CN100542987C - Loosening sand stabilized coagulant - Google Patents
Loosening sand stabilized coagulant Download PDFInfo
- Publication number
- CN100542987C CN100542987C CNB2005100188276A CN200510018827A CN100542987C CN 100542987 C CN100542987 C CN 100542987C CN B2005100188276 A CNB2005100188276 A CN B2005100188276A CN 200510018827 A CN200510018827 A CN 200510018827A CN 100542987 C CN100542987 C CN 100542987C
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- coagulant
- loosening sand
- stabilized
- loosening
- sand
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Abstract
Loosening sand stabilized coagulant is fully stirred by coagulating agent+water+quickened lime to be formed.Its component is the percentage meter by weight: the shared ratio of coagulating agent is 10%-20%, and the shared ratio of water is 70%-80%, and the shared ratio of quickened lime is 5%-10%.Adopt loosening sand stabilized coagulant to solidify loosening sand doubly than uncured raising unconfined compression strength 50-60.The soil body after the curing has the function of ecosystem revivification.
Description
Technical field
The present invention relates to the geotechnical engineering field, is a kind of novel material that solidifies loosening sand
Background technology
Loosening sand (fine silt, silty soil etc.) has that structure is disperseed, plasticity is low, inviscid, void ratio greatly, characteristic such as easily saturated, shearing resistance, ultimate compression strength be low, under the loading action that repeats or happen suddenly, its super hole setting-out can continue or rise suddenly, under the not smooth situation of soil layer drainage condition, just may cause grogs to be in suspension, at this moment the slip resistance of the soil body completely loses, and demonstrates to be close to liquid characteristic, is called as " liquefaction " of soil.This phenomenon takes place, the sedimentation that the top structures are produced, and then tilt, so that the destruction of collapsing fully.This class foundation soil is " liquefaction " possibility maximum when meeting earthquake, Japanese Nigata earthquake in 1964 and China's Tangshan earthquake in 1976 all proved the ground loosening sand potential this liquefaction danger.
Conventional process loosening sand ground based method is a lot, sums up and to get up can be divided into chemical treatment, physical treatment and chemistry, the physics method that combines.The physical treatment method has: heavy-tamping method, vibroflotation method etc., these methods can change the loosening sand degree of compactness to a certain extent, but can not fundamentally change characteristic.Adopting solidify material that loosening sand is cured processing is a kind of chemical treatment method, is used for changing the composition and the soil body engineering properties of loosening sand, thereby reaches the raising soil strength, improves the purpose of the compactibility of the soil body.Usually the solidify material that adopts in engineering has: inorganic binders such as lime, cement.The solidify material that these are traditional and the soil body fully stir according to a certain ratio, carry out compound effects by hydration reaction and soil particle, can play pectisation preferably.But it does not have perviousness, diffustivity, handles being easier to implement for the ground of shallow-layer, and deep foundation base can only adopt mixing pile, and the form of rotary churning pile is finished.Can not the following soil body in bulk treatment basis.
Usually adopt rigid protections such as concrete blocks, mortar flag stone for the loosening sand Slope Treatment, also have the grid of employing, the concrete method of sprinkling to come stable side slope, these methods can be controlled the erosion damage of the soil body effectively.From the angle of economy and ecosystem revivification, the slip-stick artist is mostly to be to improve the engineering properties of loosening sand in research, thereby reaches stable side slope, the purpose of ecosystem revivification.
Summary of the invention
One, the preparation of loosening sand stabilized coagulant
Loosening sand stabilized coagulant is fully stirred by efficient composite coagulant+water+quickened lime to be formed.Wherein the shared ratio of efficient composite coagulant is 10%-20%, and the shared ratio of water is 70%-80%, and the shared ratio of quickened lime is 5%-10% (weight ratio).Efficient composite coagulant belongs to series product, has inorganic, organic and inorganic and the configuration of organic phase bonded, specifically decides on the situation of the soil body.This product is produced by wealth Science and Technology Ltd. in the Wuhan, and market is on sale.
Two, the loosening sand stabilized coagulant principle of solidification
Loosening sand stabilized coagulant is fully stirred by efficient composite coagulant+water+quickened lime to be formed.Wherein efficient composite coagulant have stronger perviousness, diffustivity, can be water-soluble, huge linear molecule is arranged.Each molecule is made up of many chain links, and the chain internode is with covalent bonds.Each chain link is a monomer, and chain number is the polymerization degree.Its polymerization degree n can reach 90,000.Corresponding molecular weight can be up to 2,500 ten thousand, and its molecule is a monomer molecule amount sum.Molecular structure is:
General formula is:
After the polymer substance of coagulating agent is water-soluble, form superpolymer, all have linear structure through hydrolysis and polycondensation.The fine silt particulate has the strong adsorption effect to this family macromolecule material, also has Van der Waals force, intermolecular hydrogen bond or other physics, chemisorption.Because polymer substance is easily by fine silt particulate institute strong adsorption, line style length is bigger, thus it can be between two particulates adsorption bridging.Promptly after its end adsorbed a certain particulate, the other end stretched into and adsorbs another particulate in the water again, and particulate is by the polymer adsorption bridging, and particle becomes greatly gradually, thereby forms thick flocs unit.Quickened lime for chemical reaction provides alkaline environment, produces calcareous crystallization gummous substance as coagulant aids simultaneously, loosening sand is changed become that particle is big, toughness, the hard-packed soil body.Fundamentally improve the loosening sand engineering properties, improve soil body shearing resistance, ultimate compression strength.
Embodiment
1, ground is handled
Loosening sand stabilized coagulant has stronger perviousness, diffustivity.Utilize tradition " seepin grouting method " static pressure in the loosening sand deep foundation base to inject loosening sand stabilized coagulant, can prevent the generation of " liquefaction " phenomenon, strengthen the intensity of the soil body.Loosening sand stabilized coagulant also can be used as the blended materials that shallow-layer loosening sand ground consolidation is handled.
2, Slope Treatment
Loosening sand stabilized coagulant divided be sprayed at uniformly on the surface of loosening sand slope soil for 2 to 3 times, infiltrate the soil body, can make loosening sand form hard-packed plate, strengthen shearing resistance, ultimate compression strength and the erosion resistibility of the soil body by the method for infiltration.Stability of slope after the processing has the function of soil conservation, ecosystem revivification.
3, solidity test
Test adopts correlated method to carry out, and respectively to carrying out spray test with a kind of loosening sand, the sprinkling amount is as the criterion with saturated, does not trickle and is advisable with the loosening sand stabilized coagulant aqueous solution and water.In 7cm * 7cm * 7cm die trial is packed in sampling into respectively, be placed on shaking table vibration one minute, wipe off on the surface then, and test block is moved to the curing room maintenance, and the demoulding two days later continues maintenance to specific time, detects unconfined compression strength.The result is: spray water unconfined compression strength in the 7 day length of time is 12kPa, spraying loosening sand stabilized coagulant unconfined compression strength in the 7 day length of time is 563kPa, be 687kPa the 28 day length of time, and the loosening sand unconfined compression strength after solidifying has improved 50-60 doubly than uncured.
Claims (3)
1, a kind of loosening sand stabilized coagulant, it is characterized in that: fully stir by efficient composite coagulant+water+quickened lime and form, wherein the shared ratio of efficient composite coagulant is 10%-20%, and the shared ratio of water is 70%-80%, and the shared ratio of quickened lime is 5%-10% (weight ratio).
2, as loosening sand stabilized coagulant as described in the right 1, it is characterized in that: loosening sand stabilized coagulant has stronger perviousness, diffustivity, utilize tradition " seepin grouting method " static pressure in the loosening sand deep foundation base to inject loosening sand stabilized coagulant, can prevent the generation of " liquefaction " phenomenon, strengthen the intensity of the soil body, loosening sand stabilized coagulant also can be used as the blended materials that shallow-layer loosening sand ground consolidation is handled.
3, as loosening sand stabilized coagulant as described in the right 1, it is characterized in that: loosening sand stabilized coagulant is divided be sprayed at uniformly on the surface of loosening sand slope soil for 2 to 3 times, method by infiltration is infiltrated the soil body, can make loosening sand form hard-packed plate, strengthen shearing resistance, ultimate compression strength and the erosion resistibility of the soil body, stability of slope after the processing has the function of soil conservation, ecosystem revivification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100188276A CN100542987C (en) | 2005-06-01 | 2005-06-01 | Loosening sand stabilized coagulant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100188276A CN100542987C (en) | 2005-06-01 | 2005-06-01 | Loosening sand stabilized coagulant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1693262A CN1693262A (en) | 2005-11-09 |
| CN100542987C true CN100542987C (en) | 2009-09-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100188276A Expired - Fee Related CN100542987C (en) | 2005-06-01 | 2005-06-01 | Loosening sand stabilized coagulant |
Country Status (1)
| Country | Link |
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| CN (1) | CN100542987C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103485328B (en) * | 2013-09-23 | 2015-04-08 | 河海大学 | Method for performing ecological reinforcement on soil slope surface by utilizing composite curing agent |
| CN105951709B (en) * | 2016-06-07 | 2018-04-13 | 重庆科技学院 | The method for curing sand is denatured using salt solubility temperature |
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2005
- 2005-06-01 CN CNB2005100188276A patent/CN100542987C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1693262A (en) | 2005-11-09 |
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Granted publication date: 20090923 Termination date: 20120601 |