CN105295933A - Soil modifier for earth pressure balance shield - Google Patents
Soil modifier for earth pressure balance shield Download PDFInfo
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- CN105295933A CN105295933A CN201510820378.0A CN201510820378A CN105295933A CN 105295933 A CN105295933 A CN 105295933A CN 201510820378 A CN201510820378 A CN 201510820378A CN 105295933 A CN105295933 A CN 105295933A
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Abstract
The invention relates to a soil modifier for earth pressure balance shield. The soil modifier is a foaming agent mixed from a foaming agent, a foam stabilizing agent and water. The foaming agent comprises of sodium alkyl sulfate, alkylbenzene sulfonate, alpha-alkenyl sodium sulfonate and fatty alcohol-polyoxyethylene ether. Each group is in the following weight percentage: 1-13% of sodium alkyl sulfate, 0.3-18% of alkylbenzene sulfonate, 0.5-15% of alpha-alkenyl sodium sulfonate, 0.5-3% of fatty alcohol-polyoxyethylene ether, 0.1-2% of foam stabilizing agent and the balance of water. The soil modifier can be used for earth pressure balance shield construction, has good stabilizing effect on excavation faces of different geological structures. Compared with other foaming agents, the soil modifier has higher foaming expansion rate and better stability, and can better improve the plastic flow property and permeability of soil body.
Description
Technical field
The present invention relates to a kind of shielded construction material, be mainly used in the soil improvement of earth pressure balanced shield, EPBS construction.
Background technology
China is in the important period of the underground engineering construction fast developments such as city underground, especially in recent years, shield construction is almost all have employed in the urban subway tunnel construction such as Beijing, Shanghai, Guangzhou and Nanjing, and except the special bid section of minority uses slurry type shield, other shield structure type overwhelming majority all have employed compound earth pressure balanced shield.Not only cost is inexpensively for earth pressure balanced shield method, and can take in pressure tank, inject soil mass property method in adding material adjustment pressure tank, to be applicable to many geologic conditions, therefore be widely used in the various engineerings of China, become the main flow of China's shield tunnel technology, thus also make the market demand of earth pressure balanced shield, EPBS additive very large.
In the construction of earth pressure balanced shield, EPBS, the dregs of excavation not only needs the stable of bearing surface, will be convenient to transmit simultaneously, so dregs must have good viscous deformation and soft denseness, internal friction angle and the little characteristic of rate of permeation, general soil does not possess these characteristics, needs to carry out soil improvement.Soil improvement agent mainly contains clay, wilkinite, foaming agent, super absorbent resin, tackifier etc., compared with other modification method, foam improved method have soil property suitability strong, reduce cutter head torque, reduce tool wear and obstruction, Plastic flow of soil mobility in adjustment soil cabin, dregs is pollution-free and the advantage such as easy process, therefore conventional foaming agent is as soil improvement agent.But at present, still there is froth stability difference in foam improving technology, expansion ratio is low, to problems such as the adaptability of Different Strata there are differences.
Summary of the invention
The object of this invention is to provide a kind of newly for the agent of earth pressure balanced shield, EPBS soil improvement, this modifying agent all has satisfactory stability effect to the excavation face of different geologic framework, and there is higher foaming and intumescing multiplying power, better stability, creeping and the perviousness of the soil body can better be improved.
The concrete technical scheme realizing the object of the invention is:
A kind of earth pressure balanced shield, EPBS soil improvement agent, feature is that this modifying agent is mixed by pore forming material, suds-stabilizing agent and water, and its weight percent is:
Pore forming material 2.3 ~ 49%
Suds-stabilizing agent 0.1 ~ 2%
Surplus is water;
Wherein, described pore forming material comprises alkyl-sulphate, alkylbenzene sulfonate, α-sodium olefin sulfonate and fatty alcohol-polyoxyethylene ether, and each substance weight per-cent is:
Alkyl-sulphate 1 ~ 13%
Alkylbenzene sulfonate 0.3 ~ 18%
α-sodium olefin sulfonate 0.5 ~ 15%
Fatty alcohol-polyoxyethylene ether 0.5 ~ 3%
Described suds-stabilizing agent is one or more mixing in silicone resin polyethers emulsion, carboxyl methyl cellulose, polyacrylamide and cocoanut fatty acid diethanolamide.
Described alkyl-sulphate is one or more mixing in sodium lauryl sulphate, ammonium lauryl sulfate, Sodium palmityl sulfate and sodium stearyl sulfate.
Described alkylbenzene sulfonate is one or more mixing in Sodium dodecylbenzene sulfonate, tetradecyl benzene sulfonic acid sodium salt, cetyl benzenesulfonic acid sodium.
Described pore forming material is that aniorfic surfactant and nonionogenic tenside are composite.Anion surfactant price is low, and application is wide, and foaming power is strong, two kinds in pore forming material preferred alkyl vitriol, alkylbenzene sulfonate, α-sodium olefin sulfonate and fatty alcohol-polyoxyethylene ether and compositely to obtain above.Alkyl-sulphate is preferably soluble in water, good with other tensio-active agent compatibleness, has extraordinary foaming power, as sodium lauryl sulphate, and Sodium palmityl sulfate and sodium stearyl sulfate etc.Alkylbenzene sulfonate is yellow oily liquid, has good foaming power and froth stability, the one in preferred Sodium dodecylbenzene sulfonate, tetradecyl benzene sulfonic acid sodium salt, cetyl benzenesulfonic acid sodium or two kinds and above mixture.Preferred α-the sodium olefin sulfonate of nonionogenic tenside, its solvability, whipability are all good, even also have outstanding foaming properties in hard water.
Described suds-stabilizing agent is silicone resin polyethers emulsion, carboxymethyl cellulose, polyacrylamide and cocoanut fatty acid diethanolamide one or both and above mixture.Wherein, silicone resin polyethers emulsion class and linear anionic surfactants as composite in sodium lauryl sulphate, α-sodium olefin sulfonate and Sodium dodecylbenzene sulfonate etc., have excellent foam stabilizing effect, functional, steady bubble is lasting; Cocoanut fatty acid diethanolamide, adds in foaming liquid, strengthens the interaction between surface adsorbed molecules by synergy, surface adsorption film toughness is increased, to improve the quality of film, increases the elasticity of film, reduce the ventilation property of foam, thus improve the stability of foam.Carboxymethyl cellulose and polyacrylamide belong to increase stickiness suds-stabilizing agent, mainly slowing down the discharge opeing speed of foam by improving liquid phase viscosity, improving the stability of foam, thus obviously can extend the transformation period of foam.
The present invention has the following advantages: preparation flow is simple, and speed is water-soluble, compared with other Soil pressure balance shield foam agent, also can show higher foaming and intumescing multiplying power, longer transformation period and better froth stability when concentration is lower.
Embodiment
Below in conjunction with embodiment, the present invention is described in detail.
embodiment 1
The weight percent of each feed composition is:
Sodium lauryl sulphate 10.0%
Sodium dodecylbenzene sulfonate 1.0%
α-sodium olefin sulfonate 5.0%
Fatty alcohol-polyoxyethylene ether 0.5%
Silicone resin polyethers emulsion 0.3%
Water 83.2%
Under normal temperature, each component is mixed in proportion low rate mixing even, regulates pH to be about 6, namely obtain the soil improvement agent of the embodiment of the present invention 1.
embodiment 2
The weight percent of each feed composition is:
Sodium lauryl sulphate 12.0%
Sodium dodecylbenzene sulfonate 3.0%
α-sodium olefin sulfonate 0.5%
Fatty alcohol-polyoxyethylene ether 0.5%
Silicone resin polyethers emulsion 0.3%
Carboxymethyl cellulose 0.2%
Water 83.5%
Under normal temperature, each component is mixed in proportion low rate mixing even, is about 6 with adjustment pH, namely obtains the soil improvement agent of the embodiment of the present invention 2.
embodiment 3
Sodium lauryl sulphate 5.0%
Dodecylbenzene sodium sulfonate 0.3%
α-sodium olefin sulfonate 15.0%
Fatty alcohol-polyoxyethylene ether 0.5%
Cocoanut fatty acid diethanolamide 0.7%
Carboxymethyl cellulose 0.2%
Water 78.3%
Under normal temperature, each component is mixed in proportion low rate mixing even, regulates pH to be about 6, namely obtain the soil improvement agent of the embodiment of the present invention 3.
experimental example 1
In order to evaluate foaming agent of the present invention and other commercially available prod performance difference, using expansion ratio and stability as its evaluation index.According to document, the frothing percentage being applied to the foaming agent in shield machine with soil pressure balance for construction is at present 5 ~ 20; Froth stability or transformation period should be greater than 5min.
Adopt under room temperature 200ml0.5%(admittedly containing) foaming agent solution, prepare foam by constant stir speed (S.S.) (being greater than 1000rpm) and churning time (3min), to compared with expansion ratio and half foam life period, the results are shown in Table shown in 1.
Table 1 frostproof froth n. multiplying power and transformation period compare
| pH | Expansion ratio | Transformation period/min | |
| Embodiment 1 | 6 | 8.1 | 13.1 |
| Embodiment 2 | 6 | 8.1 | 10.8 |
| Embodiment 3 | 6 | 8.5 | 11.6 |
| Safe rainbow sound (THS-266) | 6 | 6.2 | 8.3 |
| Huo Dun (xoptoh-9) | 6 | 6.0 | 8.2 |
The basic index of the foaming agent in above-described embodiment and regular foam agent are on the market contrasted, can be found out by the contrast of table 1, foaming agent in the embodiment of the present invention is higher than the expansion ratio of common commercially available foaming agent, and the transformation period is longer, and stability is better.
experimental example 2
The permeability coefficient of foams mix soil is an important indicator of foam improvement soil capability quality, adopts varying head permeator to measure.Utilize self-control sand simulation foam Modified soil body, wherein (0.15 ~ 0.3mm accounts for 20% to sand grating, and 0.3 ~ 0.6mm accounts for 45%, 0.6 ~ 1.18mm accounts for 35%), water ratio is 10%, and consistency of foam is 0.5%, foam input rate is about 22%(volume/mass), experimental result is in table 2.
Table 2 sand-foams mix soil permeability coefficient contrast
| Permeability coefficient/(cm/s) | Embodiment 1 | Safe rainbow sound (THS-266) | Blank |
| 0 | 5.8×10 -4 | 7.5×10 -4 | 1.5×10 -3 |
| 1h | 2.0×10 -4 | 5.4×10 -4 | - |
| 2h | 3.7×10 -4 | 5.7×10 -4 | - |
| 3h | 1.4×10 -4 | 6.1×10 -4 | - |
| 4h | 1.2×10 -3 | 1.0×10 -3 | - |
Foaming agent in embodiment and commercially available foaming agent are carried out infiltrative contrast, and foaming agent and the safe rainbow sound (THS-266) of embodiment 1 can make the permeability coefficient of original soil by the order of magnitude 10
-3be reduced to 10
-4, but the permeability coefficient of embodiment 1 is lower than safe rainbow sound, illustrates that embodiment 1 can reduce the permeability coefficient of the soil body better.
Claims (3)
1. an earth pressure balanced shield, EPBS soil improvement agent, is characterized in that: this modifying agent is mixed by pore forming material, suds-stabilizing agent and water, and its weight percent is:
Pore forming material 2.3 ~ 49%
Suds-stabilizing agent 0.1 ~ 2%
Surplus is water;
Wherein, described pore forming material comprises alkyl-sulphate, alkylbenzene sulfonate, α-sodium olefin sulfonate and fatty alcohol-polyoxyethylene ether, and each substance weight per-cent is:
Alkyl-sulphate 1 ~ 13%
Alkylbenzene sulfonate 0.3 ~ 18%
α-sodium olefin sulfonate 0.5 ~ 15%
Fatty alcohol-polyoxyethylene ether 0.5 ~ 3%
Described suds-stabilizing agent is one or more mixing in silicone resin polyethers emulsion, carboxyl methyl cellulose, polyacrylamide and cocoanut fatty acid diethanolamide.
2. soil improvement agent according to claim 1, is characterized in that: described alkyl-sulphate is one or more mixing in sodium lauryl sulphate, ammonium lauryl sulfate, Sodium palmityl sulfate and sodium stearyl sulfate.
3. soil improvement agent according to claim 1, is characterized in that: described alkylbenzene sulfonate is one or more mixing in Sodium dodecylbenzene sulfonate, tetradecyl benzene sulfonic acid sodium salt, cetyl benzenesulfonic acid sodium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510820378.0A CN105295933A (en) | 2015-11-24 | 2015-11-24 | Soil modifier for earth pressure balance shield |
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| CN201510820378.0A CN105295933A (en) | 2015-11-24 | 2015-11-24 | Soil modifier for earth pressure balance shield |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105885867A (en) * | 2016-05-25 | 2016-08-24 | 重庆科技学院 | Residue soil improver for waterless gravel backfilled stratum shield driving construction |
| CN105969368A (en) * | 2016-05-16 | 2016-09-28 | 四川恒泽建材有限公司 | Foaming agent for shield tunnelling machine and preparation method of foaming agent |
| CN106433679A (en) * | 2016-10-10 | 2017-02-22 | 中昊(大连)化工研究设计院有限公司 | Acid-resistant shield foaming agent |
| CN107312545A (en) * | 2017-05-27 | 2017-11-03 | 中昊(大连)化工研究设计院有限公司 | A kind of shield foaming agent for producing high viscosity foam |
| CN107376777A (en) * | 2017-08-07 | 2017-11-24 | 广州劲诺新型材料科技有限公司 | A kind of foaming agent for shield machine and preparation method thereof |
| CN107603629A (en) * | 2017-09-18 | 2018-01-19 | 广东省建筑科学研究院集团股份有限公司 | A kind of environment-friendly type shield foaming agent and preparation method thereof |
| CN108035722A (en) * | 2017-12-11 | 2018-05-15 | 上海市基础工程集团有限公司 | Earth pressure balanced shield, EPBS high permeability sand modification method |
| CN108192624A (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 lubrication foam formulation suitable for sand-pebble layer |
| CN108531187A (en) * | 2018-04-11 | 2018-09-14 | 北京市政建设集团有限责任公司 | A kind of balancing earth-pressure shielding machine construction foaming agent and preparation method |
| CN108774535A (en) * | 2018-06-22 | 2018-11-09 | 湖北工程学院 | A kind of special foaming agent of shield machine and its preparation method and application |
| CN109054842A (en) * | 2018-08-01 | 2018-12-21 | 中铁四局集团有限公司 | A kind of earth pressure balanced shield, EPBS sediment improvement foaming agent and preparation method thereof |
| CN110157446A (en) * | 2019-05-13 | 2019-08-23 | 中铁第五勘察设计院集团有限公司 | A kind of dispersing agent and preparation method thereof for improveing clay |
| CN110935393A (en) * | 2019-12-12 | 2020-03-31 | 陕西速源节能科技有限公司 | Environment-friendly foam preparation and preparation method thereof |
| CN116445164A (en) * | 2023-03-31 | 2023-07-18 | 中铁建华南建设(广州)高科技产业有限公司 | Foaming agent composition, foaming agent for shield, preparation method and application |
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| CN101717221A (en) * | 2009-11-24 | 2010-06-02 | 中国矿业大学(北京) | Foaming agent for soil engineering |
| CN103708757A (en) * | 2013-11-29 | 2014-04-09 | 中铁三局集团有限公司 | Foaming agent for soil pressure balance shield machine |
| CN103964726A (en) * | 2013-01-24 | 2014-08-06 | 北京交通大学 | Foaming agent for earth pressure balance shield |
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Patent Citations (3)
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| CN101717221A (en) * | 2009-11-24 | 2010-06-02 | 中国矿业大学(北京) | Foaming agent for soil engineering |
| CN103964726A (en) * | 2013-01-24 | 2014-08-06 | 北京交通大学 | Foaming agent for earth pressure balance shield |
| CN103708757A (en) * | 2013-11-29 | 2014-04-09 | 中铁三局集团有限公司 | Foaming agent for soil pressure balance shield machine |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105969368A (en) * | 2016-05-16 | 2016-09-28 | 四川恒泽建材有限公司 | Foaming agent for shield tunnelling machine and preparation method of foaming agent |
| CN105885867A (en) * | 2016-05-25 | 2016-08-24 | 重庆科技学院 | Residue soil improver for waterless gravel backfilled stratum shield driving construction |
| CN106433679B (en) * | 2016-10-10 | 2019-07-09 | 中昊(大连)化工研究设计院有限公司 | Acid resistance shield foaming agent |
| CN106433679A (en) * | 2016-10-10 | 2017-02-22 | 中昊(大连)化工研究设计院有限公司 | Acid-resistant shield foaming agent |
| CN107312545A (en) * | 2017-05-27 | 2017-11-03 | 中昊(大连)化工研究设计院有限公司 | A kind of shield foaming agent for producing high viscosity foam |
| CN107376777A (en) * | 2017-08-07 | 2017-11-24 | 广州劲诺新型材料科技有限公司 | A kind of foaming agent for shield machine and preparation method thereof |
| CN107603629A (en) * | 2017-09-18 | 2018-01-19 | 广东省建筑科学研究院集团股份有限公司 | A kind of environment-friendly type shield foaming agent and preparation method thereof |
| CN108035722A (en) * | 2017-12-11 | 2018-05-15 | 上海市基础工程集团有限公司 | Earth pressure balanced shield, EPBS high permeability sand modification method |
| CN108192624A (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 lubrication foam formulation suitable for sand-pebble layer |
| CN108531187A (en) * | 2018-04-11 | 2018-09-14 | 北京市政建设集团有限责任公司 | A kind of balancing earth-pressure shielding machine construction foaming agent and preparation method |
| CN108774535A (en) * | 2018-06-22 | 2018-11-09 | 湖北工程学院 | A kind of special foaming agent of shield machine and its preparation method and application |
| CN109054842A (en) * | 2018-08-01 | 2018-12-21 | 中铁四局集团有限公司 | A kind of earth pressure balanced shield, EPBS sediment improvement foaming agent and preparation method thereof |
| CN110157446A (en) * | 2019-05-13 | 2019-08-23 | 中铁第五勘察设计院集团有限公司 | A kind of dispersing agent and preparation method thereof for improveing clay |
| CN110935393A (en) * | 2019-12-12 | 2020-03-31 | 陕西速源节能科技有限公司 | Environment-friendly foam preparation and preparation method thereof |
| CN116445164A (en) * | 2023-03-31 | 2023-07-18 | 中铁建华南建设(广州)高科技产业有限公司 | Foaming agent composition, foaming agent for shield, preparation method and application |
| CN116445164B (en) * | 2023-03-31 | 2024-04-05 | 中铁建华南建设(广州)高科技产业有限公司 | Foaming agent composition, foaming agent for shield, preparation method and application |
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Application publication date: 20160203 |