CN111170685A - Green slurry for water-rich fractured formation slurry shield construction and preparation method thereof - Google Patents
Green slurry for water-rich fractured formation slurry shield construction and preparation method thereof Download PDFInfo
- Publication number
- CN111170685A CN111170685A CN202010068591.1A CN202010068591A CN111170685A CN 111170685 A CN111170685 A CN 111170685A CN 202010068591 A CN202010068591 A CN 202010068591A CN 111170685 A CN111170685 A CN 111170685A
- Authority
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- China
- Prior art keywords
- green
- parts
- slurry
- water
- maltodextrin
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- Granted
Links
- 239000002002 slurry Substances 0.000 title claims abstract description 79
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 238000010276 construction Methods 0.000 title claims abstract description 28
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000000654 additive Substances 0.000 claims abstract description 21
- 230000000996 additive effect Effects 0.000 claims abstract description 21
- 229920002774 Maltodextrin Polymers 0.000 claims abstract description 19
- 239000005913 Maltodextrin Substances 0.000 claims abstract description 19
- 229940035034 maltodextrin Drugs 0.000 claims abstract description 19
- 238000003756 stirring Methods 0.000 claims abstract description 17
- 239000000203 mixture Substances 0.000 claims abstract description 15
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 13
- 239000000440 bentonite Substances 0.000 claims abstract description 13
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000002270 dispersing agent Substances 0.000 claims abstract description 13
- 239000004927 clay Substances 0.000 claims abstract description 11
- 230000005484 gravity Effects 0.000 claims abstract description 11
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical group [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 7
- 229940092782 bentonite Drugs 0.000 claims description 11
- ONCZQWJXONKSMM-UHFFFAOYSA-N dialuminum;disodium;oxygen(2-);silicon(4+);hydrate Chemical group O.[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Na+].[Na+].[Al+3].[Al+3].[Si+4].[Si+4].[Si+4].[Si+4] ONCZQWJXONKSMM-UHFFFAOYSA-N 0.000 claims description 6
- 229940080314 sodium bentonite Drugs 0.000 claims description 6
- 229910000280 sodium bentonite Inorganic materials 0.000 claims description 6
- 235000007164 Oryza sativa Nutrition 0.000 claims description 5
- 240000008042 Zea mays Species 0.000 claims description 5
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims description 5
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims description 5
- 235000005822 corn Nutrition 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 235000009566 rice Nutrition 0.000 claims description 5
- 229920002472 Starch Polymers 0.000 claims description 3
- 241000209140 Triticum Species 0.000 claims description 3
- 235000021307 Triticum Nutrition 0.000 claims description 3
- 239000008107 starch Substances 0.000 claims description 3
- 235000019698 starch Nutrition 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 2
- 230000007062 hydrolysis Effects 0.000 claims description 2
- 238000006460 hydrolysis reaction Methods 0.000 claims description 2
- 238000000746 purification Methods 0.000 claims description 2
- 240000007594 Oryza sativa Species 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000001914 filtration Methods 0.000 abstract description 7
- 229920000881 Modified starch Polymers 0.000 abstract description 5
- 239000004368 Modified starch Substances 0.000 abstract 1
- 235000019426 modified starch Nutrition 0.000 abstract 1
- 239000002699 waste material Substances 0.000 description 6
- 238000009412 basement excavation Methods 0.000 description 5
- 239000002689 soil Substances 0.000 description 5
- 241000209094 Oryza Species 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 229920006184 cellulose methylcellulose Polymers 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 1
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Classifications
-
- 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
- C04B28/001—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 unburned clay
-
- 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
-
- 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
- C04B2201/10—Mortars, concrete or artificial stone characterised by specific physical values for the viscosity
Abstract
The invention provides green slurry for water-rich fractured formation slurry shield construction and a preparation method thereof, wherein the green slurry comprises the following components in parts by weight: 1000 parts of clear water, 130-170 parts of natural clay, 130-155 parts of bentonite, 3-6 parts of a dispersing agent and 40-70 parts of a green additive; wherein the green additive is maltodextrin; the dispersant is anhydrous sodium carbonate. The preparation method comprises the following steps: adding clear water into the natural clay and the bentonite under stirring to obtain a mixture; controlling the specific gravity of the mixture to be 1.11-1.13; and sequentially adding a green additive and a dispersing agent into the mixture under stirring, controlling the viscosity of the Su-type funnel to be 24-26 s and the pH value to be 8-10, and continuously stirring to obtain the modified starch. The obtained green slurry has good performance and low cost, and the parameters of viscosity, specific gravity, filtration loss, pH value and the like can meet the requirements of engineering indexes, thereby having certain popularization value.
Description
Technical Field
The invention relates to the field of shield tunnels, in particular to green slurry for slurry shield construction of a water-rich fractured stratum and a preparation method thereof.
Background
In areas with high permeability, soft silt stratum, loose sand stratum, sand-gravel stratum, cross-river tunnels with high stratum water content and high requirement on ground settlement, the slurry shield has the advantages of safety, quickness, good waterproof quality, stable excavation surface, high excavation precision and the like, and is used as a wide construction technology for tunnel engineering construction. Particularly, for underwater tunnel construction, most of the underwater tunnel construction is carried out by adopting a slurry shield method. The selection of the slurry additive and the slurry proportion are particularly important when the soil body of the excavation surface is pressed by muddy water to permeate into a mud film so as to maintain the stability of the excavation surface for stratums with strong permeability, such as sand pebbles, sandy soil, fault fracture zones and the like. If the matching between the slurry and the excavated soil body is poor, the slurry cannot form a compact mud film on the excavated surface, so that the slurry pressure cannot be effectively converted into effective slurry pressure for maintaining the stability of the excavated surface, and the instability of the excavated surface is caused.
At present, most of slurry used by slurry shields is composed of natural clay, bentonite, water and other compounds such as viscosity increaser CMC, pregelatinized starch and the like, and the outstanding problems are that slurry indexes are difficult to control, the discharge amount of waste slurry is large and the stability is poor. And because the selected CMC is a compound or a polymer, the pregelatinized starch has poor physical and chemical stability and is easy to lose efficacy, so the pregelatinized starch easily pollutes the environment in the construction process, and especially easily pollutes underground drinking water in areas with high water quality requirements and causes harm to human bodies.
In view of the above, the invention provides a low-cost green and environment-friendly additive, and the influence of the green additive on the slurry performance index is analyzed through an indoor test. Finally, a green slurry proportioning device which is environment-friendly, economical, efficient and strong in applicability is provided according to the characteristics of the water-rich broken stratum, and reference is provided for field construction.
Disclosure of Invention
The invention provides green slurry for water-rich broken stratum slurry shield construction and a preparation method thereof, and aims to improve the stability of the slurry, reduce the slurry making cost, reduce the waste slurry amount and environmental pollution, improve the recycling rate of muck, reduce the treatment cost of the waste muck, ensure that the prepared slurry has excellent working performance and good adaptability to corresponding stratums.
In order to achieve the purpose, the invention provides the following technical scheme:
the green slurry for the water-rich fractured formation slurry shield construction comprises the following components in parts by weight:
1000 parts of clear water, 130-170 parts of natural clay, 130-155 parts of bentonite, 3-6 parts of a dispersing agent and 40-70 parts of a green additive; wherein the green additive is maltodextrin; the dispersant is anhydrous sodium carbonate.
Preferably, the bentonite is sodium bentonite.
Preferably, the maltodextrin is prepared from starch by hydrolysis, transformation, purification and drying.
Preferably, the maltodextrin is one or more of rice maltodextrin, wheat maltodextrin and corn maltodextrin.
The maltodextrin is prepared from corn, wheat, rice and the like containing starch, has low price, good stability, high temperature resistance, small fermentability, greenness, no pollution and obvious tackifying effect, effectively reduces the slurry filtration loss, is an ideal green slurry additive, can effectively reduce the slurry preparation and residue soil treatment cost by development and utilization of the maltodextrin, and meets the construction requirement of green environmental protection.
Preferably, the specific gravity of the green slurry is 1.11-1.13, the viscosity of the Su-funnel is 24-26 s, and the pH value of the slurry is 8-10.
Preferably, the green mud has a mud loss of less than 20mL as measured by a model NS-1 mud loss tester.
The invention also provides a preparation method of the green slurry for the water-rich fractured formation slurry shield construction, which comprises the following steps:
(1) adding clear water into the natural clay and the bentonite according to the mass portion under stirring to obtain a mixture; controlling the specific gravity of the mixture to be 1.11-1.13;
(2) and (2) sequentially adding a green additive and a dispersing agent into the mixture obtained in the step (1) according to the weight parts under stirring, controlling the viscosity of the Su-funnel to be 24-26 s and the pH value to be 8-10, and continuously stirring to obtain green slurry for water-rich fractured formation slurry shield construction.
Preferably, the stirring time in the step (2) is 10-20 min.
The scheme of the invention has the following beneficial effects:
(1) compared with the traditional slurry system taking sodium carboxymethyl cellulose as an additive, the green slurry for the slurry shield construction of the water-rich fractured formation uses the novel green additive to replace a chemical additive, so that the amount of waste slurry and environmental pollution can be reduced to the maximum extent, and the discharge amount of polluting waste residue soil is reduced. The muck-slurry mixed liquid carried out in the tunneling process can directly enter a slurry shield circulation system for recycling after being blended, so that the recycling rate of the muck is effectively improved, and the treatment cost of the waste muck is reduced.
(2) Compared with a slurry system taking pregelatinized starch as an additive, the green slurry prepared by the invention has more excellent physical and chemical stability, higher high temperature resistance and smaller fermentability.
(3) The green slurry prepared by the invention has the parameters of viscosity, specific gravity, filtration loss, pH value and the like which can meet the performance index requirements of the related slurry in the actual engineering, and the cost is lower than that of the traditional slurry. The invention is green slurry for slurry shield construction, which is environment-friendly, economical, efficient and strong in applicability.
(4) The green mud provided by the invention has good working performance when being applied to the construction of a water-rich fractured stratum slurry shield, can form a smooth and compact mud film in a short time, well maintains the stability of an excavation surface, and has certain popularization value.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description is given with reference to specific embodiments.
Example 1
The embodiment provides green slurry for water-rich fractured formation slurry shield construction, which comprises the following components in parts by mass:
1000 parts of clear water, 130 parts of natural clay, 130 parts of bentonite, 4 parts of a dispersing agent and 40 parts of a novel green additive. The bentonite is sodium bentonite, the dispersant is anhydrous sodium carbonate, and the novel green additive adopts corn maltodextrin.
The preparation method of the green slurry comprises the following steps:
(1) adding 1000 parts of clear water into 130 parts of natural clay and 130 parts of sodium bentonite by mass under stirring to obtain a mixture; controlling the specific gravity of the mixture to be 1.11-1.13;
(2) and (2) sequentially adding 40 parts by mass of corn maltodextrin and 4 parts by mass of anhydrous sodium carbonate into the mixture obtained in the step (1) under stirring, controlling the viscosity of the Suzhou-type funnel to be 24-26 s and the pH value to be 8-10, and continuously stirring for 10min to obtain the green slurry for water-rich fractured formation slurry shield construction.
The performance indexes of the green mud for the water-rich fractured formation slurry shield prepared by the embodiment are as follows: the specific gravity is 1.11, the viscosity of the Su-type funnel is 24s, the pH value of the slurry is 8, the slurry filtration loss measured by an NS-1 type slurry filtration loss measuring instrument is 20ml, the engineering construction requirements are met, and the trial effect is good.
Example 2
The embodiment provides green slurry for water-rich fractured formation slurry shield construction, which comprises the following components in parts by mass:
1000 parts of clear water, 130 parts of natural clay, 155 parts of bentonite, 3 parts of a dispersing agent and 70 parts of a novel green additive. The bentonite is sodium bentonite, the dispersant is anhydrous sodium carbonate, and the novel green additive adopts rice maltodextrin.
The preparation method of the green slurry comprises the following steps:
(1) adding 1000 parts of clear water into 130 parts of natural clay and 155 parts of sodium bentonite by mass under stirring to obtain a mixture; controlling the specific gravity of the mixture to be 1.11-1.13;
(2) and (2) sequentially adding 70 parts by mass of rice maltodextrin and 3 parts by mass of anhydrous sodium carbonate into the mixture obtained in the step (1) under stirring, controlling the viscosity of the Suzhou-type funnel to be 24-26 s and the pH value to be 8-10, and continuously stirring for 20min to obtain the green slurry for water-rich broken stratum slurry shield construction.
The performance indexes of the green mud for the water-rich fractured formation slurry shield prepared by the embodiment are as follows: the specific gravity is 1.13, the viscosity of the Su-type funnel is 26s, the pH value of the slurry is 10, and the slurry filtration loss measured by an NS-1 type slurry filtration loss measuring instrument is 14ml, so that the method meets the engineering construction requirements and has a good trial effect.
The green slurry for water-rich fractured formation slurry shield construction provided by the invention is described in detail above, and the principle and the implementation of the invention are explained in detail by applying specific examples, and the above embodiments and examples are only to illustrate the technical concept and the features of the invention, and the purpose of the embodiments and examples is to enable those skilled in the art to understand the contents of the invention and to implement the invention accordingly, and the protection scope of the invention is not limited thereby. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (8)
1. The green mud for the water-rich fractured formation slurry shield construction is characterized by comprising the following components in parts by mass:
1000 parts of clear water, 130-170 parts of natural clay, 130-155 parts of bentonite, 3-6 parts of a dispersing agent and 40-70 parts of a green additive; wherein the green additive is maltodextrin; the dispersant is anhydrous sodium carbonate.
2. The green mud of claim 1, wherein the bentonite is sodium bentonite.
3. The green mud of claim 1, wherein said maltodextrin is prepared from starch by hydrolysis, conversion, purification and drying.
4. The green mud of claim 1, wherein the maltodextrin is one or more of rice maltodextrin, wheat maltodextrin, and corn maltodextrin.
5. The green mud of claim 1, wherein the green mud has a specific gravity of 1.11-1.13, a Suzuki funnel viscosity of 24-26 s, and a mud pH of 8-10.
6. The green mud of claim 1, wherein the green mud fluid loss is below 20 mL.
7. The preparation method of the green mud for the water-rich fractured formation slurry shield construction according to any one of claims 1 to 6, characterized by comprising the following steps of:
(1) adding clear water into the natural clay and the bentonite according to the mass portion under stirring to obtain a mixture; controlling the specific gravity of the mixture to be 1.11-1.13;
(2) and (2) sequentially adding a green additive and a dispersing agent into the mixture obtained in the step (1) according to the weight parts under stirring, controlling the viscosity of the Su-funnel to be 24-26 s and the pH value to be 8-10, and continuously stirring to obtain green slurry for water-rich fractured formation slurry shield construction.
8. The method according to claim 7, wherein the stirring in step (2) is continued for 10 to 20 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010068591.1A CN111170685B (en) | 2020-01-21 | 2020-01-21 | Green slurry for water-rich fractured formation slurry shield construction and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010068591.1A CN111170685B (en) | 2020-01-21 | 2020-01-21 | Green slurry for water-rich fractured formation slurry shield construction and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111170685A true CN111170685A (en) | 2020-05-19 |
| CN111170685B CN111170685B (en) | 2020-12-08 |
Family
ID=70654823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010068591.1A Expired - Fee Related CN111170685B (en) | 2020-01-21 | 2020-01-21 | Green slurry for water-rich fractured formation slurry shield construction and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111170685B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040221990A1 (en) * | 2003-05-05 | 2004-11-11 | Heathman James F. | Methods and compositions for compensating for cement hydration volume reduction |
| CN104177008A (en) * | 2014-08-12 | 2014-12-03 | 上海三瑞高分子材料有限公司 | Formula of high-dispersion slurry for slurry shield |
| CN105060796A (en) * | 2015-08-27 | 2015-11-18 | 河海大学 | Slurry for slurry shield sand stratum tunneling and preparation method thereof |
| CN106977153A (en) * | 2017-03-08 | 2017-07-25 | 中交第二航务工程局有限公司 | The shield synchronous grouting serous fluid and its construction method prepared using shield discarded slurry |
| CN108046653A (en) * | 2017-12-21 | 2018-05-18 | 上海三瑞高分子材料股份有限公司 | A kind of shield list liquid synchronous grouting outer-penetrating agent |
| CN108191311A (en) * | 2018-01-12 | 2018-06-22 | 中铁第六勘察设计院集团有限公司 | A kind of bentonite slurry formula of liquid for rich water sand-pebble layer |
-
2020
- 2020-01-21 CN CN202010068591.1A patent/CN111170685B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040221990A1 (en) * | 2003-05-05 | 2004-11-11 | Heathman James F. | Methods and compositions for compensating for cement hydration volume reduction |
| CN104177008A (en) * | 2014-08-12 | 2014-12-03 | 上海三瑞高分子材料有限公司 | Formula of high-dispersion slurry for slurry shield |
| CN105060796A (en) * | 2015-08-27 | 2015-11-18 | 河海大学 | Slurry for slurry shield sand stratum tunneling and preparation method thereof |
| CN106977153A (en) * | 2017-03-08 | 2017-07-25 | 中交第二航务工程局有限公司 | The shield synchronous grouting serous fluid and its construction method prepared using shield discarded slurry |
| CN108046653A (en) * | 2017-12-21 | 2018-05-18 | 上海三瑞高分子材料股份有限公司 | A kind of shield list liquid synchronous grouting outer-penetrating agent |
| CN108191311A (en) * | 2018-01-12 | 2018-06-22 | 中铁第六勘察设计院集团有限公司 | A kind of bentonite slurry formula of liquid for rich water sand-pebble layer |
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| Publication number | Publication date |
|---|---|
| CN111170685B (en) | 2020-12-08 |
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Granted publication date: 20201208 |