CN104177008A - Formula of high-dispersion slurry for slurry shield - Google Patents
Formula of high-dispersion slurry for slurry shield Download PDFInfo
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- CN104177008A CN104177008A CN201410394972.3A CN201410394972A CN104177008A CN 104177008 A CN104177008 A CN 104177008A CN 201410394972 A CN201410394972 A CN 201410394972A CN 104177008 A CN104177008 A CN 104177008A
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Abstract
The invention relates to a formula of high-dispersion slurry for a slurry shield. The high-dispersion slurry is composed of bentonite, water, sodium carbonate, sodium carboxymethyl cellulose (CMC) and a polycarboxylic acid superdispersant, wherein sodium carbonate accounts for 0.01-0.1% of the mass percent of bentonite, CMC accounts for 0.1-20% of the mass percent of bentonite, the polycarboxylic acid superdispersant accounts for 0.1-7% of the mass percent of bentonite, and total solids account for 1-5% of the mass percent of the water. The formula is characterized in that the polycarboxylic acid superdispersant is used. The slurry disclosed by the invention can be used for slurry balance shield construction, has a favorable stabilizing effect for excavation faces with different geologic structures and has better dispersibility, lower water loss as well as more excellent sand carrying capacity and stability as comparison with other kinds of common slurry.
Description
Technical field
The present invention relates to a kind of shielded construction application material, particularly a kind of formula of the high dispersive mud for slurry shield.
Background technology
In slurry balance shield construction process, supporting mud is being played the part of vital role: shield structure need to produce mud and water balance effect by mud pressure and earth balance pressure, could effectively support the front soil body, mud can form mud film in excavation face soil body surface, mud film thickness increases with penetration time, thereby effectively improves infiltration resistibility; Mud has certain prop-carrying capacity, can bring to ground.So the mud of superperformance is slurry shield one of the prerequisite of carrying out smoothly of constructing.
Wilkinite has stronger water absorbability and swelling property, the water of adsorbable 8～15 times of own vols, volumetric expansion can be up to 30 times, in water medium, can be dispersed into as a form of gel and suspension, this medium has certain viscous variability and oilness, there is stronger cation exchange capacity (CEC), therefore wilkinite is widely used in slurry balance shield construction.But common bentonite base mud composition is simple, function singleness, dispersed poor, be difficult to meet the construction requirement of Different Strata, especially on gravel stratum, can not form well mud film.The performance of mud and the dispersiveness of its interior media have much relations, and the mud property performance of good dispersity is excellent, and the mud of for this reason developing a kind of high dispersive is necessary.
Summary of the invention
The object of the invention is to make up the deficiency in background technology, propose a kind of new high dispersive mud prescription for slurry balance shield, can adapt to the slurry balance shield construction of matter structure variously.
For achieving the above object, technical scheme of the present invention is: a kind of high dispersive mud prescription for slurry shield, described high dispersive mud is made up of wilkinite, water, soda ash, Xylo-Mucine CMC, polycarboxylic acid hyperdispersant, wherein to account for bentonitic mass percent be 0.01 ~ 0.1% to soda ash, it is 0.1 ~ 20% that CMC accounts for bentonitic mass percent, it is 0.1 ~ 7% that polycarboxylic acid hyperdispersant accounts for bentonitic mass percent, and the mass percent that total solids accounts for water is 1 ~ 5%.
Wilkinite is a kind of clay rock, also claims montmorillonite clay rock.Wilkinite has strong water absorbability and swelling property, the water yield of adsorbable 8～15 times of own vols, and volumetric expansion can reach several times to 30 times; In water medium, can be dispersed into as a form of gel and suspension, this medium solution has certain glutinousness, variability and oilness; There is stronger cation exchange capacity (CEC); Various gas, liquid, organic substance are had to certain adsorptive power, and maximal absorptive capacity can reach 5 times to the weight of self; The admixture of it and water, mud or fine sand has plasticity-and agglutinating value(of coal).
Described wilkinite can be sodium bentonite, calcium-base bentonite, hydrogen base bentonite, organobentonite one or more, be preferably sodium bentonite.
Sodium carbonate is mainly used for improving the pH value of mud.Larger pH value can improve viscosity and the stability of mud, thereby improves the performance of mud, and sodium carbonate can also play the effect of sodium-ionized bentonite.
CMC is a kind of high molecular polymer, and a kind of important water soluble anionic surfactant has the effects such as bonding, thickening, enhancing, emulsification, water conservation, suspension.CMC can make excavation face form Bao Erjian, filter cake that perviousness is low, reduces fluid loss, and CMC can make mud stable, extends its presence, can also resist the pollution of various solubility salts.The CMC of high viscosity, high substitution value is applicable to the mud that density is less, and the CMC of low viscosity high substitution value is applicable to the mud that density is large.Described high dispersive mud preferably adopts the CMC of high viscosity, high substitution value.
CMC is the typical additives with mud as slurry shield, although have certain dispersion effect, its Main Function is tackify.For making the mud of high dispersive, in high dispersive mud of the present invention, add polycarboxylic acid hyperdispersant.Polycarboxylic acid hyperdispersant is a kind of high molecular polymer of comb-type structure, has excellent dispersiveness, is used in bentonite base mud and can makes mud colloid more uniform and stable.The dispersion effect of poly carboxylic acid is relevant with its structure and molecular weight.From structure, polycarboxylic acid hyperdispersant is divided into polyester type and polyether-type, preferably uses polyester type poly carboxylic acid herein.The poly carboxylic acid of same structure, molecular-weight average is excessive or too small, all can affect its dispersiveness and consistency, and preferred molecular weight is 10,000 ~ 100,000.
A kind of high dispersive mud of the present invention has the following advantages: mud slurry good dispersion property, compared with traditional slurry shield slurry, can form the mud that stability is more excellent, and show as after leaving standstill a couple of days and still have very high colloidity; High dispersive mud of the present invention has fluid loss still less, reduces approximately 10% than the regular mud fluid loss of same concentrations on the market; High dispersive mud of the present invention also has more excellent prop-carrying capacity, and its good dispersing property can better be scattered in mud drilled clay or sand.
Embodiment
The invention provides a kind of high dispersive mud prescription for slurry shield, it is characterized in that: mud is made up of wilkinite, water, soda ash, Xylo-Mucine CMC, polycarboxylic acid hyperdispersant, wherein to account for bentonitic mass percent be 0.01 ~ 0.1% to soda ash, it is 0.1 ~ 20% that CMC accounts for bentonitic mass percent, it is 0.1 ~ 7% that polycarboxylic acid hyperdispersant accounts for bentonitic mass percent, and the mass percent that total solids accounts for water is 1 ~ 5%.The polycarboxylic acid hyperdispersant using, for polyester type poly carboxylic acid or polyether-type poly carboxylic acid, preferably uses polyether-type poly carboxylic acid; The polycarboxylate dispersant's weight-average molecular weight using is 10,000 ~ 100,000.
Specific embodiment 1:
High dispersive grout formula for slurry shield comprises sodium bentonite, water, soda ash, CMC-HV, polycarboxylic acid hyperdispersant, wherein to account for bentonitic mass percent be 0.1% to soda ash, it is 20% that CMC accounts for bentonitic mass percent, it is 2.0% that polycarboxylic acid hyperdispersant accounts for bentonitic mass percent, the mass percent that total solids accounts for water is 1%, in the present embodiment, use polycarboxylic acid hyperdispersant sd-a, provided by three auspicious macromolecular material company limiteds, a kind of polyether-type poly carboxylic acid, weight-average molecular weight 50,000.
Specific embodiment 2:
High dispersive grout formula for slurry shield comprises sodium bentonite, water, soda ash, CMC-HV, polycarboxylic acid hyperdispersant, wherein to account for bentonitic mass percent be 0.05% to soda ash, it is 3% that CMC accounts for bentonitic mass percent, it is 0.5% that polycarboxylic acid hyperdispersant accounts for bentonitic mass percent, the mass percent that total solids accounts for water is 2%, in the present embodiment, use polycarboxylic acid hyperdispersant sd-f, provided by three auspicious macromolecular material company limiteds, a kind of polyether-type poly carboxylic acid, weight-average molecular weight 70,000.
Specific embodiment 3:
High dispersive grout formula for slurry shield comprises sodium bentonite, water, soda ash, CMC-HV, polycarboxylic acid hyperdispersant, wherein to account for bentonitic mass percent be 0.06% to soda ash, it is 5% that CMC accounts for bentonitic mass percent, it is 1.0% that polycarboxylic acid hyperdispersant accounts for bentonitic mass percent, the mass percent that total solids accounts for water is 2%, in the present embodiment, use polycarboxylic acid hyperdispersant sd-a, provided by three auspicious macromolecular material company limiteds, a kind of polyether-type poly carboxylic acid, weight-average molecular weight 50,000.
Specific embodiment 4:
[0020] comprise sodium bentonite, water, soda ash, CMC-HV, polycarboxylic acid hyperdispersant for the high dispersive grout formula of slurry shield, wherein to account for bentonitic mass percent be 0.04% to soda ash, it is 8% that CMC accounts for bentonitic mass percent, it is 0.2% that polycarboxylic acid hyperdispersant accounts for bentonitic mass percent, the mass percent that total solids accounts for water is 2%, in the present embodiment, use polycarboxylic acid hyperdispersant sd-c, provided by three auspicious macromolecular material company limiteds, a kind of polyether-type poly carboxylic acid, weight-average molecular weight 100,000.
Specific embodiment 5:
High dispersive grout formula for slurry shield comprises sodium bentonite, water, soda ash, CMC-HV, polycarboxylic acid hyperdispersant, wherein to account for bentonitic mass percent be 0.02% to soda ash, it is 1% that CMC accounts for bentonitic mass percent, it is 7.0% that polycarboxylic acid hyperdispersant accounts for bentonitic mass percent, the mass percent that total solids accounts for water is 5%, in the present embodiment, use polycarboxylic acid hyperdispersant sd-d, provided by three auspicious macromolecular material company limiteds, a kind of polyether-type poly carboxylic acid, weight-average molecular weight 10,000.
High dispersive mud in above-described embodiment 1 ~ 5 is carried out the test of basic index and contrasted with the regular mud of same concentrations on the market, as the fluid loss of mud in embodiment 1 is less than the fluid loss of the commercially available mud of 1% concentration.Contrast by following table can be found out, a kind of slurry shield high dispersive mud in embodiment is less than common commercially available fluid loss, has better permeability resistance.
Commercially available mud to the high dispersive mud in embodiment 1 ~ 5 and corresponding concentration carries out stable test comparison, finds that commercially available mud leaves standstill after 5 days colloidity for being all less than 95%, and after standing a couple of days of high dispersive mud in embodiment 1 ~ 5 colloidity all more than 96%.Absolutely prove the described more stable homogeneous of high dispersive mud in embodiment, dispersed better.
The commercially available mud of the high dispersive mud in embodiment 1 ~ 5 and corresponding concentration is carried out to the test comparison of prop-carrying capacity, the settling velocity of the sand of finding certain grating in regular mud is greater than the settling velocity in high dispersive mud, some small gravels can suspend in high dispersive mud, in regular mud, can not well suspend, but sink slowly.Show that the high dispersive mud in embodiment 1 ~ 5 has more superior prop-carrying capacity.
Claims (6)
1. the high dispersive mud prescription for slurry shield, it is characterized in that: mud is made up of wilkinite, water, soda ash, Xylo-Mucine CMC, polycarboxylic acid hyperdispersant, wherein to account for bentonitic mass percent be 0.01 ~ 0.1% to soda ash, it is 0.1 ~ 20% that CMC accounts for bentonitic mass percent, it is 0.1 ~ 7% that polycarboxylic acid hyperdispersant accounts for bentonitic mass percent, and the mass percent that total solids accounts for water is 1 ~ 5%.
2. a kind of high dispersive mud prescription for slurry shield as claimed in claim 1, is characterized in that, comprises polycarboxylic acid hyperdispersant in formula; Described polycarboxylic acid hyperdispersant is polyester type poly carboxylic acid or polyether-type poly carboxylic acid.
3. a kind of high dispersive mud prescription for slurry shield as claimed in claim 1, is characterized in that described polycarboxylic acid super-plasticizer is polyester type poly carboxylic acid.
4. a kind of high dispersive mud prescription for slurry shield as described in claim 1,2,3, is characterized in that, described polycarboxylic acid hyperdispersant, and its weight-average molecular weight is 10,000 ~ 100,000.
5. a kind of high dispersive mud prescription for slurry shield as claimed in claim 1, is characterized in that, described wilkinite is one or more in sodium bentonite, calcium-base bentonite, hydrogen base bentonite, organobentonite.
6. a kind of high dispersive mud prescription for slurry shield as claimed in claim 1, is characterized in that, described wilkinite is sodium bentonite.
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| CN201410394972.3A CN104177008A (en) | 2014-08-12 | 2014-08-12 | Formula of high-dispersion slurry for slurry shield |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105060796A (en) * | 2015-08-27 | 2015-11-18 | 河海大学 | Slurry for slurry shield sand stratum tunneling and preparation method thereof |
| CN106593451A (en) * | 2016-12-22 | 2017-04-26 | 上海三瑞高分子材料股份有限公司 | Clay shock material for controlling settlement of shield-tunneled soil body |
| CN106675538A (en) * | 2016-12-22 | 2017-05-17 | 上海三瑞高分子材料股份有限公司 | Plugging-type shield mud |
| CN109133737A (en) * | 2018-08-22 | 2019-01-04 | 天津大学 | A kind of salt resistance mud and preparation method thereof being adapted to seabed shield-tunneling construction |
| CN109519196A (en) * | 2018-11-30 | 2019-03-26 | 中铁隧道集团二处有限公司 | The slurries stable for shield face in compound stratum |
| CN109628073A (en) * | 2018-12-06 | 2019-04-16 | 南京军盾化工科技有限公司 | Clay dispersion agent and preparation method thereof |
| CN109704685A (en) * | 2019-02-25 | 2019-05-03 | 常州工学院 | A kind of the soot anti-seepage slurry material and preparation method modified based on sodium carboxymethyl cellulose |
| CN110436836A (en) * | 2019-08-21 | 2019-11-12 | 河海大学 | SCAP formula earth pressure balanced shield, EPBS opens the cabin with mud and its preparation method |
| CN110671119A (en) * | 2019-10-09 | 2020-01-10 | 中铁五局集团有限公司城市轨道交通工程分公司 | High-performance bentonite for shield construction and preparation process of mud film of high-performance bentonite |
| CN110714459A (en) * | 2018-07-11 | 2020-01-21 | 宏润建设集团股份有限公司 | Construction method of cast-in-situ bored pile |
| CN111170685A (en) * | 2020-01-21 | 2020-05-19 | 中南大学 | Green slurry for water-rich fractured formation slurry shield construction and preparation method thereof |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105060796A (en) * | 2015-08-27 | 2015-11-18 | 河海大学 | Slurry for slurry shield sand stratum tunneling and preparation method thereof |
| CN106593451A (en) * | 2016-12-22 | 2017-04-26 | 上海三瑞高分子材料股份有限公司 | Clay shock material for controlling settlement of shield-tunneled soil body |
| CN106675538A (en) * | 2016-12-22 | 2017-05-17 | 上海三瑞高分子材料股份有限公司 | Plugging-type shield mud |
| CN110714459A (en) * | 2018-07-11 | 2020-01-21 | 宏润建设集团股份有限公司 | Construction method of cast-in-situ bored pile |
| CN109133737A (en) * | 2018-08-22 | 2019-01-04 | 天津大学 | A kind of salt resistance mud and preparation method thereof being adapted to seabed shield-tunneling construction |
| CN109519196A (en) * | 2018-11-30 | 2019-03-26 | 中铁隧道集团二处有限公司 | The slurries stable for shield face in compound stratum |
| CN109628073A (en) * | 2018-12-06 | 2019-04-16 | 南京军盾化工科技有限公司 | Clay dispersion agent and preparation method thereof |
| CN109704685A (en) * | 2019-02-25 | 2019-05-03 | 常州工学院 | A kind of the soot anti-seepage slurry material and preparation method modified based on sodium carboxymethyl cellulose |
| CN109704685B (en) * | 2019-02-25 | 2021-03-12 | 常州工学院 | Refuse dump seepage-proof pulp material based on sodium carboxymethyl cellulose modification and preparation method thereof |
| CN110436836A (en) * | 2019-08-21 | 2019-11-12 | 河海大学 | SCAP formula earth pressure balanced shield, EPBS opens the cabin with mud and its preparation method |
| CN110436836B (en) * | 2019-08-21 | 2021-10-15 | 河海大学 | Slurry for SCAP type earth pressure balance shield cabin opening and preparation method thereof |
| CN110671119A (en) * | 2019-10-09 | 2020-01-10 | 中铁五局集团有限公司城市轨道交通工程分公司 | High-performance bentonite for shield construction and preparation process of mud film of high-performance bentonite |
| CN111170685A (en) * | 2020-01-21 | 2020-05-19 | 中南大学 | Green slurry for water-rich fractured formation slurry shield construction and preparation method thereof |
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Application publication date: 20141203 |