CN110054455A - Antiseepage is shut off underground curtain wall fly ash base impervious material and construction method - Google Patents
Antiseepage is shut off underground curtain wall fly ash base impervious material and construction method Download PDFInfo
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- CN110054455A CN110054455A CN201910331989.7A CN201910331989A CN110054455A CN 110054455 A CN110054455 A CN 110054455A CN 201910331989 A CN201910331989 A CN 201910331989A CN 110054455 A CN110054455 A CN 110054455A
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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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/08—Slag cements
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
- E02D19/185—Joints between sheets constituting the sealing aprons
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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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
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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Abstract
The present invention provides a kind of antiseepage and shuts off underground curtain wall fly ash base impervious material and construction method, which is not necessarily to sand, stone, and can utilize power plant waste flyash, can reduce the destruction of solid waste discharge and reduction to environment, environmentally protective；It pours to form underground curtain wall using the impervious material, has easy for construction, casting craft process is simple, is formed by that diaphram wall is adaptable, barrier properties are good.Antiseepage provided by the invention is shut off underground curtain wall fly ash base impervious material, including following weight item: 40 parts of cement, 50-70 parts of flyash, 5-10 parts of silicon ash, 2-4 parts of bentonite, 2-3 parts of sodium chloride, 1.5-3 parts of calcium lignosulfonate and 60-70 parts of water.
Description
Technical field
The present invention relates to open coal mine, metal mine and well industrial and mineral antiseepage stopped flow technique field more particularly to a kind of dew
Its mine antiseepage is shut off underground curtain wall fly ash base impervious material.
Background technique
Currently, mine waterproof of man mainly has grouting curtain, water seal curtain stake and diaphram wall.Grouting curtain construction party
Just, process flow is simple, but there are slip casting Seed harvests it is discontinuous, water-stagnating effect is undesirable, curtain strength of wall body is lower the deficiencies of.
Water seal curtain stake water-stagnating effect is preferable, ground construction is convenient, but water seal curtain stake intensity is inadequate, cost is higher, the duration is longer.Ground
Lower diaphragm wall barrier properties are good, adaptable, effect is high, reliable in quality, but material construction is high, and used in concrete sand,
The aggregates such as stone need to be obtained by digging husky, quarrying, and welding is incompatible with existing environmental protection policy.
Summary of the invention
Shut off underground curtain wall fly ash base impervious material in view of this, the present invention provides a kind of antiseepage, the impervious material
Without sand, stone, and power plant waste flyash can be utilized, solid waste discharge can be reduced and reduce the destruction to environment, it is green
Colour circle is protected；Pour to form underground curtain wall using the impervious material, have it is easy for construction, casting craft process is simple, institute's shape
At diaphram wall is adaptable, barrier properties are good.
The present invention is to reach its purpose, is adopted the following technical scheme that
The present invention provides a kind of antiseepage and shuts off underground curtain wall fly ash base impervious material, including following parts by weight at
Point:
40 parts of cement, 50-70 parts of flyash, 5-10 parts of silicon ash, 2-4 parts of bentonite, 2-3 parts of sodium chloride, lignin sulfonic acid
1.5-3 parts of calcium and 60-70 parts of water.The water is preferably drinking water, can guarantee the degree of purity of water used using drinking water.It is excellent
Selecting the flyash is 55-65 parts by weight (such as 60 parts), and the barrier properties of gained impervious material are good, economy is high.
Antiseepage of the invention is shut off underground curtain wall fly ash base impervious material, and the optimization allotment of formula system, nothing are passed through
Sand, stone need to be used, power plant waste flyash is made full use of, the flyash that can add high additive (such as reaches 60%, is based on water
Mud and flyash gross mass), it realizes that the green of flyash, environmental protection utilize, reduces antiseepage and shut off underground curtain wall project cost, mention
High construction efficiency is realized and antiseepage shuts off underground curtain wall is continuous, effective antiseepage.NaCl is added in formula system can make vitreum
Between formed key fracture, eject the potential activity of flyash, promote hydration reaction.Bentonite is added, with formula
Water in system acts on expansion, up to several times to 20-30 times, can effectively fill opencut antiseepage and shut off underground curtain wall fly ash base
Good anti-seepage effect is realized in the gap of mortar Seed harvest.Be added calcium lignosulfonate can in pumping and casting process incite somebody to action
The opencut antiseepage gas in the curtain wall fly ash base impervious material of underground that shuts off is drawn, and impervious material porosity reduces, more
It is closely knit；By the compound action of each component, antiseepage is made to shut off underground curtain wall fly ash base impervious material without using sandstone
In the case of, it is easy for construction, it is formed by that diaphram wall is adaptable, barrier properties are good.
In preferred embodiment, the bentonite contains >=montmorillonite of 85wt%, partial size is≤200 mesh.
In preferred embodiment, the flyash is II grade or more flyash, preferably II grade or more power plant's dry ash.Ability
Known to field technique personnel, the standard of II grade of flyash is fineness (45um airflow screen, screen over-size)≤20%, loss on ignition≤
8%, water demand ratio≤105%, water content≤1%, percentage refers both to mass percent.
In preferred embodiment, the cement can for ordinary portland cement, portland cement, portland slag cement,
Portland-pozzolan cement or composite Portland cement, specific is, for example, the ordinary portland cement of PO42.5.
In preferred embodiment, the silicon ash accounts for 80wt% or more, 0.1~0.3um of average grain diameter less than 1um for fineness
Dry ash.Using preferred silicon ash, silicon ash can hole between filling concrete, fly ash grain, produce gel with hydrated product,
Resistance to compression, anti-folding, impervious, anti-corrosion property energy are improved, while can be retained, anti-isolation, bleeding.
Antiseepage provided by the invention is shut off underground curtain wall fly ash base impervious material, and preparation process is simple.It can use
Prepared by the preparation method included the following steps: water, sodium chloride, calcium lignosulfonate be mixed evenly；It is added later swollen
Profit soil, stirs evenly；Remaining ingredient is added, is stirred evenly, underground curtain wall fly ash base impervious material is obtained.
Shut off underground curtain wall the present invention also provides a kind of antiseepage, pours to be formed using impervious material described above, it is excellent
Selecting the antiseepage underground curtain wall that shuts off is that opencut antiseepage is shut off underground curtain wall.
Shut off the construction method of underground curtain wall the present invention also provides a kind of antiseepage, includes the following steps:
1) the first slot section and the second slot section are excavated, pours impervious material, juxtaposition into the first slot section and the second slot section respectively
Change the mud in the first slot section and the second slot section；Continuous Seed harvest is respectively formed in the first slot section and the second slot section；
2) third slot section is excavated between the first slot section and the second slot section, pours impervious material, juxtaposition into third slot section
Change the mud in third slot section；Form continuous Seed harvest in third slot section, and the Seed harvest that is formed of third slot section respectively with institute
The Seed harvest for stating the first slot section and the second slot section mutually overlaps, and forms the antiseepage and shuts off underground curtain wall；
Impervious material described in step 1) and step 2) is underground curtain wall fly ash base impervious material described above.
Using above-mentioned construction method, it is able to achieve reasonable, orderly excavation, and is conducive to improve and pours efficiency, avoids pouring between adjacent slot section
When interfere with each other, it is ensured that pour and go on smoothly.
In some embodiments, can pass through and repeat step 1) -2), form two sections or more mutual overlapped antiseepage shuts off undergrounds
Curtain wall forms the antiseepage that multistage overlaps and shuts off underground curtain wall.
Preferably, after the operation of step 1) is completed 6-10 days, then step 2) is carried out.
Preferably, before Xiang Suoshu the first slot section or the second slot section or third slot section pour the impervious material, to need to pour
The grout pipe arranged in the slot section of impervious material for conveying the impervious material is built, and the outlet at bottom distance of grout pipe need to be poured
The distance for building the slot bottom of the slot section of impervious material is 10-15cm, pours impervious material in this way, impervious material is poured
In bottom, directly the mud in slot section can be displaced.
Antiseepage of the present invention shuts off underground curtain wall fly ash base impervious material particularly suitable for cutting in opencut antiseepage
It is applied in stream underground curtain wall.
Technical solution provided by the invention has the following beneficial effects:
Antiseepage provided by the invention is shut off underground curtain wall fly ash base impervious material, have grouting curtain it is easy for construction,
The characteristic that casting craft process is simple and diaphram wall is adaptable, barrier properties are good；And it is discarded to can make full use of power plant
Object flyash reduces the discharge of solid waste, environmentally protective.
Antiseepage provided by the invention is shut off the alternative traditional impervious concrete of underground curtain wall fly ash base impervious material
Or plastic concrete, have the characteristics that low cost, high antiseepage, realizes that the green of flyash, environmental protection utilize, mitigate sand, stone digging
Environmental protection pressure, reduce antiseepage and shut off underground curtain wall project cost, improve construction efficiency, realize that antiseepage is shut off underground curtain wall
Continuously, effectively antiseepage improves anti-seepage effect, sufficiently saving water resource, realizes the green technical conservation water of mining of surface mine.
Antiseepage of the invention is shut off underground curtain wall alternative traditional bored grouting curtain and concrete underground continuous wall.
Detailed description of the invention
Fig. 1 is that the antiseepage underground curtain wall that shuts off pours schematic diagram.
Fig. 2 is that antiseepage is shut off underground curtain wall plan view.
Description of symbols:
1, slot section；2, grout pipe；3, mud；4, the Seed harvest of the first slot section；5, the Seed harvest of the second slot section；6, third slot
The Seed harvest of section；7, antiseepage is shut off underground curtain wall.
Specific embodiment
For a better understanding of the technical solution of the present invention, below with reference to the embodiment content that the present invention is further explained,
But the contents of the present invention are not limited only to following embodiment.
It is raw materials used in following embodiment to be described as follows:
Cement: the ordinary portland cement of Yakeshi Meng Xi cement plant PO42.5.
Flyash: II grade of flyash of Huaneng Group compound river power plant.
Bentonite: mineralogical composition >=85wt% montmorillonite, partial size≤200 mesh.
Sodium chloride: the NaCl of analysis pure 99%.
Silicon ash: SiO2Content >=92wt%, fineness account for 80wt% or more less than 1um's, 0.1~0.3um's of average grain diameter
Dry ash, producer are Henan Yuan Heng environment-friendly engineering company.
Embodiment 1
Impervious material raw material (each number is parts by weight): 40 parts of cement, 60 parts of flyash, 5 parts of silicon ash, bentonite 2
Part, 2 parts of sodium chloride, 1.5 parts of calcium lignosulfonate and 70 parts of drinking water.
1.1, opencut antiseepage is prepared in accordance with the following steps to shut off underground curtain wall fly ash base impervious material:
Step 1) takes drinking water, sodium chloride, calcium lignosulfonate to be placed in slurries blender uniformly to stir according to formulation weight
Mix 30s；
Step 2) takes bentonite that uniform stirring 20s in the solution after step 1) stirs is added according to formulation weight；
Cement, flyash, silicon ash are separately added into the mixture after step 2) stirring by step 3) according to formulation weight,
It is stirring while adding, it is added in 20s, uniform stirring 90s.
1.2, opencut antiseepage is poured to shut off underground curtain wall:
Antiseepage, which is shut off, uses mud off during curtain wall grooving, and mud balance is 1.08g/cm in slot section3Left and right, slot
Bottom slurry is likely to be breached 1.2g/cm3；It pours in accordance with the following steps:
Step 1), after the completion of the first slot section and the second slot section are excavated, test the width and verticality of each slot section, meeting
In the case where design requirement, grout pipe 2,2 distance from bottom slot bottom 15cm of grout pipe are arranged in slot section；It can be found in Fig. 1, for saying
The grouting of bright first slot section or the second slot section or third slot section pours process, i.e., before grouting, in slot section 1, (the slot section 1 be can be
First slot section, the second slot section or third slot section) in arrange grout pipe 2 in advance；
Impervious material obtained in above-mentioned the 1.1 of preparation is delivered to by big flow mortar pump by grout pipe 2 and has been excavated
The first slot section and the second slot section bottom, while uniformly trickling, slip casting rise in slot, and the mud 3 in displacement slot section is formed
Continuous Seed harvest 4,5.
Step 2), step 1) excavate third slot section after operating 7 days, similar with step 1), after the completion of excavation, test trough section
Width and verticality, in the case where meeting design requirement, in slot section arrange grout pipe 2, grout pipe distance from bottom slot bottom
15cm；The impervious material of each step in front 1.1 preparation is passed through into Pipeline transport to the third slot excavated by big flow mortar pump
Mud 3 in section in displacement slot section, and continuous Seed harvest 6 is formed in third slot section, in step 1) the first slot section and
The Seed harvest of second slot section effectively overlaps, and forms complete opencut antiseepage and shuts off underground curtain wall 7, referring to fig. 2.Each slot section
Width is 0.8m.
Opencut antiseepage made from the present embodiment is shut off underground curtain wall fly ash base impervious material specific gravity 1.6g/cm3, knot
Stone rate 98.5%, 7d compression strength 2.4MPa, 28d compression strength 5.6MPa, 60d compression strength 10.0MPa, 90d compression strength
11.5MPa, 28d antiosmotic pressure force value, which reach 0.7MPa, 60d antiosmotic pressure force value and reaches 0.8MPa, 90d antiosmotic pressure force value, to be reached
0.9MPa。
Embodiment 2
Impervious material raw material (each number is parts by weight): 40 parts of cement, 60 parts of flyash and 70 parts of drinking water.
2.1, opencut antiseepage is prepared in accordance with the following steps to shut off underground curtain wall fly ash base impervious material:
Step 1) takes drinking water according to formulation weight；
Cement, flyash are separately added into the mixture after step 1) stirring, side edged by step 2) according to formulation weight
It stirs, is added in 20s, uniform stirring 90s.
2.2, opencut antiseepage is poured to shut off underground curtain wall:
Antiseepage, which is shut off, uses mud off during curtain wall grooving, and mud balance is 1.08g/cm in slot section3Left and right, slot
Bottom slurry is likely to be breached 1.2g/cm3；It pours in accordance with the following steps:
Step 1), after the completion of the first slot section and the second slot section are excavated, test the width and verticality of each slot section, meeting
In the case where design requirement, grout pipe 2,2 distance from bottom slot bottom 15cm of grout pipe are arranged in slot section；It can be found in Fig. 1, for saying
The grouting of bright first slot section or the second slot section or third slot section pours process, i.e., before grouting, in slot section 1, (the slot section 1 be can be
First slot section, the second slot section or third slot section) in arrange grout pipe 2 in advance；
Impervious material obtained in above-mentioned the 2.1 of preparation is delivered to by big flow mortar pump by grout pipe 2 and has been excavated
The first slot section and the second slot section bottom, while uniformly trickling, slip casting rise in slot, and the mud 3 in displacement slot section is formed
Continuous Seed harvest 4,5.
Step 2), step 1) excavate third slot section after operating 7 days, similar with step 1), after the completion of excavation, test trough section
Width and verticality, in the case where meeting design requirement, in slot section arrange grout pipe 2, grout pipe distance from bottom slot bottom
15cm；The impervious material of each step in front 2.1 preparation is passed through into Pipeline transport to the third slot excavated by big flow mortar pump
Mud 3 in section in displacement slot section, and continuous Seed harvest 6 is formed in third slot section, in step 1) the first slot section and
The Seed harvest of second slot section effectively overlaps, and forms complete opencut antiseepage and shuts off underground curtain wall 7, referring to fig. 2.Each slot section
Width is 0.8m.
Opencut antiseepage made from the present embodiment is shut off underground curtain wall fly ash base impervious material specific gravity 1.54g/cm3,
Calculus rate 97%, 7d compression strength 1.6MPa, 28d compression strength 4.0MPa, 60d compression strength 5.3MPa, 90d compression strength
8.3MPa, 28d antiosmotic pressure force value, which reach 0.3MPa, 60d antiosmotic pressure force value and reaches 0.4MPa, 90d antiosmotic pressure force value, to be reached
0.5MPa。
Embodiment 3
Impervious material raw material (each number is parts by weight): 40 parts of cement, 60 parts of flyash, 2 parts of bentonite, lignin
1.5 parts of sulfoacid calcium and 70 parts of drinking water.
3.1, opencut antiseepage is prepared in accordance with the following steps to shut off underground curtain wall fly ash base impervious material:
Step 1) takes drinking water, calcium lignosulfonate to be placed in uniform stirring 30s in slurries blender according to formulation weight；
Step 2) takes bentonite that uniform stirring 20s in the solution after step 1) stirs is added according to formulation weight；
Cement, flyash are separately added into the mixture after step 2 stirring, side edged by step 3) according to formulation weight
It stirs, is added in 20s, uniform stirring 90s.
3.2, opencut antiseepage is poured to shut off underground curtain wall:
Antiseepage, which is shut off, uses mud off during curtain wall grooving, and mud balance is 1.08g/cm in slot section3Left and right, slot
Bottom slurry is likely to be breached 1.2g/cm3；It pours in accordance with the following steps:
Step 1), after the completion of the first slot section and the second slot section are excavated, test the width and verticality of each slot section, meeting
In the case where design requirement, grout pipe 2,2 distance from bottom slot bottom 15cm of grout pipe are arranged in slot section；It can be found in Fig. 1, for saying
The grouting of bright first slot section or the second slot section or third slot section pours process, i.e., before grouting, in slot section 1, (the slot section 1 be can be
First slot section, the second slot section or third slot section) in arrange grout pipe 2 in advance；
Impervious material obtained in above-mentioned the 3.1 of preparation is delivered to by big flow mortar pump by grout pipe 2 and has been excavated
The first slot section and the second slot section bottom, while uniformly trickling, slip casting rise in slot, and the mud 3 in displacement slot section is formed
Continuous Seed harvest 4,5.
Step 2), step 1) excavate third slot section after operating 7 days, similar with step 1), after the completion of excavation, test trough section
Width and verticality, in the case where meeting design requirement, in slot section arrange grout pipe 2, grout pipe distance from bottom slot bottom
15cm；The impervious material of each step in front 3.1 preparation is passed through into Pipeline transport to the third slot excavated by big flow mortar pump
Mud 3 in section in displacement slot section, and continuous Seed harvest 6 is formed in third slot section, in step 1) the first slot section and
The Seed harvest of second slot section effectively overlaps, and forms complete opencut antiseepage and shuts off underground curtain wall 7, referring to fig. 2.Each slot section
Width is 0.8m.
Opencut antiseepage made from the present embodiment is shut off underground curtain wall fly ash base impervious material specific gravity 1.53g/cm3,
Setting percentage 98.1%, 7d compression strength 1.1MPa, 28d compression strength 2.8MPa, 60d compression strength 4.2MPa, 90d compression strength
6.3MPa, 28d antiosmotic pressure force value, which reach 0.5MPa, 60d antiosmotic pressure force value and reaches 0.6MPa, 90d antiosmotic pressure force value, to be reached
0.7MPa。
Embodiment 4
Impervious material raw material (each number is parts by weight): 30 parts of cement, 70 parts of flyash and 70 parts of drinking water.
4.1, opencut antiseepage is prepared in accordance with the following steps to shut off underground curtain wall fly ash base impervious material:
Step 1) takes drinking water according to formulation weight；
Cement, flyash are separately added into the mixture after step 1) stirring, side edged by step 2) according to formulation weight
It stirs, is added in 20s, uniform stirring 90s.
4.2, opencut antiseepage is poured to shut off underground curtain wall:
Antiseepage, which is shut off, uses mud off during curtain wall grooving, and mud balance is 1.08g/cm in slot section3Left and right, slot
Bottom slurry is likely to be breached 1.2g/cm3；It pours in accordance with the following steps:
Step 1), after the completion of the first slot section and the second slot section are excavated, test the width and verticality of each slot section, meeting
In the case where design requirement, grout pipe 2,2 distance from bottom slot bottom 15cm of grout pipe are arranged in slot section；It can be found in Fig. 1, for saying
The grouting of bright first slot section or the second slot section or third slot section pours process, i.e., before grouting, in slot section 1, (the slot section 1 be can be
First slot section, the second slot section or third slot section) in arrange grout pipe 2 in advance；
Impervious material obtained in above-mentioned the 4.1 of preparation is delivered to by big flow mortar pump by grout pipe 2 and has been excavated
The first slot section and the second slot section bottom, while uniformly trickling, slip casting rise in slot, and the mud 3 in displacement slot section is formed
Continuous Seed harvest 4,5.
Step 2), step 1) excavate third slot section after operating 7 days, similar with step 1), after the completion of excavation, test trough section
Width and verticality, in the case where meeting design requirement, in slot section arrange grout pipe 2, grout pipe distance from bottom slot bottom
15cm；The impervious material of each step in front 4.1 preparation is passed through into Pipeline transport to the third slot excavated by big flow mortar pump
Mud 3 in section in displacement slot section, and continuous Seed harvest 6 is formed in third slot section, in step 1) the first slot section and
The Seed harvest of second slot section effectively overlaps, and forms complete opencut antiseepage and shuts off underground curtain wall 7, referring to fig. 2.Each slot section
Width is 0.8m.
Opencut antiseepage made from the present embodiment is shut off underground curtain wall fly ash base impervious material specific gravity 1.53g/cm3,
Calculus rate 98.2%, 7d compression strength 1.42MPa, 28d compression strength 3.0MPa, 60d compression strength 4.5MPa, 90d pressure resistance
6.1MPa is spent, 28d antiosmotic pressure force value, which reaches 0.1MPa, 60d antiosmotic pressure force value and reaches 0.3MPa, 90d antiosmotic pressure force value, to be reached
0.4MPa。
Embodiment 5
Impervious material raw material (each number is parts by weight): 50 parts of cement, 50 parts of flyash and 70 parts of drinking water.
5.1, opencut antiseepage is prepared in accordance with the following steps to shut off underground curtain wall fly ash base impervious material:
Step 1) takes drinking water according to formulation weight；
Cement, flyash are separately added into the mixture after step 1) stirring, side edged by step 2) according to formulation weight
It stirs, is added in 20s, uniform stirring 90s.
5.2, opencut antiseepage is poured to shut off underground curtain wall:
Antiseepage, which is shut off, uses mud off during curtain wall grooving, and mud balance is 1.08g/cm in slot section3Left and right, slot
Bottom slurry is likely to be breached 1.2g/cm3；It pours in accordance with the following steps:
Step 1), after the completion of the first slot section and the second slot section are excavated, test the width and verticality of each slot section, meeting
In the case where design requirement, grout pipe 2,2 distance from bottom slot bottom 15cm of grout pipe are arranged in slot section；It can be found in Fig. 1, for saying
The grouting of bright first slot section or the second slot section or third slot section pours process, i.e., before grouting, in slot section 1, (the slot section 1 be can be
First slot section, the second slot section or third slot section) in arrange grout pipe 2 in advance；
Impervious material obtained in above-mentioned the 5.1 of preparation is delivered to by big flow mortar pump by grout pipe 2 and has been excavated
The first slot section and the second slot section bottom, while uniformly trickling, slip casting rise in slot, and the mud 3 in displacement slot section is formed
Continuous Seed harvest 4,5.
Step 2), step 1) excavate third slot section after operating 7 days, similar with step 1), after the completion of excavation, test trough section
Width and verticality, in the case where meeting design requirement, in slot section arrange grout pipe 2, grout pipe distance from bottom slot bottom
15cm；The impervious material of each step in front 5.1 preparation is passed through into Pipeline transport to the third slot excavated by big flow mortar pump
Mud 3 in section in displacement slot section, and continuous Seed harvest 6 is formed in third slot section, in step 1) the first slot section and
The Seed harvest of second slot section effectively overlaps, and forms complete opencut antiseepage and shuts off underground curtain wall 7, referring to fig. 2.Each slot section
Width is 0.8m.
Opencut antiseepage made from the present embodiment is shut off underground curtain wall fly ash base impervious material specific gravity 1.59g/cm3,
Calculus rate 94.2%, 7d compression strength 2.2MPa, 28d compression strength 4.8MPa, 60d compression strength 6.5MPa, 90d compression strength
10.1MPa, 28d antiosmotic pressure force value, which reach 0.6MPa, 60d antiosmotic pressure force value and reaches 0.7MPa, 90d antiosmotic pressure force value, to be reached
0.8MPa。
Through the foregoing embodiment it can be found that using formula system of the invention, silicon ash, bentonite, sodium chloride, lignin
Sulfoacid calcium and cement and flyash are combined with each other, and synergy, not only flyash can reach higher additive amount, and can be obtained strong
Degree and the impervious impervious material being improved.Compared to embodiment 1, embodiment 2 do not add silicon ash, bentonite, sodium chloride and
Calcium lignosulfonate, intensity and impervious all opposite variation；Embodiment 3 does not add silicon ash and sodium chloride, intensity and impervious
Property also opposite be deteriorated.Embodiment 1 is compared with embodiment 5, using less cement and more flyash, is obtained
Intensity and anti-permeability performance more preferably antiseepage are shut off underground curtain wall.
It will be understood by those skilled in the art that under the introduction of this specification, the present invention can be made some modifications or
Adjustment.These modifications or adjustment should also be as within the scope of the claims in the present invention.
Claims (10)
- A kind of underground curtain wall fly ash base impervious material 1. antiseepage is shut off, which is characterized in that the ingredient including following parts by weight:40 parts of cement, 50-70 parts of flyash, 5-10 parts of silicon ash, 2-4 parts of bentonite, 2-3 parts of sodium chloride, calcium lignosulfonate 1.5-3 parts and 60-70 parts of water；It is preferred that the water is drinking water；It is preferred that the flyash is 55-65 parts by weight.
- 2. impervious material according to claim 1, which is characterized in that the bentonite contains >=montmorillonite of 85wt%, The bentonitic partial size≤200 mesh.
- 3. impervious material according to claim 1 or 2, which is characterized in that the flyash is II grade or more flyash, excellent It is selected as II grade or more power plant's dry ash.
- 4. impervious material according to claim 1-3, which is characterized in that the cement is normal silicate water Mud, portland cement, portland slag cement, portland-pozzolan cement or composite Portland cement, the preferably described cement are The ordinary portland cement of PO42.5.
- 5. impervious material according to claim 1-4, which is characterized in that the silicon ash is fineness less than 1um's Account for 80wt% or more, 0.1~0.3um of average grain diameter.
- 6. the preparation method of the described in any item impervious materials of claim 1-5, which comprises the steps of:Water, sodium chloride, calcium lignosulfonate are mixed evenly；Bentonite is added later, stirs evenly；Add remaining set Point, it stirs evenly, obtains underground curtain wall fly ash base impervious material.
- The underground curtain wall 7. a kind of antiseepage is shut off, which is characterized in that poured using impervious material described in any one of claims 1-6 It builds to be formed；It is preferred that the antiseepage is shut off, underground curtain wall is that opencut antiseepage is shut off underground curtain wall.
- The construction method of underground curtain wall 8. antiseepage as claimed in claim 7 is shut off, which comprises the steps of:1) the first slot section and the second slot section are excavated, pours impervious material into the first slot section and the second slot section respectively, and replaces the Mud in one slot section and the second slot section；Continuous Seed harvest is respectively formed in the first slot section and the second slot section；2) third slot section is excavated between the first slot section and the second slot section, pours impervious material into third slot section, and replaces the Mud in three slot sections；Continuous Seed harvest is formed in third slot section, and the Seed harvest that is formed of third slot section is respectively with described the The Seed harvest of one slot section and the second slot section mutually overlaps, and forms the antiseepage and shuts off underground curtain wall；Impervious material described in step 1) and step 2) is the described in any item impervious materials of claim 1-5.
- 9. construction method according to claim 8, which is characterized in that repeat step 1) -2), form two sections or more phase interconnections The antiseepage connect is shut off underground curtain wall.
- 10. construction method according to claim 8 or claim 9, which is characterized in that after the operation of step 1) is completed 6-10 days, then Carry out step 2)；And/or before Xiang Suoshu the first slot section or the second slot section or third slot section pour the impervious material, to antiseepage need to be poured The grout pipe for conveying the impervious material is arranged in the slot section of material, and the outlet at bottom distance of grout pipe need to pour antiseepage The distance of the slot bottom of the slot section of material is 10-15cm.
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