A monitoring platform and method for monitoring root slope protection

Abstract

The present invention discloses a monitoring platform and method for monitoring root slope protection, belonging to the technical field of root slope protection. It includes a scheme design module, an experimental simulation module, a technical guidance and training module, a resource docking and procurement module, an information exchange and cooperation module and a project monitoring and evaluation module; the scheme design module is used to provide users with scheme design services for root slope protection; the experimental simulation module is used to perform simulation tests on root slope protection respectively; the technical guidance and training module is used to provide users with online courses, technical guidance and training services; the resource docking and procurement module is used to provide users with one-stop resource docking and procurement services related to root slope protection; the information exchange and cooperation module: is used to establish technical exchanges and cooperation channels between users and industry experts. This technical solution is used to solve the problems mentioned in the background technology that exist in the root slope protection industry.

Description

Technical Field

[0001] The invention belongs to the technical field of root slope protection, and in particular relates to a monitoring platform and method for monitoring root slope protection. Background Art

[0002] Although the root slope protection technology has broad prospects, there are still some shortcomings in the industry. At present, the standards and specifications of the root slope protection technology have not been fully unified, resulting in various technical solutions and construction standards in the industry. The lack of unified industry standards is not conducive to the standardization and healthy development of the industry. Although the root slope protection technology is lower in cost than the traditional geotechnical slope protection method, there is still a certain construction cost, especially in the selection of grass species, engineering layout and other aspects of the investment is large, for some resource-scarce areas may be difficult to afford. Root slope protection technology requires certain professional knowledge and technical support, but the current relevant professional talents are relatively scarce, and technology promotion and training have become a bottleneck restricting the development of the industry. At the same time, the slope protection effect is difficult to display intuitively. The slope protection effect of the root slope protection technology is not as intuitive as the traditional concrete or stone slope protection, and it cannot immediately show obvious effects. It requires long-term observation and evaluation. This has brought certain difficulties to the promotion and application of the technology.

[0003] In summary, although the root slope protection industry has developed rapidly, it still has some of the above-mentioned shortcomings. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a monitoring platform and method for monitoring root slope protection, so as to solve the problems existing in the root slope protection industry mentioned in the background technology.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention discloses a monitoring platform for monitoring root slope protection, comprising a scheme design module, an experimental simulation module, a technical guidance and training module, a resource docking and procurement module, an information exchange and cooperation module, and a project monitoring and evaluation module;

[0007] The scheme design module is used to provide users with root slope protection scheme design services;

[0008] The experimental simulation module is used to perform simulation tests on root slope protection respectively;

[0009] The technical guidance and training module is used to provide users with online courses, technical guidance and training services;

[0010] The resource docking and procurement module is used to provide users with one-stop resource docking and procurement services related to root slope protection;

[0011] The information exchange and cooperation module is used to establish a technical exchange and cooperation channel between users and industry experts;

[0012] The project monitoring and evaluation module is used to monitor and evaluate the root slope protection project selected by the user.

[0013] Furthermore, when conducting root slope protection simulation tests through the experimental simulation module, discrete element software is used to simulate the situations in which various different root systems act on the user's actual slope protection, and the effect comparison charts between various simulation tests are displayed to the user.

[0014] Furthermore, the experimental simulation module includes:

[0015] Image processing unit: used to obtain the root fractal dimension of plant roots;

[0016] Indoor triaxial test data acquisition unit: used to obtain data related to the shear strength of the root-soil complex due to different root contents and root fractal dimensions in the soil;

[0017] PFC simulation test unit: used for simulation test of root soil, obtaining relevant strength parameters of root soil, and then obtaining the soil strength of root soil;

[0018] Root-soil strength assessment unit: used to assess the impact of root fractal dimension on slope stability and establish a corresponding theoretical model.

[0019] A monitoring method for monitoring root slope protection includes a method for obtaining the fractal dimension of plant roots, comprising the following steps:

[0020] Define the metric space, let the set A∈F(x), where F(x) represents the class of all sets consisting of compactly supported sets in the metric space in the x direction;

[0021] Image preprocessing: import the two-dimensional digital color root system image into Photoshop software, set the gray threshold Gs to transform the original image f1(x, y) into a binary image f2(x, y), and then import the binary image into fractal calculation software;

[0022] To calculate the fractal dimension of the root system, divide the side length of the binary image in equal proportion according to the ratio r, and use F(x) to represent the set of all pixel points on the two-dimensional root system image. Then the fractal dimension d of the root system is,

[0023] d=2+(21gL max -lgS) / lgr

[0024] Due to the linear correlation between lnS and lnr, the least squares method was used to fit the set {lnS, lnr} to calculate the root fractal dimension, where S is the grid area covered by the root system.

[0025] A monitoring method for monitoring root slope protection includes a PFC simulated triaxial compression test to obtain relevant strength parameters of root soil, and then obtain the soil strength of the root soil. The specific steps are:

[0026] Sampling, the process of creating a specimen in the simulation, including setting the number of particles, specimen location, height and width, and generating walls to apply pressure to balance the specimen;

[0027] Add cementation, add a binder to the sample to simulate the viscosity of the soil. By setting the linear connection and stiffness ratio between particles, the cementation effect of the soil can be simulated;

[0028] Visual image, generate function image to intuitively show the changes of sample parameters during the experiment;

[0029] Servo, a servo control system, is used to control the movement of the wall to simulate the force applied to the specimen;

[0030] Load, start the simulation program, apply forces to the specimen, and obtain parameters after the experiment.

[0031] A monitoring method for monitoring root slope protection includes a method for obtaining relevant data on the shear strength of a root-soil complex based on different root contents and root fractal dimensions in the soil through a root-soil triaxial compression test, including the following steps:

[0032] Sample design: six root-soil composite samples with root contents of 0%, 0.2%, 0.4%, 0.6%, 0.8% and 1.0% were determined, and five root distribution patterns were designed: no roots, vertical, inclined, intersecting and mixed;

[0033] Sample preparation: A cylindrical soil sample with a height of 80 mm and a diameter of 39.1 mm was prepared using a mold. The soil sample was poured into the mold in five layers, and each layer was compacted to ensure density;

[0034] Root placement: After the fourth layer of soil is compacted, the mold is removed, and according to the predetermined root distribution pattern, the soil is cut in any direction using a thin steel wire to form gaps for placing the roots, and the roots are evenly placed in the cut gaps;

[0035] Closing and surface treatment of the sample: closing the cut soil part to restore the cylindrical shape, smoothing the surface of the sample to ensure a smooth appearance;

[0036] After the sample is made, the fifth layer of soil is divided into two parts of equal mass. The two parts of soil are poured into the top and bottom of the sample respectively and compacted. After the sample is made, it is left to stand for 24 hours to allow the contact between the roots and the soil to reach a stable state.

[0037] A monitoring method for monitoring root slope protection, including a root soil strength assessment method, comprises the following steps:

[0038] Calculate the stability coefficient k of the bare soil t :

[0039]

[0040] In the formula, c t For the cohesiveness of the soil, is the internal friction angle of the soil, γ t is the bulk density of the slope soil, α is the slope inclination, β is the sliding surface inclination, and h is the slope height;

[0041] Calculate the root soil stability factor

[0042]

[0043] In the formula, c gt is the cohesion of the root-soil complex, is the internal friction angle of the root-soil complex, γ gt is the bulk density of the root soil slope, ρ g is the root density per linear meter, μ is the friction coefficient between roots and soil, D is the equivalent average diameter of the root system, 1 is the equivalent average length of the root system, and z is the depth of the root segment;

[0044] By comparing k t and k gt , evaluate the influence of roots on slope stability.

[0045] Furthermore, the sample making tooling includes a base, a vertical mounting plate is provided in the middle of one end of the base, one end of the vertical mounting is fixed to the base, a horizontal mounting plate is provided on the other end of the vertical mounting plate, a vertically arranged sliding plate is provided on the vertical mounting plate, one end of the sliding plate is slidably connected to the vertical mounting plate, a mounting ring fixedly connected thereto is provided on the other end of the sliding plate, a forming cylinder is provided on the inner side surface of the mounting ring, both ends of the forming cylinder are through-set, a sliding top block is provided inside the end of the forming cylinder facing the base, the sliding top block is slidably connected to the inner side surface of the forming cylinder, and one side of the sliding top block facing the base A push rod is provided on the top, one end of the push rod is fixed on the sliding push block, and the other end of the push rod is rotatably connected to the base, an extrusion block slidably connected to the inner side surface of the other end of the forming cylinder is provided, a hydraulic rod is provided in the middle of the extrusion block, one end of the hydraulic rod is rotatably connected to the extrusion block, and the other end of the hydraulic rod is fixed to the transverse mounting plate, a telescopic rod is provided on the transverse mounting plate, one end of the telescopic rod is fixed to the transverse mounting plate, and a rotatably connected U-shaped mounting frame is provided on the other end of the telescopic rod, a thin steel wire is provided between the two ends of the U-shaped mounting frame, and the two ends of the thin steel wire are detachably connected to the two ends of the U-shaped mounting frame.

[0046] Furthermore, a rotating motor is provided on the base, a first pulley is provided on the output end of the rotating motor, a second pulley is provided on the top rod, and a driving belt is wound around the first pulley and the second pulley.

[0047] Furthermore, the vertical mounting plate is provided with a through slot in the length direction, an operating rod is provided in the through slot, a mounting block is provided on one end of the telescopic rod connected to the U-shaped mounting frame, one end of the operating rod passes through the mounting block and is fixed to the U-shaped mounting frame, and the operating rod is rotatably connected to the mounting block.

[0048] The beneficial effects of the present invention are:

[0049] (1) The method part of this technical solution can accurately evaluate the reinforcement effect of roots on slopes by combining image processing technology and mechanical property evaluation. Traditional slope protection technology mainly relies on experience and macroscopic observation, while this technical solution provides a quantitative analysis method that can more accurately optimize slope protection design. This not only promotes the development of slope protection technology, but also provides a reference for other ecological engineering applications, making root slope protection projects more scientific and reliable, which can greatly reduce the risks of engineering construction and maintenance, while improving the long-term stability and ecological benefits of the project.

[0050] (2) The platform part of this technical solution provides users with a full range of root slope protection solutions to promote the popularization and application of ecological slope protection technology. At the same time, the platform integrates technical support, resource integration, information, communication, project simulation and project monitoring functions to provide users with customized root slope protection services and help ecological environment protection and land resource management.

[0051] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art may be taught from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0053] Figure 1 It is a schematic diagram of the module framework of the monitoring platform for monitoring root slope protection of the present invention;

[0054] Figure 2 It is a schematic diagram of several processing units in the experimental simulation module of the present invention;

[0055] Figure 3 Schematic diagram of a root system binary image of the present invention;

[0056] Figure 4 This is a schematic diagram of the simulation of soil containing roots (confining pressure-time step) during the indoor triaxial test of the present invention;

[0057] Figure 5 This is a schematic diagram of the simulation of soil containing roots (stress in the y direction-time step) during the indoor triaxial test of the present invention;

[0058] Figure 6 This is a schematic diagram of the simulation of soil containing roots (displacement in the y direction-time step) during the indoor triaxial test of the present invention;

[0059] Figure 7 It is a schematic diagram of simulation of soil containing roots (circumferential deformation-time step) during indoor triaxial test of the present invention;

[0060] Figure 8 It is a plan view of the root slope protection of the present invention;

[0061] Fig. 9 A three-dimensional schematic diagram of a sample making tooling of the present invention;

[0062] Fig.10 It is a schematic diagram of the front view and cross-sectional view of the sample making tooling of the present invention.

[0063] The following are marked in the accompanying drawings:

[0064] Base 1, vertical mounting plate 2, sliding plate 3, mounting ring 4, forming cylinder 5, sliding top block 6, top rod 7, bearing 8, second pulley 9, first pulley 10, driving belt 11, rotating motor 12, extrusion block 13, hydraulic rod 14, transverse mounting plate 15, telescopic rod 16, mounting block 17, U-shaped mounting frame 18, thin steel wire 19, operating rod 20, through groove 21. DETAILED DESCRIPTION

[0065] like Figures 1 to 8 As shown, the present invention provides a monitoring platform and method for monitoring root slope protection, wherein the main functional modules of the platform part include:

[0066] Scheme design module: The platform provides customized slope protection scheme design services based on user needs and site conditions. From terrain analysis to vegetation selection, the platform tailors the most suitable slope protection scheme for users to ensure the long-term stability of the ecological environment;

[0067] Experimental simulation module: Use PFC and other professional software (discrete element related software, such as 3DEC, DDA, etc.) to conduct root slope protection simulation experiments to evaluate the stability and effect of the slope protection structure. Users can understand the advantages and disadvantages of different schemes through simulation results, and make corresponding adjustments to improve the quality of the project;

[0068] Technical guidance and training module: Provide online courses, technical guidance and training services to help users gain a deeper understanding of the principles and practical operations of root slope protection technology. The professional training team will provide users with practical technical support to enhance their slope protection project management and execution capabilities;

[0069] Resource docking and procurement module: The platform integrates the resources of seedlings, materials, and equipment suppliers related to root slope protection, providing users with one-stop resource docking and procurement services to ensure that users obtain high-quality slope protection materials and equipment;

[0070] Information exchange and cooperation module: A root slope protection technology exchange platform has been established to invite industry experts and users to share experiences and best practices. Users can communicate and cooperate with other professionals on the platform to jointly solve problems in slope protection projects and promote continuous innovation and progress in technology;

[0071] Project monitoring and evaluation module: A complete project monitoring system has been established to conduct real-time monitoring and evaluation of the root slope protection project. Through data analysis and evaluation reports, problems can be discovered and solutions can be proposed in a timely manner to ensure the quality and effectiveness of the slope protection project.

[0072] In one feasible method, when conducting root slope protection simulation tests through the experimental simulation module, discrete element software is used to simulate the effects of various different root systems on the user's actual slope protection, and the user is shown a comparison chart of the effects of various simulation tests. In this way, customers can understand the importance of roots to slope protection and select suitable plant species.

[0073] This can be achieved through the following steps:

[0074] Define simulation objectives and parameters: Determine whether the purpose of the simulation is to evaluate the contribution of roots to soil stability, the impact of root distribution, or the effect of root type on soil reinforcement;

[0075] Collect actual slope protection data of users: Obtain detailed data of actual slope protection of users, including soil type, slope angle, vegetation type and distribution, soil type and root depth, etc.;

[0076] Create root system models: Use discrete element software to create different types of root system models, including root geometry, size, distribution density and direction;

[0077] Setting soil model: According to the physical and mechanical properties of the actual soil, set the parameters of the soil model, such as particle size, density, internal friction angle and cohesion;

[0078] Conduct simulation tests: Use discrete element software to simulate different root system models and apply different loading conditions, such as static load, dynamic load or water pressure;

[0079] Data collection and analysis: Collect key data during the simulation process, such as soil displacement, root-soil interaction force, slope stability coefficient, etc.

[0080] Generate effect comparison chart: Use the software's visualization tools to generate comparison charts of the effects of different root system models on slope stability, including displacement field, stress distribution, and stability coefficient;

[0081] Evaluate and interpret results: Analyze simulation results of different root models, evaluate their contribution to slope stability, and provide scientific interpretations;

[0082] User interaction and presentation: The simulation results are presented through a user interface, allowing users to interactively compare the effects of different root models.

[0083] In this way, users can understand the impact of different root systems on slope stability, optimize the design, reduce the need for field tests, and provide a scientific basis for ecological engineering.

[0084] Furthermore, the experimental simulation module includes:

[0085] Image processing unit: used to obtain the root fractal dimension of plant roots;

[0086] Specifically, the root structure of vegetation is complex and irregular, and is greatly affected by environmental factors. At the same time, the growth characteristics of different types of vegetation are also different. Fractal theory can quantitatively describe the root geometry, fractal characteristics and expansion range, and fractal dimension can indicate the degree of root development and branching ability;

[0087] Regarding fractal theory, this project uses the box dimension method, which has the following definition: Let set A∈F(x), where F(x) represents the set of all compactly supported sets in the x direction of the metric space, and ρ is the measure. (×, ρ) is the metric space, and Nδ(A) can be expressed as the minimum number of closed spherical regions with a radius of δ>0 covering the area of ​​set A. If it exists, the limit is taken as the box dimension of set A.

[0088] The selected two-dimensional digital color root image is transferred into Photoshop software, and the original image f1(x, y) is converted into a binary image f2(x, y) by setting the grayscale threshold Gs. At this time, there are only two colors, white and black, in the calculation area. The distribution of vegetation roots can be observed in the black area, while the white area is a blank area without roots. The processed binary image is transferred into Fractal Fox fractal calculation software, and the box dimension algorithm is used to calculate the fractal dimension of the root system. The side length is divided in equal proportion according to the ratio r, and the grid density is changed by adjusting r. At this time, the grid side length and the number of root coverage grids are calculated.

[0089] F(x) is used to represent the set of all pixels on the two-dimensional root system image, and the fractal feature is expressed by the power law function as follows:

[0090] N==rd, where N is the number of pixels covering the network and d is the fractal dimension. The grid area S covered by the root system is: S=N·(rLmax)2. Combining the above two equations, we can get: S=L 2 max x·r 2-d , take the natural logarithm of the formula as lgS = 2lgL max +(2-d)lgr, then the fractal dimension d of the root system is: d=2+(2lgL max -lgS) / lgr, it can be seen that there is a linear correlation between lnS and lnr, and the least squares method is used to fit the set {lnS, lnr} to calculate the root fractal dimension.

[0091] Indoor triaxial test data acquisition unit: used to obtain data related to the shear strength of the root-soil complex due to different root contents and root fractal dimensions in the soil, such as Figure 4-Figure 7 ;

[0092] The specific experimental method is to study the influence of root content and root distribution on the shear strength of root-soil complex. Considering that the root distribution is not affected by the growth environment, five root-soil complex samples with root contents of 0, 0.2%, 0.4%, 0.6%, 0.8%, and 1.0% were prepared. A total of five groups were designed for the experiment, and the root distribution modes were rootless, vertical, inclined, intersecting, and mixed. In addition, the influence of different root distribution modes on the cohesion and internal friction angle of the root-soil complex under the condition of 0.6% root content was analyzed.

[0093] The test instrument is a British GDS triaxial tester, with a maximum axial force of 60kN and an accuracy of 0.1% of the sensor range. The displacement range is 0-100mm, with an accuracy of 0.07%. The test confining pressures are 50, 100, 150 and 200kPa, respectively, and a maximum of 1,000 data can be recorded in each test cycle.

[0094] Prepare the root-soil composite sample, which is a cylinder with a height of 80 mm and a diameter of 39.1 mm. Pour the configured soil into the sample making tooling in 5 layers and compact it. After the 4th layer of soil is compacted, use fine steel wire to flexibly cut the sample in any direction according to different root distribution patterns, and evenly place the roots in the gaps of the cut samples. After the roots are placed, close the cut samples and smooth the surface of the samples. Divide the 5th layer of soil into 2 parts of equal mass, pour them into the top and bottom of the sample respectively and compact them to avoid different densities at different positions of the sample during the compaction process. After the sample is made, let it stand for 24 hours to ensure that the contact between the roots and the soil reaches a relatively stable state.

[0095] like Fig. 9 and Fig.10As shown, in an implementable manner, the sample making tooling includes a base 1, a vertical mounting plate 2 is provided in the middle of one end of the base 1, one end of the vertical mounting is fixed to the base 1, a horizontal mounting plate 15 is provided on the other end of the vertical mounting plate 2, a vertically arranged sliding plate 3 is provided on the vertical mounting plate 2, one end of the sliding plate 3 is slidably connected to the vertical mounting plate 2, and the sliding connection can be made by means of a slide groove and a slider, a mounting ring 4 fixedly connected thereto is provided on the other end of the sliding plate 3, a forming cylinder 5 is provided on the inner side surface of the mounting ring 4, both ends of the forming cylinder 5 are through-set, a sliding top block 6 is provided inside the end of the forming cylinder 5 facing the base 1, the sliding top block 6 is slidably connected to the inner side surface of the forming cylinder 5, a top rod 7 is provided on the side of the sliding top block 6 facing the base 1, and the top rod 7 One end of the forming cylinder 5 is fixed to the sliding top block 6, and the other end of the top rod 7 is rotatably connected to the base 1 and is rotatably connected through the bearing 8. The inner side surface of the other end of the forming cylinder 5 is provided with an extrusion block 13 slidably connected thereto, and a hydraulic rod 14 is provided in the middle of the extrusion block 13. One end of the hydraulic rod 14 is rotatably connected to the extrusion block 13, and the other end of the hydraulic rod 14 is fixed to the transverse mounting plate 15. A telescopic rod 16 is provided on the transverse mounting plate 15, which can be understood as a telescopic arrangement similar to that of a fishing rod. One end of the telescopic rod 16 is fixed to the transverse mounting plate 15, and the other end of the telescopic rod 16 is provided with a rotatably connected U-shaped mounting frame 18. A thin steel wire 19 is provided between the two ends of the U-shaped mounting frame 18, and the two ends of the thin steel wire 19 are respectively detachably connected to the two ends of the U-shaped mounting frame 18.

[0096] The soil is transferred into the forming tube 5, and the extrusion block 13 is driven to move by the hydraulic rod 14 and under the support of the sliding top block 6, the soil can be compacted. After compaction, it is only necessary to slide the sliding plate 3 downward to separate the forming tube 5 from the compacted cylindrical soil. At this time, it is only necessary to pull the telescopic rod 16 and move the thin steel wire 19 set on it down to different positions of the soil to contact it. Then, by rotating the top rod 7, the compacted soil can be driven to rotate, and then the soil and the thin steel wire 19 can be rotated to contact and cut the soil. Of course, if the soil needs to be cut vertically, the thin steel wire 19 can be cut by horizontal feeding. After the cutting is completed, the soil can be changed by rotating the top rod 7. The contact position with the similar soil can be changed. It is not difficult to understand that by using the top rod 7 and the thin steel wire 19 in combination, the soil can be cut vertically, inclined, intersecting and mixed, which is convenient for root implantation in various distribution modes during the experiment.

[0097] With this arrangement, the formed soil does not need to be moved to avoid damage to the formed soil. At the same time, it is not difficult to understand that when the forming cylinder 5 is separated from the soil, the hydraulic rod 14 should relatively reduce the squeezing effect on the soil so that the sliding top block 6 and the squeezing block 13 can be clamped at both ends of the formed soil. In addition, the technical solution separates the formed soil from the forming cylinder 5 by moving the forming cylinder 5, rather than fixing the forming cylinder 5 and ejecting the formed soil inside it. The advantage is that the height of the vertical mounting plate 2 can be reduced, because to move the forming cylinder 5 away, it only needs the sum of the maximum elongation lengths of the ejector rod 7 and the hydraulic rod 14 to be the same as the height of the vertical mounting plate 2. At the same time, the forming cylinder 5 moves downward to make room for the thin steel wire 19 to work without causing interference.

[0098] In one feasible manner, a rotating motor 12 is provided on the base 1, a first pulley 10 is provided on the output end of the rotating motor 12, a second pulley 9 is provided on the top rod 7, a driving belt 11 is wound around the first pulley 10 and the second pulley 9, and the top rod 7 is rotated by the rotating motor 12. The purpose of driving the top rod 7 by means of a pulley is to avoid the force of the hydraulic rod 14 being directly transmitted to the output shaft of the rotating motor 12, which would cause the problem of axial force damage to the rotating motor 12.

[0099] In one feasible manner, a through slot 21 is provided in the length direction of the vertical mounting plate 2, an operating rod 20 is provided in the through slot 21, a mounting block 17 is provided on one end of the telescopic rod 16 connected to the U-shaped mounting frame 18, one end of the operating rod 20 passes through the mounting block 17 and is fixed to the U-shaped mounting frame 18, and the operating rod 20 is rotatably connected to the mounting block 17.

[0100] The operating rod 20 can move up and down and rotate in the through groove 21. Therefore, the experimenter can control the position and angle of the thin steel wire 19 by controlling the position and angle of the operating rod 20, so as to diversify the contact angle of the thin steel wire 19 with the formed soil, thereby improving the effect of cutting the formed soil at any position. At the same time, the operating rod 20 can move horizontally in the mounting block 17, thereby pushing the thin steel wire 19 to move horizontally, thereby realizing the vertical cutting operation of the formed soil.

[0101] It should be particularly noted that telescopic plates can be set on the outer sides of both ends of the U-shaped mounting frame 18, one end of the telescopic plate is slidably connected to the end of the U-shaped mounting frame 18, and the other end of the telescopic plate is connected by winding a winding column and the end of a thin steel wire 19, and a locking bolt is provided on the end of the U-shaped mounting frame 18 to limit the telescopic position of the telescopic plate. This setting method can set the distance between the thin steel wire 19 and the end of the U-shaped mounting frame 18, thereby adjusting the feed amount during vertical cutting of the formed soil. Therefore, when cutting to a certain depth, the outer surface of the formed soil will contact and limit the inner side surface of the closed end of the U-shaped mounting frame 18, and the feed amount of the thin steel wire 19 can be adjusted and controlled in this way.

[0102] PFC simulation test unit: used for simulation test of root soil, obtaining relevant strength parameters of root soil, and then obtaining the soil strength of root soil;

[0103] The specific method is as follows: In this method, the corresponding parameters are obtained mainly through PFC3D simulation test to determine the structural strength of the soil. The difference from indoor experiments is that it can be programmed and the experimental process can be generalized, so that soils with different parameters can also quickly obtain corresponding parameters.

[0104] Sampling: set the number of balls, sample position, sample height and sample width, generate a wall that can apply pressure, and balance the sample;

[0105] Add cementation: Set the mass and porosity of the sample soil, set the balls to be linearly connected, and apply cementation between particles according to the stiffness ratio to make the sample as sticky as soil;

[0106] Image visualization: Generate a series of function images, and intuitively obtain the changes in sample parameters during the experiment;

[0107] Servo: Servo is a control system that sets a function for the wall so that the wall can be controlled to move. The wall movement is converted into a certain force applied by the wall to the specimen through a formula;

[0108] Loading: Start the program, begin to apply force to the sample, set the starting conditions and ending conditions, and obtain a series of parameters after completion.

[0109] Root-soil strength assessment unit: used to assess the influence of root fractal dimension on slope stability and establish corresponding theoretical models;

[0110] The specific implementation method is as follows: the tensile strength of the root system and the friction characteristics of the root-soil interface are important indicators for measuring the root system's soil fixation and slope protection. In order to study the influence of the root system's fractal dimension on the slope stability, the landslide body on the slope surface is analyzed. The landslide body is taken as the object, and the volume V of the landslide body S1 area per meter along the cross slope is calculated. s It is expressed as:

[0111]

[0112] The bulk density of slope soil is γ t , then the gravity G of the landslide body S1 in the plain soil slope t for:

[0113]

[0114] Gravity G of the landslide body S1 area in the slope protection gt for:

[0115]

[0116] The slope stability coefficient K is the anti-sliding force T of the landslide body. r With sliding force T s The ratio is: the sliding force of the landslide body moving downward along the slope surface by its own gravity, and the anti-sliding force is closely related to the shear strength of the root-soil complex on the slope and the root tensile force f. Assuming that the distribution of the vetiver root system on the slope surface is the same and there is sufficient friction and restraint on the root surface, the root anti-sliding force F per linear meter of the slope surface is:

[0117]

[0118] Where ρ g is the root density per linear meter, roots / m; f is the ultimate tensile strength of a single root system.

[0119] According to known technology, the single limit tensile force f is:

[0120]

[0121] Where μ is the friction coefficient between roots and soil; D is the equivalent average diameter of the root system, mm; 1 is the equivalent average length of the root system, mm; z is the root segment depth, mm.

[0122] In summary, the soil stability coefficient k t It can be expressed as:

[0123]

[0124] Where c t is the cohesion of the bare soil, kPa; The internal friction angle of soil is (°).

[0125] The root soil stability coefficient k gt It can be expressed as:

[0126]

[0127] Where c gtis the cohesion of the root-soil complex, kPa; Root soil is the internal friction angle of the root soil complex, (°).

[0128] From the specific test analysis, it can be seen that the slope stability coefficient of the slope with vetiver grass slope protection is higher than that of the plain soil slope. As the root content increases, the slope stability coefficient gradually increases. When the root content is 1.0%, the slope stability coefficient is increased by 28.4% compared with the plain soil slope, and the soil consolidation and slope protection effect is obvious. Under the action of the sliding body, the shear stress generated inside the slope soil is transferred to the root system. The root system can generate tensile stress through its own tensile deformation, which significantly increases the shear strength of the root-soil complex, thereby improving the stability of the slope.

[0129] At the same time, when the root content in the root-soil complex is 0.6%, different root distribution modes have different degrees of influence on slope stability. The slope stability coefficients under vertical, inclined, intersecting and mixed distribution are 1.02, 1.06, 1.09 and 1.10 respectively. Compared with the plain soil slope (root content is 0), the slope stability coefficients are increased by 7.3%, 11.6%, 14.7% and 15.8% respectively. It can be seen that the influence of root intersection and mixed distribution modes on slope stability is similar. The reason is that the roots intersect with each other, which has a significant effect on improving the shear strength of the root-soil complex.

[0130] For the root intersection distribution mode, the correlation analysis of the slope stability coefficient and root content was carried out. The fitting function was Kroot soil = 0.2886η + 0.9224, and the determination coefficient was 0.9726. The fitting degree was high, and there was a linear relationship between the two. Since the root content had a very small effect on the internal friction angle of the root-soil composite, it was ignored. Further analysis of the correlation between slope stability and root fractal dimension showed a determination coefficient of 0.9586. We used the strength reduction method to calculate the slope stability coefficient of 1.35 under the condition of 1.0% root content, and the difference between the numerical calculation and the outdoor test results was 10.6%. The analysis shows that the slope stability can be analyzed by the root fractal dimension to a certain extent.

[0131] The research on root slope protection technology based on fractal theory is of great significance. It can deepen the understanding of grass root structure. Fractal theory can help deepen the understanding of root structure and reveal its self-similarity and distribution law at different scales. By analyzing the fractal characteristics of the root system, we can more accurately grasp its spatial distribution and action mechanism in the soil, and provide a scientific basis for the optimization design of root slope protection technology. For root slope protection technology, fractal dimension improves the effect and stability of root slope protection technology. The application of fractal theory can optimize the design scheme and construction layout of the root system, and improve the effect and stability of slope protection. In-depth study of the fractal characteristics and spatial structure of the root system will help to select suitable grass species and planting density, improve the growth rate and anti-erosion ability of the grass root system, thereby effectively reducing soil erosion and protecting soil and ecological environment. From a global perspective, fractal theory can promote the innovation and application of root slope protection technology. The application of fractal theory provides new ideas and methods for the innovation and application of root slope protection technology. Through in-depth research on the fractal characteristics and mechanisms of root slope protection engineering, we can continuously optimize technical solutions, promote the innovation and application of root slope protection technology, and provide more effective solutions to solve land erosion and ecological environment protection. The application of fractal theory involves multiple disciplines such as mathematics, geography, and ecology, which helps to promote cross-integration and cooperation between different disciplines. Root slope protection technology is a comprehensive ecological engineering technology that requires professional knowledge and technical support from different disciplines. The application of fractal theory provides a new opportunity and platform for interdisciplinary research. The research on grass root slope protection technology based on fractal theory has important theoretical and practical significance, which helps to improve the effect and stability of root slope protection technology, promote technological innovation and application, and promote ecological environment protection and sustainable development.

[0132] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A monitoring method for monitoring root slope protection, characterized in that: The method for obtaining the fractal dimension of a plant root system comprises the following steps: Define the metric space, let the set A∈F(x), where F(x) represents the class of all sets consisting of compactly supported sets in the metric space in the x direction; Image preprocessing: import the two-dimensional digital color root system image into Photoshop software, set the gray threshold Gs to transform the original image f1(x, y) into a binary image f2(x, y), and then import the binary image into fractal calculation software; To calculate the fractal dimension of the root system, divide the side length of the binary image in equal proportion according to the ratio r, and use F(x) to represent the set of all pixel points on the two-dimensional root system image. Then the fractal dimension d of the root system is, d=2+(2lgL max -lgS) / lgr Due to the linear correlation between lnS and lnr, the least squares method was used to fit the set {lnS, lnr} to calculate the root system fractal dimension, where S is the grid area covered by the root system; It also includes a method for obtaining relevant strength parameters of the root soil by simulating a triaxial compression test with PFC, and then obtaining the soil strength of the root soil. The specific steps are as follows: Sampling, the process of creating a specimen in the simulation, including setting the number of particles, specimen location, height and width, and generating walls to apply pressure to balance the specimen; Add cementation: add a binder to the sample to simulate the viscosity of the soil, and simulate the cementation effect of the soil by setting the linear connection and stiffness ratio between particles; Visual image, generate function image to intuitively show the changes of sample parameters during the experiment; Servo, a servo control system, is used to control the movement of the wall to simulate the force applied to the specimen; Load, start the simulation program, apply force to the specimen, and obtain parameters after the experiment; The invention also includes a method for obtaining data related to the shear strength of a root-soil complex due to different root contents and root fractal dimensions in the soil through a root-soil triaxial compression test, comprising the following steps: Sample design: six root-soil composite samples with root contents of 0%, 0.2%, 0.4%, 0.6%, 0.8% and 1.0% were determined, and five root distribution patterns were designed: no roots, vertical, inclined, intersecting and mixed; Sample preparation: Use the sample preparation tool to prepare cylindrical soil samples with a height of 80 mm and a diameter of 39.1 mm. Pour the soil samples into the mold in five layers, and compact each layer to ensure density; Root placement: After the fourth layer of soil is compacted, the mold is removed, and according to the predetermined root distribution pattern, the sample making tool is used to cut the soil in any direction to form gaps for placing the roots, and the roots are evenly placed in the cut gaps; Closing and surface treatment of the sample: closing the cut soil part to restore the cylindrical shape, smoothing the surface of the sample to ensure a smooth appearance; After the sample is made, the fifth layer of soil is divided into two parts of equal mass, and the two parts of soil are poured into the top and bottom of the sample respectively, and compacted. After the sample is made, it is left to stand for 24 hours to allow the contact between the root system and the soil to reach a stable state; It also includes a root soil strength assessment method, including the following steps: Calculate the stability coefficient k of the bare soil t : In the formula, c t For the cohesiveness of the soil, is the internal friction angle of the soil, γ t is the bulk density of the slope soil, α is the slope inclination, β is the sliding surface inclination, and h is the slope height; Calculate the root soil stability coefficient k gt : In the formula, c gt is the cohesion of the root-soil complex, is the internal friction angle of the root-soil complex, γ gt is the bulk density of the root soil slope, ρ g is the root density per linear meter, μ is the friction coefficient between roots and soil, D is the equivalent average root diameter, l is the equivalent average root length, and z is the root segment depth; By comparing k t and k gt , assess the influence of roots on slope stability; The sample making tooling comprises a base, a vertical mounting plate is provided in the middle of one end of the base, one end of the vertical mounting is fixed on the base, a horizontal mounting plate is provided on the other end of the vertical mounting plate, a vertically arranged sliding plate is provided on the vertical mounting plate, one end of the sliding plate is slidably connected to the vertical mounting plate, a mounting ring fixedly connected thereto is provided on the other end of the sliding plate, a forming cylinder is provided on the inner side surface of the mounting ring, two ends of the forming cylinder are through-set, a sliding top block is provided inside the end of the forming cylinder facing the base, the sliding top block is slidably connected to the inner side surface of the forming cylinder, and one side of the sliding top block facing the base A push rod is provided on the top, one end of the push rod is fixed on the sliding push block, and the other end of the push rod is rotatably connected to the base, an extrusion block slidably connected to the inner side surface of the other end of the forming cylinder is provided, a hydraulic rod is provided in the middle of the extrusion block, one end of the hydraulic rod is rotatably connected to the extrusion block, and the other end of the hydraulic rod is fixed to the transverse mounting plate, a telescopic rod is provided on the transverse mounting plate, one end of the telescopic rod is fixed to the transverse mounting plate, and a rotatably connected U-shaped mounting frame is provided on the other end of the telescopic rod, a thin steel wire is provided between the two ends of the U-shaped mounting frame, and the two ends of the thin steel wire are detachably connected to the two ends of the U-shaped mounting frame.

2. A monitoring method for monitoring root slope protection according to claim 1, characterized in that: A rotating motor is arranged on the base, a first belt pulley is arranged on the output end of the rotating motor, a second belt pulley is arranged on the top rod, and a driving belt is wound around the first belt pulley and the second belt pulley.

3. A monitoring method for monitoring root slope protection according to claim 1, characterized in that: The vertical mounting plate is provided with a through slot in the length direction, an operating rod is provided in the through slot, a mounting block is provided on one end of the telescopic rod connected to the U-shaped mounting frame, one end of the operating rod passes through the mounting block and is fixed on the U-shaped mounting frame, and the operating rod is rotatably connected to the mounting block.

4. A monitoring platform for monitoring root slope protection, used to implement a monitoring method for monitoring root slope protection in claim 1, characterized in that: It includes program design module, experimental simulation module, technical guidance and training module, resource docking and procurement module, information exchange and cooperation module and project monitoring and evaluation module; The scheme design module is used to provide users with root slope protection scheme design services; The experimental simulation module is used to perform simulation tests on root slope protection respectively; The technical guidance and training module is used to provide users with online courses, technical guidance and training services; The resource docking and procurement module is used to provide users with one-stop resource docking and procurement services related to root slope protection; The information exchange and cooperation module is used to establish a technical exchange and cooperation channel between users and industry experts; The project monitoring and evaluation module is used to monitor and evaluate the root slope protection project selected by the user.

5. A monitoring platform for monitoring root slope protection according to claim 4, characterized in that: When conducting root slope protection simulation tests through the experimental simulation module, discrete element software is used to simulate the effects of various root systems on the user's actual slope protection, and a comparison chart of the effects of various simulation tests is displayed to the user.

6. A monitoring platform for monitoring root slope protection according to claim 4, characterized in that: The experimental simulation module includes: Image processing unit: used to obtain the root fractal dimension of plant roots; Indoor triaxial test data acquisition unit: used to obtain data related to the shear strength of the root-soil complex due to different root contents and root fractal dimensions in the soil; PFC simulation test unit: used for simulation test of root soil, obtaining relevant strength parameters of root soil, and then obtaining the soil strength of root soil; Root-soil strength assessment unit: used to assess the impact of root fractal dimension on slope stability and establish a corresponding theoretical model.

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