A saline-alkali soil treatment system and method based on an anti-erosion soil anti-seepage salt return layer

Abstract

The application discloses a saline-alkali soil treatment system and method based on an anti-erosion salt-returning blocking layer of anti-erosion soil, which can desalt and alkali-improve the soil of saline-alkali soil to form arable land, block the return of alkali and salt to the formed arable land, separate salt and water from saline-alkali water generated in the desalination and alkali-improvement process of the saline-alkali soil, wash and reuse the obtained water resource, and bury the obtained saline-alkali crystallization for anti-erosion, so that resource recycling is realized in the whole saline-alkali soil treatment process, and no additional pollution is caused to the external environment.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of saline-alkali soil treatment, and relates to a saline-alkali soil treatment system and method based on anti-drainage soil anti-seepage salt return layer blocking. BACKGROUND

[0002] Saline-alkali land treatment should be a systematic project, and a treatment closed loop of blocking salt return, salt water management and saline-alkali management should be formed. Otherwise, saline-alkali water will spread everywhere and pollute soil everywhere.

[0003] In terms of the currently used technologies, soil salinization treatment measures mainly include four categories of tillage layer treatment, crop improvement, underground salt drainage and salt return blocking, and are basically in a disordered state. None of the technologies has systematicness, and there is no technical theory of blocking salt return, salt water management and saline-alkali management, and no corresponding treatment technical system. SUMMARY

[0004] The application aims to provide a saline-alkali soil treatment system and method based on anti-drainage soil anti-seepage salt return layer blocking, which can desalinize and improve saline-alkali soil to form farmland, block salt return of the formed farmland, separate saline-alkali water from salt and water during the desalinization and improvement of saline-alkali soil, wash and reuse the obtained water resources, and bury the obtained saline-alkali crystals, so that resource recycling is realized in the whole saline-alkali soil treatment process, and no additional pollution is caused to the external environment.

[0005] The application is implemented by the following technical scheme:

[0006] A saline-alkali soil treatment system based on anti-drainage soil anti-seepage salt return layer blocking, comprising an anti-drainage soil anti-seepage saline-alkali water storage pool and saline-alkali soil, and further comprising a natural energy saline-alkali water separation device, an anti-drainage soil anti-seepage ditch and an anti-drainage soil landfill part, wherein the top of the anti-drainage soil anti-seepage saline-alkali water storage pool is provided with the natural energy saline-alkali water separation device, the top of a salt accumulation layer of the saline-alkali soil is paved with an anti-drainage soil anti-seepage salt return layer blocking, and the top of the anti-drainage soil anti-seepage salt return layer blocking is paved with a saline-alkali soil layer; the natural energy saline-alkali water separation device transports separated water to the saline-alkali soil layer, and the natural energy saline-alkali water separation device fills separated saline-alkali crystals into the anti-drainage soil landfill part; and the saline-alkali soil layer is connected with the anti-drainage soil anti-seepage saline-alkali water storage pool through the anti-drainage soil anti-seepage ditch.

[0007] The saline-alkali soil is washed to remove salt, and the saline-alkali water obtained in the washing process is discharged to the anti-erosion soil anti-seepage saline-alkali water storage pool through the anti-erosion soil anti-seepage ditch, and the saline-alkali water in the anti-erosion soil anti-seepage saline-alkali water storage pool is heated by using solar energy through the natural energy saline-alkali water separation device, so that the water in the saline-alkali water evaporates to realize the separation of salt and water. The separated water vapor is condensed and liquefied and then returned to the saline-alkali soil to participate in the washing and desalting operation again, and the separated saline-alkali crystals are filled into the anti-erosion soil filling part.

[0008] The top of the salt accumulation layer of the saline-alkali soil is paved with the anti-erosion soil anti-seepage salt return blocking layer, the surface of the anti-erosion soil anti-seepage ditch is paved with the anti-erosion soil anti-seepage salt return blocking layer, and the anti-erosion soil filling part includes the anti-erosion soil anti-seepage salt return blocking layer around the saline-alkali crystals. By arranging the anti-erosion soil anti-seepage salt return blocking layer, the salt return of the salt accumulation layer of the saline-alkali soil can be avoided, the seepage of the saline-alkali water during the transportation along the anti-erosion soil anti-seepage ditch can be avoided, and the seepage of the saline-alkali crystals can be avoided.

[0009] The anti-erosion soil is obtained by mixing the saline-alkali soil mined on site with an anti-erosion soil stabilizer. The anti-erosion soil stabilizer is disclosed in the patent application with the publication number CN104293354B, and its specific components and use method are not repeated here.

[0010] In order to better realize the present application, further, the natural energy saline-alkali water separation device comprises a shed body, the shed body is located at the top of the anti-erosion soil anti-seepage saline-alkali water storage pool, a heat collecting part is arranged on the inner side of the shed body and is inclined to be above the anti-erosion soil anti-seepage saline-alkali water storage pool, a plurality of air holes are arranged in communication between the bottom surface and the top surface of the heat collecting part, a condensation part is arranged above the top surface of the heat collecting part, and a water collecting part is arranged at the low elevation end of the heat collecting part.

[0011] In order to better realize the present application, further, the heat collecting part comprises a mounting frame and a heat absorbing cloth, the mounting frame is arranged in the interior of the shed body in an inclined manner, the high elevation end of the mounting frame is hinged to the shed body, the low elevation end of the mounting frame is provided with the water collecting part, the heat absorbing cloth is arranged between the high elevation end and the low elevation end of the mounting frame, an inclination adjusting device is arranged between the low elevation end of the mounting frame and the top of the shed body, and a lifting device is arranged between the high elevation end of the mounting frame and the top of the shed body.

[0012] In order to better realize the present application, further, the anti-erosion soil anti-seepage salt return blocking layer is arranged in the pool bottom of the anti-erosion soil anti-seepage saline-alkali water storage pool, on the surface of the anti-erosion soil anti-seepage ditch, and around the saline-alkali crystals in the anti-erosion soil filling part.

[0013] A saline-alkali soil treatment method based on the anti-erosion soil anti-seepage salt return blocking layer is realized by using the above-mentioned saline-alkali soil treatment system, and comprises the following steps:

[0014] Step 1, the surface layer of saline-alkali soil is stripped, and an anti-wetting soil anti-seepage salt return layer is applied, the anti-wetting soil anti-seepage salt return layer is prepared from in-situ saline-alkali soil and an anti-wetting soil stabilizer, the content of the anti-wetting soil stabilizer is greater than or equal to 0.01 %, and then the saline-alkali soil is backfilled to the top of the anti-wetting soil anti-seepage salt return layer;

[0015] Step 2, an anti-wetting soil anti-seepage ditch is applied between the saline-alkali soil and the anti-wetting soil anti-seepage saline water storage pool, a natural energy saline water separation device is applied on the top of the anti-wetting soil anti-seepage saline water storage pool, and an anti-wetting soil landfill part is applied in the to-be-cultivated area;

[0016] Step 3, the saline-alkali soil is subjected to saline-alkali washing, and the saline water obtained through washing is discharged to the anti-wetting soil anti-seepage saline water storage pool through the anti-wetting soil anti-seepage ditch;

[0017] Step 4, the saline water in the anti-wetting soil anti-seepage saline water storage pool is separated through the natural energy saline water separation device, the separated water is sent back to the saline-alkali soil to participate in saline-alkali washing, and the separated saline crystallization is filled into the anti-wetting soil landfill part.

[0018] In order to better realize the present application, further, the step 1 specifically comprises:

[0019] Step 1.1, the surface layer of the saline-alkali soil is stripped, then the saline-alkali soil is rotary ploughed downwards, the rotary ploughing depth is 15-20 cm, and the clay content of the soil layer is detected; if the clay content of the soil layer is less than 10 %, clay is added to the soil layer until the clay content of the soil layer is greater than or equal to 10 %;

[0020] Step 1.2, the anti-wetting soil stabilizer is uniformly sprayed into the soil layer of the saline-alkali soil, and the soil layer and the anti-wetting soil stabilizer are mixed, the ratio of the anti-wetting soil stabilizer to the soil layer is greater than or equal to 1:9999;

[0021] Step 1.3, the mixed soil layer is leveled and rolled by using a steel wheel roller, the anti-wetting soil stabilizer is sprayed into the soil layer again during the rolling of the soil layer, and the soil layer is compacted by using a flexible roller to obtain the anti-wetting soil anti-seepage salt return layer

[0022] Then the soil layer is mixed, leveled and compacted to form the anti-wetting soil anti-seepage salt return layer;

[0023] Step 1.4, the saline-alkali soil is backfilled on the top of the anti-wetting soil anti-seepage salt return layer, and the thickness of the saline-alkali soil is greater than or equal to 30 cm.

[0024] In order to better realize the present application, further, the anti-wetting soil anti-seepage salt return layer has a clay content greater than or equal to 10 %, a thickness greater than or equal to 150 mm, a compactness greater than or equal to 95 %, and a permeability coefficient less than or equal to 1x10-6 .

[0025] In order to better realize the present application, further, the construction steps of the anti-erosion soil anti-seepage saline water storage pool are:

[0026] Step A, excavate earthwork to form a pool body, rotary till the soil layer at the bottom of the pool body and spray anti-erosion soil stabilizer, mix and compact the soil layer at the bottom of the pool body to form an anti-seepage base layer of the pool bottom, lay anti-erosion soil on the top of the anti-seepage base layer and spray anti-erosion soil stabilizer, and then mix and compact the anti-erosion soil to form an anti-erosion soil anti-seepage blocking salt return layer of the pool bottom;

[0027] Step B, excavate a ladder-shaped plain soil base layer on one side of the pool body, compact the ladder-shaped plain soil base layer, and compact the anti-erosion soil in layers on the compacted ladder-shaped plain soil base layer to form an anti-erosion soil anti-seepage blocking salt return layer of the slope;

[0028] Step C, excavate a dam body base layer on the other side of the pool body, and compact the anti-erosion soil in layers on the top of the dam body base layer to form a dam body.

[0029] In order to better realize the present application, further, the thickness of each layer of anti-erosion soil compacted on the ladder-shaped plain soil base layer is less than or equal to 200mm, after the anti-erosion soil anti-seepage blocking salt return layer of the slope is compacted, the slope of the anti-erosion soil anti-seepage blocking salt return layer of the slope is 1:3-1:0.5; the thickness of each layer of anti-erosion soil compacted on the dam body base layer is less than or equal to 200mm, and after the dam body is compacted, the two sides of the dam body are cut to make the slope ratio of the two sides of the dam body 1:3-1:1.

[0030] In order to better realize the present application, further, excavate a landfill pit in the area to be tilled, compact anti-erosion soil at the bottom of the landfill pit to form a landfill base layer, backfill saline crystallization on the landfill base layer, then compact anti-erosion soil in the area between the four sides of the saline crystallization and the side wall of the landfill pit, and in the top area of the saline crystallization to form an anti-erosion soil landfill part; the compacted thickness of the anti-erosion soil is 400mm-600mm, the clay content of the anti-erosion soil is greater than or equal to 15%, and the anti-seepage coefficient of the anti-erosion soil is less than or equal to 1x10 -6 -1x10 -8 .

[0031] Compared with the prior art, the present application has the following advantages and beneficial effects:

[0032] The present application is composed of five parts: blocking salt return to protect cultivated land, desalination to improve soil, water and salt transportation to ensure safety, relying on natural separation of water and salt, and sealing saline soil to prevent leakage, which breaks through the technical bottleneck of saline land treatment and forms an innovative saline land treatment closed loop with independent technical theory and corresponding treatment method.

[0033] From the technical system, the existing saline-alkali land treatment system is scattered and independent, and does not form a complete closed-loop process, and the application has technical innovation, independence, integrity and closed-loop, and has the advantages of less investment, fast construction and one-time success;

[0034] From the aspect of blocking the salt return layer, the existing technology uses rigid materials such as lime soil, cement soil, solidified soil, and cement concrete to block the salt return, which has high investment cost, pollutes the soil, blocks the soil respiration, and once the rigid material is broken, the salt blocking effect will be lost. The effect of using ash layer, sand layer, organic fertilizer layer and straw section block layer to block salt return is not good. The construction difficulty of using three cloth and two membrane structure to block salt return is large, and it is easy to be corroded by salt and alkali, block soil respiration and break. The anti-drifting soil anti-seepage salt return blocking layer constructed by the anti-drifting soil does not pollute the environment, does not block the soil respiration and is difficult to break, even if the anti-drifting soil anti-seepage salt return blocking layer is broken, it can heal itself and does not lose the salt blocking function.

[0035] From the saline-alkali water transportation:

[0036] The existing technology mainly uses soil water ditch transportation and cement concrete pipeline transportation to transport saline-alkali water. The soil water ditch will leak during the transportation of saline-alkali water, causing pollution to the surrounding environment. The construction difficulty of cement concrete pipeline transportation is large, and the cost is high. The application uses saline-alkali soil to configure anti-drifting soil, and constructs anti-drifting soil anti-seepage ditch by using anti-drifting soil, which not only effectively prevents the leakage of saline-alkali water during transportation, but also has low construction difficulty and low cost.

[0037] From the saline-alkali water separation and sealing of saline-alkali prevention and treatment leakage:

[0038] The existing technology does not separate and reuse the saline-alkali water, which actually causes waste of water resources and saline-alkali. The application separates the saline-alkali and water in the saline-alkali water by using natural energy, and reuses the separated water to saline-alkali land desalination and washing. The saline-alkali crystallization is buried and stored by the anti-drifting soil filling part for subsequent use, which saves a lot of resources. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 It is a structural schematic view of the saline-alkali soil treatment system;

[0040] Figure 2 It is a structural schematic view of the natural energy saline-alkali water separation device;

[0041] Figure 3 It is a view of A of Figure 2

[0042] Figure 4 It is a view of B of Figure 2 ​a local enlarged view of B of Fig. 1;

[0043] Figure 5 a structural schematic diagram of the anti-repellent soil anti-seepage saline water storage pool;

[0044] Figure 6 a local enlarged view of C of Fig. 1. Figure 5 a local enlarged view of C of Fig. 1.

[0045] Wherein: 1-anti-repellent soil anti-seepage saline water storage pool; 2-saline soil; 3-natural energy saline water separation device; 4-anti-repellent soil anti-seepage ditch; 5-anti-repellent soil filling part; 31-shed; 32-heat collecting part; 33-pore; 34-condensation part; 35-water collecting part; 36-inclination adjusting device; 37-lifting device; 321-heat absorbing cloth. DETAILED DESCRIPTION

[0046] The following detailed description is exemplary in nature and is intended to provide further description of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0047] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0048] For the convenience of description, if the terms "upper", "lower", "left", "right" appear in the present application, they only mean the same direction as the upper, lower, left and right directions of the drawing itself, and do not limit the structure, but only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0049] Part of the term explanation: The terms "mounting", "connecting", "connecting", "fixing" and the like in the present application should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements, or the interaction relationship between two elements; for those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0050] Example 1:

[0051] This embodiment presents a saline-alkali soil treatment system based on anti-abrasive soil seepage prevention and salt return blocking layer, such as... Figure 1 As shown, the system includes a saline-alkali water storage tank 1 with anti-soil seepage prevention and a saline-alkali soil 2, as well as a natural energy saline-alkali water separation device 3, an anti-soil seepage prevention ditch 4, and an anti-soil landfill 5. The natural energy saline-alkali water separation device 3 is installed on the top of the anti-soil seepage prevention and salt return prevention layer of the saline-alkali soil 2. The anti-soil seepage prevention and salt return prevention layer is laid on top of the anti-soil seepage prevention and salt return prevention layer. The saline-alkali soil layer is laid on top of the anti-soil seepage prevention and salt return prevention layer. The natural energy saline-alkali water separation device 3 transports the separated water to the saline-alkali soil layer. The natural energy saline-alkali water separation device 3 also landfills the separated salt and alkali crystals into the anti-soil landfill 5. The saline-alkali soil layer is connected to the anti-soil seepage prevention and saline-alkali water storage tank 1 through the anti-soil seepage prevention ditch 4.

[0052] like Figures 2-4 As shown, the natural energy saline-alkali water separation device 3 includes a shed 31, which is located on top of the anti-seepage saline-alkali water storage tank 1. A heat collection part 32 is inclinedly arranged on the inner side of the shed 31 above the anti-seepage saline-alkali water storage tank 1. A number of air holes 33 are densely arranged between the bottom and top surfaces of the heat collection part 32. A condensation part 34 is arranged above the top surface of the heat collection part 32. A water collection part 35 is arranged at the lower end of the heat collection part 32.

[0053] The heat collection unit 32 includes a mounting frame and a heat-absorbing cloth 321. The mounting frame is inclinedly arranged inside the shed body 31. The high end of the mounting frame is hinged to the shed body 31. A water collection part 35 is provided at the low end of the mounting frame. The heat-absorbing cloth 321 is provided between the high end and the low end of the mounting frame. An angle adjustment device 36 is provided between the low end of the mounting frame and the top of the shed body 31. A lifting device 37 is provided between the high end of the mounting frame and the top of the shed body.

[0054] A top beam is installed at the center line of the top of the inner side of the shed 31. Hinged lugs are installed at both ends of the bottom of the top beam. Hinged shafts are installed at both ends of the elevated end of the mounting frame, and these shafts are hinged to the hinge holes on the hinge lugs, allowing the mounting frame to rotate around the elevated end to adjust the inclination angle of the heat-absorbing cloth 321 on the mounting frame. A water collection section 35 with an opening at the top is installed at the lower end of the mounting frame. The lower end of the heat-absorbing cloth 321 corresponds to the opening at the top of the water collection section 35, allowing condensate to drip down the top surface of the heat-absorbing cloth 321 and be collected in the water collection section 35.

[0055] The tilt adjustment device 36 is connected to the low end of the mounting frame and can drive the low end of the mounting frame to rotate around the high end of the mounting frame, thereby adjusting the tilt angle of the mounting frame. The lifting end of the lifting device 37 is connected to the hinge shaft of the high end of the mounting frame. The height of the heat-absorbing cloth 321 on the mounting frame from the anti-seepage saline-alkali water storage tank 1 can be adjusted by lifting the lifting device 37 in the vertical direction.

[0056] Further, as shown in Figure 3 The high end of the mounting frame is provided with a cloth winding drum, and one end of the heat-absorbing cloth 321 is wound outside the cloth winding drum. When salt and alkali separation is not required, the heat-absorbing cloth 321 is wound outside the cloth winding drum for storage, avoiding the occupation of too much space by the heat-absorbing cloth 321. When salt and alkali separation is required, the heat-absorbing cloth 321 is pulled out of the cloth winding drum, and the low end of the heat-absorbing cloth 321 is pulled to the opening position at the top of the water collecting part 35 and fixed.

[0057] The other parts of this embodiment are the same as those of Embodiment 1, and thus will not be described again.

[0058] Embodiment 2:

[0059] A salt and alkali soil treatment system based on anti-seepage soil anti-seepage and salt return layer blocking, which is improved on the basis of Embodiment 1. The bottom of the anti-seepage salt and alkali water storage pool 1, the surface of the anti-seepage ditch 4, and the anti-seepage soil filling part 5 located around the salt and alkali crystals are all provided with anti-seepage soil anti-seepage and salt return layer blocking.

[0060] The other parts of this embodiment are the same as those of Embodiment 1, and thus will not be described again.

[0061] Embodiment 3:

[0062] A salt and alkali soil treatment method based on anti-seepage soil anti-seepage and salt return layer blocking, which is implemented based on the salt and alkali soil treatment system of Embodiment 1 or 2, and includes the following steps:

[0063] Step 1, stripping the surface layer of the salt and alkali soil 2, and applying anti-seepage soil anti-seepage and salt return layer blocking. The anti-seepage soil anti-seepage and salt return layer blocking is prepared by using in-situ salt and alkali soil and an anti-seepage soil stabilizer. The content of the anti-seepage soil stabilizer is greater than or equal to 0.01%. Then, the salt and alkali soil is backfilled to the top of the anti-seepage soil anti-seepage and salt return layer blocking.

[0064] Step 2, applying the anti-seepage ditch 4 between the salt and alkali soil 2 and the anti-seepage salt and alkali water storage pool 1, applying the natural energy salt and alkali water separation device 3 on the top of the anti-seepage salt and alkali water storage pool 1, and applying the anti-seepage soil filling part 5 in the area to be cultivated.

[0065] Step 3, salt and alkali washing of the salt and alkali soil 2, and discharging the washed salt and alkali water to the anti-seepage salt and alkali water storage pool 1 through the anti-seepage ditch 4.

[0066] Step 4, separating the salt and alkali water in the anti-seepage salt and alkali water storage pool 1 by the natural energy salt and alkali water separation device 3, and returning the separated water to the salt and alkali soil 2 for salt and alkali washing. The separated salt and alkali crystals are filled into the anti-seepage soil filling part 5.

[0067] The other parts of this embodiment are the same as those of Embodiment 1 or 2, and thus will not be described again.

[0068] Embodiment 4

[0069] A saline-alkali soil treatment method based on an anti-dispersive soil anti-seepage salt return layer, which is improved on the basis of Embodiment 3, and step 1 specifically comprises:

[0070] Step 1.1, stripping the surface layer of the saline-alkali soil 2, then rotary plowing the saline-alkali soil 2 downward, the rotary plowing depth being 15-20 cm, and detecting the clay content of the soil layer, if the clay content of the soil layer is less than 10%, adding clay to the soil layer until the clay content of the soil layer is greater than or equal to 10%;

[0071] Step 1.2, uniformly spraying the anti-dispersive soil stabilizer into the soil layer of the saline-alkali soil 2, and mixing the soil layer with the anti-dispersive soil stabilizer, the ratio of the anti-dispersive soil stabilizer to the soil layer being greater than or equal to 1:9999;

[0072] Step 1.3, using a steel wheel roller to level and compact the mixed soil layer, spraying the anti-dispersive soil stabilizer into the soil layer again during the soil layer compaction, and then using a flexible roller to compact the soil layer to obtain an anti-dispersive soil anti-seepage salt return layer

[0073] Then the soil layer is mixed, leveled and compacted to form an anti-dispersive soil anti-seepage salt return layer;

[0074] Step 1.4, backfilling the saline-alkali soil on the top of the anti-dispersive soil anti-seepage salt return layer, the thickness of the saline-alkali soil being greater than or equal to 30 cm.

[0075] The anti-dispersive soil anti-seepage salt return layer has a clay content greater than or equal to 10%, a thickness greater than or equal to 150 mm, a compaction degree greater than or equal to 95%, and a permeability coefficient less than or equal to 1×10 -6 .

[0076] The other parts of this embodiment are the same as those of any one of Embodiments 1-3, and thus will not be described again.

[0077] Embodiment 5

[0078] A saline-alkali soil treatment method based on an anti-dispersive soil anti-seepage salt return layer, which is improved on the basis of Embodiment 3, as shown in Figure 5 , Figure 6 The construction steps of the anti-dispersive soil anti-seepage saline-alkali water storage pool 1 are as follows:

[0079] Step A, excavate earthwork to form the pool body, spin the soil layer at the bottom of the pool body and spray soil stabilizer, mix and compact the soil layer at the bottom of the pool body to form the impermeable base of the pool bottom, lay the anti-erosion soil on the top of the impermeable base and spray the soil stabilizer, and then mix and compact the anti-erosion soil to form the anti-erosion soil impermeable salt return blocking layer of the pool bottom;

[0080] Step B, excavate a ladder-shaped soil base on one side of the pool body, compact the ladder-shaped soil base, and compact the anti-erosion soil in layers on the compacted ladder-shaped soil base to form the anti-erosion soil impermeable salt return blocking layer of the slope;

[0081] Step C, excavate the dam body base on the other side of the pool body, and layer the anti-erosion soil on the top of the dam body base and compact it to form the dam body.

[0082] The thickness of each layer of anti-erosion soil compacted on the ladder-shaped soil base is less than or equal to 200 mm, and after the anti-erosion soil impermeable salt return blocking layer of the slope is compacted, the slope of the anti-erosion soil impermeable salt return blocking layer of the slope is 1:3-1:0.5; the thickness of each layer of anti-erosion soil compacted on the dam body base is less than or equal to 200 mm, and after the dam body is compacted, the slope ratio of the two sides of the dam body is 1:3-1:1.

[0083] Excavate a landfill in the area to be plowed, compact the anti-erosion soil at the bottom of the landfill to form a landfill base, backfill saline crystalline soil on the landfill base, and then compact the anti-erosion soil in the area between the four sides of the saline crystalline soil and the side walls of the landfill, as well as the top area of the saline crystalline soil to form the anti-erosion soil landfill part 5; the compacted thickness of the anti-erosion soil is 400-600 mm, the clay content of the anti-erosion soil is greater than or equal to 15%, and the anti-erosion soil has an impermeability coefficient of less than or equal to 1×10 -6 -1×10 -8 .

[0084] The other parts of this embodiment are the same as any one of embodiments 1-4, and will not be repeated here.

[0085] Example 6:

[0086] A saline-alkali soil treatment method based on an anti-erosion soil impermeable salt return blocking layer:

[0087] (1) Constructing a saline-alkali soil anti-erosion soil impermeable salt return blocking layer

[0088] The surface saline soil layer of saline soil 2 is stripped, and the thickness of the stripped soil layer is greater than or equal to 40 cm. After stripping the surface saline soil layer, the saline soil is mixed and compacted on site by adding the saline soil to the soil stabilizer to form an anti-washing soil anti-seepage blocking salt return layer above the salt accumulation layer of the saline soil 2. The proportion of saline soil in the anti-washing soil anti-seepage blocking salt return layer is 99.9%-99.99%, and the proportion of the soil stabilizer in the anti-washing soil anti-seepage blocking salt return layer is 0.01%-0.1%.

[0089] Specifically,

[0090] After stripping the surface saline soil, the remaining saline soil is rotated and plowed to a depth of 15-20 cm, and the clay content of the saline soil is detected. If the clay content is less than 10%, add clay to the saline soil until the clay content of the saline soil is greater than or equal to 10%. Then spray the saline soil with the soil stabilizer, and mix the saline soil evenly during the spraying process. Then use a steel wheel roller to level and compact the saline soil mixed with the soil stabilizer, and then use a flexible roller to compact the saline soil twice, and spray the saline soil with the soil stabilizer during the two compaction processes to form an anti-washing soil anti-seepage blocking salt return layer. The anti-washing soil anti-seepage blocking salt return layer has a clay content of greater than or equal to 10%, a sand content of greater than or equal to 10%, a thickness of greater than or equal to 150 mm, a compaction degree of greater than or equal to 95%, and a seepage coefficient of less than or equal to 1 x 10 -6 Then the stripped saline soil is backfilled to the top of the anti-washing soil anti-seepage blocking salt return layer.

[0091] (2) Constructing an anti-washing soil anti-seepage saline water storage pool

[0092] Excavate the earthwork to form the pool body, rotate and plow the soil layer at the bottom of the pool body and spray the soil stabilizer, mix and compact the soil layer at the bottom of the pool body to form the anti-seepage base layer of the pool bottom, and the thickness of the anti-seepage base layer is greater than or equal to 200 mm. Spread the anti-washing soil on the top of the anti-seepage base layer and spray the soil stabilizer, then mix and compact the anti-washing soil to form the anti-washing soil anti-seepage blocking salt return layer of the pool bottom, and the thickness of the anti-washing soil anti-seepage blocking salt return layer of the pool bottom is greater than or equal to 200 mm. Excavate a ladder-shaped soil base layer on one side of the pool body, compact the ladder-shaped soil base layer, and compact the anti-washing soil in layers on the compacted ladder-shaped soil base layer to form the anti-washing soil anti-seepage blocking salt return layer of the slope. Excavate the dam base layer on the other side of the pool body, and layer the anti-washing soil on the top of the dam base layer to form the dam body.

[0093] The thickness of each layer of the anti-erosion soil compacted on the stepped soil base layer is less than or equal to 200 mm, and after the anti-erosion soil anti-seepage salt return blocking layer of the slope is formed by compaction, the slope of the anti-erosion soil anti-seepage salt return blocking layer of the slope is made to be 1:3-1:0.5; the thickness of each layer of the anti-erosion soil compacted on the dam body base layer is less than or equal to 200 mm, and after the dam body is compacted, the two sides of the dam body are cut to make the slope ratio of the two sides of the dam body be 1:3-1:1.

[0094] For the pool bottom, before the anti-seepage base layer is constructed, the soft foundation part of the pool bottom is replaced with anti-erosion soil. Then the anti-erosion soil mixed with anti-erosion soil stabilizer is laid on the pool bottom, first using an excavator to divide and roll in the longitudinal and transverse directions, the rolling times in each direction are greater than or equal to 4 times, and then using a loader to roll the anti-erosion soil under load.

[0095] The transition area of the anti-erosion soil of the pool bottom and the bottom of the slope, and the transition area of the anti-erosion soil of the pool bottom and the bottom of the dam body are circular in profile.

[0096] (3) Constructing a natural energy salt and alkali water separation device on the top of the anti-erosion soil anti-seepage salt and alkali water storage pool

[0097] (4) Constructing an anti-erosion soil anti-seepage ditch

[0098] Excavate a foundation ditch between the anti-erosion soil anti-seepage salt and alkali water storage pool 1 and the saline-alkali soil 2, mix the excavated soil with the anti-erosion soil stabilizer to obtain the anti-erosion soil, and fill the anti-erosion soil into the foundation. The anti-erosion soil is directly rammed into an anti-erosion soil anti-seepage ditch by ramming, or the anti-erosion soil is compacted and then opened into an anti-erosion soil anti-seepage ditch by using ditch opening machinery.

[0099] For areas where it is not convenient to use ditch opening equipment, an anti-erosion soil anti-seepage ditch is obtained by stacking anti-erosion soil bags inside the foundation ditch and then ramming the anti-erosion soil bags. The anti-erosion soil bags are stacked in layers from top to bottom, and the layers of adjacent anti-erosion soil bags are fixed longitudinally in series by connecting rods.

[0100] Ensure that the compaction degree of the anti-erosion soil is greater than or equal to 95%, and the anti-seepage coefficient is less than or equal to 1×10 -6 .

[0101] (5) Constructing an anti-erosion soil filling part

[0102] The surface layer of the saline-alkali soil in the area to be cultivated is stripped off to a thickness of 400-600 mm, then the soil is excavated to form a landfill pit, the anti-seepage soil is compacted at the bottom of the landfill pit to form a landfill base, the saline-alkali crystalline is backfilled on the landfill base, then the anti-seepage soil is compacted in the area between the saline-alkali crystalline and the side wall of the landfill pit and the top area of the saline-alkali crystalline to form an anti-seepage soil landfill part 5; the compacted thickness of the anti-seepage soil is 400-600 mm, the clay content of the anti-seepage soil is greater than or equal to 15%, and the anti-seepage coefficient of the anti-seepage soil is less than or equal to 1 x 10 -6 -1 x 10 -8 .

[0103] (6) Water washing of the saline-alkali soil

[0104] The leaching ditches are arranged at intervals on the saline-alkali soil on the top of the anti-seepage soil return salt layer, then the saline-alkali soil is washed with water, the saline-alkali water obtained by the water washing is flowed to the anti-seepage soil anti-seepage saline-alkali water storage pool 1 through the anti-seepage soil anti-seepage ditch 4 for storage, and the saline-alkali and water are separated by the natural energy saline-alkali water separation device 3 on the top of the anti-seepage soil anti-seepage saline-alkali water storage pool 1.

[0105] Specifically,

[0106] The shed body 31 is arranged above the anti-seepage soil anti-seepage saline-alkali water storage pool 1 to form a relatively closed space. The heat energy in the sunlight is quickly collected by the heat collecting part 32, so that the temperature in the shed body 31 is increased to accelerate the evaporation of the water in the saline-alkali water. The water vapor formed by the evaporation escapes to the upper side of the heat collecting part 32 through the air holes 33 on the heat collecting part 32 and contacts the condensing part 34. Since the temperature of the condensing part 34 is lower than that of the water vapor, the water vapor is condensed and liquefied to form liquid drops at the condensing part 34. The liquid drops drop downward to the top surface of the heat collecting part 32 and flow along the inclined top surface to the water collecting part 35 at the edge of the heat collecting part 32 for collection. The collected condensed water is pumped back to the saline-alkali soil 2 for water washing of the saline-alkali soil, and the remaining saline-alkali crystalline in the anti-seepage soil anti-seepage saline-alkali water storage pool 1 is transported to the anti-seepage soil landfill part 5 for landfill.

[0107] The other parts of this embodiment are the same as any one of embodiments 1-5, and will not be described again.

[0108] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Any simple modification or equivalent change made according to the technical essence of the present application to the above embodiment falls within the protection scope of the present application.

Claims

1. A saline-alkali soil treatment system based on an anti-erosion soil anti-seepage salt layer, comprising an anti-erosion soil anti-seepage saline water storage pool (1) and saline-alkali soil (2), characterized in that, Further comprising natural energy saline water separation device (3), anti-wind force soil anti-seepage ditch (4), anti-wind force soil landfill part (5), the top of the anti-wind force soil anti-seepage saline water storage pool (1) is provided with natural energy saline water separation device (3), the top of the salt accumulation layer of the saline soil (2) is paved with anti-wind force soil anti-seepage blocking back salt layer, the top of the anti-wind force soil anti-seepage blocking back salt layer is paved with saline soil layer;The natural energy saline water separation device (3) transports the separated water to the saline soil layer, the natural energy saline water separation device (3) fills the separated saline crystallization to the anti-wind force soil landfill part (5);The saline soil layer is connected with the anti-wind force soil anti-seepage saline water storage pool (1) through the anti-wind force soil anti-seepage ditch (4);The natural energy saline water separation device (3) comprises a shed body (31), the shed body (31) is located at the top of the anti-wind force soil anti-seepage saline water storage pool (1), the inside of the shed body (31) is inclinedly provided with a heat collecting part (32) above the anti-wind force soil anti-seepage saline water storage pool (1), a plurality of air holes (33) are densely and communicatively arranged between the bottom surface and the top surface of the heat collecting part (32), a condensation part (34) is arranged above the top surface of the heat collecting part (32), and a water collecting part (35) is arranged at the low elevation end of the heat collecting part (32);The heat collecting part (32) comprises a mounting frame and a heat absorbing cloth (321), the mounting frame is inclinedly arranged in the inside of the shed body (31), the high elevation end of the mounting frame is hinged to the shed body (31), the water collecting part (35) is arranged at the low elevation end of the mounting frame, and the heat absorbing cloth (321) is arranged between the high elevation end and the low elevation end of the mounting frame;An inclination adjusting device (36) is arranged between the low elevation end of the mounting frame and the top of the shed body (31), and a lifting device (37) is arranged between the high elevation end of the mounting frame and the top of the shed body.

2. The saline soil treatment system based on the anti-repellent soil anti-seepage salt return layer according to claim 1, characterized in that, The bottom of the anti-wind force soil anti-seepage saline water storage pool (1), the ditch surface of the anti-wind force soil anti-seepage ditch (4) and the anti-wind force soil landfill part (5) around the saline crystallization are all provided with anti-wind force soil anti-seepage blocking back salt layer.

3. A saline soil treatment method based on an anti-repellent soil anti-seepage salt return layer blocking layer, implemented based on the saline soil treatment system of claim 1 or 2, characterized in that, The method comprises the following steps: Step 1, stripping the surface layer of the saline soil (2), and applying the anti-wind force soil anti-seepage blocking back salt layer, the anti-wind force soil anti-seepage blocking back salt layer is prepared by using in-situ saline soil and anti-wind force soil stabilizer, and the content of the anti-wind force soil stabilizer is greater than or equal to 0.01%; then backfilling the saline soil to the top of the anti-wind force soil anti-seepage blocking back salt layer; Step 2, applying the anti-wind force soil anti-seepage ditch (4) between the saline soil (2) and the anti-wind force soil anti-seepage saline water storage pool (1), applying the natural energy saline water separation device (3) at the top of the anti-wind force soil anti-seepage saline water storage pool (1), and applying the anti-wind force soil landfill part (5) in the area to be cultivated; Step 3, saline washing of the saline soil (2), and discharging the washed saline water to the anti-wind force soil anti-seepage saline water storage pool (1) through the anti-wind force soil anti-seepage ditch (4). Step 4, separating the saline water in the anti-erosion soil anti-seepage saline water storage pool (1) by the natural energy saline water separation device (3), returning the separated water to the saline soil (2) to participate in the saline washing, and landfilling the separated saline crystallization to the anti-erosion soil landfill part (5).

4. The saline soil treatment method based on the anti-repellent soil anti-seepage salt return layer according to claim 3, characterized in that, The step 1 specifically comprises: Step 1.1, stripping the surface layer of the saline soil (2), then rotary plowing the saline soil (2) downward, the rotary plowing depth is 15-20 cm, and the clay content of the soil layer is detected, if the clay content of the soil layer is less than 10%, add clay to the soil layer until the clay content of the soil layer is greater than or equal to 10%; Step 1.2, uniformly spraying the anti-erosion soil stabilizer into the soil layer of the saline soil (2), and mixing the soil layer with the anti-erosion soil stabilizer, the ratio of the anti-erosion soil stabilizer to the soil layer is greater than or equal to 1:9999; Step 1.3, using a steel wheel roller to level and compact the mixed soil layer, spraying the anti-erosion soil stabilizer into the soil layer again during the compaction of the soil layer, and using a flexible roller to compact the soil layer to obtain an anti-erosion soil anti-seepage salt return blocking layer Then the soil layer is mixed, leveled and compacted to form an anti-erosion soil anti-seepage salt return blocking layer; Step 1.4, backfilling the saline soil on the top of the anti-erosion soil anti-seepage salt return blocking layer, the thickness of the saline soil is greater than or equal to 30 cm.

5. The saline soil treatment method based on the anti-repellent soil anti-seepage salt return layer according to claim 4, characterized in that, The anti-fouling soil anti-seepage salt return layer has a clay content greater than or equal to 10%, a thickness greater than or equal to 150mm, a compaction greater than or equal to 95%, a permeability coefficient less than or equal to 1x10 -6 .

6. The saline soil treatment method based on the anti-repellent soil anti-seepage salt return layer according to claim 3, characterized in that, The construction steps of the anti-erosion soil anti-seepage saline water storage pool (1) are: Step A, excavating the earthwork to form the pool body, rotary plowing and spraying the anti-erosion soil stabilizer on the soil layer at the bottom of the pool body, mixing and compacting the soil layer at the bottom of the pool body to form the anti-seepage base layer of the pool bottom, laying the anti-erosion soil on the top of the anti-seepage base layer and spraying the anti-erosion soil stabilizer, then mixing and compacting the anti-erosion soil to form the anti-erosion soil anti-seepage salt return blocking layer of the pool bottom; Step B, excavating a ladder-shaped plain soil base layer on one side of the pool body, compacting the ladder-shaped plain soil base layer, and compacting the anti-erosion soil in layers on the compacted ladder-shaped plain soil base layer to form the anti-erosion soil anti-seepage salt return blocking layer of the slope; Step C, excavating a dam body base layer on the other side of the pool body, and compacting the anti-erosion soil in layers on the top of the dam body base layer to form the dam body.

7. The method according to claim 3, wherein the method is characterized in that, The thickness of each layer of anti-erosion soil compacted on the ladder-shaped plain soil base layer is less than or equal to 200 mm, after the anti-erosion soil anti-seepage salt return blocking layer of the slope is compacted, the slope of the anti-erosion soil anti-seepage salt return blocking layer of the slope is 1:3-1:0.5; the thickness of each layer of anti-erosion soil compacted on the dam body base layer is less than or equal to 200 mm, after the dam body is compacted, the slope ratio of the two sides of the dam body is 1:3-1:

1.

8. The saline soil treatment method based on the anti-repellent soil anti-seepage salt return layer according to claim 3, characterized in that, In the area to be cultivated, a landfill pit is excavated, and an anti-seepage soil is compacted at the bottom of the landfill pit to form a landfill base, and saline-alkali crystallization is backfilled on the landfill base, and then an anti-seepage soil is compacted in the area between the saline-alkali crystallization and the side wall of the landfill pit, and in the top area of the saline-alkali crystallization to form an anti-seepage soil landfill part (5); the compacted thickness of the anti-seepage soil is 400mm-600mm, the clay content of the anti-seepage soil is greater than or equal to 15%, and the anti-seepage coefficient of the anti-seepage soil is less than or equal to 1×10 -6 -1×10 -8 .

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