CN101265059A - Low-viscosity high-permeation solution type grouting material - Google Patents
Low-viscosity high-permeation solution type grouting material Download PDFInfo
- Publication number
- CN101265059A CN101265059A CNA2008100495314A CN200810049531A CN101265059A CN 101265059 A CN101265059 A CN 101265059A CN A2008100495314 A CNA2008100495314 A CN A2008100495314A CN 200810049531 A CN200810049531 A CN 200810049531A CN 101265059 A CN101265059 A CN 101265059A
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- CN
- China
- Prior art keywords
- water glass
- grouting material
- type grouting
- sulfuric acid
- solution type
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- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Lining And Supports For Tunnels (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention belongs to a process of reinforcement and water plugging of fine sand layer in tunnel and underground constructions. The invention provides a solution-type grouting material with low viscosity and high permeability, which is made from water glass of 20 Be' and sulfuric acid of 15% concentration, by adding water glass into sulfuric acid and maintaining pH of the resulting mixture at 5. The inventive solution-type grouting material is characterized by low viscosity and high permeability. Experiments and tests in tunnel and underground constructions proved that the solution-type grouting material is ideal in diffusion effect and gelation time in sand.
Description
Technical field
The invention belongs to the reinforcing and the water-plugging technique of fine sand layer in tunnel and the underground works, mainly propose a kind of low viscosity, high-permeation solution type grouting material.
Background technology
Fine sand layer in tunnel and the underground works mostly is discontinuous fine-grannular and comes across in the stratum, and is light yellow, in thick, uniform particles, fine and close nothing is glued, no self-stable ability, easily cave in during excavation, in order to guarantee construction safety, stratum consolidation and shutoff method commonly used both at home and abroad at present are slip casting method.Slip casting method is exactly by certain pressure a certain amount of gelling material to be injected the rock stratum or the soil body, make that it flows in formation fractures or soil body space, diffusion, filling, fixed, be formed with the adhesive bond of certain intensity and low permeability, strengthening stratum, shutoff underground water, thereby improve the self stabilization time of country rock, guarantee excavation safety.Injecting paste material commonly used has: cement plasmoid humor (comprising single liquid grout, cement-sodium silicate slurry), water glass-calcium chloride slurries, water glass-sodium aluminate pulp, resene slurries and third rare amides slurries, wooden amine slurries.Because the fine sand layer structure is dense, general granule type injecting paste material is difficult to annotate, injecting paste material must have certain fineness, and viscosity is low, and so good penetrability is because the cement plasmoid is a particulate material, fineness is not enough, viscosity and perviousness are difficult to reach, and are difficult to inject in fine sand layer, can not adopt; Water glass-calcium chloride slurries need replace slip casting, and technology is complicated; Water glass-sodium aluminate pulp, because of sodium aluminate does not belong to finished industrial product, the no source of goods can not adopt; Resene slurries and third rare amides slurries, the material cost is too high, so can only use on a small quantity; Wood amine slurries exist the toxic pollutant problem, can not adopt.Water glass is used early as injecting paste material, and development at home and abroad is very fast at present.Water glass claims to steep colored alkali again, and its major ingredient is a water glass, and it has solid and two kinds of products of solution, and grouting water glass is a kind of grey blue thick liquid.With water glass is the slurries of host, and kind is a lot, but can be divided into alkaline water glass pulp and acidic water glass slurries substantially.Alkaline water glass, because the solution-off of sodium ion, induration is very easily defeated and dispersed, not only consolidated sand strength is low, and has the stripping of intensive alkali, causes the alkaline pollution of environment.Acid ripples from, because polymkeric substance journey silicic acid form exists, consolidated sand strength height not only, and also water insoluble, stable performance, under similarity condition, it is higher 5～10 times than alkaline water glass consolidated sand strength, is a kind of ideal slurry material of generally acknowledging both at home and abroad at present, though general acidic water glass gel time in air is very long, but behind the injection sand body, very supergrip does not often reach the range of scatter of expectation.
Therefore the slip casting in fine sand layer will solve the slip casting problem in the fine sand layer, reaches slip casting effect preferably, must the research excellent property, the injecting paste material of cheap, nontoxic pollution-free.
Summary of the invention
Purpose of the present invention promptly is to propose a kind of low viscosity, high-permeation solution type grouting material, makes it be suitable for the reinforcing water blockoff of fine sand layer in tunnel and the underground works.
The component of injecting paste material proposed by the invention and proportioning are: degree Beaume is the water glass of 20 Be ', and concentration is 15% sulfuric acid, water glass is joined in the sulfuric acid to adjust pH value be 5.
The preparation of injecting paste material of the present invention is that to join water glass (being water glass) in the sulfuric acid and adjust pH value be 5, that is: Na
2OnSiO
2+ H
2SO
4→ Na
2SO
4+ H
2O+nSiO
2H
2O
SiO
2·nH
2SO
4→Si(OH)
2SO
4→SO
4 -2+OH
-+Si
++++
It is acid that slurries are, and its pH value is 5, when injecting paste material runs into Ca in the sand
2CO
3The time, an amount of H
2SO
4Be neutralized into Ca
2SO
4,, generate silicic acid glue precipitation along with pH value is increased to neutrality or produces polyreaction near neutral orthosilicic acid.The pH value of its gelation is 6.5, because slurries are to solidify at middle acidic region, does not contain organism and heavy metal in the slurries, so can stripping acidity or alkaline matter in the gelinite, can not produce acid pollution and other objectionable impurities to soil and underground water.
The solution type grouting material of the present invention preparation has the characteristics of low viscosity and hypertonicity, and the test in repeatedly experiment and tunnel underground works shows, it has comparatively ideal of ideal diffusion effect and the gel time in sand body.
Embodiment
Provide the embodiment of the invention:
Adopting degree Beaume is that the water glass of 20 Be ' and concentration are that 15% sulfuric acid is prepared, and water glass is joined to make the mixing solutions pH value in the sulfuric acid be 5, promptly obtains solution type grouting material of the present invention.
Claims (1)
1, a kind of low viscosity, high-permeation solution type grouting material is characterized in that: adopting degree Beaume is that the water glass of 20Be and concentration are that 15% sulfuric acid is prepared, and it is 5 that water glass is joined the pH value that makes mixing solutions in the sulfuric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100495314A CN101265059A (en) | 2008-04-14 | 2008-04-14 | Low-viscosity high-permeation solution type grouting material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100495314A CN101265059A (en) | 2008-04-14 | 2008-04-14 | Low-viscosity high-permeation solution type grouting material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101265059A true CN101265059A (en) | 2008-09-17 |
Family
ID=39987783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100495314A Pending CN101265059A (en) | 2008-04-14 | 2008-04-14 | Low-viscosity high-permeation solution type grouting material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101265059A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102603220A (en) * | 2012-04-01 | 2012-07-25 | 昌吉市先导工程材料有限责任公司 | Preparation of polymer composite gelling agent for grouting and application method thereof |
| CN105951709A (en) * | 2016-06-07 | 2016-09-21 | 重庆科技学院 | Sand solidification method using temperature effect on salt solubility change |
| CN107382254A (en) * | 2017-08-01 | 2017-11-24 | 中铁工程装备集团技术服务有限公司 | A kind of novel slurry filling material suitable for shield method |
| CN111574181A (en) * | 2020-06-05 | 2020-08-25 | 中国地质科学院矿产综合利用研究所 | Acidic water glass grouting material and preparation method thereof |
-
2008
- 2008-04-14 CN CNA2008100495314A patent/CN101265059A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102603220A (en) * | 2012-04-01 | 2012-07-25 | 昌吉市先导工程材料有限责任公司 | Preparation of polymer composite gelling agent for grouting and application method thereof |
| CN105951709A (en) * | 2016-06-07 | 2016-09-21 | 重庆科技学院 | Sand solidification method using temperature effect on salt solubility change |
| CN107382254A (en) * | 2017-08-01 | 2017-11-24 | 中铁工程装备集团技术服务有限公司 | A kind of novel slurry filling material suitable for shield method |
| CN111574181A (en) * | 2020-06-05 | 2020-08-25 | 中国地质科学院矿产综合利用研究所 | Acidic water glass grouting material and preparation method thereof |
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Legal Events
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080917 |