CN1475633A - Land making method using water way,harbour district dredge soil - Google Patents
Land making method using water way,harbour district dredge soil Download PDFInfo
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- CN1475633A CN1475633A CNA021288089A CN02128808A CN1475633A CN 1475633 A CN1475633 A CN 1475633A CN A021288089 A CNA021288089 A CN A021288089A CN 02128808 A CN02128808 A CN 02128808A CN 1475633 A CN1475633 A CN 1475633A
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- coagulant
- dredging
- mud
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- epeirogenetic
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Abstract
A technology for building artificial land includes pumping the sludge generated by dredging the navigation channel or harbour in mixing pool, adding coagulant, stirring, pumping in deposition pool, depositing, removing water layer, and naturally drying the earth layer for 2-3 years.
Description
Technical field:
The present invention relates to a kind of epeirogenetic method.Particularly a kind of navigation channel, basin of utilizing dredged the epeirogenetic method that native coagulating sedimentation is reinforced.
Background technology:
Utilize at present the epeirogenetic method of navigation channel, basin dredging soil, adopt the method for natural subsidence more, need the 8-9 year, could form ultra-soft foundation.It is the dredging soil natural sedimentation after extracting with navigation channel or basin.Because the dredging penus in basin or navigation channel is in (0-3) class soil, through stirring and after hydraulic reclamation transported, the particle diameter of mud particles was between (0.003-0.070) mm, these mud particles are suspended in to form in the water with cotton-shaped or alveolate texture dredges native mud.To dredge native mud with cutter suction dredger by tubing pump and deliver in the hydraulic reclamation ground, carry out natural sedimentation.In precipitation process, in hydraulic reclamation ground, on the superficial layer of contact with air, mud particles dries out comparatively fast, cured layer can occur.Because the particle diameter of the mud particles that cured layer is following is little, easily forms hydration shell.The formation of hydration shell has stoped the discharge of lower floor's pore water, causes the speed of natural sediment very slow.Therefore, the 8-9 that adopts natural subsidence to need generally need could form land through the sedimentation time of 8-10, and this land belongs to ultra-soft foundation, if this ultra-soft foundation is used for architectural engineering, then needs further processing.Processing method to ultra-soft foundation normally adopts the method for sanding well and piling prepressing to carry out the stabilization by drainage of soil at present.
In order to accelerate the stabilization by drainage of ultra-soft foundation, invented the method for plastic draining board vacuum preloading the seventies, compare with original piling prepressing method, saved a large amount of preloading material and transport power.But there is following defective in this method in practice;
1, owing to be subjected to the restriction of vacuum, improve the bearing capacity of ground if desired, must be aided with the piling prepressing method, assist precompressed with the preloading material.
2, when ground sank significantly, must cushioning a large amount of backfills as a supplement.
3, for guaranteeing the necessary bearing capacity of mechanical movement, sometimes also need set up the bed course that the chaste tree fragrant plant adds mountain skin soil.
Summary of the invention:
The present invention aims to provide a kind of epeirogenetic method of utilizing the coagulating sedimentation reinforcing of navigation channel, basin dredging soil, the stability that it can accelerate to dredge the precipitation reinforcing speed of soil and improve the soil body.
The present invention will dredge native mud to pass through the tubing pump extracting in mixing pit, after in the mud of dredging soil, adding coagulant, stir, enter sedimentation basin, through the precipitation of short time, form the clear water layer and the compression layer of mud-water separation, constantly the clear water in the clear water layer is discharged, compression layer in the sedimentation basin can form engineering soil through natural drying 2-3.
Dredging native mud also can be with in the natural sedimentation process, the navigation channel that denseness is bigger, and basin mud adds the laggard capable agitation and dilution of entry and forms.
The adding method of coagulant can also be coagulant to be joined extracting with constant displacement pump dredge in the pipeline of native mud, injects mixing pit along with dredging native mud, and mixes with the native mud of dredging.
Coagulant can adopt inorganic coagulant or organic coagulant, or mixes the mixing coagulant that forms with organic coagulant by inorganic coagulant; Inorganic coagulant such as bodied ferric sulfate, poly-ferric chloride etc., organic coagulant such as polypropylene acid amides etc.
When using inorganic coagulant, inorganic coagulant is (1-10) % with the weight ratio of the native mud dry ground of dredging; When using organic coagulant, organic coagulant is 0.5 ‰-1% with the weight ratio of the native mud dry ground of dredging.
The weight ratio of inorganic coagulant and organic coagulant is (2000-10) in the mixing coagulant: 1; Use when mixing coagulant, mixing coagulant is (0.1-10) % with the weight ratio of dredging native mud dry ground.
Coagulant can utilize the extracting kinetic energy of the native mud of dredging to carry out mix and blend with the mixed method of the native mud of dredging, makes it to mix.Also can in sedimentation basin, stir with screw canoe or portable agitator, make it to mix.
Because the mud particles in the native mud of dredging is tiny, is subjected to the attraction of its surface field, hydrone is attracted to the surface of mud particles, forms in conjunction with water layer.This is in conjunction with in the water layer, near the mud particles surface for by force in conjunction with water layer, be called fixed bed; Away from the mud particles surface be weak in conjunction with water layer, be called diffusion layer.The negative electrical charge on fixed bed and diffusion layer and mud particles surface consists of electric double layer, and has current potential, and the height of this current potential determines to finish the thickness of Heshui layer, and directly affects the sinking speed of the native mud of dredging in conjunction with the thickness of water layer.
The present invention adopts coagulant is added the method that the coagulating sedimentation of the native mud of dredging is reinforced, and is the active group that utilizes coagulant and reduces current potential in conjunction with water layer, destroys in conjunction with water layer, makes the mud particles of suspension assemble to sink, and condenses; And, also can make the mud particles of suspension that the absorption bridging takes place, make mud particles become big, flocculate.In cohesion and flocculation process, when the density of mud particles during greater than the density of water, under action of gravitation, the mud particles sinking.The sinking of mud particles makes mud-water separation, obvious water and soil separating interface occurs, forms clear water layer and compression layer.The mud particles of compression layer is subjected to the action of gravity on upper strata, and along with the growth of time, pore water and gas are constantly discharged.When surface and contact with air, because capillarity, pore water can be overflowed quickly, and the compression layer volume then constantly diminishes, and density increases, and reaches the purpose of consolidated compacting.
The present invention has not only accelerated to dredge the mud particles sinking speed of native mud, and the 8-10 that needs from natural subsidence drops to 2-3, and the mud particles after the sedimentation is big, and soil stabilization can directly use as engineering soil.
Specific implementation method:
For will be through natural sedimentation time more than 5 years, area be (80 * 20) m
2, handling the degree of depth is (1.8-2.2) m, the unit weight scope is at (1.3-1.5) kg/m
3Dredging make the land with local methods, adopt method of the present invention, implementation process is as follows:
1, build mixing pit, specification is (20 * 20) m; The sedimentation basin specification is (50 * 20) m;
2, the formation of dredging native mud; This is added water through natural sedimentation time at the dredging soil more than 5 years mix stirring, make it become the unit weight scope at (1.10-1.25) kg/m
3(0.003-0.005) dredging of mm soil mud.
3, by tubing pump, with the pipeline of Φ 700mm, 1.8km blows apart from dredging native mud extracting in mixing pit; Bodied ferric sulfate and polymerization propionamide are made into the mixing coagulant according to the ratio of weight ratio 9%; To mix coagulant with constant displacement pump and add in the mixing pit, making the coagulant and the weight ratio of the native mud dry ground of dredging is 8%.Utilize the extracting kinetic energy of the native mud of dredging can make coagulant and dredge mixing of native mud, or stir with screw canoe or portable agitator, make it to mix.
4, the dredging that will mix with coagulant soil mud injects sedimentation basin, condenses in sedimentation basin and flocculates.After a few hours, the water and soil separating interface promptly appears.
5, the water of separating out after precipitation in the sedimentation basin is discharged.The mud particles of compression layer is gradually intensive in sedimentation basin, when the water and soil interface constantly descends, can again continue to inject the native mud of dredging in sedimentation basin, mixes precipitation.Repeated multiple times increases the mud particles of compression layer, and improve at the water and soil interface.
6, through 6 months precipitation, liquidity index reached I
L=0.59.
7, through 18 months natural drying after date, the unit weight of compression layer reached 1.8kg/m again
3The injection radix reaches N=20, and liquidity index reaches I
L≤ 0, reach the standard of engineering soil.
Claims (9)
1, a kind of navigation channel, basin of utilizing dredged the epeirogenetic method that native coagulating sedimentation is reinforced, it is characterized in that the native mud of dredging is passed through the tubing pump extracting in mixing pit, in the mud of dredging soil, behind the adding coagulant, stir, inject sedimentation basin, through the precipitation of short time, form the clear water layer and the compression layer of mud-water separation, constantly the clear water in the clear water layer is discharged, compression layer in the sedimentation basin can form engineering soil through natural drying 2-3.
2, epeirogenetic method according to claim 1 is characterized in that dredging native mud with in the natural sedimentation process, the navigation channel that denseness is bigger, and basin mud adds the laggard capable agitation and dilution of entry and forms.
3, epeirogenetic method according to claim 1, the adding method that it is characterized in that coagulant are coagulant to be joined with extracting with constant displacement pump dredge in the pipeline of native mud, inject mixing pit along with dredging native mud, and mix with the native mud of dredging.
4, epeirogenetic method according to claim 1 is characterized in that coagulant can adopt inorganic coagulant such as bodied ferric sulfate, poly-ferric chloride etc.; The weight ratio that inorganic coagulant adds the native mud dry ground of dredging is (1-10) %.
5, epeirogenetic method according to claim 1 is characterized in that coagulant can adopt organic coagulant, as polypropylene acid amides etc.; The weight ratio that organic coagulant adds the native mud dry ground of dredging is 0.5 ‰-1%.
6, epeirogenetic method according to claim 1, it is characterized in that coagulant can adopt by inorganic coagulant mixes the mixing coagulant of forming with organic coagulant; The mixed weight ratio of inorganic coagulant and organic coagulant is (2000-10) in the mixing coagulant: 1; The weight ratio of mixing the native mud dry ground of coagulant adding dredging is (0.1-10) %.
7, epeirogenetic method according to claim 1 is characterized in that coagulant and the mixed method of the native mud of dredging are to utilize the extracting kinetic energy of the native mud of dredging to carry out mix and blend.
8, epeirogenetic method according to claim 1 is characterized in that the coagulant and the mixed method of the native mud of dredging are to stir with the screw canoe in sedimentation basin.
9, epeirogenetic method according to claim 1 is characterized in that the coagulant and the mixed method of the native mud of dredging are to stir with portable agitator in sedimentation basin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021288089A CN1475633A (en) | 2002-08-14 | 2002-08-14 | Land making method using water way,harbour district dredge soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021288089A CN1475633A (en) | 2002-08-14 | 2002-08-14 | Land making method using water way,harbour district dredge soil |
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| Publication Number | Publication Date |
|---|---|
| CN1475633A true CN1475633A (en) | 2004-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA021288089A Pending CN1475633A (en) | 2002-08-14 | 2002-08-14 | Land making method using water way,harbour district dredge soil |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100341796C (en) * | 2004-05-26 | 2007-10-10 | 中国环境科学研究院 | Bottom silt storage-yard residual-water treatment method and system for environmental protection dredging |
| CN102718300A (en) * | 2012-07-11 | 2012-10-10 | 中交天津港航勘察设计研究院有限公司 | Method and device for environment-friendly dredging remained water metering coagulation treatment |
| CN104674785A (en) * | 2015-01-05 | 2015-06-03 | 王军 | Method for treating dredger fill foundation through flocculation combined with vacuum preloading |
| CN104963315A (en) * | 2015-05-19 | 2015-10-07 | 温州大学 | Combined treatment method for reclaiming land from sea |
| CN104961316A (en) * | 2015-05-19 | 2015-10-07 | 温州大学 | Self-weight slurry water reducing treatment method |
| CN110835915A (en) * | 2019-11-26 | 2020-02-25 | 中国十七冶集团有限公司 | Construction method for backfilling frame foundation by adopting slurry separation |
-
2002
- 2002-08-14 CN CNA021288089A patent/CN1475633A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100341796C (en) * | 2004-05-26 | 2007-10-10 | 中国环境科学研究院 | Bottom silt storage-yard residual-water treatment method and system for environmental protection dredging |
| CN102718300A (en) * | 2012-07-11 | 2012-10-10 | 中交天津港航勘察设计研究院有限公司 | Method and device for environment-friendly dredging remained water metering coagulation treatment |
| CN104674785A (en) * | 2015-01-05 | 2015-06-03 | 王军 | Method for treating dredger fill foundation through flocculation combined with vacuum preloading |
| CN104963315A (en) * | 2015-05-19 | 2015-10-07 | 温州大学 | Combined treatment method for reclaiming land from sea |
| CN104961316A (en) * | 2015-05-19 | 2015-10-07 | 温州大学 | Self-weight slurry water reducing treatment method |
| CN104963315B (en) * | 2015-05-19 | 2017-07-14 | 温州大学 | Reclaim fields from the sea combination treatment method |
| CN104961316B (en) * | 2015-05-19 | 2018-06-12 | 温州大学 | A kind of dead-weight mud diminishing processing method |
| CN110835915A (en) * | 2019-11-26 | 2020-02-25 | 中国十七冶集团有限公司 | Construction method for backfilling frame foundation by adopting slurry separation |
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