A lattice beam ecological slope protection reinforcing structure and method based on root system planting

Abstract

The application discloses a lattice beam ecological slope protection reinforcing structure and method based on root planting, relates to the technical field of soil and water conservation, and comprises a lattice beam, a planting pot, a supply device and a planting pipe. Through holes are formed in the lattice beam. The planting pot is in communication with the front end of at least one planting pipe, the planting pipe passes through at least one through hole, and the planting pipe is filled with solid substrate. The end of the planting pipe is in communication with the supply device, and the supply device supplies liquid nutrient containing water and nutrients to the planting pipe. The application supplies nutrients to the planting pot with plants through the planting pipe, utilizes the tropism of plant roots, induces directional growth of the plants, and enables the plant roots to repeatedly wind around the lattice beam and be integrated with the lattice beam, so that the combination of the lattice beam, the soil and the plant roots can be effectively improved, the problem of local soil and water loss in the lattice beam under extreme conditions can be solved, and the soil and water conservation performance of the slope protection reinforcing structure and the ecological slope protection effect can be ensured.

Description

Technical Field

[0001] This invention relates to the field of soil and water conservation technology, specifically to a slope support structure and method that combines lattice beams with vegetation. Background Technology

[0002] Grid beams are the most commonly used and effective reinforcement mechanism in anchoring construction, especially in the reinforcement of steep slopes in mountainous areas. The slope support types using grid beams mainly include pure grid beam support, combined support of anchor cables and grid beams, combined support of anchor bolts and grid beams, combined support of grid beams and shotcrete, and combined support of grid beams and vegetation. Among these, the combination of grid beams and vegetation is considered a more ideal ecological support method.

[0003] Based on existing technology searches, the following known technical solutions exist: Prior Art 1: An Ecological Protection Structure for Steep Slopes with Fractured Rocks and Its Construction Method Application number: CN202010491229.5, application date: June 2, 2020, publication (announcement) date: August 28, 2020.

[0004] Prior art 1 relates to the field of slope protection structure technology, specifically to an ecological protection structure for steep slopes with fractured rock and its construction method. An ecological protection structure for steep slopes with fractured rock includes, from top to bottom, a seed soil layer, a wire mesh layer, a nutrient soil base layer, and a concrete grid beam, wherein planting bags are stacked within the grid of the concrete grid beam below the nutrient soil base layer; the lower part of the grid beam is buried within the slope surface, and the lower part of the grid beam is provided with an abutment wall. This invention can effectively prevent landslides while ensuring normal plant growth, thus providing excellent slope protection.

[0005] Existing Technology 2: Construction Method of Prefabricated Thin-Walled Formwork Grid Beam Ecological Slope Protection Application number: CN201910344071.6, application date: 2019.04.26, publication (announcement) date: 2019.07.05.

[0006] Existing technology 2 relates to a construction method for a prefabricated assembled thin-walled formwork grid beam ecological slope protection. The main construction steps include: installing anchor bolts, installing cross-shaped formwork boxes, installing the first prefabricated thin-walled formwork box to form a grid beam frame, pouring grid beam concrete, and stacking planting bags. In this invention, after burying drainage pipes, the slope surface is cleaned and anchor bolts are installed, with prefabricated cross-shaped formwork boxes fixed above the anchor bolts. Then, according to the position of the cross-shaped formwork boxes, prefabricated thin-walled formwork boxes are installed layer by layer from bottom to top, with adjacent prefabricated thin-walled formwork boxes interlocking through protrusions. Concrete is poured inward from each layer of cross-shaped formwork boxes, and this process is repeated until the grid beam construction is completed. Finally, planting bags are stacked in the grid beam frame, and greenery is planted in the planting troughs. This invention is convenient to construct, structurally stable, and has a high green coverage rate, solving the problems of large workload in steel reinforcement binding and formwork erection, easy beam collapse, and poor ecological performance inherent in traditional cast-in-place grid beams.

[0007] However, in both existing technologies 1 and 2, the combination of lattice beams and plants relies solely on the natural growth of plant roots. Furthermore, the surface of the lattice beams is smooth and has weak bonding with the soil, preventing the lattice beams from forming a cohesive whole with the soil and plant system. Under extreme conditions such as heavy rainfall, this can easily lead to localized soil and water loss within the lattice beams, thereby affecting the soil and water conservation performance and ecological slope protection effect of the combination of lattice beams and plants.

[0008] The above search results show that the above technical solutions do not affect the novelty of the present invention; and the combination of the above prior art does not destroy the inventiveness of the present invention. Summary of the Invention

[0009] To avoid the shortcomings of the prior art, the present invention provides a grid beam ecological slope protection reinforcement structure and method based on root planting.

[0010] The present invention adopts the following technical solution to solve the technical problem: a grid beam ecological slope protection reinforcement structure based on root planting, including grid beams and planting pots for planting vegetation, and also including a supply device and planting pipes; The lattice beam has through-hole channels. The planting pot is connected to the front end of at least one of the planting tubes, which are disposed through at least one of the pore channels and are filled with solid substrate. The end of the planting tube is connected to the supply device, which delivers liquid nutrients containing water and nutrients into the planting tube.

[0011] Furthermore, the concentration of water and nutrients in the planting tube increases from the front end to the rear end of the planting tube.

[0012] Furthermore, the solid substrate filled in the planting tube is premixed with solid nutrients, and the mass ratio of solid nutrients to solid substrate increases from the front end to the rear end of the planting tube.

[0013] Furthermore, the planting tubes are interspersed among the various pore channels opened on the lattice beam, and are repeatedly wrapped around the lattice beam.

[0014] Furthermore, the planting tube is made of a biodegradable material.

[0015] Furthermore, the nutrient supply device includes a variable frequency pump, a nutrient silo, a controller, and a monitoring probe; The monitoring probe is located inside the front end of the planting tube and is used to monitor the moisture content and electrical conductivity. The controller is connected to the monitoring probe and the variable frequency pump, and the inlet and outlet of the variable frequency pump are connected to the nutrient bin and the end of the planting tube, respectively.

[0016] A root-planting-based lattice beam ecological slope protection reinforcement method, using the aforementioned root-planting-based lattice beam ecological slope protection reinforcement structure for slope support, includes the following processes: The first step is to select the plant species to be planted. If the suitable water and nutrient thresholds for the growth of this plant species in the pot can be determined based on existing planting experiments, the upper and lower limits of the water threshold are represented by the water content as W. max and W min The upper and lower limits of the nutrient threshold are represented by conductivity as σ. max and σ min Then proceed to the second step; Otherwise, the suitable water and nutrient thresholds for this type of plant to grow in pots cannot be determined based on existing planting experiments, leading to W max =W0×90%, W min =W0×45%, σ max =4 ms / cm, σ min =0.4 ms / cm; Wherein, W0 is the field water holding capacity suitable for the growth of this type of plant; The second step is to construct the grid beam. During construction, the planting pipes, planting pots and supply devices are arranged. After construction is completed, plants are planted in the planting pots and the prepared liquid nutrients are injected into the nutrient tank. The third step involves the monitoring probe periodically monitoring the moisture content W and electrical conductivity σ at the end of the planting tube and transmitting this data to the controller. The controller then determines the appropriate values ​​for the moisture content W and electrical conductivity σ. If W≤W min , or W min <W<W max And σ≤σmin If the variable frequency pump is activated or kept in operation, liquid nutrients are delivered into the planting pot through the planting pipe, and then the third step is performed again. Otherwise, W≥W max , or W min <W<W max And σ>σ min Turn off or keep the variable frequency pump in a stopped state to stop supplying liquid nutrients to the planting pots through the planting pipe, and then proceed to the third step again.

[0017] Furthermore, the planting experiment in the first step was conducted as follows: S1. The moisture content and electrical conductivity of the solid substrate in the planting pot were determined by irrigating with deionized water under conditions of added and unadded solid nutrients, and used as the reference moisture and reference nutrients. S2. Set up multiple planting pots, and irrigate the solid substrate in the planting pots with liquid nutrients according to the reference moisture and reference nutrients, so that the moisture and nutrients in the solid substrate in each planting pot are gradient. S3. Monitor the growth status indicators of the selected plants, including plant height, fresh weight, dry weight, number of leaves, root weight, root length, root diameter, root volume, and root density. Using a multi-objective optimization algorithm, with water, nutrients, and plant growth status indicators including plant height, fresh weight, dry weight, number of leaves, root weight, root length, root diameter, root volume, and root density as objectives, determine the water and nutrient thresholds under the optimal conditions for plant growth status indicators. S4. Define the upper and lower limits of the moisture threshold as W, respectively, using water content as the denominator. max and W min The upper and lower limits of the nutrient threshold are represented by conductivity as σ. max and σ min .

[0018] This invention provides a grid beam ecological slope protection reinforcement structure and method based on root planting, which has the following beneficial effects: 1. This invention delivers nutrients to planting pots containing plants via planting tubes. Utilizing the nutrient-seeking behavior of plant roots, it induces the plant roots to grow directionally from the front to the back of the planting tube. This causes the plant roots to repeatedly wrap around the lattice beam, binding it to the beam as a whole. This effectively improves the bonding force between the lattice beam and the soil and plant roots, solving the problem of localized soil and water loss within the lattice beam under extreme conditions. It also helps ensure the soil and water conservation performance and ecological slope protection effect of the slope protection reinforcement structure. 2. In this invention, solid nutrients are pre-mixed in proportion within the solid substrate filled in the planting tube, which can more stably and accurately control the initial gradient state of water and nutrients in the planting tube, so as to better achieve the directional induction of plant root growth direction. At the same time, it can reduce the frequency of liquid nutrient delivery during plant growth and reduce operation and maintenance costs.

[0019] 3. The planting tube of the present invention is made of biodegradable material, which allows plant roots to take root in deeper soil layers nearby after the planting tube degrades, further improving the support effect of the slope protection reinforcement structure.

[0020] 4. The method of the present invention monitors the moisture content and electrical conductivity at the end of the planting tube and adjusts the supply of liquid nutrients from the planting tube to the planting pot accordingly. This provides a suitable environment for plant roots to grow, ensures the full growth of plant roots, and continuously induces plant roots to grow along the planting tube. This ensures that the grid beam and plant roots intertwine to form an integral structure, achieving relatively ideal soil conservation performance and ecological slope protection effect. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the isometric structure of the present invention; Figure 2 This is a top view of the structure of the present invention; Figure 3 This is a schematic diagram of the supply device structure of the present invention.

[0022] In the picture: 1. Lattice beam; 2. Pore channel; 3. Planting pipe; 4. Planting pot; 5. Supply device; 51. Variable frequency pump; 52. Nutrient bin; 53. Controller. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] A root-planting-based lattice beam ecological slope protection reinforcement structure, such as Figures 1-3 As shown, its structural relationship is as follows: it includes a lattice beam 1 and a planting pot 4 for planting vegetation, as well as a supply device 5 and a planting pipe 3. The lattice beam 1 has through-hole channels 2, and the opening of the through-hole channels 2 should not affect the structural safety of the lattice beam 1; The planting pot 4 is connected to the front end of at least one planting tube 3. The connection position between the planting tube 3 and the planting pot 4 is preferably, but not limited to, the bottom of the planting pot 4. The planting tube 3 is set through at least one pore channel 2. The planting tube 3 is filled with a solid substrate. The solid substrate is preferably sand, straw powder, coconut shell powder, horticultural soil, ceramsite and activated carbon, etc. The end of the planting tube 3 is connected to the supply device 5. The supply device 5 delivers liquid nutrients containing water and nutrients into the planting tube 3. The liquid nutrients include, but are not limited to, water-soluble fertilizers containing macro-elements, auxin IBA / NAA, soluble rooting powder, humic acid solution, etc.

[0025] Preferably, the concentration of water and nutrients in the planting tube 3 increases from the front end to the back end of the planting tube 3, so as to induce the plant roots to grow in a directional direction from the front end to the back end of the planting tube 3.

[0026] Preferably, the solid substrate filled in the planting tube 3 is premixed with solid nutrients, and the mass ratio of solid nutrients to solid substrate increases from the front end to the rear end of the planting tube 3.

[0027] Pre-mixing solid nutrients in a solid matrix in a certain proportion can more stably and accurately control the initial gradient state of water and nutrients in the planting tube 3, so as to better achieve the directional induction of plant root growth direction, while reducing the frequency of liquid nutrient delivery during plant growth and reducing operation and maintenance costs. Solid nutrients include, but are not limited to, rooting powder, macronutrient solid fertilizer, solid organic fertilizer, slow-release nitrogen, phosphorus and potassium compound fertilizer, etc.

[0028] Preferably, the planting tube 3 is interspersed among the pore channels 2 opened on the lattice beam 1 and repeatedly wrapped around the lattice beam 1 to maximize the integration of the plant root system with the lattice beam structure and achieve optimal soil and water conservation performance and ecological slope protection effect. The total number of pore channels 2 through which the planting tube 3 passes and the length of the planting tube 3 should be reasonably set according to the root system characteristics of the vegetation planted in the planting pot 4.

[0029] Preferably, the planting tube 3 is made of a biodegradable material, preferably biodegradable plastic, so that the plant roots can take root in the nearby deeper soil layer after the planting tube 3 degrades, further improving the support effect of the slope protection reinforcement structure.

[0030] Preferably, the nutrient supply device 5 includes a variable frequency pump 51, a nutrient silo 52, a controller 53, and a monitoring probe; The monitoring probe is installed inside the front end of the planting tube 3 to monitor the moisture content and electrical conductivity; The controller 53 is connected to the monitoring probe and the variable frequency pump 51. The inlet and outlet of the variable frequency pump 51 are connected to the nutrient bin 52 and the end of the planting tube 3, respectively. The supply device 5 is preferably powered by a solar cell module.

[0031] A root-planting-based lattice beam ecological slope protection reinforcement method, using the aforementioned root-planting-based lattice beam ecological slope protection reinforcement structure for slope support, includes the following processes: The first step is to select the plant species. When selecting plants, it is advisable to choose species with fast-growing, long-rooted, and root-growth-sensitive root systems. If the suitable water and nutrient thresholds for the plant species in the pot can be determined based on existing planting experiments, the upper and lower limits of the water thresholds are represented by water content as W. max and W min The upper and lower limits of the nutrient threshold are represented by conductivity as σ. max and σ min Then proceed to the second step; Otherwise, the suitable water and nutrient thresholds for this type of plant to grow in pots cannot be determined based on existing planting experiments, leading to W max =W0×90%, W min =W0×45%, σ max =4 ms / cm, σ min =0.4 ms / cm; Wherein, W0 is the field water holding capacity suitable for the growth of this type of plant; The second step is to construct the grid beam. During construction, the planting pipes, planting pots and supply devices are arranged. After construction is completed, plants are planted in the planting pots and the prepared liquid nutrients are injected into the nutrient tank. The third step involves the monitoring probe periodically monitoring the moisture content W and electrical conductivity σ at the end of the planting tube and transmitting this data to the controller. The controller then determines the appropriate values ​​for the moisture content W and electrical conductivity σ. If W≤W min , or W min <W<W max And σ≤σ min If the variable frequency pump is activated or kept in operation, liquid nutrients are delivered into the planting pot through the planting pipe, and then the third step is performed again. Otherwise, W≥W max , or W min <W<W max And σ>σ min Turn off or keep the variable frequency pump in a stopped state to stop supplying liquid nutrients to the planting pots through the planting pipe, and then proceed to the third step again.

[0032] Preferably, the planting experiment in the first step is conducted according to the following method: S1. The moisture content and electrical conductivity of the solid substrate in the planting pot were determined by irrigating with deionized water under conditions of added and unadded solid nutrients, and used as the reference moisture and reference nutrients. S2. Set up multiple planting pots, and irrigate the solid substrate in the planting pots with liquid nutrients according to the reference moisture and reference nutrients, so that the moisture and nutrients in the solid substrate in each planting pot are gradient. S3. Monitor the growth status indicators of the selected plants, including plant height, fresh weight, dry weight, number of leaves, root weight, root length, root diameter, root volume, and root density. Using a multi-objective optimization algorithm, with water, nutrients, and plant growth status indicators including plant height, fresh weight, dry weight, number of leaves, root weight, root length, root diameter, root volume, and root density as objectives, determine the water and nutrient thresholds under the optimal conditions for plant growth status indicators. S4. Define the upper and lower limits of the moisture threshold as W, respectively, using water content as the denominator. max and W min The upper and lower limits of the nutrient threshold are represented by conductivity as σ. max and σ min .

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0034] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for strengthening ecological slope protection using a lattice beam structure based on root-planting, characterized in that: The root-based lattice beam ecological slope protection reinforcement structure includes a lattice beam (1), a supply device (5), a planting pipe (3), and a planting pot (4) for planting vegetation. The lattice beam (1) has through-hole channels (2). The planting pot (4) is connected to the front end of at least one of the planting tubes (3), the planting tubes (3) are arranged through at least one of the pore channels (2), and the planting tubes (3) are filled with solid substrate. The end of the planting tube (3) is connected to the supply device (5), and the supply device (5) delivers liquid nutrients containing water and nutrients into the planting tube (3). The nutrient supply device (5) includes a variable frequency pump (51), a nutrient silo (52), a controller (53), and a monitoring probe; The monitoring probe is located inside the front end of the planting tube (3) and is used to monitor the moisture content and electrical conductivity. The controller (53) is connected to the monitoring probe and the variable frequency pump (51) via data communication. The inlet and outlet of the variable frequency pump (51) are connected to the end of the nutrient bin (52) and the planting tube (3), respectively. The concentration of water and nutrients in the planting tube (3) increases from the front end to the rear end of the planting tube (3); Root-based ecological slope protection enhancement method using lattice beams Includes the following processes: The first step is to select the plant species to be planted. If the suitable water and nutrient thresholds for the growth of this plant species in the pot can be determined based on existing planting experiments, the upper and lower limits of the water threshold are represented by the water content as W. max and W min The upper and lower limits of the nutrient threshold are represented by conductivity σ. max and σ min Then proceed to the second step; Otherwise, the suitable water and nutrient thresholds for this type of plant to grow in pots cannot be determined based on existing planting experiments, leading to W max =W0×90%, W min =W0×45%, σ max =4 ms / cm, σ min =0.4 ms / cm; Wherein, W0 is the field water holding capacity suitable for the growth of this type of plant; The second step is to construct the lattice beam (1). During the construction, the planting pipe (3), planting pot (4) and supply device (5) are arranged. After the construction is completed, plants are planted in the planting pot (4) and liquid nutrients are injected into the nutrient bin (52). The third step involves the monitoring probe periodically monitoring the moisture content W and electrical conductivity σ within the planting tube (3) and transmitting this information to the controller (53). The controller (53) then determines the moisture content W and electrical conductivity σ. If W≤W min , or W min <W<W max And σ≤σ min If the variable frequency pump (51) is started or the variable frequency pump (51) is kept in working state, liquid nutrients are delivered into the planting pot (4) through the planting pipe (3), and then the third step is carried out again. Otherwise, W≥W max , or W min <W<W max And σ>σ min Turn off or keep the variable frequency pump (51) in a stopped state, and stop delivering liquid nutrients to the planting pot (4) through the planting pipe (3), and then proceed to the third step again.

2. The method for strengthening ecological slope protection based on root-planting grid beams according to claim 1, characterized in that, The planting experiment in the first step was conducted as follows: S1. The moisture content and electrical conductivity of the solid substrate in the planting pot were determined by irrigating with deionized water under conditions of added and unadded solid nutrients, and used as the reference moisture and reference nutrients. S2. Set up multiple planting pots, and irrigate the solid substrate in the planting pots with liquid nutrients according to the reference moisture and reference nutrients, so that the moisture and nutrients in the solid substrate in each planting pot are gradient. S3. Monitor the growth status indicators of the selected plants, including plant height, fresh weight, dry weight, number of leaves, root weight, root length, root diameter, root volume, and root density. Using a multi-objective optimization algorithm, with water, nutrients, and plant growth status indicators including plant height, fresh weight, dry weight, number of leaves, root weight, root length, root diameter, root volume, and root density as objectives, determine the water and nutrient thresholds under the optimal conditions for plant growth status indicators. S4. Define the upper and lower limits of the moisture threshold as W, respectively, using water content as the denominator. max and W min The upper and lower limits of the nutrient threshold are represented by conductivity σ. max and σ min .

3. The method for strengthening ecological slope protection based on root-planting grid beams according to claim 2, characterized in that: The solid substrate filled in the planting tube (3) is premixed with solid nutrients, and the mass ratio of solid nutrients to solid substrate increases from the front end to the rear end of the planting tube (3).

4. The method for strengthening ecological slope protection based on root-planting grid beams according to claim 1, characterized in that: The planting tube (3) is interspersed among the pore channels (2) opened on the lattice beam (1) and repeatedly wrapped around the lattice beam (1).

5. The method for strengthening ecological slope protection based on root-planting grid beams according to claim 1, characterized in that: The planting tube (3) is made of biodegradable material.

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