CN101871351A - Method for reinforcing and protecting inner surface of tunnel - Google Patents
Method for reinforcing and protecting inner surface of tunnel Download PDFInfo
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- CN101871351A CN101871351A CN201010203023A CN201010203023A CN101871351A CN 101871351 A CN101871351 A CN 101871351A CN 201010203023 A CN201010203023 A CN 201010203023A CN 201010203023 A CN201010203023 A CN 201010203023A CN 101871351 A CN101871351 A CN 101871351A
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- Prior art keywords
- tunnel
- cement
- mortar
- reinforcing
- polypropylene fibre
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00146—Sprayable or pumpable mixtures
- C04B2111/00155—Sprayable, i.e. concrete-like, materials able to be shaped by spraying instead of by casting, e.g. gunite
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00293—Materials impermeable to liquids
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a method for reinforcing and protecting the inner surface of a tunnel. By adding polyacrylate emulsion and polypropylene fibers into cement waterproof mortar, the surface strength of the inner surface of the tunnel is improved and the problems of cracks, water seepage and high-temperature explosive spalling of the inner surface of the tunnel are solved. The method comprises the following steps of: first, preparing the cement waterproof mortar which comprises cement, sand, water and the polyacrylate emulsion in a weight ratio of 1:0.3-0.45:0.5-0.8:0.01-0.015; then, preparing modified cement mortar by fully mixing the polypropylene fibers and the cement waterproof mortar in the weight ratio of 1:0.004-0.005; and finally, jetting the modified cement mortar onto the inner surface of the tunnel of a concrete structure. The polypropylene fibers resist to the contraction stress of the cement in all directions, so that the strength of waterproof mortar after solidified is improved; and an effect of improving fire resistance limit is achieved at the same time.
Description
Technical field
The present invention relates to a kind of means of defence to inner surface of tunnel.
Background technology
In constructing tunnel, waterproof technique is the important step of constructing tunnel.At present, widely used highway tunnel waterproof technique is to hang nonwoven between supporting in the early stage and the secondary lining as drainage blanket and cushion coat, below the nonwoven drainage blanket, splash guard welded together and obtain waterproofing course, its defective is: hanging the nonwoven drainage blanket mostly is manually to hang, splash guard also is by manually being welded into an integral body, efficient is very low, and the labor strength of construction is bigger; The most fatal is, splash guard is broken easily, and the welding quality between splash guard and the splash guard is difficult to guarantee that the percolating water situation appears in weld easily, causes present construction of tunnel percolating water more general that waterproof effect is not very desirable.At present, being used to travel, the tunnel of the vehicles adopts basically all is reinforced concrete structure, but this structure phenomenons such as microcrack, infiltration still often occur with the prolongation inner surface of tunnel of service life, the water that infiltrates causes corrosion harmfulness to the various facilities and equipment in the tunnel, also shorten the application life in tunnel, more be not easy to the current of the vehicles.Inner surface of tunnel is easy to occur phenomenons such as microcrack and infiltration, and the explosion easily under the environment of high temperature of the concrete of inner surface of tunnel, if catch fire in the tunnel, can cause the large tracts of land of body of wall to damage.The patent No. 01107173.7, external insulating mortar of announcing among the notice of authorization CN1139551C and preparation method, its mortar is made up of cement, acrylic emulsion, polystyrene foam particles, polypropylene fibre and water.Wherein polystyrene is a foam beads in the prior art, only solved the affinity of inorganic coagulation material and polystyrene foam particles, the Yi Xinghao of external insulating mortar, adhesion strength height, the performance of thermal insulation is preferably arranged, but can not solve crack, infiltration and the high temperature explosion problem of tunnel surface.Patent No. CN100535393 discloses a kind of method for reinforcing and protecting, it is the crack that utilizes the mode of doping polyacrylic acid emulsion in the cement and polypropylene fibre to solve inner surface of tunnel, infiltration and high temperature explosion problem, it is simple that this method has step, the advantage of with low cost and reliable operation, help promoting in practice, the present inventor is when this method of use, find to use polymethylacrylic acid emulsion such as α-polymethylacrylic acid emulsion and β-polymethylacrylic acid emulsion to replace the polyacrylic acid emulsion if be not intended to, and each ratio of component of adjusting cement waterproofing mortar, finally can play better effect.
Summary of the invention:
The purpose of this invention is to provide a kind of method for reinforcing and protecting inner surface of tunnel.
Patent CN100535393 all introduces also for referencial use at this.
The objective of the invention is to transform on the basis of existing technology, a kind of method for reinforcing and protecting of inner surface of tunnel is provided, easy to use, under moist basal plane, cryogenic conditions, all can construct.By replacing the polyacrylic acid emulsion with the polymethylacrylic acid emulsion, can better strengthen the surface strength of inner surface of tunnel, solve the waterproof, protection against the tide of inner surface of tunnel, antifreeze, anti-impact mill, corrosion-resistant crack, infiltration and high temperature explosion problem.
The objective of the invention is to realize by following method.
Technical scheme of the present invention comprises the steps:
Step 1, preparation cement waterproofing mortar, cement waterproofing mortar is fully mixed by following components in part by weight, cement: sand: water: polymethylacrylic acid emulsion=1: 0.3～0.45: 0.5～0.8: 0.01～0.015;
Step 2, by cement waterproofing mortar: the weight ratio of polypropylene fibre=1: 0.004～0.005 fully is mixed into polypropylene fibre in cement waterproofing mortar, make modified cement mortar, and the length of polypropylene fibre is 6～15 millimeters;
Step 3, modified cement mortar is ejected on the inner surface in tunnel of concrete structure, modified cement mortar solidifies the reinforcement protected working of just having finished inner surface of tunnel by the time.
Owing to taked method of the present invention to be provided with topping on the inner surface of tunnel; polypropylene fibre is resisting the stress that cement shrinks on all directions; therefore greatly reduced the possibility of cement cracking; also improved the intensity after waterproofing mortar solidifies, the polymethylacrylic acid emulsion reduces the possibility of tunnel wall infiltration as cementing agent and waterproof agent simultaneously.And,, can melt after being heated because polypropylene fibre and polymethylacrylic acid emulsion all are organic matters, make the tiny pore that gathers in the tunnel body of wall after fusing is flowed out, if catch fire, the gas that expands behind the high temperature in the body of wall is overflowed from pore, high pressure can be do not produced, therefore just the body of wall explosion can not be made yet.Method of the present invention has the advantage of simple, the with low cost and reliable operation of step, has bigger promotional value.It both can be used for having occurred the reinforcement in the tunnel in crack, the finish protective treatment in advance in tunnel that the crack also do not occur that also can being used for has just constructed.With the polymethylacrylic acid emulsion replace the polyacrylic acid emulsion final better protecting effect, but cause the concrete mechanism of this effect still unclear now.
The specific embodiment
The invention will be further described below by embodiment.It should be understood that the described preparation method of the embodiment of the invention is only used for illustrating the present invention, rather than limitation of the present invention, the simple modifications to preparation method of the present invention under design prerequisite of the present invention all belongs to the scope of protection of present invention.
Embodiment 1:
Step 1: the preparation cement waterproofing mortar, cement waterproofing mortar is fully mixed by following components in part by weight, cement: sand: water: α-polymethylacrylic acid emulsion=1: 0.35: 0.7: 0.01;
Step 2: by cement waterproofing mortar: the weight ratio of polypropylene fibre=1: 0.0045 fully is mixed into polypropylene fibre in cement waterproofing mortar, make modified cement mortar, the length of polypropylene fibre is 6～15 millimeters, and the diameter of polypropylene fibre is 5～10 microns;
Step 3: modified cement mortar is ejected on the inner surface in tunnel of concrete structure, modified cement mortar solidifies the reinforcement protected working of just having finished inner surface of tunnel by the time.Cement is selected the P.032.5 product of model for use, and sand selects for use granularity less than 4.75 millimeters, the medium sand of fineness modulus 2.4～2.9.
Embodiment 2:
Step 1: the preparation cement waterproofing mortar, cement waterproofing mortar is fully mixed by following components in part by weight, cement: sand: water: β-polymethylacrylic acid emulsion=1: 0.45: 0.6: 0.013;
Step 2: by cement waterproofing mortar: the weight ratio of polypropylene fibre=1: 0.0045 fully is mixed into polypropylene fibre in cement waterproofing mortar, make modified cement mortar, the length of polypropylene fibre is 6～15 millimeters, and the diameter of polypropylene fibre is 5～10 microns;
Step 3: modified cement mortar is ejected on the inner surface in tunnel of concrete structure, modified cement mortar solidifies the reinforcement protected working of just having finished inner surface of tunnel by the time.Cement is selected the P.032.5 product of model for use, and sand selects for use granularity less than 4.75 millimeters, the medium sand of fineness modulus 2.4～2.9.
Embodiment 3:
Also carry out following steps in the foregoing description 1 and 2 before the implementation step one: cover and the fixed grating aperture plate on the inner surface in tunnel, the composite material that latticed grid is made up of carbon fiber and epoxy resin is made.Other step is identical with embodiment one.Latticed grid is equivalent to the skeleton of modified cement mortar, has improved the intensity of being solidified the formed topping in back by modified cement mortar.Electric fixtures in the tunnel can produce stray electrical current when operation in addition, and stray electrical current is more serious to the electrochemical corrosion of the various metallic network of pipelines in agent structure reinforcing bar and the certain limit in the tunnel, causes certain harm.On the inner surface in tunnel, cover the grid that contains carbon fiber; form a full-shield systems for providing electrostatic discharge protection; can effectively prevent the outside disperse of stray electrical current; interior hardware of tunnel wall and the metal pipe line in the tunnel have been protected; it will be appreciated by persons skilled in the art that grid is fixed on the inner surface in tunnel by steel nail.Grid is a carbon fiber by volume ratio: epoxy resin=30～35: 100 component is formed, and epoxy resin is as matrix material, and carbon fiber fully is blended in to solidify in the epoxy resin and forms grid.Carbon fiber can be selected the product or the homemade same based carbon fiber of the T700 model of toray company for use, and it is the product of E54 that epoxy resin is selected model for use.The width of mesh of grid is B * C=100 millimeter * 100 millimeter or design voluntarily as required.
Embodiment 4:(adopts the situation of polyacrylic acid emulsion)
Step 1: the preparation cement waterproofing mortar, cement waterproofing mortar is fully mixed by following components in part by weight, cement: sand: water: polyacrylic acid emulsion=1: 0.6: 0.5: 0.007;
Step 2: by cement waterproofing mortar: the weight ratio of polypropylene fibre=1: 0.007 fully is mixed into polypropylene fibre in cement waterproofing mortar, make modified cement mortar, the length of polypropylene fibre is 6～15 millimeters, and the diameter of polypropylene fibre is 5～10 microns;
Step 3: modified cement mortar is ejected on the inner surface in tunnel of concrete structure, modified cement mortar solidifies the reinforcement protected working of just having finished inner surface of tunnel by the time.Cement is selected the P.032.5 product of model for use, and sand selects for use granularity less than 4.75 millimeters, the medium sand of fineness modulus 2.4～2.9.
Comparing embodiment 5:
Carry out inner surface of tunnel reinforcement protection according to embodiment 1, embodiment 2, embodiment 4 described methods respectively, record various experimental datas following (heat resistance is measured) then respectively under 100 ℃ of water test condition:
| Project name | Time of setting | Adhesion strength (MPa) | Anti-permeability strength (MPa) | Acid resistance (360h) | Alkali resistance (360h) | Freexing tolerance (20 times) | Moisture-proof (720h) | Water resistance (720h) | Heat resistance (coating layer thickness 20mm) |
| Embodiment 1 | ??≤24 | ??28d≥??2.5 | ??28d≥??2.9 | Do not have cracking, peel off | Do not have cracking, peel off | Do not have cracking, peel off | There is not cracking, aliquation | There is not cracking, aliquation | There was not cracking in 10 hours |
| Embodiment 2 | ??≤24 | ??28d≥??2.9 | ??28d≥??3.0 | Do not have cracking, peel off | Do not have cracking, peel off | Do not have cracking, peel off | There is not cracking, aliquation | There is not cracking, aliquation | There was not cracking in 11 hours |
| Project name | Time of setting | Adhesion strength (MPa) | Anti-permeability strength (MPa) | Acid resistance (360h) | Alkali resistance (360h) | Freexing tolerance (20 times) | Moisture-proof (720h) | Water resistance (720h) | Heat resistance (coating layer thickness 20mm) |
| Embodiment 4 | ??≤24 | ??28d≥??1.2 | ??28d≥??1.5 | Do not have cracking, peel off | Do not have cracking, peel off | Do not have cracking, peel off | There is not cracking, aliquation | Aliquation | There was not cracking in 5 hours |
The inner surface of tunnel that utilizes the method for embodiment 1 and 2 to carry out as can be seen by the data of last table protects than the inner surface of tunnel that utilizes embodiment 4 means of defences to obtain, have significant advantage aspect adhesion strength, anti-permeability strength, the heat resistance, reaching the purpose of water proof anti-seepage, cracking resistance, increase resistance to compression, adhesion strength.Therefore, the reinforcement in tunnel of the present invention protection can be applied on the building in similar tunnel, for example on the bodies of wall such as subway station, underground pedestrian walk, underground store and underground parking, can efficiently intercept external damp and hot infringement, the safety of protection body of wall.
Claims (5)
1. method for reinforcing and protecting inner surface of tunnel, it is characterized in that: modified cement mortar is ejected on the inner surface in tunnel of concrete structure, by the time modified cement mortar solidifies and can finish, described modified cement mortar comprises cement waterproofing mortar, the configuration of cement waterproofing mortar is fully mixed by following components in part by weight, cement: sand: water: polymethylacrylic acid emulsion=1: 0.3～0.45: 0.5～0.8: 0.01～0.015, and by cement waterproofing mortar: the weight ratio of polypropylene fibre=1: 0.004～0.005 fully is mixed into polypropylene fibre in cement waterproofing mortar, make modified cement mortar, the length of polypropylene fibre is 6～15 millimeters.
2. method for reinforcing and protecting inner surface of tunnel according to claim 1 is characterized in that: described polymethylacrylic acid emulsion is at least a in α-polymethylacrylic acid emulsion and the β-polymethylacrylic acid emulsion.
3. method for reinforcing and protecting inner surface of tunnel according to claim 1 is characterized in that: cover and the fixed grating aperture plate on the inner surface in described tunnel, the composite material that latticed grid is made up of carbon fiber and epoxy resin is made.
4. method for reinforcing and protecting inner surface of tunnel according to claim 3, it is characterized in that: grid is a carbon fiber by volume ratio: epoxy resin=30～35: 100 component is formed, epoxy resin is as matrix material, and carbon fiber fully is blended in the epoxy resin and solidifies.
5. method for reinforcing and protecting inner surface of tunnel according to claim 1 is characterized in that: the diameter of polypropylene fibre is 5～10 microns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102030234A CN101871351B (en) | 2010-06-18 | 2010-06-18 | Method for reinforcing and protecting inner surface of tunnel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102030234A CN101871351B (en) | 2010-06-18 | 2010-06-18 | Method for reinforcing and protecting inner surface of tunnel |
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| Publication Number | Publication Date |
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| CN101871351A true CN101871351A (en) | 2010-10-27 |
| CN101871351B CN101871351B (en) | 2012-08-22 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661171A (en) * | 2012-05-02 | 2012-09-12 | 中铁十一局集团第五工程有限公司 | Frost damage prevention drainage system for tunnel |
| CN102661154A (en) * | 2012-05-14 | 2012-09-12 | 云南农业大学 | Double-layer structural concrete for lining tunnel under condition of terrestrial heat erosion and construction method of double-layer structural concrete |
| CN106145817A (en) * | 2016-06-27 | 2016-11-23 | 浙江共创建材科技有限公司 | A kind of strong waterproof reinforced dedicated modified epoxy emulsion mortar of back side superelevation |
| CN106767515A (en) * | 2017-01-09 | 2017-05-31 | 重庆大学 | A kind of tunnel defect quick diagnosis prevention and controls |
| CN107601993A (en) * | 2017-09-14 | 2018-01-19 | 温州隆盛市政建设有限公司 | A kind of inner surface of tunnel supporting material and preparation method and reinforcement |
| CN108218352A (en) * | 2018-03-23 | 2018-06-29 | 四川汇源钢建装配建筑有限公司 | Cement polymer coating and wall are squeegeeed method |
| CN108316942A (en) * | 2018-01-11 | 2018-07-24 | 中交路桥建设有限公司 | A kind of tunnel double-lining microcrack reinforcement |
| CN111945897A (en) * | 2020-08-19 | 2020-11-17 | 北京中房国建地下防水工程顾问有限公司 | Wall embedded part waterproof structure and construction method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014094183A1 (en) * | 2012-12-21 | 2014-06-26 | Empa Eidgenössische Materialprüfungs- Und Forschungsanstalt | Fire resistant concrete |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1730908A (en) * | 2005-08-19 | 2006-02-08 | 哈尔滨工业大学 | Reinforcement protection method for inner surface of tunnel |
-
2010
- 2010-06-18 CN CN2010102030234A patent/CN101871351B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1730908A (en) * | 2005-08-19 | 2006-02-08 | 哈尔滨工业大学 | Reinforcement protection method for inner surface of tunnel |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661171A (en) * | 2012-05-02 | 2012-09-12 | 中铁十一局集团第五工程有限公司 | Frost damage prevention drainage system for tunnel |
| CN102661171B (en) * | 2012-05-02 | 2014-09-24 | 中铁十一局集团第五工程有限公司 | Frost damage prevention drainage system for tunnel |
| CN102661154A (en) * | 2012-05-14 | 2012-09-12 | 云南农业大学 | Double-layer structural concrete for lining tunnel under condition of terrestrial heat erosion and construction method of double-layer structural concrete |
| CN106145817A (en) * | 2016-06-27 | 2016-11-23 | 浙江共创建材科技有限公司 | A kind of strong waterproof reinforced dedicated modified epoxy emulsion mortar of back side superelevation |
| CN106767515A (en) * | 2017-01-09 | 2017-05-31 | 重庆大学 | A kind of tunnel defect quick diagnosis prevention and controls |
| CN107601993A (en) * | 2017-09-14 | 2018-01-19 | 温州隆盛市政建设有限公司 | A kind of inner surface of tunnel supporting material and preparation method and reinforcement |
| CN107601993B (en) * | 2017-09-14 | 2020-11-03 | 温州隆盛市政建设有限公司 | Tunnel inner surface reinforcing material, preparation method and reinforcing method |
| CN108316942A (en) * | 2018-01-11 | 2018-07-24 | 中交路桥建设有限公司 | A kind of tunnel double-lining microcrack reinforcement |
| CN108218352A (en) * | 2018-03-23 | 2018-06-29 | 四川汇源钢建装配建筑有限公司 | Cement polymer coating and wall are squeegeeed method |
| CN111945897A (en) * | 2020-08-19 | 2020-11-17 | 北京中房国建地下防水工程顾问有限公司 | Wall embedded part waterproof structure and construction method thereof |
| CN111945897B (en) * | 2020-08-19 | 2022-03-29 | 北京中房国建地下防水工程顾问有限公司 | Wall embedded part waterproof structure and construction method thereof |
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| Publication number | Publication date |
|---|---|
| CN101871351B (en) | 2012-08-22 |
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