CN116590025A

CN116590025A - Soil anti-seepage agent, application thereof and self-adaptive anti-seepage structure

Info

Publication number: CN116590025A
Application number: CN202310882054.4A
Authority: CN
Inventors: 游金海; 张恩宽; 夏艳; 张馨月; 胡锦东; 张凤
Original assignee: Beijing Zhutian Technology Group Co ltd
Current assignee: Beijing Zhutian Technology Group Co ltd
Priority date: 2023-07-18
Filing date: 2023-07-18
Publication date: 2023-08-15

Abstract

The application discloses a soil anti-seepage agent which comprises microbial spores, inorganic calcium compounds, inorganic magnesium compounds and cellulose. Also discloses application of the soil anti-seepage agent. The utility model also discloses a soil seepage prevention structure, including setting up the barrier layer on deep soil, the barrier layer is kept away from the one side of deep soil has sprayed foretell soil seepage prevention agent, and this scheme cost is extremely low and can turn waste into wealth, and is more friendly to the environment, and can realize holistic soil prevention and cure, has solved the problem that current soil seepage prevention technique seepage prevention effect is poor, the efficiency of construction is low.

Description

Soil anti-seepage agent, application thereof and self-adaptive anti-seepage structure

Technical Field

The application relates to a soil anti-seepage agent, application thereof and a self-adaptive anti-seepage structure, and belongs to the field of soil anti-seepage.

Background

The water storage and water holding capacity of the soil is an important index in the occasions such as agricultural planting, sand fixation forestation, irrigation water storage dams, reservoirs, fish ponds, salt fields and the like, but the problem of leakage and loss of water is often encountered in life, especially in recent years, the drought of the soil is more and more increased, the soil is generally concerned by people worldwide, and especially in the areas with uneven rainfall throughout the year and even serious drought-rainfall two-stage differentiation, the water holding capacity of the soil has very important significance for the growth of crops and vegetation.

Various technical and engineering measures are adopted in a targeted way to inhibit soil leakage, and the water retention capacity of the soil can be improved by traditional methods such as thickening soil layers, soil compaction, organic fertilizer application and the like. In addition, when no seepage prevention measures are adopted, the farmland mainly adopts compression irrigation to quantitatively ensure that the irrigation quantity of each time reaches the moist of the soil of the plough layer. The seepage prevention construction is characterized in that the seepage prevention construction is high in cost, is mainly applied to water storage facilities and water delivery engineering bottom and walls in farmlands, namely seepage of pits, ponds, pools, vaults, dams and channels, and is a great problem commonly existing in the application of runoff collection water storage technology. The traditional anti-leakage measures are compacting, ramming, compacting soil, plugging pores, and using 1:5, paving the bottom of the lime soil, and preventing seepage of the pond wall or asphalt, cement and other materials. Modern technology such as the use of polyethylene, polypropylene, butylene rubber, plastic fiber, glass fiber and other chemical materials for seepage prevention, and the application in home and abroad. The leakage in the water delivery process is restrained, and the effective measure is that a pipeline water delivery technology is adopted in the whole process from the water storage facility to the farmland.

In the modern technology, soil is treated by chemical agents such as a soil mixing water retention agent, a soil conditioner and the like, so that the soil moisture is maintained, but ecological influence on the soil for a long time can be generated, including salinization and the like.

For the soil which is quick in surface evaporation or frequent in irrigation, such as drip irrigation, water-retaining agent and the like, the salinization of the soil is easy to occur, firstly, the precipitated salt accumulated in the soil surface due to the quick evaporation cannot be leached into the groundwater, but is accumulated in the soil surface; secondly, because irrigation is carried out frequently, the evaporation capacity of soil moisture and the transpiration capacity of crops are large, and the accumulation of salt to the surface layer of the soil is promoted; thirdly, the excessive fertilization increases the salt content of the soil, especially the excessive acid radical ions of the nitrogenous fertilizer, acidizes the soil, activates some cations, and the acid radical ions and the activated cations gather on the soil surface along with the movement of water; fourthly, the special environment formed by continuous cropping for many years leads the activities of beneficial microorganisms to be limited, harmful bacteria to be active, leads the activities of the beneficial microorganisms to be limited, leads the harmful bacteria to be active, destroys the natural balance of soil microorganisms and inorganic nutrients, and influences the decomposition of fertilizers.

In order to avoid and solve the problem of land salinization, chemical substances such as gypsum, phosphogypsum, calcium sulfite and the like are applied in addition to water conservancy and soil improvement, so that the permeability is reduced, the soil evaporation rate is reduced and the like are improved. However, the investment is large, and the soil-forming action and the loss of the components are required to be continuously applied. In the case of a further problem, the effect of seepage prevention is good by increasing the application amount, and the soil permeability is reduced at the same time, which is disadvantageous to crops.

Common geomembrane impermeable materials include Polyethylene (PE), high Density Polyethylene (HDPE), polyvinyl chloride (PVC), ethylene vinyl acetate copolymer (EVA) and other synthetic materials by adopting a membrane impermeable technology, and in the preparation process, the materials are usually subjected to processes such as melt extrusion, membrane blowing, calendaring and the like. Geomembrane impermeable products of different colors and different specifications are widely used in various projects, for example: HDPE impermeable films, EVA geomembranes, composite geomembranes, double rough-surface HDPE geomembranes and the like. And proper geomembrane materials and specifications are selected, and the seepage prevention effect can be achieved according to different engineering requirements and environmental conditions. The soil film seepage-proofing technology has the excellent performances of water resistance, seepage proofing, corrosion resistance, ageing resistance and the like, and can effectively avoid the problems of water leakage, soil erosion, soil deformation, farmland leakage and the like. However, besides high cost, breakage and difficult repair can also lead to air impermeability of soil, especially a large amount of rainfall can lead to waterlogging, and fertilizer cannot circulate in water, and finally negative influence is caused on the reverse of crops, so that the membrane seepage prevention has been gradually reduced for use.

Soil moisture influences physical and chemical properties and fertility of soil, soil drought resistance can be improved by improving soil water holding capacity, agricultural yield and income increase are promoted, but at present, an anti-seepage technology for improving soil water storage mainly comprises chemical anti-seepage and physical anti-seepage, wherein chemical anti-seepage is mainly used for specific environments, such as an anti-seepage agent for paddy field disclosed by CN100417689C, an anti-seepage agent for agricultural water retention disclosed by CN102977893A, an anti-seepage agent disclosed by CN105084805A and applied to the field of concrete buildings such as roofs, basements and toilets, and an anti-seepage agent for salt lake salt fields disclosed by CN110683823A, firstly, the application range of the anti-seepage agent is greatly limited, or chemical substances which are not used for the soil possibly influencing crops need to be introduced into the soil, or input cost is high, or inorganic salt ions contained in a complex construction or simple inorganic anti-seepage machine can be rapidly reduced along with the effect of the soil, so that anti-seepage effect is greatly reduced.

With respect to physical barrier, i.e., laying polymeric materials in the middle of the soil, but with low construction efficiency, higher laying costs, or changing polymeric materials to more expensive degradable materials, further increases costs.

In addition, there is a weather in which a large amount of precipitation is occasionally concentrated in the farmland, and the seepage prevention technology in the prior art cannot selectively permeate water, so that the defect of waterlogging is overcome when precipitation is concentrated in a short time.

Disclosure of Invention

In order to solve the problems of insufficient seepage prevention effect, difficult material dispersion and transportation, high cost, short duration of a seepage prevention layer, complex construction, difficult repair of damage and the like of the soil seepage prevention technology in the prior art, according to one aspect of the application, a soil seepage prevention agent is provided, which comprises microbial spores, inorganic calcium compounds, inorganic magnesium compounds and cellulose.

The raw material source of the inorganic calcium compound is at least one selected from animal sources, waste sources and mineral sources.

The source of the raw material of the inorganic magnesium compound is at least one selected from sea water desalination solid waste, sewage treatment plant solid waste and minerals.

The microbial spores are selected from at least one of the following bacterial spores: bacillus pasteurii, bacillus sphaericus, bacillus subtilis, and Bacillus alcalophilus.

Optionally, the source of the raw material of the inorganic calcium compound is at least one selected from animal bones, shells, eggshells, chalk, calcite, limestone.

Optionally, the raw material source of the cellulose is at least one selected from straw and kitchen waste.

Alternatively, the microbial spore source is from a strain culture.

Optionally, the source of the microbial spores is at least one selected from activated sludge, solid waste of sewage treatment plants and sludge of rivers and lakes.

Optionally, the mass ratio range of the microbial spores, the inorganic calcium compound, the inorganic magnesium compound and the cellulose is as follows: microbial spores: inorganic calcium compound: inorganic magnesium compound: cellulose=1 (5-50): (0.5-5): (1-100).

Optionally, the mass ratio range of the microbial spores, the inorganic calcium compound, the inorganic magnesium compound and the cellulose is as follows: microbial spores: inorganic calcium compound: inorganic magnesium compound: cellulose=1 (5-20): (0.5-2): (5-20).

Optionally, the mass ratio range of the microbial spores, the inorganic calcium compound, the inorganic magnesium compound and the cellulose is as follows: microbial spores: inorganic calcium compound: inorganic magnesium compound: cellulose=1 (10-15): (1-2): (5-10).

Alternatively, in the soil barrier, the median particle diameter D50 of the inorganic calcium compound and the inorganic magnesium compound is taken from any one of values of 0.5 to 50 μm.

Alternatively, in the soil barrier, the median particle diameter D50 of the inorganic calcium compound and the inorganic magnesium compound is taken from any one of values of 1.5 micrometers to 5 micrometers.

Optionally, in the soil impermeable agent, the median particle diameter D50 of the inorganic calcium compound and the inorganic magnesium compound is less than 3 microns.

The soil anti-seepage agent has the advantage of being available in situ for construction. The microbial spores can be obtained from activated sludge of a sewage treatment plant, preferably aerobic activated sludge or natural river sludge near a construction farmland besides purchasing corresponding biological products. Naturally airing and crushing.

The microorganisms used in the application are all strains existing in natural soil, and are only used intensively, so that the microorganisms have no negative effect on environmental ecology and even can improve soil quality.

The inorganic calcium compound can be obtained by crushing and processing animal bones, shells and collected calcium-containing wastes such as eggshells in rural farmlands besides purchasing corresponding industrial products such as calcium carbonate. The material can be obtained by widely-distributed lime ores, calcites and chalk soil, and is crushed and processed.

The inorganic magnesium compound can be obtained from solid waste of a sewage treatment plant besides purchasing corresponding industrial products such as magnesium carbonate, and the scheme can obtain sources simultaneously with microbial spores, so that the fully reacted aerobic activated sludge can be used as a microbial spore source and an inorganic magnesium compound source simultaneously. The inorganic magnesium compound can be obtained by extracting solid waste and concentrate of sea water desalination facilities in coastal areas and the like, and mainly comprises magnesium carbonate and the like. The median particle diameter required by the application can be obtained by crushing.

The cellulose in the soil anti-seepage agent can be obtained by not only purchasing corresponding cellulose industrial products, but also selecting straws in the farmland in a local material taking mode and crushing; or naturally airing and crushing plant-containing wastes such as kitchen waste and the like.

Therefore, the soil anti-seepage agent provided by the application can realize industrial mass production, can be obtained locally according to the situation of each place, and can be realized by simple mixed processing. Not only has the complete condition of industrialization, but also has the cost advantage. Even the mode of taking the solid wastes such as the biological activated sludge and the straw as the raw materials is adopted, and meanwhile, the additional recovery benefits of the solid wastes can be obtained, the processing cost is compensated, and under the optimal condition, the raw material cost can be solved by 0 yuan. The activity life of the microbial spores is long, and the microbial spores can be automatically repaired after being damaged. These are critical to the industrialization of agricultural technologies to solve the practical problems. Solves the market and industry expectations that low cost solving the problem of farmland seepage prevention has long been desired.

According to another aspect of the application, the application also provides application of the soil anti-seepage agent, which has the advantages of simple construction, difficult material dispersion and transportation, high cost, short duration of an anti-seepage layer, complex construction, water seepage prevention due to concentrated precipitation and the like.

The application of the soil anti-seepage agent provided by the application comprises the following steps:

s1, stripping the soil to be constructed from the surface layer of 5 to 30 cm of soil to expose the working surface to be constructed;

s2, mixing and stirring the soil anti-seepage agent and water according to the mass ratio of 1:5 to 1:20 to obtain a soil anti-seepage agent suspension;

and S3, spraying the soil anti-seepage agent suspension on the working surface to be constructed, obtaining an anti-seepage layer after the suspension is permeated into the soil layer for 5 to 120 minutes, and backfilling the surface layer to cover the anti-seepage layer.

After the step S3 is completed, the soil of the construction working surface is activated by microorganisms in the presence of inorganic calcium compounds, inorganic magnesium compounds and cellulose, and then a compact impermeable layer is gradually formed.

Optionally, in the step S2, sugar accounting for 1 to 5% of the weight of water is added to the mixture of the soil anti-seepage agent and the water to obtain the soil anti-seepage agent suspension.

Alternatively, 5kg to 50kg of the soil barrier is used per square meter of the construction surface.

Further, the anti-seepage agent and the application thereof of the application are characterized in that the step of covering the shielding plate on the working surface to be constructed is added just before spraying the soil anti-seepage agent, and the obtained anti-seepage structure is unexpected, after a period of time, the anti-seepage layer gradually bulges upwards and downwards along the edge of the horizontal direction to expand and deform, so that a cofferdam structure higher than the middle height of the anti-seepage layer is generated, and as shown in figure 4, the structure forms a 'basin' effect of the anti-seepage layer, even if a permeable area is not constructed, enough moisture can be reserved at ordinary times, the soil moisture content is kept, the plant root system is sufficiently supplied, and the anti-seepage effect reaches the expectations. However, in short-time storm, when the soil water-bearing layer exceeds the height of the weir, excessive water can permeate into deep soil beyond the raised cofferdam structure at the edge of the impermeable layer, so that the waterlogging problem generated in the situation by the traditional impermeable technology is effectively avoided.

In the application of the soil anti-seepage agent provided by the application, the step S3 can be as follows:

s3, after the to-be-constructed working surface covers the shielding plate, spraying and covering the to-be-constructed working surface of the shielding plate with the soil impermeable agent suspension, removing the shielding plate, obtaining an impermeable layer after the suspension permeates into a soil layer for 5 to 120 minutes, and backfilling and covering the impermeable layer with a surface layer.

The shielding plate in the step S3 can be obtained from local materials such as wood plates, paperboards, plastic plates and the like.

In the step S3, the shape of the shielding plate may be various shapes such as a circle, a square, a bar, a field letter frame, etc., so as to achieve the effect of spraying the shielding plate and obtain a spraying area with a certain gap.

In the step S3, the width of a single shielding area of the shielding plate is 5-15 cm.

In the step S3, when the shielding plate is in a shape of a circle, a square, a polygon, etc., the area of the single shielding area is 5 square centimeters to 300 square centimeters.

And in the step S3, when the shielding plate is in a strip shape and the like, the shielding width is 5-10 cm.

After the step S3 is completed, the construction working surface is sprayed with soil impermeable agent suspension soil, and a compact impermeable layer is gradually formed after microorganism activation in the presence of inorganic calcium compounds, inorganic magnesium compounds and cellulose.

And after the step S3 is completed for 3 days, forming a compact edge of the impermeable layer along the horizontal direction, and gradually swelling up and down to expand and deform to generate a cofferdam structure higher than the middle height of the impermeable layer.

And 5 to 100 days after the step S3 is finished, the impermeable layer gradually bulges upwards and downwards along the edge in the horizontal direction to expand and deform, and a cofferdam structure higher than the middle height of the impermeable layer is produced.

According to the application scheme of the soil penetrating agent, the cofferdam structure can keep enough water needed by root systems after precipitation or irrigation, maintain a water-containing soil layer with a certain height, and realize that water exceeding the height of the weirs can quickly penetrate into deep soil after excessive irrigation, and crops do not send waterlogging. The technical effects of low-cost local material availability, simple construction, effective seepage prevention and more effective waterlogging risk avoidance are achieved at the same time by accident. In the prior art, the impervious layer can only increase the cost for draining water, and extra equipment and complex construction processes are adopted for secondarily processing the impervious layer to form a drainage ditch, so that the cost is increased, the farmland application threshold is improved, the water retention capacity of surface soil is reduced, and the actual impervious purpose cannot be completely realized.

The unexpected effect produced by the technology of the application is how to simply and effectively solve the contradiction problem of seepage prevention and waterlogging at the same time which is expected for a long time in the aspects of farmland irrigation and fertilization, and the like, and has the industrialization advantage completely because of low cost, simplicity and effectiveness.

According to yet another aspect of the present application, there is also provided a soil adaptive barrier structure comprising a barrier layer disposed on deep soil, the barrier layer being sprayed with the above soil barrier agent on a side thereof remote from the deep soil. The structure can keep the water content of the soil stable when the water content is too high, and the excessive water can be slowly discharged, so that the soil seepage prevention is realized, and adverse effects caused by short-time storm or other reasons are avoided with the lowest cost and the simplest construction.

The application provides a soil seepage prevention structure, which comprises a seepage prevention layer arranged on deep soil, wherein one surface of the seepage prevention layer far away from the deep soil is sprayed with the soil seepage prevention agent as claimed in any one of claims 1 to 5 or is obtained by the application of any one of claims 6 to 8.

Optionally, the soil seepage prevention structure has the characteristics of self-adaptation seepage prevention structure, the barrier has the cofferdam structure of uplift along horizontal direction edge, cofferdam structure top is higher than the height at barrier middle part and be less than the surface of top layer soil and air contact.

Optionally, the impermeable layer is provided with a shielding plate penetrating through the impermeable layer, so that not only is soil impermeable realized, but also excessive water is prevented from causing the upper layer of the impermeable layer to soak.

The phenomenon that the edge is expanded in the process of forming the impermeable structure by biological fermentation in the upper edge area of the soil impermeable layer construction is unexpected in reason, presumably that the growth of bacteria at the edge part is larger than the fermentation advantage, and the structure can also enable plant roots to transversely grow, so that the soil impermeable structure is more beneficial to plants in one year and half year, and the whole soil prevention and control can be realized, the unexpected technical effect is achieved in the implementation, and the soil impermeable structure can be repeatedly and stably generated through verification.

In the present application, the meaning of the particle size distribution index "median particle size D50" (abbreviated as D50) is: the particle size corresponding to a cumulative particle size distribution percentage of one sample reaching 50%. Its physical meaning is that the particle size is greater than 50% of its particles and less than 50% of its particles, also called median or median particle size, D50. Can be measured by a laser particle sizer.

The application has the beneficial effects that:

1) The soil anti-seepage agent provided by the application has the advantages that raw materials can be locally obtained or taken from solid waste materials, the cost is extremely low, waste materials can be changed into valuable materials, the soil anti-seepage agent is more environment-friendly, and the pain point that the input cost is mainly limited to the development of industry is solved;

2) The soil seepage-proofing structure provided by the application has the advantages that the seepage-proofing structures of all areas can be connected into a whole, the integral structure is made, the seepage-proofing effect is better, the construction is simple, the duration time is longer, a stable value can be kept when the water quantity is too high in a short time, and the excessive water can be slowly discharged;

3) According to the soil seepage-proofing structure provided by the application, the shielding plate is arranged in the seepage-proofing layer, the edge area of the seepage-proofing layer can generate the edge expansion phenomenon due to biological fermentation along with the time, the plant roots can transversely grow, the soil seepage-proofing structure is more beneficial to plants in one year and half year, the whole soil prevention and control can be realized, and the technical effect is unexpected, and the soil seepage-proofing structure is found in the implementation and can be stably and repeatedly reproduced.

Drawings

FIG. 1 is a schematic illustration of a spray of an anti-seepage agent during construction in accordance with one embodiment of the present application;

FIG. 2 is a schematic view showing a state after covering surface soil by construction in one embodiment of the present application;

FIG. 3 is a schematic view of a barrier panel disposed in the middle of a barrier layer according to one embodiment of the present application;

fig. 4 is a schematic view of a stable construction state of a soil seepage prevention structure provided with a shielding plate according to an embodiment of the present application.

List of parts and reference numerals:

1. deep soil;

2. surface soil;

3. an impermeable layer;

4. a shielding plate;

5. FIG. 3 shows the water permeable channels formed by the stabilized water permeable soil after construction.

Detailed Description

The present application is described in detail below with reference to examples, but the present application is not limited to these examples.

Unless otherwise specified, the raw materials and the soil moisture content tester in the embodiment of the application are purchased through commercial paths, and the test soil is a representative common black soil cultivated land in Dalian city of Liaoning, north plain, east.

The analysis method in the embodiment of the application is as follows:

and (5) analyzing the water content of the soil by using a soil water content tester, and taking the weight percentage content.

In the embodiment of the application, the soil water content is calculated as follows:

soil moisture = moisture weight/baked soil weight x 100%

The particle diameter distribution index D50 is measured by a laser particle size analyzer.

Example 1 preparation of soil anti-seepage agent

According to one embodiment of the application, a soil anti-seepage agent is provided, and the preparation process is as follows:

taking 1kg of commercial bacillus cereus dry spore powder;

taking 10kg of collected eggshells, crushing, mixing with 1kg of commercially available magnesium carbonate, and grinding by a grinder until the median particle diameter D50 is less than 3 microns;

taking 10kg of the collected dry straw, and crushing the dry straw to a length of not more than 0.5 cm;

mixing all above materials uniformly, and recording as sample 1 ^# 。

Sample 2 was also prepared ^# All the raw materials are taken from 5kg of solid waste aerobic activated sludge dry powder (20% of total microorganisms, most bacillus including bacillus sphaericus, bacillus cereus, bacillus subtilis, bacillus alcalophilus, bacillus barbitarus and the like in dry weight and 11% of magnesium carbonate in dry weight are water treatment sedimentation process products) after sedimentation of a sewage treatment plant of a farm, and after being crushed, the raw materials are mixed and dispersed with 10kg of crushed straws, and then the crushed raw materials are uniformly mixed with 5kg of pig bone powder with the D50 reaching 30 microns. Obtaining sample 2 ^# 。

Likewise, sample 3 was prepared ^# Sample 5 ^# The materials and parameters are shown in Table 1. Wherein the main components of the solid waste of carbonic acid sedimentation after the desalination and concentration of the seawater from magnesium source are magnesium carbonate and calcium carbonate.

TABLE 1

EXAMPLE 2 construction procedure of soil anti-seepage agent

The embodiment provides a construction process step of a soil anti-seepage agent, and the construction method comprises the following steps:

step 101, as shown in fig. 1, soil surface soil 2 is pushed away to both sides, exposing deep soil 110 cm deep.

Step 102, sample 1 according to Table 1 above ^# The soil anti-seepage agent is added with water according to the mass ratio of 1:5 to prepare soil anti-seepage agent suspension, and the suspension is stirred uniformly.

And step 103, spraying the prepared soil impermeable agent suspension onto the upper surface of the deep soil 1 in fig. 1, and forming an impermeable layer 3 after infiltration.

Step 104, after the impermeable layer 3 fully absorbs the moisture, the surface soil 2 is pushed back to the landfill impermeable layer 3. As shown in fig. 2, the impermeable layer 3 is formed 10 cm below the surface soil 2.

The anti-seepage effect 3 days after construction is tested as shown in the following table 2.

TABLE 2

The comparison test shows that the impermeable layer has effective water-retaining effect. Beyond 12 hours, no comparative test was performed due to the apparent evaporation. After 1 year, the test is carried out, and the anti-seepage effect is obvious.

EXAMPLE 3 construction procedure of soil anti-seepage agent

in step 201, as shown in fig. 1, soil surface soil 2 is pushed away to two sides, deep soil 1 of 15 cm depth is exposed, and the surface (position indicated by 3 in fig. 1) of the deep soil 1 is flattened to form a working surface to be constructed.

Step 202, sample 2 according to Table 1 above ^# The soil anti-seepage agent is prepared by adding water into the soil anti-seepage agent according to the mass ratio of 1:10, adding 3% sugar residues of sugar factories into the suspension, uniformly stirring, and standing for 20 minutes at the temperature of 35 ℃.

And 203, spraying the prepared soil impermeable agent suspension onto the upper surface of the deep soil 1 in fig. 1, and forming an impermeable layer 3 after infiltration. Step 204, after the impermeable layer 3 fully absorbs the moisture, the surface soil 2 is pushed back to the landfill impermeable layer 3. As shown in fig. 2, the impermeable layer 3 is formed 10 cm below the surface soil 2.

The anti-seepage effect test after 3 days of construction is similar to that of the embodiment 2.

Example 4 construction procedure of soil adaptive seepage prevention Structure

The embodiment provides a construction process step of a soil self-adaptive seepage-proofing structure, and the construction mode comprises the following steps:

step 301, as shown in fig. 1, pushes the soil surface soil 2 to two sides, exposes the deep soil 1 with a depth of 15 cm, and planarizes the surface (the position indicated by 3 in fig. 1) of the deep soil 1 to form a working surface to be constructed.

Step 302, sample 3 according to Table 1 above ^# The soil anti-seepage agent is prepared by adding water into the soil anti-seepage agent according to the mass ratio of 1:20, adding 5% of crude sugar into the suspension, uniformly stirring, and ventilating and bubbling for 30 minutes at the outdoor temperature of 25 ℃.

In step 303, as shown in fig. 3, a plurality of wooden board shielding plates 4 with the diameter of 10 cm are covered on the upper surface (preferably non-planting position) of the deep soil 1 at intervals, and the prepared soil impermeable agent suspension is sprayed on the upper surface of the deep soil 1 in fig. 1, and after infiltration, an impermeable layer 3 is formed.

Step 304, after the impermeable layer 3 fully absorbs moisture, the surface soil 2 is pushed back to the landfill impermeable layer 3.

After 3 days, the surface soil 2 was gently pulled away with a soft nylon plow to find a dense impermeable layer 3 formed on the lower layer.

After 5 days, the surface soil 2 is gently stirred by a soft nylon plow, the compact impermeable layer 3 formed at the lower layer is found, the edge which is shielded by the shielding plate 4 along the horizontal direction of the impermeable layer 3 is continuously formed by microorganisms by utilizing calcium carbonate, magnesium carbonate, straw cellulose and components, the impermeable tissue formed at the edge gradually bulges up and down to expand and deform, and a cofferdam structure which is higher than the middle height of the impermeable layer, such as the structure of the impermeable layer 3 in fig. 4, is formed at the edge, and the height of the cofferdam structure formed at the edge is more than 5 cm. The soil in the place where the shielding plate 4 is originally covered has no seepage-proofing effect, and a water permeable channel is formed.

The barrier effect is tested as shown in table 3 below.

Table 3 cofferdam structure barrier test

The comparison test shows that the embodiment has obvious seepage prevention and water retention effects, and under the condition of concentrated continuous rainfall or concentrated heavy rain in a large amount of irrigation simulation, the plastic film seepage prevention layer (the plastic film seepage prevention layer has the same effect as the prior art of a water-impermeable layer such as cement) cannot repel excessive water for 24 hours, the water content is not reduced below 30% waterlogging safety line (the water content of the soil is generally 15% -20% in an ideal state), and the soil is dry soil with less than 12% and high water content and has the risk of occurrence of yield reduction for crops which are not resistant to waterlogging. The embodiment can discharge the excess water within 24 hours, but enough water still remained for 48 hours is provided for the crops to grow, and plays an important role in avoiding waste of running water for fertilizer in water.

Beyond 12 hours, no comparative test was performed due to the apparent evaporation. After 1 year, the test is carried out, and the anti-seepage effect is obvious.

Example 5 construction procedure of soil adaptive barrier construction

The embodiment provides a construction process step of a soil self-adaptive seepage-proofing structure, and the construction mode step is similar to that of the embodiment 4, except that the paperboard for the shielding plate is obtained from local materials, and the shape is tested to obtain a plurality of shapes such as a square with a side length of 15 cm, a strip with a width of 10 cm, a field letter frame with a width of 8 cm and the like, so that the effect of spraying the shielding plate is realized, and a spraying area with a certain gap is reserved.

The anti-seepage effect is achieved after 5 days of construction, an anti-seepage layer 3 edge cofferdam structure with the height of more than 5cm is formed on the edge of an anti-seepage layer 3 sprayed with an anti-seepage agent, and the anti-seepage effect is basically stable after one year.

The comparison test shows that the impermeable layer has the function of effectively retaining water and can discharge excessive waterlogging. After 1 year, the test is carried out, and the self-adaptive anti-seepage effect is obvious.

The longitudinal channels between the edge cofferdam structures of the impermeable layer allow harmful soil excessive water exceeding the cofferdam to permeate into the deep soil 1 in the case of disasters such as heavy rain, flood and the like, so that excessive water is prevented from causing the upper layer of the impermeable layer 3 to soak;

meanwhile, the structure can enable plant roots to transversely grow, is more beneficial to plants in one year and half year, can realize integral soil control, and has unexpected technical effects, and the structure is found in implementation and can be stably and repeatedly reproduced.

While the application has been described in terms of preferred embodiments, it will be understood by those skilled in the art that various changes and modifications can be made without departing from the scope of the application, and it is intended to cover the principles of the application as defined in the appended claims.

Claims

1. The soil seepage-proofing agent is characterized by comprising microbial spores, inorganic calcium compounds, inorganic magnesium compounds and cellulose;

the raw material source of the inorganic calcium compound is at least one selected from animal sources, waste sources and mineral sources;

the source of the raw material of the inorganic magnesium compound is at least one selected from sea water desalination solid waste, sewage treatment plant solid waste and minerals;

the microbial spores are selected from at least one of the following bacterial spores: bacillus pasteurii, bacillus sphaericus, bacillus cereus, bacillus subtilis, and Bacillus alcalophilus.

2. A soil conditioner according to claim 1, wherein the source of the inorganic calcium compound is selected from at least one of animal bone, shell, eggshell, chalk, calcite, limestone;

the raw material source of the cellulose is at least one selected from straw and kitchen waste;

the microbial spore is obtained from strain culture or at least one of activated sludge, solid waste of sewage treatment plants and sludge of rivers and lakes.

3. The soil seepage-proofing agent according to claim 1, wherein the mass ratio of the microbial spores, the inorganic calcium compound, the inorganic magnesium compound and the cellulose is in the range of,

the microbial spores are inorganic calcium compounds and inorganic magnesium compounds, wherein cellulose=1 (5-50)/(0.5-5)/(1-100).

4. A soil conditioner according to claim 1, wherein the median particle diameter D50 of the inorganic calcium compound and the inorganic magnesium compound in the soil conditioner is taken from any one of 1.5 to 5 microns.

5. Use of a soil barrier as claimed in any one of claims 1 to 4, comprising the steps of:

6. The use according to claim 5, wherein in step S2, saccharides in an amount of 1 to 5% by weight of water are added to the mixture of soil barrier and water to obtain a soil barrier suspension;

5kg to 50kg of the soil anti-seepage agent is used per square meter of construction surface.

7. The use according to claim 5, wherein S3 is:

s3, after the to-be-constructed working surface is covered with the shielding plate, spraying the soil anti-seepage agent suspension to cover the to-be-constructed working surface of the shielding plate, removing the shielding plate, obtaining an anti-seepage layer after the suspension permeates into a soil layer for 5 to 120 minutes, and backfilling a surface layer to cover the anti-seepage layer;

and after 15 to 100 days after the step S3 is finished, the impermeable layer gradually bulges upwards and downwards along the edge in the horizontal direction to expand and deform, so that a cofferdam structure higher than the middle height of the impermeable layer is produced.

8. A soil-adaptive barrier structure comprising a barrier layer disposed on a deep layer of soil, the barrier layer being sprayed with a soil barrier according to any one of claims 1 to 4 or resulting from the use of any one of claims 5 to 7 on a side remote from the deep layer of soil.

9. The soil adaptive anti-seepage structure according to claim 8, wherein the anti-seepage layer is provided with a cofferdam structure which is raised up and down along the edge of the horizontal direction, and the top end of the cofferdam structure is higher than the middle part of the anti-seepage layer and lower than the surface of the surface layer of the soil contacted with air.