CN110044775A - A kind of premixing shield grouting material fluidity test method - Google Patents
A kind of premixing shield grouting material fluidity test method Download PDFInfo
- Publication number
- CN110044775A CN110044775A CN201910088382.0A CN201910088382A CN110044775A CN 110044775 A CN110044775 A CN 110044775A CN 201910088382 A CN201910088382 A CN 201910088382A CN 110044775 A CN110044775 A CN 110044775A
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- CN
- China
- Prior art keywords
- slurry
- premixing
- shield
- grouting material
- test method
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
- G01N11/02—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material
- G01N11/04—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material through a restricted passage, e.g. tube, aperture
- G01N11/06—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material through a restricted passage, e.g. tube, aperture by timing the outflow of a known quantity
-
- 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
- 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
Abstract
The invention discloses a kind of premixing shield grouting material fluidity test methods; including cement, flyash, admixture, bentonite, fine sand, additive and water; wherein; the main ingredient of the admixture is flyash and ground granulated blast furnace slag; the bentonite is sodium bentonite, and the additive is non-ionic celluloses ether, saccharide compound, polycarboxylic acid slump retaining agent, starch ether and magnetic hydrotalcite.The utility model has the advantages that the shield slurry as made from this method, can be divided into single slurry type and dual slurry type, wherein one-pack-type can test whether to meet the requirements from appearance, performance setting time, unity rate and compression strength；Dual liquid type can be by appearance, the performance setting time without sand cement base-material slurry, and performance setting time, unity rate and the compression strength of mixed slurry are judgment criteria, can control the quality of mortar, avoid the occurrence of isolation；Adjustment setting time can be listened simultaneously, and to avoid the problem that shield mortar, there are haul distances.
Description
Technical field
The present invention relates to Shield Construction Technique field more particularly to a kind of premixing shield grouting material fluidity test methods.
Background technique
The fast development of in the 21st century, China's economic accelerates the construction of urbanization.With the raising of urban compact degree
With being continuously increased for skyscraper quantity, earth's surface can be fewer and fewer using space.Effective use and the exploitation underground space become most
Good selection excavates the underground space by large-scale use, in particular on subway engineering using shield method.Shield-tunneling construction process
In, the diameter of shield inner walls is greater than the outer diameter of pipe-plate lining, in order to which the installation of lining cutting and the construction of shield curve need；
Shield cutting diameter is greater than shield machine outer diameter, and along with the thickness of shield shell, which forms theoretic shield gaps.
The reason of stratum settlement mainly shield tail be detached from section of jurisdiction after, surrounding soil loses support will be mobile to section of jurisdiction, be formed by stratum
Loosening needs timely to fill reinforcing, is otherwise bound to cause stratum settlement, and then influences all kinds of buildings of earth's surface and underground utilities
Facility.In order to reduce influence of the shield-tunneling construction to formation displacement, it is necessary to effectively be filled, that is, carried out same to shield tail gap
Walk slip casting.And whether synchronous grouting technology, especially the selection of grouting are reasonable, are essential key auxiliary in shield method
Assistant engineer's method is the key that control surface subsidence and tunnel subsidence (including posterior settlement).
Subway mostly is built in the whole nation at present, and the synchronous grouting in shield-tunneling construction generallys use Site, and Site is deposited
In problems, if mortar quality is uncontrollable, there is isolation lamination, unstable product quality；Premixing shield mortar does not have to
Raw material place is arranged at the scene, is saved construction site, is not also generated fugitive dust, it is environmentally protective.Certain premixing shield mortar has
The problem of haul distance, but setting time can be adjusted by adjusting mortar special additive.
Summary of the invention
For the problems in the relevant technologies, the present invention proposes a kind of premixing shield grouting material fluidity test method, with gram
Take above-mentioned technical problem present in existing the relevant technologies.
The technical scheme of the present invention is realized as follows:
A kind of premixing shield grouting material fluidity test method, including cement, flyash, admixture, bentonite, fine sand,
Additive and water, wherein the main ingredient of the admixture is flyash and ground granulated blast furnace slag, and the bentonite is sodium
Base bentonite.
Further, the additive is non-ionic celluloses ether, saccharide compound, polycarboxylic acid slump retaining agent, starch
Ether and magnetic hydrotalcite.
Further, specific step is as follows；
1, a certain amount of water is added in stirring container, is poured slowly into stirring container in 2kg, mixes slowly 30s, and
After a certain amount of mixing water is added, then mix slowly 60s；
2, it shuts down, the powder on stirring blade, chamber wall is scraped in slurry, then mix slowly 90s；
3, after stirring, 700ml slurry is taken using the measuring container that Marsh funnel is equipped with, pours into and blocks bottom with finger
In the Marsh funnel in portion, then be placed in measuring container 500ml below funnel on one side, removes finger and timing, records slurry
Fill the time of 500ml container.
Further, the slurry fills the fluidity that the time of 500ml container is slurry, and experimental result precision arrives
1s。
Further, premixing shield grouting material includes single slurry type and dual slurry type, wherein the single slurry type is in building site
Soil layer gap can be injected after adding water and stirring uniformly, and voluntarily condensation hardening, the dual slurry type are infused after building site adds water and stirs
Bury lamellar spacing and with bath of glass it is compound after rapidly condensation harden.
Further, by the sodium silicate solution for being 25Be with Baume degrees without sand cement base-material slurry with fluidity, by body
After product is than 8:1 mixing, the performance of mixed slurry is tested.
The beneficial effects of the present invention are: the shield slurry as made from this method, can be divided into single slurry type and dual slurry
Type, wherein one-pack-type can test whether to meet the requirements from appearance, performance setting time, unity rate and compression strength；It is double
Liquid type can pass through appearance, the performance setting time without sand cement base-material slurry, the performance setting time of mixed slurry, unity rate
It is judgment criteria with compression strength, can control the quality of mortar, avoid the occurrence of isolation；When adjustment can be listened to condense simultaneously
Between to avoid the problem that shield mortar, there are haul distances.
Specific embodiment
It is clearly and completely described below in conjunction with the technical solution in the embodiment of the present invention, it is clear that described
Embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.
According to an embodiment of the invention, providing a kind of premixing shield grouting material fluidity test method.
Premixing shield grouting material fluidity test method according to an embodiment of the present invention, including cement, flyash, blending
Material, bentonite, fine sand, additive and water, wherein the main ingredient of the admixture be flyash and ground granulated blast furnace slag,
The bentonite is sodium bentonite.
In one embodiment, the additive is non-ionic celluloses ether, saccharide compound, polycarboxylic acid guarantor are collapsed
Agent, starch ether and magnetic hydrotalcite.
In one embodiment, specific step is as follows；
1, a certain amount of water is added in stirring container, is poured slowly into stirring container in 2kg, mixes slowly 30s, and
After a certain amount of mixing water is added, then mix slowly 60s；
2, it shuts down, the powder on stirring blade, chamber wall is scraped in slurry, then mix slowly 90s；
3, after stirring, 700ml slurry is taken using the measuring container that Marsh funnel is equipped with, pours into and blocks bottom with finger
In the Marsh funnel in portion, then be placed in measuring container 500ml below funnel on one side, removes finger and timing, records slurry
Fill the time of 500ml container.
In one embodiment, the slurry fills the fluidity that the time of 500ml container is slurry, experimental result
Precision is to 1s.
In one embodiment, premixing shield grouting material includes single slurry type and dual slurry type, wherein the single slurry type
Soil layer gap can be injected after building site adds water and stirs uniformly, and voluntarily condensation hardening, the dual slurry type are stirred in building site Jia Shui
Soil layer gap is injected after mixing and is hardened with the compound rear condensation rapidly of bath of glass.
It in one embodiment, will be molten for the sodium metasilicate of 25Be with Baume degrees without sand cement base-material slurry with fluidity
Liquid tests the performance of mixed slurry after 8:1 mixing by volume.
In addition, premixing shield grouting material shows the test method of setting time during specific implementation:
A, 250ml beaker is placed on horizontal undisturbed platform.
B, by the slurry injection 250ml beaker with standard flow degree being stirred, make slurry upper surface and 200ml
Scale maintains an equal level.
C, the timing since when adding water and stirring, until beaker 45 degree of slurries of inclination not flowed out to the time of beaker, as shield
The performance setting time t of grout material1。
D, setting time t will be showed1The sodium silicate solution that satisfactory biliquid slurry head and Baume degrees are 25Be presses matter
Amount is poured into beaker than 8:1, is quickly stirred with glass bar or sticking plaster etc., is uniformly mixed mixed liquor as early as possible, pays attention to observing cup
Middle mixing liquid status stops stirring after mixed liquor thickening, and intermittence shakes beaker, stops timing after mixed liquor is motionless.
E, the timing since mixing two kinds of slurries, until mixed slurry is shaken and the motionless time, the as table of biliquid material
Existing setting time t3。
The performance of the premixing shield grouting material of mortar depositing construction in the form of single slurry:
The performance of the premixing shield grouting material of mortar depositing construction in the form of dual slurry:
Wherein, one-pack-type: appearance, performance setting time, unity rate, compression strength；Dual liquid type: appearance, without sand cement base
The performance setting time of slurry, the performance setting time of mixed slurry, unity rate, compression strength are judgment criteria.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited to
This, anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention
And its inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. a kind of premixing shield grouting material fluidity test method, which is characterized in that including cement, flyash, admixture, swelling
Soil, fine sand, additive and water, wherein the main ingredient of the admixture is flyash and ground granulated blast furnace slag, the swelling
Soil is sodium bentonite.
2. a kind of premixing shield grouting material fluidity test method according to claim 1, which is characterized in that described additional
Agent is non-ionic celluloses ether, saccharide compound, polycarboxylic acid slump retaining agent, starch ether and magnetic hydrotalcite.
3. a kind of premixing shield grouting material fluidity test method according to claim 1, specific step is as follows；
(1) a certain amount of water is added in stirring container, then 2kg is poured slowly into stirring container, mixes slowly 30s, then
A certain amount of mixing water is added, then mixes slowly 60s；
(2) it shuts down, the powder on stirring blade, chamber wall is scraped in slurry, then mix slowly 90s；
(3) after stirring, 700ml slurry is taken using the measuring container that Marsh funnel is equipped with, pours into and blocks bottom with finger
In Marsh funnel, then be placed in measuring container 500ml below funnel on one side, removes finger and timing, and record slurry fills
The time of 500ml container.
4. a kind of premixing shield grouting material fluidity test method according to claim 3, which is characterized in that the slurry
The time for filling 500ml container is the fluidity of slurry, experimental result precision to 1s.
5. a kind of premixing shield grouting material fluidity test method according to claim 1, which is characterized in that premixing shield
Grout material includes single slurry type and dual slurry type, wherein the single slurry type can inject soil layer after building site adds water and stirs uniformly
Gap, and voluntarily condensation hardening, the dual slurry type injected after building site adds water and stirs soil layer gap and with bath of glass it is compound after
Condensation hardening rapidly.
6. a kind of premixing shield grouting material fluidity test method according to claim 1, which is characterized in that will have stream
The sodium silicate solution for being 25Be with Baume degrees without sand cement base-material slurry of dynamic degree tests mixed slurry after 8:1 mixing by volume
Performance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910088382.0A CN110044775A (en) | 2019-01-30 | 2019-01-30 | A kind of premixing shield grouting material fluidity test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910088382.0A CN110044775A (en) | 2019-01-30 | 2019-01-30 | A kind of premixing shield grouting material fluidity test method |
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| Publication Number | Publication Date |
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| CN110044775A true CN110044775A (en) | 2019-07-23 |
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| CN201910088382.0A Pending CN110044775A (en) | 2019-01-30 | 2019-01-30 | A kind of premixing shield grouting material fluidity test method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111393128A (en) * | 2020-04-02 | 2020-07-10 | 上海隧道工程有限公司 | Double-liquid type shield synchronous grouting liquid and preparation method thereof |
| CN112592138A (en) * | 2020-12-31 | 2021-04-02 | 中铁十局集团有限公司 | Single-component active synchronous mortar with controllable setting time and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106904888A (en) * | 2017-03-13 | 2017-06-30 | 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 |
-
2019
- 2019-01-30 CN CN201910088382.0A patent/CN110044775A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106904888A (en) * | 2017-03-13 | 2017-06-30 | 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 |
Non-Patent Citations (2)
| Title |
|---|
| 张程浩 等: "预拌盾构注浆料的试验研究", 《建筑技术》 * |
| 徐亚玲 等: "同步注浆特种干混砂浆的应用研究", 《上海建设科技》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111393128A (en) * | 2020-04-02 | 2020-07-10 | 上海隧道工程有限公司 | Double-liquid type shield synchronous grouting liquid and preparation method thereof |
| CN112592138A (en) * | 2020-12-31 | 2021-04-02 | 中铁十局集团有限公司 | Single-component active synchronous mortar with controllable setting time and preparation method thereof |
| CN112592138B (en) * | 2020-12-31 | 2022-07-12 | 中铁十局集团有限公司 | Single-component active synchronous mortar with controllable setting time and preparation method thereof |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190723 |
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| RJ01 | Rejection of invention patent application after publication |