Slope capillary resistance cover layer moisture migration inhibition structure based on crack propagation mechanism

Abstract

This invention discloses a slope capillary barrier capillary structure for inhibiting water migration based on the mechanism of crack propagation, relating to the field of slope water migration inhibition technology. It includes a first capillary layer, a second capillary layer, and a third capillary layer, as well as a substrate. The first, second, and third capillary layers are laid on top of the substrate. This invention utilizes a three-layer integrated barrier capillary system, forming a comprehensive barrier capillary system consisting of a fine-drainage layer and a coarse-grained capillary barrier capillary system. This multi-layered structure, through sequential layering, inhibits capillary water ascent, reduces the rate of infiltration and water migration, and improves waterproofing and moisture-proofing effects. Furthermore, in the fine-to-coarse layering, the fine layer controls capillary ascent, while the drainage layer provides channels for moisture or water discharge, maintaining internal moisture pressure within a safe range and thus reducing water pressure-induced damage.

Description

Technical Field

[0001] This invention relates to the field of slope moisture migration inhibition technology, specifically to a slope capillary barrier structure for inhibiting moisture migration in the cover layer based on the mechanism of crack propagation. Background Technology

[0002] Moisture migration in slope cover refers to the spatial movement and distribution of moisture within the cover layer. This concept is crucial in slope soil and water conservation, seepage prevention, and drainage design because moisture movement directly affects soil stability, seepage pressure, the formation of fissure wetting zones, and potential landslide risks. Water from external rainfall or the weight of the cover soil seeps downwards along the direction of gravity. In porous materials, water moves upwards or laterally through capillary forces within the pores, especially in areas with low moisture content. Furthermore, surface moisture in the cover layer evaporates and is transferred to the atmosphere, while the soil-water interface rebalances internally. Simultaneously, the soil moisture potential difference drives the horizontal or vertical movement of moisture within the cover layer. When suppressing slope moisture migration, a capillary-retaining cover layer is typically chosen to be placed on the slope.

[0003] A type of ecological restoration slope, patent publication number CN118668733A, features a drainage pipe that discharges rainwater during rainfall, facilitating rainwater diversion and collection. The staggered installation of two reinforcing frames allows rainwater to flow in multiple directions, preventing sedimentation and ensuring uniform drainage. The drainage pipe, located within the drainage pipe, reduces the space occupied by the slope itself. This dual-channel drainage system reduces the impact of water, ensuring soil stability and preventing cracking and stratification. An inclined guide plate installed at the top of the reinforcing frame prevents rainwater from impacting the top of the frame, directing it directly into the drainage pipe and protecting the vegetation within the frame. This design provides excellent protection.

[0004] When the above-mentioned and similar technical solutions use capillary blocking capillary layers to inhibit water migration, the fine soil layer has low permeability and will quickly become saturated in heavy rain conditions. At this time, the coarse gravel layer cannot drain the accumulated water in time, resulting in the accumulation of interfacial water pressure. When the interfacial water pressure exceeds the shear strength or other relevant thresholds of the fine soil layer, the fine soil layer may be ruptured, which will lead to the failure of the entire capillary structure and the loss of its original water migration inhibition function. Summary of the Invention

[0005] The purpose of this invention is to provide a slope capillary barrier structure for inhibiting water migration in the cover layer based on the crack propagation mechanism, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a slope capillary barrier cover layer moisture migration inhibition structure based on crack propagation mechanism, comprising a first cover layer, a second cover layer, a third cover layer, and a base, wherein the first cover layer, the second cover layer, and the third cover layer are laid on top of the base.

[0007] The third covering layer is a coarse gravel layer, which is covered on the substrate by a third covering method to obtain the third laying layer, which is used to provide structural support and accelerate gravity drainage;

[0008] The second cover layer is a drainage layer, which is laid on the third cover layer in a second laying method to form a second laying layer, which is used to construct a transverse drainage channel and eliminate the accumulation of pore water pressure at the bottom of the first cover layer;

[0009] The first cover layer is a fine soil layer, which is laid on top of the second cover layer by a first laying method to obtain the first laying layer, which blocks water infiltration through capillary blockage.

[0010] Furthermore, the fine soil layer includes a microbial mixed cover material, and the first covering method includes:

[0011] The microbial mixed covering material includes kaolin, sodium bentonite and hydrophobic microbial culture medium. A first ratio value is set, which is the proportion of materials added to the microbial mixed covering material. Based on the first ratio value, the added materials are mixed and prepared to obtain the microbial mixed covering material.

[0012] A first height value is set, which is the laying height of the microbial mixed covering material. The microbial mixed covering material is laid based on the first height value to obtain the microbial mixed covering layer.

[0013] Nutrients are sprayed onto the microbial mixed covering layer, and the culture temperature and culture time are set to cultivate the microbial mixed covering layer to generate a microbial network, thus obtaining the first laying layer.

[0014] Furthermore, the guide layer comprises a skeleton coating mixed material, and the second cover method includes:

[0015] The skeleton coating is a hybrid material consisting of a basalt skeleton and a graphene aerogel coating. The initial thickness of the skeleton is set, and the initial skeleton layer is obtained by melt extrusion based on basalt.

[0016] The initial framework layer is impregnated with a coating, and the impregnation pressure is set. Based on the impregnation pressure, the initial framework layer is immersed in a graphene suspension for static pressure determination to obtain a mixed framework layer.

[0017] A second height value is set, which is the laying height of the skeleton coating mixed material. The mixed skeleton layer is laid based on the second height value to obtain the second laying layer.

[0018] Furthermore, the coarse gravel layer comprises rubber granules, and the third covering method includes:

[0019] The rubber granule material includes waste tire crushed particles. A crushing value is set, which is the particle size value. The waste tires are crushed based on the crushing value to obtain a crushed mixture.

[0020] The adhesive is prepared by adding a broken adhesive layer based on the broken mixture. A third height value is set, which is the laying height of the rubber granule material. The height is divided based on the third height value, and divided into at least three height division items.

[0021] The height of the broken bonding layer is limited based on the height division term to obtain the broken butt joint layer. The broken butt joint layer is then laid based on the third height value to obtain the third laying layer.

[0022] Furthermore, the fine soil layer includes a diatomaceous earth mixed covering material, and the first covering method includes:

[0023] The diatomaceous earth mixed covering material includes powdery clay, diatomaceous earth and antifreeze heave agent, and antifreeze liquid adsorption pretreatment is carried out based on diatomaceous earth.

[0024] A second ratio value is set, which is the proportion of materials added to the diatomaceous earth mixed covering material. Based on the second ratio value, the added materials are mixed and prepared to obtain the diatomaceous earth mixed covering material.

[0025] Set a first update height value, which is the laying height of the diatomaceous earth mixed covering material. Lay the microbial mixed covering material based on the first update height value to obtain the first laying layer.

[0026] Furthermore, the conductive layer comprises a paraffin phase change material, and the second covering method includes:

[0027] The paraffin phase change material includes paraffin and expanded graphite. A third ratio value is set, which is the proportion of materials added to the paraffin phase change material. Based on the third ratio value, the added materials are obtained to obtain paraffin material and expanded graphite material.

[0028] The paraffin material is melted to obtain a paraffin melt, and the paraffin melt is mixed with expanded graphite material to obtain a phase change material mixture;

[0029] A second update height value is set, which is the height of the paraffin phase change material. The phase change material mixture is laid based on the second height value to obtain the second layer.

[0030] Furthermore, the coarse gravel layer comprises a mixture of ceramsite and other materials, and the third paving method includes:

[0031] The ceramsite mixture includes porous ceramsite and embedded stainless steel heat pipes. The ceramsite is prepared by setting the diameter data of the porous ceramsite, and the ceramsite material item is obtained. The diameter data, installation spacing data, lower layer data and upper layer data of the embedded stainless steel heat pipe are set, and the installation information item is obtained. The upper layer data is the ground penetration height data, and the lower layer data is the underground insertion data. Based on the installation information item.

[0032] The embedded stainless steel is installed based on the installation information item, and the material is filled based on the ceramsite material item to obtain the third laying layer.

[0033] Furthermore, the fine soil layer includes a vegetation-mixed cover material, and the first covering method includes:

[0034] The vegetation mixed cover material includes humus, vermiculite and conductive bacteria agent. A fourth ratio value is set, which is the proportion of materials added to the vegetation mixed cover material. Based on the fourth ratio value, the added materials are mixed to prepare the vegetation mixed cover material.

[0035] Set a first height value and a second update value. The first height value and the second update value are the laying height of the vegetation mixed cover material. The vegetation mixed cover material is laid based on the first height value and the second update value to obtain the vegetation mixed cover layer.

[0036] Nutrients are sprayed onto the microbial mixed cover layer, and a cultivation time is set to cultivate the vegetated mixed cover layer for generating a vegetated network, thus obtaining the first laying layer.

[0037] Furthermore, the guide layer comprises a carbon fiber mesh composite material, and the second cover method includes:

[0038] The carbon fiber mesh hybrid material includes carbon fiber mesh and biochar particles. The mesh spacing is set based on the carbon fiber mesh, and electrogenic bacteria are inoculated at the same time to obtain a mesh hybrid layer.

[0039] A second height value is set and updated. The second height value is the laying height of the carbon fiber mesh hybrid material. The mesh hybrid layer is laid based on the second height value and updated, and the second laying layer is obtained.

[0040] Compared with the prior art, the beneficial effects of the present invention are:

[0041] This slope capillary barrier capillary cover layer moisture migration inhibition structure based on the crack propagation mechanism consists of a three-layer integrated barrier capillary cover layer system. The integrated barrier capillary cover layer is divided into a fine-drainage layer-coarse three-layer capillary barrier capillary cover layer system. The multi-layer structure, through sequential layering design, can inhibit capillary water ascent, reduce the rate of infiltration and moisture migration, and improve waterproof and moisture-proof effects. In the layering from fine to coarse particles, the fine layer is responsible for controlling capillary ascent, while the drainage layer provides channels for moisture or water discharge, keeping the internal moisture pressure within a safe range, thereby reducing water pressure-induced damage.

[0042] Meanwhile, when comparing the graphene aerogel drainage layer with a conventional double-layer capillary barrier structure cover layer, using a fine soil layer with a microbial mixed cover material, a drainage layer with a skeleton coating mixed material, and a coarse gravel layer with rubber particles as a whole, the results showed that the graphene aerogel drainage layer maintained superhydrophobicity under extreme rainstorms, improved drainage efficiency, and effectively inhibited rainwater infiltration. When comparing the graphene aerogel drainage layer with a fine soil layer with a diatomaceous earth mixed cover material, a drainage layer with a paraffin phase change material, and a coarse gravel layer with a ceramic particle mixed material as a whole, the results showed that the drainage layer impounded the freezing front within the fine soil layer, reduced the freezing depth, decreased the frost heave force, and expanded in volume after the drainage layer melted, increasing the porosity and accelerating drainage. At the same time, the heat pipe conducted the deep ground temperature to the drainage layer, maintaining the interlayer temperature in winter, thus achieving a breakthrough in freezing depth control. Attached Figure Description

[0043] Figure 1 This is a schematic cross-sectional view of the overall structure of the present invention;

[0044] Figure 2 This is a schematic cross-sectional view of the hybrid skeleton layer structure of the present invention;

[0045] Figure 3 This is a schematic diagram of the stainless steel heat pipe installation structure of the present invention;

[0046] Figure 4 This is a schematic diagram showing the overall structure and base location of the present invention;

[0047] Figure 5 This is a schematic diagram of the construction process of the present invention.

[0048] In the diagram: 1. First cover layer; 2. Second cover layer; 3. Third cover layer; 4. Substrate. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and 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.

[0050] Capillary-retaining capillary layers typically consist of an upper layer of fine soil and a lower layer of coarse gravel. The fine soil layer has a high water-holding capacity and low permeability, effectively preventing water from evaporating upwards. The coarse gravel layer, on the other hand, has high permeability, facilitating drainage. Under normal circumstances, water in the fine soil layer migrates upwards through capillary action, evaporating upon reaching the capillary surface. Due to the low permeability of the fine soil layer, the rate of water migration is limited, and the soil beneath the capillary layer remains relatively dry. However, under heavy rainfall conditions, the situation changes significantly. Because the rainfall intensity far exceeds the permeability of the fine soil layer, it quickly becomes saturated. If the coarse gravel layer cannot drain the accumulated water in time, it leads to interfacial water pressure buildup. During heavy rainfall, precipitation... Rapid penetration into the fine soil layer leads to a rapid increase in the moisture content of the fine soil layer. Due to the low permeability of the fine soil layer, water cannot quickly penetrate downwards into the coarse gravel layer, resulting in a gradual accumulation of interfacial water pressure. The technical solution provided in this application uses a three-layer integrated barrier capillary system, which is composed of a fine-drainage layer and a coarse-grained three-layer capillary barrier capillary system. The multi-layer structure, through sequential layering design, can inhibit capillary water upward movement, reduce the rate of infiltration and water migration, and improve the waterproof and moisture-proof effect. Furthermore, in the stratification from fine to coarse particles, the fine layer is responsible for controlling capillary ascent, while the drainage layer provides a channel for the discharge of moisture or water, keeping the internal moisture pressure within a safe range, thereby reducing water pressure-induced damage.

[0051] like Figure 1 , Figure 4 and Figure 5 As shown, a slope capillary barrier cover layer moisture migration inhibition structure based on crack propagation mechanism includes a first cover layer 1, a second cover layer 2, and a third cover layer 3. Its features include: a base layer 4; the first cover layer 1, the second cover layer 2, and the third cover layer 3 are laid on top of the base layer 4; the third cover layer 3 is a coarse gravel layer, which is laid on the base layer 4 in a third covering manner to form a third laying layer, used to provide structural support and accelerate gravity drainage; the second cover layer 2 is a drainage layer, which is laid on the third cover layer 3 in a second covering manner to form a second laying layer, used to construct lateral drainage channels and eliminate pore water pressure accumulation at the bottom of the first cover layer 1; the first cover layer 1 is a fine soil layer, which is laid on the second cover layer 2 in a first covering manner to form a first laying layer, blocking water infiltration through capillary barrier.

[0052] It is important to note that the first capping layer 1, the second capping layer 2, and the third capping layer 3 are stacked to form a three-layer integrated barrier capping layer. Since the first capping layer 1 is a fine soil layer, the second capping layer 2 is a drainage layer, and the third capping layer 3 is a coarse gravel layer, the resulting integrated barrier capping layer is generally divided into a three-layer capillary barrier capping layer system consisting of a fine-drainage layer and a coarse layer. The multi-layer structure, through sequential layering design, can inhibit capillary water ascent, reduce the rate of infiltration and moisture migration, and improve waterproof and moisture-proof effects. Furthermore, in the stratification from fine to coarse particles, the fine layer is responsible for controlling capillary ascent, while the drainage layer provides channels for the discharge of moisture or water, keeping the internal moisture pressure within a safe range, thereby reducing water pressure-induced damage.

[0053] In Example 1, the fine soil layer includes a microbial mixed covering material. The first covering method includes: the microbial mixed covering material includes kaolin, sodium bentonite, and a hydrophobic microbial culture agent; a first ratio value is set, which is the proportion of materials added to the microbial mixed covering material; the added materials are mixed and prepared based on the first ratio value to obtain a microbial mixed covering material; a first height value is set, which is the laying height of the microbial mixed covering material; the microbial mixed covering material is laid based on the first height value to obtain a microbial mixed covering layer; a nutrient agent is sprayed on the microbial mixed covering layer; a culture temperature and culture time are set to cultivate the microbial mixed covering layer to generate a microbial network, thus obtaining a first laying layer.

[0054] Specifically, the first ratio is 6:3:1, with kaolin accounting for 60%, sodium bentonite accounting for 30%, and hydrophobic microbial culture agent accounting for 10%. The added materials are mixed to prepare a microbial mixed cover. The first height is set to 300 mm. The microbial mixed cover is laid based on the first height value, and a nutrient agent is sprayed at the same time. The nutrient agent is sucrose and ammonium nitrate, pH=6.5. The set culture temperature is 28℃ and the culture time is 72 h to generate a microbial network. Microorganisms induce calcium carbonate deposition to obtain the first layer.

[0055] It should be noted that the guide layer includes a skeleton coating mixture. The second layup method includes: the skeleton coating mixture includes a basalt skeleton and a graphene aerogel coating; the initial skeleton thickness is set; the basalt is melt-extruded to obtain an initial skeleton layer; the initial skeleton layer is impregnated with a coating; the impregnation pressure is set; the initial skeleton layer is immersed in a graphene suspension for static pressure determination based on the impregnation pressure to obtain a mixed skeleton layer; a second height value is set, which is the layup height of the skeleton coating mixture; the mixed skeleton layer is laid based on the second height value to obtain a second layup layer.

[0056] Specifically, such as Figure 2As shown, the initial skeleton thickness is set to 20 mm. Based on the initial skeleton thickness, basalt is melted and extruded, and then impregnated in graphene suspension. The impregnation pressure is set to 200 MPa to obtain a mixed skeleton layer. The second height value is set to 200 mm. Based on the second height value, the mixed skeleton layer is laid to obtain the second laying layer.

[0057] It should be noted that the coarse gravel layer includes rubber granules. The third laying method includes: the rubber granules include waste tire crushed particles; a crushing value is set, which is the particle size value; the waste tires are crushed based on the crushing value to obtain a crushed mixture; an adhesive is added to the crushed mixture to prepare a crushed adhesive layer; a third height value is set, which is the laying height of the rubber granules; the height is divided based on the third height value, into at least three height division items; the height of the crushed adhesive layer is limited based on the height division items to obtain a crushed butt joint layer; the crushed butt joint layer is laid based on the third height value to obtain the third laying layer.

[0058] Specifically, the crushing value is set to 20-50mm. Waste tires are crushed to obtain a crushed mixture, i.e. tire fragments. Adhesive is added to prepare a crushed adhesive layer. The third height value is set to 400mm. The third height value is divided into four height division items, each of which is 100mm. That is, the height of the crushed bonding layer is 100mm. The crushed bonding layer is laid based on the third height value to obtain the third laying layer.

[0059] In the specific implementation process, a fine soil layer composed of microbial mixed cover material, a drainage layer composed of skeleton coating mixed material, and a coarse gravel layer composed of rubber particles were used as the overall material, with a total thickness of 900 mm. Among them, the thickness of the fine soil layer was 300 mm, the thickness of the drainage layer was 200 mm, and the thickness of the coarse gravel layer was 400 mm. It was compared and verified with a conventional double-layer capillary retardant structure cover layer. A rainstorm environment with a rainfall of 150 mm / h for 6 hours was simulated on a 45° rock slope. The thicknesses of the conventional double-layer capillary retardant structure cover layer were 300 mm and 400 mm, respectively, which were the fine soil layer and the coarse gravel layer. The fine soil layer was made of conventional expansive soil material, and the coarse gravel layer was made of conventional crushed stone material. The verification results are shown in Table 1.

[0060] Table 1

[0061]

[0062] Key findings: The graphene aerogel drainage layer maintains superhydrophobicity under extreme rainstorms, improves drainage efficiency by 3 times, and effectively inhibits rainwater infiltration.

[0063] In Example 2, it should be noted that the fine soil layer includes a diatomaceous earth mixed covering material. The first covering method includes: the diatomaceous earth mixed covering material includes silty clay, diatomaceous earth, and an antifreeze heave agent; the diatomaceous earth is used for antifreeze adsorption pretreatment; a second ratio value is set, which is the proportion of materials added to the diatomaceous earth mixed covering material; the added materials are mixed and prepared based on the second ratio value to obtain the diatomaceous earth mixed covering material; a first renewal height value is set, which is the laying height of the diatomaceous earth mixed covering material; the microbial mixed covering material is laid based on the first renewal height value to obtain the first laying layer.

[0064] Specifically, the second ratio is set to 7:2.5:0.5, that is, 70% of the powdery clay, 25% of the diatomaceous earth, and 5% of the antifreeze agent. The diatomaceous earth is pretreated with antifreeze adsorption, and the added materials are mixed to prepare a diatomaceous mixed cover. The first renewal height is set to 250mm. Based on the first renewal height, the microbial mixed cover is laid to obtain the first layer, that is, a diatomaceous mixed cover material layer with a thickness of 250mm.

[0065] It should be noted that the guide layer includes a paraffin phase change material, and the second layup method includes: the paraffin phase change material includes paraffin and expanded graphite; a third ratio value is set, which is the proportion of materials added to the paraffin phase change material; the added materials are obtained based on the third ratio value to obtain paraffin material and expanded graphite material; the paraffin material is melted to obtain paraffin melt; the paraffin melt is mixed with expanded graphite material to obtain a phase change material mixture; a second update height value is set, which is the layup height of the paraffin phase change material; the phase change material mixture is laid based on the second height value to obtain the second layup layer.

[0066] Specifically, the third ratio is set to 6:4, that is, 60% paraffin material and 40% expanded graphite material. The paraffin material is melted to obtain a paraffin melt, and the paraffin melt is mixed with the expanded graphite material to obtain a phase change material mixture. The second renewal height is set to 150mm. The phase change material mixture is laid based on the second height value to obtain the second layup layer.

[0067] It should be noted that the coarse gravel layer includes a mixture of expanded clay aggregates. The third layering method includes: the expanded clay aggregate mixture includes porous expanded clay aggregates and embedded stainless steel heat pipes. The expanded clay aggregates are prepared by setting the diameter data of the porous expanded clay aggregates, resulting in the expanded clay aggregate material item. The embedded stainless steel heat pipe diameter data, installation spacing data, lower layer data, and upper layer data are set to obtain the installation information item. The upper layer data is the ground penetration height data, and the lower layer data is the underground insertion data, based on the installation information item. Based on the installation information item, the embedded stainless steel is installed, and at the same time, the expanded clay aggregate material is filled to obtain the third layer.

[0068] Specifically, such as Figure 3 As shown, the diameter of the porous ceramic granules is set to 15-30mm, the diameter of the embedded stainless steel heat pipe is set to 50mm, the installation spacing is 1.5m, the lower layer is 3m, and the upper layer is 350mm. The embedded stainless steel is installed, and the material is filled based on the ceramic granules to obtain the third layer.

[0069] In the specific implementation process, a fine soil layer composed of diatomaceous earth mixed covering material, a paraffin phase change material drainage layer, and a coarse gravel layer composed of ceramsite mixed material were used as the overall material, with a total thickness of 750 mm. The fine soil layer was 250 mm thick, the drainage layer was 150 mm thick, and the coarse gravel layer was 350 mm thick. This was compared and verified with a conventional double-layer capillary retardation structure covering layer. Freeze-thaw cycles were simulated: 12 hours at -20°C and 12 hours at +5°C, for 50 cycles. The thicknesses of the conventional double-layer capillary retardation structure covering layer were 250 mm and 350 mm, respectively, representing the fine soil layer and the coarse gravel layer. The fine soil layer was made of conventional expansive soil, and the coarse gravel layer was made of conventional crushed stone. The verification results are shown in Table 2.

[0070] Table 2

[0071]

[0072] Key findings: The drainage layer absorbs 180 J / g of cold energy at -10℃, trapping the freezing front within the fine soil layer. The measured freezing depth decreased from 1.2 m to 0.3 m, and the frost heave force decreased to 0.8 MPa. After the drainage layer thaws, its volume expands, increasing its porosity and accelerating drainage. At the same time, the heat pipes conduct deep ground temperature to the drainage layer, maintaining the interlayer temperature in winter, thus achieving a breakthrough in freezing depth control.

[0073] In Example 3, it should be noted that the fine soil layer includes a vegetated mixed cover material. The first covering method includes: the vegetated mixed cover material includes humus, vermiculite, and conductive microbial agent; a fourth ratio value is set, which is the proportion of materials added to the vegetated mixed cover material; the added materials are mixed and prepared based on the fourth ratio value to obtain the vegetated mixed cover; a first height value and a second update value are set, which is the laying height of the vegetated mixed cover material; the vegetated mixed cover is laid based on the first height value and the second update value to obtain the vegetated mixed cover layer; nutrients are sprayed on the microbial mixed cover layer, a cultivation time is set, and the vegetated mixed cover layer is cultivated to generate a vegetated network to obtain the first laying layer.

[0074] Specifically, the fourth ratio is set to 5:3:2, meaning humus accounts for 50%, vermiculite for 30%, and conductive bacteria agent for 20%. The added materials are mixed based on this fourth ratio to obtain a vegetated mixed cover. The first height and second update value are set to 200mm. The vegetated mixed cover is laid based on this first height and second update value to obtain a vegetated mixed cover layer. Nutrients are sprayed onto the microbial mixed cover layer; the nutrient is sodium acetate nutrient solution, 0.1mol / L, and the cultivation time is set to 14 days to cultivate the vegetated mixed cover layer, which is used to generate a vegetated network, resulting in the first laying layer.

[0075] It should be noted that the guide layer includes a carbon fiber mesh mixed material. The second laying method includes: the carbon fiber mesh mixed material includes carbon fiber mesh and biochar particles. The mesh spacing is set based on the carbon fiber mesh, and electrogenic bacteria are inoculated at the same time to obtain the mesh mixed layer; a second height value is set and the second height value is the laying height of the carbon fiber mesh mixed material. The mesh mixed layer is laid based on the second height value and the second height value is the second update value to obtain the second laying layer.

[0076] Specifically, the grid spacing is set to 10mm, electrogenic bacteria are inoculated to form a bioanode layer, biochar particles with a particle size of 2-5mm are filled in the grid spacing, the second height value is set to 100mm, and the grid mixture layer is laid to obtain the second laying layer.

[0077] In the specific implementation process, a composite material consisting of a fine soil layer made of vegetation-mixed cover, a drainage layer made of carbon fiber mesh mixed material, and a coarse gravel layer made of expanded clay mixed material was used as the overall material, with a total thickness of 700 mm. The fine soil layer was 200 mm thick, the drainage layer was 100 mm thick, and the coarse gravel layer was 400 mm thick. This was compared and verified with a conventional double-layer capillary retardant cover layer. Under simulated rainfall conditions, the conventional double-layer capillary retardant cover layer had thicknesses of 200 mm and 400 mm, representing the fine soil layer and the coarse gravel layer, respectively. The fine soil layer was made of conventional expansive soil, and the coarse gravel layer was made of conventional crushed stone. The verification results are shown in Table 3.

[0078] Table 3

[0079]

[0080] Key findings: Plant transpiration generates root potential, driving water molecules to migrate towards the electrodes. The bioelectrical conductivity layer, through the microbial fuel cell effect, increases the drainage rate by 200%, and the self-healing rate of cracks reaches 98%.

[0081] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended embodiments and their equivalents.

Claims

1. A slope capillary barrier structure for inhibiting water migration in the cover layer based on the mechanism of crack propagation, comprising a first cover layer (1), a second cover layer (2), and a third cover layer (3), characterized in that: It also includes a base (4), a first cover layer (1), a second cover layer (2), and a third cover layer (3) laid on top of the base (4); The third covering layer (3) is a coarse gravel layer, which is covered on the base (4) by a third covering method to obtain a third laying layer, which is used to provide structural support and accelerate gravity drainage; The second cover layer (2) is a drainage layer, which is covered on the third cover layer (3) by the second laying method to obtain the second laying layer, which is used to construct a transverse drainage channel and eliminate the accumulation of pore water pressure at the bottom of the first cover layer (1); The first covering layer (1) is a fine soil layer, which is covered on the second covering layer (2) by the first covering method to obtain the first laying layer, which blocks water infiltration by capillary blockage; The slope capillary barrier cover layer moisture migration inhibition structure includes three combinations, the first combination being: The fine soil layer includes a microbial mixed cover material, and the first covering method includes: The microbial mixed covering material includes kaolin, sodium bentonite and hydrophobic microbial culture medium. A first ratio value is set, which is the proportion of materials added to the microbial mixed covering material. Based on the first ratio value, the added materials are mixed and prepared to obtain the microbial mixed covering material. A first height value is set, which is the laying height of the microbial mixed covering material. The microbial mixed covering material is laid based on the first height value to obtain the microbial mixed covering layer. Nutrients are sprayed onto the microbial mixed cover layer, and the culture temperature and culture time are set to cultivate the microbial mixed cover layer to generate a microbial network, thus obtaining the first laying layer. The guide layer comprises a skeleton coating mixed material, and the second covering method includes: The skeleton coating is a hybrid material consisting of a basalt skeleton and a graphene aerogel coating. The initial thickness of the skeleton is set, and the initial skeleton layer is obtained by melt extrusion based on basalt. The initial framework layer is impregnated with a coating, and the impregnation pressure is set. Based on the impregnation pressure, the initial framework layer is immersed in a graphene suspension for static pressure determination to obtain a mixed framework layer. A second height value is set, which is the laying height of the skeleton coating mixed material. The mixed skeleton layer is laid based on the second height value to obtain the second laying layer. The coarse gravel layer includes rubber granules, and the third covering method includes: The rubber granule material includes waste tire crushed particles. A crushing value is set, which is the particle size value. The waste tires are crushed based on the crushing value to obtain a crushed mixture. The adhesive is prepared by adding a broken adhesive layer based on the broken mixture. A third height value is set, which is the laying height of the rubber granule material. The height is divided based on the third height value, and divided into at least three height division items. The height of the broken bonding layer is limited based on the height division term to obtain the broken butt joint layer. The broken butt joint layer is then laid based on the third height value to obtain the third laying layer.

2. The slope capillary barrier structure for inhibiting water migration in the cover layer based on the crack propagation mechanism according to claim 1, characterized in that: The second combination method is: The fine soil layer includes a diatomaceous earth mixed covering material, and the first covering method includes: The diatomaceous earth mixed covering material includes powdery clay, diatomaceous earth and antifreeze heave agent, and antifreeze liquid adsorption pretreatment is carried out based on diatomaceous earth. A second ratio value is set, which is the proportion of materials added to the diatomaceous earth mixed covering material. Based on the second ratio value, the added materials are mixed and prepared to obtain the diatomaceous earth mixed covering material. Set a first update height value, which is the laying height of the diatomaceous earth mixed covering material. Lay the microbial mixed covering material based on the first update height value to obtain the first laying layer. The conductive layer comprises a paraffin phase change material, and the second covering method includes: The paraffin phase change material includes paraffin and expanded graphite. A third ratio value is set, which is the proportion of materials added to the paraffin phase change material. Based on the third ratio value, the added materials are obtained to obtain paraffin material and expanded graphite material. The paraffin material is melted to obtain a paraffin melt, and the paraffin melt is mixed with expanded graphite material to obtain a phase change material mixture; A second update height value is set, which is the height of the paraffin phase change material. Based on the second height value, the phase change material mixture is laid to obtain the second layer. The coarse gravel layer includes a mixture of expanded clay aggregates, and the third covering method includes: The ceramsite mixture includes porous ceramsite and embedded stainless steel heat pipes. The ceramsite is prepared by setting the diameter data of the porous ceramsite, and the ceramsite material item is obtained. The diameter data, installation spacing data, lower layer data and upper layer data of the embedded stainless steel heat pipe are set, and the installation information item is obtained. The upper layer data is the ground penetration height data, and the lower layer data is the underground insertion data. Based on the installation information item. The embedded stainless steel is installed based on the installation information item, and the material is filled based on the ceramsite material item to obtain the third laying layer.

3. The slope capillary barrier structure for inhibiting water migration in the cover layer based on the crack propagation mechanism according to claim 1, characterized in that: The third combination method is: The fine soil layer includes a vegetation-mixed cover material, and the first covering method includes: The vegetation mixed cover material includes humus, vermiculite and conductive bacteria agent. A fourth ratio value is set, which is the proportion of materials added to the vegetation mixed cover material. Based on the fourth ratio value, the added materials are mixed to prepare the vegetation mixed cover material. Set a first height value and a second update value. The first height value and the second update value are the laying height of the vegetation mixed cover material. The vegetation mixed cover material is laid based on the first height value and the second update value to obtain the vegetation mixed cover layer. Nutrients are sprayed onto the microbial mixed cover layer, and a cultivation time is set to cultivate the vegetated mixed cover layer to generate a vegetated network, thus obtaining the first laying layer. The guide layer comprises a carbon fiber mesh composite material, and the second cover method includes: The carbon fiber mesh hybrid material includes carbon fiber mesh and biochar particles. The mesh spacing is set based on the carbon fiber mesh, and electrogenic bacteria are inoculated at the same time to obtain a mesh hybrid layer. A second height value and a second update value are set. The second height value and the second update value are the laying height of the carbon fiber mesh hybrid material. The mesh hybrid layer is laid based on the second height value and the second update value to obtain the second laying layer. The coarse gravel layer comprises a mixture of ceramic aggregates.

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