CN107827422B - High-waterproof synchronous grouting slurry for submarine shield tunnel - Google Patents
High-waterproof synchronous grouting slurry for submarine shield tunnel Download PDFInfo
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- CN107827422B CN107827422B CN201711193085.XA CN201711193085A CN107827422B CN 107827422 B CN107827422 B CN 107827422B CN 201711193085 A CN201711193085 A CN 201711193085A CN 107827422 B CN107827422 B CN 107827422B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/10—Lime cements or magnesium oxide cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00732—Uses not provided for elsewhere in C04B2111/00 for soil stabilisation
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
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Abstract
The invention provides novel high-waterproof synchronous grouting slurry for a submarine shield tunnel, which comprises the following raw materials in percentage by weight: 7.0-9.5% of a cementing material, 14.5-17.5% of ground limestone powder, 2.6-4.2% of sodium bentonite, 55-60% of river sand, 3.0% of a waterproof agent, 1.0% of a water reducing agent, 0.5% of hydroxypropyl methyl cellulose, 0.1% of polyacrylamide, 0.03% of a gas-entraining agent and the balance of water, wherein the waterproof agent is the cementing material; the cementing material comprises cement and slaked lime, and the mass ratio of the cement to the slaked lime is 4.0-5.5: 3.0-4.0. The grouting slurry provided by the invention has higher waterproof capability, higher early shear strength and strong seawater penetration resistance, and can provide certain shear resistance, so that the problems of floating, cracking and water seepage of the duct piece can be effectively solved, and the effect of stabilizing the duct piece is achieved.
Description
Technical Field
The invention relates to the field of building materials, in particular to high-waterproof synchronous grouting slurry for a submarine shield tunnel.
Background
The shield tunnel construction is more and more common in the construction of urban subways and high-speed railways, and particularly shows the superiority of the shield tunnel construction when crossing rivers, gulfs and other areas. Synchronous slip casting is the key link of shield construction success, and the gap between the back of the section of jurisdiction and the stratum is filled to the thick liquid to stabilize the section of jurisdiction, form a layer of waterproof layer simultaneously, play the effect that prevents groundwater infiltration.
When shield construction is carried out in a bay area, due to the fact that stratum contains rich water and underground water has a salt damage effect, the pipe piece often floats upwards, cracks and seeps water after the pipe piece is pushed out of the shield tail of a shield machine. However, the traditional slurry is long in gelling time, high in water precipitation rate and poor in underground water corrosion resistance, stratum water content is supplemented in a short time after grouting, the buoyancy effect of the segment is increased, the segment is more prone to floating and cracking, once the segment cracks, seawater enters the concrete through the cracks, serious corrosion is caused to reinforcing steel bars, the service life of the structure is greatly reduced, the structure safety is endangered, and huge potential safety hazards are brought.
At present, the shield synchronous grouting in China still mainly takes cement (added with fly ash) mortar as the main material, the slurry has good fluidity, but the calculus rate is low, the dilution resistance is poor, the slurry is very easy to dilute in a stratum with abundant underground water, the slurry cannot be condensed for a long time, the shrinkage rate is large after solidification, and a larger gap exists behind a pipe piece. The buoyancy that the section of jurisdiction received after deviating from the shield tail is relevant with the volume of row boiling water, and this kind of thick liquid is hardly providing anti-shear force after being diluted, not only can not resist the section of jurisdiction come-up, has increased the water content in the stratum even, causes the section of jurisdiction come-up more easily. The European countries mostly adopt inert slurry, lime is taken as a cementing material, the slurry has the characteristics of long available time and small volume shrinkage, but has the defects that: 1) the early strength is low, the early shear resistance value is low, and the stability of the shield segment in the water-rich stratum is not facilitated. 2) The slurry slump is small, the construction is inconvenient, and the pipe is easy to block. 3) When the slump is large, the anti-dilution capability is poor, and the pipe piece is easy to be diluted in a water-rich stratum and cannot be stabilized. The method adopts double-liquid slurry in Japan and takes cement mortar and water glass as raw materials, and has the following disadvantages: 1) the construction is complex, and the requirement on the operation level of construction machines and personnel is high; 2) the pipe is easy to block, the popularization is inconvenient, and the domestic construction is less.
Therefore, in order to solve the above problems, a novel highly waterproof synchronous grouting slurry for a submarine shield tunnel is in urgent need of research.
Disclosure of Invention
In view of the above, the invention provides the high-waterproof synchronous grouting slurry for the submarine shield tunnel, which has long slurry setting time and good grouting property, can effectively fill gaps behind the segment walls, has good slurry stability, low water precipitation rate and excellent corrosion resistance, and can provide a certain shearing resistance force, thereby effectively solving the problems of floating, cracking and water seepage of the segment, playing a role in stabilizing the segment, and providing a powerful technical guarantee for the shield machine to smoothly tunnel.
The invention provides high-waterproof synchronous grouting slurry for a submarine shield tunnel, which comprises the following raw materials in percentage by weight: 7.0-9.5% of a cementing material, 14.5-17.5% of ground limestone powder, 2.6-4.2% of sodium bentonite, 55-60% of river sand, 3.0% of a waterproof agent, 1.0% of a water reducing agent, 0.5% of hydroxypropyl methyl cellulose, 0.1% of polyacrylamide, 0.03% of a gas-entraining agent and the balance of water, wherein the waterproof agent is the cementing material;
the cementing material comprises cement and slaked lime, and the mass ratio of the cement to the slaked lime is 4.0-5.5: 3.0-4.0;
further, the slurry raw material comprises, by weight, 8.5% of a cementing material, 16.0% of ground limestone powder, 3.5% of sodium bentonite, 57.5% of river sand, 0.255% of a waterproofing agent, 0.085% of a water reducing agent, 0.0425% of hydroxypropyl methyl cellulose, 0.0085% of polyacrylamide, 0.00255% of an air entraining agent and 14.10645% of water;
the cementing material comprises cement and slaked lime, and the mass ratio of the cement to the slaked lime is 5.0: 3.5;
further, the fineness modulus of the river sand is 1.6-3.0;
further, the mass percentage of the montmorillonite in the sodium bentonite is 80-90%; the granularity of the sodium bentonite is 150-200 meshes, and the expansion rate is 20-30 ml/g;
further, the waterproof agent is a higher fatty acid waterproof agent; the water reducing agent is a polycarboxylic acid water reducing agent, and the water reducing rate is more than or equal to 25%; the air entraining agent is a triterpenoid saponin air entraining agent;
further, the granularity of the ground limestone powder is 150-180 meshes;
further, the cement is ordinary portland cement;
further, the particle size of the slaked lime is 200-300 meshes, the content of CaO and MgO in the slaked lime is more than or equal to 90 percent, and the content of sulfur trioxide is less than or equal to 2 percent;
further, the particle size of the hydroxypropyl methyl cellulose is 100-120 meshes, and the specific gravity is 1.26-1.30; the granularity of the polyacrylamide is 100-120 meshes;
further, the preparation method of the grouting slurry comprises the following steps: firstly adding hydroxypropyl methyl cellulose, polyacrylamide, an air entraining agent, a waterproof agent and a water reducing agent into water, uniformly stirring, then mixing with cement, ground limestone powder, slaked lime, sodium bentonite and river sand, and uniformly stirring for at least 150 s.
The invention has the beneficial effects that:
the grouting slurry prepared by the method has high early shear strength, and can effectively inhibit the upward floating of the duct piece; the injectability is good, the construction is simple and convenient, and the pipe is not easy to block; the requirements on the level of grouting machines and workers are not high; after the slurry is hardened, the volume is not shrunk, and gaps behind the pipe piece can be effectively filled.
The invention adopts proper raw material components, prepares synchronous grouting slurry by matching reasonable proportion, takes cement and slaked lime as cementing materials, takes stone powder as filling materials and river sand as aggregate, and realizes the grouting property and stability of the slurry by adding and adjusting the dosage of additives; limestone powder is used as a filling material to replace the fly ash adopted at present, so that the technical problems that the quality fluctuation of the fly ash influences the setting time of the slurry, the water consumption of the slurry and the construction are influenced are effectively solved. Limestone powder is adopted, so that the price is low, the construction cost of shield grouting is greatly reduced, and the problem of environmental pollution caused by treatment of the limestone powder as waste is solved; meanwhile, the ground limestone powder is used as a filler, so that the limestone powder can play a lubricating role like fly ash, and the prepared slurry has good fluidity; in addition, the limestone powder is a complete inert admixture, so that the problems of volume shrinkage and the like do not occur when the slurry is prepared, the filling coefficient is high, and the slurry is stable.
The novel grouting material is prepared by combining various materials, the synchronous grouting slurry has good grouting property, can effectively fill gaps behind duct piece walls, has good slurry stability, high calculus rate and low water precipitation rate, has good dilution resistance, and can provide certain shearing resistance after the slurry is injected, so that the upward floating of duct pieces is inhibited, the effect of stabilizing the duct pieces is achieved, the problems of duct piece cracking and water seepage are solved, and the shield tunneling speed is accelerated. By adopting the grouting slurry formula provided by the invention, raw material components in the prepared slurry can be well mixed and dispersed, and can play a synergistic role, so that the prepared slurry has excellent performance, can meet the construction requirements of a submarine shield tunnel, and has the purposes of stabilizing duct pieces, preventing the duct pieces from floating upwards, resisting seawater erosion and preventing duct pieces from leaking, thereby providing a powerful technical guarantee for the smooth tunneling of a shield machine.
Detailed Description
The high-waterproof synchronous grouting slurry for the submarine shield tunnel provided by the embodiment comprises the following raw materials in percentage by weight: 7.0-9.5% of a cementing material, 14.5-17.5% of ground limestone powder, 2.6-4.2% of sodium bentonite, 55-60% of river sand, 3.0% of a waterproof agent, 1.0% of a water reducing agent, 0.5% of hydroxypropyl methyl cellulose, 0.1% of polyacrylamide, 0.03% of a gas-entraining agent and the balance of water, wherein the waterproof agent is the cementing material;
the cementing material comprises cement and slaked lime, and the mass ratio of the cement to the slaked lime is 4.0-5.5: 3.0-4.0.
Preferably, the slurry raw material comprises the following components, by weight, 8.5% of a cementing material, 16.0% of ground limestone powder, 3.5% of sodium bentonite, 57.5% of river sand, 0.255% of a water-proofing agent, 0.085% of a water reducing agent, 0.0425% of hydroxypropyl methyl cellulose, 0.0085% of polyacrylamide, 0.00255% of an air entraining agent and 14.10645% of water;
the cementing material comprises cement and slaked lime, and the mass ratio of the cement to the slaked lime is 5.0: 3.5; the method adopts appropriate raw material components and prepares synchronous grouting slurry by matching reasonable proportion, organically integrates the raw material components into a whole, and prepares the synchronous grouting slurry strictly according to the grouting formula provided by the embodiment, so that the raw material components can be fully reacted, the interaction among the raw material components can be better exerted, and the high waterproof synchronous grouting slurry for the submarine shield tunnel, which has high waterproof capability and high early shear strength, strong seawater penetration resistance and good stability, can be prepared, and simultaneously can provide certain shear strength, thereby effectively solving the problems of upward floating and cracking water seepage of the duct piece, playing the role of stabilizing the duct piece, and providing powerful technical support for the shield machine to smoothly tunnel. The slurry prepared by the embodiment has long setting time, long service life of 8-12h, favorable field construction, good slurry fluidity, convenient pumping and good slurry injectability, and can effectively fill gaps behind the segment walls; the slurry has good stability, low water precipitation rate and excellent corrosion resistance, does not generate segregation and precipitation during long-distance transportation, and meets the requirement of long-distance multiple transportation; the slurry filling property is good, a large amount of inert admixture is used for grinding limestone powder, the volume of the hardened mortar basically has no shrinkage, gaps behind the segment wall are effectively filled, and the effects of stabilizing the segment and inhibiting floating are achieved; the polyacrylamide has a very good water retention effect, can greatly improve the durability of the grouting, such as seawater dilution resistance, salt crystallization damage resistance and the like after being mixed with other components, and is suitable for the construction of the long and large submarine shield tunnel. In addition, the raw material components adopted by the embodiment are low in price, so that the construction cost is greatly reduced, and the method has good social and economic benefits.
In the embodiment, the fineness modulus of the river sand is 1.6-3.0; the river sand is used as the slurry aggregate, can be mutually cooperated with other raw material components in the slurry after being fully mixed, improves the strength of the slurry, simultaneously overcomes the problem of poor water retention caused by large particles of the river sand, and has wide sources, low price and good economic benefit.
In the embodiment, the mass percentage of the montmorillonite in the sodium bentonite is 80-90%; the granularity of the sodium bentonite is 150-200 meshes, and the expansion rate is 20-30 ml/g; the sodium bentonite has excellent physical and chemical properties, can be well dispersed in the slurry, and is synergistic with other raw material components in the slurry so as to further improve the fluidity, stability, waterproofness, viscosity and the like of the slurry.
In the embodiment, the waterproof agent is a higher fatty acid waterproof agent; the water reducing agent is a polycarboxylic acid water reducing agent, and the water reducing rate is more than or equal to 25%; the air entraining agent is a triterpenoid saponin air entraining agent; can be cooperated with other raw material components to prepare high-waterproof synchronous grouting slurry with excellent performance.
In this embodiment, the particle size of the ground limestone powder is 150-180 mesh; easy to disperse.
In this embodiment, the cement is ordinary portland cement.
In the embodiment, the particle size of the slaked lime is 200-300 meshes, the content of CaO + MgO in the slaked lime is more than or equal to 90%, and the content of sulfur trioxide is less than or equal to 2%;
in the embodiment, the particle size of the hydroxypropyl methyl cellulose is 100-120 meshes, and the specific gravity is 1.26-1.30; the particle size of the polyacrylamide is 100-120 meshes.
In this embodiment, the preparation method of the grouting slurry includes the following steps: firstly adding hydroxypropyl methyl cellulose, polyacrylamide, an air entraining agent, a waterproof agent and a water reducing agent into water, uniformly stirring, then mixing with cement, ground limestone powder, slaked lime, sodium bentonite and river sand, and uniformly stirring for at least 150 s.
In this embodiment, the raw material components of the slurry are purchased through the market, and are not described herein again.
The following are specific examples:
example one
The high-waterproof synchronous grouting slurry for the submarine shield tunnel provided by the embodiment comprises the following raw materials in percentage by weight: 8.0% of a cementing material, 16.0% of ground limestone powder (150 meshes), 3.5% of sodium bentonite (200 meshes), 58.0% of river sand, 0.240% of a higher fatty acid waterproof agent, 0.080% of a polycarboxylic acid water reducing agent, 0.040% of hydroxypropyl methyl cellulose (100 meshes), 0.0080% of polyacrylamide (100 meshes), 0.0024% of a triterpenoid saponin air entraining agent and 14.1296% of water;
the cementing material comprises ordinary portland cement and slaked lime (200 meshes), and the mass ratio of the ordinary portland cement to the slaked lime is 4.6: 3.4.
in this embodiment:
the fineness modulus of the river sand is 2.1;
the mass percentage of the montmorillonite in the sodium bentonite is 90%, and the swelling rate of the sodium bentonite is 25 ml/g;
the water reducing rate of the water reducing agent is more than or equal to 25 percent; the specific gravity of the hydroxypropyl methylcellulose is 1.26;
the content of CaO and MgO in the slaked lime is more than or equal to 90 percent, and the content of sulfur trioxide is less than or equal to 2 percent.
In this embodiment, the preparation method of the grouting slurry includes the following steps: firstly, adding hydroxypropyl methyl cellulose, polyacrylamide, a triterpenoid saponin air entraining agent, a higher fatty acid waterproofing agent and a polycarboxylic acid water reducing agent into water, uniformly stirring, and then uniformly mixing with cement, limestone powder, slaked lime, sodium bentonite and river sand, and stirring for 150 seconds.
Example two
The high-waterproof synchronous grouting slurry for the submarine shield tunnel provided by the embodiment comprises the following raw materials in percentage by weight: 8.6% of a cementing material, 17.0% of ground limestone powder (180 meshes), 2.9% of sodium bentonite (150 meshes), 57.0% of river sand, 0.258% of a higher fatty acid waterproof agent, 0.086% of a polycarboxylic acid water reducing agent, 0.043% of hydroxypropyl methyl cellulose (100 meshes), 0.0086% of polyacrylamide (100 meshes), 0.00258% of a triterpenoid saponin air entraining agent and 14.10182% of water;
the cementing material comprises ordinary portland cement and slaked lime (300 meshes), and the mass ratio of the ordinary portland cement to the slaked lime is 5.0: 3.6.
in this embodiment:
the fineness modulus of the river sand is 1.7;
the mass percentage of the montmorillonite in the sodium bentonite is 90%, and the swelling rate of the sodium bentonite is 20 ml/g;
the water reducing rate of the water reducing agent is more than or equal to 25 percent; the specific gravity of the hydroxypropyl methyl cellulose is 1.28;
the content of CaO and MgO in the slaked lime is more than or equal to 90 percent, and the content of sulfur trioxide is less than or equal to 2 percent.
In this embodiment, the preparation method of the grouting slurry includes the following steps: firstly, adding hydroxypropyl methyl cellulose, polyacrylamide, a triterpenoid saponin air entraining agent, a higher fatty acid waterproofing agent and a polycarboxylic acid water reducing agent into water, uniformly stirring, and then uniformly mixing with cement, limestone powder, slaked lime, sodium bentonite and river sand, and stirring for 150 seconds.
EXAMPLE III
The high-waterproof synchronous grouting slurry for the submarine shield tunnel provided by the embodiment comprises the following raw materials in percentage by weight: 7.9% of a cementing material, 16.5% of ground limestone powder (180 meshes), 3.4% of sodium bentonite (150 meshes), 58.0% of river sand, 0.237% of a higher fatty acid waterproof agent, 0.079% of a polycarboxylic acid water reducing agent, 0.0395% of hydroxypropyl methyl cellulose (100 meshes), 0.0079% of polyacrylamide (100 meshes), 0.00237% of a triterpenoid saponin air entraining agent and 13.83423% of water;
the cementing material comprises ordinary portland cement and slaked lime (200 meshes), and the mass ratio of the ordinary portland cement to the slaked lime is 4.2: 3.7.
in this embodiment:
the fineness modulus of the river sand is 2.2;
the mass percentage of the montmorillonite in the sodium bentonite is 80%, and the swelling rate of the sodium bentonite is 30 ml/g;
the water reducing rate of the water reducing agent is more than or equal to 25 percent; the specific gravity of the hydroxypropyl methyl cellulose is 1.30;
the content of CaO and MgO in the slaked lime is more than or equal to 90 percent, and the content of sulfur trioxide is less than or equal to 2 percent.
In this embodiment, the preparation method of the grouting slurry includes the following steps: firstly, adding hydroxypropyl methyl cellulose, polyacrylamide, a triterpenoid saponin air entraining agent, a higher fatty acid waterproofing agent and a polycarboxylic acid water reducing agent into water, uniformly stirring, and then uniformly mixing with cement, limestone powder, slaked lime, sodium bentonite and river sand, and stirring for 150 seconds.
Example four
The high-waterproof synchronous grouting slurry for the submarine shield tunnel provided by the embodiment comprises the following raw materials in percentage by weight: 8.3% of a cementing material, 17.0% of ground limestone powder (150 meshes), 3.9% of sodium bentonite (200 meshes), 57.5% of river sand, 0.249% of a higher fatty acid waterproof agent, 0.083% of a polycarboxylic acid water reducing agent, 0.0415% of hydroxypropyl methyl cellulose (100 meshes), 0.0083% of polyacrylamide (100 meshes), 0.00249% of a triterpenoid saponin air entraining agent and 12.91571% of water;
the cementing material comprises ordinary portland cement and slaked lime (200 meshes), and the mass ratio of the ordinary portland cement to the slaked lime is 4.9: 3.4.
in this embodiment:
the fineness modulus of the river sand is 2.1;
the mass percentage of the montmorillonite in the sodium bentonite is 80%, and the swelling rate of the sodium bentonite is 25 ml/g;
the water reducing rate of the water reducing agent is more than or equal to 25 percent; the specific gravity of the hydroxypropyl methyl cellulose is 1.28;
the content of CaO and MgO in the slaked lime is more than or equal to 90 percent, and the content of sulfur trioxide is less than or equal to 2 percent.
In this embodiment, the preparation method of the grouting slurry includes the following steps: firstly, adding hydroxypropyl methyl cellulose, polyacrylamide, a triterpenoid saponin air entraining agent, a higher fatty acid waterproofing agent and a polycarboxylic acid water reducing agent into water, uniformly stirring, and then uniformly mixing with cement, limestone powder, slaked lime, sodium bentonite and river sand, and stirring for 150 seconds.
EXAMPLE five
The high-waterproof synchronous grouting slurry for the submarine shield tunnel provided by the embodiment comprises the following raw materials in percentage by weight: 9.2% of a cementing material, 15.8% of ground limestone powder (150 meshes), 3.6% of sodium bentonite (200 meshes), 57.0% of river sand, 0.276% of a higher fatty acid waterproof agent, 0.092% of a polycarboxylic acid water reducing agent, 0.046% of hydroxypropyl methyl cellulose (100 meshes), 0.0092% of polyacrylamide (100 meshes), 0.00276% of a triterpenoid saponin air entraining agent and 13.97404% of water;
the cementing material comprises ordinary portland cement and slaked lime (300 meshes), and the mass ratio of the ordinary portland cement to the slaked lime is 5.4: 3.8.
in this embodiment:
the fineness modulus of the river sand is 2.6;
the mass percentage of the montmorillonite in the sodium bentonite is 85%, and the swelling rate of the sodium bentonite is 30 ml/g;
the water reducing rate of the water reducing agent is more than or equal to 25 percent; the specific gravity of the hydroxypropyl methylcellulose is 1.26;
the content of CaO and MgO in the slaked lime is more than or equal to 90 percent, and the content of sulfur trioxide is less than or equal to 2 percent.
In this embodiment, the preparation method of the grouting slurry includes the following steps: firstly, adding hydroxypropyl methyl cellulose, polyacrylamide, a triterpenoid saponin air entraining agent, a higher fatty acid waterproofing agent and a polycarboxylic acid water reducing agent into water, uniformly stirring, and then uniformly mixing with cement, limestone powder, slaked lime, sodium bentonite and river sand, and stirring for 150 seconds.
EXAMPLE six
The high-waterproof synchronous grouting slurry for the submarine shield tunnel provided by the embodiment comprises the following raw materials in percentage by weight: 8.4% of a cementing material, 17.2% of ground limestone powder (150 meshes), 3.0% of sodium bentonite (200 meshes), 56.5% of river sand, 0.252% of a higher fatty acid waterproof agent, 0.084% of a polycarboxylic acid water reducing agent, 0.042% of hydroxypropyl methyl cellulose (100 meshes), 0.0084% of polyacrylamide (100 meshes), 0.00252% of a triterpenoid saponin air entraining agent and 14.51108% of water;
the cementing material comprises ordinary portland cement and slaked lime (200 meshes), and the mass ratio of the ordinary portland cement to the slaked lime is 4.4: 4.0.
in this embodiment:
the fineness modulus of the river sand is 1.9;
the mass percentage of the montmorillonite in the sodium bentonite is 90%, and the swelling rate of the sodium bentonite is 30 ml/g;
the water reducing rate of the water reducing agent is more than or equal to 25 percent; the specific gravity of the hydroxypropyl methyl cellulose is 1.30;
the content of CaO and MgO in the slaked lime is more than or equal to 90 percent, and the content of sulfur trioxide is less than or equal to 2 percent.
In this embodiment, the preparation method of the grouting slurry includes the following steps: firstly, adding hydroxypropyl methyl cellulose, polyacrylamide, a triterpenoid saponin air entraining agent, a higher fatty acid waterproofing agent and a polycarboxylic acid water reducing agent into water, uniformly stirring, and then uniformly mixing with cement, limestone powder, slaked lime, sodium bentonite and river sand, and stirring for 150 seconds.
EXAMPLE seven
The high-waterproof synchronous grouting slurry for the submarine shield tunnel provided by the embodiment comprises the following raw materials in percentage by weight: 8.5% of a cementing material, 16.0% of ground limestone powder (150 meshes), 3.5% of sodium bentonite (200 meshes), 57.5% of river sand, 0.255% of a higher fatty acid waterproof agent, 0.085% of a polycarboxylic acid water reducing agent, 0.0425% of hydroxypropyl methyl cellulose (100 meshes), 0.0085% of polyacrylamide (100 meshes), 0.00255% of a triterpenoid saponin air entraining agent and 14.10645% of water;
the cementing material comprises ordinary portland cement and slaked lime (200 meshes), and the mass ratio of the ordinary portland cement to the slaked lime is 5.0: 3.5.
in this embodiment:
the fineness modulus of the river sand is 1.6;
the mass percentage of the montmorillonite in the sodium bentonite is 90%, and the swelling rate of the sodium bentonite is 30 ml/g;
the water reducing rate of the water reducing agent is more than or equal to 25 percent; the specific gravity of the hydroxypropyl methyl cellulose is 1.30;
the content of CaO and MgO in the slaked lime is more than or equal to 90 percent, and the content of sulfur trioxide is less than or equal to 2 percent.
In this embodiment, the preparation method of the grouting slurry includes the following steps: firstly, adding hydroxypropyl methyl cellulose, polyacrylamide, a triterpenoid saponin air entraining agent, a higher fatty acid waterproofing agent and a polycarboxylic acid water reducing agent into water, uniformly stirring, and then uniformly mixing with cement, limestone powder, slaked lime, sodium bentonite and river sand, and stirring for 150 seconds.
Example eight
The high-waterproof synchronous grouting slurry for the submarine shield tunnel provided by the embodiment comprises the following raw materials in percentage by weight: 9.5% of a cementing material, 17.5% of ground limestone powder (150 meshes), 4.2% of sodium bentonite (200 meshes), 55.0% of river sand, 0.285% of a higher fatty acid waterproof agent, 0.095% of a polycarboxylic acid water reducing agent, 0.0475% of hydroxypropyl methyl cellulose (120 meshes), 0.0095% of polyacrylamide (120 meshes), 0.00285% of a triterpenoid saponin air entraining agent and 13.36015% of water;
the cementing material comprises ordinary portland cement and slaked lime (200 meshes), and the mass ratio of the ordinary portland cement to the slaked lime is 5.5: 4.0.
in this embodiment:
the fineness modulus of the river sand is 3.0;
the mass percentage of the montmorillonite in the sodium bentonite is 80%, and the swelling rate of the sodium bentonite is 20 ml/g;
the water reducing rate of the water reducing agent is more than or equal to 25 percent; the specific gravity of the hydroxypropyl methyl cellulose is 1.30;
the content of CaO and MgO in the slaked lime is more than or equal to 90 percent, and the content of sulfur trioxide is less than or equal to 2 percent.
In this embodiment, the preparation method of the grouting slurry includes the following steps: firstly, adding hydroxypropyl methyl cellulose, polyacrylamide, a triterpenoid saponin air entraining agent, a higher fatty acid waterproofing agent and a polycarboxylic acid water reducing agent into water, uniformly stirring, and then uniformly mixing with cement, limestone powder, slaked lime, sodium bentonite and river sand, and stirring for 150 seconds.
Example nine
The high-waterproof synchronous grouting slurry for the submarine shield tunnel provided by the embodiment comprises the following raw materials in percentage by weight: 7.0% of a cementing material, 14.5% of ground limestone powder (150 meshes), 2.6% of sodium bentonite (200 meshes), 60.0% of river sand, 0.210% of a higher fatty acid waterproof agent, 0.070% of a polycarboxylic acid water reducing agent, 0.0350% of hydroxypropyl methyl cellulose (120 meshes), 0.0070% of polyacrylamide (120 meshes), 0.00210% of a triterpenoid saponin air entraining agent and 15.57590% of water;
the cementing material comprises ordinary portland cement and slaked lime (200 meshes), and the mass ratio of the ordinary portland cement to the slaked lime is 4.0: 3.0.
in this embodiment:
the fineness modulus of the river sand is 1.9;
the mass percentage of the montmorillonite in the sodium bentonite is 90%, and the swelling rate of the sodium bentonite is 30 ml/g;
the water reducing rate of the water reducing agent is more than or equal to 25 percent; the specific gravity of the hydroxypropyl methyl cellulose is 1.30;
the content of CaO and MgO in the slaked lime is more than or equal to 90 percent, and the content of sulfur trioxide is less than or equal to 2 percent.
In this embodiment, the preparation method of the grouting slurry includes the following steps: firstly, adding hydroxypropyl methyl cellulose, polyacrylamide, a triterpenoid saponin air entraining agent, a higher fatty acid waterproofing agent and a polycarboxylic acid water reducing agent into water, uniformly stirring, and then uniformly mixing with cement, limestone powder, slaked lime, sodium bentonite and river sand, and stirring for 150 seconds.
The high-waterproof synchronous grouting slurry for the submarine shield tunnel prepared in the embodiment is subjected to performance test, and the results are as follows:
note: the water dispersion resistance was evaluated by the mortar loss rate in water.
The above table shows that the grouting slurry prepared by the invention has good groutability, good stability, high calculus rate, low water precipitation rate, and good dilution resistance, impermeability and strength.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (10)
1. The utility model provides a high waterproof synchronous slip casting thick liquid for seabed shield tunnel which characterized in that: the slurry comprises the following raw materials in percentage by weight: 7.0-9.5% of a cementing material, 14.5-17.5% of ground limestone powder, 2.6-4.2% of sodium bentonite, 55-60% of river sand, 3.0% of a waterproof agent, 1.0% of a water reducing agent, 0.5% of hydroxypropyl methyl cellulose, 0.1% of polyacrylamide, 0.03% of a gas-entraining agent and the balance of water, wherein the waterproof agent is the cementing material;
the cementing material comprises cement and slaked lime, and the mass ratio of the cement to the slaked lime is 4.0-5.5: 3.0-4.0.
2. The highly waterproof synchronous grouting slurry for the submarine shield tunnel according to claim 1, wherein: the slurry raw material comprises, by weight, 8.5% of a cementing material, 16.0% of ground limestone powder, 3.5% of sodium bentonite, 57.5% of river sand, 0.255% of a waterproof agent, 0.085% of a water reducing agent, 0.0425% of hydroxypropyl methyl cellulose, 0.0085% of polyacrylamide, 0.00255% of an air entraining agent and 14.10645% of water;
the cementing material comprises cement and slaked lime, and the mass ratio of the cement to the slaked lime is 5.0: 3.5.
3. the highly waterproof synchronous grouting slurry for a submarine shield tunnel according to claim 1 or 2, characterized in that: the fineness modulus of the river sand is 1.6-3.0.
4. The highly waterproof synchronous grouting slurry for a submarine shield tunnel according to claim 1 or 2, characterized in that: the mass percentage of the montmorillonite in the sodium bentonite is 80-90%; the granularity of the sodium bentonite is 150-200 meshes, and the expansion rate is 20-30 ml/g.
5. The highly waterproof synchronous grouting slurry for a submarine shield tunnel according to claim 1 or 2, characterized in that: the waterproof agent is a higher fatty acid waterproof agent; the water reducing agent is a polycarboxylic acid water reducing agent, and the water reducing rate is more than or equal to 25%; the air entraining agent is triterpenoid saponin air entraining agent.
6. The highly waterproof synchronous grouting slurry for a submarine shield tunnel according to claim 1 or 2, characterized in that: the granularity of the ground limestone powder is 150-180 meshes.
7. The highly waterproof synchronous grouting slurry for a submarine shield tunnel according to claim 1 or 2, characterized in that: the cement is ordinary portland cement.
8. The highly waterproof synchronous grouting slurry for a submarine shield tunnel according to claim 1 or 2, characterized in that: the particle size of the slaked lime is 200-300 meshes, the content of CaO and MgO in the slaked lime is more than or equal to 90 percent, and the content of sulfur trioxide is less than or equal to 2 percent.
9. The highly waterproof synchronous grouting slurry for a submarine shield tunnel according to claim 1 or 2, characterized in that: the granularity of the hydroxypropyl methyl cellulose is 100-120 meshes, and the specific gravity is 1.26-1.30; the particle size of the polyacrylamide is 100-120 meshes.
10. The highly waterproof synchronous grouting slurry for a submarine shield tunnel according to claim 1 or 2, characterized in that: the preparation method of the grouting slurry comprises the following steps: firstly adding hydroxypropyl methyl cellulose, polyacrylamide, an air entraining agent, a waterproof agent and a water reducing agent into water, uniformly stirring, then mixing with cement, ground limestone powder, slaked lime, sodium bentonite and river sand, and uniformly stirring for at least 150 s.
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| CN108868781A (en) * | 2018-05-28 | 2018-11-23 | 中铁五局集团有限公司 | A kind of shield construction method for shale sandy silt soil stratum |
| CN109503089A (en) * | 2019-01-07 | 2019-03-22 | 中铁十四局集团大盾构工程有限公司 | A kind of anti-water dispersion pulp liquid and preparation method thereof for shield synchronization slip casting |
| CN110437812A (en) * | 2019-08-28 | 2019-11-12 | 中铁隧道局集团有限公司 | A kind of shield warehouse entry slurries with pressure and preparation method thereof |
| CN111022064B (en) * | 2020-01-01 | 2021-04-09 | 中铁四局集团有限公司 | Mud sinking prevention and grouting slurry for shield construction |
| CN112194420B (en) * | 2020-08-27 | 2022-11-15 | 中铁十局集团有限公司 | Water-dilution-resistant synchronous grouting liquid for water-rich geological shield construction and preparation method thereof |
| CN112142403A (en) * | 2020-09-16 | 2020-12-29 | 贵州正和天筑科技有限公司 | Soil-stabilizing grouting material and preparation method thereof |
| CN112759320B (en) * | 2020-12-21 | 2023-05-05 | 中国石油大学(华东) | High-fluidity low-density grouting material for offshore wind power suction pile foundation |
| CN116003044A (en) * | 2022-05-11 | 2023-04-25 | 北京漏邦房屋修缮工程有限公司 | High-strength impervious grouting material and preparation method and use method thereof |
| CN116217137A (en) * | 2022-12-21 | 2023-06-06 | 中铁隧道局集团有限公司 | Low-carbon resource utilization type shield inert synchronous grouting material and preparation method thereof |
| CN116217176A (en) * | 2023-03-15 | 2023-06-06 | 中铁隧道局集团有限公司 | Synchronous grouting material capable of preventing pipe piece from floating upwards and application thereof |
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| JPH02102162A (en) * | 1988-10-12 | 1990-04-13 | Mitsubishi Mining & Cement Co Ltd | Grouting material |
| CN103951335B (en) * | 2013-12-13 | 2016-05-11 | 中铁十四局集团有限公司 | Major diameter slurry shield discarded slurry recycles synchronous slip casting |
| CN106946522B (en) * | 2017-03-08 | 2020-04-07 | 北京艺高世纪科技股份有限公司 | Shield synchronous grouting construction material |
| CN106904888B (en) * | 2017-03-13 | 2019-07-19 | 河北三楷展创建材有限公司 | A kind of high-moisture-retention shield-tunneling construction premixing synchronous grouting material |
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