CN104412751A - Improvement method for viscous seashore saline soil of saline-alkali wasteland - Google Patents
Improvement method for viscous seashore saline soil of saline-alkali wasteland Download PDFInfo
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- CN104412751A CN104412751A CN201310374652.7A CN201310374652A CN104412751A CN 104412751 A CN104412751 A CN 104412751A CN 201310374652 A CN201310374652 A CN 201310374652A CN 104412751 A CN104412751 A CN 104412751A
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Abstract
The invention provides an improvement method for viscous seashore saline soil of saline-alkali wasteland. A technological method adopted by the invention comprises the following steps of: measuring and placing samples, performing earthwork excavating and filling including replacing, filling, excavating and transporting saline-alkali soil, smoothing site, clearing and transporting the saline-alkali soil to the designed and specified depth, wherein the depth is within a designed requirement error range. According to the improvement method disclosed by the invention, the conventional PVC (polyvinyl chloride) blind tube and a UPVC (rigid polyvinyl chloride) double-thread leakage tube are replaced by the gravel blind ditches which form a dewatering and salt-eliminating system. The dewatering and salt-eliminating system is used for achieving the functions of dewatering in rainy season and eliminating salts in dry seasons by virtue of a series of measures by punching and filling sands, increasing soil organic substances, and the like for the soil surface.
Description
Technical field
The present invention relates to technical field of land improvement, be specifically related to a kind of salt-alkali shoaly land clayey coastal saline soil improvement method.
Background technology
At present, the area in saline land is constantly in expansion, and comprise arable land, forest land etc., saline land area is close to 1,000,000,000 hectares in the world, and the saline land area of China is 100,000,000 hectares, occupies 1/10th of world's share; The universities and colleges of lot of domestic and foreign, the governing problem in reply saline land is being studied always by scientific research institutions, the river construction method that great majority adopt, biological harnessing method, chemical-agent technique and Chinese scholar are permitted, and will is female also proposes the desalinization of soil by flooding or leaching method etc. of flush discharge order by " light after first heavy; namely first to wash heavy saline, then wash light saline land and behind first upstream downstream within the scope of sublateral canal " at the beginning of the eighties in last century.
But, these methods are on certain basis, also certain effect is achieved, but numerous technical scheme of showing and construction technology more delayed, to China, urgently land resources leaved for development is relatively slower, and cost is higher, salt discharge DeGrain, especially, in drainage salt system, traditional PVC blind pipe and the two screw thread of UPVC ooze pipe, the shortcoming and defect such as catchment area is little, draining is obstructed, resistance to compression explosion; Simultaneously can't block salinity in saline-alkali soil to rise along capillary, not remarkable etc. every salt effect.
Therefore, the present invention develops on the basis mainly solving more than currently available technology existence deficiency.
Summary of the invention
Technical problem solved by the invention is to provide one french drain process at any time drainage salt system problem, and construction is simple, and cost of investment is little, every the salt-alkali shoaly land clayey coastal saline soil improvement method of salt successful.
Based on above-mentioned purpose, technical problem solved by the invention realizes by the following technical solutions:
A kind of salt-alkali shoaly land clayey coastal saline soil improvement method, the process step adopted is as follows:
1) surveying and locating, earthwork excavation and filling: replacing, landfill, dig fortune saline-alkali soil, smooth location, clear the depth requirements of saline-alkali soil to design code, the degree of depth reaches designing requirement error band;
2) laying of salt discharge ditch:, the french drain of dark 15 centimetre wide 30 centimetres along interval, gradient direction 5-7.5m P mining, french drain keeps 0.2% gradient, and from eminence is dug, ditch wants straight, and bottom of trench is smooth; Vertical french drain direction, excavates wide 30 centimetres, dark 20 centimetres drain ditch below gradient, and lower than subterranean water level 15cm at the bottom of drain ditch, drain ditch keeps the gradient of 0.5%;
3) permeable non-woven fabrics is laid in french drain: the metalling that upper berth is 20 centimetres, ballast grain sizes 2 centimetres to 3 centimetres, then repaves the coarse sand of 10 cm thicks, also paves with rubble or stone, and keep corresponding gradient in drain ditch.
4) drain ditch connects french drain: drain ditch is connected with french drain that is peripheral or that more deeply intersect vertically, keeps clear, forms the drainage network system be interconnected;
5) gravel backfill: french drain and drain ditch surrounding rubble are filled out lid, and its thickness should be not less than 15cm.
6) saline and alkaline separation layer is laid: on the peak level of underground, the following laying depth of layer of planting be rubble or the stone of 20-30cm, and its upper berth water penetration geotextiles, is formed every pouring layer.
7) build sump, cover composite plant soil: sump should along direction, drain ditch, and interval 50-100m is arranged; Back cut diameter 60-80cm, go to the bottom diameter 120cm, and bottom should maintain an equal level with subterranean water level, covers composite plant soil, complete salt discharge work.
Further, described composite plant soil, according to the deal ratio that salt alkali content difference adopts is:
During salt content 0.3-0.6, every square metre needs cow dung or farmyard manure 0.1m
3, vinasse 4Kg;
During salt content 0.6-1.0, every square metre needs cow dung or farmyard manure 0.15m
3, vinasse 6Kg;
During salt content 1.0-1.5, every square metre needs cow dung or farmyard manure 0.25m
3, vinasse 9Kg.
The invention has the beneficial effects as follows, this method rubble french drain replaces traditional PVC blind pipe and the two screw thread of UPVC to ooze pipe, form drainage salt system by rubble french drain, fill with husky by soil surface punching, increase the function that the series of measures such as the soil organic matter play draining in rainy season, salt discharge in dry season; This process has the advantages such as catchment area is large, draining is unobstructed, resistance to compression does not burst; Also there is salinity in blocking-up saline-alkali soil rise along capillary simultaneously, every salt Be very effective, make the water being positioned at more than french drain, salinity is discharged smoothly by rubble french drain, and being in the water of below french drain, salinity is subject to macroporous obstruct between rubble in french drain, is difficult to rise again.With comprising the fertilizers (formula) such as vinasse, cow dung, distillers' grains, rice chaff, siliceous fertilizer, ardealite or a small amount of superphosphate, as modifying agent, increase kind and the quantity of microorganism in fertilizer; The soil organic matter and granular structure can be increased like this, reduce soil salt content and regulate P in soil H value, to improve soil aeration water permeable ability, improving the water of soil, gas, hot situation, alleviate the saline and alkaline injury effect to plant, within shortening the salt discharge cycle to half a year; After application technique, every square metre of engineering cost saves about 30%, and this engineering construction is simple, it is little to invest, and is applicable to the improvement of salt-alkali shoaly land clayey marine solonchak, effectively saved freshwater resources, be beneficial to large scale application.
Embodiment
For feature of the present invention, technological means and the specific purposes reached, function can be understood further, below in conjunction with embodiment, the present invention is described in further detail.
A kind of salt-alkali shoaly land clayey coastal saline soil improvement method, the process step adopted is as follows:
1) surveying and locating, earthwork excavation and filling: replacing, landfill, dig fortune saline-alkali soil, smooth location, clear the depth requirements of saline-alkali soil to design code, the degree of depth reaches designing requirement error band; Saline-alkali soil is cleared must to the end, to limit, put in place, and bottom face requires that flatness reaches design error scope; Alkaline earth in-situ balancing or alkaline earth shaping reach designing requirement; Fill with husky in soil surface punching, pore size control is within the scope of 0.003mm-0.03mm;
2) laying of salt discharge ditch:, the french drain of dark 15 centimetre wide 30 centimetres along interval, gradient direction 5-7.5m P mining, french drain keeps 0.2% gradient, and from eminence is dug, ditch wants straight, and bottom of trench is smooth; Vertical french drain direction, excavates wide 30 centimetres, dark 20 centimetres drain ditch below gradient, and lower than subterranean water level 15cm at the bottom of drain ditch, drain ditch keeps the gradient of 0.5%;
3) lay permeable non-woven fabrics in french drain: the metalling that upper berth is 20 centimetres, ballast grain sizes 2 centimetres to 3 centimetres, then repaves the coarse sand of 10 cm thicks, also paves with rubble or stone, and keep corresponding gradient in drain ditch;
4) drain ditch connects french drain: drain ditch is connected with french drain that is peripheral or that more deeply intersect vertically, and keep clear, form the drainage network system be interconnected, the horizontal ditch intersected vertically, specification is equal to parallel ditch, imports sump or municipal drainage well;
5) gravel backfill: french drain and drain ditch surrounding rubble are filled out lid, and its thickness should be not less than 15cm, the backfill degree of depth is change, note during backfill the soil moved in improve the original of both sides not being mixed in stone, otherwise its effect can be affected, stone is filled to separation layer top, after backfill acceptance(check), slightly tamp;
6) saline and alkaline separation layer is laid: on the peak level of underground, the following laying depth of layer of planting be rubble or the stone of 20-30cm, and its upper berth water penetration geotextiles, is formed every pouring layer, answer even uniform, must not be interrupted every pouring layer; Object is by laying separation layer, prevents the original salinity bottom greenery patches from rising.Material bulk, graininess stone that separation layer is used, stone diameter 1-3cm; Separation layer laying depth is 20cm, and thickness error scope is generally ± 1cm; During construction, machinery, vehicle directly can not enter the greening place of laying interlayer, avoid separation layer together with the alkaline earth spreading of bottom, lose or weaken buffer action; Separation layer lays non-woven fabrics, and joint will be carried out in non-woven fabrics junction, to ensure salt discharge alkali effect;
7) build sump, cover composite plant soil: sump should along direction, drain ditch, and interval 50-100m is arranged; Back cut diameter 60-80cm, go to the bottom diameter 120cm, and bottom should maintain an equal level with subterranean water level, and cover composite plant soil, when the planting soil formula adopted is salt content 0.3-0.6, every square metre needs cow dung or farmyard manure 0.1m
3, vinasse 4Kg;
During salt content 0.6-1.0, every square metre needs cow dung or farmyard manure 0.15m
3, vinasse 6Kg; During salt content 1.0-1.5, every square metre needs cow dung or farmyard manure 0.25m
3, vinasse 9Kg, like this with comprising the fertilizers (formula) such as vinasse, cow dung, distillers' grains, rice chaff, siliceous fertilizer, ardealite or a small amount of superphosphate, as modifying agent, increase kind and the quantity of microorganism in fertilizer; The soil organic matter and granular structure can be increased like this, reduce soil salt content and regulate P in soil H value, to improve soil aeration water permeable ability, improving the water of soil, gas, hot situation, alleviate the saline and alkaline injury effect to plant, then complete salt discharge work.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. a salt-alkali shoaly land clayey coastal saline soil improvement method, is characterized in that, the process step adopted is as follows:
1) surveying and locating, earthwork excavation and filling: replacing, landfill, dig fortune saline-alkali soil, smooth location, clear the depth requirements of saline-alkali soil to design code, the degree of depth reaches designing requirement error band;
2) laying of salt discharge ditch:, the french drain of dark 15 centimetre wide 30 centimetres along interval, gradient direction 5-7.5m P mining, french drain keeps 0.2% gradient, and from eminence is dug, ditch wants straight, and bottom of trench is smooth; Vertical french drain direction, excavates wide 30 centimetres, dark 20 centimetres drain ditch below gradient, and lower than subterranean water level 15cm at the bottom of drain ditch, drain ditch keeps the gradient of 0.5%;
3) permeable non-woven fabrics is laid in french drain: the metalling that upper berth is 20 centimetres, ballast grain sizes 2 centimetres to 3 centimetres, then repaves the coarse sand of 10 cm thicks, also paves with rubble or stone, and keep corresponding gradient in drain ditch.
4) drain ditch connects french drain: drain ditch is connected with french drain that is peripheral or that more deeply intersect vertically, keeps clear, forms the drainage network system be interconnected;
5) gravel backfill: french drain and drain ditch surrounding rubble are filled out lid, and its thickness should be not less than 15cm.
6) saline and alkaline separation layer is laid: on the peak level of underground, the following laying depth of layer of planting be rubble or the stone of 20-30cm, and its upper berth water penetration geotextiles, is formed every pouring layer.
7) build sump, cover composite plant soil: sump should along direction, drain ditch, and interval 50-100m is arranged; Back cut diameter 60-80cm, go to the bottom diameter 120cm, and bottom should maintain an equal level with subterranean water level, covers composite plant soil, complete salt discharge work.
2. salt-alkali shoaly land clayey coastal saline soil improvement method according to claim 1, is characterized in that, described composite plant soil, according to the deal ratio that salt alkali content difference adopts is:
During salt content 0.3-0.6, every square metre needs cow dung or farmyard manure 0.1m
3, vinasse 4Kg;
During salt content 0.6-1.0, every square metre needs cow dung or farmyard manure 0.15m
3, vinasse 6Kg;
During salt content 1.0-1.5, every square metre needs cow dung or farmyard manure 0.25m
3, vinasse 9Kg.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104904469A (en) * | 2015-05-29 | 2015-09-16 | 山东龙泽生态环境开发有限公司 | Greening method for controlling salt elimination area by area in coastal saline area |
| CN105347933A (en) * | 2015-11-18 | 2016-02-24 | 天津港海湾园林绿化有限公司 | Spray seeding matrix and method for saline land greening by adopting the spray seeding matrix |
| CN106817942A (en) * | 2017-01-19 | 2017-06-13 | 赵常然 | By alkaline land improving into spongy soil method |
| CN108012609A (en) * | 2017-10-25 | 2018-05-11 | 山东胜景旅游发展有限公司 | A kind of salt-soda soil covers greening method |
| CN108076715A (en) * | 2017-11-22 | 2018-05-29 | 鞍钢集团矿业有限公司 | A kind of modification method of powder loamy texture saline-alkali soil |
| CN109757144A (en) * | 2018-05-28 | 2019-05-17 | 光大环境修复(江苏)有限公司 | A kind of modification method of beach saline land |
| CN109892057A (en) * | 2017-12-11 | 2019-06-18 | 京蓝北方园林（天津）有限公司 | A kind of method of discarded salt pond soil soil improvement |
| CN110679226A (en) * | 2019-10-23 | 2020-01-14 | 上海园林绿化建设有限公司 | Construction method combining dredger fill improvement and planting hole improvement |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104904469A (en) * | 2015-05-29 | 2015-09-16 | 山东龙泽生态环境开发有限公司 | Greening method for controlling salt elimination area by area in coastal saline area |
| CN105347933A (en) * | 2015-11-18 | 2016-02-24 | 天津港海湾园林绿化有限公司 | Spray seeding matrix and method for saline land greening by adopting the spray seeding matrix |
| CN105347933B (en) * | 2015-11-18 | 2018-07-31 | 天津港海湾园林绿化有限公司 | A method of matrix of sowing grass seeds by duster and using this sow grass seeds by duster matrix carry out saline land greening |
| CN106817942A (en) * | 2017-01-19 | 2017-06-13 | 赵常然 | By alkaline land improving into spongy soil method |
| CN108012609A (en) * | 2017-10-25 | 2018-05-11 | 山东胜景旅游发展有限公司 | A kind of salt-soda soil covers greening method |
| CN108076715A (en) * | 2017-11-22 | 2018-05-29 | 鞍钢集团矿业有限公司 | A kind of modification method of powder loamy texture saline-alkali soil |
| CN109892057A (en) * | 2017-12-11 | 2019-06-18 | 京蓝北方园林（天津）有限公司 | A kind of method of discarded salt pond soil soil improvement |
| CN109757144A (en) * | 2018-05-28 | 2019-05-17 | 光大环境修复(江苏)有限公司 | A kind of modification method of beach saline land |
| CN110679226A (en) * | 2019-10-23 | 2020-01-14 | 上海园林绿化建设有限公司 | Construction method combining dredger fill improvement and planting hole improvement |
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Application publication date: 20150318 |