Ecological reinforcing composition for river levee and lake levee and construction method of ecological reinforcing composition

Abstract

The invention relates to the technical field of river regulation, discloses an ecological reinforcing composition for river levees and lake levees and a construction method of the ecological reinforcing composition, and aims to solve the problems that traditional river levees and lake levees depend on riprap / piling, the anti-impact stability is weak, the consumption amount of industrial and mining solid waste is low, and ecological damage is caused. According to the invention, a cement-free flow state system is formed by taking multiple industrial and mining solid wastes as a core functional component, matching with an in-situ embankment soil material as an aggregate and combining with a geopolymer activator and an ecological regulator; during construction, double-row drilling-layered pouring is performed along a river embankment / lake embankment base, and an integrated structure of a deep embedded embankment foundation stable layer and a surface layer anti-impact ecological barrier is formed after solidification. The method is high in anti-impact capacity and good in ecological compatibility, industrial and mining solid waste is consumed in a high proportion, solid waste stockpiling pollution is greatly reduced, the flood and washing resisting capacity of an embankment foundation is enhanced, and the problems of ecological damage and high cost of a traditional technology are solved.

Description

Technical Field

[0001] This invention relates to the field of river management technology, specifically to an ecological reinforcement composition for river and lake embankments based on a high proportion of multi-industrial and mining solid waste-geological polymers and its construction method. Background Technology

[0002] River and lake embankments are core hydraulic structures for resisting floods and protecting riverside facilities, but traditional reinforcement techniques have significant drawbacks:

[0003] 1. Weak erosion resistance and easy damage to the dike foundation: Traditional reinforcement relies on riprap and wooden piles, which can only strengthen the surface protection and cannot solve the problem of the dike foundation (soil below the dike foot) being eroded by floods. In rivers with high sediment content, such as the Yellow River, floods have high sediment content and fast flow velocity, which can easily erode the dike foundation and form "piping", leading to the collapse of the dike. In historical flood disasters, more than 60% of the damage to river dikes is due to the erosion of the dike foundation.

[0004] 2. Low disposal of industrial and mining solid waste and poor environmental performance: my country produces more than 3 billion tons of industrial and mining solid waste such as fly ash, desulfurization gypsum, red mud and phosphogypsum every year. Existing river embankment reinforcement technology is only used in a small amount (solid waste accounts for ≤30%), and a large amount of solid waste is piled up, occupying land and polluting soil.

[0005] 3. Severe ecological damage and high restoration costs: Techniques such as riprap and pile driving will damage the vegetation and soil structure around the riverbank, leading to soil erosion. The cost of ecological restoration in the later stage accounts for 20%-30% of the total investment in the project.

[0006] 4. Material dependence on external transportation, resulting in high costs: Traditional reinforcement materials (stone, wooden piles) need to be transported from other places, with transportation costs exceeding 400,000 yuan per kilometer, especially in remote river sections where the costs are even higher. Summary of the Invention

[0007] To address the aforementioned technical shortcomings, the present invention aims to provide an ecological reinforcement composition for river and lake embankments and its construction method. This composition effectively utilizes a high proportion of industrial and mining solid waste, and combines local embankment soil with a geopolymer system to construct a "deeply embedded embankment foundation + ecological erosion resistance" reinforcement structure. This strengthens the embankment foundation's resistance to flood erosion and avoids the ecological damage and high cost issues associated with traditional processes.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0009] An ecological reinforcement composition for river and lake embankments, by weight, comprises: 50-70 parts of industrial and mining solid waste, 30-45 parts of local embankment perimeter soil, 8-11 parts of geopolymer activator, 19-24 parts of water, and 0.6-1.5 parts of ecological regulator; the local embankment perimeter soil is cohesive or sandy soil within a 500m radius of the river / lake embankment, screened to remove impurities with a particle size >4mm, and with a moisture content controlled at 22%-30%; the geopolymer activator is a composite of sodium silicate with a modulus of 2.8-3.2 and sodium hydroxide with a concentration of 28%-32%, wherein the mass ratio of sodium silicate to sodium hydroxide is 2:1-1.7:1; the ecological regulator is a compound of humic acid, sodium alginate, and plant growth regulator, wherein the mass ratio of humic acid, sodium alginate, and plant growth regulator is 4:2:1.

[0010] Furthermore, the composition of the multi-industrial and mining solid waste raw materials includes: 20-28 parts fly ash, 10-16 parts desulfurized gypsum, 8-15 parts pretreated red mud, and 7-12 parts phosphogypsum; the pretreated red mud is red mud that has been neutralized with 5%-8% ferrous sulfate for 24-36 hours and screened to a particle size ≤2mm; the phosphogypsum is industrial and mining solid waste that has been pretreated with lime to adjust the pH to 7.0-7.5 and dried to a moisture content ≤10%.

[0011] This invention also relates to a construction method for the above-mentioned ecological reinforcement composition for river and lake embankments, comprising the following steps:

[0012] S1: Raw material pretreatment:

[0013] On-site treatment of soil around the dike: Set up temporary screening stations around the river / lake dike, use vibrating screens to remove gravel and weeds, and dry / add water to adjust the moisture content to 22%-30%;

[0014] Treatment of solid waste from multiple industries and mines: Red mud is neutralized with 5%-8% ferrous sulfate for 24-36 hours and sieved to a particle size ≤2mm; phosphogypsum is mixed with lime to adjust the pH to 7.0-7.5 and dried at 80℃ to a moisture content ≤10%; fly ash and desulfurized gypsum are sieved through an 80-mesh sieve to remove coarse impurities;

[0015] Preparation of ecological regulator: Mix humic acid, sodium alginate and naphthaleneacetic acid in a ratio of 4:2:1, add water to make a 6% (w / w) aqueous solution, and set aside for later use;

[0016] S2: Solidification preparation: The treated multi-industrial and mining solid waste and the local embankment soil are put into a forced mixer and dry-mixed at 160 r / min for 3-5 min to ensure that the solid waste and soil are evenly mixed; then add geopolymer activator, water and ecological regulator aqueous solution, adjust the speed to 200 r / min and wet-mix for 6-9 min, test the slump and initial setting time, and after meeting the standards, transfer to a slurry storage tank with low-speed mixing function;

[0017] S3: Drilling and Grouting: Using a hydraulic pile driver, drill holes in a double row along the river / lake dike foundation 1-2m from the dike toe. The front row, on the water-facing side, is a reinforced anti-scour row with a hole diameter of 160-190mm, a hole spacing of 500-700mm, and a hole depth of 3.0-5.0m. The rear row, on the backwater side, is an auxiliary reinforcement row with a hole diameter of 140-170mm, a hole spacing of 700-900mm, and a hole depth of 2.5-4.0m. After cleaning the holes, use a 70-90mm diameter guide pipe to grout the solidified body in layers, each layer being 30-50cm high. The grouting pressure is controlled at 0.25-0.35MPa. The pressure is used to fully fill the pores of the dike foundation with the solidified body, without the need for vibration.

[0018] S4: Maintenance and Ecological Optimization: After the irrigation is completed, cover with a breathable and moisturizing film and maintain for 12-18 days. Sprinkle water once a day for the first 5 days to keep the surface moist. After the water flow erosion resistance test meets the standard, sow water-resistant vegetation seeds on the surface of the solidified body of the river embankment / lake embankment to complete the ecological restoration.

[0019] Furthermore, in step S3, the borehole axis is inclined at an angle of 8°-12° to the horizontal plane of the embankment.

[0020] Furthermore, in step S4, the water erosion resistance test employs a simulated flood device with a sediment content of 30 kg / m³. 3 A simulated flood with a water flow velocity of 3 m / s was applied to the surface of the solidified body for 4 hours, and the water erosion loss rate was ≤2.5%.

[0021] The beneficial effects of this invention are as follows: This invention has strong erosion resistance and good ecological compatibility. It can not only dispose of industrial and mining solid waste at a high rate, significantly reducing solid waste accumulation pollution, but also strengthen the flood scouring resistance of the dike foundation, avoiding the ecological damage and high cost problems of traditional processes. The solidified body formed after construction is deeply embedded in the dike foundation stabilization layer, which strengthens the flood scouring resistance of the dike foundation. In addition, the raw materials, such as the soil around the dike and the surrounding industrial and mining solid waste, are sourced locally, reducing material transportation costs. The ecological regulators in the raw materials promote vegetation coverage, reducing the cost of subsequent ecological restoration, and realizing the integration of "reinforcement-ecology". Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1

[0024] An ecological reinforcement composition for river and lake embankments, comprising, by weight, the following raw materials: 50-70 parts of multi-industrial and mining solid waste (including 20-28 parts of fly ash, 10-16 parts of desulfurized gypsum, 8-15 parts of pretreated red mud, and 7-12 parts of phosphogypsum), 30-45 parts of local embankment perimeter soil, 8-11 parts of geopolymer activator, 19-24 parts of water, and 0.6-1.5 parts of ecological regulator; the local embankment perimeter soil is cohesive or sandy soil within a 500m radius of the river / lake embankment, screened to remove impurities with a particle size >4mm, and with a moisture content controlled at 22%-30%; the pretreated red mud is red mud neutralized with 5%-8% ferrous sulfate for 24-36 hours and screened to a particle size ≤2mm; the phosphogypsum is red mud pretreated with lime (CaO). The solid waste is treated (pH adjusted to 7.0-7.5) and dried to a moisture content ≤10%; the geopolymer activator is a composite system of sodium silicate (modulus 2.8-3.2) and sodium hydroxide (concentration 28%-32%) (mass ratio 2:1-1.7:1); the ecological regulator is a compound of humic acid, sodium alginate and plant growth regulator (naphthaleneacetic acid) (mass ratio 4:2:1); the solidified body has a slump of 160-200mm, an initial setting time of 4-6h, a 28-day compressive strength ≥5.0MPa, a shear strength ≥1.4MPa, a water erosion loss rate ≤2.5% (simulated flow velocity 3m / s flood erosion for 4h), a heavy metal leaching amount ≤0.07mg / L, and a vegetation seed germination rate ≥85%.

[0025] Fly ash in the raw materials provides silica-alumina active components, which react with geopolymers to form a dense zeolite-like structure, reducing the permeability of the solidified body (impermeability coefficient ≤ 1×10⁻⁶). -9 (cm / s) to prevent floodwater from seeping into the embankment foundation; the desulfurized gypsum in the raw materials reacts with the aluminate in the geopolymer to form ettringite, which fills the internal pores of the solidified body, improves shear strength, and extends the initial setting time to 4-6 hours to ensure the grouting construction window; the pretreated red mud in the raw materials, after being neutralized with ferrous sulfate, has flaky particles that can interlock with the soil around the embankment and other solid waste particles, enhancing interfacial adhesion and improving the erosion resistance of the solidified body, and the Fe in the red mud 3+It can adsorb heavy metals, reducing environmental risks; the phosphogypsum in the raw material is neutralized by lime pretreatment, and synergistically generates ettringite with desulfurized gypsum, further optimizing the pore structure of the solidified body, while replacing some natural aggregates and reducing resource consumption; the local soil material around the embankment in the raw material reduces transportation costs by using locally sourced materials, and its cohesive components can improve the workability of the solidified body, while sandy particles form a skeleton support, ensuring the compatibility of the solidified body with the embankment foundation soil; the geopolymer activator in the raw material is a compound of sodium silicate and sodium hydroxide, with an activation efficiency 35% higher than the traditional system, which can efficiently activate the active components in various industrial and mining solid wastes, forming a high-strength cementitious structure without cement, avoiding cracking caused by cement hydration heat; the humic acid in the ecological regulator provides organic matter, sodium alginate improves soil water retention, and naphthaleneacetic acid promotes seed germination, and the combination of the three ensures that the vegetation coverage of the solidified body surface is ≥75%; the water in the raw material controls the slump to 160-200mm, ensuring the fluidity of the solidified body to fill the pores of the embankment foundation, and is suitable for drilling and grouting processes.

[0026] The construction method of the river and lake embankment ecological reinforcement composition in this embodiment includes the following steps:

[0027] S1: Raw material pretreatment:

[0028] On-site treatment of soil around the dike: Set up temporary screening stations around the river / lake dikes, use vibrating screens (4mm aperture) to remove gravel and weeds, and dry / add water to adjust the moisture content to 22%-30%;

[0029] Treatment of solid waste from multiple industries and mines: Red mud is neutralized with 5%-8% ferrous sulfate for 24-36 hours and sieved to a particle size ≤2mm; phosphogypsum is mixed with lime (3%-5% of the phosphogypsum mass) and the pH is adjusted to 7.0-7.5, then dried at 80℃ until the moisture content is ≤10%; fly ash and desulfurized gypsum are sieved through an 80-mesh sieve to remove coarse impurities;

[0030] Preparation of ecological regulator: Mix humic acid, sodium alginate and naphthaleneacetic acid in a ratio of 4:2:1, add water to make a 6% (w / w) aqueous solution, and set aside for later use;

[0031] This step of neutralizing the red mud reduces alkalinity (pH from 12-13 to 7.5-8.5), preventing corrosion of vegetation roots; the phosphogypsum-lime pretreatment removes soluble phosphorus (removal rate ≥90%), preventing eutrophication of water bodies and ensuring the environmental friendliness of the solidified body.

[0032] S2: Solidification preparation: First, put the multi-industrial solid waste (fly ash + desulfurized gypsum + pretreated red mud + phosphogypsum) and the local embankment soil into a forced mixer and dry mix at 160 r / min for 3-5 min to ensure uniform mixing of solid waste and soil; then add geopolymer activator, water and ecological regulator aqueous solution, adjust the speed to 200 r / min and wet mix for 6-9 min, and test the slump (160-200 mm) and initial setting time (4-6 h). After meeting the standards, transfer to a slurry storage tank with low-speed stirring function (speed 25 r / min, storage time ≤1.2 h to prevent sedimentation and stratification).

[0033] This step uses a twin-shaft forced mixer, extending the dry mixing stage to 3-5 minutes to ensure a high proportion of solid waste and soil are evenly mixed; the slurry storage tank has a built-in low-speed mixer to prevent solid waste particles from settling and to ensure the stability of the solidified body's performance during the pouring process.

[0034] S3: Drilling and Grouting (Core Step in Embankment Foundation Reinforcement): Using a hydraulic pile driver, drill holes in a double row along the river / lake embankment foundation (1-2m from the toe). The front row (water-facing side) is for reinforcing scour resistance, with a hole diameter of 160-190mm, a hole spacing of 500-700mm, and a hole depth of 3.0-5.0m (embedded into the embankment foundation stabilization layer ≥1.8m); the rear row (water-repellent side) is for auxiliary reinforcement, with a hole diameter of 140-170mm, a hole spacing of 700-900mm, and a hole depth of 2.5-4.0m (embedded into the embankment foundation stabilization layer ≥1.5m). After cleaning the holes, use a 70-90mm diameter guide pipe to grout the solidified body in layers, each layer being 30-50cm high, with the grouting pressure controlled at 0.25-0.35MPa. The pressure is used to fully fill the pores of the embankment foundation with the solidified body, without the need for vibration.

[0035] The first row of boreholes has a larger diameter, closer spacing, and greater depth, forming the "first line of defense against erosion" to resist the direct impact of floods; the inclined arrangement of the boreholes can disperse the lateral scouring force and prevent the solidified body from being "shorn" by the flood.

[0036] S4: Maintenance and Ecological Optimization: After the irrigation is completed, cover with a breathable and moisturizing film (to prevent the moisture from evaporating too quickly and cracking), and maintain for 12-18 days (sprinkle water once a day for the first 5 days to keep the surface moist); after the test meets the standards, sow water-tolerant plant seeds such as bermudagrass and tall fescue on the surface of the solidified body of the river embankment / lake embankment to complete the ecological restoration.

[0037] This step of air-conditioning membrane maintenance can reduce moisture evaporation and prevent cracking of the solidified surface; the surface is sown with water-resistant vegetation to form an "ecological buffer layer", which further weakens the impact of floods and restores the riverbank ecology.

[0038] In step S3, the borehole axis is inclined at an angle of 8°-12° to the horizontal plane of the dike foundation (inclined on the water-facing side), so that the solidified body forms an "inclined anti-scour pile", which improves the resistance to the lateral scouring force of floods and improves the anti-sliding stability by 25%-35% compared with the vertical borehole structure.

[0039] In step S4, the scour resistance test uses a simulated flood device with a sediment content of 30 kg / m³. 3 The water body (simulating the Yellow River and other sediment-laden rivers) was subjected to a simulated flood with a flow velocity of 3 m / s, and the solidified surface was washed for 4 hours. The water erosion loss rate was ≤2.5%. The germination rate of vegetation seeds was tested 21 days after sowing, and the germination rate was ≥85%, and the coverage rate was ≥75% after 30 days.

[0040] The solidified structure formed by this invention can be deeply embedded in the erosion-resistant dike foundation. The solidified body is deeply embedded in the stabilization layer of the dike foundation by double-row drilling to a depth of ≥1.5m, forming an "erosion-resistant pile group". It can directly block the scouring of the dike foundation by floods and avoid the formation of "piping". The erosion resistance stability is improved by more than 50% compared with the traditional riprap structure.

[0041] The solidified body formed by this invention forms a 10-25mm gradient layer at the contact point with the embankment soil. The density gradually decreases from the inside (solidified body core) to the outside (embankment soil), achieving a smooth transition from "rigid reinforcement to flexible embankment foundation" and reducing structural cracking caused by flood impact.

[0042] The solidified body formed by this invention retains 0.3-1.5mm interconnected pores inside, which not only facilitates the penetration of plant roots (root depth ≥400mm), but also allows excess water to permeate, preventing the embankment foundation from accumulating water and softening. At the same time, the pores provide habitat for microorganisms, improving the ecological environment of the river embankment.

[0043] The ecological reinforcement composition for river and lake embankments of the present invention is applicable to the reinforcement and repair of Yellow River embankments, river and lake embankments and river management projects. It is especially suitable for areas with large production of industrial and mining solid waste (annual production ≥ 100,000 tons) and river embankments that are prone to flood erosion. It can achieve the triple functions of "high proportion of solid waste disposal, embankment foundation strengthening and erosion resistance, and ecological restoration".

[0044] The present invention has the following advantages:

[0045] 1. Advantages of solid waste disposal and environmental protection;

[0046] Industrial and mining solid waste accounts for 50%-70% of the total, and the reinforcement of a single kilometer of river embankment can absorb 0.8-1.2 million tons of solid waste (e.g., a 1000m river embankment requires 15,000 cubic meters of solidified material, absorbing 0.9-1.05 million tons of solid waste), significantly reducing solid waste stockpiling pollution; the leaching of heavy metals is ≤0.07mg / L, which meets the "Soil Environmental Quality Standard for Agricultural Land Soil Pollution Risk Control" (GB 15618-2018), and there is no secondary pollution;

[0047] 2. Advantages in impact resistance and durability;

[0048] The solidified structure is deeply embedded in the embankment foundation stabilization layer, exhibiting a water erosion loss rate of ≤2.5% (compared to approximately 10%-15% for traditional riprap structures), and can withstand floods with a flow velocity of 3-4 m / s; its impermeability coefficient is ≤1×10⁻⁶. -9 cm / s, avoiding piping in the dike foundation; 28-day compressive strength ≥5.0MPa, extending service life to over 50 years (compared to approximately 20 years for traditional riprap structures);

[0049] 3. Cost and ecological advantages;

[0050] Using locally sourced materials (soil from the dike perimeter and solid waste from surrounding industrial and mining sites) reduces material transportation costs per kilometer by 65%-75% (from the traditional 400,000 yuan / km to 100,000-140,000 yuan / km); ecological regulators promote vegetation cover, reducing subsequent ecological restoration costs by more than 80%, achieving an integrated "reinforcement-ecology" approach.

[0051] Application examples:

[0052] Yellow River dike reinforcement project

[0053] 1. Project Overview: Located in the lower reaches of the Yellow River, the dike is susceptible to erosion by floods (historical maximum flood velocity 3.2 m / s, sediment content 35 kg / m³). 3 The project requires reinforcement of a 1200m long and 6m high dike. There are fly ash (annual production of 150,000 tons), desulfurized gypsum (80,000 tons), red mud (50,000 tons), and phosphogypsum (60,000 tons) stockpiled in the surrounding area.

[0054] 2. Solidified body formula (parts by weight): 65 parts of multi-industrial and mining solid waste (25 parts of fly ash, 14 parts of desulfurized gypsum, 12 parts of pretreated red mud, 14 parts of phosphogypsum), 32 parts of on-site embankment soil, 10 parts of geopolymer activator, 22 parts of water, and 1.2 parts of ecological regulator.

[0055] 3. Construction process:

[0056] Red mud was neutralized with 7% ferrous sulfate for 30 hours, and phosphogypsum was adjusted to pH 7.2 with 4% lime. After drying, it was mixed with other solid wastes.

[0057] The hydraulic pile driver drills holes in two rows 1.5m from the toe of the embankment. The front row has a hole diameter of 180mm, a hole spacing of 600mm, and a hole depth of 4.5m (2.0m embedded in the stabilizing layer). The rear row has a hole diameter of 160mm, a hole spacing of 800mm, and a hole depth of 3.8m (1.7m embedded in the stabilizing layer).

[0058] The solidified body is poured in layers and cured for 15 days. Then, a mixture of bermudagrass and tall fescue seeds is sown on the surface.

[0059] 4. Test results: 28-day compressive strength 5.8MPa, shear strength 1.6MPa, simulated flow velocity 3m / s sediment-laden flood scouring loss rate 2.1% after 4 hours, heavy metal leaching 0.05mg / L; 21-day vegetation germination rate 92%, 30-day coverage rate 80%; experienced 2 flood peaks (maximum flow velocity 3.1m / s) during the flood season of the year, the dike showed no scouring or piping, and the reinforcement effect was significant.

[0060] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A composition for ecological reinforcement of river and lake embankments, characterized in that, By weight, the raw material composition includes: 50-70 parts of solid waste from various industrial and mining sectors, 30-45 parts of on-site embankment soil, 8-11 parts of geopolymer activator, 19-24 parts of water, and 0.6-1.5 parts of ecological regulator. The local soil material around the embankment is cohesive or sandy soil within a 500m radius of the river / lake embankment, which is screened to remove impurities with a particle size >4mm and has a moisture content controlled at 22%-30%. The geopolymer activator is a complex of sodium silicate with a modulus of 2.8-3.2 and sodium hydroxide with a concentration of 28%-32%, wherein the mass ratio of sodium silicate to sodium hydroxide is 2:1-1.7:

1. The ecological regulator is a compound of humic acid, sodium alginate, and plant growth regulator, wherein the mass ratio of humic acid, sodium alginate, and plant growth regulator is 4:2:

1.

2. The ecological reinforcement composition for river and lake embankments as described in claim 1, characterized in that, The raw materials of the multi-industrial and mining solid waste include: 20-28 parts fly ash, 10-16 parts desulfurized gypsum, 8-15 parts pretreated red mud, and 7-12 parts phosphogypsum; the pretreated red mud is red mud that has been neutralized with 5%-8% ferrous sulfate for 24-36 hours and screened to a particle size ≤2mm; the phosphogypsum is industrial and mining solid waste that has been pretreated with lime to adjust the pH to 7.0-7.5 and dried to a moisture content ≤10%.

3. A construction method based on the ecological reinforcement composition for riverbanks and lake embankments according to any one of claims 1-2, characterized in that, Includes the following steps: S1: Raw material pretreatment: On-site treatment of soil around the dike: Set up temporary screening stations around the river / lake dike, use vibrating screens to remove gravel and weeds, and dry / add water to adjust the moisture content to 22%-30%; Treatment of solid waste from multiple industries and mines: Red mud is neutralized with 5%-8% ferrous sulfate for 24-36 hours and sieved to a particle size ≤2mm; phosphogypsum is mixed with lime to adjust the pH to 7.0-7.5 and dried at 80℃ to a moisture content ≤10%; fly ash and desulfurized gypsum are sieved through an 80-mesh sieve to remove coarse impurities; Preparation of ecological regulator: Mix humic acid, sodium alginate and naphthaleneacetic acid in a ratio of 4:2:1, add water to make a 6% (w / w) aqueous solution, and set aside for later use; S2: Solidification preparation: The treated multi-industrial and mining solid waste and the local embankment soil are put into a forced mixer and dry-mixed at 160 r / min for 3-5 min to ensure that the solid waste and soil are evenly mixed; then add geopolymer activator, water and ecological regulator aqueous solution, adjust the speed to 200 r / min and wet-mix for 6-9 min, test the slump and initial setting time, and after meeting the standards, transfer to a slurry storage tank with low-speed mixing function; S3: Drilling and Grouting: Using a hydraulic pile driver, drill holes in a double row along the river / lake dike foundation 1-2m from the dike toe. The front row, on the water-facing side, is a reinforced anti-scour row with a hole diameter of 160-190mm, a hole spacing of 500-700mm, and a hole depth of 3.0-5.0m. The rear row, on the backwater side, is an auxiliary reinforcement row with a hole diameter of 140-170mm, a hole spacing of 700-900mm, and a hole depth of 2.5-4.0m. After cleaning the holes, use a 70-90mm diameter guide pipe to grout the solidified body in layers, each layer being 30-50cm high. The grouting pressure is controlled at 0.25-0.35MPa. The pressure is used to fully fill the pores of the dike foundation with the solidified body, without the need for vibration. S4: Maintenance and Ecological Optimization: After the irrigation is completed, cover with a breathable and moisturizing film and maintain for 12-18 days. Sprinkle water once a day for the first 5 days to keep the surface moist. After the water flow erosion resistance test meets the standard, sow water-resistant vegetation seeds on the surface of the solidified body of the river embankment / lake embankment to complete the ecological restoration.

4. The construction method according to claim 3, characterized in that, In step S3, the borehole axis is inclined at an angle of 8°-12° to the horizontal plane of the embankment.

5. The construction method according to claim 3, characterized in that, In step S4, the resistance to water erosion is tested using a simulated flood device with a sediment content of 30 kg / m³. 3 A simulated flood with a water flow velocity of 3 m / s was applied to the surface of the solidified body for 4 hours, and the water erosion loss rate was ≤2.5%.

6. The application of the river and lake embankment ecological reinforcement composition as described in claims 1-2 in the reinforcement and repair of river and lake embankments.