High-strength heavy metal adsorbing soft soil curing agent, preparation method and application thereof

Abstract

The application relates to the technical field of soil improvement, in particular to a high-strength heavy metal adsorption soft soil curing agent and a preparation method and application thereof, the raw materials of the soft soil curing agent include 20-75 parts of steel slag, 10-60 parts of slag, 5-45 parts of cement, 10-45 parts of fly ash, 0.5-3 parts of potassium fulvate, 2-15 parts of a silane coupling agent and 1-9 parts of an additive, the preparation method is simple, the application in soft soil improvement can improve the mechanical properties and heavy metal stability of the soft soil, and the heavy metal pollution degree of the soft soil is reduced; and the application effectively solves the technical problems that heavy metal ions are prone to migration in the existing cured soil and the mechanical properties are poor.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of soil improvement, in particular to a high-strength heavy metal adsorption soft soil stabilizer and a preparation method and application thereof. BACKGROUND

[0002] Soft soil generally refers to cohesive soil in a soft plastic or flow plastic state, which has the characteristics of high water content, high compressibility, low shear strength and low bearing capacity. Under the action of external load, soft soil foundation is prone to large settlement and uneven deformation, so it is necessary to carry out curing treatment on soft soil, change the physical and chemical structure of soft soil, improve the bearing capacity of soft soil and ensure the structural safety of buildings. At present, the conventional method for reinforcing soft soil is to add cement, lime, industrial solid waste and the like as a stabilizer to the soft soil to improve the soft soil into stabilized soil to improve its bearing capacity, but the stabilized soil improved by the conventional soft soil stabilizer often contains heavy metal pollutants such as lead, cadmium and mercury, which are easy to migrate and diffuse to the surrounding soil and groundwater system, causing ecological environmental pollution. SUMMARY

[0003] In view of the deficiencies in the prior art, the present application aims to provide a high-strength heavy metal adsorption soft soil stabilizer and a preparation method and application thereof, wherein the stabilizer prepared from steel slag, slag, cement, fly ash, potassium fulvate, silane coupling agent and external additive as raw materials can effectively improve the mechanical properties and heavy metal stability of soft soil and reduce the degree of heavy metal pollution of soft soil, thereby effectively solving the technical problems of easy migration of heavy metal ions in the existing stabilized soil and poor mechanical properties.

[0004] In order to achieve the above technical purpose, the present application adopts the following technical scheme:

[0005] In one technical scheme of the present application, a high-strength heavy metal adsorption soft soil stabilizer is provided, and the raw materials thereof include, by weight fraction, 20-75 parts of steel slag, 10-60 parts of slag, 5-45 parts of cement, 10-45 parts of fly ash, 0.5-3 parts of potassium fulvate, 2-15 parts of silane coupling agent and 1-9 parts of external additive; wherein the preparation raw materials of the external additive include 5-30 parts of white resveratrol and 5-36 parts of diacetylene ketone.

[0006] In some possible embodiments, the raw materials of the soft soil stabilizer include, by weight fraction, 27-64 parts of steel slag, 20-50 parts of slag, 15-36 parts of cement, 15-40 parts of fly ash, 1-2.5 parts of potassium fulvate, 5-13 parts of silane coupling agent and 2-6 parts of external additive; wherein the preparation raw materials of the external additive include 8-26 parts of white resveratrol and 8-32 parts of diacetylene ketone.

[0007] In some possible embodiments, the average particle size of the steel slag is 1-30 μm; preferably, the average particle size of the steel slag is 5-20 μm.

[0008] In some possible implementation manners, the average particle size of the slag is 1-25 μm; preferably, the average particle size of the slag is 3-19 μm.

[0009] In some possible implementation manners, the average particle size of the fly ash is 2-24 μm; preferably, the average particle size of the fly ash is 5-17 μm.

[0010] In some possible implementation manners, the mass ratio of the silane coupling agent to the additive is (1-5): 1.

[0011] Preferably, the mass ratio of the silane coupling agent to the additive is (1.8-2.4): 1.

[0012] In some possible implementation manners, the silane coupling agent is selected from any one of KH540, KH550, KH602 and KH792. Preferably, the silane coupling agent is KH550.

[0013] The silane coupling agent in the application can improve the binding force of each inorganic powder in the curing agent system, and endow the same with a primary amine group.

[0014] In some possible implementation manners, in the additive, the mass ratio of resveratrol to diacetylene ketone is 1:(0.5-1.8).

[0015] Preferably, the mass ratio of resveratrol to diacetylene ketone is 1:(1-1.3).

[0016] In the structure of the additive of the application, the benzene ring structure in resveratrol has rigidity, which can effectively improve the mechanical properties of soft soil; the hydroxyl group in resveratrol can react with diacetylene ketone to generate an acetoacetic acid group, and the acetoacetic acid group can bond with the primary amine group on the inorganic powder to form a long chain and a crosslinking network. When subjected to external force, the stress is transmitted from the surface to the collection point along the long chain, and a part of the stress can be absorbed through the benzene ring-benzene ring structure, and the remaining stress can be shared by other long chain branches, and then the external force is completely dissipated, forming good mechanical properties. In addition, the imino group and the carbonyl group in the crosslinking network can coordinate with potassium fulvate to adsorb heavy metal ions such as lead, chromium and zinc in soft soil and form insoluble complexes through complexation reaction, change the ion form of heavy metals, reduce the mobility and bioavailability of heavy metals in soil, and thus reduce heavy metal pollution.

[0017] In some possible implementation manners, the additive is prepared by the following steps: dispersing resveratrol in deionized water, adjusting the reaction system to be alkaline, heating, adding diacetylene ketone, stirring until the reaction is completed, and then filtering, washing and drying to obtain the additive.

[0018] Preferably, the specific preparation steps of the additive are as follows: resveratrol is dispersed in deionized water, the pH of the reaction system is adjusted to 8-10 with a sodium hydroxide aqueous solution, diethyl ketone is added at a uniform speed while stirring at a temperature of 25-60 DEG C, the dropping time is 10-30 min, then the stirring is continued for 30-60 min, after the reaction is completed, filtration, washing and drying are performed to obtain the additive.

[0019] Further, the mass fraction of resveratrol in the deionized water is 30-70%.

[0020] Further, the mass fraction of the sodium hydroxide aqueous solution is 1-5%.

[0021] The application further provides a preparation method of the high-strength heavy metal adsorption soft soil stabilizer according to any one of the above aspects, comprising the following steps:

[0022] The steel slag, slag, cement, fly ash, potassium fulvate, silane coupling agent and additive are weighed and uniformly mixed to obtain the soft soil stabilizer.

[0023] Further, the preparation method of the high-strength heavy metal adsorption soft soil stabilizer according to any one of the above aspects specifically comprises the following steps:

[0024] According to weight parts, 20-75 parts of steel slag, 10-60 parts of slag, 5-45 parts of cement, 10-45 parts of fly ash, 0.5-3 parts of potassium fulvate, 2-15 parts of silane coupling agent and 1-9 parts of additive are weighed and uniformly mixed to obtain the soft soil stabilizer.

[0025] The application further provides application of the high-strength heavy metal adsorption soft soil stabilizer or the preparation method of the soft soil stabilizer in soil improvement according to any one of the above aspects, and the mass ratio of the soft soil stabilizer to the soft soil is 1: (1-4).

[0026] The application has the following beneficial effects:

[0027] (1) The soft soil stabilizer developed by using steel slag, slag, cement, fly ash, potassium fulvate, silane coupling agent and additive as raw materials has low cost and excellent stabilization performance, can effectively reduce the heavy metal pollution degree of soft soil, improve the mechanical properties of soft soil, and actively promote the resource utilization of industrial waste residues such as steel slag, slag and fly ash;

[0028] (2) The additive prepared by using resveratrol and diethyl ketone has a benzene ring and an acetoacetic acid group in the structure, the benzene ring can provide mechanical properties, the acetoacetic acid group can bond with the silane coupling agent to construct a crosslinking network in the soft soil system, improve the binding force of inorganic powder, and further optimize the mechanical properties of the soft soil test block;

[0029] (3) The soft soil stabilizer of the present application introduces potassium fulvate, and the cross-linking network constructed by the additive and the silane coupling agent cooperates with the heavy metal ions in the soft soil to generate stable complex, thereby reducing the mobility of the heavy metal ions in the soft soil. DETAILED DESCRIPTION

[0030] The present application will be described with respect to the following examples, but the present application is not limited to these examples. Although the present application will be described with reference to a preferred embodiment, this is by way of illustration only and should not be construed in a limiting sense.

[0031] Embodiment

[0032] The soft soil stabilizer of the present application includes 20-75 parts of steel slag, 10-60 parts of slag, 5-45 parts of cement, 10-45 parts of fly ash, 0.5-3 parts of potassium fulvate, 2-15 parts of silane coupling agent, and 1-9 parts of additive.

[0033] In some embodiments, the soft soil stabilizer includes 27-64 parts of steel slag, 20-50 parts of slag, 15-36 parts of cement, 15-40 parts of fly ash, 1-2.5 parts of potassium fulvate, 5-13 parts of silane coupling agent, and 2-6 parts of additive.

[0034] In some embodiments, the average particle size of the steel slag is 1-30 μm.

[0035] In some embodiments, the average particle size of the steel slag is 5-20 μm.

[0036] In some embodiments, the average particle size of the slag is 1-25 μm.

[0037] In some embodiments, the average particle size of the slag is 3-19 μm.

[0038] In some embodiments, the average particle size of the fly ash is 2-24 μm.

[0039] In some embodiments, the average particle size of the fly ash is 5-17 μm.

[0040] In some embodiments, the mass ratio of the silane coupling agent to the additive is (1-5):1.

[0041] In some embodiments, the mass ratio of the silane coupling agent to the additive is (1.8-2.4):1.

[0042] In some embodiments, the silane coupling agent is selected from any one of KH540, KH550, KH602, and KH792. Preferably, the silane coupling agent is KH550.

[0043] In some embodiments, the mass ratio of resveratrol to divinyl ketone in the admixture is 1:(0.5-1.8).

[0044] In some embodiments, the mass ratio of resveratrol to divinyl ketone in the admixture is 1:(1-1.3).

[0045] In some embodiments, the preparation steps of the admixture are as follows: dispersing resveratrol in deionized water, adjusting the reaction system to be alkaline, warming, adding divinyl ketone dropwise, stirring until the reaction is complete, and then filtering, washing, and drying to obtain the admixture.

[0046] In some embodiments, the specific preparation steps of the admixture are as follows: dispersing resveratrol in deionized water, adjusting the pH of the reaction system to 8-10 with a sodium hydroxide aqueous solution, adding divinyl ketone at a uniform speed while stirring at a temperature of 25-60°C for 10-30 min, and then continuing to stir for 30-60 min. After the reaction is complete, the admixture is obtained by filtering, washing, and drying.

[0047] Further, the mass fraction of resveratrol in the deionized water is 30-70%.

[0048] Further, the mass fraction of the sodium hydroxide aqueous solution is 1-5%.

[0049] Another embodiment of the present application provides a preparation method of the high-strength heavy metal adsorption soft soil stabilizer in the above embodiments, which comprises the following steps:

[0050] The steel slag, slag, cement, fly ash, potassium fulvate, silane coupling agent, and admixture are weighed and uniformly mixed at room temperature to obtain the soft soil stabilizer.

[0051] In some embodiments, the preparation method of the high-strength heavy metal adsorption soft soil stabilizer comprises the following steps:

[0052] In some embodiments, the preparation method of the high-strength heavy metal adsorption soft soil stabilizer comprises the following steps:

[0053] Another embodiment of the present application also provides an application of the high-strength heavy metal adsorption soft soil stabilizer or the preparation method of the soft soil stabilizer in the above embodiments in soil improvement. The soft soil stabilizer is mixed with soft soil in a mass ratio of 1:(1-4).

[0054] In order to make the objects, technical solutions and advantages of the present application clearer, the embodiments of the present application are further described in detail below. In the following examples, the raw materials used are all common commercially available goods, the reagents are analytical pure reagents, the steel slag raw material and the slag raw material are both from Maanshan Iron and Steel Co., Ltd., and the steel slag and the slag are obtained after being ground and sieved.

[0055] Example 1

[0056] In this embodiment, a high-strength heavy metal adsorption soft soil curing agent is provided, and the preparation method is as follows: 47.5 parts of steel slag, 37 parts of slag, 26.3 parts of cement, 29 parts of fly ash, 1.8 parts of potassium fulvate, 9.1 parts of KH550 and 4.4 parts of additive are uniformly mixed, and the mixture is obtained. It is calculated that the mass ratio of KH550 to additive is 2.07:1.

[0057] The preparation method of the additive comprises the following steps: 17 parts of white resveratrol are dispersed in 50 parts of deionized water, the pH of the reaction system is adjusted to 9 by using a 3% sodium hydroxide aqueous solution, 19 parts of diethyl ketone are uniformly and continuously added under stirring at 40℃, the adding time is 15 min, then the stirring is continued for 45 min, after the reaction is completed, the additive is obtained by filtration, washing and drying. It is calculated that the mass ratio of white resveratrol to diethyl ketone is 1:1.12.

[0058] Example 2

[0059] In this embodiment, a high-strength heavy metal adsorption soft soil curing agent is provided, and the preparation method is as follows: 27 parts of steel slag, 21 parts of slag, 15 parts of cement, 16.4 parts of fly ash, 1.1 parts of potassium fulvate, 5 parts of KH550 and 2.7 parts of additive are uniformly mixed, and the mixture is obtained. It is calculated that the mass ratio of KH550 to additive is 1.85:1.

[0060] The preparation method of the additive comprises the following steps: 11 parts of white resveratrol are dispersed in 30 parts of deionized water, the pH of the reaction system is adjusted to 8 by using a 3% sodium hydroxide aqueous solution, 11 parts of diethyl ketone are uniformly and continuously added under stirring at 30℃, the adding time is 10 min, then the stirring is continued for 30 min, after the reaction is completed, the additive is obtained by filtration, washing and drying. It is calculated that the mass ratio of white resveratrol to diethyl ketone is 1:1.00.

[0061] Example 3

[0062] A high-strength heavy metal adsorption soft soil stabilizer is provided in the embodiment, and a preparation method thereof is as follows: 63.5 parts of steel slag, 49.5 parts of slag, 35.3 parts of cement, 38.8 parts of fly ash, 2.2 parts of potassium fulvate, 12.7 parts of KH550, and 5.4 parts of an additive are uniformly mixed, and the mixture is ready. It is calculated that the mass ratio of KH550 to the additive is 2.35:1.

[0063] The additive is prepared by the following method: 26 parts of white resveratrol are dispersed in 70 parts of deionized water, the pH of the reaction system is adjusted to 10 by using a 3% sodium hydroxide aqueous solution, 32 parts of diethyl ketone is added at a uniform speed while stirring at 50 DEG C, the dropping time is 30 min, then the stirring is continued for 60 min, after the reaction is completed, the additive is obtained by filtration, washing, and drying. It is calculated that the mass ratio of white resveratrol to diethyl ketone is 1:1.23.

[0064] Example 4

[0065] A high-strength heavy metal adsorption soft soil stabilizer is provided in the embodiment, and a preparation method thereof is as follows: 63.5 parts of steel slag, 49.5 parts of slag, 35.3 parts of cement, 38.8 parts of fly ash, 2.2 parts of potassium fulvate, 12.7 parts of KH550, and 5.4 parts of an additive are uniformly mixed, and the mixture is ready. It is calculated that the mass ratio of KH550 to the additive is 2.35:1.

[0066] The additive is prepared by the following method: 26 parts of white resveratrol are dispersed in 70 parts of deionized water, the pH of the reaction system is adjusted to 10 by using a 3% sodium hydroxide aqueous solution, 32 parts of diethyl ketone is added at a uniform speed while stirring at 50 DEG C, the dropping time is 30 min, then the stirring is continued for 60 min, after the reaction is completed, the additive is obtained by filtration, washing, and drying. It is calculated that the mass ratio of white resveratrol to diethyl ketone is 1:1.23.

[0067] Example 5

[0068] A high-strength heavy metal adsorption soft soil stabilizer is provided in the embodiment, and a preparation method thereof is as follows: 63.5 parts of steel slag, 49.5 parts of slag, 35.3 parts of cement, 38.8 parts of fly ash, 2.2 parts of potassium fulvate, 12.7 parts of KH550, and 5.4 parts of an additive are uniformly mixed, and the mixture is ready. It is calculated that the mass ratio of KH550 to the additive is 2.35:1.

[0069] The additive is prepared by the following method: 26 parts of white resveratrol are dispersed in 70 parts of deionized water, the pH of the reaction system is adjusted to 10 by using a 3% sodium hydroxide aqueous solution, 32 parts of diethyl ketone is added at a uniform speed while stirring at 50 DEG C, the dropping time is 30 min, then the stirring is continued for 60 min, after the reaction is completed, the additive is obtained by filtration, washing, and drying. It is calculated that the mass ratio of white resveratrol to diethyl ketone is 1:1.23.

[0070] Example 6

[0071] A high-strength heavy metal adsorbing soft soil stabilizer is provided in the embodiment, and a preparation method thereof is as follows: 27 parts of steel slag, 21 parts of slag, 15 parts of cement, 16.4 parts of fly ash, 1.1 parts of potassium fulvic acid, 4 parts of KH550 and 3.7 parts of an additive are uniformly mixed to obtain the soft soil stabilizer.

[0072] The additive is prepared by the same method as in Embodiment 2.

[0073] Embodiment 7

[0074] A high-strength heavy metal adsorbing soft soil stabilizer is provided in the embodiment, and a preparation method thereof is as follows: 27 parts of steel slag, 21 parts of slag, 15 parts of cement, 16.4 parts of fly ash, 1.1 parts of potassium fulvic acid, 4 parts of KH550 and 3.7 parts of an additive are uniformly mixed to obtain the soft soil stabilizer.

[0075] The additive is prepared by the same method as in Embodiment 2.

[0076] Comparative Example 1

[0077] A soft soil stabilizer is provided in the comparative example, and a preparation method thereof is as follows: 27 parts of steel slag, 21 parts of slag, 15 parts of cement, 16.4 parts of fly ash, 1.1 parts of potassium fulvic acid, 5 parts of KH550 and 2.7 parts of an additive are uniformly mixed to obtain the soft soil stabilizer.

[0078] The additive is prepared by the same method as in Embodiment 2, except that 11 parts of resorcylic acid are used instead of 11 parts of white pigweed alcohol.

[0079] Comparative Example 2

[0080] A soft soil stabilizer is provided in the comparative example, and a preparation method thereof is basically the same as that in Embodiment 2, except that no additive is used in the preparation of raw materials.

[0081] The specific chemical composition of the steel slag and the slag used in each of Embodiments 1-7 and Comparative Examples 1-2 is shown in Table 1 and Table 2.

[0082] Table 1 Chemical composition of steel slag

[0083]

[0084] Table 2 Chemical composition of slag

[0085]

[0086] Application Example

[0087] The dried silt sample from a river in Suzhou was taken as soft soil, and the water content of the silt was 25%. The curing agent prepared in each of Examples 1-7 and Comparative Examples 1-2 was added to the silt, and the mass ratio of the curing agent to the silt was set to 1:2.3. Then, a Φ50mm×H100mm blank was prepared, demolded, and placed in a condition of a temperature of 25±2°C and a humidity of 95±2% for curing for 28 days to obtain soft soil test blocks 1-9. Among them, the product obtained by using the additive of Examples 1-7 was soft soil test blocks 1-7, and the product obtained by using the additive of Comparative Examples 1-2 was soft soil test blocks 8-9.

[0088] Performance tests were performed on the soft soil test blocks 1-9.

[0089] Mechanical property test: The compressive strength of the soft soil test blocks 1-9 at the curing time of 7d, 14d and 28d was measured according to GB / T21144-2007 "Concrete solid brick", and the test results are shown in Table 3.

[0090] Heavy metal leaching test: The soft soil test blocks 1-9 were crushed, and the toxicity leaching was performed according to HJ / T299-2007 "Solid waste leaching toxicity leaching method-sulfuric acid and nitric acid method", and the test results are shown in Table 4.

[0091] Table 3 Mechanical properties of soft soil test blocks

[0092]

[0093] Table 4 Heavy metal leaching content of soft soil test blocks

[0094]

[0095] From the data in Tables 3 and 4, it can be seen from the soft soil test blocks 1-3 that when the mass ratio of the silane coupling agent to the additive is (1.8-2.4):1 and the mass ratio of the resveratrol to the diethyl ketone is 1:(1-1.3), the soft soil test blocks have good mechanical properties and heavy metal ion complexing ability at the same time.

[0096] Compared with the soft soil test block 2, the mechanical properties and heavy metal ion complexing ability of the soft soil test block 4 are similar, which shows that the use of too much diethyl ketone in the preparation of the additive does not bring more obvious performance improvement effect to the soft soil test block.

[0097] Compared with soft soil test block 2, the mechanical properties of soft soil test block 5 decreased, but the heavy metal ion complexing ability increased, which may be due to: the amount of divinyl ketone in the additive of example 5 is less, which may lead to less acetoacetic acid group generated on the additive, and then the density of the cross-linked network constructed by KH550 is reduced, which cannot effectively diffuse external stress, so the mechanical properties of the soft soil test block decrease; but the reduction of the amount of divinyl ketone makes more active hydroxyl groups exist in the cross-linked network, which can produce complexation with heavy metal ions, so the heavy metal ion leaching amount is reduced.

[0098] Compared with soft soil test block 2, the mechanical properties of soft soil test block 6 decreased, which may be due to: the amount of KH550 in the curing agent system of example 6 is reduced, which may affect the long chain structure in the cross-linked network, leading to the reduction of stress dispersion path, so the mechanical properties of the soft soil test block are poor.

[0099] Compared with soft soil test block 2, the mechanical properties of soft soil test block 7 decreased, which may be due to: the amount of additive in the curing agent of example 7 is less, which leads to the reduction of the number of benzene ring-benzene ring structure and cross-linking density in the cross-linked network, affecting the rapid dissipation of external stress; it can be seen that even if KH550 can provide better inorganic powder bonding strength, but lack of the cooperation of additive, it will still lead to the decrease of mechanical properties.

[0100] Compared with soft soil test block 2, the mechanical properties of soft soil test block 8 decreased, which may be due to: the additive used in soft soil test block 8 is the additive prepared in comparative example 1, which uses m-trihydroxybenzene instead of resveratrol, which may reduce the grafting rate of m-trihydroxybenzene and divinyl ketone due to steric hindrance, leading to less acetoacetic acid group generated, and the density of the cross-linked network constructed by KH550 is reduced, and the intersection of long chain has only one benzene ring, lacking benzene ring-benzene ring sharing path, which further affects the stress buffering capacity of the cross-linked network, so the mechanical properties of the obtained soft soil test block are poor.

[0101] Compared with soft soil test block 2, the mechanical properties of soft soil test block 9 decreased, which may be due to: no additive is used in the system, which cannot bond with KH550, and no cross-linked network with benzene ring-benzene ring structure as the intersection point is formed in the system, which leads to the significant reduction of the dispersion path of the system to external stress, so its mechanical properties decrease significantly.

[0102] Although the preferred embodiments of the present application have been disclosed as above, they are not intended to limit the present application, and any person skilled in the art can make possible changes and modifications to the technical solutions of the present application by using the methods and technical contents disclosed above without departing from the spirit and scope of the present application. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application without departing from the technical solutions of the present application shall fall within the protection scope of the technical solutions of the present application.

Claims

1. A high-strength heavy metal adsorbent for solidifying soft soil, characterized in that, The preparation raw materials of the soft soil stabilizer include 20-75 parts of steel slag, 10-60 parts of slag, 5-45 parts of cement, 10-45 parts of fly ash, 0.5-3 parts of potassium fulvate, 2-15 parts of silane coupling agent KH550 and 1-9 parts of additive; the preparation raw materials of the additive include 5-30 parts of white resveratrol and 5-36 parts of diacetylene ketone; The mass ratio of the white resveratrol to diacetylene ketone is 1: (0.5-1.8); The additive is prepared by the following steps: The white resveratrol is dispersed in deionized water, and the pH of the reaction system is adjusted to 8-10 by using a sodium hydroxide aqueous solution; then, diacetylene ketone is added at a uniform speed under the condition of 25-60℃ while stirring; the dropping time is 10-30 min; then, the stirring is continued for 30-60 min; after the reaction is completed, the additive is obtained by filtration, washing and drying.

2. The high-strength heavy metal adsorbing soft soil solidifying agent according to claim 1, characterized by, The preparation raw materials of the soft soil stabilizer include 27-64 parts of steel slag, 20-50 parts of slag, 15-36 parts of cement, 15-40 parts of fly ash, 1-2.5 parts of potassium fulvate, 5-13 parts of silane coupling agent and 2-6 parts of additive; the preparation raw materials of the additive include 8-26 parts of white resveratrol and 8-32 parts of diacetylene ketone.

3. The high-strength heavy metal adsorbing soft soil solidifying agent according to claim 1, characterized by, The average particle size of the steel slag is 1-30 μm; the average particle size of the slag is 1-25 μm; the average particle size of the fly ash is 2-24 μm; and the mass ratio of the silane coupling agent to additive is (1-5):

1.

4. The high-strength heavy metal adsorbing soft soil solidifying agent according to claim 1, characterized by comprising, The average particle size of the steel slag is 5-20 μm; the average particle size of the slag is 3-19 μm; and the average particle size of the fly ash is 5-17 μm.

5. The high-strength heavy metal adsorbing soft soil solidifying agent according to claim 1, characterized by comprising: The mass ratio of the white resveratrol to diacetylene ketone is 1: (1-1.3).

6. The high-strength heavy metal adsorbing soft soil solidifying agent according to claim 1, characterized by comprising: In the preparation steps of the additive, the mass fraction of the white resveratrol is 30-70%; and the mass fraction of the sodium hydroxide aqueous solution is 1-5%.

7. A method of producing a high-strength heavy metal adsorbing soft soil stabilizer according to any one of claims 1 to 6, characterized by, The method includes the following steps: The steel slag, slag, cement, fly ash, potassium fulvate, silane coupling agent and additive are weighed and uniformly mixed to obtain the soft soil stabilizer.

8. Use of a high-strength heavy metal adsorbing soft soil stabilizer according to any one of claims 1 to 6, or a method of producing a soft soil stabilizer according to any one of claim 7, in soil improvement, characterized in that, The mass ratio of the soft soil stabilizer to soft soil is 1: (1-4).

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