CN114854373B - Antifreezing shield muck paste slurry and preparation method thereof - Google Patents
Antifreezing shield muck paste slurry and preparation method thereof Download PDFInfo
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- CN114854373B CN114854373B CN202210621233.8A CN202210621233A CN114854373B CN 114854373 B CN114854373 B CN 114854373B CN 202210621233 A CN202210621233 A CN 202210621233A CN 114854373 B CN114854373 B CN 114854373B
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- muck
- antifreeze
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/18—Materials not provided for elsewhere for application to surfaces to minimize adherence of ice, mist or water thereto; Thawing or antifreeze materials for application to surfaces
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/18—Materials not provided for elsewhere for application to surfaces to minimize adherence of ice, mist or water thereto; Thawing or antifreeze materials for application to surfaces
- C09K3/185—Thawing materials
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention discloses an antifreezing shield muck slurry which is prepared from a muck slurry antifreezing solution and shield muck, wherein: the muck paste antifreeze fluid is prepared from clear water, sodium chloride, potassium chloride, sodium hydroxide, antifreeze protein and an antifreeze additive; the addition amount of the sodium chloride is 6 to 10 percent of the mass of the clear water; the addition amount of the potassium chloride is 1 to 3 percent of the mass of the clear water; the addition amount of the sodium hydroxide is 0.1 to 0.5 percent of the mass of the clear water; the addition amount of the antifreeze protein is 0.1 to 0.2 percent of the mass of the clear water; the addition amount of the anti-freezing additive is 2 to 6 percent of the mass of the clear water; the addition amount of the muck paste antifreeze fluid is 20 to 30 percent of the mass of the shield muck. According to the invention, additives such as sodium chloride and the like are added in a compound manner while a small amount of antifreeze protein is added, so that the freezing point of the muck slurry is effectively reduced, the muck slurry still has good fluidity in a low-temperature environment, and the normal development of shield construction is ensured.
Description
Technical Field
The invention belongs to the field of shield construction, and relates to an antifreezing shield muck paste slurry and a preparation method thereof.
Background
With the continuous expansion of the underground engineering field in China, urban subways meet the peak of construction, the shield method in subway construction is a relatively wide application mode, and a large amount of muck is generated in the construction process no matter an earth pressure balance shield or a slurry shield. However, in winter construction in alpine regions, the phenomenon that the temperature is too low so that the slag soil is frozen exists, and therefore the transmission of the slag soil and the further development of the shield are influenced. Therefore, how to reduce the freezing point of the slag and keep the fluidity at low temperature becomes a problem to be solved urgently. At present, the antifreezing agent mainly comprises three categories of chloride salt, formate and organic alcohol, wherein the chloride salt is the main antifreezing agent, and has the advantages of low price, convenient use and good antifreezing effect. The addition of chloride salt to the muck paste can maintain the system with better rheological properties at low temperature, but when the concentration of chloride salt is too high, small-particle clay is agglomerated into large particles, and the fluidity is reduced. In order to better shield construction and increase the fluidity of the low-temperature slag-soil slurry, a proper chemical additive needs to be selected, so that the adverse effect of the chloride on the slurry system is reduced, and the slurry performance is improved.
Disclosure of Invention
The invention provides an antifreezing shield muck slurry and a preparation method thereof, aiming at solving the problems that the existing muck slurry is easy to freeze at low temperature and obstructs shield construction.
The purpose of the invention is realized by the following technical scheme:
an anti-freezing shield residual soil paste slurry is prepared from an anti-freezing solution of the residual soil paste slurry and shield residual soil, wherein:
the muck paste antifreeze fluid is prepared from clear water, sodium chloride, potassium chloride, sodium hydroxide, antifreeze protein and an antifreeze additive;
the addition amount of the sodium chloride is 6 to 10 percent of the mass of the clear water;
the addition amount of the potassium chloride is 1 to 3 percent of the mass of the clear water;
the addition amount of the sodium hydroxide is 0.1 to 0.5 percent of the mass of the clear water;
the addition amount of the antifreeze protein is 0.1 to 0.2 percent of the mass of the clear water;
the addition amount of the anti-freezing additive is 2-6% of the mass of the clear water;
the addition amount of the muck paste antifreeze fluid is 20 to 30 percent of the mass of the shield muck.
A preparation method of the anti-freezing shield muck slurry comprises the following steps:
step 1: weighing a certain amount of clear water, adding sodium chloride, potassium chloride and sodium hydroxide into the clear water, and fully stirring to completely dissolve the sodium chloride, the potassium chloride and the sodium hydroxide;
step 2: adding the antifreeze protein and the antifreeze additive while stirring, and uniformly stirring to obtain the muck paste antifreeze fluid;
and step 3: and adding the muck paste antifreezing solution into the shield muck, and uniformly stirring to obtain the antifreezing shield muck paste.
In the invention, the sodium chloride is an analytically pure sodium chloride reagent produced by national medicine group chemical reagent limited company. Sodium chloride can reduce intermolecular interactions and reduce water activity, thereby lowering the freezing point of aqueous solutions. The freezing point of the slurry decreases as the sodium chloride content increases, but when the chloride concentration is too high, small clay particles agglomerate into larger particles, reducing fluidity. Therefore, the amount of sodium chloride to be added needs to be appropriately controlled.
In the invention, the potassium chloride is an analytically pure potassium chloride reagent produced by chemical reagent Limited of national drug group.
In the invention, the sodium hydroxide is an analytically pure sodium hydroxide reagent produced by chemical reagent of national drug group, inc. The pH value of the slurry can be adjusted to 6-8 by a proper amount of sodium hydroxide.
In the invention, the antifreeze protein is plant antifreeze protein (wheat bran), which can promote impurity molecules to be adsorbed on the surface of the ice growth path, so that the curvature of the ice surface is increased, and the surface area of the edge is also increased. Due to the influence of surface tension, increasing the surface area changes the equilibrium state of the system, thereby lowering the freezing point. And the additive has large yield and low cost, and is a mud antifreezing additive with great application value.
In the invention, the anti-freezing additive is a mixture of calcium magnesium acetate and sulfomethylated tannin, and the mass ratio of the anti-freezing additive is 3. The calcium-magnesium acetate has better anti-freezing effect and is a main additive component of part of snow remover; the sulfomethylated tannin has good dilution dispersibility, and can improve the fluidity of the muck paste slurry.
Compared with the prior art, the invention has the following advantages:
according to the invention, additives such as sodium chloride and the like are added in a composite manner while a small amount of wheat bran plant antifreeze protein is added, so that the freezing point of the muck paste slurry is effectively reduced, the muck paste slurry still has good fluidity in a low-temperature environment, and the normal development of shield construction is ensured. And because the addition amount is less, the price is low, and the application prospect is wide.
Detailed Description
The technical solutions of the present invention are further described below with reference to the following examples, but the present invention is not limited thereto, and any 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.
Example 1
The embodiment provides a preparation method of anti-freezing shield muck slurry, which comprises the following steps:
step 1: weighing 10kg of clear water, adding 0.6kg of sodium chloride, 0.2kg of potassium chloride and 0.02kg of sodium hydroxide into the clear water, and fully stirring to completely dissolve the sodium chloride.
Step 2: 0.01kg of wheat bran, 0.15kg of calcium-magnesium acetate and 0.05kg of sulfomethylated tannin are added while stirring, and the mixture is uniformly stirred to obtain the slag-soil paste slurry antifreezing solution.
And step 3: and adding 25% of the muck slurry antifreezing solution into the shield muck according to the mass percentage, and uniformly stirring to obtain the antifreezing shield muck slurry.
The anti-freezing shield muck slurry prepared by the embodiment still has better fluidity at the temperature of more than-5.6 ℃.
Example 2
The embodiment provides a preparation method of an antifreezing shield muck slurry, which is carried out according to the following steps:
step 1: weighing 10kg of clear water, adding 1kg of sodium chloride, 0.2kg of potassium chloride and 0.02kg of sodium hydroxide into the clear water, and fully stirring to completely dissolve the sodium chloride and the potassium chloride.
And 2, step: 0.02kg of wheat bran, 0.3kg of calcium-magnesium acetate and 0.1kg of sulfomethylated tannin are added while stirring, and the mixture is uniformly stirred to obtain the muck paste antifreezing solution.
And 3, adding 25% of the slag soil paste slurry antifreezing solution into the shield slag soil according to the mass percentage, and uniformly stirring to obtain the antifreezing shield slag soil paste slurry.
The anti-freezing shield muck paste prepared by the embodiment still has good fluidity at the temperature of more than-12.3 ℃.
Claims (3)
1. The utility model provides an anti-freezing shield constructs dregs plaster thick liquid which characterized in that anti-freezing shield constructs dregs plaster thick liquid and constructs the dregs by dregs plaster thick liquid antifreeze and make, wherein:
the muck paste antifreeze fluid is prepared from clear water, sodium chloride, potassium chloride, sodium hydroxide, antifreeze protein and an antifreeze additive;
the addition amount of the sodium chloride is 6 to 10 percent of the mass of the clear water;
the addition amount of the potassium chloride is 1 to 3 percent of the mass of the clear water;
the addition amount of the sodium hydroxide is 0.1 to 0.5 percent of the mass of the clear water;
the addition amount of the antifreeze protein is 0.1 to 0.2 percent of the mass of the clear water;
the addition amount of the anti-freezing additive is 2 to 6 percent of the mass of the clear water;
the addition amount of the muck paste antifreeze fluid is 20 to 30 percent of the mass of the shield muck;
the antifreeze protein is wheat bran;
the anti-freezing additive is a mixture of calcium-magnesium acetate and sulfomethylated tannin.
2. The antifreeze shield muck slurry according to claim 1, wherein the mass ratio of the calcium-magnesium acetate to the sulfomethylated tannin is 3.
3. A method for preparing the antifreeze shield muck slurry of any one of claims 1 to 2, which is characterized by comprising the following steps:
step 1: weighing a certain amount of clear water, adding sodium chloride, potassium chloride and sodium hydroxide into the clear water, and fully stirring to completely dissolve the clear water;
step 2: adding the antifreeze protein and the antifreeze additive while stirring, and uniformly stirring to obtain the muck paste antifreeze fluid;
and 3, step 3: and adding the muck paste antifreeze solution into the shield muck, and uniformly stirring to obtain the antifreeze shield muck paste.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210621233.8A CN114854373B (en) | 2022-06-02 | 2022-06-02 | Antifreezing shield muck paste slurry and preparation method thereof |
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| CN202210621233.8A CN114854373B (en) | 2022-06-02 | 2022-06-02 | Antifreezing shield muck paste slurry and preparation method thereof |
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| CN114854373A CN114854373A (en) | 2022-08-05 |
| CN114854373B true CN114854373B (en) | 2023-04-18 |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2543712A4 (en) * | 2010-03-04 | 2014-01-22 | Univ Hokkaido Nat Univ Corp | Supercooling promoting agent |
| CN103102886A (en) * | 2013-01-11 | 2013-05-15 | 北京城建集团有限责任公司 | Muck modifier guaranteeing smooth tunneling of shield tunneling machine |
| CN103755242B (en) * | 2013-12-19 | 2015-12-30 | 柳州正菱集团有限公司 | A kind of antifreezing cement |
| CN107746704A (en) * | 2017-10-27 | 2018-03-02 | 辽宁好立环境治理有限公司 | Environment-friendly novel boiler and freezing prevention tubing agent |
| CN108863146B (en) * | 2018-07-25 | 2021-03-30 | 长安大学 | Composite liquid antifreezing pumping aid and preparation method thereof |
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