CN108716405B - Constructing tunnel dual slurry grouting construction method - Google Patents

Constructing tunnel dual slurry grouting construction method Download PDF

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Publication number
CN108716405B
CN108716405B CN201810496924.3A CN201810496924A CN108716405B CN 108716405 B CN108716405 B CN 108716405B CN 201810496924 A CN201810496924 A CN 201810496924A CN 108716405 B CN108716405 B CN 108716405B
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grouting
slurries
slip casting
dual slurry
water
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CN108716405A (en
Inventor
张丛
唐孝中
郭建
李信龙
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Qingdao Engineering Co Ltd of China Railway No 10 Engineering Group Co Ltd
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Qingdao Engineering Co Ltd of China Railway No 10 Engineering Group Co Ltd
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/001Improving soil or rock, e.g. by freezing; Injections
    • E21D9/002Injection methods characterised by the chemical composition used
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/24Compositions 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 alkyl, ammonium or metal silicates; containing silica sols
    • C04B28/26Silicates of the alkali metals
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04Lining with building materials
    • E21D11/10Lining 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
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00724Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/70Grouts, e.g. injection mixtures for cables for prestressed concrete

Abstract

The invention discloses a kind of constructing tunnel dual slurry grouting construction methods, are related to technical field of tunnel construction, its key points of the technical solution are that the following steps are included: (1) prepares and checks equipment;(2) surface drilling;(3) slurries: the first slurries are prepared: being uniformly mixed and is made by mixed liquor, cement and the first additive that mass ratio is 1:1:0.15;Second slurries: it is uniformly mixed and is made by water glass solution, prodan and the second additive that mass ratio is 1:1:0.16;(4) slip casting: when the first slurries of injection, control grouting pressure is 0.5~1.5Mpa, and flow rate of grouting is 14~15L/min;The first Grouting Pipe 1.5m is retreated, continues to inject the second slurries, control grouting pressure is 0.5~1.5Mpa, and flow rate of grouting is 13~15L/min.The present invention solves dual slurry and is easy to be lost in the problems in soil layer during completely decomposed quartzite plenty water weak surrounding rock constructing tunnel, and having reached makes dual slurry rapid condensation, reduces the effect of dual slurry waste.

Description

Constructing tunnel dual slurry grouting construction method
Technical field
The present invention relates to technical field of tunnel construction, more specifically, it is related to a kind of constructing tunnel dual slurry slip casting Construction method.
Background technique
Two fluid grouting is replaced waterglass with calcium chloride solution in injection soil, and two kinds of solution, which react rapidly, generates silicon Glue and gel of calcium silicate play the role of cementing and filling pore, improve the intensity of soil and bearing capacity.
In the prior art, it can refer to the Chinese invention patent file that Authorization Notice No. is CN105155541B, it discloses A kind of dual slurry closure construction method of catch pit, comprising the following steps: (1) be laid with drilling machine platform around slip casting position;(2) The preparation of slurries: the first slurries: mass ratio is A liquid, B liquid and the first additive of 1:1:0.13;Second slurries: mass ratio 1: A ' liquid, C liquid and the second additive of 1:0.17;(3) injected hole is laid;(4) rotary drilling-head penetrates stratum extremely design hole depth 4.5m, Then start retrusive and inject the first slurries, grouting pressure control retreats drilling rod 1m, continue injection second in 0.5~1.0Mpa Slurries, grouting pressure control 1.1~1.4Mpa, continue to retreat drilling rod, circuit sequentially;When drilling rod retreats to 1m, the first slurries are injected, It can be moved to down after the completion with hole location;(5) after excavating catch pit on the ground of slip casting, waterproof is smeared in catch pit wall surface and is applied Material.
When constructing in completely decomposed quartzite plenty water weak surrounding rock tunnel geology, soil layer contains water saturation, seeps water wide, in soft Modeling-stream moulds shape, and gap is more, and dual slurry consolidation time is long, and pressure increases, and slurries can flow away with gap, causes the wave of dual slurry Take and is unable to reach expected effects;Therefore it needs to design a kind of dual slurry setting time faster constructing tunnel to be infused with dual slurry The construction method of slurry.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of constructing tunnel dual slurry slip casting Construction method can make dual slurry rapid condensation, reduce the waste of dual slurry.
To achieve the above object, the present invention provides the following technical scheme that a kind of constructing tunnel dual slurry mortar depositing construction Method, comprising the following steps: (1) prepare and check equipment: according to surface state to be onstructed, haulage equipment, and checking that equipment is It is no to work well;(2) surface drilling: being drilled using water drilling puncher and arranges that injected hole in blossom type, is being drilled through most When the injected hole in outside, the outer limb of dilling angle is 9~11 °, and digs gutter;The aperture of injected hole is 0.42m, adjacent The distance of two injected holes is 0.35m, and hole location maximum deviation should be 0.05m;Drilling depth should reach design grouting reinforcement depth, Borehole perpendicularity error is less than 0.45% simultaneously;When reaching predetermined depth, injected hole is rinsed with maximum pressure and by Grouting Pipe Nozzle is sealed;(3) slurries: the first slurries are prepared: being mixed by mixed liquor, cement and the first additive that mass ratio is 1:1:0.15 Uniformly it is made;Mixed liquor is that the water that mass ratio is 1:0.1 and retarder are uniformly mixed and are made;First additive is by quality Than being mixed for the polyacrylic acid, polymethylacrylic acid and ortho-aminophenol of 1:1:1;Second slurries: being 1:1 by mass ratio: 0.16 water glass solution, prodan and the second additive, which is uniformly mixed, to be made;The water glass solution is 43 waves by concentration U.S. degree is diluted with water to 35 Baume degrees, modulus 2.9-3.1;Second additive be by mass ratio be 1:2:2 calcium sulfate, Aluminium powder and sodium metaaluminate are mixed;(4) slip casting: when the first slurries of injection, control grouting pressure is 0.5~1.5Mpa, slip casting Flow is 14~15L/min;The first Grouting Pipe 1.5m is retreated, the second slurries are injected, control grouting pressure is 0.5~1.5Mpa, Flow rate of grouting is 13~15L/min;Continue to retreat the second Grouting Pipe, circuit sequentially;When Grouting Pipe retreats to 1.5m, the first slurry of injection Liquid;Next injected hole is moved to using every hole injection mode after the completion.
By using above-mentioned technical proposal, first according to construction ground the case where, whether detection device works well, on ground On drilled and be rinsed with water drilling puncher, can fill the water in drilling into injected hole, the water energy in injected hole So that injected hole is kept wet, in slip casting, the moisture in the soil absorption slurries in injected hole can be prevented, cause slurries fast Rapid hardening knot, and condensation effect is poor;It is mixed using retarder and the mixed mixed liquor of water with cement 1:1, so the ratio of mud is 1:1;Retarder is added in cement can extend the hydration and hardening time of cement, and cement is made to keep plasticity in a long time, Prevent the cement setting before for slip casting;Polyacrylic acid, polymethylacrylic acid and ortho-aminophenol are added in the first slurries, by gathering The organic accelerator of low bases that acrylic acid, polymethylacrylic acid and ortho-aminophenol are mixed can make the water in the first slurries Mud rear rapid condensation in injection injected hole, and can be improved the intensity of cement;Calcium sulfate, aluminium powder are added in the second slurries And sodium metaaluminate, because cement and waterglass can react, reaction equation is as follows: Na2O·nSiO2+Ca(OH)2→(n- 1)SiO2+CaSiO3+2NaOH;Calcium sulfate can react with sodium hydroxide, and reaction equation is as follows: CaSO4+2NaOH→Ca (OH)2↓+2NaSO4;Aluminium powder can also react with sodium hydroxide, and reaction equation is as follows: 2Al+2NaOH+2H2O= 2NaAlO2+3H2↑;The sodium metaaluminate in sodium metaaluminate and the second outer machine agent that aluminium powder and sodium hydroxide generate also can and hydroxide Sodium reacts, and reaction equation is as follows: 2NaAlO2+3CaO+7H2O→3CaO·Al2O3·6H2O+2NaOH;Calcium sulfate, aluminium Powder can react the sodium hydroxide reaction generated with waterglass and cement, promote the hydration reaction of tricalcium aluminate (C3A), the heat of hydration Generation promote reaction process and intensity development, react generation sodium sulphate have promote hydration, keep chloric acid tricalcium fast Fast aquation accelerates condensation cure in entringite, shortens the setting time of dual slurry;The slip casting pressure of two Grouting Pipes when slip casting Power and flow rate of grouting are roughly the same, so slurries ratio is 1:1, adjacent slurries can be made to be mutually twisted using blossom type slip casting, made Adjacent slurries mixing is more uniform.
The present invention is further arranged to: further including glass-cermic powder, alum and thinner, waterglass, casting in second slurries Mountain flour, alum and thinner mass ratio are 1:0.2:0.5:0.8.
By using above-mentioned technical proposal, glass-cermic powder can be in the resistance to acid and alkali for increasing waterglass;Alum can increase water The waterproofness of glass;Thinner can reduce the viscosity of waterglass.
The present invention is further arranged to: the thinner includes one of potassium bichromate, sodium nitrite and triethanolamine Or it is several.
By using above-mentioned technical proposal, modulus of water glass is bigger, and silica content is more, and waterglass viscosity increases, institute To need to reduce the viscosity of waterglass using potassium bichromate or sodium nitrite, triethanolamine.
The present invention is further arranged to: the retarder refers to sodium tripolyphosphate.
By using above-mentioned technical proposal, sodium tripolyphosphate is commonly used for water retention agent, can reduce cement or parget water Change speed and the heat of hydration, extend setting time, prevents the setting time of cement very fast, cause the condensation effect of cement bad.
The present invention is further arranged to: the first slurries are needed to pour into and be deposited in stock tank after the completion of preparation in the step (3) Filtering.
By using above-mentioned technical proposal, cement forms cement after mixing with mixed liquor to deposit stock tank for cement slurry Middle placement filtering, can be such that particle thicker in cement slurry removes, prevent the presence of the cement slurry in slip casting from blocking up compared with coarse granule Fill in Grouting Pipe.
The present invention is further arranged to: opening the water discharging valve near Grouting Pipe in slip casting in the step (4).
By using above-mentioned technical proposal, when slip casting, slurries enter injected hole from the top of injected hole, and slurries can be to note Water in slurry hole is squeezed, and opening water discharging valve can be convenient for the water in discharge injected hole.
The present invention is further arranged to: the Grouting Pipe that step (4) slip casting is completed need to be rinsed with clear-water high-pressure.
By using above-mentioned technical proposal, rinsing Grouting Pipe using clear-water high-pressure and can be avoided on slip casting inside pipe wall has residual Slurries solidified in slip casting inside pipe wall, after remaining slurries are rinsed well, can be avoided next slip casting hand and remain and solidify Slurries block Grouting Pipe.
The present invention is further arranged to: being respectively mounted valve and meter in two Grouting Pipes in the step (4).
By using above-mentioned technical proposal, it is respectively mounted valve and meter in two Grouting Pipes, is gated by regulating valve Flow processed makes flow reach the slurries ratio of required dual slurry.
The present invention is further arranged to: Grouting Pipe moves on to before next injected hole starts slip casting in the step (4), core Look into the slip casting time of adjacent two Grouting Pipes.
By using above-mentioned technical proposal, the slip casting time of two Grouting Pipes is verified, it can be convenient for two Grouting Pipes of control The slip casting time and flow, and then control dual slurry slurries ratio.
In conclusion the present invention has the advantages that compared with the prior art
(1) present invention adds the second additive, energy by adding the first additive in the first slurries in the second slurries Enough make the first slurries and the second slurries in mixing, rapid condensation shortens setting time, reduces the waste of dual slurry;
(2) present invention can increase the acidproof of waterglass by adding glass-cermic powder, alum and thinner in the second slurries Alkalinity and waterproofness, and can reduce the viscosity of waterglass, it is uniformly mixed waterglass with cement slurry;
(3) the first slurries of the invention by that will prepare completion, which are placed on to deposit in stock tank, filters, and can remove thicker Grain prevents cement grout from blocking Grouting Pipe.
Specific embodiment
A kind of embodiment 1: constructing tunnel dual slurry grouting construction method, comprising the following steps:
(1) prepare and check equipment: according to surface state to be onstructed, haulage equipment, and checking whether equipment works well;
(2) surface drilling: being drilled using water drilling puncher and arranges that injected hole in blossom type, is drilling through outermost Injected hole when, the outer limb of dilling angle is 9~11 °, and digs gutter;The aperture of injected hole be 0.42m, adjacent two The distance of injected hole is 0.35m, and hole location maximum deviation should be 0.05m;Drilling depth should reach design grouting reinforcement depth, simultaneously Borehole perpendicularity error is less than 0.45%;When reaching predetermined depth, injected hole is rinsed with maximum pressure and by the nozzle of Grouting Pipe It seals;It is drilled using water drilling puncher, injected hole inner wall can be made to be soaked in water, can prevented in slip casting, soil is inhaled The moisture in slurries is received, and leads to slurries rapid condensation;
(3) slurries: the first slurries are prepared: being mixed by mixed liquor, cement and the first additive that mass ratio is 1:1:0.15 Uniformly it is made;Mixed liquor is that the water that mass ratio is 1:0.1 and sodium tripolyphosphate are uniformly mixed and are made;First additive is by quality Than being mixed for the polyacrylic acid, polymethylacrylic acid and ortho-aminophenol of 1:1:1;First slurries are placed on and are deposited in stock tank Filtering, can filter out particle thicker in cement slurry, prevent from blocking Grouting Pipe when slip casting;
Second slurries: it is uniformly mixed by water glass solution, prodan and the second additive that mass ratio is 1:1:0.16 It is made;Water glass solution is that 43 Baume degrees are diluted with water to 35 Baume degrees, modulus 2.9-3.1 by concentration;Second additive is It is mixed by calcium sulfate, aluminium powder and sodium metaaluminate that mass ratio is 1:2:2;Further include in second slurries glass-cermic powder, alum and Thinner, waterglass, glass-cermic powder, alum and thinner mass ratio are 1:0.2:0.5:0.8;Thinner refers to potassium bichromate;
(4) slip casting: the water discharging valve near Grouting Pipe is opened, can be in slip casting, will be in injected hole using slurries Water squeezes out;Valve and meter are installed in two Grouting Pipes, it can be convenient for the slurries ratio of control dual slurry;Inject the first slurries When, control grouting pressure is 0.5~1.5Mpa, and flow rate of grouting is 14~15L/min;The first Grouting Pipe 1.5m is retreated, continues to infuse Enter the second slurries, control grouting pressure is 0.5~1.5Mpa, and flow rate of grouting is 13~15L/min;Continue to retreat the second slip casting Pipe, circuits sequentially;When Grouting Pipe retreats to 1.5m, the first slurries are injected;Next slip casting is moved to using every hole injection mode after the completion Hole is moved to before next injected hole starts slip casting, the slip casting time of two Grouting Pipes need to be checked, convenient for controlling the slurry of dual slurry Liquor ratio;Grouting Pipe is rinsed with clear-water high-pressure after the completion of slip casting, can prevent remaining slurries from consolidating in slip casting inside pipe wall, Grouting Pipe is blocked in next slip casting.
A kind of comparative example 1: constructing tunnel dual slurry grouting construction method, comprising the following steps:
(1) prepare and check equipment: according to surface state to be onstructed, haulage equipment, and checking whether equipment works well;
(2) surface drilling: being drilled using water drilling puncher and arranges that injected hole in blossom type, is drilling through outermost Injected hole when, the outer limb of dilling angle is 9~11 °, and digs gutter;The aperture of injected hole be 0.42m, adjacent two The distance of injected hole is 0.35m, and hole location maximum deviation should be 0.05m;Drilling depth should reach design grouting reinforcement depth, simultaneously Borehole perpendicularity error is less than 0.45%;When reaching predetermined depth, injected hole is rinsed with maximum pressure and by the nozzle of Grouting Pipe It seals;It is drilled using water drilling puncher, injected hole inner wall can be made to be soaked in water, can prevented in slip casting, soil is inhaled The moisture in slurries is received, and leads to slurries rapid condensation;
(3) slurries: the first slurries are prepared: being uniformly made of mixed liquor and cement mixing that mass ratio is 1:1;Mixed liquor is The water and sodium tripolyphosphate that mass ratio is 1:0.1, which are uniformly mixed, to be made;First slurries are placed on to deposit in stock tank and are filtered, it being capable of mistake Particle thicker in cement slurry is filtered, prevents from blocking Grouting Pipe when slip casting;
Second slurries: it is uniformly mixed by water glass solution, prodan and the second additive that mass ratio is 1:1:0.16 It is made;Water glass solution is that 43 Baume degrees are diluted with water to 35 Baume degrees, modulus 2.9-3.1 by concentration;Second additive is It is mixed by calcium sulfate, aluminium powder and sodium metaaluminate that mass ratio is 1:2:2;Further include in second slurries glass-cermic powder, alum and Thinner, waterglass, glass-cermic powder, alum and thinner mass ratio are 1:0.2:0.5:0.8;Thinner refers to potassium bichromate;
(4) slip casting: the water discharging valve near Grouting Pipe is opened, can be in slip casting, will be in injected hole using slurries Water squeezes out;Valve and meter are installed in two Grouting Pipes, it can be convenient for the slurries ratio of control dual slurry;Inject the first slurries When, control grouting pressure is 0.5~1.5Mpa, and flow rate of grouting is 14~15L/min;The first Grouting Pipe 1.5m is retreated, continues to infuse Enter the second slurries, control grouting pressure is 0.5~1.5Mpa, and flow rate of grouting is 13~15L/min;Continue to retreat the second slip casting Pipe, circuits sequentially;When Grouting Pipe retreats to 1.5m, the first slurries are injected;Next slip casting is moved to using every hole injection mode after the completion Hole is moved to before next injected hole starts slip casting, the slip casting time of two Grouting Pipes need to be checked, convenient for controlling the slurry of dual slurry Liquor ratio;Grouting Pipe is rinsed with clear-water high-pressure after the completion of slip casting, can prevent remaining slurries from consolidating in slip casting inside pipe wall, Grouting Pipe is blocked in next slip casting.
A kind of comparative example 2: constructing tunnel dual slurry grouting construction method, comprising the following steps:
(1) prepare and check equipment: according to surface state to be onstructed, haulage equipment, and checking whether equipment works well;
(2) surface drilling: being drilled using water drilling puncher and arranges that injected hole in blossom type, is drilling through outermost Injected hole when, the outer limb of dilling angle is 9~11 °, and digs gutter;The aperture of injected hole be 0.42m, adjacent two The distance of injected hole is 0.35m, and hole location maximum deviation should be 0.05m;Drilling depth should reach design grouting reinforcement depth, simultaneously Borehole perpendicularity error is less than 0.45%;When reaching predetermined depth, injected hole is rinsed with maximum pressure and by the nozzle of Grouting Pipe It seals;It is drilled using water drilling puncher, injected hole inner wall can be made to be soaked in water, can prevented in slip casting, soil is inhaled The moisture in slurries is received, and leads to slurries rapid condensation;
(3) slurries: the first slurries are prepared: being mixed by mixed liquor, cement and the first additive that mass ratio is 1:1:0.15 Uniformly it is made;Mixed liquor is that the water that mass ratio is 1:0.1 and sodium tripolyphosphate are uniformly mixed and are made;First additive is by quality Than being mixed for the polyacrylic acid, polymethylacrylic acid and ortho-aminophenol of 1:1:1;First slurries are placed on and are deposited in stock tank Filtering, can filter out particle thicker in cement slurry, prevent from blocking Grouting Pipe when slip casting;
Second slurries: it is uniformly mixed and is made by water glass solution and prodan that mass ratio is 1:1;Water glass solution by Concentration is that 43 Baume degrees are diluted with water to 35 Baume degrees, modulus 2.9-3.1;Further include in second slurries glass-cermic powder, alum and Thinner, waterglass, glass-cermic powder, alum and thinner mass ratio are 1:0.2:0.5:0.8;Thinner refers to potassium bichromate;
(4) slip casting: the water discharging valve near Grouting Pipe is opened, can be in slip casting, will be in injected hole using slurries Water squeezes out;Valve and meter are installed in two Grouting Pipes, it can be convenient for the slurries ratio of control dual slurry;Inject the first slurries When, control grouting pressure is 0.5~1.5Mpa, and flow rate of grouting is 14~15L/min;The first Grouting Pipe 1.5m is retreated, continues to infuse Enter the second slurries, control grouting pressure is 0.5~1.5Mpa, and flow rate of grouting is 13~15L/min;Continue to retreat the second slip casting Pipe, circuits sequentially;When Grouting Pipe retreats to 1.5m, the first slurries are injected;Next slip casting is moved to using every hole injection mode after the completion Hole is moved to before next injected hole starts slip casting, the slip casting time of two Grouting Pipes need to be checked, convenient for controlling the slurry of dual slurry Liquor ratio;Grouting Pipe is rinsed with clear-water high-pressure after the completion of slip casting, can prevent remaining slurries from consolidating in slip casting inside pipe wall, Grouting Pipe is blocked in next slip casting.
A kind of comparative example 3: constructing tunnel dual slurry grouting construction method, comprising the following steps:
(1) prepare and check equipment: according to surface state to be onstructed, haulage equipment, and checking whether equipment works well;
(2) surface drilling: being drilled using water drilling puncher and arranges that injected hole in blossom type, is drilling through outermost Injected hole when, the outer limb of dilling angle is 9~11 °, and digs gutter;The aperture of injected hole be 0.42m, adjacent two The distance of injected hole is 0.35m, and hole location maximum deviation should be 0.05m;Drilling depth should reach design grouting reinforcement depth, simultaneously Borehole perpendicularity error is less than 0.45%;When reaching predetermined depth, injected hole is rinsed with maximum pressure and by the nozzle of Grouting Pipe It seals;It is drilled using water drilling puncher, injected hole inner wall can be made to be soaked in water, can prevented in slip casting, soil is inhaled The moisture in slurries is received, and leads to slurries rapid condensation;
(3) slurries: the first slurries are prepared: being uniformly made of mixed liquor and cement mixing that mass ratio is 1:1:0.15;It is mixed Conjunction liquid is that the water that mass ratio is 1:0.1 and sodium tripolyphosphate are uniformly mixed and are made;First slurries are placed on to deposit in stock tank and are filtered, Particle thicker in cement slurry can be filtered out, prevents from blocking Grouting Pipe when slip casting;
Second slurries: it is uniformly mixed and is made by water glass solution and prodan that mass ratio is 1:1;Water glass solution by Concentration is that 43 Baume degrees are diluted with water to 35 Baume degrees, modulus 2.9-3.1;Further include in second slurries glass-cermic powder, alum and Thinner, waterglass, glass-cermic powder, alum and thinner mass ratio are 1:0.2:0.5:0.8;Thinner refers to potassium bichromate;
(4) slip casting: the water discharging valve near Grouting Pipe is opened, can be in slip casting, will be in injected hole using slurries Water squeezes out;Valve and meter are installed in two Grouting Pipes, it can be convenient for the slurries ratio of control dual slurry;Inject the first slurries When, control grouting pressure is 0.5~1.5Mpa, and flow rate of grouting is 14~15L/min;The first Grouting Pipe 1.5m is retreated, continues to infuse Enter the second slurries, control grouting pressure is 0.5~1.5Mpa, and flow rate of grouting is 13~15L/min;Continue to retreat the second slip casting Pipe, circuits sequentially;When Grouting Pipe retreats to 1.5m, the first slurries are injected;Next slip casting is moved to using every hole injection mode after the completion Hole is moved to before next injected hole starts slip casting, the slip casting time of two Grouting Pipes need to be checked, convenient for controlling the slurry of dual slurry Liquor ratio;Grouting Pipe is rinsed with clear-water high-pressure after the completion of slip casting, can prevent remaining slurries from consolidating in slip casting inside pipe wall, Grouting Pipe is blocked in next slip casting.
It should be noted that the processing of following several situations during slip casting:
(1) grout: will conscientiously observe the situation of change of earth's surface and adjacent lines during slip casting, due to the entrance of slurries, Cause formation variation, closes the lower place of intensity, may emerge slurries first, it thus needs to be blocked at grout, Intermittent slip casting is taken, can guarantee that slurries effectively inject stratum.
(2) grouting pressure changes: during slip casting, pressure will be controlled within above range, too large or too small Pressure be not able to satisfy construction needs, in place of lasting hypotony needs to check whether there is spillage, pressure flies up need It checks whether and blocks.
(3) grouting amount adjust: the grouting amount on stratum whether be properly stratum consolidation effect embodiment, using every hole injection side Formula, not only can influencing each other to avoid injected hole, but also can make grouting behind shaft or drift lining hole supplement before injected hole, guarantee the soil body in slurries diffusion Uniformly.
The setting time of dual slurry is as shown in table 1 in embodiment 1 and comparative example 1-3
The setting time of dual slurry in 1 embodiment 1 of table and comparative example 1-3
The first additive is added in the first slurries in embodiment 1, the second additive is added in the second slurries, dual slurry Presetting period and final setting time are shorter, can achieve the effect that make dual slurry rapid condensation;In comparative example 1 in first slurries The first additive is not used, and has used the second additive in the second slurries, the presetting period of dual slurry and final setting time ratio Extended in embodiment 1;The first additive has been used in first slurries in comparative example 2, and has not been used in the second slurries Second additive, the presetting period of dual slurry and final setting time in embodiment 1 than also being extended;First slurry in comparative example 3 The first additive is not used in liquid, does not also use the second additive, the presetting period of dual slurry and final set in the second slurries Time is more more than extending in embodiment 1, therefore the first additive is added in the first slurries, adds outside second in the second slurries Add agent, can achieve the effect that dual slurry is made to read condensation fastly.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications It should be regarded as protection scope of the present invention.

Claims (9)

1. a kind of constructing tunnel dual slurry grouting construction method, it is characterised in that: the following steps are included:
(1) prepare and check equipment: according to surface state to be onstructed, haulage equipment, and checking whether equipment works well;
(2) surface drilling: being drilled using water drilling puncher and arranges that injected hole in blossom type, is drilling through outermost note When starching hole, the outer limb of dilling angle is 9~11 °, and digs gutter;
The aperture of injected hole is 0.42m, and the distance of adjacent two injected holes is 0.35m, and hole location maximum deviation should be 0.05m;
Drilling depth should reach design grouting reinforcement depth, while borehole perpendicularity error is less than 0.45%;
When reaching predetermined depth, injected hole is rinsed with maximum pressure and seals the nozzle of Grouting Pipe;
(3) slurries: the first slurries are prepared: being uniformly mixed by mixed liquor, cement and the first additive that mass ratio is 1:1:0.15 It is made;
Mixed liquor is that the water that mass ratio is 1:0.1 and retarder are uniformly mixed and are made;
First additive is polyacrylic acid, polymethylacrylic acid and ortho-aminophenol the mixing system for being 1:1:1 by mass ratio At;
Second slurries: it is uniformly mixed and is made by water glass solution, prodan and the second additive that mass ratio is 1:1:0.16;
The water glass solution is that 43 Baume degrees are diluted with water to 35 Baume degrees, modulus 2.9-3.1 by concentration;
Second additive is mixed by calcium sulfate, aluminium powder and sodium metaaluminate that mass ratio is 1:2:2;
(4) slip casting: when the first slurries of injection, control grouting pressure is 0.5~1.5Mpa, and flow rate of grouting is 14~15L/min;
The first Grouting Pipe 1.5m is retreated, continues to inject the second slurries, control grouting pressure is 0.5~1.5Mpa, and flow rate of grouting is 13~15L/min;
Continue to retreat the second Grouting Pipe, circuit sequentially;
When Grouting Pipe retreats to 1.5m, the first slurries are injected;Next injected hole is moved to using every hole injection mode after the completion.
2. constructing tunnel according to claim 1 dual slurry grouting construction method, it is characterised in that: second slurries In further include glass-cermic powder, alum and thinner, waterglass, glass-cermic powder, alum and thinner mass ratio are 1:0.2:0.5:0.8.
3. constructing tunnel according to claim 2 dual slurry grouting construction method, it is characterised in that: the thinner packet Include one or more of potassium bichromate, sodium nitrite and triethanolamine.
4. constructing tunnel according to claim 1 dual slurry grouting construction method, it is characterised in that: the retarder is Refer to sodium tripolyphosphate.
5. constructing tunnel according to claim 1 dual slurry grouting construction method, it is characterised in that: the step (3) In the first slurries after the completion of preparation, need to pour into deposit in stock tank and filter.
6. constructing tunnel according to claim 1 dual slurry grouting construction method, it is characterised in that: the step (4) In in slip casting by near Grouting Pipe water discharging valve open.
7. constructing tunnel according to claim 1 dual slurry grouting construction method, it is characterised in that: the step (4) The Grouting Pipe that slip casting is completed need to be rinsed with clear-water high-pressure.
8. constructing tunnel according to claim 1 dual slurry grouting construction method, it is characterised in that: the step (4) In be respectively mounted valve and meter in two Grouting Pipes.
9. constructing tunnel according to claim 1 dual slurry grouting construction method, it is characterised in that: the step (4) Middle Grouting Pipe moves on to before next injected hole starts slip casting, to verify the slip casting time of adjacent two Grouting Pipes.
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CN110453672B (en) * 2019-08-16 2021-07-30 上海市基础工程集团有限公司 Loose shallow earth covering double-liquid grouting reinforcement method
CN112963158A (en) * 2021-05-18 2021-06-15 北京城建道桥建设集团有限公司 Double-liquid grouting method and slurry for pore stratum

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CN106639973A (en) * 2016-12-19 2017-05-10 中铁建大桥工程局集团第二工程有限公司 Grouting structure and grouting method for ground surface ultra-deep hole double liquid slurry grouting
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CN1709821A (en) * 2005-06-08 2005-12-21 张振秋 Cement-base dual-liquid slip-casting material
CN101935198A (en) * 2010-09-12 2011-01-05 上海市第二市政工程有限公司 Environment-friendly shield construction single-liquid synchronous grouting slurry
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