep color, and the micro cracks and the cracks under the surface are exposed out through color change. As shown in fig. 1 and 6.
And secondly, drawing the micro cracks and the subsurface cracks by using a marker pen, and carrying out position marking.
And step three, repairing the cracks in sequence.
In the third step, the process of repairing each crack is as follows:
step 3.1, fracture segmentation: and dividing one crack into a plurality of sections from the head end to the tail end in sequence. When the crack is segmented, the length of each segment is not more than 1 m.
Step 3.2, drying and repairing the cracks: and (3) starting from one section of the crack head end, blowing hot air to the section by using a handheld hot air device until the color of the section of the crack is changed from dark color to light gray consistent with the periphery, and finishing the drying of the section of the crack.
Injecting glue solution into the crack or painting cement-based permeable crystalline material to make the glue solution or the cement-based permeable crystalline material and the lining concrete be glued into a whole; and the same drying and repairing processes are adopted to complete the repair of each section of the crack in sequence.
And 3.3, repeating the step 3.1 to the step 3.2 to finish the repair of each crack.
In the step 3.2, before injecting the glue solution into the cracks, inclined holes are drilled at intervals from the head ends to the tail ends of the cracks to the tunnel lining, and all the holes penetrate through the left and right sides of the cracks; and embedding glue injection nails are coaxially arranged in the inclined holes.
As shown in fig. 1-5, the handheld hot air device includes an air heater 1, an air outlet of the air heater 1 is connected with a hose 2, and a blowing head 3 is installed at a head end of the hose 2;
the telescopic rod 4 is connected with the blowing head 3 at the head end and is used for supporting the blowing head 3; the end of which is used for grasping.
The air heater 1 comprises a double-layer shell 15, the head end and the tail end of the double-layer shell 15 are both open, and a metal mesh-shaped air filter cover 13 is covered and installed at the tail end of the double-layer shell for filtering impurities in air; the outlet at the head end is connected with the hose 2; the hose 2 is a special ventilation pipe, namely heat-resistant flame-retardant PVC double-sided reinforced fiber mesh cloth, and the diameter of the hose 2 is less than 15cm.
In the double-layer shell 15, and at the tail end thereof, a fan blade 12 and a motor 11 are arranged, and the motor 11 is used for driving the fan blade 12 to rotate. The motor 11 is fixed in the double-layer housing 15 by an internal bracket. A heating wire 14 is provided at the head end inside the double-layered casing 15 for heating the air inside the casing.
When the power is switched on, the motor 11 is started to drive the fan blades 12 to rotate, so that air is sucked from the air filtering cover 13 at the tail end and is blown out to one side of the electric heating wire 14. The air filter cover 13 is a metal mesh to prevent impurities or combustible materials with small particle size from being sucked into the hot air blower 1.
The inner shell of the double-layer shell 15 is made of metal, the outer shell is made of heat-resistant hard plastic, and in the working process of the air heater 1, the phenomenon that the outer surface is overheated and scalds people is avoided.
A temperature sensor 16 is arranged in the double-layer shell 15 and at the air outlet at the head end thereof. The temperature sensor 16 is fixed in the air outlet. The head end in the double-layer shell 15 is provided with a heating wire 14. When the temperature is higher than 60 ℃, the power supply of the electric heating wire is automatically cut off, and when the temperature is lower than 50 ℃, the power supply of the electric heating wire is automatically switched on.
Two switches 17 are arranged outside the double-layer shell 15 and are independently arranged and respectively correspond to the motor 11 and the heating wire 14, namely cold air and hot air can be respectively provided so as to flexibly adapt to the site. A handle 18 is mounted on the double-layer shell 15 and extends from the tail end to the head end, so that the lifting and moving are convenient. The bottom of the outer part of the double-layer shell 15 is provided with four support legs 9, and the four support legs 9 are made of metal materials.
The air blowing head 3 is a horn-shaped shell 31, axial seam limiting needles 32 are arranged at intervals on the periphery of the inner wall of the horn-shaped shell 31, the head ends of the seam limiting needles 32 penetrate through the head end of the air blowing head 3, and the head ends of the seam limiting needles are used for abutting against the lining surface of the tunnel, so that an air outlet channel is formed between the head end of the horn-shaped shell 31 and the lining surface of the tunnel;
an enclosing eave is arranged on the periphery of the air outlet end of the horn-shaped shell 31 and is disc-shaped and used for converting axial wind blown out from the horn-shaped shell into ordered radial wind. When blowing, the blowing head 3 is pushed against the surface of the lining, and the distance between the blowing head 3 and the lining is controlled by using the length of the seam limiting needle 32, so that the wind power is stable and is blown uniformly to the periphery. A temperature sensor 16 is arranged in the double-layer shell 15 and at the air outlet at the head end thereof.
The telescopic rod 4 comprises a rod body 41, the head end of the rod body 41 is fixed on the fin-shaped plate on the side face of the horn-shaped shell 31 through a quick locking knob 42, the telescopic rod 4 can be quickly adjusted in real time, the included angle between the blowing heads 3 can be adjusted, and the arc surface in the tunnel can work flexibly.
(1) Equipment debugging:
the air heater 1, the hose 2, the head of blowing 3, the telescopic link 4 that will operate tunnel percolating water disease renovation auxiliary kit is connected, according to the region that will blow, adjusts the length of telescopic link 4 and the angle of the head of blowing 3 to make the head of blowing 3 can support on the crack.
And (4) switching on the power supply, turning on a power switch of the motor 11, commissioning the equipment, checking whether air leakage exists at each connection part, and if the air leakage exists, reconnecting.
(2) Surface cleaning:
if plaster, moss or other sheet-like attachments are adhered to the inner surface of the tunnel, the attachments are removed, and then the tunnel is washed by a high-pressure water nozzle to expose the concrete material.
(3) Positioning the crack:
as shown in fig. 6, the user holds the telescopic rod 4, pushes the blowing head 3 against the surface of the tunnel lining, opens the switch 17, blows hot air to the surface of the tunnel lining, and carefully observes the color of the surface of the tunnel lining. And (4) conveying hot air to the surface of the lining in a short distance, and quickly drying the condensate water to position cracks.
The concrete is soaked by water and is dark, and is light gray after being dried. The crack-free area is only wetted by water vapor and rapidly changes to light gray in hot air, generally within 1 minute. The cracked area, including the cracks appearing on the surface and the hidden cracks under the surface, contains water in the cracks and has certain depth, the water is slowly evaporated, and the cracks appear in dark color compared with the peripheral seamless area, at the moment, the positions of all the cracks are marked by a marker pen, and the subsequent treatment is carried out.
(4) Preparation of repair:
the repair can be done by methods such as punch injection and surface brushing.
If the punching injection method is adopted, punching holes to penetrate through the cracks according to the marked crack positions, and embedding the glue injection nails. And then, adjusting the colloid and preparing for glue injection.
If the surface painting method is adopted, the cement-based permeable crystalline material is adjusted according to the marked crack position and is ready for painting.
(5) Drying and repairing cracks:
and dividing the crack into multiple sections in sequence and carrying out sectional treatment. And continuously blowing hot air to dry the first section of the crack from one end of the crack for more than 5 minutes, and after the dark trace of the section is completely changed into light gray consistent with the periphery, indicating that the water film on the inner surface of the section of the crack disappears, and at the moment, quickly injecting glue solution or coating cement-based permeable crystalline material so as to be tightly bonded with the lining concrete into a whole. The hot air is delivered to the surface of the lining in a short distance, and the water film in the crack can be dried in a short time. The repairing material and the concrete material are better bonded, and the repairing and water stopping effects are ensured.
And then along the crack direction, the lower section is repaired, the hot air range of the lower section is still blown to the upper section, the glue solution or the cement-based permeable crystalline material is helped to be better and faster coagulated, and the length of the section is preferably not more than 1m when the crack is repaired.

Claims (8)

1. A method for remedying the diseases of the leakage water of the tiny cracks of the subway operation tunnel is characterized by comprising the following steps:
step one, a handheld hot air device is used, hot air is blown to an air port towards and close to a water leakage area of a micro crack of a subway tunnel lining, the color of a tunnel lining without the crack is changed from a dark color to a light color, the color of the tunnel lining with the crack is continuously the dark color, and the micro crack and a crack under the surface are exposed due to the color change;
secondly, drawing the micro cracks and the subsurface cracks by using a marker pen, and marking positions;
step three, repairing each crack in sequence, wherein the process is as follows:
step 3.1, fracture segmentation: dividing one crack into a plurality of sections from the head end to the tail end in sequence;
step 3.2, drying and repairing the cracks: starting from one section of the crack head end, blowing hot air to the section by using a handheld hot air device until the color of the section of the crack is changed from dark color to light gray consistent with the periphery, and finishing the drying of the section of the crack;
injecting glue solution into the crack or painting cement-based permeable crystalline material to make the glue solution or the cement-based permeable crystalline material and the lining concrete be glued into a whole; and the same drying and repairing processes are adopted to complete the repair of each section of the crack in sequence.
And 3.3, repeating the step 3.1 to the step 3.2 to finish the repair of each crack.
2. The method for remedying the disease of the water leakage from the tiny cracks in the subway tunnel as claimed in claim 1, wherein in the step 3.1, when the cracks are segmented, the length of each segment is not more than 1 m.
3. The method for remedying the disease of the water leakage of the micro cracks of the tunnel operating the subway as claimed in claim 3, wherein in the step 3.2, before injecting the glue solution into the cracks, inclined holes are drilled at intervals from the head end to the tail end of the cracks to the tunnel lining, and each hole penetrates through the left and right sides of the cracks; and embedding glue injection nails are coaxially arranged in the inclined holes.
4. The method for remedying the damage of the water leakage of the micro cracks of the tunnel of the subway in operation according to claim 3, wherein before the step one, the inner surface of the tunnel is cleaned.
5. The method for remedying the disease of the water leakage in the micro cracks of the subway tunnel in the operation process according to claim 4, wherein the handheld hot air device comprises a hot air blower (1), an air outlet of the hot air blower (1) is connected with a hose (2), and a blowing head (3) is installed at the head end of the hose (2);
the air blowing head (3) is a horn-shaped shell (31), axial seam limiting needles (32) are arranged on the inner wall of the horn-shaped shell (31) at intervals around the circumference, the head ends of the seam limiting needles (32) penetrate out of the head end of the air blowing head (3), and the head ends of the seam limiting needles are used for abutting against a tunnel lining surface, so that an air outlet channel is formed between the head end of the horn-shaped shell (31) and the tunnel lining surface;
a periphery of the air outlet end of the horn-shaped shell (31) is provided with a surrounding eave which is disc-shaped and used for converting axial wind blown out from the horn-shaped shell into ordered radial wind.
6. The method for remedying the disease of the water leakage in the tiny cracks of the operating subway tunnel according to claim 5, wherein the air heater (1) comprises a double-layer shell (15), the head end and the tail end of the double-layer shell (15) are both open, and a metal mesh-shaped air filter cover (13) is covered and installed at the tail end of the double-layer shell for filtering impurities in the air; the outlet at the head end is connected with the hose (2);
a fan blade (12) and a motor (11) are arranged in the double-layer shell (15) and positioned at the tail end of the double-layer shell, and the motor (11) is used for driving the fan blade (12) to rotate;
an electric heating wire (14) is arranged in the double-layer shell (15) close to the head end and used for heating air in the shell.
7. The method for remedying the disease of the leakage water of the micro cracks of the operating subway tunnel according to claim 6, further comprising a telescopic rod (4), the head end of which is connected with the blowing head (3) and is used for supporting the blowing head (3); the end of which is used for grasping.
8. The method for remedying the damage of the water leakage in the micro cracks of the subway tunnel as claimed in claim 7, wherein a temperature sensor (16) is arranged in the double-layer shell (15) and at the air outlet at the head end thereof.
CN202011632670.7A 2020-12-31 2020-12-31 Disease treatment method for operating subway tunnel micro-crack leakage water Active CN112796797B (en)

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CN209985721U (en) * 2019-05-05 2020-01-24 上海市地江建筑科技有限公司 Coating drying device
KR20200088018A (en) * 2019-01-14 2020-07-22 표대열 Coating method of mold wash using an impregnating apparatus equipped a lift-type perforated plate
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