CN115594788B - Grouting material for waterproof of upstream surface of tunnel lining and grouting method thereof - Google Patents
Grouting material for waterproof of upstream surface of tunnel lining and grouting method thereof Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 99
- 238000011144 upstream manufacturing Methods 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 107
- 230000005684 electric field Effects 0.000 claims abstract description 37
- 239000012966 redox initiator Substances 0.000 claims abstract description 22
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 7
- 239000007800 oxidant agent Substances 0.000 claims abstract description 7
- 230000001590 oxidative effect Effects 0.000 claims abstract description 5
- 230000026058 directional locomotion Effects 0.000 claims abstract description 3
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 24
- 230000009471 action Effects 0.000 claims description 19
- 238000004078 waterproofing Methods 0.000 claims description 14
- 239000012466 permeate Substances 0.000 claims description 13
- 238000010526 radical polymerization reaction Methods 0.000 claims description 13
- 239000000700 radioactive tracer Substances 0.000 claims description 13
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical group CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 claims description 12
- 238000005553 drilling Methods 0.000 claims description 12
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 claims description 12
- 235000010265 sodium sulphite Nutrition 0.000 claims description 12
- DWLAVVBOGOXHNH-UHFFFAOYSA-L magnesium;prop-2-enoate Chemical compound [Mg+2].[O-]C(=O)C=C.[O-]C(=O)C=C DWLAVVBOGOXHNH-UHFFFAOYSA-L 0.000 claims description 11
- 238000004140 cleaning Methods 0.000 claims description 10
- 238000005370 electroosmosis Methods 0.000 claims description 10
- 239000000178 monomer Substances 0.000 claims description 10
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical group OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 claims description 6
- 239000003431 cross linking reagent Substances 0.000 claims description 5
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 4
- PQUXFUBNSYCQAL-UHFFFAOYSA-N 1-(2,3-difluorophenyl)ethanone Chemical compound CC(=O)C1=CC=CC(F)=C1F PQUXFUBNSYCQAL-UHFFFAOYSA-N 0.000 claims description 2
- FRIBMENBGGCKPD-UHFFFAOYSA-N 3-(2,3-dimethoxyphenyl)prop-2-enal Chemical compound COC1=CC=CC(C=CC=O)=C1OC FRIBMENBGGCKPD-UHFFFAOYSA-N 0.000 claims description 2
- CNCOEDDPFOAUMB-UHFFFAOYSA-N N-Methylolacrylamide Chemical compound OCNC(=O)C=C CNCOEDDPFOAUMB-UHFFFAOYSA-N 0.000 claims description 2
- TXTCTCUXLQYGLA-UHFFFAOYSA-L calcium;prop-2-enoate Chemical compound [Ca+2].[O-]C(=O)C=C.[O-]C(=O)C=C TXTCTCUXLQYGLA-UHFFFAOYSA-L 0.000 claims description 2
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 claims description 2
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 2
- 229940047670 sodium acrylate Drugs 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical compound C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 16
- 230000002195 synergetic effect Effects 0.000 abstract description 10
- 230000002093 peripheral effect Effects 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 150
- 238000012360 testing method Methods 0.000 description 49
- 230000000052 comparative effect Effects 0.000 description 11
- 230000000694 effects Effects 0.000 description 11
- 239000002002 slurry Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 6
- 239000011148 porous material Substances 0.000 description 6
- 230000035699 permeability Effects 0.000 description 4
- 238000006116 polymerization reaction Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- SFPNZPQIIAJXGL-UHFFFAOYSA-N 2-ethoxyethyl 2-methylprop-2-enoate Chemical compound CCOCCOC(=O)C(C)=C SFPNZPQIIAJXGL-UHFFFAOYSA-N 0.000 description 1
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000002730 additional effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/04—Acids; Metal salts or ammonium salts thereof
- C08F220/06—Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/20—Esters of polyhydric alcohols or phenols, e.g. 2-hydroxyethyl (meth)acrylate or glycerol mono-(meth)acrylate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F4/00—Polymerisation catalysts
- C08F4/40—Redox systems
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Materials Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to the field of tunnel waterproof materials, in particular to a grouting material for waterproof of a water facing surface of a tunnel lining and a grouting method thereof, and the grouting material has the following technical points: the grouting material consists of a solution A and a solution B; the grouting material also comprises a redox initiation system, wherein the redox initiation system consists of an oxidant in the solution A and a reducing agent in the solution B, and the half life period of the redox initiation system is longer than the grouting time of the grouting material; the solution A and the solution B are also charged, so that the solution A and the solution B generate directional movement when being subjected to electric field force. The grouting material provided by the invention consists of the charged solution A and the charged solution B, and the charged grouting liquid can effectively migrate to micro-gaps and capillary channels in the concrete lining to be filled under the synergistic effect of grouting pressure and electric field force, and can be gathered in the peripheral area of the cathode at the upstream surface side, so that a compact waterproof layer is formed on the upstream surface.
Description
Technical Field
The invention relates to the field of tunnel waterproof materials, in particular to a grouting material for waterproof of a water facing surface of a tunnel lining and a grouting method thereof.
Background
Along with the continuous development of modern construction in China, the demands on infrastructure such as highway bridges, railway tunnels and the like are increasing, water seepage problems are inevitably caused in construction or operation periods of the engineering, cracks of a concrete structure are one of reasons for the water seepage problems, once the cracks develop, water sources are arranged on the water facing surface, water can infiltrate through the cracks, and grouting is one of important ways for solving the water seepage problems.
In the prior art, mechanical pressure grouting is the most commonly used grouting method, but the grouting effect of single pressure grouting is not easy to control, the grouting pressure is too large to cause reverse grouting, so that grouting is uneven, the concrete structure is seriously stressed to deform to endanger the structural safety, pipelines are blocked if the grouting pressure is too small, and grouting is difficult to reach micro-cracks and capillary channels in the concrete structure no matter the grouting pressure is high.
Meanwhile, when a water source exists on the water facing surface of the concrete structure, the water-proof repair is difficult to directly carry out on the water facing surface, so that the water content in the structure is high, and the slurry is easy to break up during grouting. Therefore, under the construction condition that the water facing surface is rich in water, a good controllable grouting effect is achieved by using smaller grouting pressure, meanwhile, the water facing surface can be reinforced from the inside of the concrete, and the problem that most of walls are not corroded by water is needed to be solved at present.
In view of the defects in the prior art, the inventor performs research and innovation based on years of rich experience and professional knowledge of the materials and is matched with theoretical analysis, and develops a grouting material for waterproofing a tunnel lining upstream surface and a grouting method thereof.
Disclosure of Invention
The invention aims to provide a grouting material for waterproofing a water-facing surface of a tunnel lining, which can directionally move through charges carried by the grouting material under the additional action of electric field force, migrate in breeze and capillary holes in the concrete lining under the synergistic action of low-pressure grouting pressure, and fill the breeze and the capillary holes, so that a compact waterproof layer is formed in the outermost layer area of the water-facing surface.
The technical aim of the invention is realized by the following technical scheme:
The invention provides a grouting material for waterproofing a tunnel lining upstream surface, which consists of a solution A and a solution B; the grouting material also comprises a redox initiation system, wherein the redox initiation system consists of an oxidant in solution A and a reducing agent in solution B, and the half life period of the redox initiation system is longer than the grouting time of the grouting material;
the solution A and the solution B are also charged, so that the solution A and the solution B generate directional movement when being subjected to electric field force.
In the invention, the charges of the solution A and the solution B can be the same kind of charges or different kinds of charges, and the kinds of charges mainly depend on how the positive electrode and the negative electrode are arranged. When the system is electrified, electric field force is generated, the charged solution A and the charged solution B reach micro-gaps and capillary holes of the upstream surface of the concrete lining under the combined action of the electric field force and grouting pressure, and then polymerization reaction is carried out under the action of an oxygen reduction initiation system, so that a compact waterproof layer is formed on the outermost layer of the upstream surface.
Further, the volume ratio of the solution A to the solution B is 1:1.
Further, in the invention, the initiation half-life of the redox initiation system is 40-120 min, the whole grouting time is 25-90 min, and proper half-life is selected to be longer than the whole grouting time, so that the grouting material can be ensured not to have polymerization reaction before reaching the outermost layer region of the upstream surface.
Further, the solution A comprises the following components in parts by weight: 40-50 parts of monomer a, 10-15 parts of cross-linking agent and 1-5 parts of oxidant.
Further, the solution B comprises the following components in parts by weight: 80-100 parts of water, 30-40 parts of monomer b, 5 parts of fluorescent tracer and 1-5 parts of reducer. The fluorescent tracer can conveniently observe the penetration distance and uniformity of the grouting slurry in the concrete structure.
Further, the monomer a is any one of sodium acrylate, calcium acrylate or methyl acrylate.
Further, the monomer b is any one of acrylamide, 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate or ethoxyethyl methacrylate. The monomer b can be polymerized with the monomer a to form a branched chain, so that the flexibility and the tensile strength of the grouting material can be improved.
Further, the cross-linking agent is one or more of N-N' -methylenebisacrylamide, vinyltrimethoxysilane, N-methylolacrylamide, 2-hydroxyethyl acrylate or ethylene glycol acrylate. The cross-linking agent selected by the invention can cross-link linear molecules into a three-dimensional network structure, thereby improving the strength and elasticity of the gel.
Further, the oxidizing agent is any one of persulfate, hydrogen peroxide, or cumene hydroperoxide.
Further, the reducing agent is any one of sodium sulfite and ferrous salt.
In the invention, after the solution A and the solution B are mixed, free radical polymerization reaction is carried out under a redox system to form gel, micro-gaps and capillary holes in the concrete lining are filled, and a compact waterproof layer is formed in an electrode area embedded in the outermost layer of the upstream surface.
Further, the electric field force is formed by an electric potential gradient applied between an electrode plate on the surface of the concrete and an embedded electrode in the tunnel concrete lining, and the electric potential gradient is 50V/m-333V/m.
The second object of the invention is to provide a grouting method of grouting material for waterproof of the upstream surface of the tunnel lining, which can still enable the grouting material to reach micro-cracks and pores of the upstream surface of the tunnel concrete lining and then generate polymerization reaction under the condition of adopting lower grouting pressure through the synergistic effect of electric field force and grouting pressure, so as to form a compact waterproof layer on the upstream surface.
The technical aim of the invention is realized by the following technical scheme:
The invention provides a grouting method of grouting material for waterproof of a tunnel lining upstream surface, which comprises the following operation steps: arranging an electrode plate 1 on the back surface of the concrete lining; pre-burying an electrode plate 2 on the upstream surface of the concrete lining; the electrode plate 1 is connected with the negative electrode of the power supply, the electrode plate 2 is connected with the positive electrode of the power supply, and the power is supplied; switching positive and negative power supplies of the electrode plates 1 and 2; and alternately injecting the solution A and the solution B into the concrete lining until grouting is completed.
Further, the interval time between the alternate injection of the solution A and the solution B is 5-10 s.
Further, the grouting method provided by the invention comprises the following specific operations:
step 1, arranging an electrode plate 1 on the back surface of a tunnel concrete lining, wherein the electrode plate is connected with a negative electrode of a direct current power supply as a cathode, and an embedded electrode 2 at the position of the back surface is connected with a positive electrode of the power supply as an anode;
step 2, a direct current power supply is started to electrify the electrode plate and the reserved electrode, water in the concrete lining is collected in a cathode area and then discharged through cracks on the back surface of the lining;
And 3, replacing the anode and the cathode at the moment, wherein the electrode plate 1 is connected with the anode of a direct current power supply and the embedded electrode 2 is connected with the cathode of the power supply.
Step 4, cleaning water stains discharged from the surface of the concrete lining, and drilling holes which are used as grouting holes and are avoided from the electrode 2 on the back surface of the concrete lining, wherein grouting and electroosmosis are synchronously performed after the setting is completed;
Step 5, dividing the solution A and the solution B into a plurality of parts, alternately injecting the solution A and the solution B under the combined action of grouting pressure and electric field force to enable the solution A and the solution B to respectively reach cracks in a concrete lining in sequence, and after grouting the solution A or the solution B for 5-10 seconds, allowing the other solution to permeate;
Step 6, after the whole grouting is completed, mixing the solution A and the solution B in a target area, and carrying out free radical polymerization reaction under a redox initiation system with half-life of 40-120 min to form gel, and uniformly filling micro-gaps and capillary channels in a concrete lining structure to form preliminary grouting water resistance;
and 7, when the preliminary grouting waterproof is formed, the solution A and the solution B are mixed and reacted in the embedded electrode area of the outermost layer of the upstream surface under the action of electric field force, and a compact waterproof layer is formed in the area.
In the present invention, the sequence of the part A solution-part B solution-part A solution-part B solution or the sequence of the part B solution-part A solution-part B solution-part A solution is as follows; the sequence can avoid uneven mixing of the solution A and the solution B in the micro-cracks or pores to influence the polymerization reaction on one hand and ensure that the solution A and the solution B smoothly react under the planned half-life on the other hand because the micro-cracks and the pores are smaller.
Further, the grouting pressure is 0.05-0.1 MPa.
Further, the potential gradient between the electrode plate 1 and the electrode 2 is 50V/m to 333V/m.
In the invention, the potential gradient is the quotient of voltage and electrode distance, and is selected according to the thickness of concrete lining, capillary condition, crack condition, half life period of material and migration speed of liquid under the action of electric field force in general engineering, the required grouting speed is calculated, and the required potential gradient range is calculated according to the grouting speed.
The grouting slurry firstly reaches the larger cracks of the concrete under the action of the grouting pressure and the electric field force, and when the micro-cracks and the capillary channels are encountered, the grouting pressure does not act, and the grouting slurry is mainly pushed to migrate to the designated position by the electric field force.
In summary, the invention has the following beneficial effects:
1. The grouting material provided by the invention consists of the charged solution A and the charged solution B, and the charged grouting liquid can effectively migrate to micro-gaps and capillary channels in the concrete lining to be filled under the synergistic effect of grouting pressure and electric field force, and can be gathered in the peripheral area of the cathode at the upstream surface side, so that a compact waterproof layer is formed on the upstream surface.
2. According to the invention, the solution A and the solution B alternately permeate into the target grouting area according to a certain frequency under the action of electric field force and grouting pressure, the whole grouting time is 25-90 min through the introduction of a redox system with half-life of 40-120 min, and the proper half-life is selected to be longer than the whole grouting time, so that the grouting material is ensured to react again after reaching the target area.
3. Before grouting, the water in the concrete lining structure is electrified and continuously migrated to the cathode region under the action of electric field force, so that the water in the structure is discharged, the flushing dilution of the grouting material by the water is reduced, and a grouting channel is provided for subsequent grouting.
4. Under the synergistic effect of the electric field force and the low-pressure grouting pressure, the charged grouting material can effectively reach a target area, and meanwhile, the magnitude of the potential gradient can be adjusted according to the thickness of the concrete lining, capillary hole conditions, crack conditions and the like, so that the electric field force is changed, the grouting speed is controlled, and the grouting quality is ensured.
Drawings
In order to more clearly illustrate the embodiments or advantages of the present invention, the drawings that are required to be used in the description of the embodiments or advantages will be briefly described below, it being apparent that the drawings in the following description are only some of the embodiments described in the present invention, and other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic diagram of grouting effect under the synergistic effect of electric field force and mechanical grouting pressure;
Fig. 2 is a schematic diagram of grouting effect under single mechanical grouting pressure.
Reference numerals: 1. a water source; 2. a water-facing surface; 3. an electrode 2; 4. electric field lines; 5. an electrode plate 1; 6. mechanical grouting pressure; 7. a waterproof layer; 8. and (5) injecting slurry in a charged manner.
Detailed Description
In order to further explain the technical means and effects adopted by the invention to achieve the preset aim, the concrete implementation mode, the characteristics and the effects of the grouting material for the waterproof of the upstream surface of the tunnel lining and the grouting method thereof are described in detail below.
Example 1: grouting material for waterproof of upstream surface of tunnel lining and grouting method thereof
The grouting material for waterproofing the upstream surface of the tunnel lining provided by the embodiment comprises a solution A and a solution B; wherein, the solution A comprises the following components in parts by weight: 100 parts of water, 40 parts of magnesium acrylate, 10 parts of N-N' -methylenebisacrylamide and 5 parts of persulfate; the solution B comprises: 100 parts of water, 40 parts of 2-hydroxyethyl methacrylate, 5 parts of sodium sulfite and 5 parts of fluorescent tracer.
The material properties of the grouting material provided in this example are shown in table 1.
TABLE 1 Material Properties of the grouting Material of EXAMPLE 1
As shown in fig. 1, the grouting method of the grouting material provided in this embodiment is as follows:
Step 1, preparing a concrete test piece, wherein one surface is used as a back surface, and the other surface is used as a water facing surface; pre-burying an electrode at the upstream surface and immersing for 1h to simulate the water-rich condition of the upstream surface; an electrode plate 1 is arranged on the back surface, the electrode plate 1 is connected with the negative electrode of a direct current power supply to serve as a cathode, and an electrode 2 pre-buried at the position of the back surface is connected with the positive electrode of the power supply to serve as an anode;
Step 2, a direct current power supply is started to electrify the electrode plate 1 and the reserved electrode 2, water in the concrete is collected in a cathode area and is discharged from a back water surface crack;
Step 3, the position of the cathode and the anode is changed at the moment, the electrode plate 1 is connected with the anode of a direct current power supply and is used as an anode, and the reserved electrode 2 is connected with the cathode of the power supply and is used as a cathode;
Step 4, cleaning water stains discharged from the surface of the concrete, drilling holes on the back surface of the concrete as grouting holes, setting the potential gradient to be 50V/m, setting the grouting pressure to be 0.05Mpa, and synchronously performing grouting and electroosmosis;
Step 5, firstly injecting part A solution, after 5s of interval, then injecting part B solution, after 5s of interval, then injecting part A solution, and circulating in such a way, and under the combined action of grouting pressure and electric field force, enabling each part A solution and each part B solution to sequentially permeate into micro-cracks and capillary channels of the concrete lining;
and 6, repeating the step 5 until all grouting is completed, mixing the solution A and the solution B in a target area, carrying out free radical polymerization reaction under a redox initiation system with a half-life period of 70min, and finally forming a compact waterproof layer in a cathode area, which is close to the upstream surface of the concrete lining.
After the steps 1-6 are completed, the water seepage coefficient, the air seepage coefficient, the grouting liquid seepage distance and the like of the concrete test piece are tested, and recorded, and the test result is shown in Table 2.
TABLE 2 test results of the Properties of the concrete test pieces of example 1
Example 2: grouting material for waterproof of upstream surface of tunnel lining and grouting method thereof
The grouting material for waterproofing the upstream surface of the tunnel lining provided by the embodiment comprises a solution A and a solution B; wherein, the solution A comprises the following components in parts by weight: 100 parts of water, 40 parts of magnesium acrylate, 10 parts of N-N' -methylenebisacrylamide and 1 part of persulfate; the solution B comprises 100 parts of water, 40 parts of 2-hydroxyethyl methacrylate, 1 part of sodium sulfite and 5 parts of fluorescent tracer.
The material properties of the grouting material provided in this example are shown in table 3.
TABLE 3 Material Properties of the grouting Material of example 2
As shown in fig. 1, the grouting method of the grouting material provided in this embodiment is as follows:
step 1, preparing a concrete test piece, wherein one surface is used as a back surface, and the other surface is used as a water facing surface; 2 electrodes are pre-buried at the upstream surface and immersed for 1h to simulate the water-rich condition of the upstream surface; an electrode plate is arranged on the back surface, the electrode plate 1 is connected with the negative electrode of a direct current power supply to serve as a cathode, and an electrode 2 pre-buried at the position of the back surface is connected with the positive electrode of the power supply to serve as an anode;
Step 2, a direct current power supply is started to electrify the electrode plate 1 and the reserved electrode 2, water in the concrete is collected in a cathode area and is discharged from a back water surface crack;
Step 3, the positions of the cathodes and the anodes are changed at the moment, the electrode plate 1 is connected with the anode of a direct current power supply and is used as an anode, and the reserved electrode 2 is connected with the cathode of the power supply and is used as a cathode;
Step 4, cleaning water stains discharged from the surface of the concrete, drilling holes on the back surface of the concrete as grouting holes, setting the potential gradient to be 50V/m, setting the grouting pressure to be 0.05Mpa, and synchronously performing grouting and electroosmosis;
Step 5, firstly injecting part B solution, after 5s of interval, then injecting part A solution, after 5s of interval, then injecting part B solution, and circulating in such a way, and under the combined action of grouting pressure and electric field force, enabling each part A solution and each part B solution to sequentially permeate into micro-cracks and capillary channels of the concrete lining;
and 6, repeating the step 5, mixing the solution A and the solution B in the target area after the grouting is completed, carrying out free radical polymerization reaction under a redox initiation system with a half-life period of 120min, and finally forming a compact waterproof layer in the cathode area, which is close to the upstream surface of the concrete lining.
After the steps 1-6 are completed, the water seepage coefficient, the air seepage coefficient, the grouting liquid seepage distance and the like of the concrete test piece are tested, and recorded, and the test result is shown in Table 4.
TABLE 4 test results of the Properties of the concrete test pieces of example 2
Example 3: grouting material for waterproof of upstream surface of tunnel lining and grouting method thereof
The grouting material for waterproofing the upstream surface of the tunnel lining provided by the embodiment comprises a solution A and a solution B; wherein, the solution A comprises the following components in parts by weight: 80 parts of water, 40 parts of magnesium acrylate, 10 parts of N-N' -methylenebisacrylamide and 5 parts of persulfate; the solution B comprises: 80 parts of water, 40 parts of 2-hydroxyethyl methacrylate, 5 parts of sodium sulfite and 5 parts of fluorescent tracer.
The material properties of the grouting material provided in this example are shown in table 5.
TABLE 5 Material Properties of example 3 grouting materials
As shown in fig. 1, the grouting method of the grouting material provided in this embodiment is as follows:
Step 1, preparing a concrete test piece, wherein one surface is used as a back surface, and the other surface is used as a water facing surface; embedding an electrode 2 at the upstream surface and immersing for 1h to simulate the water-rich condition of the upstream surface; an electrode plate is arranged on the back surface, the electrode plate 1 is connected with the negative electrode of a direct current power supply to serve as a cathode, and an electrode 2 pre-buried at the position of the back surface is connected with the positive electrode of the power supply to serve as an anode;
Step 2, a direct current power supply is started to electrify the electrode plate 1 and the reserved electrode 2, water in the concrete is collected in a cathode area and is discharged from a back water surface crack;
Step 3, the position of the cathode and the anode is changed at the moment, the electrode plate 1 is connected with the anode of a direct current power supply and is used as an anode, and the reserved electrode 2 is connected with the cathode of the power supply and is used as a cathode;
Step 4, cleaning water stains discharged from the surface of the concrete, drilling holes on the back surface of the concrete as grouting holes, setting the potential gradient to be 50V/m, setting the grouting pressure to be 0.05Mpa, and synchronously performing grouting and electroosmosis;
Step 5, firstly injecting part A solution, after 5s of interval, then injecting part B solution, after 5s of interval, then injecting part A solution, and circulating in such a way, and under the combined action of grouting pressure and electric field force, enabling each part A solution and each part B solution to sequentially permeate into micro-cracks and capillary channels of the concrete lining;
and 6, repeating the step 5 until all grouting is completed, mixing the solution A and the solution B in a target area, carrying out free radical polymerization reaction under a redox initiation system with a half-life period of 70min, and finally forming a compact waterproof layer in a cathode area, which is close to the upstream surface of the concrete lining.
After the steps 1-6 are completed, the water seepage coefficient, the air seepage coefficient, the grouting liquid seepage distance and the like of the concrete test piece are tested, and recorded, and the test result is shown in Table 6.
TABLE 6 test results of the Properties of the concrete test pieces of example 3
Example 4: grouting material for waterproof of upstream surface of tunnel lining and grouting method thereof
The grouting material for waterproofing the upstream surface of the tunnel lining provided by the embodiment comprises a solution A and a solution B; wherein, the solution A comprises the following components in parts by weight: 100 parts of water, 40 parts of magnesium acrylate, 10 parts of N-N' -methylenebisacrylamide and 5 parts of persulfate; the solution B comprises: 100 parts of water, 30 parts of 2-hydroxyethyl methacrylate, 5 parts of sodium sulfite and 5 parts of fluorescent tracer.
The material properties of the grouting material provided in this example are shown in table 7.
TABLE 7 Material Properties of the grouting Material of EXAMPLE 4
As shown in fig. 1, the grouting method of the grouting material provided in this embodiment is as follows:
Step 1, preparing a concrete test piece, wherein one surface is used as a back surface, and the other surface is used as a water facing surface; embedding an electrode 2 at the upstream surface and immersing for 1h to simulate the water-rich condition of the upstream surface; an electrode plate 1 is arranged on the back surface, the electrode plate 1 is connected with the negative electrode of a direct current power supply to serve as a cathode, and an electrode 2 pre-buried at the position of the back surface is connected with the positive electrode of the power supply to serve as an anode;
Step 2, a direct current power supply is started to electrify the electrode plate 1 and the reserved electrode 2, water in the concrete is collected in a cathode area and is discharged from a back water surface crack;
Step 3, the position of the cathode and the anode is changed at the moment, the electrode plate 1 is connected with the anode of a direct current power supply and is used as an anode, and the reserved electrode 2 is connected with the cathode of the power supply and is used as a cathode;
Step 4, cleaning water stains discharged from the surface of the concrete, drilling holes on the back surface of the concrete as grouting holes, setting the potential gradient to be 50V/m, setting the grouting pressure to be 0.05Mpa, and synchronously performing grouting and electroosmosis;
Step 5, firstly injecting part A solution, after 5s of interval, then injecting part B solution, after 5s of interval, then injecting part A solution, and circulating in such a way, and under the combined action of grouting pressure and electric field force, enabling each part A solution and each part B solution to sequentially permeate into micro-cracks and capillary channels of the concrete lining;
And 6, repeating the step 5 until all grouting is completed, mixing the solution A and the solution B in a target area, carrying out free radical polymerization reaction under a redox initiation system with a half-life of 40min, and finally forming a compact waterproof layer in a cathode area, which is close to the upstream surface of the concrete lining.
After the steps 1-6 are completed, the water seepage coefficient, the air seepage coefficient, the grouting liquid seepage distance and the like of the concrete test piece are tested, and recorded, and the test result is shown in Table 8.
TABLE 8 test results of the Properties of the concrete test pieces of example 4
Example 5: grouting material for waterproof of upstream surface of tunnel lining and grouting method thereof
The grouting material for waterproofing the upstream surface of the tunnel lining provided by the embodiment comprises a solution A and a solution B; wherein, the solution A comprises the following components in parts by weight: 100 parts of water, 50 parts of magnesium acrylate, 10 parts of N-N' -methylenebisacrylamide and 5 parts of persulfate; the solution B comprises: 100 parts of water, 30 parts of 2-hydroxyethyl methacrylate, 5 parts of sodium sulfite and 5 parts of fluorescent tracer.
The material properties of the grouting material provided in this example are shown in table 9.
TABLE 9 Material Properties of example 5 grouting Material
As shown in fig. 1, the grouting method of the grouting material provided in this embodiment is as follows:
Step 1, preparing a concrete test piece, wherein one surface is used as a back surface, and the other surface is used as a water facing surface; embedding an electrode 2 at the upstream surface and immersing for 1h to simulate the water-rich condition of the upstream surface; an electrode plate 1 is arranged on the back surface, the electrode plate 1 is connected with the negative electrode of a direct current power supply to serve as a cathode, and an electrode 2 pre-buried at the position of the back surface is connected with the positive electrode of the power supply to serve as an anode;
Step 2, a direct current power supply is started to electrify the electrode plate 1 and the reserved electrode 2, water in the concrete is collected in a cathode area and is discharged from a back water surface crack;
Step 3, the position of the cathode and the anode is changed at the moment, the electrode plate 1 is connected with the anode of a direct current power supply and is used as an anode, and the reserved electrode 2 is connected with the cathode of the power supply and is used as a cathode;
Step 4, cleaning water stains discharged from the surface of the concrete, drilling holes on the back surface of the concrete as grouting holes, setting the potential gradient to be 50V/m, setting the grouting pressure to be 0.05Mpa, and synchronously performing grouting and electroosmosis;
Step 5, firstly injecting part A solution, after 5s of interval, then injecting part B solution, after 5s of interval, then injecting part A solution, and circulating in such a way, and under the combined action of grouting pressure and electric field force, enabling each part A solution and each part B solution to sequentially permeate into micro-cracks and capillary channels of the concrete lining;
And 6, repeating the step 5 until all grouting is completed, mixing the solution A and the solution B in a target area, carrying out free radical polymerization reaction under a redox initiation system with half-life of 90min, and finally forming a compact waterproof layer in a cathode area, which is close to the upstream surface of the concrete lining.
After the steps 1-6 are completed, the water seepage coefficient, the air seepage coefficient, the grouting liquid seepage distance and the like of the concrete test piece are tested, and recorded, and the test result is shown in a table 10.
TABLE 10 test results of the Properties of the concrete test pieces of example 5
Example 6: grouting material for waterproof of upstream surface of tunnel lining and grouting method thereof
The grouting material for waterproofing the upstream surface of the tunnel lining provided by the embodiment comprises a solution A and a solution B; wherein, the solution A comprises the following components in parts by weight: 100 parts of water, 50 parts of magnesium acrylate, 10 parts of N-N' -methylenebisacrylamide and 5 parts of persulfate; the solution B comprises: 100 parts of water, 40 parts of 2-hydroxyethyl methacrylate, 5 parts of sodium sulfite and 5 parts of fluorescent tracer.
The material properties of the grouting material provided in this example are shown in table 11.
TABLE 11 Material Properties of the grouting Material of EXAMPLE 6
As shown in fig. 1, the grouting method of the grouting material provided in this embodiment is as follows:
Step 1, preparing a concrete test piece, wherein one surface is used as a back surface, and the other surface is used as a water facing surface; embedding an electrode 2 at the upstream surface and immersing for 1h to simulate the water-rich condition of the upstream surface; an electrode plate 1 is arranged on the back surface, the electrode plate 1 is connected with the negative electrode of a direct current power supply to serve as a cathode, and an electrode 2 pre-buried at the position of the back surface is connected with the positive electrode of the power supply to serve as an anode;
Step 2, a direct current power supply is started to electrify the electrode plate 1 and the reserved electrode 2, water in the concrete is collected in a cathode area and is discharged from a back water surface crack;
Step 3, the position of the cathode and the anode is changed at the moment, the electrode plate 1 is connected with the anode of a direct current power supply and is used as an anode, and the reserved electrode 2 is connected with the cathode of the power supply and is used as a cathode;
Step 4, cleaning water stains discharged from the surface of the concrete, drilling holes on the back surface of the concrete as grouting holes, setting the potential gradient to be 50V/m, setting the grouting pressure to be 0.05Mpa, and synchronously performing grouting and electroosmosis;
Step 5, firstly injecting part A solution, after 5s of interval, then injecting part B solution, after 5s of interval, then injecting part A solution, and circulating in such a way, and under the combined action of grouting pressure and electric field force, enabling each part A solution and each part B solution to sequentially permeate into micro-cracks and capillary channels of the concrete lining;
And 6, repeating the step 5 until all grouting is completed, mixing the solution A and the solution B in a target area, carrying out free radical polymerization reaction under a redox initiation system with a half-life of 110min, and finally forming a compact waterproof layer in a cathode area, which is close to the upstream surface of the concrete lining.
After the steps 1-6 are completed, the water seepage coefficient, the air seepage coefficient, the grouting liquid seepage distance and the like of the concrete test piece are tested, and recorded, and the test result is shown in table 12.
TABLE 12 test results of the Properties of the concrete test pieces of example 6
Example 7: grouting material for waterproof of upstream surface of tunnel lining and grouting method thereof
The grouting material for waterproofing the upstream surface of the tunnel lining provided by the embodiment comprises a solution A and a solution B; wherein, the solution A comprises the following components in parts by weight: 100 parts of water, 40 parts of magnesium acrylate, 10 parts of N-N' -methylenebisacrylamide and 5 parts of persulfate; the solution B comprises: 100 parts of water, 40 parts of 2-hydroxyethyl methacrylate, 5 parts of sodium sulfite and 5 parts of fluorescent tracer.
The material properties of the grouting material provided in this example are shown in table 13.
TABLE 13 Material Properties of the grouting Material of EXAMPLE 7
As shown in fig. 1, the grouting method of the grouting material provided in this embodiment is as follows:
Step 1, preparing a concrete test piece, wherein one surface is used as a back surface, and the other surface is used as a water facing surface; embedding an electrode 2 at the upstream surface and immersing for 1h to simulate the water-rich condition of the upstream surface; an electrode plate 1 is arranged on the back surface, the electrode plate 1 is connected with the negative electrode of a direct current power supply to serve as a cathode, and an electrode 2 pre-buried at the position of the back surface is connected with the positive electrode of the power supply to serve as an anode;
Step 2, a direct current power supply is started to electrify the electrode plate 1 and the reserved electrode 2, water in the concrete is collected in a cathode area and is discharged from a back water surface crack;
Step 3, the position of the cathode and the anode is changed at the moment, the electrode plate 1 is connected with the anode of a direct current power supply and is used as an anode, and the reserved electrode 2 is connected with the cathode of the power supply and is used as a cathode;
Step 4, cleaning water stains discharged from the surface of the concrete, drilling holes on the back surface of the concrete as grouting holes, setting the potential gradient to be 50V/m, setting the grouting pressure to be 0.1Mpa, and synchronously performing grouting and electroosmosis;
Step 5, firstly injecting part A solution, after 5s of interval, then injecting part B solution, after 5s of interval, then injecting part A solution, and circulating in such a way, and under the combined action of grouting pressure and electric field force, enabling each part A solution and each part B solution to sequentially permeate into micro-cracks and capillary channels of the concrete lining;
and 6, repeating the step 5 until all grouting is completed, mixing the solution A and the solution B in a target area, carrying out free radical polymerization reaction under a redox initiation system with a half-life period of 70min, and finally forming a compact waterproof layer in a cathode area, which is close to the upstream surface of the concrete lining.
After the steps 1-6 are completed, the water seepage coefficient, the air seepage coefficient, the grouting liquid seepage distance and the like of the concrete test piece are tested, and recorded, and the test result is shown in a table 14.
TABLE 14 test results of the Properties of the concrete test pieces of example 7
Example 8: grouting material for waterproof of upstream surface of tunnel lining and grouting method thereof
The grouting material for waterproofing the upstream surface of the tunnel lining provided by the embodiment comprises a solution A and a solution B; wherein, the solution A comprises the following components in parts by weight: 100 parts of water, 40 parts of magnesium acrylate, 10 parts of N-N' -methylenebisacrylamide and 5 parts of persulfate; the solution B comprises: 100 parts of water, 40 parts of 2-hydroxyethyl methacrylate, 5 parts of sodium sulfite and 5 parts of fluorescent tracer.
The material properties of the grouting material provided in this example are shown in table 15.
TABLE 15 Material Properties of example 8 grouting Material
As shown in fig. 1, the grouting method of the grouting material provided in this embodiment is as follows:
Step 1, preparing a concrete test piece, wherein one surface is used as a back surface, and the other surface is used as a water facing surface; embedding an electrode 2 at the upstream surface and immersing for 1h to simulate the water-rich condition of the upstream surface; an electrode plate 1 is arranged on the back surface, the electrode plate 1 is connected with the negative electrode of a direct current power supply to serve as a cathode, and an electrode 2 pre-buried at the position of the back surface is connected with the positive electrode of the power supply to serve as an anode;
Step 2, a direct current power supply is started to electrify the electrode plate 1 and the reserved electrode 2, water in the concrete is collected in a cathode area and is discharged from a back water surface crack;
Step 3, the position of the cathode and the anode is changed at the moment, the electrode plate 1 is connected with the anode of a direct current power supply and is used as an anode, and the reserved electrode 2 is connected with the cathode of the power supply and is used as a cathode;
step 4, cleaning water stains discharged from the surface of the concrete, drilling holes on the back surface of the concrete as grouting holes, setting the potential gradient to 330V/m, setting the grouting pressure to 0.05Mpa, and synchronously performing grouting and electroosmosis;
Step 5, firstly injecting part A solution, after 5s of interval, then injecting part B solution, after 5s of interval, then injecting part A solution, and circulating in such a way, and under the combined action of grouting pressure and electric field force, enabling each part A solution and each part B solution to sequentially permeate into micro-cracks and capillary channels of the concrete lining;
and 6, repeating the step 5 until all grouting is completed, mixing the solution A and the solution B in a target area, carrying out free radical polymerization reaction under a redox initiation system with a half-life period of 70min, and finally forming a compact waterproof layer in a cathode area, which is close to the upstream surface of the concrete lining.
After the steps 1-6 are completed, the water seepage coefficient, the air seepage coefficient, the grouting liquid seepage distance and the like of the concrete test piece are tested, and recorded, and the test result is shown in a table 16.
TABLE 16 test results of the Properties of the concrete test pieces of example 8
Comparative example 1
The charged grouting material provided in the comparative example consists of a solution A and a solution B, wherein the solution A comprises 100 parts of water, 40 parts of magnesium acrylate, 10 parts of N-N' -methylenebisacrylamide and 5 parts of persulfate according to parts by weight; the solution B comprises 100 parts of water, 40 parts of 2-hydroxyethyl methacrylate, 5 parts of sodium sulfite and 5 parts of fluorescent tracer.
Material properties:
TABLE 17 characteristics of the charged grouting material of comparative example 1
As shown in fig. 2, the single mechanical pressure grouting method is as follows:
Step 1, preparing a concrete test piece;
Step 2, drilling holes on the surface of the concrete to serve as grouting holes, wherein grouting pressure is set to be 0.05Mpa, and grouting is carried out;
Step 3, firstly injecting part of solution A, after 5 seconds of interval, then injecting part of solution B, after 5 seconds of interval, then injecting part of solution A, and circulating in this way;
step 4, repeating the step 3, mixing the solution A and the solution B in the target area after the whole grouting is completed, and carrying out free radical polymerization under a redox initiation system with a half-life of 70 min;
And 5, after the steps 1-4 are completed, testing the water seepage coefficient, the gas seepage coefficient and the grouting liquid seepage distance of the concrete test piece, and recording the water seepage coefficient, the gas seepage coefficient and the grouting liquid seepage distance, wherein the record is shown in a table 18.
TABLE 18 detection results of concrete Performance after the electric field force-mechanical pressure grouting method in comparative example 1
Compared with the example 1, the comparative example 1 is grouting under a smaller single mechanical grouting pressure, the permeation speed of the slurry in the pore canal is slow under the synergistic effect of no electric field force, the pore canal is blocked, the pore canal cannot be filled with the slurry, the water permeability coefficient and the gas permeability coefficient of the concrete are as high as 40.0X10 -10cm/s and 88.4X10 -11cm/s, and the permeation distance is only 5.1cm, so that the grouting effect is poor.
Comparative example 2
The charged grouting material provided in the comparative example consists of a solution A and a solution B, wherein the solution A comprises 100 parts of water, 40 parts of magnesium acrylate, 10 parts of N-N' -methylenebisacrylamide and 5 parts of persulfate according to parts by weight; the solution B comprises 100 parts of water, 40 parts of 2-hydroxyethyl methacrylate, 5 parts of sodium sulfite and 5 parts of fluorescent tracer.
Material properties:
TABLE 19 characteristics of the charged grouting material of comparative example 2
As shown in fig. 2, the single mechanical pressure grouting method is as follows:
Step 1, preparing a concrete test piece;
step 2, drilling holes on the surface of the concrete to serve as grouting holes, wherein grouting pressure is set to be 0.7Mpa, and grouting is carried out;
step 3, under the action of grouting pressure, the solution A firstly permeates into micro-gaps and capillary channels of the concrete lining, and after grouting for 5 seconds, the solution B permeates;
step 4, repeating the step 3, mixing the solution A and the solution B in the target area after the whole grouting is completed, and carrying out free radical polymerization under a redox initiation system with a half-life of 70 min;
and 5, after the steps 1-4 are completed, testing the water seepage coefficient, the gas seepage coefficient and the grouting liquid seepage distance of the concrete test piece, and recording the water seepage coefficient, the gas seepage coefficient and the grouting liquid seepage distance, wherein the record is shown in a table 20.
TABLE 20 test results of the properties of concrete test pieces of comparative example 2
In comparison with example 1 and comparative example 1, comparative example 2 was grouting at a larger single mechanical grouting pressure, and under the synergistic effect of no electric field force, the grouting pressure was too large to cause reverse grouting, and the grouting liquid could not penetrate into micro-cracks and capillary channels of the concrete, and the water permeability coefficient and the air permeability coefficient of the concrete were as high as 37.9X10 -10cm/s and 90.7X10 -11cm/s, and the penetration distance was only 7.4cm, resulting in poor grouting effect.
The experimental result shows that under the synergistic effect of small mechanical grouting pressure and electric field force, good controllable grouting waterproof effect can be obtained when adverse conditions of water enrichment on the upstream surface of concrete are met. Under the same condition, when the grouting pressure is increased from 0.05Mpa to 0.7Mpa, the water seepage coefficient, the gas seepage coefficient and the permeation distance of the concrete test piece are not changed greatly, and therefore, the grouting effect is not changed by single grouting pressure increase.
Meanwhile, compared with single mechanical grouting pressure, under the synergistic effect of the mechanical grouting pressure and the electric field force, the grouting device has the advantages that the effective grouting range is wider, the slurry distribution is more uniform, the grouting effect is more, a compact waterproof layer can be formed in the embedded electrode area of the outermost layer of the upstream surface, and the waterproof problem of the tunnel concrete lining under the adverse condition of water enrichment of the upstream surface can be effectively solved.
The present invention is not limited to the above-mentioned embodiments, but is not limited to the above-mentioned embodiments, and any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical matters of the present invention can be made by those skilled in the art without departing from the scope of the present invention.
Claims (4)
1. The grouting method of the grouting material for waterproof of the upstream surface of the tunnel lining is characterized in that the grouting material consists of a solution A and a solution B; the grouting material also comprises a redox initiation system, wherein the redox initiation system consists of an oxidant in the solution A and a reducing agent in the solution B, and the half life period of the redox initiation system is longer than the grouting time of the grouting material;
The solution A and the solution B are also charged, so that the solution A and the solution B generate directional movement when being subjected to electric field force;
The solution A comprises the following components in parts by weight: 40-50 parts of monomer a, 10-15 parts of cross-linking agent and 1-5 parts of oxidant;
The solution B comprises the following components in parts by weight: 80-100 parts of water, 30-40 parts of monomer b, 5 parts of fluorescent tracer and 1-5 parts of reducer;
the monomer a is any one of sodium acrylate, calcium acrylate or magnesium acrylate;
the monomer b is 2-hydroxyethyl acrylate or 2-hydroxyethyl methacrylate;
The grouting method of the grouting material comprises the following operation steps:
step 1, arranging an electrode plate 1 on the back surface of a tunnel concrete lining, wherein the electrode plate is connected with a negative electrode of a direct current power supply as a cathode, and an embedded electrode 2 at the position of the back surface is connected with a positive electrode of the power supply as an anode;
step 2, a direct current power supply is started to electrify the electrode plate and the reserved electrode, water in the concrete lining is collected in a cathode area and then discharged through cracks on the back surface of the lining;
Step 3, the positions of the cathodes and the anodes are changed at the moment, the electrode plate 1 is connected with the anode of a direct current power supply and the pre-buried electrode 2 is connected with the cathode of the power supply and serves as the cathode;
Step 4, cleaning water stains discharged from the surface of the concrete lining, and drilling holes which are used as grouting holes and are avoided from the electrode 2 on the back surface of the concrete lining, wherein grouting and electroosmosis are synchronously performed after the setting is completed;
Step 5, dividing the solution A and the solution B into a plurality of parts, alternately injecting the solution A and the solution B under the combined action of grouting pressure and electric field force to enable the solution A and the solution B to respectively reach cracks in a concrete lining in sequence, and after grouting the solution A or the solution B for 5-10 seconds, allowing the other solution to permeate;
Step 6, after the whole grouting is completed, mixing the solution A and the solution B in a target area, and carrying out free radical polymerization reaction under a redox initiation system with half-life of 40-120 min to form gel, and uniformly filling micro-gaps and capillary channels in a concrete lining structure to form preliminary grouting water resistance;
and 7, when the preliminary grouting waterproof is formed, the solution A and the solution B are mixed and reacted in the embedded electrode area of the outermost layer of the upstream surface under the action of electric field force, and a compact waterproof layer is formed in the area.
2. The grouting method for grouting material for water proofing of a tunnel lining upstream face according to claim 1, wherein the cross-linking agent is one or a mixture of more of N-N' methylenebisacrylamide, vinyltrimethoxysilane, N-methylolacrylamide, 2-hydroxyethyl acrylate or ethylene glycol acrylate.
3. The grouting method of grouting material for waterproofing a water upstream surface of tunnel lining according to claim 1, wherein the oxidizing agent is any one of persulfate, hydrogen peroxide or cumene hydroperoxide; the reducing agent is any one of sodium sulfite and ferrous salt.
4. The grouting method of grouting material for waterproofing a water facing surface of tunnel lining according to claim 1, wherein the electric field force is formed by an electric potential gradient applied between an electrode plate on a concrete surface and an embedded electrode in the tunnel concrete lining, the electric potential gradient being 50V/m to 333V/m.
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| CN113788665A (en) * | 2021-11-10 | 2021-12-14 | 北京城建集团有限责任公司 | Method for configuring low-shear-strength grouting material for shield excavation gap |
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