CN110117954A - A kind of soft soil foundation compounding method - Google Patents
A kind of soft soil foundation compounding method Download PDFInfo
- Publication number
- CN110117954A CN110117954A CN201910239205.8A CN201910239205A CN110117954A CN 110117954 A CN110117954 A CN 110117954A CN 201910239205 A CN201910239205 A CN 201910239205A CN 110117954 A CN110117954 A CN 110117954A
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- China
- Prior art keywords
- parts
- raw material
- weight
- floral tube
- soft soil
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
-
- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00732—Uses not provided for elsewhere in C04B2111/00 for soil stabilisation
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/0023—Slurry
Abstract
The invention discloses a kind of soft soil foundation compounding methods comprising following steps: step 1, using mechanical hole building, grouting floral tube is put into after pore-forming；Step 2, the hole between grouting floral tube and soil layer is filled with mortar；Step 3, it seals, is in the milk between floral tube and soil layer under earth's surface certain depth and is packed into certain clay；Step 4, hardening slurry is configured；Step 5, it is in the milk, by configured hardening slurry by being poured into grouting floral tube；According to parts by weight, hardening slurry raw material includes following components: 65-80 parts of cement；70-80 parts of waterglass；3-5 parts of alum；80-100 parts of water.It reacts the invention has the following advantages: alum can hydrolyze the hydroxide ion generated with sodium metasilicate and generates precipitating, to destroy the hydrolysising balance of sodium metasilicate, the generation of silicic acid is also further speeded up simultaneously, further destroy the hydrolysis of tricalcium silicate, the production quantity of afwillite is increased, solidification effect is effectively increased.
Description
Technical field
The present invention relates to method for processing foundation, more specifically, it relates to a kind of soft soil foundation compounding method.
Background technique
Mud soil property, soft clay, collapsible loess foundation are usually collectively referred to as soft soil foundation by us, if as building
Ground, need to handle mostly, otherwise will generate different degrees of sliding or sedimentation of collapsing.
The common processing method of soft soil foundation includes following items: cushion, draining concretion method, TGXG method, compacted
Stake method, vibroflotation, slurry filling method for strengthening etc..
Wherein, slurry filling method for strengthening is usually that the hole to bury and gap is perfused by Grouting Pipe in the slurries of compacted soil
In, by the cementing of slurries or solidification, enhance the connection between loose ground intergranular or the soil body, to improve the intensity of ground to reduce
Sedimentation.
Cement-silicate slurries used by traditional slurry filling method for strengthening have that knot solid structure is unstable,
Cause the later period to generate disintegration phenomenon, has much room for improvement.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of soft soil foundation compounding method,
Have the advantages that stability is high.
To achieve the above object, the present invention provides the following technical scheme that
A kind of soft soil foundation compounding method, includes the following steps,
Step 1, using mechanical hole building, grouting floral tube is put into after pore-forming；
Step 2, the hole between grouting floral tube and soil layer is filled with mortar；
Step 3, it seals, is in the milk between floral tube and soil layer under earth's surface certain depth and is packed into certain clay；
Step 4, hardening slurry is configured；
Step 5, it is in the milk, by configured hardening slurry by being poured into grouting floral tube；
According to parts by weight, the hardening slurry raw material includes following components:
65-80 parts of cement；
70-80 parts of waterglass；
3-5 parts of alum；
80-100 parts of water.
By using above-mentioned technical proposal, waterglass is the aqueous solution of sodium metasilicate, has intense hydrolysis simultaneously in aqueous solution
Reach hydrolysising balance, sodium metasilicate hydrolysis generates the silicic acid for being insoluble in water and makes aqueous solution in alkalinity.After water is added in cement, water
The hydration reaction that mud mineral occur is mainly the hydrolysis of tricalcium silicate.After waterglass is added in cement slurry, waterglass water
The calcium hydroxide reaction for solving the silicic acid generated and cement minerals hydrolysis generation generates the afwillite for being insoluble in water, destroys silicon
The hydrolysising balance of sour tricalcium and dicalcium silicate promotes hydrolysis, is allowed to generate a large amount of afwillite in a short period of time
And Seed harvest is condensed into, and then reach quick-setting effect.
In addition, waterglass and cement slurry all have the property of colloid, and the electrically charged property of colloidal particles institute is on the contrary, after mixing
Occur electrically to neutralize and colloidal particles is promoted to condense.
Wherein, alum can hydrolyze the hydroxide ion generated with sodium metasilicate and react and generate precipitating, to destroy
The hydrolysising balance of sodium metasilicate, while the generation of silicic acid is also further speeded up, the hydrolysis of tricalcium silicate is further destroyed, water is increased
The production quantity for closing calcium silicates, effectively increases solidification effect.
Further, according to parts by weight, the hardening slurry raw material includes following components:
75-80 parts of cement；
70-75 parts of waterglass；
4-5 parts of alum；
90-100 parts of water.
Further, according to parts by weight, the solidification slurry raw material includes 20-25 parts of closed perlite.
By using above-mentioned technical proposal, due to there are a large amount of hole between the soil body, so that inside soil body and leakiness, from
And the intensity of the soil body is affected, and closed perlite is added in cement, since closed perlite has biggish specific surface area,
Middle a part of active higher substance and hydrolysis product of cement chemically react, and generate gelatinous mass afwillite, tool
There is very strong cementing properties, the substance inside soil cement can be made closely to link together, the inactive closed pore of another part is precious
Zhu Yan due to partial size very little, can a part of hole in filling concrete stone skeleton so that internal structure closely connects
At stable entirety.
In addition, the main comprise material of closed perlite is silica, it is unstable that silica reacts generation with water
Metasilicic acid, the cation that metasilicic acid ionizes out can be attracted by the anion in soil particle, be wrapped near soil particle, increase
Cohesive force between soil particle enhances the intensity of the soil body, plays indirect cementation.
Further, according to parts by weight, the solidification slurry raw material includes 3-5 parts of calcium gluconate.
By using above-mentioned technical proposal, calcium gluconate has good deferred action, can alleviate setting time, have
Conducive to the uniform mixing of system, with waterglass-cement system coagulation result, to guarantee later strength.In addition, calcium gluconate
The calcium ion that middle reaches separate out can hydrolyze the hydroxide ion generated with sodium metasilicate and react to form calcium hydroxide, promote silicic acid
While sodium hydrolyzes, additionally it is possible to further the reaction of silicic acid and calcium hydroxide be promoted effectively to break water to generate afwillite
Solution balance, effectively improves solidification effect.
Further, according to parts by weight, the solidification slurry raw material includes 0.3-0.5 parts of polyvinyl alcohol.
By using above-mentioned technical proposal, polyvinyl alcohol can with cement-silicate gel-forming interpenetrating polymer networks,
The webbed rock-steady structure of structure makes gel have better cohesive force, toughness, durability and resist erodible.
Further, according to parts by weight, the solidification slurry raw material includes 0.5-1 parts of calcium lignosulfonate.
By using above-mentioned technical proposal, calcium lignosulfonate can be used as water-reducing agent, and water during mixing and stirring is effectively reduced
Dosage and improve the uniform mixing of system, to improve solidification effect.Meanwhile calcium lignosulfonate can also dissociate out calcium from
Son breaks waterglass-cement hydrolysising balance, to further increase solidification effect.
Further, according to parts by weight, the solidification slurry raw material includes 1-2 parts of formamide.
By using above-mentioned technical proposal, formamide have splendid solvability, can effectively by most of component into
Row dissolves and keeps its evenly dispersed, while formamide can improve the mobility of afwillite to a certain extent, make its water
Close calcium silicates has more stable structure after hardening, reduces porosity.As calcium hydroxide and silicic acid are continuously generated hydration
Calcium silicates and water, formamide are highly soluble in water, and with being continuously generated for dampening, formamide is extracted by water and is detached from waterglass-cement
Gel rubber system to reduce the mobility of system and be greatly enhanced in viscosity, and also can in setting rate
It is promoted, finally obtains stable solid structure.
In conclusion the invention has the following advantages:
1. waterglass is the aqueous solution of sodium metasilicate, there is intense hydrolysis in aqueous solution and reach hydrolysising balance, sodium metasilicate hydrolysis
It generates the silicic acid for being insoluble in water and makes aqueous solution in alkalinity.After water is added in cement, the hydration reaction master of cement minerals generation
If the hydrolysis of tricalcium silicate.After waterglass is added in cement slurry, silicic acid and cement minerals that waterglass hydrolysis generates
The calcium hydroxide reaction that hydrolysis generates generates the afwillite for being insoluble in water, destroys the hydrolysis of tricalcium silicate and dicalcium silicate
Balance, promotes hydrolysis, is allowed to generate a large amount of afwillite in a short period of time and condense into Seed harvest, and then reach
Quick-setting effect, waterglass and cement slurry all have the property of colloid, and the electrically charged property of colloidal particles institute is on the contrary, mixing
Occur electrically to neutralize and colloidal particles is promoted to condense afterwards；
2. alum can hydrolyze the hydroxide ion generated with sodium metasilicate and react and generate precipitating, to destroy sodium metasilicate
Hydrolysising balance, while the generation of silicic acid is also further speeded up, the hydrolysis of tricalcium silicate is further destroyed, afwillite is increased
Production quantity, effectively increase solidification effect；
3. closed perlite has biggish specific surface area, the higher substance of a portion activity and hydrolysis product of cement occur
Chemical reaction, generating gelatinous mass afwillite can make the substance inside soil cement close with very strong cementing properties
Link together, the inactive closed perlite of another part due to partial size very little, can in filling concrete stone skeleton one
Part hole, so that internal structure closely connects into stable entirety；
4. calcium gluconate has good deferred action, setting time can be alleviated, be conducive to the uniform mixing of system, with water
Glass-cement system coagulation result, to guarantee later strength.In addition, the calcium ion that separates out of calcium gluconate middle reaches can be with
The hydroxide ion that sodium metasilicate hydrolysis generates reacts to form calcium hydroxide, while promoting sodium metasilicate hydrolysis, additionally it is possible into
One step promotes the reaction of silicic acid and calcium hydroxide effectively to break hydrolysising balance to generate afwillite, effectively improves solidification effect
Fruit；
5. polyvinyl alcohol can make to coagulate with cement-silicate gel-forming interpenetrating polymer networks, the webbed rock-steady structure of structure
Glue has better cohesive force, toughness, durability and resists erodible；
6. calcium lignosulfonate can be used as water-reducing agent, the dosage of water during mixing and stirring is effectively reduced and improves mixing and stirring for system
Even property, to improve solidification effect.Meanwhile the calcium lignosulfonate calcium ion out that can also dissociate breaks the hydrolysis of waterglass-cement
Balance, to further increase solidification effect；
7. formamide has splendid solvability, effectively most of component can be dissolved and keep its evenly dispersed, together
When formamide can improve the mobility of afwillite to a certain extent, make its afwillite after hardening and have and is more steady
Fixed structure, reduces porosity.As calcium hydroxide and silicic acid are continuously generated afwillite and water, formamide is highly soluble in
Water, with being continuously generated for dampening, formamide is extracted by water and is detached from waterglass-cement gel system, to reduce the stream of system
Dynamic property is simultaneously greatly enhanced in viscosity, and can also be promoted in setting rate, and stable consolidate finally is obtained
Body structure.
Detailed description of the invention
Fig. 1 is the flow chart of method provided by the invention.
Specific embodiment
Below in conjunction with attached drawing 1 and embodiment, invention is further described in detail.
Embodiment
Embodiment 1
A kind of soft soil foundation compounding method, comprising the following steps:
Step 1, using mechanical hole building, grouting floral tube is put into after pore-forming；
Step 2, the hole between grouting floral tube and soil layer is filled with mortar；
Step 3, it seals, is in the milk between floral tube and soil layer under earth's surface certain depth and is packed into certain clay；
Step 4, hardening slurry is configured；
Step 5, it is in the milk, by configured hardening slurry by being poured into grouting floral tube.
Wherein, according to parts by weight, hardening slurry raw material components are as shown in table 1, the preparation method of hardening slurry include with
Lower step:
Step 1, water, alum, calcium gluconate, polyvinyl alcohol and calcium lignosulfonate are thoroughly mixed；
Step 2, continue to put into cement, waterglass (sodium silicate), closed perlite, and uniform mixing；
Step 3, it is eventually adding formamide and stirs evenly and come into operation.
Embodiment 2
The difference from embodiment 1 is that according to parts by weight, hardening slurry raw material components are as shown in table 1.
Comparative example
Comparative example 1
The difference from embodiment 1 is that according to parts by weight, hardening slurry raw material components are as shown in table 1.
Comparative example 2
Difference with comparative example 1 is that according to parts by weight, hardening slurry raw material components are as shown in table 1.
Comparative example 3
The difference from embodiment 1 is that according to parts by weight, hardening slurry raw material components are as shown in table 1.
Comparative example 4
Difference with comparative example 3 is that according to parts by weight, hardening slurry raw material components are as shown in table 1.
Comparative example 5
The difference from embodiment 1 is that according to parts by weight, hardening slurry raw material components are as shown in table 1.
Comparative example 6
Difference with comparative example 5 is that according to parts by weight, hardening slurry raw material components are as shown in table 1.
Comparative example 7
The difference from embodiment 1 is that according to parts by weight, hardening slurry raw material components are as shown in table 1.
Comparative example 8
Difference with comparative example 7 is that according to parts by weight, hardening slurry raw material components are as shown in table 1.
Comparative example 9
The difference from embodiment 1 is that according to parts by weight, hardening slurry raw material components are as shown in table 1.
Comparative example 10
Difference with comparative example 9 is that according to parts by weight, hardening slurry raw material components are as shown in table 1.
Comparative example 11
The difference from embodiment 1 is that according to parts by weight, hardening slurry raw material components are as shown in table 1.
Comparative example 12
Difference with comparative example 11 is that according to parts by weight, hardening slurry raw material components are as shown in table 1.
Performance detection test
Intensity test: referring to GB/T 50081-2002 " standard for test methods of mechanical properties of ordinary concrete " to sample into
The measurement of row compressive property.
Table 1
| Embodiment 1 | Embodiment 2 | Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 | Comparative example 5 | |
| Cement | 70 | 75 | 65 | 80 | 75 | 75 | 70 |
| Waterglass | 75 | 70 | 75 | 70 | 75 | 80 | 75 |
| Alum | 4 | 4 | 0 | 0 | 5 | 3 | 5 |
| Water | 90 | 90 | 100 | 90 | 80 | 90 | 90 |
| Closed perlite | 24 | 23 | 23 | 22 | 0 | 0 | 25 |
| Calcium gluconate | 4 | 4 | 3 | 5 | 4 | 3 | 0 |
| Polyvinyl alcohol | 0.4 | 0.4 | 0.3 | 0.5 | 0.4 | 0.3 | 0.4 |
| Calcium lignosulfonate | 0.6 | 0.5 | 0.7 | 1 | 0.8 | 0.7 | 0.9 |
| Formamide | 1 | 1 | 2 | 1 | 2 | 2 | 1 |
| 7d compression strength | 14.3MPa | 14.2MPa | 12.3MPa | 12.5MPa | 11.2MPa | 11.0MPa | 14.0MPa |
| 14d compression strength | 19.6MPa | 19.4MPa | 17.5MPa | 17.6MPa | 16.4MPa | 16.2MPa | 19.1MPa |
Table 1- is continuous
| Comparative example 6 | Comparative example 7 | Comparative example 8 | Comparative example 9 | Comparative example 10 | Comparative example 11 | Comparative example 12 | |
| Cement | 80 | 80 | 80 | 75 | 65 | 75 | 70 |
| Waterglass | 75 | 70 | 70 | 75 | 80 | 70 | 75 |
| Alum | 4 | 4 | 5 | 4 | 5 | 3 | 4 |
| Water | 100 | 80 | 90 | 90 | 100 | 90 | 80 |
| Closed perlite | 23 | 20 | 21 | 24 | 22 | 25 | 23 |
| Calcium gluconate | 0 | 5 | 5 | 4 | 3 | 4 | 4 |
| Polyvinyl alcohol | 0.5 | 0 | 0 | 0.4 | 0.3 | 0.4 | 0.4 |
| Calcium lignosulfonate | 0.6 | 0.8 | 0.7 | 0 | 0 | 0.9 | 0.7 |
| Formamide | 2 | 1 | 2 | 2 | 1 | 0 | 0 |
| 7d compression strength | 14.1MPa | 13.2MPa | 13.3MPa | 13.6MPa | 13.8MPa | 12.5MPa | 12.7MPa |
| 14d compression strength | 19.2MPa | 18.1MPa | 18.1MPa | 18.8MPa | 18.7MPa | 17.3MPa | 17.4MPa |
This specific embodiment is only explanation of the invention, is not limitation of the present invention, and those skilled in the art exist
It can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as in the present invention
Scope of the claims in all by the protection of Patent Law.
Claims (7)
1. a kind of soft soil foundation compounding method, it is characterised in that: include the following steps,
Step 1, using mechanical hole building, grouting floral tube is put into after pore-forming；
Step 2, the hole between grouting floral tube and soil layer is filled with mortar；
Step 3, it seals, is in the milk between floral tube and soil layer under earth's surface certain depth and is packed into certain clay；
Step 4, hardening slurry is configured；
Step 5, it is in the milk, by configured hardening slurry by being poured into grouting floral tube；
According to parts by weight, the hardening slurry raw material includes following components:
65-80 parts of cement；
70-80 parts of waterglass；
3-5 parts of alum；
80-100 parts of water.
2. a kind of soft soil foundation compounding method according to claim 1, it is characterised in that: according to parts by weight, institute
Stating hardening slurry raw material includes following components:
75-80 parts of cement；
70-75 parts of waterglass；
4-5 parts of alum；
90-100 parts of water.
3. a kind of soft soil foundation compounding method according to claim 1, it is characterised in that: according to parts by weight, institute
Stating solidification slurry raw material includes 20-25 parts of closed perlite.
4. a kind of soft soil foundation compounding method according to claim 1, it is characterised in that: according to parts by weight, institute
Stating solidification slurry raw material includes 3-5 parts of calcium gluconate.
5. a kind of soft soil foundation compounding method according to claim 1, it is characterised in that: according to parts by weight, institute
Stating solidification slurry raw material includes 0.3-0.5 parts of polyvinyl alcohol.
6. a kind of soft soil foundation compounding method according to claim 1, it is characterised in that: according to parts by weight, institute
Stating solidification slurry raw material includes 0.5-1 parts of calcium lignosulfonate.
7. a kind of soft soil foundation compounding method according to claim 1, it is characterised in that: according to parts by weight, institute
Stating solidification slurry raw material includes 1-2 parts of formamide.
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| CN201910239205.8A CN110117954A (en) | 2019-03-27 | 2019-03-27 | A kind of soft soil foundation compounding method |
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| CN201910239205.8A CN110117954A (en) | 2019-03-27 | 2019-03-27 | A kind of soft soil foundation compounding method |
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| CN110117954A true CN110117954A (en) | 2019-08-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111233430A (en) * | 2020-01-20 | 2020-06-05 | 石河子大学 | Method for modifying raw soil by using cementing material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111233430A (en) * | 2020-01-20 | 2020-06-05 | 石河子大学 | Method for modifying raw soil by using cementing material |
| CN111233430B (en) * | 2020-01-20 | 2022-01-04 | 石河子大学 | Method for modifying raw soil by using cementing material |
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