Expanded salix mongolica sand barrier

Abstract

The invention discloses an unfolded salix mongolica sand barrier which comprises a plurality of salix mongolica battens, and each salix mongolica batten comprises a plurality of salix mongolica branches which are arranged in a mutually crossed and / or parallel mode. And each supporting column is arranged between the multiple adjacent salix psammophila battens. According to the unfolded salix psammophila sand barrier, salix psammophila battens are woven into the salix psammophila battens in advance, the salix psammophila battens can be rapidly unfolded in the laying process, the sand barrier with a plurality of complete cells is formed, only fixing piles need to be arranged on the edges for fixing, the tedious operation of ditching, burying or hammering and nailing the salix psammophila battens in existing salix psammophila sand barrier construction is not needed, the construction efficiency can be improved, and the construction cost is reduced. The construction time and human input are greatly reduced, the problems that an existing sand barrier is long in construction period and high in labor cost are effectively solved, the sand barrier laying work of a larger area can be completed within a shorter time, and powerful guarantee is provided for rapidly responding to the sand prevention and control requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of wind and sand prevention, and in particular to an expandable Salix psammophila sand barrier. Background Art

[0002] Mechanical sand barriers are an effective means widely used in sand control and fixation projects. However, existing mechanical sand barriers generally face many challenges in practical applications, such as material selection, construction efficiency, cost control, and environmental friendliness.

[0003] Direct-insertion sand barriers made of Salix psammophila have attracted attention due to their inherently green and pollution-free nature. However, their construction often requires manual trenching or hammering branches into the sand, a cumbersome and inefficient process. Traditionally, the lower portion of the Salix psammophila branches must be buried 30-40 centimeters into the sand, with the upper portion exposed 20-30 centimeters. This construction method is not only time-consuming and labor-intensive, but also easily results in material (branch) waste, leading to high construction costs. Furthermore, the applicability of this type of sand barrier is severely limited: it can only be effectively deployed in areas with loose topsoil, such as shifting sand dunes, but is difficult to implement on hard surfaces such as Gobi deserts and sedimentary flats, greatly limiting its scope of application.

[0004] On the other hand, although there are some forms of sand barriers that are relatively easy to construct, the materials themselves may not be environmentally friendly or even cause pollution problems, which does not meet the current green development requirements of ecological governance.

[0005] More critically, existing straight-insertion Salix psammophila sand barriers have inherent structural flaws. Because the branches are individually inserted into the sand, they lack effective connections, resulting in insufficient overall structural strength. When subjected to strong wind erosion, the branches easily fall and scatter from the sand, losing their ability to prevent and stabilize sand. Furthermore, once buried in the sand, it's difficult to effectively lift the scattered branches out of the sand and restore their function, resulting in a low reuse rate.

[0006] Therefore, the current field of sand prevention and control urgently needs to develop a new type of sand barrier, which should have the following core characteristics: a wide range of material sources, low cost, and green and pollution-free; it can be efficiently processed and quickly deployed through mechanization, significantly saving manpower, shortening construction period, and reducing costs; it has good structural stability and can adapt to a variety of complex terrains including hard soil surfaces; it can be easily restored or reused after encountering wind erosion or sand burial. Solving the above problems and developing sand barrier technology that meets these requirements has become an urgent need in sand prevention and control projects. Summary of the Invention

[0007] The main purpose of the present invention is to provide an expandable Salix psammophila sand barrier to overcome the shortcomings of the prior art.

[0008] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions.

[0009] Some embodiments of the present invention provide an expandable Salix psammophila sand barrier, comprising a plurality of Salix psammophila slats, wherein the Salix psammophila slats comprise a plurality of Salix psammophila branches arranged crosswise and / or in parallel with each other;

[0010] A plurality of pillars, each pillar being arranged between a plurality of adjacent sand willow slats;

[0011] Multiple groups of limiting collars, each group of limiting collars includes multiple limiting collars equidistantly sleeved on a pillar along the axial direction, the outer wall and inner wall of the limiting collar are respectively provided with a connecting chute and an annular inner groove extending in the circumferential direction, the connecting chute and the annular inner groove are connected to each other, and the projection of the annular inner groove on the outer wall of the corresponding pillar completely covers the projection of the connecting chute on the outer wall of the corresponding pillar, the upper end of the annular inner groove is higher than the upper end of the connecting chute, and the lower end is lower than the lower end of the connecting chute;

[0012] Multiple groups of limiting mechanisms, each group of limiting mechanisms includes multiple limiting mechanisms fixed on one end of a corresponding sand willow slat, multiple limiting mechanisms are arranged at equal intervals in a direction parallel to the pillar, each limiting mechanism includes a first limiting block and a second limiting block, the first limiting block is fixedly connected to the corresponding sand willow slat, the second limiting block is movably embedded in the corresponding annular inner groove and can slide at least along the circumferential direction, and a part of the first limiting block also passes through the corresponding connecting slide groove and is fixedly connected to the second limiting block;

[0013] Wherein, each of the limiting rings cooperates with a plurality of limiting mechanisms, so that one of the pillars is movably connected to a plurality of tamarisk slats.

[0014] In one embodiment, the limiting collar is symmetrically provided with multiple groups of T-shaped grooves, each group of T-shaped grooves includes two T-shaped grooves symmetrically arranged at the top and bottom of the limiting collar, and the T-shaped grooves, the annular inner groove and the connecting groove are connected to each other.

[0015] In one embodiment, it further includes a plurality of side baffles, each of which is fixed on one end of a corresponding wicker board, and the first limiting block is fixedly mounted on the side baffle.

[0016] In one embodiment, a placement chassis is fixedly mounted on the bottom end of the support, a first limiting stop ring is provided at the top edge of the placement chassis, and the bottom end of the side baffle is located on the inner side of the first limiting stop ring.

[0017] In one embodiment, a fixing pile is further included, wherein the top of the fixing pile is fixedly connected to the bottom end of the pillar via a limiting circular plate.

[0018] In one embodiment, a fixing bolt column is fixedly connected to the top of the limiting circular plate, and a threaded slot is provided at the bottom end of the column. The diameter of the threaded slot is smaller than the diameter of the placement chassis. A limiting through hole is provided on the placement chassis, and the limiting through hole penetrates the placement chassis axially. The fixing bolt column passes through the limiting through hole and is connected to the threaded slot, and at the same time, the limiting circular plate is partially or completely embedded in the limiting through hole.

[0019] In one embodiment, the top end of the pillar is connected to the limiting top plate via a threaded connection mechanism, and the threaded connection mechanism includes a limiting bolt column fixedly installed on the top end of the pillar and a first threaded hole axially penetrating the limiting top plate, and the limiting bolt column and the first threaded hole cooperate with each other.

[0020] In one embodiment, a second limiting stop ring is further provided at the bottom edge of the limiting top plate, and the top end of the side baffle is located on the inner side of the second limiting stop ring.

[0021] In one embodiment, a plurality of the tamarisk slats and a plurality of the pillars are movably connected, so that the expandable tamarisk sand barrier presents a honeycomb cell structure when expanded and presents a plate-like structure when folded.

[0022] The porosity of the sand willow slats is 55-65%; and / or the sand willow slats are formed by weaving the weft threads and the sand willow branches as the warp threads.

[0023] Compared with the prior art, the present invention has at least the following beneficial effects:

[0024] 1. The present invention pre-weaves willow branches into willow strips, which can be quickly unfolded when laid out to form a sand barrier with 23 complete cells. It only needs to set fixed stakes at the edge for fixation. There is no need for the tedious trenching and burying or hammering in willow branches in the construction of traditional willow sand barriers. It can improve construction efficiency, greatly reduce construction time and manpower investment, and effectively solve the problems of long construction period and high labor cost of traditional sand barriers. It enables the laying of sand barriers over a larger area to be completed in a shorter time, providing a strong guarantee for rapid response to sand prevention and control needs. At the same time, the sand barrier can be folded during transportation, and the volume is greatly reduced, which is convenient for transportation and storage. It not only saves transportation costs and space, but also reduces losses during transportation and dependence on transportation tools, further enhancing the operability and practicality of the sand barrier.

[0025] 2. The overall sand barrier formed by closely splicing multiple components of tamarisk slats in the present invention has better structural stability. The 23 interconnected complete cells and 12 incomplete cells together constitute a stable system that supports and restrains each other. Compared with traditional tamarisk branches that are inserted into the sand alone, when encountering external forces such as strong wind and sand erosion and water erosion, it can effectively disperse and resist the damage of external forces, greatly reducing the risk of the overall collapse and scattering of the sand barrier, ensuring that the sand barrier can remain stable for a long time in complex and harsh natural environments, maintaining its function of preventing and fixing sand, extending the service life of the sand barrier, and reducing the frequency and cost of maintenance and replacement.

[0026] 3. The present invention allows the sand barrier to be spliced ​​into a larger sand barrier through the arrangement of quick splicing between the sand willow slats and the pillars. This flexible splicing method enables the sand barrier to be customized according to the size and shape of the actual site, meeting the sand prevention and fixation needs of different scales and regions. Whether it is a small area of ​​desertified land management or a large area of ​​sand hazard prevention and control project, it can be flexibly applied to achieve seamless connection and overall coverage of the sand barrier, thereby improving the overall protective effect of the sand barrier.

[0027] 4. When a certain part of the sand barrier of the present invention is locally damaged due to accidental damage or long-term use, there is no need to carry out large-scale repair or replacement of the entire sand barrier. Only the damaged part needs to be replaced separately, which greatly reduces the maintenance cost and repair difficulty, improves the maintainability and economy of the sand barrier, ensures the stability and reliability of the sand barrier during use, and avoids affecting the overall sand prevention and fixation effect due to local damage.

[0028] 5. The present invention uses Salix psammophila branches as raw materials, and the Salix psammophila strips are formed by machine cutting and weaving, which realizes the efficient utilization of Salix psammophila branches, avoids the material waste caused by direct insertion into sand in the construction of traditional Salix psammophila sand barriers, improves the utilization rate of Salix psammophila resources, reduces production costs, and also protects the sustainability of Salix psammophila resources, and has a positive promoting effect on the ecological environment. At the same time, Salix psammophila is a plant with excellent characteristics such as windbreak, sand fixation, drought resistance and cold resistance. After the sand barrier is laid, its branches can continue to play an ecological function, provide a good habitat for the growth of sand plants, and are conducive to the restoration of vegetation and the improvement of the ecological environment, further enhancing the ecological benefits of the sand barrier, and forming an eco-friendly sand prevention and fixation solution.

[0029] 6. The fixing method of the present invention mainly relies on the fixing piles on the edge, unlike the traditional tamarisk sand barrier which requires the tamarisk branches to be directly inserted into the sand. Therefore, the tamarisk sand barrier of the present application has stronger adaptability to the surface soil. It can not only be used in places with loose surface soil such as mobile sand dunes, but also in surface environments with hard soil such as Gobi and sedimentary beaches. It breaks the application bottleneck of traditional tamarisk sand barriers restricted by soil quality, expands the scope of application of tamarisk sand barriers, and provides a wider range of options for sand damage prevention and control in different regions and different surface types, and has important promotion and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the overall structure of an expandable Salix psammophila sand barrier in one embodiment of the present invention;

[0031] Figure 2 This is a bottom-up perspective structural diagram of an expandable Salix psammophila sand barrier according to one embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of the three-dimensional structure of the tamarisk slats and pillars of an expandable tamarisk sand barrier in one embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of a partially unfolded three-dimensional structure of an unfolded Salix psammophila sand barrier in one embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the three-dimensional structure of a limiting collar in one embodiment of the present invention;

[0035] Figure 6 This is a schematic diagram of the three-dimensional structure of a willow slat board according to one embodiment of the present invention;

[0036] Figure 7 The figure is a schematic diagram of the three-dimensional structure of a fixing pile in one embodiment of the present invention.

[0037] Description of reference numerals:

[0038] 1. Salix slats; 2. Pillars; 3. Chassis placement; 4. First limit ring; 5. Limit bolt column; 6. Limit top plate; 7. First threaded hole; 8. Side baffle; 9. First limit block; 10. Second limit block; 11. Limit collar; 12. T-shaped slide; 13. Annular inner groove; 14. Connecting slide; Threaded slot 15. Threaded slot; 16. Limit through hole; 17. Fixing pile; 18. Limit circular plate; 19. Fixing bolt column; 20. Second limit ring. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0040] Reference Figure 1-Figure 7 This embodiment provides an expandable Salix psammophila sand barrier, which includes:

[0041] A plurality of willow slats 1, each of which comprises a plurality of willow branches arranged crosswise and / or in parallel;

[0042] A plurality of pillars 2, each pillar 2 is arranged between a plurality of adjacent tamarisk slats 1, and the plurality of tamarisk slats 1 and the plurality of pillars 2 are movably connected, so that the expandable tamarisk sand barrier presents a honeycomb cell structure when expanded and presents a plate-like structure when folded;

[0043] Multiple groups of limiting collars 11, each group of limiting collars 11 includes multiple limiting collars 11 equidistantly arranged on one pillar 2 along the axial direction, and a connecting chute 14 and an annular inner groove 13 extending in the circumferential direction are respectively formed on the outer wall and the inner wall of the limiting collar 11. The connecting chute 14 and the annular inner groove 13 are connected to each other, and the projection of the annular inner groove 13 on the outer wall of the corresponding pillar 2 completely covers the projection of the connecting chute 14 on the outer wall of the corresponding pillar 2. The upper end of the annular inner groove 13 is higher than the upper end of the connecting chute 14, and the lower end is lower than the lower end of the connecting chute 14;

[0044] Multiple groups of limiting mechanisms, each group of limiting mechanisms includes multiple limiting mechanisms fixed on one end of a corresponding sand willow slat board 1, and the multiple limiting mechanisms are arranged at equal intervals in a direction parallel to the pillar 2. Each limiting mechanism includes a first limiting block 9 and a second limiting block 10. The first limiting block 9 is fixedly connected to the corresponding sand willow slat board 1, and the second limiting block 10 is movably embedded in the corresponding annular inner groove 13 and can slide at least circumferentially, and a part of the first limiting block 9 also passes through the corresponding connecting groove 14 and is fixedly connected to the second limiting block 10;

[0045] Among them, each limiting ring 11 cooperates with multiple limiting mechanisms, so that a pillar 2 is movably connected to multiple willow slats 1.

[0046] Furthermore, multiple groups of T-shaped grooves 12 are symmetrically provided on the limiting collar 11, and each group of T-shaped grooves 12 includes two T-shaped grooves 12 symmetrically provided at the top and bottom of the limiting collar 11, and the T-shaped grooves 12, the annular inner groove 13 and the connecting groove 14 are interconnected.

[0047] Furthermore, the expandable tamarisk sand barrier can also include multiple side baffles 8, each side baffle 8 is fixed on one end of a corresponding tamarisk slat board 1, and the first limit block 9 is fixedly installed on the side baffle 8.

[0048] The limiting collar of the present application is an open structure as a whole, and particles such as sand and dust are not easily retained inside the limiting collar. When in use, there is no need to perform additional operations such as cleaning the accumulated sand inside, and the quick connection or separation of the willow slats and the pillars can be easily achieved through simple operations.

[0049] Furthermore, a placement chassis 3 is fixedly installed at the bottom end of the pillar 2, and a first limit ring 4 is provided at the top edge of the placement chassis 3. The bottom end of the side baffle 8 is located on the inner side of the first limit ring 4. The setting of the placement chassis 3 facilitates the limiting and load-bearing setting of the side baffle 8.

[0050] Furthermore, the expandable tamarisk sand barrier can also have a fixed pile 17, and the top of the fixed pile 17 is fixedly connected to the bottom end of the pillar 2 through a limiting circular plate 18.

[0051] Furthermore, a fixing bolt column 19 is fixedly connected to the top of the limiting circular plate 18, and a threaded slot 15 is provided at the bottom end of the pillar 2. The diameter of the threaded slot 15 is smaller than the diameter of the placement chassis 3. A limiting through hole 16 is provided on the placement chassis 3, and the limiting through hole 16 penetrates the placement chassis 3 axially; the fixing bolt column 19 passes through the limiting through hole 16 and is connected to the threaded slot 15, and at the same time, the limiting circular plate 18 is partially or completely embedded in the limiting through hole 16.

[0052] Furthermore, the top end of the support column 2 is connected to the limiting top plate 6 via a threaded connection mechanism. The threaded connection mechanism includes a limiting bolt column 5 fixedly mounted on the top of the support column 2 and a first threaded hole 7 axially extending through the limiting top plate 6. The limiting bolt column 5 and the first threaded hole 7 cooperate with each other. In some cases, the first threaded hole 7 is preferably a blind hole formed on the lower end surface of the limiting top plate 6. In this way, the limiting top plate 6 can be used to block the threaded connection mechanism, preventing fine sand and dust from invading the aforementioned threaded connection mechanism.

[0053] Furthermore, a second limiting retaining ring 20 is provided at the bottom edge of the limiting top plate 6 , and the top end of the side baffle 8 is located on the inner side of the second limiting retaining ring 20 .

[0054] Furthermore, fixing piles 17 are provided below the pillars 2 at the intersection of the two groups of sand willow slats 1, and there are twelve groups of fixing piles 17 in total. It is only necessary to arrange the fixing piles 17 at the intersection of the two groups of sand willow slats 1, and no arrangement is required at the intersections of the other four groups of sand willow slats 1. In this way, when the multiple groups of sand willow slats 1 are unfolded into 23 complete cells, it is only necessary to fix twelve groups of fixing piles 17 at the positions around the edges. There is no need to perform tedious operations such as trenching and burying or hammering in like traditional sand willow sand barriers, which improves construction efficiency and reduces The construction time and manpower investment are reduced. The top of the fixed pile 17 is fixedly connected to the limiting circular plate 18, and the radius of the limiting circular plate 18 is slightly smaller than the radius of the limiting through hole 16. The top of the limiting circular plate 18 is fixedly connected to the fixing bolt column 19, and the fixing bolt column 19 is threadedly connected to the threaded groove 15 at the bottom of the pillar 2 at the intersection of the two groups of tamarisk slats 1. Through the threaded connection between the fixing bolt column 19 and the threaded groove 15, the fixed pile 17 is convenient for disassembly and assembly from the bottom of the pillar 2, which is convenient for installation according to actual needs.

[0055] In some cases, multiple groups of sand willow slats 1 can be set up with a width of 4.2m and a length of 7.1m when unfolded, with 23 complete cells and 12 incomplete cells, and a specification of 1×1m, covering an area of ​​30 square meters.

[0056] In some cases, the willow slats 1 can be formed by weaving willow branches as warp and weft threads. For example, the willow branches are 20 cm long and 1-1.5 cm in diameter. The warp threads are made of ageing-resistant, UV-resistant high-density polyethylene (HDPE) with a diameter of 2-3 mm. Three warp threads are designed, positioned at approximately 3 cm, 10 cm, and 17 cm. The willow branches serve as weft threads, and the warp and weft threads are interwoven to form the willow slats 1. The porosity is 55-65%, and the willow branches have a density of 40-50 threads / m.

[0057] During use, the first limit blocks 9 and the second limit blocks 10 on the multiple groups of tamarisk slats 1 are set to slide in the connecting slide grooves 14 and the annular inner grooves 13 on the surface of the limit ring 11 of the pillar 2, so that when the sand barrier needs to be used, it is only necessary to unfold the multiple groups of tamarisk slats 1 to form a grid shape, with a total of 23 complete cells and 12 incomplete cells on the edge. Then, the fixing bolt column 19 is screwed into the threaded groove 15 at the bottom of the pillar 2 at the intersection of the two groups of tamarisk slats 1, and then the fixing pile 17 is fixed to the bottom of the pillar 2 at the intersection of the two groups of tamarisk slats 1. Subsequently, the group of 23 complete cells of the sand barrier is fixedly installed on the sand at the designated position through the fixing pile 17.

[0058] When the tamarisk slats 1 and multiple groups of pillars 2 are being assembled, the three groups of first limit blocks 9 and second limit blocks 10 on the side baffle 8 at one end of the tamarisk slats 1 are sequentially passed through a group of T-shaped slides 12 on the three groups of limit rings 11 on the pillars 2, so that the bottom of the side baffle 8 contacts the top of the placement chassis 3, and then the tamarisk slats 1 to be installed are respectively installed on the surface of the pillars 2 as required. After that, the first threaded hole 7 on the limit top plate 6 and the limit bolt column 5 on the top of the pillar 2 can be aligned and screwed to make the limit top plate 6 move down on the surface of the limit bolt column 5, completing the limiting operation on the top of the side baffle 8, and then the operations can be performed in sequence to complete the assembly operation of the sand barrier.

[0059] At the same time, when one of the tamarisk slats 1 is damaged after the sand barrier has been used for a long time, the limiting top plate 6 on the pillars 2 on both sides of the corresponding tamarisk slat 1 can be screwed to cancel the fixing of the limiting top plate 6 to the upper baffle 8 of the tamarisk slat 1, and then the tamarisk slat 1 can be taken out and replaced with a new tamarisk slat 1, and then the limiting top plate 6 can be screwed and fixed. The operation is simple.

[0060] This embodiment weaves tamarisk branches into tamarisk strips, which can be folded up during transportation, greatly reducing the volume, making transportation convenient and saving transportation costs and space. It can be quickly unfolded during deployment and only requires fixed stakes at the edges. There is no need for tedious operations such as trenching and burying or hammering in like traditional tamarisk sand barriers. This improves construction efficiency, reduces construction time and manpower investment, and effectively solves the problems of slow construction and high costs of traditional sand barriers.

[0061] In addition, the pillars, limiting rings, limiting mechanisms, etc. in this embodiment can all be made of wear-resistant and corrosion-resistant metal components, which can be used repeatedly for a long time in conjunction with different willow slats, thereby effectively saving usage costs.

[0062] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An expandable Salix psammophila sand barrier, characterized in that: include: A plurality of willow slats (1), wherein the willow slats (1) comprise a plurality of willow branches that are mutually crossed and / or arranged in parallel; A plurality of pillars (2), each pillar (2) being arranged between a plurality of adjacent sand willow slats (1); Multiple groups of limiting collars (11), each group of limiting collars (11) includes multiple limiting collars (11) equidistantly sleeved on a pillar (2) along the axial direction, and the outer wall and inner wall of the limiting collar (11) are respectively provided with a connecting groove (14) and an annular inner groove (13) extending along the circumferential direction, the connecting groove (14) and the annular inner groove (13) are connected to each other, and the projection of the annular inner groove (13) on the outer wall of the corresponding pillar (2) completely covers the projection of the connecting groove (14) on the outer wall of the corresponding pillar (2), and the upper end of the annular inner groove (13) is higher than the upper end of the connecting groove (14), and the lower end is lower than the lower end of the connecting groove (14); Multiple groups of limiting mechanisms, each group of limiting mechanisms includes multiple limiting mechanisms fixed on one end of a corresponding sand willow slat (1), multiple limiting mechanisms are arranged at equal intervals in a direction parallel to the pillar (2), each limiting mechanism includes a first limiting block (9) and a second limiting block (10), the first limiting block (9) is fixedly connected to the corresponding sand willow slat (1), the second limiting block (10) is movably embedded in a corresponding annular inner groove (13) and can slide at least circumferentially, and a part of the first limiting block (9) also passes through a corresponding connecting groove (14) and is fixedly connected to the second limiting block (10); Each of the limiting collars (11) cooperates with a plurality of limiting mechanisms, thereby enabling one of the pillars (2) to be movably connected to a plurality of sand willow slats (1).

2. The expandable Salix psammophila sand barrier according to claim 1, characterized in that: The limiting collar (11) is symmetrically provided with a plurality of groups of T-shaped grooves (12), each group of T-shaped grooves (12) comprising two T-shaped grooves (12) symmetrically arranged at the top and bottom of the limiting collar (11), and the T-shaped grooves (12), the annular inner groove (13) and the connecting groove (14) are connected to each other.

3. The expandable Salix psammophila sand barrier according to claim 1, characterized in that: It also includes a plurality of side baffles (8), each of the side baffles (8) is fixed on one end of a corresponding sand willow board (1), and the first limiting block (9) is fixedly mounted on the side baffle (8).

4. The expandable Salix psammophila sand barrier according to claim 1, characterized in that: A placement chassis (3) is fixedly mounted on the bottom end of the support (2), a first position-limiting retaining ring (4) is provided at the top edge of the placement chassis (3), and the bottom end of the side baffle (8) is located inside the first position-limiting retaining ring (4).

5. The expandable Salix psammophila sand barrier according to claim 3, characterized in that: It also includes a fixed pile (17), the top of which is fixedly connected to the bottom end of the pillar (2) via a limiting circular plate (18).

6. The expandable Salix psammophila sand barrier according to claim 5, characterized in that: The top of the limiting circular plate (18) is fixedly connected with a fixing bolt column (19), and the bottom end of the pillar (2) is provided with a threaded notch (15), the diameter of the threaded notch (15) is smaller than the diameter of the placement chassis (3), and the placement chassis (3) is provided with a limiting through hole (16), and the limiting through hole (16) penetrates the placement chassis (3) along the axial direction; the fixing bolt column (19) passes through the limiting through hole (16) and is connected to the threaded notch (15), and at the same time, the limiting circular plate (18) is partially or entirely embedded in the limiting through hole (16).

7. The expandable Salix psammophila sand barrier according to claim 6, characterized in that: The top end of the pillar (2) is connected to the limiting top plate (6) via a threaded connection mechanism, wherein the threaded connection mechanism comprises a limiting bolt column (5) fixedly mounted on the top end of the pillar (2) and a first threaded hole (7) axially penetrating the limiting top plate (6), wherein the limiting bolt column (5) and the first threaded hole (7) cooperate with each other.

8. The expandable Salix psammophila sand barrier according to claim 1, characterized in that: A second limiting retaining ring (20) is also provided at the bottom edge of the limiting top plate (6), and the top end of the side baffle (8) is located inside the second limiting retaining ring (20).

9. The expandable Salix psammophila sand barrier according to claim 1, characterized in that: The plurality of tamarisk slats (1) and the plurality of pillars (2) are movably connected, so that the expandable tamarisk sand barrier presents a honeycomb cell structure when expanded and presents a plate-like structure when folded.

10. The expandable Salix psammophila sand barrier according to claim 9, characterized in that: The porosity of the sand willow slats (1) is 55-65%; and / or, the sand willow slats (1) are woven from weft threads and sand willow branches as warp threads.

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