CN109133737A - A kind of salt resistance mud and preparation method thereof being adapted to seabed shield-tunneling construction - Google Patents
A kind of salt resistance mud and preparation method thereof being adapted to seabed shield-tunneling construction Download PDFInfo
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- CN109133737A CN109133737A CN201810962292.5A CN201810962292A CN109133737A CN 109133737 A CN109133737 A CN 109133737A CN 201810962292 A CN201810962292 A CN 201810962292A CN 109133737 A CN109133737 A CN 109133737A
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- salt resistance
- mud
- xanthan gum
- resistance mud
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Classifications
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- 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
- C04B28/001—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 containing unburned clay
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/38—Polysaccharides or derivatives thereof
-
- 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
- C04B2111/74—Underwater applications
Abstract
The invention belongs to construction engineering technical fields, disclose a kind of salt resistance mud and preparation method thereof for being adapted to seabed shield-tunneling construction, the salt resistance mud is made of 100 parts of water, 6~10 parts of bentonites and 0.1~0.3 part of xanthan gum by weight, preparation method is first to stir evenly bentonite and water to be configured to slurries, xanthan gum is added again, is stirred while adding；Or aqueous solution is uniformly first configured by xanthan gum and water, then add bentonite, it stirs while adding；Salt resistance mud slurries are obtained after raw material mixing to stir under certain speed conditions；Certain time is stood at room temperature after the completion of stirring.Salt resistance mud prepared by the present invention has good rheological characteristic and low filtration loss, and salt resistance effect is good and from a wealth of sources, economic and practical, environmentally protective.
Description
Technical field
The invention belongs to construction engineering technical fields, and in particular to a kind of salt resistance mud and preparation method thereof.
Background technique
In recent years, coastal nuclear power station water discharge tunnel, cross-river tunnel engineering over strait are fast-developing.Slurry shield construction method because
The advantages that its work efficiency is high, reliable and secure, technology is excellent is increasingly becoming the main method in the construction of coastal cities Tunnel Engineering[1,2]。
When slurry shield is constructed, mud permeates under lock pressure effect into stratum, forms one layer of fine and close mud membrane equilibrium Tu Shui in excavation face
Pressure plays the important function for maintaining face stable[3].The simulated mud on good mud property and suitable stratum determines
The drivage efficiency and economic cost of slurry shield, proportion design have a very important role for construction safety and progress.
But widely used slurry shield construction method subsea strata construction in there is also some inevitable problems, with regard to mud
For slurry design: when shield driving encounters high stratum containing inorganic salts or when rich in stratum under briny environment, exists in seawater big
Measure Cl-Ion and some cation (such as Ca2+、Mg2+) mud can be polluted, make it that coalescence easily occur and sink, mud is caused to form a film
Functional deterioration, filter loss and rheological property deterioration[4], seriously affect construction quality and progress.
Dispersion mud system selected by domestic and international slurry shield engineering is mostly by clay, bentonite, water, additive at present
It is constituted, improves the performance of slurry using additive (mainly polymer) in some cases[5].For seawater mixing
Mud mostly uses salt resistance bentonite or adds salt resistant filter loss reduction agent in mud, and common salt resistant filter loss reduction agent has CMC[6], gather
Acrylamide[7]Deng.But for these salt resistant filter loss reduction agents mostly by various organic synthesis, chemical technology is more complicated, and salt resistance effect
General only 20% or so.In addition, the mud waste pulp amount that conventional method is prepared is big, and the high molecular polymer in additive is very
Difficult to degrade, environmental pollution is serious[8]。
Therefore, research is from a wealth of sources, filtrate reducing effect is good, saline-alkaline tolerance is strong, economic and practical and environmentally protective mud exists
There is very important engineering significance in the shield-tunneling construction of seabed.
Bibliography:
[1]Shen,S.L.,Dai,Y.Z.,Liu,J.H.,Chai,J.C.,Construction of slurry
shield tunnel under Huangpu River in Shanghai.Tunn.Undergr.Sp.Tech.2004,19
(4):397-398.
[2] Chen Chen subway tunnel slurry balance shield bad ground Slurry confection technology over strait analyzes [J] Building technology
Exploitation, 2017, (03): 88-90.
[3]Min F,Zhu W,Han X.Filter cake formation for slurry shield
tunneling in highly permeable sand[J].Tunneling and Underground Space
Technology Incorporating Trenchless Technology Research,2013,38(3):423-430.
[4] development [J] mineral exploration engineering (the rock and soil drilling work of Hu Jianping, Dong Jiaoshe, Feng Beilei polymer seawater mud
Journey), 2012,39 (12): 29-31.
[5]Fritz P.Additives for Slurry Shields in Highly Permeable Ground
[J].Rock Mechanics&Rock Engineering,2007,40(1):81-95.
[6] Chi Xiuwen, Yao Zhiwei, woods speed thick sand bed drilling pouring pile hole simulated mud analysis [J] Wuhan University learn
It reports (engineering version), 2012,45 (04): 477-480.
[7] Tan Wenli, seat square column, king's Chong wait a kind of anti-salt high-density cement mortar of: China, 200710118273.6 [P]
.2009-01-07.
[8] a kind of special slurry shield of Zhang Zixin, Hu Xinyu, Huang Xin tunnels green mud test research [J] Tongji University
College journal (natural science edition), 2010,38 (11): 1574-1578.
Summary of the invention
The present invention deteriorates slip for seabed shield briny environment, and conventional additive salt resistance effect is general, dirty
The disadvantages of contaminating environment, proposes a kind of salt resistance mud and preparation method thereof for being adapted to seabed shield-tunneling construction, with good stream
Denaturation and low filtration loss, salt resistance effect is good and from a wealth of sources, economic and practical, environmentally protective.
In order to solve the above-mentioned technical problem, the present invention is achieved by technical solution below:
A kind of salt resistance mud being adapted to seabed shield-tunneling construction, composed of the following components by weight:
100 parts of water
6~10 parts of bentonite
0.1~0.3 part of xanthan gum
Further, the bentonite is sodium bentonite.
Further, under 10% sea conditions working environment, the xanthan gum is 0.1 part.
Further, under 30% sea conditions working environment, the xanthan gum is 0.24 part.
Further, under 100% sea conditions working environment, the xanthan gum is 0.3 part.
A kind of preparation method of the salt resistance mud being adapted to seabed shield-tunneling construction, sequentially includes the following steps:
(1) bentonite and water are weighed by weight, and is stirred evenly, and mud slurries are configured to；
(2) in the configured mud slurries of step (1), xanthan gum is added according to parts by weight, is stirred while adding；
(3) the salt resistance mud slurries for obtaining step (2) stir no less than 30min at 800~1200r/min；
(4) after the completion of stirring, salt resistance mud slurries stand 24~36h at room temperature.
A kind of preparation method of the salt resistance mud being adapted to seabed shield-tunneling construction, sequentially includes the following steps:
(1) xanthan gum and water are weighed by weight, and is stirred evenly, and xanthan gum solution is configured to；
(2) in step (1) configured xanthan gum solution, bentonite is added according to parts by weight, is stirred while adding；
(3) the salt resistance mud slurries for obtaining step (2) stir no less than 30min at 800~1200r/min；
(4) after the completion of stirring, salt resistance mud slurries stand 24~36h at room temperature.
The cementing additives of salt resistance mud of the invention are as follows:
Glucuronic acid group on xanthan molecules side chain has a negative electrical charge, bentonite molecular surface due to hydration sun from
Son presence and have positive charge, in bentonite solution be added xanthan gum after, xanthan molecules be gradually attracted be integrated to it is swollen
Moisten native surrounding molecules, forms the protective effect of a kind of pair of bentonite clay particle.And because xanthan molecules side chain is with negative electrical charge
Reason, under the action of hydrogen bond, electrostatic force, a large amount of Ca present in sea water solution2+、Mg2+Equal cations can be gradually by xanthan
The absorption of xanthan molecule side chain combines.These replacements of the cation to exchangeable cations in bentonite, drop are on the one hand prevented in this way
Low effects of ion concentration difference, protects the fundamental property of sodium bentonite constant；On the other hand since the aquation of cation is made
With, one layer of thicker hydrated sheath of formation around bentonite, while also reducing Cl-The compression of ion pair diffusion electric double layer is made
With.
The beneficial effects of the present invention are:
The present invention is used as salt resistance additive using xanthan gum, produce the primary raw material of xanthan gum for corn and soybean, cassava,
The plants such as wheat, price is more cheap, and no pollution to the environment；The salt resistance mud can quickly dissolve in aqueous solution, have non-
Often good water solubility, can dissolve in cold water, can avoid many and diverse process, easy to use；Salt resistance mud tool
There is preferable salt resistance stability, has good improvement result to drilling fluid rheology energy and water-retaining property in briny environment, in certain salt
Under concentration conditions, which can mix with a variety of salting liquids, mainly calcium salt, magnesium salts and sodium salt, keep the molten of itself
Without flocculating or precipitating, viscosity is substantially unaffected solution property；The salt resistance mud has some insoluble solids and oil droplet
There is good suspension effect, is capable of forming between xanthan molecules in conjunction with band-like spiral copolymer, constitutes reticular structure, therefore
It configures mud suspension and takes that slag ability is stronger, is conducive to the discharge of dregs.
Detailed description of the invention
Fig. 1 is the variation of the viscosity and specific gravity under the conditions of the blending of different proportion seawater of salt resistance mud obtained by embodiment 1
Curve graph；
Fig. 2 is the variation song of viscosity and specific gravity under the conditions of the blending of salt resistance mud different proportion seawater obtained by embodiment 2
Line chart；
Fig. 3 is the variation song of viscosity and specific gravity under the conditions of the blending of salt resistance mud different proportion seawater obtained by embodiment 3
Line chart；
Fig. 4 be salt resistance mud obtained by embodiment 3 under the conditions of 100% seawater blends in medium coarse sand stratum fluid loss with
Time variation diagram；
Fig. 5 is the super quiet hole in medium coarse sand stratum under the conditions of 100% seawater blends of salt resistance mud obtained by embodiment 3
Hydraulic pressure changes over time figure.
Specific embodiment
Below by specific embodiment, the present invention is described in further detail:
Following embodiment can make those skilled in the art that the present invention be more completely understood, but not limit this in any way
Invention.
It is described as follows for raw materials used in various embodiments of the present invention:
Water: tap water；
Bentonite: the sodium bentonite of klippe producer production；
Xanthan gum: the xanthan gum of Hebei Run Bu biotechnology company production.
Embodiment 1:
Preparing a kind of salt resistance mud for being adapted to seabed shield-tunneling construction, raw material is 100 parts of water, 6 parts of bentonite, xanthan gum
It 0.1 part, sequentially includes the following steps:
A, bentonite is weighed by weight and water stirs evenly；
B, the xanthan gum for weighing 0.1 part is added it in the slurries obtained by a step, is stirred while adding；
C, the slurries obtained by b step are stirred into 30min at 1000r/min with electric mixer；
D, it stands and stores for 24 hours at room temperature.
The salt resistance mud testing result that embodiment 1 is prepared is as follows:
(1) provide that measuring its apparent viscosity is 21.9s, filter loss 16ml according to GB/T16783.1 standard；Test knot
Fruit shows its apparent viscosity and filter loss is all satisfied requirements of the national standard and construction experience range.
(2) as shown in Figure 1, measured under the conditions of corresponding 10%, 20%, 30% seawater blending respectively its apparent viscosity and
Filter loss are as follows: 21.84s, 15.4ml；17.66s 18.2ml；16.11s 19.1ml.As seawater content increases, mud viscosity
It is gradually reduced, filter loss increases, and according to slurry shield case history experience, filter loss is less than 20ml and meets the requirements, and corresponds to
Its apparent viscosity remains unchanged substantially under 10% sea conditions, i.e. 10% sea conditions are the building ring for being suitble to the salt resistance mud
Border.
Embodiment 2:
Preparing a kind of salt resistance mud for being adapted to seabed shield-tunneling construction, raw material is 100 parts of water, 8 parts of bentonite, xanthan gum
It 0.24 part, sequentially includes the following steps:
A, xanthan gum being weighed by weight and water stirring evenly, the xanthan gum solution that mass percent is 0.24% is made；
B, bentonite is weighed by weight, is added it in the xanthan gum solution obtained by a step, is stirred when being added
It mixes；
C, the slurries obtained by b step are stirred into 30min at 1200r/min with electric mixer；
D, 32h storage is stood at room temperature.
The salt resistance mud testing result that embodiment 2 is prepared is as follows:
(1) provide that measuring its apparent viscosity is 22.3s, filter loss 15.4ml according to GB/T16783.1 standard；Test
The result shows that apparent viscosity and filter loss are all satisfied requirements of the national standard and construction experience range.
(2) as shown in Fig. 2, measured under the conditions of corresponding 10%, 20%, 30% seawater blending respectively its apparent viscosity and
Filter loss are as follows: 33s, 14ml；25.2s 16.9ml；21.2s 17.1ml.With seawater content increase, mud viscosity gradually under
Drop, filter loss increase, and filter loss is respectively less than 20ml and meets the requirements, and under corresponding 30% sea conditions its apparent viscosity with not by sea
Close when water pollution, i.e. 30% sea conditions are the working environment for being suitble to the salt resistance mud.
Embodiment 3:
Preparing a kind of salt resistance mud for being adapted to seabed shield-tunneling construction, raw material is 100 parts of water, 10 parts of bentonite, xanthan gum
It 0.3 part, sequentially includes the following steps:
A, xanthan gum being weighed by weight and water stirring evenly, the xanthan gum solution that mass percent is 0.3% is made；
B, bentonite is weighed by weight, is added it in the xanthan gum solution obtained by a step, is stirred when being added
It mixes；
C, the slurries obtained by b step are stirred into 30min at 800r/min with electric mixer；
D, 36h storage is stood at room temperature.
The salt resistance mud testing result that embodiment 3 is prepared is as follows:
(1) first measuring its apparent viscosity according to GB/T16783.1 standard regulation is 25s, filter loss 15.4ml；Test
The result shows that apparent viscosity and filter loss are all satisfied requirements of the national standard and construction experience range；
(2) as shown in figure 3, measuring it apparently under the conditions of corresponding 10%, 20%, 30%, 100% seawater blending respectively
Viscosity and filter loss are as follows: 36.5s, 13ml；30.55s 13.8ml；26.12s 16.2ml；24.94s 16.6ml.With seawater
Content increases, and mud viscosity is gradually reduced, and filter loss increases, and filter loss is respectively less than 20ml, and under corresponding 100% sea conditions its
Apparent viscosity with not by seawater pollution when it is closest, i.e. 100% sea conditions are the working environment for being suitble to the salt resistance mud；
(3) it uses and is existed by the permeability apparatus that pressure control, slurry penetration bucket, part of data acquisition and connecting pipe form
Slurry penetration adaptability is tested in 100% briny environment.Slurry penetration apparatus main body be a headroom be 270 × 680 (internal diameter ×
Interior height: mm), the Plexiglas cylinder that wall thickness is 15mm forms.The installation of permeability apparatus Organic glass column side wall different location is high
Accuracy pressure sensor tests formation pore water pressure, and earth formation material used is mainly that medium coarse sand comes from marine drill hole sampling, ginseng
It carries out constant head test to measure the infiltration coefficient of the medium coarse sand being 7.8 × 10 according to earthwork test rule-3Cm/s considers practice of construction
The maximum value of mud pressure and ground water pressure, this test mud pressure is 0.3MPa.Experiment is collected primary every 10s after starting
Stratum difference depths pore water pressure force value and accumulative seepage flow magnitude.
From the point of view of test result Fig. 4 and Fig. 5,100% briny environment adds the mud of 0.3 part of xanthan gum preparation in medium coarse sand
Stratum osmotic effect is good, is capable of forming good mud film form.It is 1.063g/cm using specific gravity3, viscosity be 24.94s mud
The mud film thickness that slurry carries out permeability test formation is about 2mm, and infiltering medium coarse sand stratum is about 40mm.Finally filter loss is about
900ml, infiltration deadline are 20s.Stratum excess pore water pressure is also maintained at a lower level at different depth, leans on
Excess pore water pressure in the stratum on nearly top is about 0.045MPa, and understratum numerical value is smaller, is 0.025-0.03MPa.
Illustrate to test mud can effective silting formation pore, keep out Water And Earth Pressures, keep the stabilization of face.
Although the preferred embodiment of the present invention is described above in conjunction with attached drawing, the invention is not limited to upper
The specific embodiment stated, the above mentioned embodiment is only schematical, be not it is restrictive, this field it is common
Technical staff under the inspiration of the present invention, can be with when not departing from invention objective and scope of the claimed protection
The specific transformation of many forms is made, within these are all belonged to the scope of protection of the present invention.
Claims (7)
1. a kind of salt resistance mud for being adapted to seabed shield-tunneling construction, which is characterized in that composed of the following components by weight:
100 parts of water
6~10 parts of bentonite
0.1~0.3 part of xanthan gum.
2. a kind of salt resistance mud and preparation method thereof for being adapted to seabed shield-tunneling construction according to claim 1, feature
It is, the bentonite is sodium bentonite.
3. a kind of salt resistance mud and preparation method thereof for being adapted to seabed shield-tunneling construction according to claim 1 or 2, special
Sign is, under 10% sea conditions working environment, the xanthan gum is 0.1 part.
4. a kind of salt resistance mud and preparation method thereof for being adapted to seabed shield-tunneling construction according to claim 1 or 2, special
Sign is, under 30% sea conditions working environment, the xanthan gum is 0.24 part.
5. a kind of salt resistance mud and preparation method thereof for being adapted to seabed shield-tunneling construction according to claim 1 or 2, special
Sign is, under 100% sea conditions working environment, the xanthan gum is 0.3 part.
6. a kind of preparation method for the salt resistance mud that seabed shield-tunneling construction is adapted to as described in any one of claim 1-5,
It is characterized in that, sequentially includes the following steps:
(1) bentonite and water are weighed by weight, and is stirred evenly, and mud slurries are configured to；
(2) in the configured mud slurries of step (1), xanthan gum is added according to parts by weight, is stirred while adding；
(3) the salt resistance mud slurries for obtaining step (2) stir no less than 30min at 800~1200r/min；
(4) after the completion of stirring, salt resistance mud slurries stand 24~36h at room temperature.
7. a kind of preparation method for the salt resistance mud that seabed shield-tunneling construction is adapted to as described in any one of claim 1-5,
It is characterized in that, sequentially includes the following steps:
(1) xanthan gum and water are weighed by weight, and is stirred evenly, and xanthan gum solution is configured to；
(2) in step (1) configured xanthan gum solution, bentonite is added according to parts by weight, is stirred while adding；
(3) the salt resistance mud slurries for obtaining step (2) stir no less than 30min at 800~1200r/min；
(4) after the completion of stirring, salt resistance mud slurries stand 24~36h at room temperature.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111690384A (en) * | 2020-07-18 | 2020-09-22 | 湖南飞来峰非金属矿物材料有限公司 | Production method of salt-resistant bentonite |
| CN112110682A (en) * | 2020-08-10 | 2020-12-22 | 中交武汉港湾工程设计研究院有限公司 | High-efficiency plugging film-forming shield slurry material for emergency |
| CN112538340A (en) * | 2020-12-02 | 2021-03-23 | 中铁隧道股份有限公司 | Shield slurry preparing process |
| 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 |
| CN115960588A (en) * | 2022-11-07 | 2023-04-14 | 山东大学 | Environment-friendly slurry prepared from seawater and used for seabed slurry shield tunnel |
| CN116355601A (en) * | 2023-02-27 | 2023-06-30 | 桂林理工大学 | Sand pebble large-aperture stratum wall protection slurry and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111690384A (en) * | 2020-07-18 | 2020-09-22 | 湖南飞来峰非金属矿物材料有限公司 | Production method of salt-resistant bentonite |
| CN112110682A (en) * | 2020-08-10 | 2020-12-22 | 中交武汉港湾工程设计研究院有限公司 | High-efficiency plugging film-forming shield slurry material for emergency |
| CN112538340A (en) * | 2020-12-02 | 2021-03-23 | 中铁隧道股份有限公司 | Shield slurry preparing process |
| 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 |
| CN115960588A (en) * | 2022-11-07 | 2023-04-14 | 山东大学 | Environment-friendly slurry prepared from seawater and used for seabed slurry shield tunnel |
| CN116355601A (en) * | 2023-02-27 | 2023-06-30 | 桂林理工大学 | Sand pebble large-aperture stratum wall protection slurry and preparation method thereof |
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Application publication date: 20190104 |