CN106978795A - A kind of Novel geogrid and its application for the old and new's dyke joint portion - Google Patents
A kind of Novel geogrid and its application for the old and new's dyke joint portion Download PDFInfo
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- CN106978795A CN106978795A CN201710250320.6A CN201710250320A CN106978795A CN 106978795 A CN106978795 A CN 106978795A CN 201710250320 A CN201710250320 A CN 201710250320A CN 106978795 A CN106978795 A CN 106978795A
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- gsz
- dyke
- old
- new
- solution
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/16—Sealings or joints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/14—Soil-conditioning materials or soil-stabilising materials containing organic compounds only
-
- 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
- E02D3/005—Soil-conditioning by mixing with fibrous materials, filaments, open mesh or the like
-
- 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
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2103/00—Civil engineering use
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0006—Plastics
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0045—Composites
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0084—Geogrids
Abstract
The present invention provides a kind of Novel geogrid for the old and new's dyke joint portion, including surface is provided with the GSZ of some liquid overflow holes, and by liquid injection pipe to irrigating the microorganism glued layer that microorganism mixed solution is formed inside GSZ.The present invention also provides a kind of ruggedized construction of the old and new's dyke joint portion.The invention provides it is a kind of it is internal can fluid injection Novel geogrid, with reference to GSZ and microbial mineralization principle, punish because the old and new's dyke combine it is improper caused by differential settlement, sliding, seepage flow, piping the problems such as.It is more closely knit that microorganism mixed bacteria liquid can be such that the Novel geogrid is combined with the old and new's dyke, effectively fill because injection GSZ is to the gap caused by old dyke, strengthen the effect of the resistance differential settlement of GSZ, while the glued layer of microbial mineralization generation can also play a part of antiseepage；The use of the binder materials such as cement is that replaced, CO is reduced2Discharge capacity, it is to avoid the aggravation of greenhouse effects.
Description
Technical field
The invention belongs to dyke enlarging reinforcing engineering field, specifically, it is related to a kind of for the old and new's dyke joint portion
Novel geogrid.
Background technology
The continuous improvement required with flood control is, it is necessary to carry out heightening and thickening to dyke building, and heightening of embankment protection trains thick engineering
The punishment that middle the old and new's dyke is combined is improper, tends to occur the diseases such as differential settlement, sliding, seepage flow, piping, directly results in
The flood control capacity of dyke declines, therefore, and the combination punishment of the old and new's dyke is particularly important.
The experience that the old and new's dyke joint portion refers to roadbed extension project mostly, such as domatic progress in old dyke are administered at present
Step excavation, GSZ is added while having in the old and new's dyke junction, and this method can effectively prevent the old and new's dyke
Relative settlement, but the extension project of roadbed is mostly below the level of ground water, and dyke is a kind of special dash building
Thing is, it is necessary to which flood is limited in flood passage road, it is necessary to prevent the disasters such as seepage flow, and the requirement for expanding engineering to dyke is stricter, newly
The compaction rate that old dyke is combined is very crucial, be particularly due to by GSZ pour into old dyke caused by gap fill up not
When being easy to cause the disasters such as seepage flow, therefore there is certain defect and deficiency in the simple experience for applying mechanically roadbed extension project.
The content of the invention
It is an object of the invention to provide a kind of Novel geogrid for the old and new's dyke joint portion.
Add it is a further object of the present invention to provide a kind of the old and new's dyke joint portion constructed using the Novel geogrid
Fixing structure.
In order to realize the object of the invention, a kind of Novel geogrid for the old and new's dyke joint portion of the invention, including
Surface is provided with the GSZ of some liquid overflow holes, and by liquid injection pipe to perfusion microorganism mixed solution institute inside GSZ
The microorganism glued layer of formation.
A diameter of 2-3cm of the GSZ, wall thickness is 5-10mm, and the aperture of the liquid overflow hole is 1-2cm, pitch of holes
For 7-10cm.
The GSZ of the present invention is to be added by polypropylene or high density polyethylene (HDPE) or high-strength polyester fibers through thermoplastic and pore-forming
A kind of two-way grille of 3 D stereo of work.The grid tensile strength is high, and stretching force is small, and anti-tear force intensity is big, in length and breadth by force
Spend difference small, ultraviolet-resistant aging, wear-resistant, corrosion-resistant, light weight are strong with soil or rubble interlocking power.
The microorganism glued layer includes soil particle and microorganism mixed solution, and the microorganism mixed solution includes bacterium solution
And nutrient solution.Wherein, the bacterium solution is Pasteur's gemma sarcine bacterium solution.The nutrient solution is by urea and solubility calcium salting liquid
Composition.
Preferably, bacterial concentration is 108-109cells/L.Nutrient solution is by volume ratio 1:1 urea and CaCl2Solution group
Into mixed solution, the two concentration is identical, is 1-1.5mol/L.
The present invention also provides the Novel geogrid and extends the application in reinforcing in dyke.It is by the GSZ
On the horizontal plane for being laid in the old and new's dyke junction, and one end of the GSZ is stretched into old dyke levee body, and to geotechnique
Bacterium solution and nutrient solution are injected in grid, every square metre of grid injection bacterium solution 10-30L and nutrient solution 10-30L, is noted several times every time
Enter.It is preferred that it is 20L that every square metre of grid, which injects bacterium solution and nutrient solution, every time.
The present invention also provides a kind of the old and new's dyke joint portion ruggedized construction, is included in the domatic upper excavation platform of old dyke backwater
Rank, consistent with the every one-level step level height new dyke earth material structure filled and lays on every one-level step horizontal plane
The Novel geogrid, wherein, one end of the GSZ is stretched into old dyke levee body.
When constructing at the scene, specific work process can be carried out as follows：
1st, smooth location, and reconnoitre scene, according to in-situ data and heightening and thickening size determine GSZ usage amount and
The depth of the old dyke of injection.
2nd, step excavation, and construction working well is set, arrangement rig is mechanical, and the machinery can be by the old dike of GSZ injection
It is anti-, and the soil got out is transported out.
3rd, GSZ is laid by design, fills new dyke earth material, layered rolling is to designing compactness.
4th, prepare and inject bacterium solution and nutrient solution into GSZ respectively, every time every square metre of grid injection bacterium solution and battalion
Nutrient solution is 20L, is injected several times, every time injection interval 30min or so.
5th, after fluid injection is finished, site clearing, backfilling working well.
The present invention use a kind of new GSZ, the grid be a kind of high intensity, corrosion-resistant, skin-friction coefficient compared with
Big direction earthwork grille, it can be by least one liquid injection pipe to liquid is irrigated inside it, and there is liquid overflow hole on surface, can be uniform
Liquid is overflowed to soil body surface on ground.This new GSZ, and the old dyke of injection are laid in the old and new's dyke faying face
Certain depth, by this new GSZ, is injected separately into microbial inoculum and nutrient solution, is evenly distributed in liquid
The soil body surface contacted with GSZ.
Microorganism of the present invention is that Pasteur's gemma sarcine (is purchased from China General Microbiological culture presevation management
Center, numbering 1.3687), culture medium is Yeast extract 20g/L, NH4Cl 10g/L, MnSO410mg/L, NiCl6
24mg/L, pH to 7.5-8.5 is adjusted with NaOH.Nutrient solution is CaCl2Solution and urea liquid, thalline are produced in metabolic processes
Raw a large amount of urases, the urase can hydrolyze urea and produce CO3 2-Ion；Due to the special construction of the bacteria cell wall, bacterium surface
Negatively charged, bacterial cell is adsorbed onto soil body particle surface, when containing finite concentration calcium ion in hole environment, calcium ion meeting
Adsorbed by cell, so that using cell as nucleus, the nuclei of crystallization of calcium carbonate crystal, calcium carbonate crystal crystallization can be generated around bacterium
Core is with colloidality secretion one layer of closely knit glued layer of formation of bacterium and its generation, and intensity is up to 20MPa or so, while this glue
The osmotic coefficient ratio for tying layer is relatively low, lower than the infiltration coefficient of the conventional soil body 3~4 times, can play good anti-seepage effect.Reaction
Equation is as follows：
Cell+ soil particles → Cell- soil particles
Cell- soil particles+Ca2+→ Cell- soil particles-Ca2+
Cell- soil particles-Ca2++CO3 2-→ Cell- soil particles-CaCO3
It is former with reference to GSZ and microbial mineralization the invention provides a kind of Novel geogrid of internal energy fluid injection
Reason, punish because the old and new's dyke combine it is improper caused by uniform settlement, sliding, seepage flow, piping the problems such as.Microorganism mixed bacteria liquid can
GSZ is combined with the old dike of new dike it is closely knit, effectively fill because injection GSZ give old dyke caused by gap, enhancing
The effect of the resistance differential settlement of GSZ, while the glued layer of microbial mineralization generation can also play the work of antiseepage
With；The use of the binder materials such as cement is that replaced, CO is reduced2Discharge capacity, it is to avoid the aggravation of greenhouse effects.
Microbial mineralization is a kind of phenomenon of generally existing in nature, some of soil body microorganism can also utilize from
The metabolic activity generation multi mineral crystallization of body.Because calcium carbonate is to be distributed a kind of most wide carbonate in nature, and
Property is relatively stable, with stronger intensity and durability.Meanwhile, the microorganism fungus kind selected by the present invention is carried from soil
Harmless, the non-pathogenic bacteria taken, it is relatively safer；In addition, using intrinsic bacterium in situ, being increased by the method for Culture in situ
Grow, make the need for the speed of microbial reaction reaches engineering.
The old and new's dyke faying face is under the collective effect of GSZ and microbial inoculum, and GSZ mainly undertakes decrease
The generation of the old and new's dyke relative settlement, the glued layer that microorganism mixed bacteria liquid is produced can prevent faying face from occurring Seepage problems,
It can also fill simultaneously because of the gap that the old dyke of GSZ injection is produced, can make that GSZ combined with the soil body is closer.
The present invention has advantages below：
(1) the invention provides a kind of GSZ for being capable of slip casting, it is not required on GSZ in colligation Grouting Pipe,
Constructing operation is easy.
(2) by injecting mixed bacteria liquid, react and produce closely knit glued layer, can fill because extending through old dyke
The internal and gap that produces, and GSZ can be made to be engaged closely with the old dike of new dike.
(3) contrast injection concrete etc. binder materials or chemical high polymer etc., it is to avoid it is to surrounding soil and vegetation
Corrode, while CO can also be reduced2Discharge capacity, reduces the aggravation of greenhouse effects, ecological, environmental protective.
(4) glued layer that mixed bacteria liquid is produced, can strengthen the effect of the resistance differential settlement of GSZ, moreover it is possible to
Enough play a part of antiseepage.
(5) the old and new's dyke is carried out after reinforcement using the Novel geogrid, the safety coefficient of dyke can be increased, entered
And dyke section can be reduced, Economization on land.
Brief description of the drawings
Fig. 1 is the top view of GSZ in the embodiment of the present invention 1.
Fig. 2 is the cross-sectional view of the old and new's dyke joint portion ruggedized construction in the embodiment of the present invention 2.
In figure, 1- GSZs, 2- liquid overflow holes, 3- liquid injection pipes, the old dykes of 4-, 5- Novel geogrids and microorganism are cementing
Layer, the new dyke earth material structures of 6- (heightening and thickening part), 7- grounds (levee body), 8- water levels.
Embodiment
Following examples are used to illustrate the present invention, but are not limited to the scope of the present invention.Unless otherwise specified, embodiment
In the conventional meanses that are well known to those skilled in the art of used technological means, raw materials used is commercial goods.
In the description of the invention, unless otherwise indicated, the orientation or state relation of the instruction such as term " on ", " under " are only
For the ease of the description present invention and simplified description, rather than indicate or imply that the device or element of meaning must be with specific sides
Position, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
A kind of Novel geogrid for the old and new's dyke joint portion of embodiment 1
As depicted in figs. 1 and 2, a kind of Novel geogrid for the old and new's dyke joint portion that the present embodiment is provided, bag
The GSZ 1 that surface is provided with some liquid overflow holes 3 is included, and is mixed by liquid injection pipe 3 to perfusion microorganism inside GSZ
The microorganism glued layer that solution is formed.
The GSZ be by polypropylene or high density polyethylene (HDPE) or high-strength polyester fibers through thermoplastic and into hole machined and
Into a kind of 3 D stereo two-way grille.The grid tensile strength is high, and stretching force is small, and anti-tear force intensity is big, in length and breadth intensity difference
Different small, ultraviolet-resistant aging, wear-resistant, corrosion-resistant, light weight are strong with soil or rubble interlocking power.It can by a liquid injection pipe to
Its internal perfusion liquid, there is liquid overflow hole on surface, equably liquid can overflow to soil body surface.The diameter of the GSZ
For 3cm, wall thickness is 10mm, and the aperture of the liquid overflow hole is 2cm, and pitch of holes is 10cm.
The microorganism glued layer includes soil particle and microorganism mixed solution, and the microorganism mixed solution includes bacterium solution
And nutrient solution.Wherein, the bacterium solution is Pasteur's gemma sarcine bacterium solution, and bacterial concentration is 5 × 108cells/L.The nutrition
Liquid is by volume ratio 1:1 urea and CaCl2The mixed solution of solution composition, the two concentration is 1mol/L.
A kind of the old and new's dyke joint portion ruggedized construction of embodiment 2
The old and new's dyke joint portion ruggedized construction (Fig. 2) that the present embodiment is provided, is included in the domatic upper excavation of the old backwater of dyke 4
Step, the new dyke earth material structure 6 filled consistent with every one-level step level height and on every one-level step horizontal plane upper berth
If embodiment 1 GSZ, wherein, one end of the GSZ is stretched into old dyke levee body.
When constructing at the scene, specific work process is as follows：
1st, smooth location, and reconnoitre scene, according to in-situ data and heightening and thickening size determine GSZ usage amount and
The depth of the old dyke of injection.
2nd, step excavation, and construction working well is set, arrangement rig is mechanical, and the machinery can be by the old dike of GSZ injection
It is anti-, and the soil got out is transported out.
3rd, GSZ is laid by design, fills new dyke earth material, layered rolling is to designing compactness.
4th, prepare and inject bacterium solution and nutrient solution into GSZ respectively, every time every square metre of grid injection bacterium solution and battalion
Nutrient solution is 20L, point 5 injections, every time injection interval 30min or so.
5th, after fluid injection is finished, site clearing, backfilling working well.
The invention provides a kind of GSZ for being capable of fluid injection, the old and new's dyke junction is routed to, and stretch into old dyke；
By injecting mixed bacteria liquid to GSZ, react and produce closely knit glued layer, can fill because extending through in old dyke
Portion and the gap produced, and GSZ can be made to be engaged with the old dike of new dike closely, enhancing GSZ resistance is uneven heavy
The effect of drop, additionally it is possible to play a part of antiseepage.The present invention is without, in colligation Grouting Pipe, constructing operation is simple on GSZ
Just, the binder materials such as contrast injection cement or chemical high polymer etc., ecological, environmental protective, energy-saving and emission-reduction.
Although above the present invention is described in detail with a general description of the specific embodiments,
On the basis of the present invention, it can be modified or improved, this will be apparent to those skilled in the art.Cause
This, these modifications or improvements, belong to the scope of protection of present invention without departing from theon the basis of the spirit of the present invention.
Claims (10)
1. a kind of Novel geogrid for the old and new's dyke joint portion, it is characterised in that be provided with some liquid overflow holes including surface
GSZ, it is and cementing to the microorganism that perfusion microorganism mixed solution is formed inside GSZ by liquid injection pipe
Layer.
2. GSZ according to claim 1, it is characterised in that a diameter of 2-3cm of the GSZ, wall thickness is
5-10mm, the aperture of the liquid overflow hole is 1-2cm, and pitch of holes is 7-10cm.
3. GSZ according to claim 1, it is characterised in that the GSZ is gathered by polypropylene or high density
A kind of two-way grille for 3 D stereo that ethene or high-strength polyester fibers are processed through thermoplastic and pore-forming.
4. the GSZ according to claim any one of 1-3, it is characterised in that the microorganism glued layer includes soil
Grain and microorganism mixed solution, the microorganism mixed solution include bacterium solution and nutrient solution.
5. GSZ according to claim 4, it is characterised in that the bacterium solution is Pasteur's gemma sarcine bacterium solution；
The concentration of the bacterium solution is 108-109cells/L。
6. GSZ according to claim 4, it is characterised in that the nutrient solution is by urea and solubility calcium salting liquid
Composition.
7. GSZ according to claim 6, it is characterised in that the nutrient solution is by volume ratio 1:1 urea and
CaCl2The mixed solution of solution composition, the two concentration is identical, is 1-1.5mol/L.
8. any one of the claim 1-7 GSZs extend the application in reinforcing in dyke.
9. application according to claim 8, it is characterised in that the GSZ is laid in the old and new's dyke junction
On horizontal plane, and one end of the GSZ is stretched into old dyke levee body, and injection bacterium solution and nutrient solution into GSZ,
Every square metre of grid injection bacterium solution 10-30L and nutrient solution 10-30L, injects several times every time；It is preferred that each every square metre of grid
It is 20L to inject bacterium solution and nutrient solution.
10. a kind of the old and new's dyke joint portion ruggedized construction, it is characterised in that be included in the domatic upper step excavation of old dyke backwater,
Consistent with every one-level step level height new dyke earth material structure filled and the power laid on every one-level step horizontal plane
Profit requires the Novel geogrid described in any one of 1-7, wherein, one end of the GSZ is stretched into old dyke levee body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710250320.6A CN106978795A (en) | 2017-04-17 | 2017-04-17 | A kind of Novel geogrid and its application for the old and new's dyke joint portion |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710250320.6A CN106978795A (en) | 2017-04-17 | 2017-04-17 | A kind of Novel geogrid and its application for the old and new's dyke joint portion |
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| Publication Number | Publication Date |
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| CN106978795A true CN106978795A (en) | 2017-07-25 |
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| CN201710250320.6A Pending CN106978795A (en) | 2017-04-17 | 2017-04-17 | A kind of Novel geogrid and its application for the old and new's dyke joint portion |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108060666A (en) * | 2017-11-20 | 2018-05-22 | 河海大学 | One kind is for the cured separation storage sprinkling system of microorganism and its application method |
| CN108532392A (en) * | 2018-04-26 | 2018-09-14 | 福州大学 | A kind of hollow TGXG and the united grouting method of microbial technique |
| CN109763504A (en) * | 2019-03-19 | 2019-05-17 | 长沙矿山研究院有限责任公司 | A kind of slope ecological is reinforced and greening method |
| CN113089584A (en) * | 2021-03-18 | 2021-07-09 | 中国水利水电第九工程局有限公司 | Construction method of soil dam heightening anti-seepage PVC geomembrane |
| CN114345927A (en) * | 2022-01-14 | 2022-04-15 | 江苏省环境工程技术有限公司 | Pollution site risk control barrier material and application thereof |
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| CN204875409U (en) * | 2015-07-05 | 2015-12-16 | 商丘工学院 | Joint geogrid reinforced structure of powder fine sand road bed microorganism grout |
| CN106047366A (en) * | 2016-06-20 | 2016-10-26 | 方祥位 | Method for improving microorganism solidified coral sand by use of polypropylene fibers |
| CN106223348A (en) * | 2016-07-18 | 2016-12-14 | 河海大学 | A kind of microorganism GSZ associating reinforcement method |
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| WO2004097104A2 (en) * | 2003-05-01 | 2004-11-11 | Indian Jute Industries Research Association | A rot resistant durable natural fibre and/or geo-textiles |
| CN102966072A (en) * | 2012-11-14 | 2013-03-13 | 河海大学 | Construction method for treating widened and heightened engineering joint surfaces of dikes on soft clay foundation |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108060666A (en) * | 2017-11-20 | 2018-05-22 | 河海大学 | One kind is for the cured separation storage sprinkling system of microorganism and its application method |
| CN108532392A (en) * | 2018-04-26 | 2018-09-14 | 福州大学 | A kind of hollow TGXG and the united grouting method of microbial technique |
| CN109763504A (en) * | 2019-03-19 | 2019-05-17 | 长沙矿山研究院有限责任公司 | A kind of slope ecological is reinforced and greening method |
| CN113089584A (en) * | 2021-03-18 | 2021-07-09 | 中国水利水电第九工程局有限公司 | Construction method of soil dam heightening anti-seepage PVC geomembrane |
| CN114345927A (en) * | 2022-01-14 | 2022-04-15 | 江苏省环境工程技术有限公司 | Pollution site risk control barrier material and application thereof |
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