CN101130993A - Cut-off wall slurry material and wall building technique - Google Patents

Cut-off wall slurry material and wall building technique Download PDF

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Publication number
CN101130993A
CN101130993A CNA2007100240946A CN200710024094A CN101130993A CN 101130993 A CN101130993 A CN 101130993A CN A2007100240946 A CNA2007100240946 A CN A2007100240946A CN 200710024094 A CN200710024094 A CN 200710024094A CN 101130993 A CN101130993 A CN 101130993A
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wall
parts
water
mud
cut
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CN100516133C (en
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代国忠
史贵才
代璐
王兆林
周泓
鲁良辉
靖向党
齐永胜
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Changzhou Institute of Technology
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Changzhou Institute of Technology
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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
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039—Premixtures of ingredients
    • 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
    • C04B28/24—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 alkyl, ammonium or metal silicates; containing silica sols
    • C04B28/26—Silicates of the alkali metals
    • 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
    • C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
    • C04B2111/00293—Materials impermeable to liquids
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Soil Conditioners And Soil-Stabilizing Materials (AREA)

Abstract

The present invention discloses one kind of water tight wall grout material and the wall building process therewith. The wall grout material includes wall protecting slurry comprising bentonite or clay, sodium carbonate, selective flocculant, water loss lowering assistant and water; and curing original mortar comprising Portland cement, sand, fly ash, water glass, water reducing agent, cross-linking agent and water. The water tight wall building process includes the following steps: pouring wall protecting slurry into dug water tight wall slot, adding curing original mortar gradually into the slurry for mixing with wall protecting slurry during digging operation, and adding more water glass in the last stage for curing to form water tight wall. The water tight wall has excellent water tight performance, controllable solidification time, low cost and no pollution.

Description

Cut-off wall slurry material and wall building technique
Technical field
The invention belongs to underground seepage control project field, be specifically related to a kind of cut-off wall slurry material and wall building technique.
Background technology
60～eighties of 20th century, China's cut-off wall material mainly adopts rigid materials such as ordinary concrete (or steel concrete), clay concrete and fly ash concrete, these concrete material compressive strength height (5～35MPa), modulus of elasticity big (15000～32000MPa), be suitable for doing coefficient underground wall bodies such as antiseepage, retaining soil and load-bearing.If only be used for the antiseepage effect, too high (600～1200 yuan/m of employing rigid materials as its construction costs of body of wall 2), and local cracking phenomena easily takes place in rigid concrete under the foundation soil horizontal force action, cause impervious ability to reduce on the contrary.
To the eighties in 20th century, China's cut-off wall material has had great innovation.Flexible materials for walls such as wet concrete, self-solidifying mortar constantly come out.The materials for wall of this class flexibility is because of containing clay, flyash, water glass and other Admixture, present very big plasticity after the slurry material is fixed, its compressive strength lower (0.1～5MPa), modulus of elasticity is less than 2000MPa, be that foundation soil is more approaching around strength of wall body index and the impervious wall, the stressed back of body of wall is strong with the compatible deformation ability of foundation soil, is not prone to cracking.Good (the water absorption rate ω of unit≤10 of anti-permeability performance in addition -6M/s), construction costs is lower (120～400 yuan/m 2), compare with the rigidity materials for wall, as the body of wall of antiseepage, flexible materials for wall has very big development potentiality merely.
The wet concrete impervious wall it become wall technology to be: in groove section digging process, inject retaining wall with mud (also being referred to as stabilizing solution) in groove; When the grooving end of job, by pumping into method the wet concrete mixture is sent in the groove, and the existing mud in the groove is replaced.The wet concrete impervious wall is complex process not only, can not utilize existing mud in the groove, slurry material preparation cost height, and the mud waste is serious, and groove section quality of connection is relatively poor.
Self-solidifying mortar impervious wall is that in the diaphragm wall digging process, it plays slurry coat method with cement, swell soil, retarding agent and the formulated a kind of slurries of water, and after the slotted eye excavation was finished, slurries condensed into low intensive flexible body of wall voluntarily.Because the uncertainty of antiseepage wall chase section digging time has not often been excavated in the unit groove section, condensation cure has taken place in mortar in the groove.Therefore, self-solidifying mortar impervious wall is not easy to site operation, and materials for wall is impervious relatively poor.
Summary of the invention
One of purpose of the present invention is to provide a kind of low cost, pollution-free, cut-off wall slurry material that anti-permeability performance is good.
Another object of the present invention provides the simple impervious wall wall building technique of a kind of technology.
The technical scheme that realizes the present invention's first purpose is: a kind of cut-off wall slurry material comprises retaining wall mud and the original mortar of curing; Wherein retaining wall has following components by part by weight with mud: 30～150 parts of swell soil or clays, 1～12 part of soda ash, 0.1～1.5 part of selective flocculant, 0.5～8.0 part of filtrate loss reduction additive, 860～980 parts in water; Solidify and have following components by part by weight: 180～400 parts of portland cements, 100～500 parts of sands, 25～120 parts in flyash, 16～80 parts of water glass, 0.2～2.0 part of the poly-type water reducing agent of resistance, 0.1～1.0 part of crosslinking agent, 80～240 parts in water with original mortar.Water glass component wherein adds at twice: add 40%～60%, remaining 60%～40% during the preparation mortar and add after the pore-creating of groove section finishes.
Described retaining wall is 0.5: 1～0.9: 1 with mud with the mixed volume ratio that solidifies with original mortar unit prescription.
Described retaining wall with the selective flocculant in the mud be molecular weight greater than 1,500,000, the hydrolyzed polyacrylamide of degree of hydrolysis about 30%; Filtrate loss reduction additive is sodium carboxymethyl cellulose or hydrolyzed polyacrylonitrile.Described curing is naphthalenesulfonate condensation polymer or iron network lignosulfonates with the poly-type water reducing agent of the resistance in the original mortar; Crosslinking agent is an inorganic aluminate, preferably sulfuric acid aluminium.
The technical scheme that realizes another purpose of the present invention is: a kind of wall building technique is characterized in that having following steps:
1. in the unit groove section digging process of impervious wall, in groove, inject retaining wall mud;
2. in the trenching construction latter stage of unit groove section, progressively in the groove in the mud admixture solidify and use original mortar, realize when the groover digging in the groove that existing mud and curing are with the first mixing of original mortar; Described retaining wall has following components by part by weight with mud: 30～150 parts of swell soil or clays, 1～12 part of soda ash, 0.1～1.5 part of selective flocculant, 0.5～8.0 part of filtrate loss reduction additive, 860～980 parts in water; Described curing has following components by part by weight with original mortar: 180～400 parts of portland cements, 100～500 parts of sands, 25～120 parts in flyash, 8～40 parts of water glass, 0.2～2.0 part of the poly-type water reducing agent of resistance, 0.1～1.0 part of crosslinking agent, 80～240 parts in water;
3. after the pore-creating of groove section finishes, add 8～40 parts of water glass again, stir the final evenly mixing that all slurries in the groove are realized in the back, form the body of wall of impervious wall in the time in condensation cure through mechanical agitation or compressed air.Described condensation cure time≤24h.
Good effect of the present invention is: (1) is of the present invention thisly to be compared with present existing same type of material (wet concrete) with the flexible barrier wall new wall materials of mud based on retaining wall, the waste mud of its grooving operation need not discharging, wall is made in processing on the spot, have strong, compressive strength of good barrier performance, time of setting controllability and modulus of elasticity and suit, have better erosion-resisting characteristics and low and pollution-free with compatible deformation ability, stable long-term strength, the cost of ground, mortar curing system is stirred wall building technique and is convenient to execute-in-place, and the scope of application is extensive.(2) curing of the present invention with adopt in the original mortar inorganic aluminate particularly aluminum sulfate because it can play crosslinked coagulation to polyacrylamide in the mud and hydrolyzed polyacrylonitrile, guaranteed the pliability of body of wall as crosslinking agent.(3) wall building technique of the present invention only adds a part of water glass when mud and mortar mix for the first time, can avoid the slurries premature set like this, after groove section pore-creating by the time finishes, adds remaining water glass again, and forms body of wall in condensation cure in the time.(4) the used mud of impervious wall grooving among the present invention, its performance indications are: density≤1.28g/cm 3, funnel viscosity 20～50s, dynamic filtration amount≤28ml/30min, yield value 1.5～4.5Pa, ratio of dynamic shear force/yield value to plastic viscosity about 0.48, have good shear thinning behavior and Gu Bi effect.(5) performance indications of the cut-off wall of the present invention's formation are: density 1.3～1.7g/cm 3, the body of wall 28d compressive strength of condensing 0.3～1.5MPa, modulus of elasticity 50～800MPa, shear strength 0.10～0.45MPa, the water absorption rate ω of unit≤10 -6(be equivalent to transmission coefficient is n * 10 to cm/s -6～n * 10 -8Cm/s); Newly mix the mixed serum time 〉=4h that loses flowability, condensation cure time≤24h.
The specific embodiment
(embodiment 1)
Retaining wall is (units/m with the component and the content that do not disperse low solid phase high-quality bentonite slurry 3): swell soil 70, soda ash 2.5, hydrolyzed polyacrylamide 0.16, hydrolyzed polyacrylonitrile 1.5, water 940.
The component and the content that solidify with original mortar are (by making 1m 3The impervious wall volume calculates, units/m 3): No. 425 Portland cements 240, sand 120, flyash 35, water glass 20, naphthalenesulfonate condensation polymer 1.2, aluminum sulfate 0.3, water 108.
Use 0.6m 3Retaining wall with mud and 1m 3Curing mix with original mortar (unit prescription) and can produce 1m 3Impervious wall.Concrete making step is: in the unit groove section digging process of impervious wall, inject retaining wall mud in groove; In the trenching construction latter stage of unit groove section, progressively in the groove in the mud admixture solidify and use original mortar, realize that when the groover digging curing mixes with the first of mud with retaining wall in the groove with original mortar; Retaining wall with the component and the content of mud is: swell soil 70kg, soda ash 2.5kg, hydrolyzed polyacrylamide 0.16kg, hydrolyzed polyacrylonitrile 1.5kg, water 940kg.The component and the content that solidify with original mortar are: No. 425 Portland cement 240kg, sand 120kg, flyash 35kg, water glass 8kg, naphthalenesulfonate condensation polymer 1.2kg, aluminum sulfate 0.3kg, water 108kg.
After the pore-creating of groove section finishes, in groove, add remaining 12kg water glass, inhale anti-circulation by pump and add the final evenly mixing that compressed air mixer is realized all slurries in the groove, condensation cure forms cut-off wall in 24 hours.
But the pump phase of the mixed liquor of present embodiment is 60min, and the initial setting time is 8 hours 50 minutes, and final set hardening time is 21 hours 15 minutes, the body of wall 7d compressive strength of condensing is 0.158MPa, 14d compressive strength is 0.30MPa, and 28d compressive strength is 0.39MPa, and the transmission coefficient of 28d is 4.6 * 10 -7Cm/s.
(embodiment 2)
Retaining wall sees Table 1 with mud and the component and the consumption that solidify with original mortar, and wall building technique is substantially the same manner as Example 1, hydrated glass 10kg when difference is to mix for the first time, and remaining 10kg water glass adds at twice.The mixed liquor parameter sees Table 2.
(embodiment 3)
Retaining wall sees Table 1 with mud and the component and the consumption that solidify with original mortar, and wall building technique is substantially the same manner as Example 1, hydrated glass 10kg when difference is to mix for the first time, and remaining 15kg water glass adds at twice.The mixed liquor parameter sees Table 2.
Curing mortar impervious wall of the present invention becomes the wall thickness degree to be generally 15～150cm, and its bottom should embed 0.5～1.0m in basement rock or the impervious layer, becomes the darkest 60m that reaches of the wall degree of depth.
Table 1
Embodiment 1 Embodiment 2 Embodiment 3
Retaining wall mud (kg/m 3) Swell soil 70 Clay for preparing mud 110 Swell soil 50
Soda ash 2.5 Soda ash 5.5 Soda ash 2.0
Hydrolyzed polyacrylamide 0.16 Hydrolyzed polyacrylamide 0.18 Hydrolyzed polyacrylamide 0.15
Hydrolyzed polyacrylonitrile 1.5 Sodium carboxymethyl cellulose 2.2 Hydrolyzed polyacrylonitrile 2.8
Water 940 Water 900 Water 952
Solidify with the original prescription (kg/m of mortar unit 3) No. 425 Portland cements 240 No. 425 Portland cements 300 No. 425 Composite portland cements 280
Sand 120 Sand 150 Sand 140
Flyash 35 Flyash 38 Flyash 40
Water glass 20 Water glass 20 Glass 25
Naphthalenesulfonate condensation polymer 1.2 Iron network lignosulfonates 0.7 Naphthalenesulfonate condensation polymer 1.0
Aluminum sulfate 0.3 Aluminum sulfate 0.3 Aluminum sulfate 0.4
Water 108 Water 150 Water 145
Retaining wall is with mud and solidify the mixed volume ratio of filling a prescription with original mortar unit 0.6∶1 0.65∶1 0.67∶1
Table 2
Embodiment 1 Embodiment 2 Embodiment 3
But the pump phase (min) ?60 ?70 ?65
Initial setting time 8 hours 50 minutes 9 hours 30 minutes 9 hours 20 minutes
The condensation cure time 21 hours 15 minutes 21 hours 45 minutes 21 hours 10 minutes
7d compressive strength (MPa) ?0.158 ?0.428 ?0.412
14d compressive strength (MPa) ?0.30 ?0.579 ?0.475
28d compressive strength (MPa) ?0.39 ?0.695 ?0.585
The transmission coefficient of 28d (cm/s) ?4.6×10 -7 ?5.7×10 -7 ?5.3×10 -7

Claims (7)

1. cut-off wall slurry material is characterized in that: it comprises that retaining wall is with mud with solidify and uses original mortar;
Wherein retaining wall has following components by part by weight with mud: 30～150 parts of swell soil or clays, 1～12 part of soda ash, 0.1～1.5 part of selective flocculant, 0.5～8.0 part of filtrate loss reduction additive, 860～980 parts in water;
Solidify and have following components by part by weight: 180～400 parts of portland cements, 100～500 parts of sands, 25～120 parts in flyash, 16～80 parts of water glass, 0.2～2.0 part of the poly-type water reducing agent of resistance, 0.1～1.0 part of crosslinking agent, 80～240 parts in water with original mortar.
2. cut-off wall slurry material according to claim 1 is characterized in that: described retaining wall is 0.5: 1～0.9: 1 with mud with the mixed volume ratio that solidifies with original mortar unit prescription.
3. cut-off wall slurry material according to claim 1 is characterized in that: described retaining wall is a hydrolyzed polyacrylamide with the selective flocculant in the mud; Filtrate loss reduction additive is sodium carboxymethyl cellulose or hydrolyzed polyacrylonitrile.
4. cut-off wall slurry material according to claim 1 is characterized in that: described curing is naphthalenesulfonate condensation polymer or iron network lignosulfonates with the poly-type water reducing agent of the resistance in the original mortar; Crosslinking agent is an inorganic aluminate.
5. cut-off wall slurry material according to claim 4 is characterized in that: described inorganic aluminate is an aluminum sulfate.
6. impervious wall wall building technique is characterized in that having following steps:
1. in the unit groove section digging process of impervious wall, in groove, inject retaining wall mud;
2. in the trenching construction latter stage of unit groove section, progressively in the groove in the mud admixture solidify and use original mortar, realize when the groover digging in the groove that existing mud and curing are with the first mixing of original mortar; Described retaining wall has following components by part by weight with mud: 30～150 parts of swell soil or clays, 1～12 part of soda ash, 0.1～1.5 part of selective flocculant, 0.5～8.0 part of filtrate loss reduction additive, 860～980 parts in water; Described curing has following components by part by weight with original mortar: 180～400 parts of portland cements, 100～500 parts of sands, 25～120 parts in flyash, 8～40 parts of water glass, 0.2～2.0 part of the poly-type water reducing agent of resistance, 0.1～1.0 part of crosslinking agent, 80～240 parts in water;
3. after the pore-creating of groove section finishes, add 8～40 parts of water glass again, stir the final evenly mixing that all slurries in the groove are realized in the back, form the body of wall of impervious wall in the time in condensation cure through mechanical agitation or compressed air.
7. wall building technique according to claim 6 is characterized in that: step 3. described in condensation cure time≤24h.
CNB2007100240946A 2007-07-16 2007-07-16 Cut-off wall slurry material and wall building technique Expired - Fee Related CN100516133C (en)

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CN102409692A (en) * 2011-11-14 2012-04-11 曹传松 Anti-seepage protection method at archaeological excavation site
CN102515686A (en) * 2011-11-29 2012-06-27 李子现 Light wall body material
CN102617092A (en) * 2012-04-18 2012-08-01 长沙理工大学 Controllable clay and cement seepage-proof reinforcement paste
CN102677630A (en) * 2012-05-18 2012-09-19 浙江省水电建筑安装有限公司 Construction method of concrete cut-off wall in sludge soil with high water content
CN103254878A (en) * 2013-04-15 2013-08-21 中交路桥华南工程有限公司 Slurry for bridge construction, and preparation method and application thereof
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CN102409692A (en) * 2011-11-14 2012-04-11 曹传松 Anti-seepage protection method at archaeological excavation site
CN102515686A (en) * 2011-11-29 2012-06-27 李子现 Light wall body material
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CN102677630A (en) * 2012-05-18 2012-09-19 浙江省水电建筑安装有限公司 Construction method of concrete cut-off wall in sludge soil with high water content
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CN104047565A (en) * 2014-06-18 2014-09-17 葛洲坝集团基础工程有限公司 Handling method for diaphragm wall slotted hole cement grout leakage
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CN104498002B (en) * 2014-11-25 2017-05-03 常州工学院 Underground engineering sodium silicate collapse-proofing wall solidification type slurry and preparation method thereof
CN105040745A (en) * 2015-07-10 2015-11-11 河海大学 Soil-bentonite vertical diaphragm wall and construction method thereof
CN105236901A (en) * 2015-08-31 2016-01-13 北京高能时代环境技术股份有限公司 Plastic concrete for preventing seepage and preparation method thereof
CN105236901B (en) * 2015-08-31 2017-06-09 北京高能时代环境技术股份有限公司 A kind of plastic concrete for antiseep and preparation method thereof
CN107129186A (en) * 2017-04-21 2017-09-05 中铁四局集团有限公司 A kind of ground-connecting-wall composite sludge
CN107558492A (en) * 2017-10-11 2018-01-09 苏州大学 A kind of compound underground anti-seepage isolation wall construction and construction method
CN108560573A (en) * 2018-02-02 2018-09-21 建昌县水利局 A kind of construction method of water conservancy project underground cut-off wall
CN109734352A (en) * 2019-01-25 2019-05-10 中交二航武汉港湾新材料有限公司 Extra retarded set self-hardening slurry enhances additive and preparation method
CN110436882A (en) * 2019-08-16 2019-11-12 福建省岚禹建设工程有限公司 A kind of self-hardening slurry and its dyke seepage control reinforcement means
CN110436882B (en) * 2019-08-16 2020-07-21 福建省岚禹建设工程有限公司 Self-setting mortar and dam seepage-proofing reinforcing method thereof
CN111042168A (en) * 2019-12-23 2020-04-21 中水东北勘测设计研究有限责任公司 Self-setting mortar plastic concrete anti-seepage wall forming process
CN111455976A (en) * 2020-04-14 2020-07-28 江西省水利科学研究院 Construction method of self-setting mortar impervious wall by grooving method
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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