CN108112294A - A kind of saline and alkali land improvement method - Google Patents
A kind of saline and alkali land improvement method Download PDFInfo
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- CN108112294A CN108112294A CN201711411868.0A CN201711411868A CN108112294A CN 108112294 A CN108112294 A CN 108112294A CN 201711411868 A CN201711411868 A CN 201711411868A CN 108112294 A CN108112294 A CN 108112294A
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B79/00—Methods for working soil
- A01B79/02—Methods for working soil combined with other agricultural processing, e.g. fertilising, planting
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B79/00—Methods for working soil
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/02—Extraction using liquids, e.g. washing, leaching, flotation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
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- Engineering & Computer Science (AREA)
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- Environmental Sciences (AREA)
- Environmental & Geological Engineering (AREA)
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Abstract
The invention discloses a kind of saline and alkali land improvement methods, quantities is larger when solving the construction of the prior art, it needs to excavate original soil layer when especially burying hidden pipe, so as to the problem of destroying original soil layer construction on a large scale, its key points of the technical solution are that：Original soil infiltrates；Separate pending unit；Flushing duct is excavated, the flushing duct includes the first flushing duct and the second flushing duct that are separately positioned on pending unit opposite sides, and the depth of first flushing duct is less than the depth of second flushing duct；Suction hose is vertically laid in second flushing duct；Irrigation liquid；Above-mentioned neutral water and excessive flushing liquor are collected in the second flushing duct, and passes through water pump and discharges in time；It improves and excavates soil due to needing embedded hidden pipe in the prior art, cause the problem of soil refilled is relatively soft, and soil aperture is increased, and water evaporation rate is accelerated, and soil water storage ability declines, and then causes the easy water shortage of plant, reduction growth result.
Description
Technical field
The present invention relates to technical field of soil remediation, more specifically, it relates to a kind of saline and alkali land improvement method.
Background technology
Salt-soda soil is a species of salt aggregation, refers to that the salinity contained by inside soil influences the normal life of crop
Long, the formation of China's alkaline earth and alkali-affected soil is most of related with the accumulation of Carbonates In Soil, thus basicity generally compared with
Height, serious salt affected soil regional plant can hardly survive.
Authorization Notice No. is the Chinese invention patent of CN103477745B, discloses a kind of saline-alkali soil treatment method, the party
Method includes the following steps：The underground structure hidden pipe desalting system of primary saline-alkali soil, the hidden pipe of the hidden pipe desalting system in strand
Height apart from ground is 1m~2m；It is the metalling of 15~35cm and zeolite rubble that overall thickness is laid in the top of the hidden pipe
Mixed layer, metalling and zeolite rubble mixed layer form double every in salt deposit, the zeolite rubble mixed layer, zeolite：The body of rubble
Product is than being 0.5~1:0.8~3, after the completion of laying, geotextiles are repaved on the surface layer of zeolite rubble mixed layer；By furfural dregs and original
Soil is according to volume ratio 0.5~2:10~20 after mixing, backfills and is compacted, and forms furfural dregs original soil improvement layer；Slow watering,
Until after the moisture in soil reaches saturation state, then flood pours, and the salt in soil is excluded by the hidden pipe desalting system
Point, until the average total salt quantity of soil in 1 meter is less than or equal to 0.5%.
Quantities is larger during the construction of the above-mentioned prior art, needs to dig original soil layer when especially burying hidden pipe
Pick, although improving alkaline land soil, the growth result of Planting Crops is unsatisfactory on it.
The content of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of saline and alkali land improvement method, have logical
Simple construction improvement salt-soda soil is crossed, and improves the effect of the crop growth state after improvement.
To achieve the above object, the present invention provides following technical solutions：
A kind of saline and alkali land improvement method, includes the following steps：
Original soil infiltrates：To the original soil sprinkling irrigation water of pending district, to soften alkaline land soil and lifting phreatic line；
Separate pending unit：Salt-soda soil is separated into multiple pending units by isolation band arranged in parallel, to
Independent process is carried out to each pending unit；
Excavate flushing duct：The flushing duct includes the first flushing duct for being separately positioned on pending unit opposite sides and the second punching
Ditch is washed, the depth of first flushing duct is less than the depth of second flushing duct；
Suction hose is vertically laid in second flushing duct：The lower nozzle of the suction hose is rinsed close to described second
The bottom of trench of ditch；
Irrigation liquid：The irrigation liquid in first flushing duct, after the flushing liquor completely infiltration, described first
Perfusion neutral water in flushing duct；
Above-mentioned neutral water and excessive flushing liquor are collected in the second flushing duct, and passes through water pump and discharges in time.
Using above-mentioned technical proposal, original soil infiltration enables alkaline land soil to soften, and convenient follow-up set completely cuts off band and open
Dig flushing duct, by lifting phreatic line, in irrigation liquid, reduce and oozed under flushing liquor, make more flushing liquors into
Enter to need the region rinsed, and it is reverse osmosis and enter the second flushing duct to be conducive to underground water, facilitates collection, passes through first irrigation
Then liquid is rinsed by neutral water to absorb the ion in salt-soda soil, above-mentioned neutrality is collected by the second flushing duct
Water and excessive flushing liquor；The technical program destroys original soil layer using the method improvement salt-soda soil of physics and chemical synthesis
Small, construction volume is small, improves and excavates soil due to needing embedded hidden pipe in the prior art, causes the soil refilled relatively soft,
Soil aperture is increased, and water evaporation rate is accelerated, and soil water storage ability declines, and then causes the easy water shortage of plant, reduces growth
The problem of effect.
Further, the isolation band is steel sheet pile, and the steel sheet pile vertically penetrates underground, the pending unit
It is enclosed and set by several steel sheet piles.
Using above-mentioned technical proposal, mutually oozed with the water between preventing adjacent isolation band by the isolation that steel sheet pile forms
Thoroughly, guarantee is provided for the controllability of flushing dose and time in subsequent rinsing step, i.e. washing time and flushing dose is conveniently pressed
It is calculated according to setting value.
Further, the horizontal distance between the first flushing duct and the second flushing duct of the pending unit is L, and L is used
The following formula determines：
L=T×u
u=k×l
Wherein, T is the design treatment cycle, and u is the seepage velocity in the salt-soda soil；K is infiltration coefficient, and l is hydraulic gradient.
Using above-mentioned technical proposal, the first of pending unit is drawn by the product in seepage velocity and design treatment cycle
Horizontal distance between flushing duct and the second flushing duct；Thus facilitate and control flushing fluid be perfused, make flushing be perfused
Liquid substantially can be by alkaline land improving to desired pH value, and will not cause flushing liquor that improvement is excessively caused excessively to make soil in acid
Property.
Further, the original soil infiltration includes：
It is the sprinkling irrigation of 30 days to carry out the cycle, and every sprinkling irrigation in 5 days once, continuous pouring 4 times allows the moisture of soil absorption abundance；Most
Stop within 10 days pouring afterwards, make the moisture natural diffuseness in soil uniform to reach water content in soil.
Using above-mentioned technical proposal, by the way that every sprinkling irrigation in 5 days, once, continuous pouring 4 times allowed the water of soil absorption abundance
Point, stop within last 10 days pouring, make the moisture natural diffuseness in soil uniform to reach water content in soil, so make subsequently to walk
Diffusion velocity is more uniform in the soil for flushing liquor in rapid, prevents since initial moisture content unevenness causes flushing liquor to exist in soil
Speed is unstable when being spread in soil, the phenomenon that causing improvement excessively or improve deficiency.
Further, the original soil infiltration further includes, by the way of rain making or by the way of manually spraying.
Using above-mentioned technical proposal, original soil is infiltrated by way of rain making and manually spraying, is relatively dropped naturally
Rain saves the time, and controllability is stronger.
Further, described be vertically laid in suction hose step in second flushing duct further includes,
Stalk is filled in second flushing duct, and the stalk wraps up the suction hose.
Using above-mentioned technical proposal, stalk has preferable water imbibition, and stalk can support suction hose, make suction hose more
Add stabilization.
Further, described be vertically laid in suction hose step in second flushing duct further includes,
In the lower nozzle of suction hose, filter element is set, the filter element includes,
First filter chamber is encircled by outer filter body, the first filter chamber of several connections and the external world are set on the outer filter body
First filter hole, the bore of first filter hole are gradually reduced along the direction in export-oriented first filter chamber；
Middle level filtering body in the first filter chamber, the middle level filtering body set to be enclosed by filter screen, the middle level filtering body
It is alternately arranged by the filter screen of at least two different pore sizes along the thickness direction of filter screen；
And be attached at middle level and filter in vivo geotextiles, the nozzle of suction hose is stretched into the space that geotextiles are surrounded.
Using above-mentioned technical proposal, outer filter body can filter bulky grain soil, and little particle soil can enter the first filtering
Intracavitary reduces clogging, and little particle soil and water are separated by middle level filtering body, final mistake is carried out by geotextiles
Filter reduces silt and enters the damage that water pump causes water pump.
Further, the stalk is the one or more in soybean stalk, rice straw or maize straw.
Using above-mentioned technical proposal, soybean stalk, rice straw or maize straw are respectively provided with preferable water absorbing properties.
Further, following steps are added between original soil infiltration and the pending unit step of separation, infiltrated
Turf is laid on original soil afterwards.
Using above-mentioned technical proposal, both can salt accumulation in soil be reduced with chesson, and herbage withers after rotting to decompose, production
Raw organic acid and carbon dioxide, which can neutralize, changes alkali；Since herbage has preferable coverage, make the moisture evaporation of soil surface
It reduces, to reduce the moisture evaporation in original soil immersion step；In addition, the root system of herbage can reinforce soil, reduce due to earth's surface
Washing away for water and carry more soil into the first flushing duct and the second flushing duct.
In conclusion the invention has the advantages that：
1st, original soil infiltration enables alkaline land soil to soften, and convenient follow-up set completely cuts off band and excavate flushing duct, by lifting
Lower water level line in irrigation liquid, is reduced and oozed under flushing liquor, and more flushing liquors is made to enter the region that needs rinse, and
It is reverse osmosis and enter the second flushing duct to be conducive to underground water, facilitates collection, by first irrigation liquid absorbing in salt-soda soil
Ion, be then rinsed by neutral water, pass through the second flushing duct and collect above-mentioned neutral water and excessive flushing liquor；This
For technical solution using the method improvement salt-soda soil of physics and chemical synthesis, construction volume is small, and small to the destruction of original soil layer, improves
Soil is excavated due to needing embedded hidden pipe in the prior art, causes that the soil refilled is relatively soft, and soil aperture is increased, moisture steams
It sends out speed to accelerate, soil water storage ability declines, and then causes the easy water shortage of plant, reduces growth result；
2nd, by being laid with turf, both can salt accumulation in soil be reduced with chesson, and herbage withers after rotting to decompose, generation has
Machine acid and carbon dioxide can neutralize and change alkali；Since herbage has preferable coverage, reduce the moisture evaporation of soil surface, with
Reduce the moisture evaporation in original soil immersion step；In addition, the root system of herbage can reinforce soil, washing away due to surface water is reduced
And more soil is carried into the first flushing duct and the second flushing duct.
Description of the drawings
It in order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description briefly to introduce, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with
Structure according to these attached drawings obtains other attached drawings.
Fig. 1 is a kind of schematic flow chart of saline and alkali land improvement method in the embodiment of the present invention；
Fig. 2 is for completing a kind of structure diagram of saline and alkali land improvement method in the embodiment of the present invention；
Fig. 3 is the structure diagram of the filter element in Fig. 2；
Fig. 4 is the top view in salt-soda soil in the embodiment of the present invention.
Reference numeral：100th, saturation soil layer；110th, the first flushing duct；111st, the second flushing duct；112nd, suction hose；113rd, water
Pump；120th, band is completely cut off；130th, inclined surface；140th, filter element；150th, outer filter body；160th, the first filter chamber；170th, first
Filter hole；180th, middle level filtering body；190th, geotextiles；200th, turf；201st, lattice door；202nd, water filling port；203rd, water injection pipe.
Specific embodiment
It elaborates below in conjunction with the accompanying drawings to technical scheme.
A kind of saline and alkali land improvement method is provided in the present embodiment, the salt content in soil to be made to be reduced to setting mark
Standard so as to improve the soil property in salt-soda soil, can be applied to beach primary salinization of land, can be used for due to being excessively used
Crops salt-soda soil caused by learning fertilizer.
Referring to Fig. 1 and Fig. 2（Arrow direction represents water penetration direction in Fig. 2）, specifically include the following steps：
S101, infiltrate to soften alkaline land soil by original soil；
S102, pending unit is separated：Salt-soda soil is separated into multiple pending lists by isolation band 120 arranged in parallel
Member, to carry out independent process to each pending unit（Fig. 4 is the top view in the salt-soda soil, shows that isolation band 120 is set
Position relationship in the salt-soda soil）；
S103, flushing duct is excavated：The flushing duct includes being separately positioned on what every group of pending unit was set close to isolation band 120
First flushing duct 110（Referring to Fig. 4）With the second flushing duct 111（Referring to Fig. 4）, the depth of first flushing duct 110 is less than institute
State the depth of the second flushing duct 111；
S104, vertically it is laid with suction hose 112 in second flushing duct 111：The lower nozzle of the suction hose 112 leans on
The bottom of trench of nearly second flushing duct 111；
S105, the filling stalk in second flushing duct 111, and the stalk wraps up in the suction hose 112；
S106, irrigation liquid：The irrigation liquid in first flushing duct 110, after the flushing liquor completely infiltration,
Perfusion neutral water in first flushing duct 110；
S107, above-mentioned neutral water and the flushing liquor of excess are collected in the second flushing duct 111, and passes through water pump 113 and discharge in time.
In S101, the original soil infiltration can be infiltrated by the way of rain making, can also use what is manually sprayed
Mode, step include：
It is the sprinkling irrigation of 30 days to carry out the cycle, and every sprinkling irrigation in 5 days once, continuous pouring 4 times allows the moisture of soil absorption abundance；Most
Stop within 10 days pouring afterwards, make the moisture natural diffuseness in soil uniform to reach water content in soil.
The phenomenon that desalination, caking and hardening are generally present with due to salt-soda soil, by being infiltrated to original soil, on the one hand
For isolation band 120 is subsequently set to provide the construction environment of softening, soil moisture content, lifting underground water on the other hand can be promoted
It is reverse osmosis to be so beneficial to underground water for bit line（Signified underground water of the invention refers to the amount of solution contained in soil and reaches saturation position
Solution in place, signified phreatic line reaches the highest level of the soil of saturation for the liquid content in soil in of the invention
Line）.
In S102, isolation band 120 is several along straight the salt-soda soil being processed to be separated into for several parallel arrangements
The steel sheet pile of the pending unit of line arrangement, the steel sheet pile vertically penetrate underground；The isolation being made up of steel sheet pile
With 120 the water between adjacent isolation band 120 is prevented to interpenetrate, it is controllable for flushing dose in subsequent rinsing step and time
Property provide guarantee, i.e., washing time and flushing dose are convenient is calculated according to setting value.
It during due to being infiltrated in S101 to original soil, is oozed under the moisture in soil, former phreatic line is caused to rise to be formed newly
Phreatic line, 2 in figure in le represent new phreatic line；
Horizontal distance between the first flushing duct 110 and the second flushing duct 111 of the pending unit being separated into is L, and L is used
The following formula determines：
L=T×u
Darcy's law：u=k×l
In formula, T --- the design treatment cycle (d)；
The seepage velocity in u --- the salt-soda soil（m/d）；
K --- infiltration coefficient（m/d）；
L --- hydraulic gradient；
Hydraulic gradient refers to the loss of flood peak in unit permeation approach along in water (flow) direction.Underground water will overcome during the motion
Frictional resistance constantly consumes mechanical energy, generates the loss of flood peak, maximum along the grain direction loss of flood peak, and head value declines most fast, water
Head line is the curve of a decline, and the curvature i.e. hydraulic gradient of the point that certain is put on head line.In actually definite hydraulic gradient
When, horizontal length is commonly used instead of the length in penetration route, so the hydraulic gradient calculated with horizontal length is average hydraulic
Gradient.
In formula, k is acquired by testing, and experimental method can be：It is constant head test method, varying head test method(s), method of testing pits, monocyclic
The routine experiment method of this fields such as method or bicyclic method；Certain k also can rule of thumb estimate to obtain, referring specifically to the following table 1.
Table 1 is soil permeability coefficient reference value：
| Soil property | Infiltration coefficient（m/d） |
| Lam | 0.001-0.1 |
| Sandy loam | 0.1-0.5 |
| Flour sand | 0.5-1.0 |
| Fine sand | 1.0-5.0 |
| Middle sand | 5-20 |
| Coarse sand | 20-50 |
| Gravel | 50-150 |
Since alkaline land soil caking is serious, porosity is low, and permeability is poor, and soil property is typically in the range of lam and sandy loam
Between and deviate to lam property, take k=0.1 in the present embodiment；Thus u=k (infiltration coefficient)=0.1 m/d；In the present embodiment
Design treatment cycle T can use 30 days, so as to acquire L as 3 meters.
In S103, for the depth of the second flushing duct 111 to new phreatic line, the depth of the first flushing duct 110 is first
1/3-the 1/2 of flushing duct, and the first flushing duct 110 and the second flushing duct are of same size, across pending unit.
Due to being infiltrated in advance to original soil in S101 so that former phreatic line is able to lifting, for the second punching in the step
The excavation for washing ditch 111 is provided convenience, and is greatly reduced the excavating depth of all second flushing ducts 111 of the step, is reduced quantities；
It is saturation soil layer 100 below new phreatic line, so continues in the first flushing duct 110 after irrigation liquid, new underground water
Bit line can be further up so that underground water can more than instead in the second flushing duct 111；
In order to which the first flushing duct 110 and the second flushing duct 111 is made more to stablize, in the first flushing duct 110 and the second flushing duct 111
One side each away from isolation band 120 is inclined surface 130, which moves closer to isolation band 120 from top to bottom.
In S104, filter element 140 is set in the lower nozzle of suction hose 112, referring to Fig. 3, filter element 140 is made in advance
It makes, is then fitted into 111 bottom of the second flushing duct, which includes：
First filter chamber 160 is encircled by outer filter body 150, which is made by steel plate, the outer layer mistake
Several the first filter chambers of connection 160 and the first extraneous filter hole 170, the bore of first filter hole 170 are set in filter body 150
It is gradually reduced along the direction in export-oriented first filter chamber 160 so that larger soil particle diameter is isolated, while allows part small
The soil of grain size enters in the first filter chamber 160；
Middle level filtering body 180 in the first filter chamber 160, the middle level filtering body 180 set to be enclosed by metal filter screen,
The middle level filtering body 180 is alternately arranged by the filter screen of at least two different pore sizes along the thickness direction of filter screen, such as
It is arranged in the way of large aperture-small-bore-large aperture-small-bore；
And the geotextiles 190 in middle level filtering body 180 are attached at, the nozzle of suction hose 112 stretches into the sky that geotextiles 190 are surrounded
In.In addition to the filter element 140 is enable to bear larger external force, in the space that geotextiles 190 are surrounded and the first mistake
Filter chamber 160 is interior to fill rubble to support.
In S105, stalk can be the one or more in soybean stalk, rice straw or maize straw, which can
To play Water storage, and can play a supporting role to suction hose 112.
In S106, flushing liquor is humic acid（Humic Acid）Aqueous solution is specially humic acid in humic acid water-soluble liquid
Weight concentration be 15%-25%.Humic acid is the larger molecular organics matter being widely present in nature, be widely used in agriculture, woods,
Herd, oil, chemical industry, building materials, medical and health, the every field such as environmental protection, humic acid has higher suction to the anion in soil
Attached ability, reduces salt content, while can promote the formation of soil agreegate, and the salt content changed in soil is excessively high, alkaline
The state of too strong, grogs high degree of dispersion, soil texture difference.
With reference to Fig. 2, following steps are further included, step is carried out between S101 and S102：
Turf 200 is laid on S201, the original soil after infiltration, it is preferable that the turf 200 is herbage.
Both can salt accumulation in soil be reduced with chesson, and herbage withers after rotting to decompose, the organic acid and titanium dioxide of generation
Carbon, which can neutralize, changes alkali；
Since herbage has preferable coverage, reduce the moisture evaporation of soil surface, to reduce the moisture in S101 in step
Evaporation；
In addition, the root system of herbage can reinforce soil, reduce due to washing away for surface water and carry more soil into first
110 and second flushing duct 111 of flushing duct.
In order to reduce surface soil into the first flushing duct 110 and the second flushing duct 111, following steps are further included：
S108, lattice door 201 is installed at the first flushing duct 110 and the second flushing duct 111；
The lattice door 201 includes the water filling port 202 of perforation lattice door 201, and the water filling port 202 is except being used for irrigation
Liquid is additionally operable to through the suction hose 112.
202 upper end of water filling port is connected with water injection pipe 203, water injection pipe 203 can prevent surface water by water filling port 202 into
Enter the first flushing duct 110 or the second flushing duct 111；The nozzle of the water injection pipe 203 is down-set, it is possible to reduce since rainfall is led
Rainwater is caused to enter the first flushing duct 110 and the second flushing duct 111 by the nozzle set upward.
The present invention enables alkaline land soil to soften by original soil infiltration, and convenient follow-up setting, which completely cuts off band and excavates, rinses
Ditch by lifting phreatic line, in irrigation liquid, reduces and is oozed under flushing liquor, more flushing liquors is made to enter needs
The region of flushing, and be conducive to underground water it is reverse osmosis and enter the second flushing duct, facilitate collection, by first irrigation liquid to
The ion in salt-soda soil is absorbed, is then rinsed by neutral water, above-mentioned neutral water and mistake are collected by the second flushing duct
The flushing liquor of amount；The technical program destroys original soil layer small, construction using the method improvement salt-soda soil of physics and chemical synthesis
It measures small, improves and excavate soil due to needing embedded hidden pipe in the prior art, cause the soil refilled relatively soft, soil aperture
Increase, water evaporation rate is accelerated, and soil water storage ability declines, and then causes the easy water shortage of plant, reduces asking for growth result
Topic.
The above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of saline and alkali land improvement method, which is characterized in that include the following steps：
Original soil infiltrates：To the original soil sprinkling irrigation water of pending district, to soften alkaline land soil and lifting phreatic line；
Separate pending unit：Salt-soda soil is separated into multiple pending units by isolation band (120) arranged in parallel,
To carry out independent process to each pending unit；
Excavate flushing duct：The flushing duct include be separately positioned on pending unit opposite sides the first flushing duct (110) and
Second flushing duct (111), the depth of first flushing duct (110) are less than the depth of second flushing duct (111)；
Suction hose (112) is vertically laid in second flushing duct (111)：The lower nozzle of the suction hose (112)
Close to the bottom of trench of second flushing duct (111)；
Irrigation liquid：In the interior irrigation liquid of the first flushing duct (110), after the flushing liquor completely infiltration, in institute
State perfusion neutral water in the first flushing duct (110)；
Above-mentioned neutral water and excessive flushing liquor are collected in the second flushing duct (111), and passes through water pump (113) and discharges in time.
2. a kind of saline and alkali land improvement method according to claim 1, which is characterized in that the isolation band (120) is steel plate
Stake, the steel sheet pile vertically penetrate underground, and the pending unit is enclosed by several steel sheet piles to be set.
A kind of 3. saline and alkali land improvement method according to claim 1, which is characterized in that the first punching of the pending unit
The horizontal distance between ditch and the second flushing duct is washed as L, L is determined using the following formula：
L=T×u
u=k×l
Wherein, T is the design treatment cycle, and u is seepage velocity；K is infiltration coefficient, and l is hydraulic gradient.
4. a kind of saline and alkali land improvement method according to claim 1, which is characterized in that the original soil infiltration includes：
It is the sprinkling irrigation of 30 days to carry out the cycle, and every sprinkling irrigation in 5 days once, continuous pouring 4 times allows the moisture of soil absorption abundance；Most
Stop within 10 days pouring afterwards, make the moisture natural diffuseness in soil uniform to reach water content in soil.
5. a kind of saline and alkali land improvement method according to claim 4, which is characterized in that the original soil infiltration further includes, and adopts
The manually mode of rainfall or by the way of manually spraying.
6. a kind of saline and alkali land improvement method according to claim 1, which is characterized in that described in second flushing duct
(111) vertically it is laid in suction hose (112) step and further includes in,
The filling stalk in second flushing duct (111), and the stalk wraps up the suction hose (112).
7. a kind of saline and alkali land improvement method according to claim 6, which is characterized in that described in second flushing duct
(111) vertically it is laid in suction hose (112) step and further includes in,
In the lower nozzle of suction hose (112), filter element (140) is set, the filter element (140) includes,
First filter chamber (160) is encircled by outer filter body (150), several connections the are set on the outer filter body (150)
One filter chamber (160) and extraneous the first filter hole (170), export-oriented first filter chamber in bore edge of first filter hole (170)
(160) direction in is gradually reduced；
Middle level filtering body (180) in the first filter chamber (160), the middle level filtering body (180) set to be enclosed by filter screen and
Into the middle level filtering body (180) is alternately arranged by the filter screen of at least two different pore sizes along the thickness direction of filter screen；
And the geotextiles (190) in middle level filtering body (180) are attached at, the nozzle of suction hose (112) stretches into geotextiles (190)
In the space surrounded.
8. a kind of saline and alkali land improvement method according to claim 6, which is characterized in that the stalk is soybean stalk, water
One or more in rice straw or maize straw.
9. a kind of saline and alkali land improvement method according to claim 1, which is characterized in that in original soil infiltration and described point
Following steps are added between pending unit step,
Turf (200) is laid on original soil after infiltration.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711411868.0A CN108112294A (en) | 2017-12-23 | 2017-12-23 | A kind of saline and alkali land improvement method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711411868.0A CN108112294A (en) | 2017-12-23 | 2017-12-23 | A kind of saline and alkali land improvement method |
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| CN108112294A true CN108112294A (en) | 2018-06-05 |
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| CN201711411868.0A Pending CN108112294A (en) | 2017-12-23 | 2017-12-23 | A kind of saline and alkali land improvement method |
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| CN109042171A (en) * | 2018-08-17 | 2018-12-21 | 浙江省有色金属地质勘查局 | A kind of system and method for alkaline land improving paddy planting rice |
| CN110896694A (en) * | 2019-12-03 | 2020-03-24 | 清华大学 | Method and matched facility for preventing and treating salinization of surface soil of underground reservoir |
| CN110990753A (en) * | 2019-11-18 | 2020-04-10 | 河海大学 | Method for calculating leaching effect of concealed pipe system |
| CN117019863A (en) * | 2023-08-29 | 2023-11-10 | 大庆永铸石油技术开发有限公司 | Saline-alkali soil improvement system based on microbial treatment |
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Application publication date: 20180605 |