A kind of antifreeze slope consolidation ecological substrate and preparation method thereof

Abstract

The present invention discloses an antifreeze slope consolidation ecological substrate and its preparation method. First, clay is dried, ground, and screened for standby use. Then, polyethylene wax is added to an organic solvent to obtain a modifier. Then, vegetable oil is added to nano zinc oxide, placed in a grinding jar for manual grinding, the prepared modifier and deionized water are added, and after ultrasonic treatment, the substrate is placed in an autoclave. After the reaction is completed, the substrate is cooled and placed in a drying oven for drying to obtain modified nano zinc oxide. A soil curing agent is added to the prepared standby clay, followed by water, and the mixture is stirred evenly for the first time. Then, modified nano zinc oxide, thermal conductive fiber, and soil improver are added in sequence and stirred evenly again to obtain an antifreeze slope consolidation ecological substrate. The present invention reduces the free water content in the clay through modified nano zinc oxide, thereby achieving the purpose of antifreeze. At the same time, the modified nano zinc oxide can enhance the peroxidation reaction of the plant body, promote plant growth, increase the anchoring effect of the root system on the slope, and improve the stability of the ecological slope.

Description

Technical Field

[0001] The present invention belongs to the field of slope engineering, relates to a slope base material preparation technology, and specifically relates to an anti-frost heave slope consolidation ecological base material and a preparation method thereof, which is widely used in slope ecological protection. Background Art

[0002] Ecological slopes are protected and reinforced by the interaction between plants and rock, soil or clay (root anchoring). High latitudes and mid-latitudes near high latitudes experience long periods of low temperatures and dry, cold weather. Plants not only face frost damage, but also face soil erosion caused by rain and snow erosion, as well as water shortages or lack of nutrients. Mild frost damage only damages some cells or some young leaves, and the plants can still resume growth. However, severe frost damage will lead to necrosis of the plant roots, such as dehydration of the plant roots and freezing of the root protoplasm layer. The plant roots cannot play an anchoring role on the slope, and the requirements of ecological slope protection cannot be met. The existing technology achieves the effect of anti-freeze and anti-seepage by making a slope protection structure, setting a protective structural layer, and planting plants in the structural layer of the protective skeleton. This method is not only troublesome to make, but once the water storage layer inside the skeleton freezes, the plant roots will still lack water and freeze to death, and will not play the role of ecological slope reinforcement. Sowing requires reinstalling the skeleton, which consumes manpower and material resources and is difficult to promote on a large scale. Therefore, there is an urgent need for an anti-freeze slope technology suitable for cold environments to solve the problem of ecological slope reinforcement. Summary of the Invention

[0003] The existing technology is aimed at preventing slope plants from freezing and dying at low temperatures, which not only fails to beautify the environment but also causes soil erosion and even landslides. The present invention provides an anti-freeze slope consolidation ecological substrate and a preparation method thereof, which can increase the strength of slope soil, reduce soil frost, and promote plant root growth. The ecological substrate prepared by the present invention can ensure that the strength meets the requirements for ecological slope protection, reduce soil erosion, lower the freezing point and frost heave of the soil, and promote the growth of slope plant roots, enhance the root anchoring effect of the slope, and enhance slope stability.

[0004] In order to achieve the above objectives, this experiment adopts the following technical solutions:

[0005] A method for preparing an antifreeze slope consolidation ecological substrate comprises the following steps:

[0006] Step 1: Place clay in a drying oven, dry it, grind it, and screen it for later use;

[0007] Step 2: Add polyethylene wax to an organic solvent and stir thoroughly with a magnetic stirrer. After stirring, place the mixture in a water bath for heating until the polyethylene wax is completely dissolved and cool to room temperature to obtain a modifier.

[0008] Step 3: Add vegetable oil to nano zinc oxide, place it in a grinding jar and grind it manually, add an appropriate amount of the modifier prepared in step 2 and deionized water, ultrasonically treat it, place it in a high-pressure reactor, cool it after the reaction is completed, and place it in a drying oven to dry it to obtain modified nano zinc oxide;

[0009] Step 4: Add soil solidifier to the clay obtained in step 1, then add water, and stir evenly for the first time; then add modified nano zinc oxide, thermal conductive fiber, and soil improver in sequence and stir evenly again to obtain an anti-frost heave slope consolidation ecological substrate.

[0010] As a preferred technical solution, in step 1, the clay is taken from river silt, the oven temperature is set to 70-80°C, and the drying time is 10-30 minutes; and clay with a particle size of 2-4 mm is screened out.

[0011] Further preferably, in step 1, the drying time is 20 min; and the sieve used for screening is 100 mesh.

[0012] As a preferred technical solution, in step 2, the organic solvent is a non-polar organic solvent, including aromatic hydrocarbons, halogenated hydrocarbons and naphthalene-based organic solvents.

[0013] More preferably, the organic solvent is any one of turpentine, toluene, dichloroethane and tetralin.

[0014] When the organic solvent is turpentine, during the dissolution process, the amount of polyethylene wax added is 10%-15% of the mass of the organic solvent, the stirring rate of the magnetic stirrer is 60-80 r / min, and the stirring is carried out for 3-10 minutes; the water bath temperature is controlled at 60°C-70°C, and the water bath is stopped when the polyethylene wax is completely dissolved.

[0015] As a preferred technical solution, in step 3, the vegetable oil is any one of peanut oil, soybean oil, and corn oil. Vegetable oil can increase the lubricity of nano-zinc oxide, thereby improving the effect of nano-zinc oxide in modifying soil.

[0016] Further preferably, in step 3, the purity of the nano zinc oxide is 95%, and the amount of the modifier added is 10%-15% of the mass of the nano zinc oxide; during the modification process, the temperature of the high-pressure reactor is controlled at 120-130°C; and the oven temperature is set at 70-80°C.

[0017] Further preferably, in step 3, the mass ratio of nano zinc oxide to deionized water is 1:10; during the modification process, the product is first manually ground for 4-8 minutes, then the modifier and deionized water are added and ultrasonically treated with an ultrasonic machine for 10-40 minutes, and then placed in a high-pressure reactor for hydrothermal reaction, the temperature of the high-pressure reactor is controlled at 120°C-130°C, the hydrothermal reaction is carried out for 40-80 minutes, and after the reaction is completed, it is cooled and allowed to stand for a period of time (4-9 hours); finally, the product is dried, the oven temperature is set to 70-80°C, and the drying time is 30-50 minutes.

[0018] As a preferred technical solution, in step 4, the soil solidifier includes lime cement inorganic solidifier, slag dry powder soil solidifier, high-polymer ion soil solidifier, organic enzyme protein soil solidifier and organic-inorganic combined solidifier; the thermal conductive fiber is carbon fiber.

[0019] Further preferably, the carbon fiber is 2 mm grade chopped carbon fiber.

[0020] Further preferably, in step 4, the mass ratio of the modified nano zinc oxide to the clay is no more than 6%.

[0021] Further preferably, in step 4, the mass ratio of clay, modified nano zinc oxide, water, thermal conductive fiber, soil curing agent, and soil improver is: 1:(0-0.06):(0.25-0.35):(0.01-0.05):(0.05-0.15):(0.01-0.05).

[0022] The component ratio range of the modified nano zinc oxide does not include the endpoint 0.

[0023] Further preferably, in step 4, the optimal mass ratio of modified nano zinc oxide to clay is 1:0.045; the clay is mechanically stirred, the first mechanical stirring rate is 110-125r / min, the second mechanical stirring rate is 80-90r / min, and the stirring time is 8-10min.

[0024] The present invention also provides an antifreeze slope consolidation ecological substrate, which is prepared by any one of the above-mentioned preparation methods.

[0025] Compared with the prior art, the present invention has the following advantages and effects.

[0026] The present invention uses polyethylene wax to modify nano zinc oxide, giving full play to the large specific surface area, easy aggregation and extremely high chemical activity of nano zinc oxide. After mixing with clay, the nano zinc oxide promotes the aggregation of the clay into agglomerates. Part of the free water in the clay is confined in the pores of the aggregates, reducing the free water content in the clay, increasing the cohesion between soil particles, significantly improving the unconfined compressive strength of the clay, and reducing soil and water loss on the slope.

[0027] The free water confined in the pores of the aggregate is difficult to freeze. Even if the winter in the north is long, dry and rainy, the water in the pores not only avoids freezing but also provides water to the plant roots. The freezing of the free water outside the aggregate can release heat, which can maintain the temperature of the soil. Adding an appropriate amount of chopped carbon fiber to the soil will increase the heat transfer efficiency and reduce heat loss, thereby lowering the freezing point and frost heave deformation of the soil, and significantly improving the survival rate of slope plants in low temperature and dry environments.

[0028] Modified nano zinc oxide can interact with plant roots, enhance the peroxidation reaction of plants, increase the free radical content in plants, stimulate various physiological functions of plants, increase the root system's absorption of nutrients, promote plant growth, increase the root system's anchoring effect on the slope, and improve the stability of ecological slopes.

[0029] The method of the present invention can not only reduce the amount of chemical fertilizers used but also reduce labor maintenance costs, is simple to prepare, and is suitable for large-scale promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of the unconfined compressive strength of antifreeze slope consolidation ecological substrates with different mass ratios of nano-zinc oxide;

[0031] Figure 2 Schematic diagram of the freezing point of antifreeze slope consolidation ecological substrates with different mass ratios of nano zinc oxide;

[0032] Figure 3 Schematic diagram of the maximum frost heave deformation of antifreeze slope consolidation ecological substrates with different mass ratios of nano zinc oxide;

[0033] Figure 4 Schematic diagram of the implementation of anti-freeze and slope consolidation ecological substrate.

[0034] Figure numerals: 1-slope protection plants, 2-antifreeze slope consolidation ecological substrate, 3-pore water. DETAILED DESCRIPTION

[0035] The technical solution of the present invention will be further described in detail below with reference to specific comparative examples. It should be understood that the purpose of the comparative examples is to further illustrate the content of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any sense.

[0036] In the following examples, the raw soil was taken from slope soil, the vegetable oil was soybean oil, nano-zinc oxide was provided by Shanghai Changxin Zinc Industry Co., Ltd. with a purity of 95%, the soil solidifier was epoxy resin, the soil improver was provided by Hongcheng Road and Bridge as a slope greening water-retaining agent, the organic solvent was turpentine, the carbon fiber used was 2mm-grade chopped carbon fiber, the water bath was heated in a constant-temperature water bath, the ultrasonic treatment was performed using an ultrasonic machine, the reactor used a double-layer glass reactor, the solution was stirred using a brushless motor magnetic stirrer, the clay was stirred mechanically, the strength was determined by an unconfined compression test, and the isotropic freezing test was conducted using a Xiaomi BC-203MDM freezer. Temperature changes and frost heave deformation were detected using temperature sensors and displacement sensors, respectively. The root system was weighed using an electronic scale.

[0037] Example 1: An antifreeze slope consolidation ecological substrate is obtained by the following preparation method:

[0038] (1) Take the slope mud soil, place it in a drying oven and dry it for 20 minutes. The oven temperature is set to 70°C. Grind it manually at a speed of about 200 times per minute for 5 minutes. Then pass it through a 100-mesh sieve to screen out 1000g of clay with a particle size of 2-4mm.

[0039] (2) Weigh 5 g of polyethylene wax and add it to 50 g of turpentine. Use a magnetic stirrer to stir at a rate of 75 r / min for 5 minutes. Pour the stirred solution into a water bath and heat it in a water bath at 70°C. When the polyethylene wax is completely dissolved in the turpentine, stop the water bath, cool it naturally at room temperature, and let it stand for 4 hours to obtain a modifier.

[0040] (3) Weigh 0.2 g of soybean oil and add it to 15 g of nano zinc oxide, place it in a grinding jar and grind it manually at about 200 times per minute for 5 minutes, weigh 3 g of the modifier prepared in step (2), 150 g of deionized water and the ground nano zinc oxide and place them in an ultrasonic reactor, the time is set to 25 minutes, and after ultrasonic treatment, place it in a high-pressure reactor, set the temperature to 120°C, hydrothermally react for 60 minutes, cool naturally and stand for 7 hours, then place it in a drying oven, set the temperature to 80°C, and take it out after 30 minutes to obtain modified nano zinc oxide.

[0041] (4) Add 10 g of soil solidifier and 250 g of distilled water to the clay obtained in step (1), and mechanically stir for the first time at a stirring speed of about 120 r / min for 5 min. Then, add 15 g of modified nano zinc oxide, 50 g of carbon fiber and 15 g of soil improver obtained in step (3) into the mechanical stirrer in sequence at a stirring speed of about 90 r / min for 10 min. After stirring, a nano zinc oxide antifreeze slope solidification ecological substrate with a mass ratio of 1.5% is obtained.

[0042] Example 2: An antifreeze slope consolidation ecological substrate is obtained by the following preparation method:

[0043] (1) Take the slope mud soil, place it in a drying oven and dry it for 20 minutes. The oven temperature is set to 70°C. Grind it manually at a speed of about 200 times per minute for 5 minutes. Then pass it through a 100-mesh sieve and select 1000g of clay with a particle size of 2-4mm.

[0044] (2) Weigh 5 g of polyethylene wax and add it to 50 g of turpentine. Use a magnetic stirrer to stir at a rate of 75 r / min for 5 minutes. Pour the stirred solution into a water bath and heat it in a water bath at 70°C. When the polyethylene wax is completely dissolved in the turpentine, stop the water bath, cool it naturally at room temperature, and let it stand for 4 hours to obtain a modifier.

[0045] (3) Weigh 0.2 g of soybean oil and add it to 30 g of nano zinc oxide, place it in a grinding jar and grind it manually, about 200 times per minute, and control the grinding time to 5 minutes. Weigh 3 g of the modifier prepared in step (2), 300 g of deionized water and the ground nano zinc oxide are placed in an ultrasonic reactor together, and the time is set to 25 minutes. After ultrasonic treatment, place it in a high-pressure reactor, set the temperature to 120°C, hydrothermally react for 60 minutes, cool naturally and stand for 7 hours, then place it in a drying oven, set the temperature to 80°C, and take it out after 30 minutes to obtain modified nano zinc oxide.

[0046] (4) 10 g of soil solidifier and 250 g of distilled water were added to the clay obtained in step (1), and mechanical stirring was performed for the first time at a stirring speed of about 120 r / min and a stirring time of 5 min. 30 g of modified nano zinc oxide, 50 g of carbon fiber and 15 g of soil improver obtained in step (3) were added to the mechanical stirrer in sequence at a stirring speed of about 90 r / min and a stirring time of 10 min. After stirring, a nano zinc oxide antifreeze slope solidification ecological substrate with a mass ratio of 3% was obtained.

[0047] Example 3: An antifreeze slope consolidation ecological substrate is obtained by the following preparation method:

[0048] (1) Take the slope mud soil, place it in a drying oven and dry it for 20 minutes. The oven temperature is set to 70°C. Grind it manually at a speed of about 200 times per minute for 5 minutes. Then pass it through a 100-mesh sieve and select 1000g of clay with a particle size of 2-4mm.

[0049] (2) Weigh 5 g of polyethylene wax and add it to 50 g of turpentine. Use a magnetic stirrer to stir at a rate of 50-75 r / min for 5 minutes. Pour the stirred solution into a water bath and heat it in a water bath at 70°C. When the polyethylene wax is completely dissolved in the turpentine, stop the water bath, cool it naturally at room temperature, and let it stand for 4 hours to obtain a modifier.

[0050] (3) Weigh 0.2 g of soybean oil and add it to 45 g of nano zinc oxide, place it in a grinding jar and grind it manually, about 200 times per minute, and control the grinding time to 5 minutes. Weigh 3 g of the modifier prepared in step (2), 450 g of deionized water and the ground nano zinc oxide are placed in an ultrasonic reactor, the time is set to 25 minutes, and after ultrasonic treatment, place it in a high-pressure reactor, set the temperature to 120°C, hydrothermally react for 60 minutes, cool naturally and stand for 7 hours, then place it in a drying oven, set the temperature to 80°C, and take it out after 30 minutes to obtain modified nano zinc oxide.

[0051] (4) 10 g of soil solidifier and 250 g of distilled water were added to the clay obtained in step (1), and mechanical stirring was performed for the first time at a stirring speed of about 120 r / min and a stirring time of 5 min. 45 g of modified nano zinc oxide, 50 g of carbon fiber and 15 g of soil improver obtained in step (3) were added to the mechanical stirrer in sequence at a stirring speed of about 90 r / min and a stirring time of 10 min. After stirring, a nano zinc oxide antifreeze slope solidification ecological substrate with a mass ratio of 4.5% was obtained.

[0052] Example 4: An antifreeze slope consolidation ecological substrate is obtained by the following preparation method:

[0053] (1) Take the slope mud soil, place it in a drying oven and dry it for 20 minutes. The oven temperature is set to 70°C. Grind it manually at a speed of about 200 times per minute for 5 minutes. Then pass it through a 100-mesh sieve and select 1000g of clay with a particle size of 2-4mm.

[0054] (2) Weigh 5 g of polyethylene wax and add it to 50 g of turpentine. Use a magnetic stirrer to stir at a rate of 50-75 r / min for 5 minutes. Pour the stirred solution into a water bath and heat it in a water bath at 70°C. When the polyethylene wax is completely dissolved in the turpentine, stop the water bath, cool it naturally at room temperature, and let it stand for 4 hours to obtain a modifier.

[0055] (3) Weigh 0.2 g of soybean oil and add it to 60 g of nano zinc oxide, place it in a grinding jar and grind it manually, about 200 times per minute, and control the grinding time to 5 minutes. Weigh 3 g of the modifier prepared in step (2), 600 g of deionized water and the ground nano zinc oxide are placed in an ultrasonic reactor together, and the time is set to 25 minutes. After ultrasonic treatment, place it in a high-pressure reactor, set the temperature to 120°C, hydrothermally react for 60 minutes, cool naturally and stand for 7 hours, then place it in a drying oven, set the temperature to 80°C, and take it out after 30 minutes to obtain modified nano zinc oxide.

[0056] (4) Add 10 g of soil solidifier and 250 g of distilled water to the clay obtained in step (1), and mechanically stir for the first time at a stirring speed of about 120 r / min for 5 min. Then, add 60 g of modified nano zinc oxide, 50 g of carbon fiber and 15 g of soil improver obtained in step (3) into the mechanical stirrer in sequence at a stirring speed of about 90 r / min for 10 min. After stirring, a nano zinc oxide antifreeze slope solidification ecological substrate with a mass ratio of 6% is obtained.

[0057] Comparative Example 5

[0058] The same method as in Example 1 was adopted, but nano zinc oxide was not added, and a blank control group was used.

[0059] The results of the experimental detection method are as follows:

[0060] 1. Unconfined compressive strength test

[0061] The antifreeze slope consolidation ecological base materials prepared in Examples 1-4 and Comparative Example 5 were used for slope construction (each material was used to construct one area). Figure 4 As shown; 100g of clay from the slopes prepared in Examples 1-4 and Comparative Example 5 at the same height on the slopes was dug out respectively, the soil was compacted in three layers, each layer was compacted 29 times, and placed in a sample preparation device (with a diameter of 39.1mm and a height of 80mm) to obtain clay samples; the obtained clay samples were wrapped with plastic film and placed in a standard curing box for curing, the curing temperature was controlled at (18±2)℃, the relative humidity was controlled at above 90%, and after 14 days of natural curing, the samples were demoulded and subjected to a non-confined compressive strength test. The unconfined compressive strengths corresponding to the mass ratios of nano zinc oxide of 0%, 1.5%, 3%, 4.5%, and 6% were 198.42kPa, 225.36kPa, 361.22kPa, 441.51kPa, and 416.81kPa, respectively. Figure 1 The strength values ​​all meet the design requirements for ecological slope consolidation.

[0062] Clay cracks with a 0% nano-zinc oxide mass percentage exhibited irregular cracking. Clay cracks with a 1.5% nano-zinc oxide mass percentage developed almost vertically, while those with a 4.5% mass percentage developed diagonally. Clay cracks with a 6% nano-zinc oxide mass percentage began to develop through-cracks. When the nano-zinc oxide mass percentage exceeded 4.5%, the clay's toughness decreased, primarily due to strength differences among clays with varying nano-zinc oxide content. As the nano-zinc oxide content increased, the unconfined compressive strength first increased, then slowly reached a maximum value, before finally decreasing. The maximum unconfined compressive strength corresponded to an optimal modified nano-zinc oxide mass percentage of 4.5%. This demonstrates that this antifreeze ecological slope substrate can significantly improve the unconfined compressive strength of slope soil, reduce soil erosion, and enhance slope consolidation.

[0063] 2. Isotropic Freezing Experiment

[0064] 2000g of clay from the slopes prepared in Examples 1-4 and Comparative Example 5 was collected at the same height on the slope. The clay was then compacted into five cylindrical PVC drums with a diameter of 20cm, using varying weight ratios of 0.0%, 1.5%, 3.0%, 4.5%, and 6% nano-zinc oxide, to form soil samples at a target height of 20cm. A thin plastic film was then placed on top of the five compacted soil samples to prevent evaporation of the internal water during freeze-thaw cycles. The five cylindrical PVC drums containing the soil were then placed in the center of a freeze-thaw cabinet. During the experiments, both rapid cooling and step cooling were employed. Prior to cooling, the temperature was set at 24°C to maintain a humidity level above 90%. According to my country's winter weather conditions, the minimum soil temperature used in this experiment is close to -20℃. For the rapid cooling method, the ambient temperature in the freeze-thaw cabinet is first directly reduced to -20℃. For the gradual cooling method, the freezer is opened to gradually reduce the ambient temperature to -20℃. The temperature change and frost heave deformation of the clay are recorded using a thermometer and a displacement meter, respectively.

[0065] During rapid cooling, Figure 2 The freezing point of the clay with a 0% nano-zinc oxide mass ratio is -0.20°C, while the freezing points of the clay with 1.5%, 3.0%, 4.5%, and 6% mass ratios are -1.40°C, -1.95°C, 2.10°C, and -1.78°C, respectively. It is clear that the addition of nano-zinc oxide significantly lowers the freezing point. As the mass percentage of nano-zinc oxide increases, the freezing point of the clay decreases tenfold. During the gradual cooling process, the freezing point of the clay with a 0% nano-zinc oxide mass ratio is -0.10°C, while the freezing points of the clay with 1.5%, 3.0%, 4.5%, and 6% mass ratios are -1.40°C, -1.55°C, -1.60°C, and -1.47°C, respectively.

[0066] During rapid cooling, Figure 3As shown, the maximum frost heave deformations of clays containing 0.0%, 1.5%, 3.0%, 4.5%, and 6% nano-zinc oxide were 6.39 mm, 3.99 mm, 3.83 mm, 1.79 mm, and 3.25 mm, respectively. The maximum frost heave deformations during the gradual cooling process were 4.5 mm, 2.66 mm, 2.61 mm, and 2.97 mm, respectively. Clays containing 4.5% nano-zinc oxide showed the greatest effect in reducing frost heave. Compared with clays containing 0.0% nano-zinc oxide, the 4.5% nano-zinc oxide reduced frost heave deformation by 71.98% during rapid cooling and by 78.4% during gradual cooling. The addition of nano-zinc oxide altered the frost heave sensitivity of clays. This demonstrates that this anti-freeze ecological slope protection substrate can effectively lower the freezing point of clays during both cooling processes, reduce soil frost heave deformation, protect the protoplasm layer of plant roots, and enhance slope consolidation.

[0067] 3. Slope plant growth experiment

[0068] The antifreeze and slope consolidation ecological substrate prepared by Examples 1-4 and Comparative Example 5 was used. Five 50 cm × 50 × 5 cm block areas at the same height were selected to prepare the antifreeze and slope consolidation ecological substrate according to the proportion of the case. White lime powder was used to mark the square area. 100 clover seeds were evenly sown in the five areas. After 7 days, the seeds germinated and the number of seeds germinated in the five areas was recorded. The mass ratio of nano zinc oxide in the substrate was 0%, 1.5%, 3%, 4.5%, and 6%, and the germination numbers were: 20, 24, 28, 35, and 26 respectively; the growth rate after 30 days was monitored. In the long-term, the average heights of slope plants grown in substrates with nano-zinc oxide mass ratios of 0%, 1.5%, 3%, 4.5%, and 6% were 3.14cm, 3.92cm, 4.42cm, 6.86cm, and 5.24cm, respectively. The roots of normally growing plants were excavated and their weights were measured using a scale in five locations. The average root weights for the five areas with nano-zinc oxide mass ratios of 0%, 1.5%, 3%, 4.5%, and 6% were 1.12g, 1.94g, 2.76g, 3.2g, and 2.58g, respectively. This demonstrates that the anti-freeze ecological slope substrate promotes the growth of slope plant roots, strengthens the root anchoring effect on the slope, and enhances slope consolidation.

[0069] The above embodiments are intended to illustrate the present invention only and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications, or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention and should be encompassed by the scope of the claims of the present invention.

Claims

1. A method for preparing an antifreeze slope consolidation ecological substrate, characterized in that: The steps include: Step 1: Place clay in a drying oven, dry it, grind it, and screen it for later use; Step 2: Add polyethylene wax to an organic solvent and stir thoroughly with a magnetic stirrer. After stirring, place the mixture in a water bath for heating until the polyethylene wax is completely dissolved and cool to room temperature to obtain a modifier. Step 3: Add vegetable oil to nano zinc oxide, place it in a grinding jar and grind it manually, add an appropriate amount of the modifier prepared in step 2 and deionized water, ultrasonically treat it, place it in a high-pressure reactor, cool it after the reaction is completed, and place it in a drying oven to dry it to obtain modified nano zinc oxide; Step 4: Add a soil solidifier to the clay obtained in step 1, then add water, and stir evenly for the first time; then add modified nano zinc oxide, thermal conductive fiber, and soil conditioner in sequence and stir evenly again to obtain an anti-frost heave slope consolidation ecological substrate; In step 3, the purity of the nano zinc oxide is 95%, and the amount of the modifier added is 10%-15% of the mass of the nano zinc oxide; during the modification process, the temperature of the autoclave is controlled at 120-130°C; and the oven temperature is set at 70-80°C; In step 4, the soil solidifier includes a lime cement inorganic solidifier, a slag dry powder soil solidifier, a highly polymerized ion soil solidifier, an organic enzyme protein soil solidifier, or an organic-inorganic combined solidifier; and the thermal conductive fiber is a carbon fiber.

2. The method for preparing the antifreeze slope consolidation ecological substrate according to claim 1, characterized in that: In step 1, the clay is taken from river silt, the oven temperature is set to 70-80° C., and the drying time is 10-30 min; and clay with a particle size of 2-4 mm is screened out.

3. The method for preparing the antifreeze slope consolidation ecological substrate according to claim 1, characterized in that: In step 2, the organic solvent is a non-polar organic solvent, including aromatic hydrocarbons, halogenated hydrocarbons and naphthalene organic solvents.

4. The method for preparing the antifreeze slope consolidation ecological substrate according to claim 3, characterized in that: In step 2, the organic solvent is any one of turpentine, toluene, dichloroethane and tetralin.

5. The method for preparing the antifreeze slope consolidation ecological substrate according to claim 4, characterized in that: In step 2, the organic solvent is turpentine, and during the dissolution process, a constant temperature water bath is used for water bath heating, and the water bath heating temperature is controlled at 60-70°C.

6. The method for preparing the antifreeze slope consolidation ecological substrate according to claim 1, characterized in that: In step 3, the vegetable oil is any one of peanut oil, soybean oil, and corn oil.

7. The method for preparing the antifreeze slope consolidation ecological substrate according to claim 1, characterized in that: In step 4, the mass of the modified nano zinc oxide does not exceed 6% of the clay.

8. An antifreeze slope consolidation ecological substrate, characterized in that: Prepared by the preparation method according to any one of claims 1 to 7.

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