CN106566555B - A kind of special sediment improvement agent of sand-pebble layer shield - Google Patents
A kind of special sediment improvement agent of sand-pebble layer shield Download PDFInfo
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- CN106566555B CN106566555B CN201610910641.XA CN201610910641A CN106566555B CN 106566555 B CN106566555 B CN 106566555B CN 201610910641 A CN201610910641 A CN 201610910641A CN 106566555 B CN106566555 B CN 106566555B
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- sand
- nonionic surfactant
- dregs
- pebble layer
- improvement agent
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/14—Soil-conditioning materials or soil-stabilising materials containing organic compounds only
- C09K17/18—Prepolymers; Macromolecular compounds
- C09K17/20—Vinyl polymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/14—Soil-conditioning materials or soil-stabilising materials containing organic compounds only
- C09K17/18—Prepolymers; Macromolecular compounds
- C09K17/32—Prepolymers; Macromolecular compounds of natural origin, e.g. cellulosic materials
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2103/00—Civil engineering use
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2107/00—Impermeabilisation
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a kind of special sediment improvement agent of sand-pebble layer shield, including the raw material of following mass content to be made：Antiwear additive 0.2~1.0%, anion surfactant 4.0~10.0%, nonionic surfactant A 1.0~4.0% and nonionic surfactant B 1.0~4.0% are viscosified, surplus is water, and quality total amount is 100%；The thickening antiwear additive is one or more mixtures formed of PAMA, sodium carboxymethylcellulose, hydroxyethyl cellulose.The special sediment improvement agent of the sand-pebble layer shield dramatically increases dregs cohesive strength, reduces the infiltration coefficient and internal friction angle of dregs, reduces abrasion of the dregs to equipment, improves the stream plasticity of dregs, reduces energy consumption.
Description
Technical field
The invention belongs to shield tunnel construction technology field, and in particular to a kind of special sediment improvement of sand-pebble layer shield
Agent.
Background technology
The shield type that China is applied at present is mainly earth pressure balanced shield, and the geology scope that it is adapted to is very wide
It is general.The successful key of earth pressure balanced shield, EPBS construction is effective sediment improvement.Sediment improvement is exactly by special on shield machine
Modifying agent is injected into cutterhead face, Tu Cang or conveying worm with device, is stirred using the Stirring of cutterhead, native storehouse agitating device
Mix or conveying worm Stirring makes modifying agent be mixed with dregs, its main purpose is exactly the dregs tool for cutting shield
Stream plasticity, suitable denseness, relatively low water penetration and the less frictional resistance having had, to meet to use under different geological conditions
Preferable working condition is all up during different boring mode drivings.
Sand-pebble layer is a kind of typical mechanics caving ground, with cohesive strength is small, internal friction angle is big, infiltration coefficient
Greatly, the characteristic such as poor fluidity, stability difference, current foaming agent improving technology is when sand-pebble layer tunnels, through knife cutting
Poor to the sandy gravel creeping in native storehouse, easily appearance is unearthed difficult (occlusion), gushed, boring parameter is abnormal and driving difficulty, soil
The technical problems such as pressure is difficult to set up, equipment attrition is serious.
The content of the invention
The technical problems to be solved by the invention are to be directed to above-mentioned the deficiencies in the prior art, there is provided one kind dramatically increases slag
Soil cohesion, reduces the infiltration coefficient and internal friction angle of dregs, reduces abrasion of the dregs to equipment, improve dregs stream plasticity,
Reduce the special sediment improvement agent of sand-pebble layer shield of energy consumption.
In order to solve the above technical problems, the technical solution adopted by the present invention is, a kind of special dregs of sand-pebble layer shield
Modifying agent, including the raw material of following mass content are made：Viscosify antiwear additive 0.2~1.0%, anion surfactant
4.0~10.0%, nonionic surfactant A 1.0~4.0% and nonionic surfactant B 1.0~4.0%, surplus are
Water, quality total amount are 100%；The thickening antiwear additive is PAMA, sodium carboxymethylcellulose, ethoxy fibre
The mixture of one or more compositions of dimension element.
Further, the thickening antiwear additive is 0.5~0.7%, anion surfactant is 6.0~8.0%, non-
Ionic surface active agent A is 2.0~3.0% and nonionic surfactant B is 1.5~3.0%.
Further, the anion surfactant is the one of sodium sulfate of polyethenoxy ether of fatty alcohol and sodium alkyl sulfate
The mixtures of kind or two kinds of compositions；Or the one or two for sodium sulfate of polyethenoxy ether of fatty alcohol and sodium alkyl sulfate with
The mixture of sodium alkyl benzene sulfonate composition.
Further, nonionic surfactant A is AEO, the nonionic surfactant B
For APES.
The invention also discloses a kind of above-mentioned preparation method of the special sediment improvement agent of sand-pebble layer shield, this method bag
Include as follows：The each component of above-mentioned mass content is weighed, by anion surfactant, nonionic surfactant A, nonionic table
Face activating agent B and thickening antiwear additive are sequentially added in water, and stirring makes it fully dissolve mixing, reacts and produces.
A kind of special sediment improvement agent of sand-pebble layer shield of the invention has the beneficial effect that：(1) slag can be dramatically increased
The cohesive strength of soil, internal friction angle is reduced, reduce abrasion of the dregs to equipment.(2) impermeability of dregs is improved, improves face
Stability, prevent generation of gushing.(3) the stream plasticity of dregs is improved, facilitates the output of dregs, anti-occlusion.(4) foam oozes caused by
Permeability is strong, and the soil body can be penetrated into rapidly from inlet, and its lubricity and cohesiveness can obtain quick and fully play.(5) subtract
Small cutter head torque, gross thrust is reduced, reduce energy consumption.(6) shield driving speed is improved.
Embodiment
A kind of special sediment improvement agent of sand-pebble layer shield of the present invention, including the raw material of following mass content are made：Increase
Viscous antiwear additive 0.2~1.0%, anion surfactant 4.0~10.0%, nonionic surfactant A 1.0~
4.0% and nonionic surfactant B 1.0~4.0%, surplus are water, and quality total amount is 100%；The thickening antiwear additive
The mixtures formed for the one or more of PAMA, sodium carboxymethylcellulose, hydroxyethyl cellulose.It is preferred that
Ground, thickening antiwear additive is 0.5~0.7%, anion surfactant is 6.0~8.0%, nonionic surfactant A
It is 1.5~3.0% for 2.0~3.0% and nonionic surfactant B.Wherein, anion surfactant is fatty alcohol polyoxy
The mixture of one or two kinds of compositions of ethene ether sodium sulfate and sodium alkyl sulfate；Or it is AEO sulfuric acid
The one or two of sodium and sodium alkyl sulfate and the mixture of sodium alkyl benzene sulfonate composition.Wherein, the non-ionic surface active
Agent A is AEO, and nonionic surfactant B is APES.
In the present invention, a kind of preparation method of the special sediment improvement agent of sand-pebble layer shield is as follows：Weigh above-mentioned quality
The each component of content, anion surfactant, nonionic surfactant A, nonionic surfactant B and thickening is wear-resistant
Additive is sequentially added in water, and stirring makes it fully dissolve mixing, reacts and produces.
Each embodiment is as shown in table 1：
1 each embodiment of table
The various embodiments described above prepare the special sediment improvement agent of sand-pebble layer shield of gained, and properties are as shown in table 2：
The performance of the special sediment improvement agent of the sand-pebble layer shield of table 2
As shown in Table 2, the special sediment improvement agent of obtained sand-pebble layer shield through shield foam gun can produce stabilization,
Fine and smooth foam, frostproof froth n rate scope is wide, can arbitrarily be adjusted in 10~50 times of scopes as needed, is injected in identical foam
Than under the conditions of, more saved using modifying agent of the present invention；Half-life period 30min~60min is tested under normal pressure, foam stability is good, in slag
The time length to play a role is stabilized in soil, and it is nontoxic, green.
Field test
By the special sediment improvement agent of the sand-pebble layer shield provided in above-described embodiment in Chengdu tunneling boring rich water sand ovum
Stone strata metro project is applied, and the use of the special sediment improvement agent of the sand-pebble layer shield is by shield foam system
System, water and foaming agent stoste are provided according to certain flow proportional by water pump and foam pump, both mix in blending bin, are formed
Foam mixing liquid, foam agent concentration select 1.5~3.0%；The air that foam mixing liquid provides in foam maker with air pump
Fully contact, form foam；Foam flow is set generally according to the 20%~40% of the volume for excavating the soil body, is injected into shield knife
In front of disk, in soil cabin or in conveying worm.Foam is in cutterhead, cutter, cutterhead mixing arm and conveying worm blade
Under strong stirring effect, fine foam uniformly mixes with the dregs excavated, fills the hole in dregs particle, improves the viscous of dregs
Poly- power, workability, sealing, reduce abrasion and energy consumption of the dregs to equipment.
The a diameter of 6.3m of field application shield tunneling, in shield tunneling process, by foaming system according to above method
Modifying agent provided by the invention is injected in front of cutterhead, through statistics, averagely this hair is used per linear meter(lin.m.) when reaching preferable improved effect
Modifying agent 23L~33L of bright offer, being converted into dregs volume, then every cube of dregs uses modifying agent 0.6L~0.9L.To improvement
The mobility and infiltration coefficient of the dregs exported afterwards from conveying worm are tested, and grab dregs by hand and dregs is glued
Foam distribution is observed in poly- property and dregs.The dregs slump is 10.0cm~20.0cm, infiltration coefficient be 1.0 × 10-5~
1.0 × 10-6cm/s dregs is in Plastic Flow state, and the intergranular cohesiveness of dregs is good, and not loosely, not bleeding can in dregs
See that substantial amounts of fine foam is uniformly distributed；Found by observation to shield driving parameter, using modifying agent provided by the invention,
Shield driving is in preferable states：Cutter head torque is low, and gross thrust is small, and driving speed is fast, and shield is slagged tap continuous uniform, is not sprayed
Emerge in large numbers as efficiency of construction is high.The sand-pebble layer shield especially prepared with embodiment 1, embodiment 4, embodiment 6 and embodiment 10
Special sediment improvement agent is best.
The special sediment improvement agent of sand-pebble layer shield that the various embodiments described above provide recommend concentration for 1.5~
3.0%, frothing percentage is 15~30 times, and foam injection ratio 20~60%, design parameter need to be depending on specific soil layer condition.
Contrast test
The well-known homemade goodses of certain being commonly used and imported product have been selected, has been made in the same same stratum of shield structure
With Experimental Comparison statistical result is as shown in table 3：
Table 3 is somebody's turn to do the contrast with like product
As shown in Table 3, the special sediment improvement agent using effect in shield-tunneling construction of sand-pebble layer shield in the present invention
Well, cutter head torque and gross thrust can be significantly reduced, foam consumption is reduced, substantially reduces construction cost, fully meet shield
Tunneling boring sandy gravel or sandy gravel content higher layer sediment improvement requirement.
The special sediment improvement agent of the sand-pebble layer shield is directed to the physicochemical characteristics of sand-pebble layer, the thickening of addition
Abrasion resistant component can improve foam stability, and its backbone can be coupled sandy gravel particle, them is reunited, and thickening is anti-
Mill component can connect sandy gravel particle and foam as tiny silk screen, make overall, can effectively obstruct water
Infiltration, increase cohesiveness, the lubricity of sand pebble soil.The special sediment improvement agent is exclusively used in earth pressure balanced shield, EPBS allusion quotation at home
The construction of molding sand pebble layer, can individually it add and without using polymer and bentonite improved materials.
Claims (2)
1. a kind of special sediment improvement agent of sand-pebble layer shield, it is characterised in that the raw material including following mass content is made：
Thickening antiwear additive 0.2~1.0%, anion surfactant 4.0~10.0%, nonionic surfactant A 1.0~
4.0% and nonionic surfactant B 1.0~4.0%, surplus are water, and quality total amount is 100%；
It is described thickening antiwear additive be PAMA, sodium carboxymethylcellulose, hydroxyethyl cellulose one kind or
The mixture of a variety of compositions；
The anion surfactant is one or two kinds of groups of sodium sulfate of polyethenoxy ether of fatty alcohol and sodium alkyl sulfate
Into mixture；Or one or two and alkyl benzene sulphonate for sodium sulfate of polyethenoxy ether of fatty alcohol and sodium alkyl sulfate
The mixture of sodium composition；
The nonionic surfactant A is AEO, and the nonionic surfactant B is alkyl phenol polyoxy
Vinethene.
A kind of 2. preparation method of the special sediment improvement agent of sand-pebble layer shield as claimed in claim 1, it is characterised in that
This method includes as follows：Weigh each component of above-mentioned mass content, by anion surfactant, nonionic surfactant A,
Nonionic surfactant B and thickening antiwear additive are sequentially added in water, and stirring makes it fully dissolve mixing, reacts and produces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610910641.XA CN106566555B (en) | 2016-10-19 | 2016-10-19 | A kind of special sediment improvement agent of sand-pebble layer shield |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610910641.XA CN106566555B (en) | 2016-10-19 | 2016-10-19 | A kind of special sediment improvement agent of sand-pebble layer shield |
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| Publication Number | Publication Date |
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| CN106566555A CN106566555A (en) | 2017-04-19 |
| CN106566555B true CN106566555B (en) | 2018-03-16 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108192624B (en) * | 2018-01-12 | 2020-07-17 | 中铁第六勘察设计院集团有限公司 | Lubricating foaming agent formula suitable for sandy gravel stratum |
| CN108191311A (en) * | 2018-01-12 | 2018-06-22 | 中铁第六勘察设计院集团有限公司 | A kind of bentonite slurry formula of liquid for rich water sand-pebble layer |
| CN109708987B (en) * | 2019-01-18 | 2021-03-26 | 中交第三航务工程局有限公司南京分公司 | Testing method for soil body abrasiveness coefficient after sandy cobble stratum muck improvement |
| CN110129069B (en) * | 2019-06-10 | 2020-07-21 | 山东宏禹工程科技有限公司 | Muck modifier |
| CN111663948B (en) * | 2020-06-12 | 2021-06-15 | 山东大学 | Water-rich sand-gravel stratum shield muck improvement additive and preparation method thereof |
| CN113637485B (en) * | 2021-09-03 | 2024-02-06 | 宁波交通工程建设集团有限公司 | Polymer liquid soil curing agent and production equipment thereof |
| CN114456812A (en) * | 2022-01-07 | 2022-05-10 | 福州大学 | Method for preparing sandy soil muck modifier by using cohesive soil muck with granite residual soil, muck modifier and using method |
| CN115093181B (en) * | 2022-07-19 | 2023-01-31 | 中建丝路建设投资有限公司 | High-strength baking-free brick based on shield muck in loess region and preparation method thereof |
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Patent Citations (4)
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| US5196060A (en) * | 1988-06-01 | 1993-03-23 | Georges Cazalens | Air-entraining adjuvant containing blood plasma as a substitute for synthetic colloid, and product obtained |
| CN102659445A (en) * | 2012-05-30 | 2012-09-12 | 湖北大学 | Foaming agent for preparation of Water-retaining foam concrete |
| 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 |
| CN103864334A (en) * | 2014-02-12 | 2014-06-18 | 东莞市明洁隧道建设材料有限公司 | Environment-friendly foaming agent for earth pressure balance shield tunneling machine |
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