CN106866056A - A kind of mud for construction of diaphragm wall and preparation method thereof - Google Patents
A kind of mud for construction of diaphragm wall and preparation method thereof Download PDFInfo
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- CN106866056A CN106866056A CN201710216168.XA CN201710216168A CN106866056A CN 106866056 A CN106866056 A CN 106866056A CN 201710216168 A CN201710216168 A CN 201710216168A CN 106866056 A CN106866056 A CN 106866056A
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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
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/10—Mortars, concrete or artificial stone characterised by specific physical values for the viscosity
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
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- Bulkheads Adapted To Foundation Construction (AREA)
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Abstract
The invention discloses a kind of mud for boulder bed construction of diaphragm wall, it is characterised in that the mud includes the raw material of following weight portion：120 130 parts of sodium bentonite, 34 parts of basalt fibre, CMC are 40 50 parts, and appropriate salt solution.It is designed by the component and proportioning to mud, a kind of mud of especially suitable southwest sand pebble layer continuous wall trench underground retaining wall is obtained, its appropriate density, easily precipitate and mudcake thickness is suitable, can be suspended debris, sink rapidly when again debris can be made to be circulated in mud, achieve the technique effect that existing mud is not reached.
Description
Technical field
The present invention relates to construction of diaphragm wall field, more particularly to a kind of mud for boulder bed construction of diaphragm wall
Slurry and preparation method thereof.
Background technology
Diaphram wall excavation technology originates from Europe, and the 1950's this technology is in western developed country and preceding Soviet Union
Connection is promoted, as effective technology in underground engineering and deep foundation.By the development of decades, the technology of diaphram wall
Relative maturity, wherein Japan is the most flourishing in this technology.From water power department of China first in Qingdao pellet rim of the mouth reservoir
Dam cut-pff wall is built with this technology till now, construction of diaphragm wall technique has been obtained for application well in China, main
Will be in areas such as Shanghai, Guangzhou.
In continuous wall trench construction, the stability of cell wall is controlled in addition to strict control work tau-effect, mud off
As main method, and the key of mud off is exactly proportion（Integrated performance index）And mudcake thickness, it is desirable to micel（Mud
It is molecular colloid）It is mud skin to form fine and close skin layer, and the compactness extent and thickness of mud skin are related to the pH value of mud.By
This, the quality of mud concerns the quality of ground-connecting-wall grooving, belongs to one of target of priority control during ground-connecting-wall grooving.
Ground of the performances such as the country, viscosity, proportion, the suspension sediment ability of the existing mud for using both for the area such as Shanghai, Guangzhou
Texture is made and is designed, because underground continuous wall construction technique is not yet popularized in southwest（Such as ground such as Sichuan, Chongqing）, very
To not yet using, the example that not may be referred to, for different geological structures, it is clear that existing mud prescription needs to make tune
It is whole.
Working mud has retaining wall, slag, cooling and the effect of lubrication is taken, however, because existing mud does not have
For the example of sand pebble layer construction, especially for into groove depth depth, construction surrounding enviroment are complicated, level of ground water feelings higher
Condition, does not provide the technical research data of correlation both at home and abroad yet, with the Chengdu station capacity expansion revamping luggage and parcel house work that the applicant undertakes
As a example by journey, the line of state's iron 12 is closed in construction ground, near municipal administration subway Line 1, apart from metro shield minimum distance only 10.4m, influence
Length 28.4m, safe class is one-level, diaphram wall overall length 389m, depth 32m, thickness 1000mm, construction geology situation
Predominantly sand pebble layer, decomposed rock is more than 1m in the insertion of bottom, forms closed ring and safeguards water-stop curtain, closely closes on operation
Both the construction of wired and Chengdu municipal administration subway line be it is domestic first, thus, the performance of mud concerns continuous wall trench construction
Quality, and then concern the success or failure of whole engineering.In consideration of it, designing and developing a kind of suitable southwest sand pebble layer construction
Mud, it will reliably ensured for whole construction work is provided, and fill up the blank existing for China's construction technology.
The content of the invention
Goal of the invention of the invention is：For above-mentioned problem, there is provided a kind of for construction of diaphragm wall
Mud and preparation method thereof so that the mud for retaining wall reaches performance requirement index, and the mud that realization is made is existing to closing on
The diaphram wall of line excavates inwall and carries out shield guarantor.
The technical solution adopted by the present invention is as follows：A kind of mud for boulder bed construction of diaphragm wall, its feature exists
In the mud includes the raw material of following weight portion：Sodium bentonite 120-130 parts, basalt fibre 3-4 parts, CMC be 40-
50 parts, and appropriate salt solution.
In above-mentioned, bentonite is the aqueous clay pit based on montmorillonite, it have bloating tendency, caking property, adsorptivity,
The properties such as catalytic, thixotropy, suspension and cation exchange.Physical chemistry of the sodium bentonite than calcium-base bentonite
Property and process technology performance are superior, are mainly manifested in：Absorption speed is slow, but water absorption rate and expansion multiple are big, cation exchange
Amount is high, and the good dispersion in aqueous medium, colloid index is high；Its soliquid thixotropy, viscosity, lubricity are good, and pH values are high；
Heat endurance is good；There is plasticity and stronger caking property higher；Hot green tensile strength and dry compression are high.And bentonite slurrying energy
Power is stronger, and the mud silt content of manufacture is extremely low（0~0.3%）, i.e. into colloid, do not give up clout for almost all soil particle abrupt change（1t
Bentonite can make 10-15m3 mud）, this is that unselected clay is not accomplished.Bentonitic magma density is small（1.02-1.04g/
cm³）, therefore the debris that can be carried are just more, the sand factor of solid phase can be by 2% lifting to 4%.Based on above-mentioned performance characteristics, the present invention is related to
And construction of diaphragm wall used by mud using sodium bentonite as preferred material.Basalt fibre is used to control in mud
Suspension, can play similar netted effect in mud, greatly improve the suspension debris of mud, and make debris in mud
Sink rapidly during circulation.CMC improves the combination property of mud, salt solution as characteristics such as viscosity, the suspensions for being favorably improved mud
PH value for adjusting mud, so that the PH of mud reaches design requirement, more specifically, the salt in the salt solution is sodium salt,
Including NaCl salt solution.
The main performance of mud has mud density, viscosity, gel strength, sand factor, colloidity, percentage of water loss, acid-base value and modeling
Sex index etc..The performance indications of mud are the important technical index of trenching construction, the direct shadow of change of each performance indications
The a series of pore-forming technique problem, direct shadow such as purification and prevention drilling accident are rung in mechanical grooving speed, slurry trench stability, groove
Cell body size, perpendicularity, mudcake thickness and bottom land sediment thickness etc. are rung, it is especially more notable to elongated slot section construction infection.It is abundant
The effect of mud is played, the selection of its performance indications is extremely important.
Accordingly, as preferred, raw material of the mud including following weight portion：124.3 parts of sodium bentonite, basalt are fine
3.46 parts of dimension, CMC are 47.66 parts and 1000 parts of salt solution, and the performance indications of the mud obtained according to this proportional arrangement are as follows：Half
From the ground after static 24h, density 1.12g/cm3, viscosity 28s, sand factor are ＜ 4%, the mm/min of mudcake thickness 2.21, stabilization
Property be≤0.02g/cm3, colloidity ＞ 98% and pH value are 10, and the mud under the index is particularly suitable as boulder bed underground
The slurry coat method of construction of diaphragm wall, it can carry out shield guarantor to closing on both wired diaphram wall excavation inwall.
Further, added with dispersant in mud, the dispersant is soda ash, and the volume of dispersant is generally 0-0.5%（% tables
Show mud total mass fraction）, the grooving in the sandy gravel stratum of rich groundwater is good to enable mud to be formed sometimes without dispersant
Good mud skin and when filling dispersant, for the reduction of mud viscosity, can be adjusted with the volume for increasing sodium bentonite or CMC
Section, in addition, the relative density to improve mud, increases it and safeguard slurry trench stability ability, can also fill heavy weight additive in mud.
Further, also mixed with leak preventive in mud, the volume of the leak preventive is the 0.5-5% of mud gross mass.As for anti-
Leak agent volume, at the beginning prepare mud when determine that, typically the leakage situation according to mud during grooving and
Gradually fill, the general volume of leak preventive is 0.5%-1.0%, in case of leakage is very big, volume may increase to 5%, or different are prevented
Leakage agent is used in mixed way.
Explanation to mud main performance index：
Density, the density of mud is the weight ratio of the weight with prescribed volume water of mud, and specific gravity of mud is bigger, to cell wall
Pressure it is also bigger, cell wall is also more firm, but as specific gravity of mud it is excessive, the water in mud oozes mistake because of compression to be increased, and is made
The mud skin being attached on cell wall is thickened and loose, unfavorable Gu Bi；Also influence concrete pouring quality simultaneously；And due to mobility
Differ from and increase the power consumption of mud recycle unit.Accordingly, for the environment of construction of diaphragm wall involved in the present invention,
The relative density for designing mud is 1.05-1.25.
Viscosity, viscosity is big, the native slag that suspends, drilling cuttings ability it is strong, but the resistance excavated to grooving is big, the mud skin of production
It is thick；Viscosity is small, the native slag that suspends, drilling cuttings ability it is weak, prevent that mud from missing and quicksand is unfavorable.
Sand content, sand content is big, relative density increase, viscosity reduction, and suspend native slag, the reduced capability of drilling cuttings, native slag etc.
Easily sink bottom land, increases the abrasion of machinery.
Fluid loss and mudcake thickness, fluid loss represent the performance that mud dries out in the earth formation, in slurry penetration dehydration
While, wherein the particle that can not pass through soil layer just sticks to formation mud skin on cell wall, mud skin can be prevented or reduced again in turn
The leakage of moisture in mud, thin and closely knit mud skin is conducive to cell wall firm and grooving equipment（Drilling tool, pawl bucket）Lifting, it is thick
And loose mud skin, it is unfavorable that cell wall is consolidated, and also forming the bod makes grooving equipment not smooth.
Stability, bentonite slurry is in alkalescent, and pH value is generally 7-9, and the mud of pH value ＞ 11 can produce lamination, is lost
Retaining wall is gone to act on.
The preparation method of the mud for boulder bed construction of diaphragm wall of the invention is comprised the following steps：
Step 1, investigate preparing surrounding environment and condition before mud, it is determined that suitable slurrying environment；
Step 2, the viscosity according to needed for slurry trench stability determine the volume of sodium bentonite, basalt fibre and CMC, according to applying
Work situation, from dispersant and determines its volume as one sees fit, in addition, the leakage situation according to mud during grooving determines to mix leakage agent
Volume；
Step 3, by water and sodium bentonite mixing and stirring, obtain bentonite slurry, by bentonite slurry stand 24h with
Afterwards, basalt fibre, CMC, dispersant and leak preventive are added according to the volume for determining, after being uniformly mixed, is added appropriate
Salt solution regulation pH value is 10.
In sum, by adopting the above-described technical solution, the beneficial effects of the invention are as follows：
1st, it is designed by the component and proportioning to mud, has obtained a kind of being used for for suitable southwest sand pebble layer construction
The mud of continuous wall trench underground retaining wall, properly, can suspend debris, and energy for its appropriate density, easily precipitation and mudcake thickness
Sink rapidly when debris is circulated in mud；
2nd, mud easy construction of the invention, and reduce adverse effect of the mud to strength performance；
3rd, through design studies and field observation, it is determined that be particularly suitable as the slurry coat method of boulder bed construction of diaphragm wall
Optimum proportioning amount and index parameter, the mud obtained under the proportional quantity and index parameter can be to closing on both wired underground
Diaphragm wall excavates inwall and carries out shield guarantor, and this is the technique effect that existing mud is not reached.
Specific embodiment
With reference to embodiment, the present invention is described in detail.
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
A kind of preparation method of mud for boulder bed construction of diaphragm wall, it is comprised the following steps：
Step 1, the preparation before mud is prepared, before preparing mud, foundation soil, underground water and execution conditions etc. need to be adjusted
Look into；For soil investigation, including soil layer distribution and the species of soil property；Whether there is collapse resistant larger soil layer；There are free from flaw, sky
Hole, water penetration are easy to produce greatly the soil layer of spillage；Whether there is organic matter soil layer etc.；For the investigation of underground water, it will be appreciated that underground water
Can position and its situation of change, ensure that mud liquid level is higher by more than level of ground water 1m；Understand water table aquifer, artesian aquifer distribution and ground
Lower water flow velocity；Determine the content of the harmful ion such as salinity and calcium ion in underground water；The draining that understanding whether there is chemical plant is flowed into；Survey
Determine the pH value of underground water；For the investigation of execution conditions, it will be appreciated that groove depth and groove width；Largest unit groove segment length is vacant with possible
Time；It is adapted to trench machine and the grooving method for using；Mud round-robin method, the possibility of mud conditioning, can be in short-term
Interior a large amount of mud of supply etc.；
Step 2, the viscosity according to needed for slurry trench stability determine the volume of sodium bentonite, basalt fibre and CMC, according to applying
Work situation, from dispersant and determines its volume as one sees fit, in addition, the leakage situation according to mud during grooving determines to mix leakage agent
Volume；When determining mud match ratio, mixing for sodium bentonite is determined according to the viscosity for needed for keeping slurry trench stability first
Amount, the volume of basalt fibre, the volume of tackifier CMC；For dispersant, the grooving in the sandy gravel stratum of rich groundwater has
Shi Buyong dispersants, when filling dispersant to enable mud to form good mud skin, for the reduction of mud viscosity, can use increasing
Plus the volume of bentonite or CMC is adjusted；As for the volume of leak preventive, leakage situation according to mud during grooving and gradually
Admixture；
Step 3, by water and sodium bentonite revolution at a high speed formula mixer mixing and stirring, obtain bentonite slurry, will be swollen
After the native mud standing 24h sodium bentonites of profit are swelling, basalt fibre, CMC, dispersant and leakproof are added according to the volume for determining
Agent, after being uniformly mixed, it is 10 to add appropriate salt solution regulation pH value.
It is worth mentioning that, it is preferably abundant in mud in order to give full play to effect of the mud in construction of diaphragm wall
Reused after swelling, more than 3h is preferably stored after all mud stirrings.Storage mud preferably uses the circulating tank of steel or underground, semi-underground
The need for formula reserve pit, its volume should adapt to construction, such as with the horizontal circulating tank of vertical storage tank or liftoff certain altitude, then can oneself
Streaming slurry mends slurry, without using pumping, such as uses underground or semi-underground type reserve pit, to prevent the surface water and underground water from flowing into pond
It is interior.
Meanwhile, in treatment, during construction of diaphragm wall, mud will be with underground water, sand, soil, concrete for mud
The compositions such as contact, bentonite, admixture can have been consumed, and be mixed into native slag and electrolyte ion etc., receive mud
The deterioration to pollution.The mud of rear property deterioration is contaminated, it is still reusable after treatment, it is difficult to Ru seriously polluted
Uneconomical person is processed or processes then to give up.
By mud obtained in the above method, the formulation parameter of its determination is as shown in the table（Numeral represents weight portion）：
It is the quality of the obtained mud of detection, to determine stability, suitable mobility that it possesses physics and chemistry, good
Mud skin Forming ability and appropriate relative density, the mud to being obtained by above-mentioned preparation method carry out matter using instrumentation
Amount detection, Testing index is as follows：
（1）Relative density, density claims to determine；
（2）Viscosity, funnel viscometer or V-G meter are determined；
（3）Sand content, ZNH types mud sand content meter is determined；
（4）Mudcake thickness, fluid loss instrument is determined；
（5）PH value, the colorimetric method or acidometer of litmus paper are determined；
（6）Stability, relative density difference experiment determines, will mud stand 24h, by after precipitation, determine the relative of upper and lower layer
Density contrast；
（7）Colloidity, after mud is stood into 24h, it is in the degree that is separated from water of solid particle of suspended state, that is, determine mud
The ratio between partial volume and cumulative volume.
Through test, by mud obtained above partly from the ground after static 24h, its density reaches 1.05-1.25g/
cm2, viscosity reaches 20-28S, sand factor ＜ 4%, and mudcake thickness reaches 1-3mm/min, stability≤0.02g/cm2, colloidity ＞
98%, pH value reaches 10.Wherein, when raw material proportioning relation is：124.3 parts of sodium bentonite, 3.46 parts of basalt fibre, CMC are
47.66 parts and during 1000 parts of salt solution, the performance indications of obtained mud are as follows：Partly from the ground after static 24h, density
1.12g/cm3, viscosity 28s, sand factor are ＜ 4%, and the mm/min of mudcake thickness 2.21, stability is≤0.02g/cm3, colloidity
＞ 98% and pH value are 10, and the mud under the index is particularly suitable as the slurry coat method of boulder bed construction of diaphragm wall,
Shield guarantor can be carried out to closing on both wired diaphram wall excavation inwall.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (5)
1. a kind of mud for boulder bed construction of diaphragm wall, it is characterised in that the mud includes following weight portion
Raw material：Sodium bentonite 120-130 parts, basalt fibre 3-4 parts, CMC be 40-50 parts, and appropriate salt solution.
2. the mud of boulder bed construction of diaphragm wall is used for as claimed in claim 1, it is characterised in that the mud includes
The raw material of following weight portion：124.3 parts of sodium bentonite, 3.46 parts of basalt fibre, CMC are 47.66 parts and 1000 parts of salt solution.
3. the mud of boulder bed construction of diaphragm wall is used for as claimed in claim 1 or 2, it is characterised in that the salt solution
In salt be sodium salt, added with dispersant in mud, the dispersant be soda ash.
4. the mud for boulder bed construction of diaphragm wall as described in claim 1 or 2 or 3, it is characterised in that in mud
Also mixed with leak preventive, the volume of the leak preventive is the 0.5-5% of mud gross mass.
5. the mud of boulder bed construction of diaphragm wall is used for as claimed in claim 4, it is characterised in that the system of the mud
Preparation Method is comprised the following steps：
Step 1, investigate preparing surrounding environment and condition before mud, it is determined that suitable slurrying environment；
Step 2, the viscosity according to needed for slurry trench stability determine the volume of sodium bentonite, basalt fibre and CMC, according to applying
Work situation, from dispersant and determines its volume as one sees fit, in addition, the leakage situation according to mud during grooving determines to mix leakage agent
Volume；
Step 3, by water and sodium bentonite mixing and stirring, obtain bentonite slurry, by bentonite slurry stand 24h with
Afterwards, basalt fibre, CMC, dispersant and leak preventive are added according to the volume for determining, after being uniformly mixed, is added appropriate
Salt solution regulation pH value is 10.
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| CN201710216168.XA CN106866056B (en) | 2017-04-05 | 2017-04-05 | A kind of mud and preparation method thereof for construction of diaphragm wall |
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| CN201710216168.XA CN106866056B (en) | 2017-04-05 | 2017-04-05 | A kind of mud and preparation method thereof for construction of diaphragm wall |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109403337A (en) * | 2018-10-12 | 2019-03-01 | 江苏省送变电有限公司 | A kind of basalt fibre reinforcement TRD engineering method diaphram wall and its construction method |
| CN111763040A (en) * | 2020-05-28 | 2020-10-13 | 浙江土工岩土科技有限公司 | Slurry for underground diaphragm wall near river and sea |
| CN111844358A (en) * | 2020-06-12 | 2020-10-30 | 上海市基础工程集团有限公司 | Method for manufacturing cement test block in cement continuous wall construction |
| CN112707692A (en) * | 2021-01-06 | 2021-04-27 | 上海智平基础工程有限公司 | Cutting fluid for TRD construction, preparation method and construction method |
| CN116768594A (en) * | 2023-06-27 | 2023-09-19 | 中铁一局集团(广州)建设工程有限公司 | Prefabricated diaphragm wall combined self-setting slurry and preparation method thereof |
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| CN105178288A (en) * | 2015-07-31 | 2015-12-23 | 中铁隧道集团有限公司 | Construction method of underground continuous wall below viaduct |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109403337A (en) * | 2018-10-12 | 2019-03-01 | 江苏省送变电有限公司 | A kind of basalt fibre reinforcement TRD engineering method diaphram wall and its construction method |
| CN111763040A (en) * | 2020-05-28 | 2020-10-13 | 浙江土工岩土科技有限公司 | Slurry for underground diaphragm wall near river and sea |
| CN111844358A (en) * | 2020-06-12 | 2020-10-30 | 上海市基础工程集团有限公司 | Method for manufacturing cement test block in cement continuous wall construction |
| CN112707692A (en) * | 2021-01-06 | 2021-04-27 | 上海智平基础工程有限公司 | Cutting fluid for TRD construction, preparation method and construction method |
| CN116768594A (en) * | 2023-06-27 | 2023-09-19 | 中铁一局集团(广州)建设工程有限公司 | Prefabricated diaphragm wall combined self-setting slurry and preparation method thereof |
| CN116768594B (en) * | 2023-06-27 | 2024-02-02 | 中铁一局集团(广州)建设工程有限公司 | Prefabricated diaphragm wall combined self-setting slurry and preparation method thereof |
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| CN106866056B (en) | 2019-04-23 |
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