CN104446208A - Filling material for treating karst ground collapse and preparation method thereof - Google Patents
Filling material for treating karst ground collapse and preparation method thereof Download PDFInfo
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- CN104446208A CN104446208A CN201410721109.4A CN201410721109A CN104446208A CN 104446208 A CN104446208 A CN 104446208A CN 201410721109 A CN201410721109 A CN 201410721109A CN 104446208 A CN104446208 A CN 104446208A
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Abstract
The invention discloses a filling material for treating karst ground collapse and a preparation method of the filling material. The filling material mainly comprises an organic excitation cementing material and a structural foam material, wherein the organic excitation cementing material consists of an inorganic mixed material, polystyrene and phthalic anhydride according to a weight ratio of 1:(1.5-3.5):(2.8-4.9), and the inorganic mixed material consists of zeolite, gypsum and sodium sulfate according to a weight ratio of 1:1:1; the structural foam material consists of urea formaldehyde and polyurethane according to a weight ratio of 1:(2.3-3.5); and the weight ratio of the organic excitation cementing material to the structural foam material is 1:(2.5-3.8). The filling material disclosed by the invention is simple in composition, is environmental friendly and pollution-free, and has good mechanical performance, water permeability and cementing strength.
Description
Technical field
The present invention relates to a kind of compaction material for administering karst ground subsidence and preparation method, belonging to geological hazard control field of engineering technology.
Background technology
Oneself is quite serious for the geological hazards that current China is caused by karst ground subsidence.The whole nation is annual there is karst ground subsidence geologic hazard thousands of, causes financial loss nearly billions of unit.Wherein affect serious area and be mainly distributed in the ground such as Guangxi, Yunnan, Guizhou.The generation of karst ground subsidence geologic hazard not only causes the infringement of the structures such as buildings, road, affects the normal production and operation, but also threatens human life, harm ecotope, causes huge financial loss.
Traditional karst ground subsidence geological hazard control method usually adopt change fill out, be in the milk, concussion burst, leap etc., its principle is mainly by reducing the distributive law of solution cavity, or the stability strengthening solution cavity makes its bearing capacity effectively improve, thus alleviates its harm.When applying Synthetical control system and administering karst ground subsidence geologic hazard, the size of solution cavity scale is the key that Treatment process is chosen, the thickness size of clay distribution is very high for the requirement of control measures, when diameter as solution cavity is less than 5m, the degree of depth of distance soil layer is less than 3m, under the effect of soil arching effect, stress can meet the soil body from steady requirement.Treatment process generally adopts slip casting method, namely adopts sand-cement slurry mixture to carry out filling, supports upper soil horizon weight, prevent it under the corrosion of underground water, continuing slump, expand the scope of solution cavity.When the diameter of solution cavity is greater than 5m, is greater than 3m apart from the degree of depth of soil layer, the reactive force of soil arching effect can not meet the soil body when steady requirement, generally adopts the methods such as concussion burst, pile foundation, leap to administer.
Consolidating material has vital effect in the consolidated fill of karst region, and the composition of consolidating material and performance directly affect effect and the cost of consolidated fill.Karst region consolidated fill underground karst cavity both can have been avoided to cause surface subsidence, ecological damage and potential safety hazard, can improve again resource utilization, consume solid waste in a large number, consolidated fill fills the most attention that improvement method has obtained engineering circles.The people such as TatianaBakharev (Alkali activation of Australian slag cements [J] .Cement andConcrete Research:1999 (29) .) adopt the different activators such as water glass, sodium hydroxide, sodium carbonate to activate blast-furnace slag, produce cemented filling material, engineer applied result shows, the adhesive bond ultimate compression strength of this compaction material is very high, but time of coagulation is long, easily run off under the effect of underground water.The people such as A.R.Brough (Sodium silicate-based; alkali-activated slag mortars Part1 [J] .Strength; hydration and microstrure Cement and Concrete Research; 2002; 32:865-879.) activate granulated blast-furnace slag by water glass; and add NaCl to adjust time of coagulation, find after NaCl adds, have rapid hardening effect, but poor with Rock And Soil cementing power.The people such as Taylor (Cement Chemistry [M], Academeic, London, 1990.) adopt raw material based on flyash, K class alkali produces compaction material as exciting agent, and its strength and stability is all better, but the C-S-H gel structure water-permeable in adhesive bond is poor, be easy to the footpath stream mode changing underground water, cause solution cavity to new Directional Extension, cause secondary disaster.Sand-cement slurry compaction material traditional is in addition not easily cementing under the height water condition of underground, and workability, less stable, filling slurry easily produce in preparation with course of conveying emanate, the phenomenon such as plugging, consolidating material with the bonding process of Rock And Soil in can produce " argillization is not cementing " phenomenon, regulation effect can not effectively be ensured.
In sum, the administering method of traditional karst ground subsidence geologic hazard and compaction material exist cost cementing power that is high, that destroy groundwater flow mode, charges and the soil body poor, easily run off, to the shortcomings such as geology environmental perturbation is large, be unfavorable for applying.How to develop practicable karst ground subsidence geologic hazard compaction material and preparation method oneself through becoming following problem demanding prompt solution.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of economy, effectively for administering compaction material and the preparation method of karst ground subsidence.
Compaction material for administering karst ground subsidence of the present invention, excites consolidating material and structural foam composition primarily of organic, wherein:
Described organic consolidating material that excites is made up of inorganic hybrid materials, polystyrene and the Tetra hydro Phthalic anhydride weight ratio by 1:1.5 ~ 3.5:2.8 ~ 4.9, and wherein said inorganic hybrid materials is made up of zeolite, gypsum and the sodium sulfate weight ratio by 1:1:1;
Described structural foam is made up of by the weight ratio of 1:2.3 ~ 3.5 urea formaldehyde (polymkeric substance that urea and formaldehyde reaction obtain) and urethane (polyurethane(s));
Described organic weight ratio of consolidating material and structural foam that excites is 1:2.5 ~ 3.8.
Component conventional in some prior aries is also comprised, as retardant, water repellent agent and activator etc. in the above-mentioned compaction material for administering karst ground subsidence.Consumption and the selection of described retardant, water repellent agent and activator are all same as the prior art.Described retardant is preferably sodium-chlor, Sodium Tetraborate, sodium sulfate or magnesium sulfate etc.; The consumption of described retardant is account for compaction material gross weight 0.001 ~ 0.003%; Described water repellent agent is hydrophobic polyurethane injection slurry, is preferably SUP-202 single-liquid type hydrophobic polyurethane injection slurry, SL-669 single-liquid type PU foaming water repellent agent or SL-668 single-liquid type PU foaming water repellent agent etc.; The consumption of described water repellent agent is account for compaction material gross weight 0.001 ~ 0.003%; Described activator is acetylene alcohol or ether material, and wherein ether material can be dme, ether or phenyl ether etc., and the consumption of described activator is account for compaction material gross weight 0.001 ~ 0.003%.
In technical solutions according to the invention, excite in the composition of consolidating material organic, the weight ratio of inorganic hybrid materials, polystyrene and Tetra hydro Phthalic anhydride is preferably 1:2.0 ~ 3.0:3.2 ~ 4.4, is more preferably 1:2.8:3.5; In the composition of structural foam, the weight ratio of urea formaldehyde and urethane is preferably 1:2.5 ~ 3.0, is more preferably 1:2.9.
In technical solutions according to the invention, the granularity of described gypsum and sodium sulfate is generally 200 order ~ 300 orders, and the granularity of described zeolite is generally 100 order ~ 200 orders; The granularity of described polystyrene is generally 1 ~ 5mm (diameter).
In technical solutions according to the invention, described polystyrene also can be industrial waste polystyrene.
The viscosity of the compaction material obtained by formula of the present invention is 380 ~ 760Mpas.
Compaction material of the present invention can be prepared by existing ordinary method, is preferably prepared as follows:
1. take corresponding raw material by organic composition of consolidating material that excites, be added to stirrer by the order of inorganic hybrid materials, polystyrene, Tetra hydro Phthalic anhydride, stir 10 ~ 15 minutes, sealed storage after taking out;
2. take corresponding raw material by the composition of structural foam, be placed in stirrer and stir 10 ~ 15 minutes, sealed storage after taking out;
3. excite consolidating material and structural foam to be placed in stirrer by proportioning to stir, obtain compound by organic before use.
4. in gained compound, add the retardant of proportional quantity, water repellent agent and activator, can use after mixing.
When using compaction material of the present invention to administer karst collapse, the preferred high-pressure slip-casting form of routine that adopts injects cave, wherein grouting pressure is not less than 50 ~ 100Mpa, grout spreading range R is 2 ~ 3m, slip casting spacing is preferably 4 ~ 6m, the slurry amount injected is determined according to solution cavity physical size, and slip casting angle is generally 40 ° ~ 45 °.
Compared with prior art, the invention has the advantages that:
1, compaction material of the present invention composition is simple, environment friendly and pollution-free, and material is easy to get, and have enough resources, preparation method is simple and easy to control, compared with the compaction material such as traditional sand-cement slurry, significantly reduces treatment cost.
2, compaction material of the present invention has excellent compression, stretching, shearing, the mechanical property such as bending.Organic excite consolidating material to be combined with structural foam after there occurs high poly-reaction, increase the length of molecular chain, molecular chain is longer, and hardness is larger, and mechanical property is better.Compared with traditional material, fatigue resistance and shock resistance better, be a kind of matrix material of high-strength light.
3, compaction material of the present invention has good workability, substantially improves the stability of two-phase pulp flow, solves the difficult problem such as segregation, plugging of filling slurry in preparation with course of conveying.
4, compaction material of the present invention has good mechanical property, water permeability, consolidation strength, can be cementing under high water condition, efficiently solves the problem that in solution cavity, in groundwater flow process, construction material runs off.
5, under the above operations, effectively can overcome traditional common consolidating material in solution cavity after filling, the difficult problem of " argillization is not cementing " in cementing with hole wall, and it is more convenient, quick to construct.
Accompanying drawing explanation
Fig. 1 is for preparing the relation curve of the load-time of compaction material by proportioning described in the embodiment of the present invention 3 in experimental example 4;
Fig. 2 is the relation curve of the load-time of compaction material prepared of cement mortar proportion scheme routinely in experimental example 4.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail, and to understand content of the present invention better, but the present invention is not limited to following examples.
Compaction material described in following embodiment is prepared by the following method:
1. corresponding raw material is taken by organic composition of consolidating material that excites, stirrer is added to by the order of inorganic hybrid materials (zeolite wherein, gypsum and sodium sulfate are crushed to corresponding requirements respectively), polystyrene, Tetra hydro Phthalic anhydride, stir 15 minutes, sealed storage after taking out;
2. take corresponding raw material by the composition of structural foam, be placed in stirrer and stir 10 minutes, sealed storage after taking out;
3. excite consolidating material and structural foam to be placed in stirrer by proportioning to stir 10 minutes, obtain compound by organic before use;
4. in gained compound, add the retardant of proportional quantity, water repellent agent and activator, stir 10 minutes and get final product.
Embodiment 1
For administering the compaction material of karst ground subsidence, be made up of organic consolidating material, structural foam, retardant, water repellent agent and activator of exciting, wherein:
Described organic consolidating material that excites is made up of inorganic hybrid materials, polystyrene and the Tetra hydro Phthalic anhydride weight ratio by 1:2.5:3.5, and described inorganic hybrid materials is made up of zeolite, gypsum and the sodium sulfate weight ratio by 1:1:1;
Described structural foam is made up of by the weight ratio of 1:2.5 urea formaldehyde and urethane;
Described organic weight ratio of consolidating material and structural foam that excites is 1:3.5;
Described retardant is sodium-chlor, and its consumption is account for compaction material gross weight 0.001%;
Described water repellent agent is SUP-202 single-liquid type hydrophobic polyurethane injection slurry, and its consumption is account for compaction material gross weight 0.003%;
Described activator is acetylene alcohol, and its consumption is account for compaction material gross weight 0.002%.
Embodiment 2
For administering the compaction material of karst ground subsidence, be made up of organic consolidating material, structural foam, retardant, water repellent agent and activator of exciting, wherein:
Described organic consolidating material that excites is made up of inorganic hybrid materials, polystyrene and the Tetra hydro Phthalic anhydride weight ratio by 1:3.0:3.5, and described inorganic hybrid materials is made up of zeolite, gypsum and the sodium sulfate weight ratio by 1:1:1;
Described structural foam is made up of by the weight ratio of 1:2.6 urea formaldehyde and urethane;
Described organic weight ratio of consolidating material and structural foam that excites is 1:3.1;
Described retardant is sodium-chlor, and its consumption is account for compaction material gross weight 0.002%;
Described water repellent agent is SUP-202 single-liquid type hydrophobic polyurethane injection slurry, and its consumption is account for compaction material gross weight 0.001%;
Described activator is acetylene alcohol, and its consumption is account for compaction material gross weight 0.001%.
Embodiment 3
For administering the compaction material of karst ground subsidence, be made up of organic consolidating material, structural foam, retardant, water repellent agent and activator of exciting, wherein:
Described organic consolidating material that excites is made up of inorganic hybrid materials, polystyrene and the Tetra hydro Phthalic anhydride weight ratio by 1:3.0:2.0, and described inorganic hybrid materials is made up of zeolite, gypsum and the sodium sulfate weight ratio by 1:1:1;
Described structural foam is made up of by the weight ratio of 1:3.5 urea formaldehyde and urethane;
Described organic weight ratio of consolidating material and structural foam that excites is 1:2.6;
Described retardant is Sodium Tetraborate, and its consumption is account for compaction material gross weight 0.003%;
Described water repellent agent is SL-669 single-liquid type PU foaming water repellent agent, and its consumption is account for compaction material gross weight 0.002%;
Described activator is phenyl ether, and its consumption is account for compaction material gross weight 0.003%.
Embodiment 4
For administering the compaction material of karst ground subsidence, be made up of organic consolidating material, structural foam, retardant, water repellent agent and activator of exciting, wherein:
Described organic consolidating material that excites is made up of inorganic hybrid materials, polystyrene and the Tetra hydro Phthalic anhydride weight ratio by 1:1.5:4.9, and described inorganic hybrid materials is made up of zeolite, gypsum and the sodium sulfate weight ratio by 1:1:1;
Described structural foam is made up of by the weight ratio of 1:2.3 urea formaldehyde and urethane;
Described organic weight ratio of consolidating material and structural foam that excites is 1:3.8;
Described retardant is sodium sulfate, and its consumption is account for compaction material gross weight 0.002%;
Described water repellent agent is SL-668 single-liquid type PU foaming water repellent agent, and its consumption is account for compaction material gross weight 0.001%;
Described activator is dme, and its consumption is account for compaction material gross weight 0.003%.
Embodiment 5
For administering the compaction material of karst ground subsidence, be made up of organic consolidating material, structural foam, retardant, water repellent agent and activator of exciting, wherein:
Described organic consolidating material that excites is made up of inorganic hybrid materials, polystyrene and the Tetra hydro Phthalic anhydride weight ratio by 1:3.5:2.8, and described inorganic hybrid materials is made up of zeolite, gypsum and the sodium sulfate weight ratio by 1:1:1;
Described structural foam is made up of by the weight ratio of 1:3.0 urea formaldehyde and urethane;
Described organic weight ratio of consolidating material and structural foam that excites is 1:2.5;
Described retardant is magnesium sulfate, and its consumption is account for compaction material gross weight 0.001%;
Described water repellent agent is SUP-202 single-liquid type hydrophobic polyurethane injection slurry, and its consumption is account for compaction material gross weight 0.001%;
Described activator is acetylene alcohol, and its consumption is account for compaction material gross weight 0.001%.
Experimental example 1: filling effect is tested
Adopt two schemes to carry out filling to the underground karst cavity of 2 similar sizes in new district, Lingui, Guilin City, wherein the hole diameter of solution cavity 1 is about 3.2m, the dark 4.5m in hole, and the buried depth on distance ground, hole is about 7m; The hole diameter of solution cavity 2 is about 3.08m, the dark 5.1m in hole, and the buried depth on distance ground, hole is about 6.8m.
The first scheme adopts traditional cement mortar charging formula, mix proportion scheme be routinely water: cement: sand=1:2.3:2.5 (weight ratio).Adopt high-pressure grout injector to carry out slip casting to solution cavity 1, operate according to associated construction specification, be full of and detect after reaching cement conservation length of time.
First scheme is carry out filling by the compaction material that the embodiment of the present invention 1 is obtained to solution cavity 2, QZJ100B drilling machine is adopted to intend administering solution cavity boring to soil, dip angle of hole 35 °, borehole diameter 20cm, adopt BW-118 high-pressure grout injector that mixed solution is injected solution cavity, grouting pressure is 0.3MPa, reaches pressure high limit value 3MPa and namely stops slip casting.
Within 28 days, adopt the slip casting effect of SIR-2 type geologic radar detection instrument to two schemes to detect afterwards, result is as follows:
The physical prospecting detected result display of the first scheme: the packing fraction of solution cavity is only 40%, and filling is uneven, and wall gummed in hole is poor, and sand-cement slurry materials are large;
First scheme detected result display: the packing fraction of solution cavity reaches 100%, compaction material and hole wall adhesion effect good, because compaction material has swelling property, filling materials are less relative to sand-cement slurry.
Experimental example 2: permeability test
The present invention program: prepare compaction material by proportioning described in the embodiment of the present invention 1, then make 200cm × 200cm standard test block, makes 5 pieces.
Cement mortar proportion scheme: water routinely: cement: sand=1:2.3:2.5 (weight ratio), uses the same method and sand-cement slurry is made 200cm × 200cm standard test block, make 5 pieces, and preparation process does not need to stir.
Two kinds of sample maintenances, after 28 days, adopt YT020 type water-permeable tester to carry out water permeabillity test, measure its coefficient of permeability K.
Result shows: the test block coefficient of permeability K that sand-cement slurry is made is 0.013 ~ 0.024, belongs to weak water-permeable; The test block coefficient of permeability K made by the embodiment of the present invention 1 proportioning is 0.618 ~ 0.84.Visible, compaction material of the present invention has good water-permeable, can not impact the footpath flow path direction of underground water
Experimental example 3: cementing argillization test
Cement mortar proportion scheme: by water: cement: sand=1:2.3:2.5 (weight ratio).By sand-cement slurry: clay=1:1 (weight ratio) is mixed with test block, place hose testing after 48 hours.
The present invention program: prepare compaction material, then by compaction material mixture by proportioning described in the embodiment of the present invention 2: earth=1:1 (weight ratio) is mixed with test block, places hose testing test after 48 hours.
Result shows: cement mortar block is under identical time, identical current are washed away, and clay comes off and reaches 80%; And clay comes off and is only 3.5% on compaction material of the present invention.Visible, the cementing argillization successful of compaction material of the present invention is better than sand-cement slurry.
Experimental example 4: fatigue resistance is tested
The present invention program: prepare compaction material by proportioning described in the embodiment of the present invention 3, then make 150cm × 150cm standard test block, makes 5 pieces.
Cement mortar proportion scheme: water routinely: cement: sand=1:2.1:2.0 (weight ratio).Use the same method and sand-cement slurry made 150cm × 150cm standard test block, make 5 pieces, preparation process does not need to stir.
Two kinds of sample maintenances, after 28 days, adopt SPL-30A type protracted test machine to add Cyclic Loading, differentiate its fatigue resistance according to the relation curve of load-time; Wherein Fig. 1 is for preparing the relation curve of the load-time of compaction material by proportioning described in the embodiment of the present invention 3, and Fig. 2 is the relation curve of the load-time of the compaction material prepared by above-mentioned cement mortar proportion scheme.
Result shows: the relation curve of the test block load-time be made up of sand-cement slurry, and cement briquette is after two round load tests, and test block is broken, and intensity obviously reduces; And the test block that compaction material of the present invention is made is after 8 round load tests, only there is slight drawing crack on surface, and globality and the intensity of test block do not become substantially.
Experimental example 5: impact resistance test
The present invention program: prepare compaction material by proportioning described in the embodiment of the present invention 3, then make 250cm × 250cm standard test block, makes 5 pieces.
Cement mortar proportion scheme: routinely water: cement: sand=1:2.5:2.0 (weight ratio).Use the same method and sand-cement slurry made 250cm × 250cm standard test block, make 5 pieces, preparation process does not need to stir.
Two kinds of sample maintenances, after 28 days, adopt the full-automatic shock-testing machine of JB-30A computer on-screen to add shock load load, differentiate its shock resistance according to display screen anti-impact force size.
Result shows: shown by JB-30A computer on-screen full-automatic shock-testing machine screen display impact force data, the test block anti-impact force size that sand-cement slurry is made is 3.5KN; And the test block impact resistance size that compaction material of the present invention is made is 4.1KN; Its shock resistance is slightly better than sand-cement slurry, meets the requirement of strength of compaction material.
From above-mentioned test, compaction material of the present invention is applied in the measure of administering karst ground subsidence geologic hazard solution cavity, obviously can reach the stabilized soil pavement requirement of filling, can ensure that administering groundwork basis has excellent specific rigidity, specific tenacity, the rigidity of base integral can be improved again, what is more important can not cause the environmental pollution in groundwater flow process, significantly can reduce the expense of improvement.
Claims (10)
1. for administering a compaction material for karst ground subsidence, it is characterized in that: it excites consolidating material and structural foam composition primarily of organic, wherein:
Described organic consolidating material that excites is made up of inorganic hybrid materials, polystyrene and the Tetra hydro Phthalic anhydride weight ratio by 1:1.5 ~ 3.5:2.8 ~ 4.9, and wherein said inorganic hybrid materials is made up of zeolite, gypsum and the sodium sulfate weight ratio by 1:1:1;
Described structural foam is made up of by the weight ratio of 1:2.3 ~ 3.5 urea formaldehyde and urethane;
Described organic weight ratio of consolidating material and structural foam that excites is 1:2.5 ~ 3.8.
2. the compaction material for administering karst ground subsidence according to claim 1, is characterized in that: described compaction material also comprises retardant, water repellent agent and activator.
3. the compaction material for administering karst ground subsidence according to claim 2, is characterized in that: the consumption of described retardant is account for compaction material gross weight 0.001 ~ 0.003%.
4. the compaction material for administering karst ground subsidence according to claim 2, is characterized in that: described retardant is sodium-chlor.
5. the compaction material for administering karst ground subsidence according to claim 2, is characterized in that: the consumption of described water repellent agent is account for compaction material gross weight 0.001 ~ 0.003%.
6. the compaction material for administering karst ground subsidence according to claim 2, is characterized in that: described water repellent agent is hydrophobic polyurethane injection slurry.
7. the compaction material for administering karst ground subsidence according to claim 2, is characterized in that: the consumption of described activator is account for compaction material gross weight 0.001 ~ 0.003%.
8. the compaction material for administering karst ground subsidence according to claim 2, is characterized in that: described activator is acetylene alcohol or ether material.
9. the compaction material for administering karst ground subsidence according to any one of claim 1 ~ 8, it is characterized in that: describedly organicly excite in the composition of consolidating material, the weight ratio of inorganic hybrid materials, polystyrene and Tetra hydro Phthalic anhydride is 1:2.0 ~ 3.0:3.2 ~ 4.4.
10. the preparation method of the compaction material for administering karst ground subsidence according to claim 1, comprises the following steps:
1. take corresponding raw material by organic composition of consolidating material that excites, be added to stirrer by the order of inorganic hybrid materials, polystyrene, Tetra hydro Phthalic anhydride, stir 10 ~ 15 minutes, sealed storage after taking out;
2. take corresponding raw material by the composition of structural foam, be placed in stirrer and stir 10 ~ 15 minutes, sealed storage after taking out;
3. excite consolidating material and structural foam to be placed in stirrer by proportioning to stir, obtain compound by organic before use.
4. in gained compound, add the retardant of proportional quantity, water repellent agent and activator, can use after mixing.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107064460A (en) * | 2017-04-14 | 2017-08-18 | 桂林理工大学 | A kind of model of indoor karst vacuum collapse |
| CN111574180A (en) * | 2020-05-28 | 2020-08-25 | 贵州大学 | Underground backfill material suitable for karst region and preparation method thereof |
| CN113372067A (en) * | 2021-07-07 | 2021-09-10 | 华邦建投集团股份有限公司 | Fast-curing pile foundation karst cave backfill and preparation method thereof |
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| CN101121581A (en) * | 2007-07-09 | 2008-02-13 | 王月琴 | Glue powder polyphenyl granule external wall thermal insulation powdery material |
| CN102167546A (en) * | 2010-12-13 | 2011-08-31 | 广东龙湖科技有限公司 | Zeolite-like lightweight heat preservation and sound insulation board and production method thereof |
| CN102701671A (en) * | 2012-05-25 | 2012-10-03 | 徐州中国矿大岩土工程新技术发展有限公司 | High-content coal ash foam filling body and preparation method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH07206503A (en) * | 1994-01-19 | 1995-08-08 | Penta Ocean Constr Co Ltd | Back-filling material and shield process using the same |
| CN101121581A (en) * | 2007-07-09 | 2008-02-13 | 王月琴 | Glue powder polyphenyl granule external wall thermal insulation powdery material |
| CN102167546A (en) * | 2010-12-13 | 2011-08-31 | 广东龙湖科技有限公司 | Zeolite-like lightweight heat preservation and sound insulation board and production method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107064460A (en) * | 2017-04-14 | 2017-08-18 | 桂林理工大学 | A kind of model of indoor karst vacuum collapse |
| CN111574180A (en) * | 2020-05-28 | 2020-08-25 | 贵州大学 | Underground backfill material suitable for karst region and preparation method thereof |
| CN113372067A (en) * | 2021-07-07 | 2021-09-10 | 华邦建投集团股份有限公司 | Fast-curing pile foundation karst cave backfill and preparation method thereof |
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| CN104446208B (en) | 2016-05-25 |
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