CN115819062A - Synchronous grouting dry material, preparation method thereof and large-diameter shield slurry for water-rich sand layer - Google Patents
Synchronous grouting dry material, preparation method thereof and large-diameter shield slurry for water-rich sand layer Download PDFInfo
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- CN115819062A CN115819062A CN202211534205.9A CN202211534205A CN115819062A CN 115819062 A CN115819062 A CN 115819062A CN 202211534205 A CN202211534205 A CN 202211534205A CN 115819062 A CN115819062 A CN 115819062A
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- 239000000463 material Substances 0.000 title claims abstract description 91
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 59
- 239000004576 sand Substances 0.000 title claims abstract description 32
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 28
- 239000002002 slurry Substances 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000000654 additive Substances 0.000 claims abstract description 107
- 230000000996 additive effect Effects 0.000 claims abstract description 99
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 57
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000002585 base Substances 0.000 claims abstract description 29
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 29
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 claims abstract description 19
- 239000004354 Hydroxyethyl cellulose Substances 0.000 claims abstract description 19
- 239000004568 cement Substances 0.000 claims abstract description 19
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 claims abstract description 19
- 229910052783 alkali metal Inorganic materials 0.000 claims abstract description 16
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 13
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 13
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 13
- -1 alkali metal salt Chemical class 0.000 claims abstract description 12
- 239000010881 fly ash Substances 0.000 claims description 42
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 33
- 239000011398 Portland cement Substances 0.000 claims description 20
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 18
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 18
- 239000000440 bentonite Substances 0.000 claims description 18
- 229910000278 bentonite Inorganic materials 0.000 claims description 18
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 18
- 239000010440 gypsum Substances 0.000 claims description 18
- 229910052602 gypsum Inorganic materials 0.000 claims description 18
- 239000004571 lime Substances 0.000 claims description 18
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 16
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 13
- 239000011734 sodium Substances 0.000 claims description 13
- 229910052708 sodium Inorganic materials 0.000 claims description 13
- 239000002253 acid Substances 0.000 claims description 10
- 229920001732 Lignosulfonate Polymers 0.000 claims description 9
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 9
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 8
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 8
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 8
- 235000011152 sodium sulphate Nutrition 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 7
- 150000001340 alkali metals Chemical class 0.000 claims description 5
- 229910000288 alkali metal carbonate Inorganic materials 0.000 claims description 3
- 150000008041 alkali metal carbonates Chemical class 0.000 claims description 3
- 229910052936 alkali metal sulfate Inorganic materials 0.000 claims description 3
- 229920005646 polycarboxylate Polymers 0.000 claims description 3
- 229920000417 polynaphthalene Polymers 0.000 claims description 3
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 3
- 239000008030 superplasticizer Substances 0.000 claims description 2
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims 3
- 230000000694 effects Effects 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 12
- 230000007774 longterm Effects 0.000 abstract description 5
- 238000003756 stirring Methods 0.000 description 25
- 239000011575 calcium Substances 0.000 description 16
- 229910052791 calcium Inorganic materials 0.000 description 16
- 239000004570 mortar (masonry) Substances 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 12
- 239000000203 mixture Substances 0.000 description 9
- 238000005303 weighing Methods 0.000 description 7
- 239000012856 weighed raw material Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 description 3
- 239000001863 hydroxypropyl cellulose Substances 0.000 description 3
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 230000000740 bleeding effect Effects 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000003908 quality control method Methods 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910000281 calcium bentonite Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical group [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005325 percolation Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 229910001948 sodium oxide Inorganic materials 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Classifications
-
- 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
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a synchronous grouting dry material and a preparation method thereof, and a large-diameter shield slurry of a water-rich sand layer, wherein the dry material comprises the following components in parts by weight: 90-105 parts of base material, 0.3-1.5 parts of first additive, 0.6-1.5 parts of second additive and 1-2 parts of third additive, wherein the first additive comprises polyethylene glycol and silica sand, the second additive comprises alkali metal salt and strong base, and the third additive comprises hydroxyethyl cellulose ether, water reducer and sulphoaluminate cement clinker. By selecting and optimizing the additives, the matching proportion of the additives and the quality of the basic material are controlled, and the slurry mixed with water has the effects of high filling rate, good fluidity, controllable setting time, considerable early strength and good long-term stability. Furthermore, the optimized synchronous grouting dry material is applied to a large-diameter shield synchronous grouting process of a water-rich sand layer, and the application effect of preventing settlement overrun can be effectively improved.
Description
Technical Field
The invention relates to the field of building materials, in particular to a synchronous grouting dry material, a preparation method thereof and a large-diameter shield slurry for a water-rich sand layer.
Background
Under the influence of fast-paced society, subways become the mainstream mode of resident trip, and the problems of ground settlement overrun and the like in shield construction can exist. The synchronous grouting process is a key process in the construction process of the shield tunnel, and plays a key role in stabilizing the ring-forming tunnel structure, controlling the deformation of the surrounding soil body and the like. The control of the shield construction process is the important part for preventing the settlement from exceeding the limit, the synchronous grouting is the most important link for controlling the settlement exceeding, and the settlement can be completely exceeded through the quality control of raw materials used for the synchronous grouting, the slurry mixing proportion optimization and the construction process control.
The water-rich sand layer has the characteristics of high water quantity, extremely fine pores, partial cohesive soil and the like, and the chemical grouting material has high groutability, but the material is greatly limited in development and application due to high price, complex formula, environment pollution, poor corrosion resistance and poor durability, and most of the chemical grouting materials have certain toxicity to underground water. The common cement material is difficult to inject a coarse sand layer and a medium-fine sand layer with high fine particle content, the percolation effect is obvious, the setting time is long, the dispersibility resistance in water is poor, and the volume of the hardened slurry is shrunk, so that the plugging and the reinforcement of the water-rich sand layer are difficult to realize. Quick setting cement materials such as cement-water glass and other slurries are difficult to effectively permeate and diffuse, and the water erosion resistance and durability of the stone body are poor, and the later strength or the collapse occurs. In addition, the three materials have unsatisfactory application effect in the grouting treatment process of the water-rich sand layer.
Disclosure of Invention
On the basis, in order to ensure that the slurry has high filling rate, good fluidity, controllable setting time, considerable early strength and good long-term stability, a synchronous grouting dry material, a preparation method thereof and a large-diameter shield slurry of a water-rich sand layer are needed.
The invention provides a synchronous grouting dry material which comprises the following components in parts by weight: 90 to 105 portions of basic material, 0.3 to 1.5 portions of first additive, 0.6 to 1.5 portions of second additive and 1 to 2 portions of third additive,
the base material is selected from one or more of portland cement, fly ash, bentonite, desulfurized gypsum and lime, the first additive comprises polyethylene glycol and silica sand, the second additive comprises alkali metal salt and strong base, and the third additive comprises hydroxyethyl cellulose ether, a water reducing agent and sulphoaluminate cement clinker.
In one embodiment, the base material comprises (40-70) to (12-35) to (5-20) to (1-8) to (2-10) by weight of portland cement, fly ash, bentonite, desulfurized gypsum and lime.
In one embodiment, the first additive comprises (86-106) to (1-8) polyethylene glycol and silica sand in a weight ratio.
In one embodiment, the second additive meets one or more of the following characteristics:
(1) The alkali metal salt is selected from one or more of alkali metal carbonate, alkali metal sulfate and alkali metal meta-aluminate;
(2) The strong base is selected from one or more of sodium hydroxide and potassium hydroxide;
(3) The second additive comprises (65-85) by weight of the alkali metal salt and (18-32) by weight of the alkali metal salt and the strong base.
In one embodiment, the second additive comprises sodium hydroxide, sodium carbonate, sodium sulfate and sodium metaaluminate in a weight ratio of (20-30): 19-29): 18-28): 1-8): 23-33.
In one embodiment, the third additive comprises (2-12) to (25-20) to (1-8) of hydroxyethyl cellulose ether, a water reducing agent and sulphoaluminate cement clinker in weight ratio.
In one embodiment, the water reducer is selected from one or more of a sodium polynaphthalene sulfonate water reducer, a lignosulfonate water reducer, and a polycarboxylic acid water reducer.
In one embodiment, the water reducer satisfies one or more of the following characteristics:
(1) The gas content of the polycarboxylate superplasticizer is less than 3.0%;
(2) The viscosity range of the hydroxyethyl cellulose ether is 9.7W-10.5W.
Further, the invention also provides a preparation method of the synchronous grouting dry material, which comprises the following steps:
preparing the components of the dry material according to the above steps and mixing.
Further, the invention also provides large-diameter shield slurry of the water-rich sand layer, which comprises the dry material.
The synchronous grouting dry material has the advantages that the additives are mutually matched through selecting and optimizing the additives, the quality of the basic material is controlled, the matching proportion of the dry materials is optimized, and the slurry mixed with water has the effects of high filling rate, good fluidity, controllable setting time, considerable early strength and good long-term stability. Furthermore, the optimized synchronous grouting dry material is applied to a large-diameter shield process of a water-rich sand layer, so that the application effect of preventing settlement overrun can be effectively improved.
Detailed Description
The present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise. In the description of the present invention, "a plurality" means at least one, e.g., one, two, etc., unless specifically limited otherwise.
All percentages, fractions and ratios are calculated on the total mass of the composition of the invention, unless otherwise indicated. All qualities relating to the listed ingredients are given to the content of active substance, unless otherwise specified, and therefore they do not include solvents or by-products that may be contained in commercially available materials. The term "mass percent content" herein may be represented by the symbol "%".
The use of "including," "comprising," "containing," "having," or other variations thereof herein, is meant to encompass the non-exclusive inclusion, as such terms are not to be construed. The term "comprising" means that other steps and ingredients can be added which do not affect the end result. The term "comprising" also includes the terms "consisting of and" consisting essentially of 82303030A ". The compositions and methods/methods of the present invention comprise, consist of, and consist essentially of the essential elements and limitations described herein, as well as any of the additional or optional ingredients, components, steps, or limitations described herein. The terms "potency", "performance", "effect" and "efficacy" are not distinguished from one another herein.
The words "preferably," "more preferably," and the like, in the present disclosure mean embodiments of the disclosure that may, in some instances, provide certain benefits. However, other embodiments may be preferred, under the same or other circumstances. Furthermore, the recitation of one or more preferred embodiments does not imply that other embodiments are not useful, nor is it intended to exclude other embodiments from the scope of the invention.
When a range of values is disclosed herein, the range is considered to be continuous and includes both the minimum and maximum values of the range, as well as each value between such minimum and maximum values. Further, when a range refers to an integer, each integer between the minimum and maximum values of the range is included. Further, when multiple range-describing features or characteristics are provided, the ranges may be combined. In other words, unless otherwise indicated, all ranges disclosed herein are to be understood to encompass any and all subranges subsumed therein.
The invention provides a synchronous grouting dry material which comprises the following components in parts by weight: 90 to 105 portions of basic material, 0.3 to 1.5 portions of first additive, 0.6 to 1.5 portions of second additive and 1 to 2 portions of third additive,
the first additive comprises polyethylene glycol and silica sand, the second additive comprises alkali metal salt and strong base, and the third additive comprises hydroxyethyl cellulose ether, a water reducing agent and sulphoaluminate cement clinker.
Preferably, the synchronous grouting dry material comprises the following components in parts by weight: 96 to 97.5 portions of basic material, 0.5 to 1.1 portions of first additive, 0.9 to 1.2 portions of second additive and 1.1 to 1.7 portions of third additive.
In one particular example, the base material is selected from one or more of portland cement, fly ash, bentonite, desulfurized gypsum, and lime.
It will be appreciated that the cement is ordinary portland cement.
In one specific example, the base material comprises (40-70): 12-35): 5-20): 1-8): 2-10 weight ratio of portland cement, fly ash, bentonite, desulfurized gypsum and lime.
Preferably, the base material comprises (41.5-68) by weight, (15-32) by weight, (6-15) by weight, (3.5-5) by weight, (4.5-6) portland cement, fly ash, bentonite, desulfurized gypsum and lime.
Further, the fly ash may be, but is not limited to, one or more selected from high calcium fly ash and low calcium fly ash.
Specifically, the fly ash comprises 50-100 parts of high-calcium fly ash and 0-50 parts of low-calcium fly ash.
Preferably, the fly ash comprises high-calcium fly ash and low-calcium fly ash in a mass ratio of 7.
In one specific example, the first additive comprises (86-106) to (1-8) by weight of polyethylene glycol and silica sand.
In a specific example, the alkali metal salt is selected from one or more of alkali metal carbonate, alkali metal sulfate, and alkali metal meta-aluminate.
It will be appreciated that the alkali metal is selected from one or more of potassium, sodium and lithium, preferably the alkali metal is sodium.
In a specific example, the strong base is selected from one or more of sodium hydroxide and potassium hydroxide.
Preferably, the strong base is strong sodium oxide.
In one specific example, the second additive comprises (65-85) by weight of alkali metal salt (18-32) and strong base.
In one specific example, the second additive comprises sodium hydroxide, sodium carbonate, sodium sulfate and sodium metaaluminate in the weight ratio of (20-30): 19-29): 18-28): 1-8): 23-33.
In one specific example, the third additive comprises (2-12) to (25-20) to (1-8) by weight of hydroxyethyl cellulose ether, a water reducer, and a sulphoaluminate cement clinker.
In a particular example, the water reducer is selected from one or more of a sodium polynaphthalene sulfonate water reducer, a lignosulfonate water reducer, and a polycarboxylic acid water reducer.
In a specific example, the gas content of the polycarboxylate water reducer is less than 3.0%.
In one particular example, the hydroxyethyl cellulose ether has a viscosity in the range of 9.7W to 10.5W. Specifically, the viscosity of the above hydroxyethyl cellulose ether may be, but is not limited to, 9.7W, 9.9W, 10.1W, 10.3W, or 10.5W.
Further, the invention also provides a preparation method of the synchronous grouting dry material, which comprises the following steps:
preparing the components of the dry material according to the above steps, and mixing the components.
Specifically, the method comprises the following steps:
respectively weighing the base materials according to the weight ratio of the mixture ratio, pouring the weighed base materials into a mortar mixer, slowly stirring for 10-30 s, then adding the weighed first additive, second additive and third additive, and slowly stirring for 10-30 s until the mixture is uniformly mixed;
2) The mortar mixer is automatically adjusted, slowly mixed for 40-80 s, quickly mixed for 10-50 s, kept stand for 60-150 s, and finally quickly mixed for 40-80 s.
Specifically, the stirring program in the stirrer comprises revolution stirring and rotation stirring, and the stirring speed can be limited according to requirements, wherein the rotating speed range of rapid stirring in revolution stirring is 115 r/min-135 r/min, the rotating speed range of slow stirring in revolution stirring is 57 r/min-67 r/min, the rotating speed range of rapid stirring in rotation stirring is 275 r/min-295 r/min, and the rotating speed range of slow stirring in rotation stirring is 135 r/min-145 r/min.
The synchronous grouting dry material has the effects of mutual matching of additives, quality control of basic materials, optimization of matching proportion of dry materials, high filling rate of slurry mixed with water, good fluidity, controllable setting time, considerable early strength and good long-term stability by selecting and optimizing the additives. Furthermore, the optimized synchronous grouting dry material is applied to a large-diameter shield process of a water-rich sand layer, so that the application effect of preventing settlement overrun can be effectively improved.
Further, the invention also provides large-diameter shield slurry of the water-rich sand layer, which comprises the dry material.
It is to be understood that the large diameter in the above-described large diameter shield specifically means larger than 15m.
The following specific examples are provided to further illustrate the simultaneous grouting dry material and the preparation method thereof in detail. The raw materials related to the following embodiments can be obtained from commercial sources unless otherwise specified, the cement is P.O 42.5 fresh conch cement, the fly ash is F class II Dongguan Longyuan paper mill, the bentonite is calcium bentonite, the desulfurized gypsum is analytically pure calcium sulfate dihydrate, the lime is hydrated lime, the polycarboxylic acid water reducing agent is purchased from Xingpeng chemical building materials Co., ltd, suzhou city, the water reduction rate is not less than 25%, and the hydroxyethyl cellulose ether is purchased from ChongqingpengKai fine chemical industry Co., ltd.
Example 1
The embodiment provides a dry material, which comprises the following components in parts by weight: 96 parts of base material, 1.1 parts of first additive, 1.2 parts of second additive and 1.7 parts of third additive,
wherein the basic material comprises 50 parts of portland cement, 22 parts of fly ash, 13 parts of bentonite, 5 parts of desulfurized gypsum and 6 parts of lime, and the ratio of the high-calcium fly ash to the low-calcium fly ash in the fly ash is 7;
the first additive comprises polyethylene glycol and silica sand with the mass ratio of 96;
the second additive comprises 25 mass ratios of sodium hydroxide, sodium carbonate, sodium sulfate and sodium metaaluminate to the components of;
the third additive comprises lignosulfonate, hydroxyethyl cellulose ether, a polycarboxylic acid water reducing agent and sulphoaluminate cement clinker in a mass ratio of 17.
The preparation method of the dry material comprises the following steps:
1) Respectively weighing 50 parts of portland cement, 22 parts of fly ash, 13 parts of bentonite, 5 parts of desulfurized gypsum and 6 parts of lime according to the weight ratio, pouring the weighed raw materials into a mortar stirrer, slowly stirring for 20s, then adding the weighed first additive, second additive and third additive, and slowly stirring for 20s until the mixture is uniform;
2) The mortar mixer is automatically adjusted, slowly stirred for 60s, quickly stirred for 30s, kept stand for 90s and finally quickly stirred for 60s.
Example 2
The embodiment provides a dry material, which comprises the following components in parts by weight: 97 parts of base material, 0.6 part of first additive, 0.9 part of second additive and 1.5 parts of third additive,
wherein, the basic material comprises 41.5 parts of Portland cement, 32 parts of fly ash, 15 parts of bentonite, 4 parts of desulfurized gypsum and 4.5 parts of lime, and the proportion of the high-calcium fly ash and the low-calcium fly ash in the fly ash is 7;
the first additive comprises polyethylene glycol and silica sand with the mass ratio of 96;
the second additive comprises 25 mass ratios of sodium hydroxide, sodium carbonate, sodium sulfate and sodium metaaluminate to the components of;
the third additive comprises lignosulfonate, hydroxyethyl cellulose ether, a polycarboxylic acid water reducing agent and sulphoaluminate cement clinker in a mass ratio of 17.
The preparation method of the dry material comprises the following steps:
1) Respectively weighing 41.5 parts of portland cement, 32 parts of fly ash, 15 parts of bentonite, 4 parts of desulfurized gypsum and 4.5 parts of lime according to the weight ratio, pouring the weighed raw materials into a mortar stirrer, slowly stirring for 20s, then adding the weighed first additive, second additive and third additive, and slowly stirring for 20s until the mixture is uniform;
2) The mortar mixer is automatically adjusted, slowly stirred for 60s, quickly stirred for 30s, kept stand for 90s and finally quickly stirred for 60s.
Example 3
The embodiment provides a dry material, which comprises the following components in parts by weight: 97.5 parts of base material, 0.5 part of first additive, 0.9 part of second additive and 1.1 part of third additive,
wherein, the basic material comprises 68 parts of Portland cement, 15 parts of fly ash, 6 parts of bentonite, 3.5 parts of desulfurized gypsum and 5 parts of lime, and the proportion of the high-calcium fly ash to the low-calcium fly ash in the fly ash is 7;
the first additive comprises polyethylene glycol and silica sand with the mass ratio of 96;
the second additive comprises 25 mass ratios of sodium hydroxide, sodium carbonate, sodium sulfate and sodium metaaluminate to the components of;
the third additive comprises lignosulfonate, hydroxyethyl cellulose ether, a polycarboxylic acid water reducing agent and sulphoaluminate cement clinker in a mass ratio of 17.
The preparation method of the dry material comprises the following steps:
1) Respectively weighing 68 parts of portland cement, 15 parts of fly ash, 6 parts of bentonite, 3.5 parts of desulfurized gypsum and 5 parts of lime according to the weight ratio, pouring the weighed raw materials into a mortar stirrer, slowly stirring for 20s, then adding the weighed first additive, second additive and third additive, and slowly stirring for 20s until the mixture is uniform;
2) The mortar mixer is adjusted to be automatic, slowly stirred for 60s, quickly stirred for 30s, kept stand for 90s and finally quickly stirred for 60s.
Comparative example 1
This comparative example differs from example 1 in that no second additive was added,
the comparative example provides a dry material comprising the following components in parts by weight: 96 parts of base material, 1.1 parts of first additive and 1.7 parts of third additive,
wherein the basic material comprises 50 parts of portland cement, 22 parts of fly ash, 13 parts of bentonite, 5 parts of desulfurized gypsum and 6 parts of lime, and the ratio of the high-calcium fly ash to the low-calcium fly ash in the fly ash is 7;
the first additive comprises polyethylene glycol and silica sand with the mass ratio of 96;
the third additive comprises lignosulfonate, hydroxyethyl cellulose ether, a polycarboxylic acid water reducing agent and sulphoaluminate cement clinker in a mass ratio of 17.
The preparation method of the dry material comprises the following steps:
1) Respectively weighing 50 parts of portland cement, 225 parts of fly ash, 13 parts of bentonite, 5 parts of desulfurized gypsum and 6 parts of lime according to the weight ratio, pouring the weighed raw materials into a mortar stirrer, slowly stirring for 20s, then adding the weighed first additive and the weighed third additive, and slowly stirring for 20s until the mixture is uniformly mixed;
2) The mortar mixer is automatically adjusted, slowly stirred for 60s, quickly stirred for 30s, kept stand for 90s and finally quickly stirred for 60s.
Comparative example 2
This comparative example differs from example 1 in that the hydroxyethyl cellulose ether in the third additive is replaced by hydroxypropyl cellulose ether and provides a dry charge comprising the following components in parts by weight: 96 parts of base material, 1.1 parts of first additive, 1.2 parts of second additive and 1.7 parts of third additive,
the base material comprises 50 parts of portland cement, 22 parts of fly ash, 13 parts of bentonite, 5 parts of desulfurized gypsum and 6 parts of lime, wherein the proportion of high-calcium fly ash to low-calcium fly ash in the fly ash is 7;
the first additive comprises polyethylene glycol and silica sand with the mass ratio of 96;
the second additive comprises 25 mass ratios of sodium hydroxide, sodium carbonate, sodium sulfate and sodium metaaluminate to the components of;
the third additive comprises lignosulfonate, hydroxypropyl cellulose ether, a polycarboxylic acid water reducing agent and sulphoaluminate cement clinker in a mass ratio of 17.
The preparation method of the dry material comprises the following steps:
1) Respectively weighing 50 parts of portland cement, 22 parts of fly ash, 13 parts of bentonite, 5 parts of desulfurized gypsum and 6 parts of lime according to the weight ratio, pouring the weighed raw materials into a mortar stirrer, slowly stirring for 20s, then adding the weighed first additive, second additive and third additive, and slowly stirring for 20s until the mixture is uniform;
2) The mortar mixer is automatically adjusted, slowly stirred for 60s, quickly stirred for 30s, kept stand for 90s and finally quickly stirred for 60s.
Comparative example 3
The comparative example differs from example 1 in that the base material is added only to portland cement material, and the comparative example provides a dry material comprising the following components in parts by weight: 96 parts of Portland cement, 1.1 parts of first additive, 1.2 parts of second additive and 1.7 parts of third additive,
the first additive comprises polyethylene glycol and silica sand with the mass ratio of 96;
the second additive comprises 25 mass ratio of sodium hydroxide, sodium carbonate, sodium sulfate and sodium metaaluminate;
the third additive comprises lignosulfonate, hydroxyethyl cellulose ether, a polycarboxylic acid water reducing agent and sulphoaluminate cement clinker in a mass ratio of 17.
The preparation method of the dry material comprises the following steps:
1) Respectively weighing 90 parts of cement according to the weight ratio, pouring the weighed raw materials into a mortar mixer, slowly stirring for 20s, then adding the weighed first additive, second additive and third additive, and slowly stirring for 20s until the materials are uniformly mixed;
2) The mortar mixer is adjusted to be automatic, slowly stirred for 60s, quickly stirred for 30s, kept stand for 90s and finally quickly stirred for 60s.
The slurry prepared by mixing the dry grouting material prepared in the above examples and comparative examples with water was tested, and the test results are shown in table 1 below, wherein the mass ratio of the dry grouting material to the water is 1.
TABLE 1 Properties of slurries prepared by mixing dry grouting materials of examples and comparative examples with water
It can be further seen from the above table that, while the consolidation rate of the final slurry is reduced by adding one additive in comparative example 1, the segregation phenomenon occurs, and the setting time and the bleeding rate are greatly increased, the compounding effect of the additive raw material prepared by adding hydroxyethyl cellulose instead of hydroxypropyl cellulose in comparative example 2 is obviously reduced, not only the consolidation rate is reduced, but also the segregation phenomenon occurs, the setting time and the bleeding rate are greatly increased, and the land-water strength ratio is also obviously reduced. Further, the synchronous grouting dry material provided by the invention has the effects of high filling rate, good fluidity, controllable setting time, considerable early strength and good long-term stability of the slurry prepared by mixing the synchronous grouting dry material with water by selecting and optimizing the additives to ensure that the additives are matched with each other, controlling the quality of the base material and optimizing the matching proportion of the slurry. Furthermore, the optimized dry material avoids the situation that the requirements of the traditional slurry on the grouting material such as water quantity of a water-rich sand layer, soil content, fineness of the sand layer, particle size distribution of the material, durability, environmental protection, engineering economic cost and the like are not fully and comprehensively considered, can be applied to a large-diameter shield synchronous grouting process of the water-rich sand layer, and can effectively improve the application effect of preventing settlement overrun.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, so as to understand the technical solutions of the present invention specifically and in detail, but not to be understood as the limitation of the protection scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. It should be understood that the technical solutions provided by the present invention and obtained by logical analysis, reasoning or limited experiments by those skilled in the art are all within the scope of the appended claims. Therefore, the protection scope of the patent of the invention is subject to the content of the appended claims, and the description can be used for explaining the content of the claims.
Claims (10)
1. The synchronous grouting dry material is characterized by comprising the following components in parts by weight: 90 to 105 portions of basic material, 0.3 to 1.5 portions of first additive, 0.6 to 1.5 portions of second additive and 1 to 2 portions of third additive,
the base material is selected from one or more of portland cement, fly ash, bentonite, desulfurized gypsum and lime, the first additive comprises polyethylene glycol and silica sand, the second additive comprises alkali metal salt and strong base, and the third additive comprises hydroxyethyl cellulose ether, a water reducing agent and sulphoaluminate cement clinker.
2. The dry synchronous grouting material as claimed in claim 1, wherein the base material comprises (40-70): 12-35): 5-20): 1-8: (2-10) portland cement, fly ash, bentonite, desulfurized gypsum and lime in weight ratio.
3. The simultaneous grouting dry material according to claim 1, wherein the first additive comprises (86-106) to (1-8) of polyethylene glycol and silica sand by weight ratio.
4. The simultaneous grouting dry material of claim 1, wherein the second additive meets one or more of the following characteristics:
(1) The alkali metal salt is selected from one or more of alkali metal carbonate, alkali metal sulfate and alkali metal meta-aluminate;
(2) The strong base is selected from one or more of sodium hydroxide and potassium hydroxide;
(3) The second additive comprises (65-85) of the alkali metal salt and (18-32) of the strong base in weight ratio.
5. The dry synchronous grouting material as claimed in claim 1, wherein the second additive comprises sodium hydroxide, sodium carbonate, sodium sulfate and sodium metaaluminate in the weight ratio of (20-30), (19-29), (18-28), (1-8) and (23-33).
6. The dry synchronous grouting material as claimed in claim 1, wherein the third additive comprises (2-12) to (25-20) to (1-8) by weight of hydroxyethyl cellulose ether, a water reducing agent and sulphoaluminate cement clinker.
7. The simultaneous grouting dry material as claimed in claim 1, wherein the water reducing agent is selected from one or more of sodium polynaphthalene formaldehyde sulfonate water reducing agent, lignosulfonate water reducing agent and polycarboxylic acid water reducing agent.
8. The synchronous grouting dry material of claim 1 or 7, wherein the water reducing agent meets one or more of the following characteristics:
(1) The gas content of the polycarboxylate superplasticizer is less than 3.0%;
(2) The viscosity range of the hydroxyethyl cellulose ether is 9.7W-10.5W.
9. The preparation method of the synchronous grouting dry material is characterized by comprising the following steps:
preparing and mixing the components of the dry material according to any one of claims 1 to 8.
10. A water-rich sand layer large diameter shield slurry, characterized by comprising the dry material according to any one of claims 1 to 8.
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