CN102498772A - Method for in-situ improvement of dredger fill into soil for planting - Google Patents
Method for in-situ improvement of dredger fill into soil for planting Download PDFInfo
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- CN102498772A CN102498772A CN2011103477536A CN201110347753A CN102498772A CN 102498772 A CN102498772 A CN 102498772A CN 2011103477536 A CN2011103477536 A CN 2011103477536A CN 201110347753 A CN201110347753 A CN 201110347753A CN 102498772 A CN102498772 A CN 102498772A
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Abstract
The invention discloses a method for in-situ improvement of dredger fill into soil for planting, aiming at providing the method through which the investment in soil change is reduced and limited land resources are protected by utilizing the dredger fill which is used as a matrix after being subjected to fast desalinization and fertilizer application by directly utilizing a soil improving material without soil change. The method comprises the following steps of: laying stripe-like spraying layers in the dredger fill, wherein the laying thickness of the spraying layers is 20cm; digging a collecting gutter under each spraying layer, laying a blind pipe in each collecting gutter, winding polypropylene yarns outside each blind pipe, and performing desalinization through the spraying layers and the blind pipes; blending an improving material comprising organic matters and inorganic matters into the dredger fill, wherein the blending depth can ensure that the soil in root layers of plants is in contact with the improving material; and irrigating washing brine. According to the method disclosed by the invention, the soil change is avoided, the operation is simple, the improvement effect is good, and damages to the soil resources, engineering investment and construction procedure can be reduced. Furthermore, green coverage can be fast increased, and a living environment of residents can be improved so as to be conductive to construction of an eco-city.
Description
Technical field
The present invention relates to a kind of barged-in fill original position improvement and be the method for planting soil.
Background technology
Bay mud (sea silt soil) fixed drainage and the soil that forms is referred to as barged-in fill (dredger fill) on the engineering of bay after hydraulic reclamation epeirogenetic belongs to the hemipelagic sediment of upper river water and soil loss.Do not pass through soil-forming process such as physical weathering, chemical weathering and biological weathering as yet.Barged-in fill physical behavior extreme difference, hard when doing, muddy when wet, ventilation infiltration ability extreme difference, solvable salt content is high, is generally 1.5%～2.5%, and sodium, chlorion account for the absolute predominance of total ion concentration.
The barged-in fill of indication of the present invention is the barged-in fill of coastal region hydraulic reclamation epeirogenetic, and quality is sticking heavy, and salt content is high, and generally more than 1.0%, physicochemical character is very poor.Because its sticking heavy quality, too high salt grades, and has brought very big difficulty to greening, and is therefore higher to the specification requirement of greening.These barged-in fills become the coastal region greening and build a big obstacle of development.
Because the barged-in fill proterties is more inferior than marine solonchak, can not directly plant ornamental plant.Therefore, the afforestation construction mostly adopts the method for " soil moved in to improve the original " to carry out, and large-area soil removal and replacement is huge to the destruction of surrounding enviroment; There is serious negative effect; And the integrated cost of building exploitation is increased, and the fast development that greening is built also make the soil resource growing tension.Therefore, the improvement of barged-in fill original position utilizes significant.
Summary of the invention
The present invention is in order to overcome weak point of the prior art; Provide a kind of without soil removal and replacement; Directly utilize soil improvement material that the barged-in fill quick desalination is done to utilize after the matrix with fostering and apply fertilizer, reduce the investment of soil removal and replacement, protect the barged-in fill original position improvement of limited land resources to be the method for planting soil.
The present invention realizes through following technical proposals:
A kind of barged-in fill original position improvement is characterized in that for the method for planting soil, comprises the steps:
(1) degree of depth is that 1.0m-1.2m place laying ribbon drenches layer in barged-in fill, and drenching a layer laying depth is 20cm, digs collecting ditch under every pouring layer; Shop blind pipe in each collecting ditch; Every blind pipe outside is wound with the polypropylene fibre silk, and the end of blind pipe is communicated with sump, and sump is communicated with the municipal drainage system or is provided with carries drainage arrangement; The sump place is provided with inspection shaft, carries out salt discharge through drenching layer and blind pipe;
(2) in barged-in fill, mix the improvement material of being made up of organic materials and inorganic material, the incorporation of said improvement material is the 5-10% of barged-in fill volume; Wherein organic materials accounts for 50-70%; Inorganic material accounts for 30-50%; Mix the degree of depth and make the soil of plant root layer can both touch the improvement material, contain the desulfurated plaster of coal-burning power plant's gypsum method flue gas desulfurization generation of 85%-95%, superphosphate and the inorganic phosphor-contained fertilizer of 5%-15% in the said inorganic material; Said organic materials comprises weathered coal, the peat composed of rotten mosses, thick organic matter, and wherein, weathered coal accounts for 0%-15%, and the peat composed of rotten mosses accounts for 85%-100% after mixing with arbitrary proportion with thick organic matter.
(3) irrigate desalinization of soil by flooding or leaching water.
Said thick organic matter is become thoroughly decomposed completely at least a in thick fertilizer, stalk, the cow dung of direct fermentation.
The hydraulic reclamation time of said barged-in fill, the moisture content of barged-in fill was below 20% more than 2 years.
The spacing of adjacent blind pipe is 4m-8m.
Said pouring layer is a stone nitre.
Blind pipe has 0.3% gradient to sump.
The accessory substance that produces when used desulfurated plaster is coal-burning power plant's gypsum method flue gas desulfurization among the present invention is by the SO in the flue gas
2With desulfurizing agent CaCO
3Reacting generates through forced oxidation, and its main component is CaSO
42H
2O and CaSO
3Mixture, the character and the plaster of paris are similar, and contain the essential or useful mineral nutrition of plants such as abundant S, Ca, Si.Wherein the sulfate dihydrate calcium content is more than 90%, and calcium sulfite is about 5%, and all the other compositions such as S, Ca, Si equal size are about 5%, and particle diameter is 40um-60um, and free water content is 8%-15%.Particle is short cylinder, and fineness ratio is 1.5-2.5, and color is faint yellow.
The present invention has following technique effect:
1, not soil removal and replacement of method of the present invention; Directly utilize on-the-spot barged-in fill to add improvement materials such as desulfurated plaster, inorganic phosphor-contained material, thick organic matter and carry out soil melioration, below ground is laid and is drenched layer and salt discharge blind pipe, the green plants of can directly planting after the improvement; Simple to operate; Improved effect is good, can reduce the destruction of soil resource, reduces construction investment and operational procedure.Can increase green coverage fast, improve resident's living environment, promote local environmental quality, help Eco-city construction.
2, contain abundant desulfurated plaster in the improvement material, the calcium ion in the desulfurated plaster can improve the granular structure of soil, promotes the formation of soil aggregate, and the soil active porosity is increased, and then improves the infiltration speed of soil, accelerates salinity drip washing.And the adding of desulfurated plaster can also improve the water immersed bulk density of soil, and the barged-in fill bearing capacity is strengthened, and the chance water stability is good, and expansibility is little, can keep the soil excellent air permeability, so infiltration rate is fast, helps the rapid desalination of barged-in fill.
3, the organic materials in the improvement material mainly is for soil organic matter and humus to be provided; The peat composed of rotten mosses, thick fertilizer, cow dung etc. all contain abundant organic matter, and organic acid that organic matter decomposition produced and humus are except improving soil physical property; Regulate beyond the acid base equilibrium; Ion too much in the soil is also played cushioning effect, and the harm of too much ion pair plant generation of the initial stage of can reducing or remitting promotes the transformation of barged-in fill to the planting soil direction.
4, method of the present invention can be used to the desulfurizing byproduct-desulfurated plaster of coal-burning power plant, avoids it that environment is caused secondary pollution, really realizes refuse reclamation.
Embodiment
Barged-in fill original position improvement of the present invention comprises the steps: for the method for planting soil
(1) degree of depth is that ribbon pouring layer is laid at the 1.0m-1.2m place in barged-in fill, drenches layer and adopts stone nitre, and a pouring layer laying depth is 20cm.Every the pouring layer digs the collecting ditch that bottom width is 30cm down, shop blind pipe in each collecting ditch, and the blind pipe outside is wound with the polypropylene fibre silk, and the end of blind pipe is communicated with sump, and blind pipe has 0.3% gradient to sump.Sump is communicated with the municipal drainage system or is provided with carries drainage arrangement, and the sump place is provided with inspection shaft, carries out salt discharge through drenching layer and blind pipe.
The spacing that ribbon drenches layer is 4m-8m according to the length of barged-in fill hydraulic reclamation time and the height of salt content.The barged-in fill hydraulic reclamation time, spacing shorter, the high more pouring layer of salt content was more little.
(2) in barged-in fill, mix the improvement material of being made up of organic materials and inorganic material, wherein organic materials accounts for 50-70%, and inorganic material accounts for 30-50%, mixes the degree of depth and makes the soil of plant root layer can both touch the improvement material.The incorporation of improvement material is generally the 5-10% of barged-in fill volume.
Contain the desulfurated plaster of coal-burning power plant's gypsum method flue gas desulfurization generation of 85%-95%, superphosphate and the inorganic phosphor-contained fertilizer of 5%-15% in the said inorganic material.
Said organic materials comprises weathered coal, the peat composed of rotten mosses, thick organic matter, and wherein, weathered coal accounts for 0%-15%, and the peat composed of rotten mosses accounts for 85%-100% after mixing with arbitrary proportion with thick organic matter.Said thick organic matter is become thoroughly decomposed completely at least a in thick fertilizer, stalk, the cow dung of direct fermentation.
(3) irrigate desalinization of soil by flooding or leaching water: according to the salt content of barged-in fill, calculate the duty that the drip washing salinity needs, irrigate desalinization of soil by flooding or leaching water and meet the treegarden irrigation water supply standard according to conventional computing formula.
The barged-in fill that the present invention will improve requires the hydraulic reclamation time more than 2 years, and the moisture content of barged-in fill is below 20%.
Below to carry out with boundary port, Gangdong, Tianjin that barged-in fill improves on the spot be that embodiment is elaborated to the present invention.
Improvement plot 1200 square meters, wide 20m, long 60m, barged-in fill be the hydraulic reclamation two-and-a-half years, the moisture content 16% of barged-in fill, salt content is 1.6%, wherein the highest Na of content
+And Cl
-Be respectively 0.472% and 0.685%.
The salt discharge engineering is laid blind pipe, and blind pipe has 0.3% gradient to sump.Blind pipe spacing 4m, buried depth 1.2m, anti-channeling 60cm suitable for reading, end opening 30cm, high 30cm, pad rubble 15cm is filled out in the blind pipe bottom, lays blind pipe according to head fall, and misalignment of axe is not more than 20, and radius of turn is not less than 0.6m.The blind pipe outside is wound with the polypropylene fibre silk, and the end of blind pipe is communicated with the municipal drainage system with sump connected set well.The stone nitre that tiling 20cm is thick in the collecting ditch makes to drench layer.Drenching more than the layer is the former barged-in fill of 40cm thickness, and former barged-in fill top is the thick barged-in fill that mixes the improvement material of 60cm.Wherein, contain 40% inorganic material and 60% organic materials in the improvement material.Contain 92% desulfurated plaster in the inorganic material, 8% superphosphate, contain in the organic materials peat composed of rotten mosses and thick fertilizer each 50%.The incorporation of improvement material is 8% of a barged-in fill volume.
Dig the plant pit ornamental plants such as Chinese scholar tree, shrubby flase indigo and spindle tree of directly planting, arbor of planting and big shrub zone soil ball, irrigate desalinization of soil by flooding or leaching water: the salt content according to barged-in fill calculates the duty 1.1m that the drip washing salinity needs
3/ m
2, irrigate desalinization of soil by flooding or leaching water and meet the treegarden irrigation water supply standard.Survival rate is all more than 90%, and shoot growth is vigorous after 4 months, and the leaf look dark green, salt damage characteristics such as no branch distortion.Harmful ion Na in the soil
+And Cl
-Be reduced to 0.179% and 0.199% by initial 0.472% and 0.685% respectively, the reduction amplitude has reached 62% and 71% respectively, has practiced thrift a cubic metre of earth investment 20% simultaneously.
Claims (6)
1. a barged-in fill original position improvement is characterized in that for the method for planting soil, comprises the steps:
(1) degree of depth is that 1.0m-1.2m place laying ribbon drenches layer in barged-in fill, and drenching a layer laying depth is 20cm, digs collecting ditch under every pouring layer; Shop blind pipe in each collecting ditch; Every blind pipe outside is wound with the polypropylene fibre silk, and the end of blind pipe is communicated with sump, and sump is communicated with the municipal drainage system or is provided with carries drainage arrangement; The sump place is provided with inspection shaft, carries out salt discharge through drenching layer and blind pipe;
(2) in barged-in fill, mix the improvement material of being made up of organic materials and inorganic material, the incorporation of said improvement material is the 5-10% of hydraulic reclamation volume; Wherein organic materials accounts for 50-70%; Inorganic material accounts for 30-50%; Mix the degree of depth and make the soil of plant root layer can both touch the improvement material, contain the desulfurated plaster of coal-burning power plant's gypsum method flue gas desulfurization generation of 85%-95%, superphosphate and the inorganic phosphor-contained fertilizer of 5%-15% in the said inorganic material; Said organic materials comprises weathered coal, the peat composed of rotten mosses, thick organic matter, and wherein, weathered coal accounts for 0%-15%, and the peat composed of rotten mosses accounts for 85%-100% after mixing with arbitrary proportion with thick organic matter;
(3) irrigate desalinization of soil by flooding or leaching water.
2. barged-in fill original position according to claim 1 improvement is characterized in that for the method for planting soil, and said thick organic matter is become thoroughly decomposed completely at least a in slightly fertilizer, stalk, the cow dung of direct fermentation.
3. barged-in fill original position improvement according to claim 1 is characterized in that for the method for planting soil the hydraulic reclamation time of said barged-in fill, the moisture content of barged-in fill was below 20% more than 2 years.
4. barged-in fill original position improvement according to claim 1 is characterized in that for the method for planting soil the spacing of adjacent blind pipe is 4m-8m.
5. barged-in fill original position improvement according to claim 1 is characterized in that for the method for planting soil said pouring layer is a stone nitre.
6. barged-in fill original position improvement according to claim 1 is characterized in that for the method for planting soil blind pipe has 0.3% gradient to sump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103477536A CN102498772A (en) | 2011-11-07 | 2011-11-07 | Method for in-situ improvement of dredger fill into soil for planting |
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|---|---|---|---|
| CN2011103477536A CN102498772A (en) | 2011-11-07 | 2011-11-07 | Method for in-situ improvement of dredger fill into soil for planting |
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| CN102498772A true CN102498772A (en) | 2012-06-20 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102726141A (en) * | 2012-07-18 | 2012-10-17 | 张永康 | Saline-alkali soil improvement facility and method |
| CN103609386A (en) * | 2013-11-19 | 2014-03-05 | 天津泰达园林规划设计院有限公司 | Muddy coastal zone plant groove or plant hole afforestation method |
| CN103959953A (en) * | 2013-02-01 | 2014-08-06 | 上海市园林科学研究所 | Method for improving physical properties of urban soil |
| CN104652365A (en) * | 2013-11-20 | 2015-05-27 | 天津港海湾园林绿化有限公司 | Muddy tidal flats fast afforestation technology for land reclamation epeirogenic area |
| CN108643163A (en) * | 2018-06-06 | 2018-10-12 | 敦煌研究院 | A kind of salt damage prevention basis and earthen ruins reinforcement means |
| CN111374020A (en) * | 2020-04-09 | 2020-07-07 | 上海市园林科学规划研究院 | Dredger fill afforestation process method |
| CN111771670A (en) * | 2020-06-22 | 2020-10-16 | 天津泰达盐碱地绿化研究中心有限公司 | Method for improving river sediment into planting soil |
| CN113711724A (en) * | 2021-07-16 | 2021-11-30 | 中铁十六局集团置业投资有限公司 | Method for removing salt, controlling water and increasing fertilizer of saline-alkali soil in hydraulic filling area and application thereof |
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| CN101225654A (en) * | 2008-01-15 | 2008-07-23 | 同济大学 | Blow fill foundation treating method and gas injection draining method therefor |
| CN101683033A (en) * | 2009-08-27 | 2010-03-31 | 天津市北方园林生态科学技术研究所 | Method for quickly desalting dredgerfill by using desulfurization gypsum (DSG) |
| CN102021871A (en) * | 2009-09-15 | 2011-04-20 | 中国石油化工集团公司 | Foundation treatment method for temporary construction subgrade on dredge fill soft foundation site |
| CN102037806A (en) * | 2010-11-04 | 2011-05-04 | 天津市绿源环境景观工程有限公司 | Greening method for dredger fill |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101225654A (en) * | 2008-01-15 | 2008-07-23 | 同济大学 | Blow fill foundation treating method and gas injection draining method therefor |
| CN101683033A (en) * | 2009-08-27 | 2010-03-31 | 天津市北方园林生态科学技术研究所 | Method for quickly desalting dredgerfill by using desulfurization gypsum (DSG) |
| CN102021871A (en) * | 2009-09-15 | 2011-04-20 | 中国石油化工集团公司 | Foundation treatment method for temporary construction subgrade on dredge fill soft foundation site |
| CN102037806A (en) * | 2010-11-04 | 2011-05-04 | 天津市绿源环境景观工程有限公司 | Greening method for dredger fill |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102726141A (en) * | 2012-07-18 | 2012-10-17 | 张永康 | Saline-alkali soil improvement facility and method |
| CN103959953A (en) * | 2013-02-01 | 2014-08-06 | 上海市园林科学研究所 | Method for improving physical properties of urban soil |
| CN103959953B (en) * | 2013-02-01 | 2015-12-09 | 上海市园林科学研究所 | A kind of method improveing urban soil physical property |
| CN103609386A (en) * | 2013-11-19 | 2014-03-05 | 天津泰达园林规划设计院有限公司 | Muddy coastal zone plant groove or plant hole afforestation method |
| CN104652365A (en) * | 2013-11-20 | 2015-05-27 | 天津港海湾园林绿化有限公司 | Muddy tidal flats fast afforestation technology for land reclamation epeirogenic area |
| CN108643163A (en) * | 2018-06-06 | 2018-10-12 | 敦煌研究院 | A kind of salt damage prevention basis and earthen ruins reinforcement means |
| CN111374020A (en) * | 2020-04-09 | 2020-07-07 | 上海市园林科学规划研究院 | Dredger fill afforestation process method |
| CN111771670A (en) * | 2020-06-22 | 2020-10-16 | 天津泰达盐碱地绿化研究中心有限公司 | Method for improving river sediment into planting soil |
| CN111771670B (en) * | 2020-06-22 | 2022-05-13 | 天津泰达盐碱地绿化研究中心有限公司 | Method for improving river sediment into planting soil |
| CN113711724A (en) * | 2021-07-16 | 2021-11-30 | 中铁十六局集团置业投资有限公司 | Method for removing salt, controlling water and increasing fertilizer of saline-alkali soil in hydraulic filling area and application thereof |
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