CN101387113B - Coastal saline soil improvement method - Google Patents
Coastal saline soil improvement method Download PDFInfo
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- CN101387113B CN101387113B CN2008102113899A CN200810211389A CN101387113B CN 101387113 B CN101387113 B CN 101387113B CN 2008102113899 A CN2008102113899 A CN 2008102113899A CN 200810211389 A CN200810211389 A CN 200810211389A CN 101387113 B CN101387113 B CN 101387113B
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Abstract
The invention relates to a method for improving coastal saline soil. The method comprises the following steps of building an anti-seepage wall to block seawater from infiltrating, cutting off salt supplement source and coordinating with other measures so as to progressively desalt the coastal saline soil and then change the coastal saline soil into arable land. The anti-seepage wall is formed through the following steps that three rows of grouting holes arrayed in a regular triangle are drilled; cement paste is injected into the grouting holes in turn by a grouting pump; the cement paste permeates a rock-soil layer; the grouting speed is controlled; the permeation distance of the cement paste is guaranteed, so as to ensure that the cement paste injected into adjacent grouting holes is closely connected together; after the cement paste is injected into the rock-soil layer, the cement paste is condensed with the rock-soil layer together so as to form the anti-seepage wall which blocks the seawater from infiltrating. The other measures comprise measures of building a seawall, a brine drainage system and a pipeline irrigation system and applying soil conditioner.
Description
Technical field
The present invention relates to soil improvement method, be specifically related to a kind of modification method of marine solonchak, belong to International Classification of Patents A01B technical field.
Background technology
Saline-alkali soil is a kind of soil types that extensively distributes on the earth, and a variety of causes causes a large amount of salt and alkali components to accumulate in soil and forms.Salt and alkali component in the soil comprises different ions, as Cl
-, SO
4 2-, CO
3 2-, HCO
3 -, Na
+, K
+, Ca
2+, Mg
2+Deng, when these ions progressively accumulated concentrations reach when being enough to that soil property and plant growing produced harmful effect, become salt and alkali component.Because the accumulation of a large amount of salt and alkali components causes the deterioration of a series of soil physical properties: structure viscous, aeration is poor, the unit weight height, soil temperature rises slow, and the aerobic microorganism activity is poor in the soil, and nutrient discharges slow, transmission coefficient is low, and capillarity is strong, just causes the saliferous aggravation of topsoil.Can have a strong impact on the growth of plant after the salinization of soil, even plant can't grow.
Marine solonchak is a type of saline-alkali soil, and to be soil be grouped into consistently with seawater with phreatic salt its maximum characteristics one, all is based on sodium chloride, the 2nd, salt content except that table soil much more slightly, following soil layer all compares evenly.Seawater with flood the soil, modes such as the river that traces back pours in down a chimney, seepage recharge groundwater invade soil, bring salt to soil, the salt accumulation causes the salinization of soil of coastal soil.
Along with developing rapidly of economic and society, the population growth becomes increasingly conspicuous with the contradiction that reduces of ploughing, all kinds of saline-alkali soil resources, and particularly coastal saline-alkali soil is in the developed area, as a kind of important soil reserved resources, demands exploitation urgently, utilizes and protection.
In order to develop, utilize coastal saline soil, people take some physical measure, chemical and engineering measure to transform beach saline land, receive certain effect.Seawater floods the soil, can repair dykes and dams and stop; The seawater river that traces back pours in down a chimney, and can build retaining box and stop; But if the infiltration of blocking seawater could not effectively be arranged, that just would be difficult to fundamentally administer coastal saline-alkali soil.
Summary of the invention
Purpose of the present invention is to provide a kind of blocking-up penetration of sea water, cooperates physics and chemical, the method for improvement beach saline land.
The objective of the invention is to be achieved through the following technical solutions.
A kind of coastal saline soil improvement method comprises that building impervious wall blocking-up seawater immerses, blocks the additional source of salt, and cooperates other measure, and marine solonchak is progressively desalinated, and becomes and can plough the soil.That is: the blocking-up penetration of sea water is realized with the way of building impervious wall.
Described impervious wall is arrange to bore three row's injected holes by equilateral triangle, and the distance of adjacent two injected holes is 3～5 meters, the injected hole degree of depth ≮ 5 meter; Inject cement paste successively with grouting pump in injected hole, progressively inject from deep to shallow, cement paste is penetrated in the rock-soil layer, and the control injection speed is guaranteed the cement paste seepage distance, and adjacent two injected hole institute cement injections are closely joined together; Cement paste injection rock-soil layer back condenses in rock-soil layer and forms impervious wall, the infiltration of blocking-up seawater.
The cement of modulation cement paste is the A level or the C level plain edition of regulation among the standard GB 10238-88 " oil well cement ", and the cement quality concentration of cement paste is cement: water=1:0.4～0.6.
Other measure comprises: build sea wall, salt discharge water system, pipeline irrigation system, use soil conditioner.
Coastal saline soil improvement method provided by the present invention is applicable to the transformation in the salt-soda soil, utilize the blocking-up seawater to immerse, block the method that salt replenishes the source, and cooperate other measure, marine solonchak is progressively desalinated, make it to become and can plough the soil, living for the mankind's procreation and mastery provides valuable land resources.
Description of drawings
Fig. 1 is the layout schematic diagram of impervious wall;
Fig. 2 is impervious wall boring layout and cement paste infiltration schematic diagram;
Fig. 3 is the schematic perspective view of impervious wall drill holes and cement paste infiltration.
The specific embodiment
Referring to above-mentioned each accompanying drawing, concrete implementing method of the present invention is as follows.
1, selected plan is transformed the preliminary treatment of marine solonchak:
Selected plan is transformed marine solonchak, if can be flooded by seawater when high tide or can be flooded by the seawater that pour in down a chimney in the river of tracing back, then should build sea wall earlier and stop tidewater or the seawater that pours in down a chimney, and guarantees that the solonchak of selected transformation can not flooded by seawater again.As shown in Figure 1.
2, build impervious wall:
In the sea wall inboard, press equilateral triangle and arrange brill three row's injected holes (as shown in Figure 2), the distance of adjacent two injected holes is 3～5 meters, and concrete distance depends on the seepage distance of cement paste in rock-soil layer, definite by testing, guarantee that adjacent two injected hole institute cement injections closely join together.The injected hole degree of depth ≮ 5 meter (as shown in Figure 3).
Progressively inject cement paste successively from deep to shallow with grouting pump in injected hole, cement paste is penetrated in the rock-soil layer, and the control injection speed is guaranteed the cement paste seepage distance.Cement paste injection rock-soil layer back condenses in rock-soil layer and forms impervious wall, the blocking-up penetration of sea water.
The cement of modulation cement paste is the A level or the C level plain edition of regulation among the standard GB 10238-88 " oil well cement ", and the cement quality concentration of cement paste is cement: water=1:0.4～0.6.
3, build salt discharge water system (physical measure):
In the scope that impervious wall is drawn a circle to approve, build the salt discharge water system of forming by crisscross salt discharge water channel (open channel or closed conduit) and salt discharge well.The salt discharge water channel and the salt discharge well degree of depth are bottom to surface distance ≮ 1.5 meter, and salt discharge water channel and salt discharge well are connected.
4, build fresh water irrigation system (physical measure):
When building the salt discharge water system, build fresh water pipeline irrigation system, the supply desalinization of soil by flooding or leaching and the required fresh water of plant growing.
5, use soil conditioner (chemical):
Use soil conditioner in right amount at the marine solonchak initial stage of transforming, reduce solonchak pH value, reduce the solonchak salt content, transform speed in the hope of accelerating solonchak.
Embodiment:
The somewhere, south, 500 hectares of marine solonchak ground transformation projects.
500 hectares of marine solonchak ground of this project are the formation of reclaiming land from the sea, strip, and north and south on average is about 5000m, and thing is wide about 1000 meters, at the bottom of the Xi Gaodong, about 1 meter of the thing discrepancy in elevation.Near the mouth of the river, be alluviation mud in underground 8 meters.
Construct sea wall when reclaiming land from the sea, stopped that effectively seawater floods, do not needed to rebuild again sea wall.
Three peripheries are built impervious walls in north, east, the south on this marine solonchak ground: from the west, the north, in the east, arrive south again, the west, Zhongdao south press equilateral triangle successively and is arranged brill three and arrange injected holes, and 5 meters of hole depths, the distance of adjacent two injected holes are 5 meters; The timely grout injection in every brill one hole, to avoid hole wall collapse, cement paste is selected A level oil well cement for use with cement, and cement paste proportioning (mass ratio) is cement: water=1:0.45.After about 4200 fill orifices are finished cement paste perfusion, cement paste progressively with on every side mud condensation cure together, form impervious wall.
Impervious wall builds up back excavation salt discharge water system: at first in the east apart from 100 meters of impervious wall, dig dark 2 meters from north orientation Nankai, and the arterial drainage that bottom width is 4 meters, the trunk canal always is about 5000m; Excavate 9 draining branch canal from West to East from the north apart from 500 meters beginnings of impervious wall, 500 meters of branch canal spacings, 2 meters of the dark 2 meters bottom width of branch canal, branch canal is about 950 meters, always is about 8550 meters; In south, north impervious wall, branch canal and total canal surround 10 square plot of 500 meters * 900 meters, excavate the north-south sublateral canal, 1 meter of the dark 2 meters bottom width of sublateral canal, 9 sublateral canals of each square plot excavation, 50 meters of sublateral canal spacings, every sublateral canal is grown 500 meters, 4500 meters of each square plot internal hair canal length overalls; In the soil block that impervious wall and trunk canal are surrounded, from 50 meters beginnings of distance north impervious wall, 99 in excavation East and West direction sublateral canal, 1 meter of the dark 2 meters bottom width of sublateral canal, 50 meters of sublateral canal spacings, long 100 meters of every sublateral canal, 4950 meters of sublateral canal length overalls.In south, trunk canal, the two ends, north, count in 10 meters scopes from the termination, deepen trunk canal to 3 meter formation catch pit, catch pit wall and 0.5 meter thick concrete of end perfusion, in case cave-in is installed the automatic draining of drainage pump on the catch pit limit, guarantee that the water in trunk canal, branch canal, the sublateral canal is lower than 1 meter on ground.In trunk canal, the plot that branch canal, sublateral canal and impervious wall surrounded, level land and repair the furrow ridge as required.Furrow, trunk canal, branch canal, sublateral canal and catch pit are communicated with, and constitute drainage system, guarantee that current are unimpeded.(impervious wall, trunk canal, branch canal, sublateral canal equidimension boundary line are its center line).
The pipe laying irrigation system: arrange aqueduct by the irrigation water capacity requirement, make each have a delivery port at least by impervious wall, trunk canal, plot that branch canal, sublateral canal surrounded, each delivery port water yield is controlled with valve.
Use soil conditioner: according to the salt concentration and the soil extract pH value in each plot, use the soil conditioner that reduces salt concentration and pH value, transform speed to improve solonchak.
Claims (6)
1. coastal saline soil improvement method, concrete implementing method is as follows:
(1), selected plan is transformed the preliminary treatment of marine solonchak:
Selected plan is transformed marine solonchak, if can be flooded by seawater when high tide or can be flooded by the seawater that pour in down a chimney in the river of tracing back, then should build sea wall earlier and stop tidewater or the seawater that pours in down a chimney, and guarantees that the solonchak of selected transformation can not flooded by seawater again;
(2), build impervious wall:
In the sea wall inboard, press equilateral triangle and arrange brill three row's injected holes, the distance of adjacent two injected holes is 3～5 meters, guarantee adjacent two injected hole institute cement injections closely handing-over together, the injected hole degree of depth ≮ 5 meter, in injected hole, progressively inject cement paste successively from deep to shallow with grouting pump, cement paste is penetrated in the rock-soil layer, and the control injection speed is guaranteed the cement paste seepage distance, cement paste injection rock-soil layer back condenses in rock-soil layer and forms impervious wall, the blocking-up penetration of sea water;
(3), build the salt discharge water system:
In the scope that impervious wall is drawn a circle to approve, build the salt discharge water system of forming by crisscross salt discharge water channel and salt discharge well, the salt discharge water channel and the salt discharge well degree of depth are bottom to surface distance ≮ 1.5 meter, and salt discharge water channel and salt discharge well are connected, and described salt discharge water channel is open channel or closed conduit;
(4), build the fresh water irrigation system:
When building the salt discharge water system, build fresh water pipeline irrigation system, the supply desalinization of soil by flooding or leaching and the required fresh water of plant growing.
2. coastal saline soil improvement method according to claim 1 is characterized in that: use soil conditioner in right amount at the marine solonchak initial stage of transforming, reduce solonchak pH value, reduce the solonchak salt content, transform speed in the hope of accelerating solonchak.
3. coastal saline soil improvement method according to claim 1, it is characterized in that: the cement of cement paste that modulation when building impervious wall is injected, be the A level or the C level plain edition of regulation among the standard GB 10238-88 " oil well cement ", the cement quality concentration of cement paste is cement: water=1: 0.4～0.6.
4. according to claim 1 or 3 described coastal saline soil improvement methods, it is characterized in that: described construction impervious wall is: from the west, the north on marine solonchak ground, to in the east, arrive south again, the west, Zhongdao south, press equilateral triangle successively and arrange brill three row's injected holes, 5 meters of hole depths, the distance of adjacent two injected holes is 5 meters, the timely grout injection in every brill one hole is to avoid hole wall collapse, after about 4200 fill orifices are finished the cement paste perfusion, cement paste progressively with on every side mud condensation cure together, form impervious wall.
5. coastal saline soil improvement method according to claim 4, it is characterized in that: after impervious wall built up, the described salt discharge water system of building was: at first in the east apart from 100 meters of impervious wall, dig dark 2 meters from north orientation Nankai, the arterial drainage that bottom width is 4 meters, trunk canal always are about 5000m; Excavate 9 draining branch canal from West to East from the north apart from 500 meters beginnings of impervious wall, 500 meters of branch canal spacings, 2 meters of the dark 2 meters bottom width of branch canal, branch canal is about 950 meters, always is about 8550 meters; In south, north impervious wall, branch canal and total canal surround 10 square plot of 500 meters * 900 meters, excavate the north-south sublateral canal, 1 meter of the dark 2 meters bottom width of sublateral canal, 9 sublateral canals of each square plot excavation, 50 meters of sublateral canal spacings, every sublateral canal is grown 500 meters, 4500 meters of each square plot internal hair canal length overalls; In the soil block that impervious wall and trunk canal are surrounded, from 50 meters beginnings of distance north impervious wall, 99 in excavation East and West direction sublateral canal, 1 meter of the dark 2 meters bottom width of sublateral canal, 50 meters of sublateral canal spacings, long 100 meters of every sublateral canal, 4950 meters of sublateral canal length overalls; In south, trunk canal, the two ends, north, count in 10 meters scopes from the termination, deepen trunk canal to 3 meter formation catch pit, the automatic draining of drainage pump is installed on the catch pit limit, guarantee that the water in trunk canal, branch canal, the sublateral canal is lower than 1 meter on ground; In trunk canal, the plot that branch canal, sublateral canal and impervious wall surrounded, level land and repair the furrow ridge as required, furrow, trunk canal, branch canal, sublateral canal and catch pit are communicated with, and constitute drainage system, guarantee that current are unimpeded.
6. coastal saline soil improvement method according to claim 1, it is characterized in that: the described fresh water irrigation system of building is: arrange aqueduct by the irrigation water capacity requirement, make each have a delivery port at least by impervious wall, trunk canal, plot that branch canal, sublateral canal surrounded, each delivery port water yield is controlled with valve.
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| CN101387113B true CN101387113B (en) | 2011-04-27 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103590370A (en) * | 2013-06-09 | 2014-02-19 | 罗朝钦 | Sea enclosing, draining and land reclaiming construction method |
| CN104695443B (en) * | 2015-01-07 | 2016-08-24 | 中国石油天然气股份有限公司 | A kind of water stop construction technology |
| CN104695442B (en) * | 2015-01-07 | 2016-05-11 | 中国石油天然气股份有限公司 | A kind of water stop constructing device |
| CN106134560A (en) * | 2016-07-01 | 2016-11-23 | 江苏科技大学 | A kind of improve beach saline-alkali ground the polymerization that plants economic crops |
| CN107996056A (en) * | 2017-11-13 | 2018-05-08 | 潍坊友容实业有限公司 | A kind of formula administering method of gathering materials on the spot in Yellow River irrigation salt-soda soil |
| CN108738451B (en) * | 2018-04-26 | 2020-11-10 | 铜仁学院 | Method for improving yield and planting benefit of suitable crops in heavy saline-alkali soil |
| CN110100518B (en) * | 2019-05-25 | 2022-03-18 | 天津泰达园林建设有限公司 | Comprehensive improvement method for seashore saline soil |
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Assignee: NINGBO TAI CHI ENVIRONMENTAL PROTECTION EQUIPMENT CO., LTD. Assignor: Shi Hanxiang Contract record no.: 2011330000727 Denomination of invention: Coastal saline soil improvement method Granted publication date: 20110427 License type: Exclusive License Open date: 20090318 Record date: 20110614 |