Ecological salt barrier structure and anti-salt backflow method in saline-alkali land

Abstract

The present application relates to an ecological salt-isolating layer structure and a method for preventing salt backflow in saline-alkali land, and relates to the technical field of salt-isolating layer structures. The ecological salt-isolating layer structure in saline-alkali land includes an absorption device and a limiting device; the absorption device includes multiple groups of salt-absorbing mechanisms, all of which are arranged in the foundation pit of the saline-alkali land, and adjacent salt-absorbing mechanisms are abutted against each other to prevent salt in the saline-alkali land from entering the foundation pit; the limiting device includes an abutting mechanism and a retaining mechanism, the abutting mechanism is used to abut all salt-absorbing mechanisms in the foundation pit, and the retaining mechanism is used to position the abutting mechanism in the foundation pit to limit the position of the salt-absorbing mechanism in the foundation pit; the method for preventing salt backflow includes: salt isolation, positioning and salt absorption. The present application has the effect of reducing the phenomenon of salinization of foundation pit backfill soil, and reducing the frequency of frequent re-treatment of foundation pit backfill soil due to salinization.

Description

Technical Field

[0001] The present application relates to the technical field of salt barrier layer structures, and in particular to an ecological salt barrier layer structure in saline-alkali land and a method for preventing salt backflow. Background Art

[0002] Saline-alkali land generally refers to barren land with an alkaline pH and salt content that affects the growth of crops and vegetation. This land has a negative impact on both economic development and the protection of the natural environment, so operators often need to conduct salt isolation and treatment on saline-alkali land.

[0003] In saline-alkali land treatment, operators often dig a certain number of foundation pits on the saline-alkali land. Then, operators fill the foundation pits with normal soil so that the areas filled with normal soil can achieve normal growth of crops and vegetation.

[0004] However, the saline-alkali soil located below and around the foundation pit will reverse salt into the normal soil in the foundation pit. Over time, it is very easy for the normal soil in the foundation pit to become salinized, which will require operators to frequently isolate and treat the area, so it needs to be improved. Summary of the Invention

[0005] In order to improve the problem that the original saline-alkali soil in saline-alkali land will return salt to the normal soil in the foundation pit, the present application provides an ecological salt isolation layer structure and a method for preventing salt return in saline-alkali land.

[0006] In the first aspect, the ecological salt barrier structure for saline-alkali land provided by this application adopts the following technical solutions:

[0007] The ecological salt-isolating layer structure of saline-alkali land includes an absorption device and a limiting device; the absorption device includes multiple groups of salt-absorbing mechanisms, all of which are arranged in the foundation pit of the saline-alkali land, and adjacent salt-absorbing mechanisms are abutted against each other to prevent salt in the saline-alkali land from entering the foundation pit; the limiting device includes an abutting mechanism and a retaining mechanism, the abutting mechanism is used to abut all salt-absorbing mechanisms in the foundation pit, and the retaining mechanism is used to position the abutting mechanism in the foundation pit to limit the position of the salt-absorbing mechanism in the foundation pit.

[0008] By adopting the above technical solution, the absorption device forms an isolation between the original soil of the saline-alkali land and the backfill soil of the foundation pit, so as to reduce the phenomenon that the salt in the original soil of the saline-alkali land enters the backfill soil of the foundation pit and salinizes the backfill soil, thereby helping to reduce the phenomenon that the backfill soil needs to be frequently re-treated due to salinization; the abutment mechanism is positioned in the foundation pit through the retaining mechanism to limit the position stability and application stability of the absorption device in the foundation pit, thereby helping to ensure that the absorption device blocks salt and reduces the phenomenon that salt enters the backfill soil.

[0009] In a specific possible implementation scheme, each group of the salt absorption mechanism includes a deformable core, an external contact piece and a plurality of absorption particles; the deformable core is arranged inside the outer ball, and a preset cavity for installing all the absorption particles is arranged inside the external contact piece and around the outer periphery of the deformable core.

[0010] By adopting the above technical solution, the deformation core drives the deformation of the external contact containing the absorption particles through its own compression deformation, which helps to improve the applicability of the external contact in the foundation pit and ensures the connection tightness of adjacent external contacts after abutment; the external contact is used to absorb salt escaping with water vapor in the original soil of the saline-alkali land, and the inner cavity of the pre-set cavity is used to fill the absorption particles, and the absorption particles are used to absorb the salt-containing water vapor entering the interior of the external contact. After absorbing the salt-containing water vapor, the absorption particles can expand and deform, and lock the salt-containing water vapor firmly inside themselves, so as to reduce the phenomenon of water vapor escaping and salinization of backfill soil.

[0011] In a specific feasible implementation scheme, the abutment mechanism includes a pressing mesh plate, which is used to abut multiple external contacts at the same time; the retaining mechanism includes a positioning screw barrel, a pre-connecting screw rod, an end wristband and a drilling cone head, and the positioning screw barrel is arranged on the pressing mesh plate, and the end wristband and the drilling cone head are respectively arranged at both ends of the length direction of the pre-connecting screw rod; one end of the pre-connecting screw rod with the drilling cone head is threadedly passed through the positioning screw barrel and inserted into the foundation pit, so that the pressing mesh plate presses the external contacts tightly into the foundation pit.

[0012] By adopting the above technical solution, the pressing mesh plate presses multiple external contacts at the same time to limit the displacement of the external contacts in the foundation pit, which helps to ensure the position stability and connection tightness of adjacent external contacts after abutment, and reduces the phenomenon of salt escaping from the gaps between adjacent external contacts; the pre-connected screw thread is passed through the positioning screw barrel and inserted into the foundation pit, so that the pressing mesh plate presses the external contacts tightly against the foundation pit, ensuring the position stability of the external contacts in the foundation pit; the drilling cone head is used to improve the convenience of plugging the pre-connected screw rod in the foundation pit, and the end wrist ring facilitates the operator to quickly screw the pre-connected screw rod.

[0013] In a specific possible implementation scheme, the limiting device also includes a locking mechanism for connecting the pressing mesh plate to multiple external contacts at the same time, and the locking mechanism includes a series component and a locking component; the series component is used to connect multiple external contacts at the same time, and the locking component is used to connect the series component to the pressing mesh plate.

[0014] By adopting the above technical solution, the series component is used to simultaneously connect multiple external contacts, and the locking component is used to simultaneously connect the multiple external contacts connected in series to the pressing mesh plate, thereby fixing the external contacts to the pressing mesh plate, thereby improving the convenience of installing the external contacts on the side wall of the foundation pit, and helping to ensure the position stability of the external contacts limited by the pressing mesh plate in the foundation pit.

[0015] In a specific feasible implementation scheme, the series assembly includes a supporting plate and multiple side connection straps, one end of each side connection strap is connected to the supporting plate, and the other end of each side connection strap is correspondingly connected to an external contact; the locking assembly includes a locking bolt and a tightening nut, the locking bolt is simultaneously passed through the supporting plate and the pressure mesh plate, and tightens the supporting plate to the pressure mesh plate; the tightening nut is threadedly connected to the locking bolt to connect the supporting plate to the pressure mesh plate.

[0016] By adopting the above technical solution, the side connecting straps are used to simultaneously connect the supporting plate and multiple external contacts. After the supporting plate and the pressure mesh plate are abutted against each other, the locking bolts pass through the supporting plate and the pressure mesh plate at the same time, and the fastening nuts are threadedly tightened on the locking bolts to fix the supporting plate and the pressure mesh plate in connection, thereby tightly connecting the pressure mesh plate and the external contacts, ensuring the convenience and stability of the pressure mesh plate in pressing the external contacts into the connection pit.

[0017] In a specific embodiment, the series assembly further includes a contact pad, which is arranged on a side wall of the connecting plate away from the pressing mesh plate, and the contact pad is abutted and fitted between the connecting plate and the external contact.

[0018] By adopting the above technical solution, the contact pad is pressed against the connecting plate and the external contact connected to the connecting plate through its own compression deformation, so as to reduce the connection gap between the connecting plate and the external contact, and cooperate with the connecting plate to seal the gap between adjacent external contacts, thereby helping to reduce the phenomenon of salt passing through the gaps between adjacent external contacts and infecting the backfill soil.

[0019] In a specific feasible implementation scheme, the limiting device also includes a salt storage mechanism, which includes a salt storage arc plate and a plurality of supporting pillars; all the supporting pillars are spaced apart on the side wall of the pressure mesh plate away from the external contact, and the salt storage arc plate is arranged at one end of all the supporting pillars away from the pressure mesh plate; a salt storage cavity is provided inside the salt storage arc plate, and a salt guide channel connected to the salt storage cavity is also provided through the side wall of the salt storage arc plate facing the pressure mesh plate.

[0020] By adopting the above technical solution, the salt storage arc plate is installed on the side of the pressure mesh plate away from the external contact through the supporting pillar. After some salt-containing water vapor passes through the pressure mesh plate, it is blocked by the salt storage arc plate and enters the salt storage cavity through the salt guide channel. It is finally accumulated in the low-level cavities at both ends of the length direction of the salt storage arc plate, effectively reducing the escape of salt and the contamination of backfill soil, causing the backfill soil to be salinized.

[0021] In a specific possible implementation scheme, the salt storage mechanism further includes an external connecting tube and an internal sealing cover, wherein one end of the external connecting tube is passed through the salt storage cavity, and the internal sealing cover is arranged at the other end of the external connecting tube to seal the end of the external connecting tube away from the salt storage cavity, or to connect the salt storage cavity with the atmosphere through the external connecting tube.

[0022] By adopting the above technical solution, the external connecting pipe is used to connect the low-level cavities at both ends of the salt storage cavity in the length direction to the outside atmosphere, thereby facilitating the operator to suck out the salt in the salt storage cavity through the suction device; the inner sealing cover is used to seal the external connecting pipe, so that the end of the external connecting pipe away from the salt storage arc plate is in a sealed state, thereby reducing the phenomenon of external water vapor entering the salt storage cavity through the external connecting pipe.

[0023] In a second aspect, the present application also provides a method for preventing salt backflow in an ecological salt barrier structure of saline-alkali land, the method comprising the following steps:

[0024] Salt isolation: The salt absorption mechanism is spread in the foundation pit dug in the saline-alkali land to prevent the original soil of the saline-alkali land from directly contacting the backfill soil in the foundation pit, thereby reducing the salt in the original soil of the saline-alkali land from entering the backfill soil through water vapor surge;

[0025] Positioning: The salt absorbing mechanism is abutted against the foundation pit by the abutment mechanism, and then the abutment mechanism is positioned on the foundation pit by the retaining mechanism, so as to limit the position of the salt absorbing mechanism in the foundation pit and ensure the position stability and application stability of the salt absorbing mechanism in the foundation pit;

[0026] Salt absorption: The salt in the original soil of saline-alkali land is absorbed by the salt absorption mechanism to reduce the phenomenon of salt escaping into the foundation pit and salinizing the backfill soil.

[0027] By adopting the above technical solution, operators can quickly and efficiently install the salt-isolating layer structure inside the foundation pit. The salt-isolating layer structure can effectively reduce the phenomenon of salt in the original soil of the saline-alkali land entering the backfill soil of the foundation pit, thereby helping to reduce the phenomenon of backfill soil needing frequent re-treatment due to salinization.

[0028] In summary, this application has the following beneficial technical effects:

[0029] 1. The absorption device forms an isolation between the original soil of the saline-alkali land and the backfill soil of the foundation pit, thereby reducing the phenomenon of salt in the original soil of the saline-alkali land entering the backfill soil of the foundation pit and salinizing the backfill soil, thereby helping to reduce the need for frequent re-treatment of the backfill soil due to salinization;

[0030] 2. The external contact is used to absorb salt that escapes with water vapor from the original soil of saline-alkali land. The inner cavity of the pre-set cavity is used to fill absorption particles. The absorption particles are used to absorb the salt-containing water vapor that enters the internal part of the external contact. After absorbing the salt-containing water vapor, the absorption particles can expand and deform, and lock the salt-containing water vapor firmly inside themselves, so as to reduce the phenomenon of water vapor escaping and salinization of backfill soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic structural diagram of the ecological salt barrier structure of saline-alkali land in Example 1 of the present application;

[0032] Figure 2 is a schematic cross-sectional view of the salt absorption structure in Example 1 of the present application along the vertical direction;

[0033] Figure 3 This is a schematic structural diagram for illustrating the retaining mechanism in Example 1 of the present application;

[0034] Figure 4 This is a schematic structural diagram of the ecological salt barrier structure of saline-alkali land in Example 2 of the present application;

[0035] Figure 5 This is an exploded schematic diagram used to illustrate the connection relationship between the external contact and the pressing mesh plate in Example 2 of the present application;

[0036] Figure 6 It is a schematic cross-sectional view in the vertical direction used to illustrate the salt storage arc plate in Example 2 of the present application.

[0037] Description of reference numerals:

[0038] 1. Absorption device; 11. Salt absorption mechanism; 111. Deformation core; 112. External contact; 1121. Pre-set cavity; 113. Absorption particles; 2. Limiting device; 21. Abutment mechanism; 211. Pressing mesh plate; 22. Retention mechanism; 221. Alignment screw; 222. Pre-connected screw rod; 223. End bracelet; 224. Drilling cone head; 23. Positioning mechanism; 24. Salt storage mechanism; 3. Series assembly; 31. Connecting plate; 32. Side connection strap; 33. Contact pad; 4. Locking assembly; 41. Locking bolt; 42. Tightening nut; 5. Salt storage arc plate; 51. Salt storage cavity; 52. Salt guide channel; 6. Support pillar; 7. External connecting pipe; 8. Inner cover. DETAILED DESCRIPTION

[0039] The embodiments of the present application disclose an ecological salt barrier structure of saline-alkali land.

[0040] The following is combined with Figure 1-6 This application is described in further detail.

[0041] Example 1

[0042] Reference Figure 1 The ecological salt barrier structure of the saline-alkali land includes an absorption device 1 and a limiting device 2. The absorption device 1 and the limiting device 2 are both arranged in a foundation pit excavated in the saline-alkali land, wherein the absorption device 1 further includes multiple sets of salt absorption mechanisms 11. The salt absorption mechanisms 11 can be arranged on the inner bottom wall and the side walls of the foundation pit to block the original soil of the saline-alkali land from the backfill soil of the foundation pit, making it difficult for the original soil of the saline-alkali land to directly contact the backfill soil, thereby reducing the phenomenon of salt from the original soil of the saline-alkali land spreading into the backfill soil.

[0043] Reference Figure 1 and Figure 2 In this embodiment, the description is based on the salt absorbing mechanism 11 being laid on the inner bottom wall of the foundation pit. If there are any differences in the salt absorbing mechanism 11 set on the side wall of the foundation pit, additional explanation will be given. Each set of salt absorbing mechanisms 11 includes a deformable core 111, an external contact 112 and a plurality of absorbing particles 113, wherein the deformable core 111 can be a solid rubber ball with a flexible texture and easy to deform. The deformable core 111 can be quickly compressed and deformed when under pressure. The external contact 112 can be a solid spherical sponge. The deformable core 111 is pre-installed inside the external contact 112, and then contacts the soil through the external contact 112. When the external contact 112 is under pressure, both the deformable core 111 and the external contact 112 can be deformed to change their own shapes.

[0044] Reference Figure 2 Absorbent particles 113 can be granular water-absorbing resin, capable of absorbing 100 times its own weight in water. After absorbing water, the water-absorbing resin readily expands to form a hydrogel, and even after pressurization, the hydrogel has difficulty separating the absorbed water. A pre-installed cavity 1121 is provided within the outer contact 112, surrounding the outer periphery of the deformable core 111. All the water-absorbing resin is pre-installed within this cavity 1121.

[0045] Reference Figure 2 , the external contacts 112 are paved in the foundation pit, and the adjacent external contacts 112 abut against each other to form a dense isolation layer in the foundation pit. All the external contacts 112 paved in the foundation pit are used to isolate the original soil of the saline-alkali land from the backfill soil of the foundation pit, thereby reducing the salinization of the backfill soil by reducing the contact between the salt content of the original soil of the saline-alkali land and the backfill soil, and reducing the need for frequent re-treatment of the backfill soil area due to salt backflow. In addition, the external contacts 112 can absorb the salt that escapes from the original soil of the saline-alkali land with the help of water vapor through the water absorption properties of the sponge itself. The salt that enters the external contacts 112 is absorbed by the water-absorbing particles and retained in the hydrogel formed after the water-absorbing particles absorb water, thereby further reducing the phenomenon of salt entering the backfill soil and salinizing the backfill soil.

[0046] Reference Figure 1 and Figure 3The limiting device 2 is used to limit the position of the external contact 112 in the foundation pit. The limiting device 2 includes an abutting mechanism 21 and a retaining mechanism 22, wherein the abutting mechanism 21 further includes a pressing mesh plate 211. In this embodiment, the pressing mesh plate 211 can be a mesh fiber, which is a degradable material. The pressing mesh plate 211 can be freely degraded in the soil and will not produce link pollution. A pressing mesh plate 211 can simultaneously press all the external contacts 112 on the bottom wall of the foundation pit, or can simultaneously press all the external contacts 112 on any side wall of the pit. By pressing the mesh plate 211 against all the external contacts 112 located on the bottom wall of the pit at the same time, the position stability of adjacent external contacts 112 after abutment is ensured, thereby reducing the phenomenon of gaps between adjacent external contacts 112 caused by the displacement of the external contacts 112 and causing salt to enter the backfill soil.

[0047] Reference Figure 3 The retaining mechanism 22 is provided on the pressing mesh plate 211 to position the pressing mesh plate 211 in the foundation pit. The retaining mechanism 22 comprises a positioning screw barrel 221, a pre-screw rod 222, an end ring 223, and a drilling cone 224. The positioning screw barrel 221 is a cylinder with a threaded groove on the inner side wall. The positioning screw barrel 221 is welded to the outer peripheral wall of the pressing mesh plate 211, and one end of the positioning screw barrel 221 abuts against the inner bottom wall or side wall of the foundation pit.

[0048] Reference Figure 3 The pre-connecting screw rod 222 is threadedly adapted to the positioning screw barrel 221, and the end bracelet 223 and the drilling cone head 224 are respectively welded to the two ends of the length direction of the pre-connecting screw rod 222. The operator screws the pre-connecting screw rod 222 through the end bracelet 223, so that the end of the pre-connecting screw rod 222 with the drilling cone head 224 is threaded through the positioning screw barrel 221 and inserted into the inner bottom wall or side wall of the foundation pit, thereby making the pressure-resistant mesh plate 211 stably positioned in the foundation pit, ensuring the position stability of the external contact 112 in the foundation pit. At the same time, by pressing against the mesh plate 211, pressure is applied to all the external contacts 112 at the same time. The external contacts 112 are compressed and deformed after being subjected to the force, and the deformation core 111 located inside the external contacts 112 is also compressed and deformed, so that the adjacent external contacts 112 are flattened and abutted more tightly, which helps to reduce the gaps between adjacent external contacts 112 and ensure the effect of the external contacts 112 in isolating salt between the original soil and backfill soil in the saline-alkali land.

[0049] The implementation principle of the ecological salt-isolating layer structure for saline-alkali land in the embodiment of the present application is as follows: a plurality of external contacts 112 are laid in the foundation pit, pressed against the mesh plate 211 and simultaneously abut against all the external contacts 112 located on the bottom wall or side wall of the foundation pit, as the pre-connected wire rod 222 with a drilling cone head 224 is threaded through the alignment screw 221 at one end and inserted into the foundation pit, pressed against the mesh plate 211 and positioned in the foundation pit, each external contact 112 with a deformation core 111 is deformed after being pressed against the mesh plate 211. At this time, adjacent external contacts 112 are tightly abutted to form an isolation layer in the foundation pit for isolating the original soil of the saline-alkali land and the backfill soil of the foundation pit, thereby reducing the phenomenon of salt in the original soil of the saline-alkali land entering the backfill soil and salinizing the backfill soil, greatly reducing the phenomenon of frequent treatment required due to salinization of the backfill soil.

[0050] In addition, the external contact 112 can absorb the salt that escapes outward from the original soil of the saline-alkali land with the help of water vapor through the water absorption property of its own material. The water-absorbing particles located in the preset cavity 1121 can quickly form a hydrogel by absorbing water vapor to firmly lock the water vapor containing salt, thereby reducing the phenomenon of backfill soil being contaminated by salt and becoming salinized, and thus reducing the frequency of backfill soil needing to be treated due to salinization.

[0051] Example 2

[0052] The difference between Example 2 of the present application and Example 1 is that, referring to Figure 4 The limiting device 2 also includes a locking mechanism 23 and a salt storage mechanism 24. The locking mechanism 23 is used to simultaneously connect multiple external contacts 112 to the pressing mesh plate 211, thereby improving the positional stability of the pressing mesh plate 211 abutting the external contacts 112. The salt storage mechanism 24 is used to collect salt that passes through the pressing mesh plate 211 to reduce the salinization of the backfill soil in the foundation pit due to salt contamination.

[0053] Reference Figure 5 The locking mechanism 23 includes a series assembly 3, which is used to connect multiple external contacts 112 adjacent to each other. In this embodiment, every four external contacts 112 are connected by a set of series assemblies 3. The series assembly 3 includes a connecting plate 31 and a plurality of side connecting ties 32. The number of the side connecting ties 32 can be four. The side connecting ties 32 can be made of nylon. One end of the side connecting ties 32 in the longitudinal direction is glued to the external contact 112, and the other end of the side connecting ties 32 in the longitudinal direction is glued to the bottom wall of the connecting plate 31. In this way, one connecting plate 31 is connected to four external contacts 112 at the same time through four side connecting ties 32, and the connecting plate 31 is located at the connection point of the four external contacts 112.

[0054] Reference Figure 5In order to connect the connecting plate 31 to the pressing mesh plate 211, the locking mechanism 23 also includes a locking assembly 4, which includes a locking bolt 41 and a fastening nut 42. The connecting plate 31 abuts the side wall of the pressing mesh plate 211 facing the external contact 112. After the locking bolt 41 passes through the connecting plate 31 and the pressing mesh plate 211 in sequence, the fastening nut 42 is threaded onto the locking bolt 41 until the fastening nut 42 abuts the pressing mesh plate 211. At this point, the connecting plate 31 and the pressing mesh plate 211 are fixedly connected as a whole, so that the pressing mesh plate 211 is simultaneously connected to all the external contacts 112 it presses, which helps to ensure the convenience of installing the external contacts 112 on the side wall of the foundation pit.

[0055] Reference Figure 5 In order to reduce the phenomenon of salt passing through the gaps between adjacent external contacts 112 with the help of water vapor, the series assembly 3 also includes a contact pad 33. In this embodiment, the contact pad 33 can be a flexible and easily deformable rubber pad. The contact pad 33 is glued to the side wall of the supporting plate 31 away from the pressing mesh plate 211. When the pressing mesh plate 211 abuts against the external contacts 112, the supporting plate 31 with the contact pad 33 abuts and fits between the pressing mesh plate 211 and the external contacts 112, and the side wall of the supporting plate 31 with the contact pad 33 is located at the connection point of every four external contacts 112 to jointly block the connection gaps between the four external contacts 112. In addition, the compression deformation of the contact pad 33 reduces the connection gap between the supporting plate 31 and each external contact 112, thereby helping to reduce the phenomenon of salt escaping from the gaps between adjacent external contacts 112 with the help of water vapor.

[0056] Reference Figure 4 and Figure 6 The salt storage mechanism 24 comprises a salt storage arc plate 5 and a plurality of supporting pillars 6, wherein all the supporting pillars 6 are welded at intervals to the side plate of the pressing mesh plate 211 away from the external contact 112. The horizontal height of the center position of the salt storage arc plate 5 is higher than the horizontal height of the two ends of the salt storage arc plate 5 in the length direction, and decreases from the center position of the salt storage arc plate 5 to the two ends in the length direction. The outer circumference of the salt storage arc plate 5 is larger than the outer circumference of the pressing mesh plate 211. The salt storage arc plate 5 is welded to the end of all the supporting pillars 6 away from the pressing mesh plate 211 so as to be erected above the pressing mesh plate 211.

[0057] Reference Figure 6 The salt storage arc plate 5 has a pre-set salt storage cavity 51 within it, and multiple salt conduction channels 52 are provided through the side wall of the salt storage arc plate 5 facing the pressure mesh plate 211. When salt in the original soil of the saline-alkali land passes through the gaps between the adjacent external contacts 112 through water vapor and escapes above the pressure mesh plate 211, the salt storage arc plate 5 is used to block the salt, and the salt enters the salt storage cavity 51 through the salt conduction channels 52. Afterwards, the salt can be sequentially displaced along the curvature of the salt storage arc plate 5 and accumulated in the low-level cavities located at both ends of the length of the salt storage arc plate 5.

[0058] Reference Figure 6 In order to reduce the phenomenon that salt accumulates in the low-level cavity for a long time and is difficult to clean, the salt storage mechanism 24 also includes an external connecting pipe 7 and an internal sealing cover 8. When the salt isolation layer structure is set on the bottom wall of the foundation pit, the number of external connecting pipes 7 can be two, one external connecting pipe 7 is set at one end of the length direction of the salt storage arc plate 5 in the vertical direction, and the end of the external connecting pipe 7 close to the salt storage arc plate 5 is plugged into the low-level cavity of the salt storage arc plate 5. The end of the external connecting pipe 7 away from the salt storage arc plate 5 passes through the backfill soil of the foundation pit and is located above the backfill soil to contact with the atmosphere. At this time, the operator can use the suction pipe to suck out the salt-containing water vapor in the low-level cavity of the salt storage cavity. The internal sealing cover 8 is screwed on the end of the external connecting pipe 7 away from the salt storage arc plate 5 to reduce the phenomenon of external moisture entering the inner cavity of the salt storage cavity. It should be noted that when the salt-isolating layer structure is provided on the sidewall of the foundation pit, the two ends of the salt-storage arc plate 5 are vertically spaced, one higher and one lower. Only one external connecting pipe 7 is required. The external connecting pipe 7 passes through one end of the salt-storage arc plate 5 in the longitudinal direction to enter the salt storage cavity, then passes through and stops at the other end of the salt-storage arc plate 5 in the longitudinal direction. The end that passes through first is the end with a higher horizontal height, so that the external connecting pipe 7 is connected to the inner cavity of the salt storage cavity with a lower horizontal height.

[0059] The implementation principle of the ecological salt-isolating layer structure for saline-alkali land in the embodiment of the present application is as follows: the supporting plate 31 is connected to multiple external contacts 112 at the same time through the side connecting strap 32, so that the external contacts 112 are connected to the pressing mesh plate 211, thereby improving the convenience of installing the external contacts 112 in the foundation pit and the stability of the pressing mesh plate 211 pressing the external contacts 112 tightly in the foundation pit.

[0060] The salt-storage arc plate 5 is used to prevent salt from penetrating the pressure-relief mesh plate 211 and entering the foundation pit backfill, helping to reduce salinization of the backfill due to salt infiltration. Furthermore, salt that passes through the pressure-relief mesh plate 211 can also enter the salt storage cavity through the smoke channel and ultimately accumulate at both ends of the salt storage cavity along its length.

[0061] The external communication pipe 7 is used to connect the inner cavity of the salt storage cavity with the outside atmosphere, thereby making it easier for operators to use tools to suck the salt in the salt storage cavity.

[0062] The present application also discloses a method for preventing salt backflow in an ecological salt-isolating layer structure of saline-alkali land, and the method comprises the following steps:

[0063] Salt isolation: The external contact pieces 112 are spread in the foundation pit dug in the saline-alkali land, and multiple external contact pieces 112 are in contact with each other to form an isolation layer in the foundation pit for isolating the original soil of the saline-alkali land from the backfill soil in the foundation pit, thereby reducing the phenomenon of direct contact between the original soil of the saline-alkali land and the backfill soil of the foundation pit, reducing the phenomenon of salt in the original soil of the saline-alkali land entering the backfill soil through water vapor and salinizing the backfill soil, and reducing the frequency of backfill soil requiring treatment due to salinization.

[0064] Positioning: The external contact 112 is pressed against the mesh plate 211 to contact the inside of the foundation pit, thereby limiting the position of adjacent external contacts 112 and reducing the phenomenon of the external contact 112 being free and displaced in the foundation pit.

[0065] One end of the pre-connected screw rod 222 with a drilling cone head 224 is threaded into the positioning screw barrel 221 and inserted into the foundation pit, so that the pressure-receiving mesh plate 211 presses the external contact 112 tightly into the foundation pit, thereby limiting the position of the external contact 112 in the foundation pit and ensuring the position stability and application stability of the external contact 112 in the foundation pit.

[0066] Salt absorption: The external contact member 112 absorbs the salt that escapes from the original soil of the saline-alkali land with the help of water vapor through the water absorption property of the sponge itself. The salt that enters the external contact member 112 is absorbed by the water-absorbing particles and eventually remains in the hydrogel formed after the water-absorbing particles absorb water and is difficult to precipitate outward, thereby effectively reducing the phenomenon of salt entering the backfill soil and salinizing the backfill soil.

[0067] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. The ecological salt barrier structure of saline-alkali land is characterized by: The invention comprises an absorption device (1) and a limiting device (2); the absorption device (1) comprises a plurality of salt absorbing mechanisms (11), all of which are arranged in a foundation pit of saline-alkali land, and adjacent salt absorbing mechanisms (11) are abutted against each other to prevent salt in the saline-alkali land from entering the foundation pit; the limiting device (2) comprises an abutting mechanism (21) and a retaining mechanism (22), the abutting mechanism (21) is used to abut all of the salt absorbing mechanisms (11) against the foundation pit, and the retaining mechanism (22) is used to abut all of the salt absorbing mechanisms (11) against the foundation pit. 22) is used to position the abutment mechanism (21) in the foundation pit to limit the position of the salt absorbing mechanism (11) in the foundation pit; each group of the salt absorbing mechanism (11) includes a deformation core (111), an external contact (112) and a plurality of absorption particles (113); the deformation core (111) is arranged inside the abutment outer ball, and a pre-set cavity (1121) for installing all the absorption particles (113) is arranged inside the external contact (112) and around the outer periphery of the deformation core (111).

2. The ecological salt barrier structure for saline-alkali land according to claim 1, characterized in that: The abutting mechanism (21) comprises a pressing mesh plate (211), and the pressing mesh plate (211) is used to abut multiple external contacts (112) at the same time; the retaining mechanism (22) comprises a counter screw (221), a pre-connecting screw rod (222), an end hand ring (223) and a drilling cone head (224); the counter screw (221) is arranged on the pressing mesh plate (211), and the end hand ring (223) and the drilling cone head (224) are respectively arranged at both ends of the pre-connecting screw rod (222) in the length direction; one end of the pre-connecting screw rod (222) with the drilling cone head (224) is threadedly passed through the counter screw (221) and inserted into the foundation pit, so that the pressing mesh plate (211) presses the external contacts (112) tightly into the foundation pit.

3. The ecological salt-isolating layer structure for saline-alkali land according to claim 2, characterized in that: The limiting device (2) further comprises a locking mechanism (23) for connecting the pressing mesh plate (211) to a plurality of external contacts (112) at the same time, and the locking mechanism (23) further comprises a series assembly (3) and a locking assembly (4); the series assembly (3) is used to connect a plurality of external contacts (112) at the same time, and the locking assembly (4) is used to connect the series assembly (3) to the pressing mesh plate (211).

4. The ecological salt barrier structure for saline-alkali land according to claim 3, characterized in that: The series assembly (3) includes a supporting plate (31) and a plurality of side connection straps (32), one end of each side connection strap (32) is connected to the supporting plate (31), and the other end of each side connection strap (32) is correspondingly connected to an external contact (112); the locking assembly (4) includes a locking bolt (41) and a tightening nut (42), the locking bolt (41) is simultaneously passed through the supporting plate (31) and the pressing mesh plate (211), and tightens the supporting plate (31) to the pressing mesh plate (211); the tightening nut (42) is threadedly connected to the locking bolt (41), so that the supporting plate (31) is connected to the pressing mesh plate (211).

5. The ecological salt-isolating layer structure for saline-alkali land according to claim 4, characterized in that: The series assembly (3) further comprises a contact pad (33), which is arranged on a side wall of the connecting plate (31) away from the pressing mesh plate (211), and the contact pad (33) is abutted and fitted between the connecting plate (31) and the external contact (112).

6. The ecological salt-isolating layer structure for saline-alkali land according to claim 5, characterized in that: The limiting device (2) further comprises a salt storage mechanism (24), the salt storage mechanism (24) comprising a salt storage arc plate (5) and a plurality of receiving pillars (6); all the receiving pillars (6) are arranged at intervals on the side wall of the pressing mesh plate (211) away from the external contact (112), and the salt storage arc plate (5) is arranged at one end of all the receiving pillars (6) away from the pressing mesh plate (211); a salt storage cavity (51) is arranged inside the salt storage arc plate (5), and a salt guide channel (52) communicating with the salt storage cavity (51) is also arranged through the side wall of the salt storage arc plate (5) facing the pressing mesh plate (211).

7. The ecological salt barrier structure for saline-alkali land according to claim 6, characterized in that: The salt storage mechanism (24) further comprises an external communicating tube (7) and an internal sealing cover (8), wherein one end of the external communicating tube (7) is passed through the salt storage cavity (51), and the internal sealing cover (8) is arranged at the other end of the external communicating tube (7) to seal the end of the external communicating tube (7) away from the salt storage cavity (51), or to enable the salt storage cavity (51) to communicate with the atmosphere through the external communicating tube (7).

8. The method for preventing salt backflow in an ecological salt-isolating layer structure of saline-alkali land according to claim 7, wherein: The anti-back salt method comprises the following treatment steps: Salt isolation: The salt absorption mechanism (11) is spread in the foundation pit excavated in the saline-alkali land to prevent the original soil of the saline-alkali land from directly contacting the backfill soil in the foundation pit, thereby reducing the salt in the original soil of the saline-alkali land from entering the backfill soil through water vapor surge; Positioning: The salt absorbing mechanism (11) is abutted against the foundation pit by the abutting mechanism (21), and then the abutting mechanism (21) is positioned on the foundation pit by the retaining mechanism (22), so as to limit the position of the salt absorbing mechanism (11) in the foundation pit and ensure the position stability and application stability of the salt absorbing mechanism (11) in the foundation pit; Salt absorption: The salt in the original soil of the saline-alkali land is absorbed by the salt absorption mechanism (11), thereby reducing the phenomenon of salt escaping into the foundation pit and salinizing the backfill soil.

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