CN114215555A - Concrete impermeability method for repairing tunnel leakage water - Google Patents
Concrete impermeability method for repairing tunnel leakage water Download PDFInfo
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- CN114215555A CN114215555A CN202111295548.XA CN202111295548A CN114215555A CN 114215555 A CN114215555 A CN 114215555A CN 202111295548 A CN202111295548 A CN 202111295548A CN 114215555 A CN114215555 A CN 114215555A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 102
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000004568 cement Substances 0.000 claims abstract description 62
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 32
- 229920000642 polymer Polymers 0.000 claims abstract description 26
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 14
- 239000004917 carbon fiber Substances 0.000 claims abstract description 14
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000004744 fabric Substances 0.000 claims abstract description 8
- 230000002787 reinforcement Effects 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 37
- 229910000831 Steel Inorganic materials 0.000 claims description 29
- 239000010959 steel Substances 0.000 claims description 29
- 239000011440 grout Substances 0.000 claims description 20
- 230000003014 reinforcing effect Effects 0.000 claims description 12
- 201000010099 disease Diseases 0.000 claims description 7
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 claims description 7
- 230000001680 brushing effect Effects 0.000 claims description 6
- 238000009792 diffusion process Methods 0.000 claims description 6
- 238000005553 drilling Methods 0.000 claims description 6
- 239000000428 dust Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 6
- 239000003822 epoxy resin Substances 0.000 claims description 6
- 229920000647 polyepoxide Polymers 0.000 claims description 6
- 239000011435 rock Substances 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- 238000003780 insertion Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 3
- 230000006866 deterioration Effects 0.000 abstract description 3
- 230000007774 longterm Effects 0.000 abstract description 3
- 230000003487 anti-permeability effect Effects 0.000 abstract description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- E21D11/04—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
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
- E21D20/021—Grouting with inorganic components, e.g. cement
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Inorganic Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Lining And Supports For Tunnels (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention belongs to the field of tunnel repair, in particular to a concrete anti-permeability method for repairing water leakage of a tunnel, aiming at the problems that the existing tunnel is easy to generate water leakage at positions such as a building crack, a construction joint and the like, and the lining deterioration is aggravated due to long-term water leakage, such as the lining crack is enlarged, the lining is corroded and peeled off, and even blocks fall off, the invention provides the following scheme, which comprises S1, investigating the water leakage condition, finding out the water source, the water leakage position and the water leakage quantity, and judging whether the water leakage position is in the water leakage state or in the crack state or the non-water leakage state And (3) processing measures of polymer modified cement-based repair mortar, grouting and carbon fiber cloth pasting reinforcement.
Description
Technical Field
The invention relates to the technical field of tunnel repair, in particular to a concrete anti-permeability method for repairing tunnel leakage water.
Background
The tunnel is an engineering building buried in the stratum, is a form of utilizing underground space by human beings, can be divided into a traffic tunnel, a hydraulic tunnel, a municipal tunnel, a mine tunnel and a military tunnel, and integrates various factors in a tunnel conference held by international economic cooperation and development organization in 1970, and the definition of the tunnel is as follows: "a cavity with a cross section area larger than 2 square meters is built under the ground by any method according to a specified shape and size in a certain application.
The tunnel is easy to generate water leakage at positions such as a village crack, a construction joint and the like, the lining deterioration is aggravated due to long-term water leakage, such as the expansion of a lining crack, the corrosion and the peeling of the lining, even the block dropping, part of the water leakage is collected in a road bed, the tunnel base is softened, and the grout turning and the mud pumping are formed under the repeated action of train load, so that the driving safety is endangered, so that a concrete impermeability method for repairing the tunnel water leakage is provided, and the problems are solved.
Disclosure of Invention
The invention aims to solve the defects that in the prior art, water leakage is easily generated at positions of a tunnel such as a lining crack, a construction joint and the like, and lining deterioration is aggravated due to long-term water leakage, such as lining crack expansion, lining corrosion stripping and even block dropping, partial water leakage in a section is collected in a road bed, a tunnel base is softened, and grout and mud are formed under the repeated action of train load, so that driving safety is endangered, and the concrete anti-seepage method for repairing the tunnel water leakage is provided.
In order to achieve the purpose, the invention adopts the following technical scheme:
a concrete impervious method for repairing tunnel leakage water comprises S1, investigating the leakage water situation, finding out the water source, the leakage position and the leakage water amount, and judging whether the leakage position is in the leakage state or in the state of crack and no leakage;
s2, if the arch part is in a water leakage state, generally aiming at the serious water leakage part (linear or large-area leakage) of the arch part, radial grouting and water plugging are adopted, grouting and drilling are carried out in a quincunx arrangement, the transverse and longitudinal spacing is 1.0-2.0 m, and the adjustment can be specifically carried out according to the field water leakage condition and the grouting effect;
s3, judging the width of the crack if the crack is in a state that water is not leaked;
s31, for the crack with the arch part crack width t less than or equal to 5mm, the crack can be combined with the water leakage disease, and the caulking material is adopted for caulking;
s32, treating the web crack, the crescent crack, the cross crack, the circular crack and the longitudinal, oblique and circumferential cracks with the arch crack width t larger than 5mm, adopting the treatment measures of anchor rod, polymer modified cement-based repair mortar, grouting and carbon fiber cloth pasting for reinforcement, and specifically operating as follows:
s321, constructing a self-advancing grouting anchor rod with the length of 4m and the diameter of 32mm at intervals of about 1m along the longitudinal direction of the crack, wherein the anchor rods are arranged on two sides of the crack in a staggered mode;
s322, chiseling a groove with the width of 5cm and the depth of 5cm along the extension direction of the crack, extending the length of the groove 10cm outwards from the starting point of the crack, and brushing floating dust in the groove with a brush;
s323, checking the depth of the crack, setting 1 grouting steel pipe every 150cm when the depth of the crack is more than 5cm, and not setting the grouting pipe when the depth of the crack is less than 5 cm;
s324, filling polymer modified cement-based repair mortar;
s325, after the polymer modified cement-based repair mortar reaches a certain strength, injecting a reinforced TGRM cement-based special grouting material through a grouting pipe to ensure that the grouting material in the gap is fully communicated, and reserving air holes between the holes, wherein when the grout is reserved in the air outlet, the grout is fully communicated;
s326, after grouting is completed, cutting off the exposed part of the grouting pipe, plugging all grouting holes by using polymer modified cement-based repair mortar, and leveling;
and S327, after the embedding work is finished, adhering a carbon fiber reinforcing layer for reinforcing.
Preferably, the grouting parameters in step S2 are as follows: the diameter of the drilled hole is 50mm, and the grouting pipe is a hot-rolled seamless steel pipe with the outer diameter of 42mm and the thickness of 3.5 mm.
Preferably, the caulking material in the step S31 is one of a modified cement-based mortar and an epoxy resin.
Preferably, the slurry in the step S2 adopts a waterproof TGRM cement-based special grouting material with a water-cement ratio of 0.6: 1.
Preferably, the grouting pressure in the step S2 is 0.4-0.6 MPa, and the grouting diffusion radius is 3 m.
Preferably, the front end of the steel pipe in the step S2 is made into a garden cone shape, a steel bar hoop is welded at the rear end, and quincunx grout is distributed on the pipe body, so that the grouting pipe can be conveniently inserted into the surrounding rock.
Preferably, the water cement ratio of the reinforced TGRM cement-based special grouting material in the step S325 is 0.4: 1.
Preferably, the grouting pressure in step S325 is 0.3MPa to 0.5 MPa.
Preferably, in the step S323, the grouting steel pipe has a diameter of 10mm, a length of 9-11 cm and an exposed pipe length of 2-3 cm.
Compared with the prior art, the invention has the beneficial effects that:
1. the water leakage position can be blocked by adopting radial grouting, so that the water leakage phenomenon of the tunnel is solved;
2. the crack position can be plugged, and the phenomenon of water leakage is avoided.
According to the method, the water leakage phenomenon of the tunnel can be solved by radially grouting and blocking the water leakage position, the position of a crack which does not leak water is blocked, the crack with the arch part crack width t less than or equal to 5mm can be combined with the water leakage disease, caulking treatment is carried out by adopting a caulking material, and for the crack with the arch part crack width t greater than 5mm, treatment measures of adopting an anchor rod and polymer modified cement-based repair mortar, grouting and pasting carbon fiber cloth for reinforcement are adopted.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
Example one
A concrete impervious method for repairing tunnel leakage water comprises S1, investigating the leakage water situation, finding out the water source, the leakage position and the leakage water amount, and judging whether the leakage position is in the leakage state or in the state of crack and no leakage;
s2, if the arch part is in a water leakage state, generally aiming at the linear or large-area leakage of the serious water leakage part of the arch part, radial grouting water shutoff is adopted, grouting and drilling quincunx arrangement is adopted, the transverse and longitudinal spacing is 1.0m, and the adjustment can be specifically carried out according to the field water leakage condition and the grouting effect;
s3, judging the width of the crack if the crack is in a state that water is not leaked;
s31, for the crack with the arch part crack width t less than or equal to 5mm, the crack can be combined with the water leakage disease, and the caulking material is adopted for caulking;
s32, treating the web crack, the crescent crack, the cross crack, the circular crack and the longitudinal, oblique and circumferential cracks with the arch crack width t larger than 5mm, adopting the treatment measures of anchor rod, polymer modified cement-based repair mortar, grouting and carbon fiber cloth pasting for reinforcement, and specifically operating as follows:
s321, constructing a self-advancing grouting anchor rod with the length of 4m and the diameter of 32mm at intervals of about 1m along the longitudinal direction of the crack, wherein the anchor rods are arranged on two sides of the crack in a staggered mode;
s322, chiseling a groove with the width of 5cm and the depth of 5cm along the extension direction of the crack, extending the length of the groove 10cm outwards from the starting point of the crack, and brushing floating dust in the groove with a brush;
s323, checking the depth of the crack, setting 1 grouting steel pipe every 150cm when the depth of the crack is more than 5cm, and not setting the grouting pipe when the depth of the crack is less than 5 cm;
s324, filling polymer modified cement-based repair mortar;
s325, after the polymer modified cement-based repair mortar reaches a certain strength, injecting a reinforced TGRM cement-based special grouting material through a grouting pipe to ensure that the grouting material in the gap is fully communicated, and reserving air holes between the holes, wherein when the grout is reserved in the air outlet, the grout is fully communicated;
s326, after grouting is completed, cutting off the exposed part of the grouting pipe, plugging all grouting holes by using polymer modified cement-based repair mortar, and leveling;
and S327, after the embedding work is finished, adhering a carbon fiber reinforcing layer for reinforcing.
In the present invention, the grouting parameters in step S2 are as follows: the diameter of the drilled hole is 50mm, and the grouting pipe is a hot-rolled seamless steel pipe with the outer diameter of 42mm and the thickness of 3.5 mm.
In the present invention, the caulking material in step S31 is one of a modified cement-based mortar and an epoxy resin.
In the invention, the slurry in the step S2 adopts a waterproof TGRM cement-based special grouting material with the water-cement ratio of 0.6: 1.
In the present invention, the grouting pressure in step S2 is 0.4MPa, and the grouting diffusion radius is 3 m.
In the invention, the front end of the steel pipe in the step S2 is made into a garden cone shape, a reinforcing steel hoop is welded at the rear end, quincunx grout overflow is distributed on the pipe body, and the grouting pipe can be conveniently inserted into surrounding rocks.
In the invention, the water cement ratio of the reinforced TGRM cement-based special grouting material in the step S325 is 0.4: 1.
In the present invention, the grouting pressure in step S325 is 0.3 mpa.
In the invention, in step S323, the diameter of the grouting steel pipe is 10mm, the length is 9cm, and the length of the exposed pipe is 2 cm.
Example two
A concrete impervious method for repairing tunnel leakage water comprises S1, investigating the leakage water situation, finding out the water source, the leakage position and the leakage water amount, and judging whether the leakage position is in the leakage state or in the state of crack and no leakage;
s2, if the arch part is in a water leakage state, generally aiming at the linear or large-area leakage of the serious water leakage part of the arch part, radial grouting water shutoff is adopted, grouting and drilling quincunx arrangement is adopted, the transverse and longitudinal spacing is 1.0m, and the adjustment can be specifically carried out according to the field water leakage condition and the grouting effect;
s3, judging the width of the crack if the crack is in a state that water is not leaked;
s31, for the crack with the arch part crack width t less than or equal to 5mm, the crack can be combined with the water leakage disease, and the caulking material is adopted for caulking;
s32, treating the web crack, the crescent crack, the cross crack, the circular crack and the longitudinal, oblique and circumferential cracks with the arch crack width t larger than 5mm, adopting the treatment measures of anchor rod, polymer modified cement-based repair mortar, grouting and carbon fiber cloth pasting for reinforcement, and specifically operating as follows:
s321, constructing a self-advancing grouting anchor rod with the length of 4m and the diameter of 32mm at intervals of about 1m along the longitudinal direction of the crack, wherein the anchor rods are arranged on two sides of the crack in a staggered mode;
s322, chiseling a groove with the width of 5cm and the depth of 5cm along the extension direction of the crack, extending the length of the groove 10cm outwards from the starting point of the crack, and brushing floating dust in the groove with a brush;
s323, checking the depth of the crack, setting 1 grouting steel pipe every 150cm when the depth of the crack is more than 5cm, and not setting the grouting pipe when the depth of the crack is less than 5 cm;
s324, filling polymer modified cement-based repair mortar;
s325, after the polymer modified cement-based repair mortar reaches a certain strength, injecting a reinforced TGRM cement-based special grouting material through a grouting pipe to ensure that the grouting material in the gap is fully communicated, and reserving air holes between the holes, wherein when the grout is reserved in the air outlet, the grout is fully communicated;
s326, after grouting is completed, cutting off the exposed part of the grouting pipe, plugging all grouting holes by using polymer modified cement-based repair mortar, and leveling;
and S327, after the embedding work is finished, adhering a carbon fiber reinforcing layer for reinforcing.
In the present invention, the grouting parameters in step S2 are as follows: the diameter of the drilled hole is 50mm, and the grouting pipe is a hot-rolled seamless steel pipe with the outer diameter of 42mm and the thickness of 3.5 mm.
In the present invention, the caulking material in step S31 is one of a modified cement-based mortar and an epoxy resin.
In the invention, the slurry in the step S2 adopts a waterproof TGRM cement-based special grouting material with the water-cement ratio of 0.6: 1.
In the present invention, the grouting pressure in step S2 is 0.5MPa, and the grouting diffusion radius is 3 m.
In the invention, the front end of the steel pipe in the step S2 is made into a garden cone shape, a reinforcing steel hoop is welded at the rear end, quincunx grout overflow is distributed on the pipe body, and the grouting pipe can be conveniently inserted into surrounding rocks.
In the invention, the water cement ratio of the reinforced TGRM cement-based special grouting material in the step S325 is 0.4: 1.
In the present invention, the grouting pressure in step S325 is 0.4 MPa.
In the invention, in step S323, the diameter of the grouting steel pipe is 10mm, the length of the grouting steel pipe is 10cm, and the length of the exposed pipe is 2 cm.
EXAMPLE III
A concrete impervious method for repairing tunnel leakage water comprises S1, investigating the leakage water situation, finding out the water source, the leakage position and the leakage water amount, and judging whether the leakage position is in the leakage state or in the state of crack and no leakage;
s2, if the arch part is in a water leakage state, generally aiming at the linear or large-area leakage of the serious water leakage part of the arch part, radial grouting and water shutoff are adopted, grouting and drilling are carried out in a quincunx arrangement, the transverse and longitudinal spacing is 2.0m, and the adjustment can be specifically carried out according to the field water leakage condition and the grouting effect;
s3, judging the width of the crack if the crack is in a state that water is not leaked;
s31, for the crack with the arch part crack width t less than or equal to 5mm, the crack can be combined with the water leakage disease, and the caulking material is adopted for caulking;
s32, treating the web crack, the crescent crack, the cross crack, the circular crack and the longitudinal, oblique and circumferential cracks with the arch crack width t larger than 5mm, adopting the treatment measures of anchor rod, polymer modified cement-based repair mortar, grouting and carbon fiber cloth pasting for reinforcement, and specifically operating as follows:
s321, constructing a self-advancing grouting anchor rod with the length of 4m and the diameter of 32mm at intervals of about 1m along the longitudinal direction of the crack, wherein the anchor rods are arranged on two sides of the crack in a staggered mode;
s322, chiseling a groove with the width of 5cm and the depth of 5cm along the extension direction of the crack, extending the length of the groove 10cm outwards from the starting point of the crack, and brushing floating dust in the groove with a brush;
s323, checking the depth of the crack, setting 1 grouting steel pipe every 150cm when the depth of the crack is more than 5cm, and not setting the grouting pipe when the depth of the crack is less than 5 cm;
s324, filling polymer modified cement-based repair mortar;
s325, after the polymer modified cement-based repair mortar reaches a certain strength, injecting a reinforced TGRM cement-based special grouting material through a grouting pipe to ensure that the grouting material in the gap is fully communicated, and reserving air holes between the holes, wherein when the grout is reserved in the air outlet, the grout is fully communicated;
s326, after grouting is completed, cutting off the exposed part of the grouting pipe, plugging all grouting holes by using polymer modified cement-based repair mortar, and leveling;
and S327, after the embedding work is finished, adhering a carbon fiber reinforcing layer for reinforcing.
In the present invention, the grouting parameters in step S2 are as follows: the diameter of the drilled hole is 50mm, and the grouting pipe is a hot-rolled seamless steel pipe with the outer diameter of 42mm and the thickness of 3.5 mm.
In the present invention, the caulking material in step S31 is one of a modified cement-based mortar and an epoxy resin.
In the invention, the slurry in the step S2 adopts a waterproof TGRM cement-based special grouting material with the water-cement ratio of 0.6: 1.
In the present invention, the grouting pressure in step S2 is 0.6MPa, and the grouting diffusion radius is 3 m.
In the invention, the front end of the steel pipe in the step S2 is made into a garden cone shape, a reinforcing steel hoop is welded at the rear end, quincunx grout overflow is distributed on the pipe body, and the grouting pipe can be conveniently inserted into surrounding rocks.
In the invention, the water cement ratio of the reinforced TGRM cement-based special grouting material in the step S325 is 0.4: 1.
In the present invention, the grouting pressure in step S325 is 0.5 MPa.
In the invention, in step S323, the diameter of the grouting steel pipe is 10mm, the length of the grouting steel pipe is 11cm, and the length of the exposed pipe is 3 cm.
Example four
A concrete impervious method for repairing tunnel leakage water comprises S1, investigating the leakage water situation, finding out the water source, the leakage position and the leakage water amount, and judging whether the leakage position is in the leakage state or in the state of crack and no leakage;
s2, if the arch part is in a water leakage state, generally aiming at the linear or large-area leakage of the serious water leakage part of the arch part, radial grouting and water shutoff are adopted, grouting and drilling are carried out in a quincunx arrangement, the transverse and longitudinal spacing is 2.0m, and the adjustment can be specifically carried out according to the field water leakage condition and the grouting effect;
s3, judging the width of the crack if the crack is in a state that water is not leaked;
s31, for the crack with the arch part crack width t less than or equal to 5mm, the crack can be combined with the water leakage disease, and the caulking material is adopted for caulking;
s32, treating the web crack, the crescent crack, the cross crack, the circular crack and the longitudinal, oblique and circumferential cracks with the arch crack width t larger than 5mm, adopting the treatment measures of anchor rod, polymer modified cement-based repair mortar, grouting and carbon fiber cloth pasting for reinforcement, and specifically operating as follows:
s321, constructing a self-advancing grouting anchor rod with the length of 4m and the diameter of 32mm at intervals of about 1m along the longitudinal direction of the crack, wherein the anchor rods are arranged on two sides of the crack in a staggered mode;
s322, chiseling a groove with the width of 5cm and the depth of 5cm along the extension direction of the crack, extending the length of the groove 10cm outwards from the starting point of the crack, and brushing floating dust in the groove with a brush;
s323, checking the depth of the crack, setting 1 grouting steel pipe every 150cm when the depth of the crack is more than 5cm, and not setting the grouting pipe when the depth of the crack is less than 5 cm;
s324, filling polymer modified cement-based repair mortar;
s325, after the polymer modified cement-based repair mortar reaches a certain strength, injecting a reinforced TGRM cement-based special grouting material through a grouting pipe to ensure that the grouting material in the gap is fully communicated, and reserving air holes between the holes, wherein when the grout is reserved in the air outlet, the grout is fully communicated;
s326, after grouting is completed, cutting off the exposed part of the grouting pipe, plugging all grouting holes by using polymer modified cement-based repair mortar, and leveling;
and S327, after the embedding work is finished, adhering a carbon fiber reinforcing layer for reinforcing.
In the present invention, the grouting parameters in step S2 are as follows: the diameter of the drilled hole is 50mm, and the grouting pipe is a hot-rolled seamless steel pipe with the outer diameter of 42mm and the thickness of 3.5 mm.
In the present invention, the caulking material in step S31 is one of a modified cement-based mortar and an epoxy resin.
In the invention, the slurry in the step S2 adopts a waterproof TGRM cement-based special grouting material with the water-cement ratio of 0.6: 1.
In the present invention, the grouting pressure in step S2 is 0.6MPa, and the grouting diffusion radius is 3 m.
In the invention, the front end of the steel pipe in the step S2 is made into a garden cone shape, a reinforcing steel hoop is welded at the rear end, quincunx grout overflow is distributed on the pipe body, and the grouting pipe can be conveniently inserted into surrounding rocks.
In the invention, the water cement ratio of the reinforced TGRM cement-based special grouting material in the step S325 is 0.4: 1.
In the present invention, the grouting pressure in step S325 is 0.5 MPa.
In the invention, in step S323, the diameter of the grouting steel pipe is 10mm, the length of the grouting steel pipe is 11cm, and the length of the exposed pipe is 2 cm.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.
Claims (9)
1. A concrete impermeability method for repairing tunnel leakage water is characterized by comprising the following steps:
s1, investigating the water leakage situation, finding out the water source, the water leakage position and the water leakage amount, and judging whether the water leakage position is in a water leakage state or in a state that the water leakage position has cracks and is not leaked;
s2, if the arch part is in a water leakage state, generally aiming at the serious water leakage part of the arch part, radial grouting and water shutoff are adopted, and grouting and drilling quincunx arrangement is adopted, wherein the transverse and longitudinal spacing is 1.0-2.0 m, and the adjustment can be specifically carried out according to the field water leakage condition and the grouting effect;
s3, judging the width of the crack if the crack is in a state that water is not leaked;
s31, for the crack with the arch part crack width t less than or equal to 5mm, the crack can be combined with the water leakage disease, and the caulking material is adopted for caulking;
s32, treating the web crack, the crescent crack, the cross crack, the circular crack and the longitudinal, oblique and circumferential cracks with the arch crack width t larger than 5mm, adopting the treatment measures of anchor rod, polymer modified cement-based repair mortar, grouting and carbon fiber cloth pasting for reinforcement, and specifically operating as follows:
s321, constructing a self-advancing grouting anchor rod with the length of 4m and the diameter of 32mm at intervals of about 1m along the longitudinal direction of the crack, wherein the anchor rods are arranged on two sides of the crack in a staggered mode;
s322, chiseling a groove with the width of 5cm and the depth of 5cm along the extension direction of the crack, extending the length of the groove 10cm outwards from the starting point of the crack, and brushing floating dust in the groove with a brush;
s323, checking the depth of the crack, setting 1 grouting steel pipe every 150cm when the depth of the crack is more than 5cm, and not setting the grouting pipe when the depth of the crack is less than 5 cm;
s324, filling polymer modified cement-based repair mortar;
s325, after the polymer modified cement-based repair mortar reaches a certain strength, injecting a reinforced TGRM cement-based special grouting material through a grouting pipe to ensure that the grouting material in the gap is fully communicated, and reserving air holes between the holes, wherein when the grout is reserved in the air outlet, the grout is fully communicated;
s326, after grouting is completed, cutting off the exposed part of the grouting pipe, plugging all grouting holes by using polymer modified cement-based repair mortar, and leveling;
and S327, after the embedding work is finished, adhering a carbon fiber reinforcing layer for reinforcing.
2. The method for concrete impermeability of repairing water leakage through tunnels according to claim 1, wherein the grouting parameters in the step S2 are as follows: the diameter of the drilled hole is 50mm, and the grouting pipe is a hot-rolled seamless steel pipe with the outer diameter of 42mm and the thickness of 3.5 mm.
3. The method of claim 1, wherein the caulking material of the step S31 is one of a modified cement-based mortar and an epoxy resin.
4. The method for concrete impermeability of the repairing water leakage of tunnel according to claim 1, wherein the slurry in step S2 is a waterproof TGRM cement-based special grouting material with a water-cement ratio of 0.6: 1.
5. The concrete impermeability method of claim 1, wherein the grouting pressure in step S2 is 0.4-0.6 MPa, and the grouting diffusion radius is 3 m.
6. The method of claim 1, wherein the front end of the steel pipe in step S2 is made into a cone shape, and the rear end is welded with a steel hoop, and the pipe body is lined with quincunx grout for facilitating the insertion of the grouting pipe into the surrounding rock.
7. The method for concrete impermeability of the repairing water leakage of tunnel according to claim 1, wherein the water cement ratio of the reinforced TGRM cement-based special grouting material in step S325 is 0.4: 1.
8. The method for concrete impermeability of the repairing water leakage of tunnel according to claim 1, wherein the grouting pressure in step S325 is 0.3MPa to 0.5 MPa.
9. The concrete impermeability method of claim 1, wherein the grouting steel pipe of step S323 has a diameter of 10mm, a length of 9-11 cm, and an exposed pipe length of 2-3 cm.
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