Method for treating saline-alkali soil by salt-blocking bag
By digging pits, laying salt-blocking bags and reinforcing them in saline-alkali land, and combining this with mineral-based soil improvement, the problem of frequent soil replacement was solved, resulting in reduced costs for saline-alkali land management and increased soil vitality.
Patent Information
- Application Number
- CN202211301524.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-10-24
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2042-10-24
AI Technical Summary
Existing methods for transforming and utilizing saline-alkali land by replacing soil with new soil consume a lot of manpower and resources, and the soil replacement is frequent, resulting in high treatment costs.
A foundation pit is dug in the saline-alkali land, and after soaking it in fresh water, salt-blocking bags are laid and reinforced. Then, topsoil is backfilled. The salt-blocking bags lock in the salt and are supported by a reinforcement frame. The soil is improved by combining minerals and acidic amendments.
It reduced the cost of saline-alkali land management, extended the duration of topsoil application, reduced the input of manpower and materials, and improved the soil's water retention capacity and nutrient supply.
Smart Images
Figure CN115589805B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of saline-alkali soil treatment, in particular to a method for treating saline-alkali soil by using salt-resistant bags. BACKGROUND
[0002] Soil salinization is a serious problem affecting the ecological environment, and the cause of soil salinization is that the soil and underground contain too much salt. Under the action of strong land evaporation, the shallow underground water is transported to the surface and evaporates, and the salt remains in the surface and shallow soil, which accumulates over time and causes land salinization.
[0003] The common method for transforming and utilizing saline-alkali soil is to replace the soil with guest soil. The method mainly involves digging a planting area about one meter deep and then filling it with guest soil to improve the soil quality of the saline-alkali soil in a short time.
[0004] During the process of transforming and utilizing saline-alkali soil by replacing the soil with guest soil, the shallow underground water will continue to irrigate the soil over time, causing the soil to return to salt. The replaced guest soil also quickly becomes saline soil, requiring frequent replacement of guest soil, which consumes a lot of manpower and resources, thereby increasing the cost of treating saline-alkali soil. SUMMARY
[0005] In order to reduce the cost of treating saline-alkali soil, the present application provides a method for treating saline-alkali soil by using salt-resistant bags.
[0006] The method for treating saline-alkali soil by using salt-resistant bags provided by the present application adopts the following technical solution:
[0007] A method for treating saline-alkali soil by using salt-resistant bags, comprising the following steps:
[0008] Digging a foundation pit, digging a foundation pit at the saline-alkali soil site and removing the original saline-alkali soil;
[0009] Washing salt with fresh water, discharging fresh water into the foundation pit, soaking for one week, and then discharging the water;
[0010] Laying salt-resistant bags, uniformly laying a plurality of salt-resistant bags in the foundation pit;
[0011] Installing a reinforcing frame, installing the reinforcing frame in the foundation pit to reinforce and support the salt-resistant bags;
[0012] Replacing the soil with guest soil, replacing the soil in the foundation pit with guest soil with better soil quality.
[0013] By adopting the technical scheme, the original saline-alkali soil is removed from the saline-alkali land, fresh water is discharged into the foundation pit, the saline-alkali soil is soaked for one week, the water is discharged to reduce the salt content, a plurality of salt-blocking bags are laid in the foundation pit, a reinforcing frame is installed to reinforce and support the salt-blocking bags, the salt-blocking bags are as close as possible to the foundation pit, and finally, the good-quality guest soil is backfilled into the foundation pit. Compared with the traditional guest soil backfilling method, the salt in the original saline-alkali soil can be locked as much as possible by the salt-blocking bags, and other nutrients can penetrate into the new guest soil through the salt-blocking bags. The reinforcing frame can reinforce and support the salt-blocking bags, so that the new guest soil lasts longer, and the labor and material resources are not wasted by frequently replacing the guest soil, thereby reducing the treatment cost of the saline-alkali land.
[0014] In one specific implementation, the salt-blocking bag includes a breathable bag body for transmitting nutrients, and the breathable bag body is sequentially provided with a first water-locking layer, a guest soil layer, a gravel layer, and a second water-locking layer.
[0015] By adopting the technical scheme, the first water-locking layer and the second water-locking layer can lock the water in the saline-alkali soil to the greatest extent to prevent excessive evaporation, the guest soil layer can be used for the growth of plant roots, and the gravel layer can isolate the saline-alkali soil and the guest soil layer. While the salt is blocked as much as possible, the nutrients can penetrate through the breathable bag body.
[0016] In one specific implementation, in the step of installing the reinforcing frame, the reinforcing frame is fixedly installed in the foundation pit, the reinforcing frame includes a bottom plate and a plurality of side plates, the plurality of side plates are connected with each edge of the bottom plate, and the bottom plate and the plurality of side plates are in abutment with the salt-blocking bag.
[0017] By adopting the technical scheme, the salt-blocking bag is fixed in the foundation pit by the side plates and the bottom plate of the reinforcing frame, so that the reinforcing and supporting effect is achieved, and the salt-blocking bag cannot deviate from the position to affect the salt-blocking effect.
[0018] In one specific implementation, the side plates are each provided with a fixing plate, the bottom end of each fixing plate is provided with a pre-buried pile, and the pre-buried pile is buried in the saline-alkali soil; and each pre-buried pile is provided with a plurality of spikes.
[0019] By adopting the technical scheme, the fixing plate is fixed on the saline-alkali land by the pre-buried pile, and the plurality of spikes on the pre-buried pile can help the fixing plate to be more firmly fixed on the saline-alkali land.
[0020] In one specific implementation, the bottom plate and the plurality of side plates are each provided with a through hole, and the through hole is provided with a salt filter layer.
[0021] By adopting the technical scheme, the salt filter layer can perform secondary blocking on the salt content of the saline soil, and in the process of preventing the salt from returning as much as possible, the nutrient elements can also pass through the salt filter layer, thereby activating the vitality of the land.
[0022] In a specific implementation, the hole depth of the through hole is greater than the thickness of the salt filter layer.
[0023] By adopting the technical scheme, the hole depth of the through hole is greater than the thickness of the salt filter layer, so that when the reinforcing frame reinforces and supports the salt blocking bag, the salt blocking bag can be partially extruded into the through hole under pressure without being easily damaged.
[0024] In a specific implementation, the fresh water washing salt, after the fresh water is discharged into the foundation pit and soaked for one week, further comprises:
[0025] Adding mineral substances and acid improvement liquid, the mineral substances and the acid improvement liquid are added into the foundation pit.
[0026] By adopting the technical scheme, after the mineral substances are mixed with the saline soil, the saline soil can be inhibited to a certain extent, the nutrient elements of the subsequent guest soil are given to crops, the heavy metals and other impurities in the soil are adsorbed, and the vitality of the guest soil is activated. The acid improvement liquid can activate the sodium ions in the saline soil by using acid substances, thereby improving the water retention capacity of the saline soil.
[0027] In a specific implementation, the fresh water washing salt, after the fresh water is discharged into the foundation pit and soaked for one week, further comprises:
[0028] Vacuum grouting, the slurry is poured into the foundation pit through the grouting pipe, and a hard layer is formed after the poured slurry is solidified.
[0029] By adopting the technical scheme, when the vacuum degree of the foundation pit is within a certain range, the grouting is performed, and the hard layer formed after the slurry is solidified can organize the salt returning of the saline soil to a certain extent.
[0030] In a specific implementation, after the salt blocking bags are uniformly laid in the foundation pit, the method further comprises:
[0031] Epoxy resin glue is applied between the salt blocking bags, so that the salt blocking bags form a salt blocking bag layer.
[0032] By adopting the technical scheme, the epoxy resin glue is used to fix the salt blocking bags together and form a salt blocking bag layer, which can strengthen the connection strength between the salt blocking bags, so that the salt blocking bags can better play their effect.
[0033] In a specific implementation, after the guest soil is backfilled, the method further comprises:
[0034] After the guest soil is backfilled, the new soil layer is immediately compacted and leveled.
[0035] By adopting the above technical scheme, after the guest soil is backfilled to the foundation pit, the guest soil should be immediately compacted and leveled to ensure the stability of the soil as much as possible.
[0036] In summary, the present application includes at least one of the following beneficial technical effects:
[0037] 1. First, a foundation pit is dug on a saline-alkali soil, the original saline-alkali soil is removed, fresh water is discharged into the foundation pit, soaked for a week, then the water is discharged to reduce the salt content, then a plurality of salt-resistant bags are laid in the foundation pit, then a reinforcing frame is installed to reinforce and support the salt-resistant bags, so that the salt-resistant bags can be as close as possible in the foundation pit, and finally the guest soil is backfilled. Compared with the traditional guest soil replacement method, the salt-resistant bags can lock the salt in the original saline-alkali soil as much as possible, while other nutrients can penetrate into the new guest soil through the salt-resistant bags, and the reinforcing frame can reinforce and support the salt-resistant bags, so that the new guest soil lasts longer, and the labor and resources are not wasted by frequently replacing the guest soil, thereby reducing the cost of saline-alkali soil treatment;
[0038] 2. The first and second water locking layers can lock the water in the saline-alkali soil to the extent possible to prevent excessive evaporation, the guest soil layer can be used for plant root growth, and the gravel layer can isolate the saline-alkali soil and the guest soil layer. While blocking salt as much as possible, nutrients can pass through the air-permeable bag body;
[0039] 3. The mineral mixed with the saline-alkali soil can inhibit the return of salt in the saline-alkali soil to some extent, provide nutrients for crops on the subsequent guest soil, adsorb heavy metals and other impurities in the soil, and activate the vitality of the guest soil. The acid improvement liquid can activate the sodium ions in the saline-alkali soil by using acidic substances to improve the water retention capacity of the saline-alkali soil. BRIEF DESCRIPTION OF DRAWINGS
[0040] Figure 1 is a structural schematic view of the foundation pit in the embodiment of the present application.
[0041] Figure 2 is a sectional view of the foundation pit in the embodiment of the present application.
[0042] Figure 3 is a structural schematic view of the reinforcing frame in the embodiment of the present application.
[0043] Explanation of reference signs: 1, foundation pit; 2, reinforcing frame; 21, bottom plate; 22, side plate; 23, fixed plate; 24, salt isolation layer; 25, fixed pile; 251, conical spike; 26, through hole; 3, salt-resistant bag layer; 4, hard layer. DETAILED DESCRIPTION
[0044] The application will be further described in detail below with reference to the accompanying drawings.
[0045] The application discloses a method for treating saline-alkali soil by using salt-blocking bags. Figure 1 The method comprises the following steps:
[0046] Digging a foundation pit 1, digging a foundation pit 1 with a depth of about 1 meter at the saline-alkali soil and removing the original saline-alkali soil.
[0047] Washing salt with fresh water, discharging fresh water into the foundation pit 1, and discharging the water after soaking for one week, which can effectively reduce the salt content of the saline-alkali soil.
[0048] Adding mineral substances and acid improvement liquid, adding mineral substances and acid improvement liquid into the foundation pit 1, specifically, the mineral substances include desulfurized gypsum, sepiolite and borax, the desulfurized gypsum can improve the saline-alkali soil, the mineral substances mixed with the saline-alkali soil can inhibit the salt return of the saline-alkali soil to a certain extent, provide nutrient elements for the crops planted on the subsequent guest soil, adsorb heavy metals and other impurities in the soil, and activate the vitality of the guest soil. The acid improvement liquid includes amino acid and polylactic acid, the acid substance can activate sodium ions in the saline-alkali soil, so as to improve the soil structure and improve the water retention capacity of the saline-alkali soil.
[0049] Vacuum grouting, when the vacuum degree of the foundation pit 1 is in the range of 10-15 kPa, the slurry is poured into the foundation pit 1 through the grouting pipe, and the poured slurry is solidified to form a hard layer 4 with a thickness of 10 cm. In the implementation, the specific depth of the poured slurry is determined by the construction requirement, and the formation of the hard layer 4 can prevent the salt return of the saline-alkali soil to a certain extent.
[0050] Laying salt-blocking bags, uniformly laying a plurality of salt-blocking bags in the foundation pit 1, specifically, the salt-blocking bag comprises a breathable bag body for transmitting nutrient substances, and the breathable bag body is sequentially provided with a first water-locking layer, a guest soil layer, a gravel layer and a second water-locking layer. In the implementation, the first water-locking layer is a pine needle layer, the second water-locking layer is a straw layer, and the gravel layer is gravel with a diameter of 3-5 cm. The first water-locking layer and the second water-locking layer can lock the water in the saline-alkali soil to a certain extent, and try to prevent excessive evaporation, the guest soil layer can be used for the root growth of plants, and the gravel layer can isolate the saline-alkali soil and the guest soil layer. Nutrient substances can pass through the breathable bag body while salt is blocked as much as possible. Figure 2After the salt-resistant bags are laid, epoxy resin glue is applied between the salt-resistant bags to form a salt-resistant bag layer 3. The epoxy resin glue is used to fix the salt-resistant bags together and form the salt-resistant bag layer 3, which can strengthen the connection strength between the salt-resistant bags, so that the salt-resistant bags can better play their effect. Compared with the traditional replacement of guest soil, the salt-resistant bags can lock the salt in the original saline-alkali soil as much as possible, while other nutrients can penetrate through the salt-resistant bags into the new guest soil. The reinforcing frame 2 can reinforce and support the salt-resistant bags, so that the new guest soil lasts longer, and the labor and material resources are not wasted by frequently replacing the guest soil, thereby reducing the cost of saline-alkali land management.
[0051] The reinforcing frame 2 is installed in the foundation pit 1 to reinforce and support the salt-resistant bags.
[0052] A reinforcing frame 2 is disclosed in this step, which is arranged in the foundation pit 1, and in combination with Figure 2 The reinforcing frame 2 includes a bottom plate 21 and a plurality of side plates 22. The bottom plate 21 is horizontally arranged, and the side plates 22 are vertically arranged. The bottom ends of the plurality of side plates 22 are fixedly connected to each edge of the bottom plate 21. The bottom plate 21 and the plurality of side plates 22 are in contact with the inner side of the salt-resistant bag layer 3. In combination with Figure 3 The top end of each side plate 22 is fixedly connected with a fixed plate 23. Two embedded piles are fixedly installed at the bottom end of each fixed plate 23. Each embedded pile is embedded in the saline-alkali soil. A plurality of spikes 251 are fixedly connected to the outer side wall of each embedded pile. The fixed plate 23 is fixedly arranged on the saline-alkali soil through the embedded piles. The plurality of spikes 251 arranged on the embedded piles can help the fixed plate 23 to be more firmly fixed on the saline-alkali soil. A plurality of through holes 26 are formed in the bottom plate 21 and the plurality of side plates 22. A salt filtering layer for filtering salt is arranged in each through hole 26. The salt filtering layer can further block the salt in the saline-alkali soil. In the process of preventing salt from returning as much as possible, the nutrient elements can also pass through the salt filtering layer, thereby activating the vitality of the soil. The depth of the through hole 26 is greater than the thickness of the salt filtering layer, so that when the salt-resistant bags are reinforced and supported by the reinforcing frame 2, the salt-resistant bags can be partially extruded into the through hole 26 without being easily damaged. The salt-resistant bags are fixed in the foundation pit 1 by the side plates 22 and the bottom plate 21 of the reinforcing frame 2, which can play a reinforcing and supporting role, so that the salt-resistant bags will not deviate from the position and affect the salt-resistant effect.
[0053] The guest soil is backfilled into the foundation pit 1.
[0054] The new soil layer is immediately compacted and leveled after the guest soil is backfilled. After the guest soil is backfilled into the foundation pit 1, the guest soil should be immediately compacted and leveled to ensure the stability of the soil as much as possible.
[0055] The working principle of the embodiment of the present application is that: first, a foundation pit 1 is dug on the saline-alkali soil, the original saline-alkali soil is removed, fresh water is discharged into the foundation pit 1, soaked for a week, and then the water is discharged to reduce the salt content. Then, mineral matter and acid improvement liquid are added to the foundation pit 1 to improve the soil quality of the saline-alkali soil. Then, vacuum grouting is performed on the foundation pit 1 to form a hard layer 4 in the foundation pit 1. Then, a plurality of salt-resistant bags are laid in the foundation pit 1, and then a reinforcing frame 2 is installed to reinforce and support the salt-resistant bags, so that the salt-resistant bags can be as close as possible to the inside of the foundation pit 1. Finally, the guest soil is backfilled and compacted and flattened, and the guest soil with good soil quality is backfilled into the foundation pit 1 and immediately compacted and flattened. Compared with the traditional guest soil replacement method, the salt in the original saline-alkali soil can be locked as much as possible by using the salt-resistant bag, and other nutrients can penetrate into the new guest soil through the salt-resistant bag. The reinforcing frame 2 can reinforce and support the salt-resistant bag, so that the new guest soil can last longer, and the manpower and material resources are not wasted by frequently replacing the guest soil, thereby reducing the cost of saline-alkali soil treatment.
[0056] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application should be covered within the protection scope of the present application.
Claims
1. A method for treating saline-alkali soil by using a salt-resistant bag, characterized in that, The method comprises the following steps: Digging a foundation pit (1), digging a foundation pit (1) at a saline-alkali soil site and removing the original saline-alkali soil; Fresh water washing salt, discharging fresh water into the foundation pit (1), soaking for one week, then discharging the water, adding mineral substances and acid improvement liquid into the foundation pit (1); Vacuum grouting, pouring slurry into the foundation pit (1) through a grouting pipe, and forming a hard layer (4) after the poured slurry is solidified; Laying salt-resistant bags, uniformly laying a plurality of salt-resistant bags in the foundation pit (1); the salt-resistant bag comprises a breathable bag body for transmitting nutrient substances, and a first water-locking layer, a guest soil layer, a gravel layer and a second water-locking layer are sequentially arranged in the breathable bag body; Installing a reinforcing frame (2), and installing the reinforcing frame (2) in the foundation pit (1) to reinforce and support the salt-resistant bags; in the step of installing the reinforcing frame (2), the reinforcing frame (2) is fixedly installed in the foundation pit (1), the reinforcing frame (2) comprises a bottom plate (21) and a plurality of side plates (22), the plurality of side plates (22) are connected with each edge of the bottom plate (21), and the bottom plate (21) and the plurality of side plates (22) are in abutment with the salt-resistant bags; a fixing plate (23) is arranged on each side plate (22), a bottom end of the fixing plate (23) is provided with a pre-buried pile, and the pre-buried pile is buried in the saline-alkali soil; a plurality of spike needles (251) are arranged on each pre-buried pile; A plurality of through holes (26) are formed in the bottom plate (21) and the plurality of side plates (22), a salt filtering layer for filtering salt is arranged in each through hole (26), the salt filtering layer can secondarily block the salt in the saline-alkali soil, and the nutrient elements can pass through the salt filtering layer in the process of preventing salt return, so as to activate the vitality of the land; the depth of the through hole (26) is greater than the thickness of the salt filtering layer, so that when the reinforcing frame (2) reinforces and supports the salt-resistant bags, the salt-resistant bags can be partially extruded into the through hole (26) without being easily damaged; the side plates (22) and the bottom plate (21) of the reinforcing frame (2) fix the salt-resistant bags in the foundation pit (1) to play a reinforcing and supporting role, so that the salt-resistant bags cannot deviate from the position and affect the salt-resistant effect; Guest soil backfilling, backfilling guest soil with better soil quality into the foundation pit (1).
2. The method for treating saline-alkali soil by the salt-resistant bag according to claim 1, characterized in that: After the plurality of salt-resistant bags are uniformly laid in the foundation pit (1), the method further comprises the following steps of: Between the plurality of salt-resistant bags, epoxy resin glue is applied to form a salt-resistant bag layer (3).
3. The method for treating saline-alkali soil by the salt-resistant bag according to claim 1, characterized in that: After the guest soil backfilling, the method further comprises the following step of: Tightening and leveling, timely compacting and leveling the new soil layer after the guest soil backfilling.
Citation Information
Patent Citations
Seedling planting method in alkaline land
CN102498837A
Saline and alkaline land arbor pattern of farming
CN204860389U