Biological glue and multi-element solid waste synergetic sludge ecological slope and construction and monitoring method of biological glue and multi-element solid waste synergetic sludge ecological slope

Abstract

The invention relates to a biological glue synergistic multi-element solid waste sludge ecological side slope and a construction and monitoring method thereof. The ecological side slope comprises a side slope base, and a first biological glue bonding layer, a solidified sludge soil layer, a second biological glue bonding layer and a nutrient soil planting layer which are sequentially compounded on the side slope base. Compared with the prior art, the method has the advantages that the solidified sludge is used as the river slope, the utilization problem of the sludge is solved, meanwhile, the relation among the slope foundation, the solidified sludge soil layer and the nutrient soil layer is enhanced through the two layers of xanthan gum solutions, and the stability and the overall strength of the slope are enhanced.

Description

Technical Field

[0001] The invention belongs to the technical field of sludge treatment and ecological slope, and relates to a bio-glue-coordinated multi-solid waste sludge ecological slope and a construction and monitoring method thereof. Background Art

[0002] As a new technology, ecological slope protection plays an important role in protecting the river slope structure and maintaining the stability of the slope. The use of solidified silt as a slope material can significantly improve the stability of the slope. Solidified silt is treated with specific techniques to give it high strength and stability, which can effectively prevent the erosion and damage of the slope, thereby enhancing the slope's ability to resist landslides and collapse. In addition, the use of solidified silt can also improve the soil conditions of the slope, providing a better foundation for the growth of vegetation, thereby achieving the dual effects of ecological restoration and environmental improvement.

[0003] In traditional ecological slope engineering, solidified silt has been widely used as a slope material. Solidified silt is treated by adding a curing agent (such as cement, gypsum, fly ash, etc.) to give it high strength and stability. However, in actual applications, the connection between solidified silt and the slope base is often not strong enough, and there are several problems, which directly affect the overall stability of the slope: 1. Weakened bonding interface: There are usually differences in physical properties between solidified silt and the natural soil base, such as particle size, density, water content, etc. These differences make the bonding interface between the two more fragile and susceptible to external forces or environmental changes. When encountering external factors such as rainfall and earthquakes, the bonding interface may experience problems such as sliding and peeling, which in turn leads to slope instability. 2. Difference in permeability coefficient: The permeability coefficient of solidified silt materials is usually low, while the permeability coefficient of natural soil is high. Under the action of rainwater or groundwater, the migration speed of water between soil and solidified silt is inconsistent, resulting in water retention at the bonding interface, forming a sliding surface, which further aggravates the instability of the slope. 3. Stress concentration effect: The interface between solidified silt and the base of the slope is often an area of ​​stress concentration. Due to the different deformation characteristics of solidified silt and soil, stress concentration may occur at the interface when subjected to external loads (such as vehicle driving, ground subsidence). This stress concentration can easily cause cracks or sliding, thereby reducing the anti-sliding stability of the slope. 4. Plant root interference: Plants are usually planted on slopes to improve ecological benefits. However, the roots of plants will penetrate the solidified silt layer and the natural soil layer during their growth. The expansion and contraction of the roots will disturb the interface. Under long-term action, the solidified silt may detach from or slide from the base, thereby weakening the structural stability of the slope. 5. Temperature change effect: Due to the different thermal expansion coefficients of solidified silt and natural soil, when the temperature changes drastically (such as day and night temperature difference, seasonal changes), the interface between the two will expand or contract unevenly. This phenomenon may cause stress changes at the interface, resulting in cracking or loosening of the bonding surface, affecting the overall stability of the slope.

[0004] The application of traditional solidified silt materials in slope engineering has many problems, especially in terms of the connection stability with the slope base. Therefore, there is an urgent need for a new construction method to enhance the bonding force between the solidified silt and the base, improve the overall stability of the slope, and reduce the risk of slope instability. The present invention introduces bio-glue as an adhesive, proposes a new method of layered construction, significantly improves the bonding effect of the solidified silt and the base, and solves the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a bio-glue synergistic multi-solid waste silt ecological slope and its construction and monitoring method to overcome at least one of the existing solid waste, dredged silt treatment and utilization problems, and the defects of the connection stability between traditional solidified silt materials and the slope base.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] On the one hand, the present invention provides a bio-glue synergistic multi-solid waste silt ecological slope, including a slope base, and a first bio-glue bonding layer, a solidified silt soil layer, a second bio-glue bonding layer and a nutrient soil planting layer sequentially composited on the slope base.

[0008] Furthermore, the first bio-glue adhesive layer and the second bio-glue adhesive layer are obtained by spraying a bio-glue solution formed by xanthan gum and water. Xanthan gum, as a bio-glue adhesive, mainly plays the role of enhancing the adhesion of materials and preventing erosion.

[0009] Furthermore, in the bio-glue solution, the mass fraction of the xanthan gum is 1.5-2.5%, which can significantly improve the corrosion resistance and overall stability of the solidified material.

[0010] Furthermore, the solidified silt soil layer is obtained by mixing dredged silt with a multi-solid waste solidifying agent and then spreading and compacting it.

[0011] Furthermore, the multi-solid waste curing agent is made of solid waste, or a mixture of solid waste and xanthan gum;

[0012] When the multi-solid waste solidifier is mixed with solid waste and xanthan gum, its component ratio is: 100-200 parts of carbide slag, 10-20 parts of cement, 10-20 parts of gypsum, and 5-15 parts of xanthan gum. This solidifier system can effectively solidify silt and improve the compressive strength and long-term stability of the slope.

[0013] When the multi-solid waste solidifying agent is composed of solid waste, its component ratio is 100-200 parts of slag and / or fly ash and 20-30 parts of carbide slag. This solidifying agent system can further enhance the solidification effect.

[0014] Furthermore, the initial moisture content of the dredged sludge is between 40% and 60%, and the dosage of the multi-solid waste solidifying agent is 9 to 15% of the mass of the dredged sludge.

[0015] Furthermore, the thickness of the solidified silt soil layer is 5 to 10 cm, and the thickness of the nutrient soil planting layer is 0.1 to 0.3 m.

[0016] Furthermore, the slope of the slope base is 1:0.75 to 1:1.

[0017] In a second aspect, the present invention provides a method for constructing a bio-glue-coordinated multi-solid waste muddy ecological slope, characterized in that it comprises the following steps:

[0018] S1. Clear the construction obstacles on the slope base, level it and compact it;

[0019] S2, preparing a bio-adhesive adhesive solution, and spraying it on the slope surface of the slope base to obtain a first bio-adhesive adhesive layer;

[0020] S3, taking the dredged sludge and the multi-solid waste solidifying agent and mixing them fully and quickly to obtain a solidified soil material, and spreading it on the slope surface of the slope base sprayed with the first bioadhesive bonding layer in S2, and compacting it to form the solidified sludge soil layer;

[0021] S4, spraying a bio-glue adhesive solution onto the solidified silt soil layer compacted in S3 to obtain a second bio-glue adhesive layer;

[0022] S5. Covering the solidified silt soil layer sprayed with the second bio-adhesive bonding layer in S4 with nutrient soil to obtain the nutrient soil planting layer.

[0023] Furthermore, the prepared bio-adhesive solution is a xanthan gum aqueous solution with a mass fraction of 1.5-2.5%, and the spraying amount of S2 and S4 is 3-5 L / m 2 , preferably 4L / m 2 .

[0024] Furthermore, grass seeds may be sown on the nutrient soil planting layer, illustratively, tall fescue, ryegrass, etc.

[0025] In the third aspect, the present invention provides a monitoring method for a bio-gel-cooperative multi-solid waste mud ecological slope, wherein a distributed optical fiber sensor is installed in the solidified mud soil layer to detect information including temperature, displacement, soil pressure or strain. The stress and strain at each point on the slope can be measured to continuously monitor the strength of the soil and ensure the stability and safety of the solidified mud slope throughout its life cycle.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] (I) The silt slope material of the present invention is made by solidifying river silt, making use of local silt resources according to local conditions, reducing the cost of silt treatment, and using the rich ecological substances in the silt to supplement the slope nutrition. Compared with traditional slope materials, silt is cheaper and more environmentally friendly.

[0028] (ii) The adhesive material of the present invention is a xanthan gum solution. Using xanthan gum as an adhesive strengthens the combination of the solidified soil material and the slope base. The xanthan gum effectively fills the pores between the soil particles, forming a fibrous and mesh structure, enhancing the connection ability between the soil layers, and organically combining the solidified soil material with the slope base and the nutrient soil into a whole, thereby enhancing the overall stability of the slope and providing sufficient nutrition and growth environment for subsequent vegetation coverage. At the same time, the xanthan gum coating can effectively reduce the permeability coefficient, thereby improving the ability of the slope to resist water erosion and reducing soil and water loss.

[0029] (III) The curing agent involved in the present invention is solid waste. The curing agent adopts solid waste such as calcium carbide slag, cement, gypsum, fly ash, slag, etc. The reactions involved in the above solid waste and dredged sludge are as follows:

[0030] Ca(OH)2+H2O→Ca 2+ +OH - (1)

[0031] Ca 2+ +OH - +CO2→CaCO3 (2)

[0032] SiO2 / Al2O3+Ca 2+ +OH - →CSH / CAH (3)

[0033] SO4 2- +CSH→AFt (4)

[0034] (IV) The silt slope material described in the present invention is prepared by directly mixing the curing agent and the silt at the construction site, without the need to dehydrate the silt. This is convenient and quick, reduces the cost of silt treatment, and improves the silt treatment effect and utilization rate.

[0035] (V) The ecological slope monitoring method provided by the present invention adopts distributed optical fiber for monitoring and deploys a distributed optical fiber sensor network in the site. Optical fiber sensing has the advantages of high sensitivity and strong anti-interference ability, and can accurately capture the dynamic change process of soil pressure, providing a basis for analyzing the formation of negative pressure seepage field. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 The surface strength of the three construction sections in Example 1 varies with the zero period;

[0037] Figure 2 The moisture content of the three construction sections in Example 1 varies with the zero period;

[0038] Figure 3 The pH values ​​of the three construction sections in Example 1 vary with the zero period;

[0039] Figure 4 It is a schematic diagram of the construction of the slope surface of the ecological slope of bio-glue synergistically combining multiple solid waste silt;

[0040] Figure 5 This is a construction process flow chart of the bio-glue-coordinated multi-solid waste muddy ecological slope of the present invention.

[0041] Description of the markings in the figure:

[0042] 1-Biological glue bonding layer, 2-Solidified silt soil layer, 3-Nutritional soil planting layer, 4-Distributed optical fiber sensor. DETAILED DESCRIPTION

[0043] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0044] In order to overcome the existing problems of solid waste, dredged sludge treatment and utilization, and the problems of stability of connection between traditional solidified sludge materials and slope base, the present invention provides a construction method of multi-solid waste sludge ecological slope with bio-glue, see Figure 1 and Figure 2 As shown, specifically including:

[0045] (1) River channel survey and silt sampling

[0046] First, a detailed on-site survey is conducted on the river areas where dredged silt exists and slope protection works are required to comprehensively assess their environmental conditions. Subsequently, silt samples are collected and systematically analyzed and tested in the laboratory to determine the most appropriate curing agent ratio and dosage to ensure the stability and effectiveness of subsequent construction.

[0047] (2) Slope improvement

[0048] Before construction, clear all obstacles on the slope that may affect construction, such as weeds, stones, etc., to ensure a clean construction environment. Then, level the slope base and compact it with tamping equipment to enhance the bearing capacity and stability of the slope, ensuring that the slope rate of the slope base is within 1:0.75 to 1:1.

[0049] (3) Adhesive preparation and spraying

[0050] Using the slow addition method, the xanthan gum powder is gradually added to the stirring water to prepare a xanthan gum solution (mass fraction is about 1.5-2.5%). The solution is evenly sprayed on the surface of the slope base to form a bio-adhesive bonding layer 1 to ensure good adhesion between subsequent construction materials and the base.

[0051] (4) Sludge solidification treatment

[0052] According to the determined ratio, the mixed curing agent is transported to the construction site, and the curing agent and silt are fully mixed using a powerful mixing device to form a solidified soil material. Subsequently, the treated solidified soil is evenly spread on the slope surface and compacted using a compaction machine to ensure the compactness and stability of the solidified silt soil layer 2 formed.

[0053] (5) Spray adhesive again

[0054] A layer of xanthan gum solution (mass fraction of about 1.5-2.5%) is evenly sprayed on the surface of the compacted solidified silt to form another layer of bio-adhesive bonding layer 1 to further enhance the viscosity of the solidified silt soil layer 2, ensure tight bonding between the solidified soil and the subsequent covering nutrient soil layer, and improve the stability of the entire structure.

[0055] (6) Ecological planting

[0056] A layer of nutrient soil is covered on the surface of the solidified silt soil layer 2, and grass seeds are evenly sown to start ecological planting to form a nutrient soil planting layer 3. Next, necessary maintenance management is carried out to ensure the healthy growth of vegetation and provide further ecological protection for the slope.

[0057] (7) Intelligent monitoring system

[0058] Distributed optical fiber sensors 4 are buried in the slope to build an intelligent monitoring system to monitor key data such as the slope erosion degree, soil settlement, soil pressure distribution and soil moisture content in real time, so as to promptly discover and respond to potential slope safety issues.

[0059] In the following embodiments, the dredged sludge was taken from a river section in Jurong City, Jiangsu Province, with a water content of 40.5%, and liquid limits and plastic limits of 30% and 22.5%, respectively.

[0060] The rest of the raw materials or processing techniques, unless otherwise specified, are conventional commercially available raw materials or conventional processing techniques in the art.

[0061] Embodiment 1:

[0062] For river slope sites, this embodiment provides a bio-glue-coordinated multi-solid waste mud ecological slope and a construction monitoring method thereof, specifically including:

[0063] (1) Site investigation

[0064] The width, length, slope and curvature of the river channel are detected to determine the thickness and amount of river silt to ensure that it meets the construction requirements. Silt samples are taken every 20 meters and brought back to the laboratory for liquid limit test, water content test, toxicity leaching test, and to determine the curing agent ratio.

[0065] (2) Site preparation

[0066] Complete the cleaning of the site surface, remove the surface trees, dead grass, brick slag and other debris. After the cleaning is completed, the artificial pits should be filled and compacted, and rolled to the specified compaction degree, and the flat slope base should be determined for easy construction, and the slope rate of the slope base should be about 1:0.8.

[0067] (3) Preparation and spraying of adhesive

[0068] Take a certain amount of xanthan gum powder, pre-disperse it in a container, use a small amount of water to keep it moist, reduce the agglomeration phenomenon in the subsequent stirring, add the pre-dispersed xanthan gum powder into a certain amount of water, use a stirrer to stir at a low speed, so that the xanthan gum is fully dissolved in the aqueous solution, and ensure that a uniform aqueous solution (mass fraction is about 2%) is formed. After the xanthan gum is fully dissolved, its pH value is detected and adjusted to between 6.0-8.0 to ensure its stable working state.

[0069] Use a spray gun or roller to spray along the slope from top to bottom, avoid oblique spraying to reduce the unevenness of the adhesive. When spraying, the next coat of paint should cover one-third or one-quarter of the previous coat to prevent leakage. The spraying volume is controlled at 4L / m 2 .

[0070] (4) Solidification of sludge

[0071] The river slope is divided into three sections along the length direction, and the silt is solidified using different curing agent ratios.

[0072] The first section uses carbide slag, cement, gypsum and xanthan gum as curing agents, and the mixing ratio of each component is 20:1:1:1.57, and the amount of curing agent is about 10% of the solidified sludge. Cement can improve the strength and stability of sludge. The second section uses slag and carbide slag as curing agents, and the mixing ratio of each component is 4:1. The curing agent is about 10% of the dredged sludge. The slag uses the alkaline components contained in it to react chemically with the sludge, thereby strengthening the sludge. The third section uses fly ash and carbide slag as curing agents in a ratio of 4:1, and the curing agent is about 10% of the dredged sludge. Fly ash makes the sludge more compact, improves the strength, and prevents the sludge from loosening. At the same time, after the fly ash is filled, the surface is smooth and dense, which can completely isolate the sludge from water.

[0073] Measure the curing agent corresponding to the mass of silt, mix it with the silt, and use a mixer to fully stir the mixed materials. Spread the solidified silt soil evenly on the slope surface with a thickness of 7cm. Use excavators, bulldozers and other equipment to lay and compact the silt soil to ensure that it is closely combined with the slope base.

[0074] (5) Spraying adhesive

[0075] On the smoothed solidified silt soil layer 2, a second layer of xanthan gum solution is evenly sprayed using a spray gun and a roller.

[0076] (6) Ecological planting

[0077] Sow grass seeds or choose suitable herbs and shrubs for planting to improve the soil's retention capacity. The slope should be loosened to a depth of no less than 0.10m. Slopes with thin soil should be covered with 0.10-0.30m thick planting soil. Use light machinery combined with manual leveling to complete the planting soil paving to ensure stable connection between soil layers. Use two or more seeds for mixed sowing, or sow a single variety in different areas. Sow seeds evenly and cover the entire area.

[0078] (7) Monitoring and control measures

[0079] Distributed optical fiber sensors 4 are buried on the slope surface to continuously monitor the slope erosion rate, soil settlement, soil pressure distribution and soil moisture content.

[0080] In order to verify the reinforcement effect and ecological adaptability of the bio-glue and multi-solid waste of the present invention on the muddy ecological slope, this embodiment tested the surface strength, moisture content and pH value after curing through a series of experiments. The experiment selected three construction sections with different curing agent ratios, recorded the change trend of each performance index in different periods (1d, 3d, 5d, 7d, 14d) after construction, and analyzed the experimental results in detail to evaluate its stability, durability and ecological performance.

[0081] Depend on Figure 1It can be seen that the surface strength variation patterns of the three construction sections all show a trend of significant increase in strength over time after construction, showing a reinforcement effect during the curing process. Among them, the surface strength of the first section was 399kPa on the first day of construction, increased to 558.6kPa on the third day, reached 665kPa on the fifth day, and further increased to 691.6kPa on the seventh day. By the fourteenth day, due to the influence of rainfall, the surface strength dropped to 638.4kPa. The surface strengths of the second and third sections showed similar trends: the second section gradually increased from 465.5kPa on the first day of construction to 638.4kPa on the seventh day, but dropped to 598.5kPa on the fourteenth day due to rainfall; the third section increased from 452.2kPa to 598.5kPa on the seventh day, and dropped to 558.6kPa on the fourteenth day. Overall, the surface strength of each construction section increased steadily, and the first seven days showed a strong curing effect, showing the good reinforcement performance of the material of the present invention. However, the effect of rainfall on the surface strength on the fourteenth day suggests the potential interference of the external environment on the material properties, but the strength remains at a high level, reflecting the basic stability of the material.

[0082] Figure 2 The change of moisture content reflects the gradual dissipation of moisture during the solidification process and the densification process of the material. The initial moisture content of the first section was 56.76%, which dropped to 44.55% on the first day after construction, 39.91% on the third day, 35.49% on the fifth day, and further dropped to 32.21% on the seventh day. By the fourteenth day, rainfall caused the moisture content to rebound to 43.82%. Similarly, the initial moisture content of the second section was 56.76%, which dropped to 39.07% on the first day, and then changed more slowly, reaching a minimum of 35.28% on the seventh day, and rose to 36.5% on the fourteenth day due to rainfall. The downward trend of the initial moisture content of the third section was more significant, gradually dropping from 45.76% on the first day to 33.79% on the seventh day, and rising to 36.77% on the fourteenth day. The results show that the material of this embodiment can significantly reduce the moisture content of the sludge and improve its density and stability. However, the effect of rainfall on the increase of moisture content also reflects the potential improvement space of the material in terms of anti-water re-seepage.

[0083] Figure 3 It shows the trend of pH value changing with the zero period, reflecting the alkaline slow-release characteristics of the system. The pH value of the first section was 12.2 on the first day of construction, and then gradually decreased to 11.1 on the fourteenth day; the second section dropped from 12.2 to 11.12; the third section dropped from 12.29 to 11.22. Analysis found that the decrease in pH value was mainly due to the continuous consumption of alkaline substances in the system during the solidification process, chemical reactions with silt and the surrounding environment, causing the alkalinity to gradually weaken. This process shows that the solidification material has an obvious reinforcement effect in the initial stage, and at the same time, it can achieve alkaline slow-release in the later stage, which is conducive to the long-term ecological stability of the slope.

[0084] Comparative Example 1:

[0085] Traditional slope materials (such as cement, gypsum, etc.) are used to construct a solidified silt coating. The specific ratio is cement (conventional commercially available silicate cement): sand: water in a ratio of 1:2:0.5. The construction method is to simply spray or plaster the traditional mixed materials. The traditional slope coating has poor resistance to water erosion. Especially in the case of long-term water immersion or rain erosion, cement-based materials are prone to shedding and cracking. It is predicted that in the experiment, the erosion resistance time of traditional cement-based materials under the impact of water flow may be shorter, and obvious coating peeling and pore expansion are shown in the test. In the standard water erosion experiment (lasting more than 24 hours), the mass loss of traditional coatings is expected to be 15%-30%.

[0086] Due to the low bonding strength of traditional slope materials, especially in wet or humid environments, the bonding strength between the coating and the base layer may be significantly reduced. It is expected that the tensile strength of traditional coatings may be lower than 0.5MPa, and it is easy to fall off under stress or external force.

[0087] Traditional cement materials are relatively easy to construct, but the strength and water erosion resistance of the coating are relatively low, and more frequent inspection and maintenance are required after construction, especially in rainy or high-humidity environments.

[0088] Comparative Example 2:

[0089] Omit the spraying of two layers of xanthan gum solution, directly mix the bio-gum with the solid waste sludge, and carry out the coating construction. If the xanthan gum solution coating is omitted, the slope may show poor water stability. As a natural polymer, xanthan gum has good adhesion and water stability. After removal, the water erosion resistance of the solid waste sludge coating may be significantly reduced. It is predicted that in the standard water erosion experiment, the coating without the xanthan gum solution may show a higher coating peeling rate of about 20%-40%. In a humid environment, the coating may fall off, crack propagation and other problems in a short period of time.

[0090] After omitting xanthan gum spraying, the cohesiveness between bio-glue and solid waste sludge is insufficient, resulting in a reduction in connection stability. The effect of xanthan gum is to enhance the bonding force of bio-glue and solid waste sludge particles, and the bonding performance is greatly reduced after removal. It is predicted that the tensile strength of coating may only be 0.3-0.6MPa by tensile test, which is lower than the intensity of embodiment 1, and is easily affected by external tension or vibration. Under long-term exposure to external environment (such as weathering, precipitation, etc.), cracks may occur in the coating removing xanthan gum solution, reducing the stability of connection.

[0091] After omitting the xanthan gum spraying, the construction time may be shortened, but at the same time, it may face the problem of insufficient bonding performance and post-construction maintenance. The operation during construction is simpler, but due to the lack of the bonding effect of the biological glue, the durability and effect of the coating are greatly weakened.

[0092] Comparative Example 3:

[0093] In order to further explore the effect of xanthan gum on the overall performance, xanthan gum solutions with different mass fractions (1%, 1.5%, 2%, 2.5%) can be designed. The multi-solid waste and sludge components are kept consistent, and the spraying process is the same as in Example 1.

[0094] As the mass fraction of xanthan gum increases, its adhesion and anti-erosion ability gradually increase. The 2% mass fraction of xanthan gum solution has the best adhesion effect and water erosion resistance. Further increasing the concentration will cause the coating stability to decrease due to excessive viscosity. This nonlinear change shows that the effect of xanthan gum does not only rely on the enhancement of viscosity, but also involves the uniformity, ductility and stress balance between structures of the coating.

[0095] Based on experimental prediction and analysis, 2% xanthan gum mass fraction is the best, with the best water erosion resistance and the lowest water erosion loss rate (estimated to be less than 5%). The bonding stability is the strongest, the coating is uniform and there is no obvious cracking or peeling. Appropriate viscosity can ensure good coverage of the coating while avoiding the problem of coating accumulation or cracking caused by excessive viscosity. Therefore, 2% xanthan gum solution can play the best role in improving the water erosion resistance and connection stability of ecological slopes, and is an ideal choice for implementation.

[0096] In general, the present invention invents an ecological slope material and a construction monitoring method thereof by synergizing bio-glue with a variety of solid wastes. A curing agent is used to solidify dredged sludge to form a solid solidified soil structure, and xanthan gum is used as an adhesive to enhance the binding property of the solidified soil with the slope base. The construction method is divided into four layers of construction, and optical fiber sensors are buried in the slope for real-time monitoring to ensure the long-term safety and stability of the slope. The invention not only effectively handles solid waste and sludge resources, but also reduces engineering costs, improves the connection stability of the slope, and realizes environmental protection and ecological restoration through ecological planting.

[0097] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A bio-glue-coordinated multi-solid waste mud ecological slope, characterized in that: The invention comprises a slope base, and a first bio-adhesive bonding layer, a solidified silt soil layer, a second bio-adhesive bonding layer and a nutrient soil planting layer which are sequentially compounded on the slope base.

2. The bio-glue-coordinated multi-solid waste mud ecological slope according to claim 1, characterized in that: The slope rate of the slope base is 1:0.75 to 1:

1.

3. The bio-glue-coordinated multi-solid waste mud ecological slope according to claim 1, characterized in that: The first bio-glue adhesive layer and the second bio-glue adhesive layer are obtained by spraying a bio-glue solution formed by xanthan gum and water. In the bio-glue solution, the mass fraction of the xanthan gum is 1.5-2.5%.

4. The bio-glue-coordinated multi-solid waste mud ecological slope according to claim 1, characterized in that: The solidified silt soil layer is obtained by mixing dredged silt with a multi-solid waste solidifying agent and then spreading and compacting it.

5. The bio-glue-coordinated multi-solid waste mud ecological slope according to claim 4, characterized in that: The multi-solid waste curing agent is made of solid waste, or a mixture of solid waste and xanthan gum; When the multi-solid waste curing agent is mixed with solid waste and xanthan gum, the composition ratio is: 100-200 parts of carbide slag, 10-20 parts of cement, 10-20 parts of gypsum, and 5-15 parts of xanthan gum; When the multi-solid waste solidifying agent is composed of solid waste, the component ratio is 100-200 parts of slag and / or fly ash and 20-30 parts of carbide slag.

6. The bio-glue-coordinated multi-solid waste mud ecological slope according to claim 4, characterized in that: The initial moisture content of the dredged sludge is between 40% and 60%, and the dosage of the multi-solid waste solidifying agent is 9-15% of the mass of the dredged sludge.

7. The bio-glue-coordinated multi-solid waste mud ecological slope according to claim 1, characterized in that: The thickness of the solidified silt soil layer is 5 to 10 cm, and the thickness of the nutrient soil planting layer is 0.1 to 0.3 m.

8. A method for constructing a bio-glue-coordinated multi-solid waste mud ecological slope as described in any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Clear the construction obstacles on the slope base, level it and compact it; S2, preparing a bio-adhesive adhesive solution, and spraying it on the slope surface of the slope base to obtain a first bio-adhesive adhesive layer; S3, taking the dredged sludge and the multi-solid waste solidifying agent and mixing them fully and quickly to obtain a solidified soil material, and spreading it on the slope surface of the slope base sprayed with the first bioadhesive bonding layer in S2, and compacting it to form the solidified sludge soil layer; S4, spraying a bio-glue adhesive solution onto the solidified silt soil layer compacted in S3 to obtain a second bio-glue adhesive layer; S5. Covering the solidified silt soil layer sprayed with the second bio-adhesive bonding layer in S4 with nutrient soil to obtain the nutrient soil planting layer.

9. The construction method of a bio-glue-coordinated multi-solid waste mud ecological slope according to claim 8, characterized in that: The prepared bio-glue adhesive solution is a xanthan gum aqueous solution with a mass fraction of 1.5-2.5%, and the spraying amount of S2 and S4 is 3-5 L / m 2 .

10. A method for monitoring ecological slopes of bio-glue-coordinated multi-solid waste mud as claimed in any one of claims 1 to 7, characterized in that: Distributed optical fiber sensors are also installed in the solidified silt soil layer to detect information including temperature, displacement, soil pressure or strain.

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