Curing material for thin uniform-thickness solidified soil diaphragm wall and construction method

Abstract

The invention discloses a curing material for a thin equal-thickness cured soil diaphragm wall, the curing material comprises 60-80% of a cutting agent and 20-40% of a curing agent, the cutting agent is obtained by uniformly mixing 20-50 parts of an anti-permeability component, 3-8 parts of a drag reduction component, 600-800 parts of a low-activity filler component, 5-12 parts of a water reduction component and 0-150 parts of a dispersion component; the curing agent is obtained by uniformly mixing 50-100 parts of a gelling component, 200-400 parts of a medium-high activity component, 10-20 parts of an excitation component, 2-5 parts of a water reducing component and 0-2 parts of a defoaming component. The invention further provides a construction method of the stabilized soil diaphragm wall, the cutting agent and the curing agent are both added into the soil body in the form of slurry, the cutting agent is firstly used for secondary cutting and stirring, then the curing agent is used for stirring and curing to form the wall, and the thickness of the stabilized soil diaphragm wall can reach 300-500 mm. Through wide improvement of curing materials, the construction thickness and the water adding amount of the cured soil diaphragm wall are reduced, the anti-seepage performance, the curing strength and the construction efficiency of the diaphragm wall are improved, and the economical efficiency and the safety of the diaphragm wall are greatly improved.

Description

Technical Field

[0001] The invention relates to a solidifying material for a thin equal-thickness solidified soil anti-seepage wall and a construction method. Background Art

[0002] The anti-seepage wall is an underground continuous wall built in a loose permeable layer or earth-rock dam (weir) to play an anti-seepage role. It plays an important role in the foundation pit curtain anti-seepage project, and plays the function of isolating groundwater seepage. At present, the underground anti-seepage wall generally adopts the TRD construction method. The tool box on the chain-type slotting machine makes horizontal lateral movements on the reinforced soil, and the solidified material is evenly mixed into the soil to form an underground continuous wall with a certain strength and thickness. Its main features are continuous underground wall, good anti-seepage performance, consistent thickness, good wall uniformity, and safe construction. Compared with traditional three-axis and five-axis mixing walls, it has no water-permeable weak points and better anti-seepage performance. It has been widely used in many water conservancy anti-seepage projects.

[0003] In recent years, in the TRD construction of anti-seepage walls, water injection or bentonite slurry is generally used to cut the soil first, and then cement is used for mixing and reinforcement. This results in excessive water being actually added, and a large amount of slurry overflows from the construction surface, causing muddy sites and inconvenience in construction; and the addition of a large amount of water dilutes the hydration reaction of the solidifying material, which reduces the solidification strength and the impermeability of the reinforced soil for some soils with high porosity; at the same time, the reinforcement material uses high-energy cement materials with poor environmental protection. The conventional anti-seepage wall construction thickness is 600-1200mm, which is relatively thick. The construction of large thickness leads to high cost, and increases the equipment size and construction period, which hinders the further expansion of the application of anti-seepage walls. In view of this, this method improves the strength and impermeability of the reinforced soil, reduces the construction thickness of the anti-seepage wall, and further improves the economy, reliability and environmental protection of the anti-seepage wall technology through material improvement and construction optimization. Summary of the invention

[0004] The present invention is to solve the problems existing in the above-mentioned prior art and provides a solidifying material for thin equal-thickness solidified soil anti-seepage wall and a construction method.

[0005] The technical solutions adopted in the present invention are: A solidifying material for a thin equal-thickness solidified soil anti-seepage wall comprises 60-80% of a cutting agent and 20-40% of a solidifying agent, and is added in steps during the mixing construction of the anti-seepage wall.

[0006] The cutting agent is obtained by uniformly mixing 20-50 parts of an anti-seepage component, 3-8 parts of a drag-reducing component, 600-800 parts of a low-activity filler component, 5-12 parts of a water-reducing component and 0-150 parts of a dispersing component.

[0007] The curing agent is obtained by mixing 50-100 parts of gelling components, 200-400 parts of medium-high activity components, 10-20 parts of exciting components, 2-5 parts of water reducing components and 0-2 parts of defoaming components.

[0008] The anti-seepage component is one or more of montmorillonite powder, talcum powder, diatomaceous earth, and expanded pearlite powder, with a specific surface area of ​​not less than 800m 2 / kg; the drag reduction component consists of 30-50% guar gum and its derivatives, 20-40% PAM and 10-30% hydrogenated styrene polyisoprene.

[0009] The low-activity filler component is composed of one or more of stone powder, waste ceramic powder, brick slag powder, fly ash, volcanic ash, and quartz tailing powder, with a 28d activity index of less than 60% and a specific surface area of ​​not less than 500m 2 / kg; The cementitious component is composed of 20-40% C2S cement clinker, 60-70% C3S cement clinker and 5-10% hemihydrate gypsum; The medium and high active components are one or more of slag powder, ultrafine kaolin, wollastonite powder, modified mica powder and silica powder, with a 28d activity index greater than 60% and a specific surface area of ​​not less than 400m 2 / kg.

[0010] The water reducing component is one of melamine-based, aliphatic-based and naphthalenesulfonate water reducing agents; The dispersed component is tailings dredged from rivers and lakes, with a fineness modulus of 0.6-2.0 and an average particle size of less than 0.25 mm; The exciting component is composed of 50-80% slaked lime, 20-40% sodium carbonate, and 5-10% triethanolamine; The defoaming components polysiloxane, special emulsifier and high-activity polyether defoaming agent are polymerized through a process.

[0011] Furthermore, the initial setting time of the cutting agent in the solidified material is greater than 18 hours, and the initial setting time of the curing agent is 6-9 hours.

[0012] Furthermore, the mass mixing ratio of the solidifying material for the solidified soil anti-seepage wall is 8-15%, the unconfined compressive strength after solidification is not less than 1MPa at 28 days, and the permeability coefficient is not greater than 1×10 -7 cm / s.

[0013] The present invention also discloses a construction method of a thin equal-thickness solidified soil anti-seepage wall, comprising the following steps: P1: Arrange the machinery and equipment on site, mark the location of the solidified soil anti-seepage wall to be constructed, and divide the solidified soil anti-seepage wall into multiple sections. At the same time, ensure that the foundation bearing capacity of the solidified soil anti-seepage wall construction machinery station area is higher than 150kpa or the full thickness of the steel plate is not less than 1cm; P2: A slurry return groove with the same width as the solidified soil slurry return groove is excavated on the surface of the construction slurry return groove. The depth of the slurry return groove is determined by calculation. At the same time, a slurry overflow port is excavated at one end of the slurry return groove. The height of the overflow port is not less than 10 cm; P3: Dig a pre-embedded hole near the starting point of the solidified soil anti-seepage wall. The depth of the pre-embedded hole should be no less than 2.5m, the length should be no less than 1.5m, and the width should be no less than 1m. Put the pre-embedded box in the pre-embedded hole, and then put the cut box into the pre-embedded box section by section. P4: The chain-type slotting machine moves to a position close to the pre-embedded hole, and then connects with the single-section cutting box in the pre-embedded hole. Then the chain-type slotting machine moves to the construction position, adjusts the construction verticality, and injects water for vertical cutting. After reaching the single-section cutting depth, lift the cutting box, connect and cut the next section of the cutting box, until the designed cutting depth is met; P5: Mix water and cutting agent evenly according to the water-cement ratio of 1:0.7-1:1.3 to obtain cutting fluid, use the cutting fluid to cut the soil, and use jet construction at the same time; during soil cutting construction, use reciprocating secondary cutting construction, and after the primary cutting construction reaches the end point of the single-section anti-seepage wall, perform reverse secondary cutting construction; P6: After the cutting construction of the single-stage anti-seepage wall is completed, water and curing agent are prepared into a curing liquid according to a water-cement ratio of 1:0.4-1:0.6, and a stirring and curing construction is carried out to evenly mix the curing liquid into the soil containing the cutting fluid to form a solidified soil anti-seepage wall of equal thickness; P7: After completing the cutting and mixing solidification construction of a single section of the cut-off wall, repeat steps P5 and P6 to continue the cutting and mixing solidification construction of the next section of the cut-off wall to form a continuous underground cut-off wall of equal thickness solidified soil until the entire construction of this project is completed.

[0014] Furthermore, the depth of the return slurry groove is determined by calculation, and the depth of the return slurry groove is the total slurry height of the cutting fluid and the solidifying fluid injected into the cut-off wall with the same width plus the height of the slurry overflow port multiplied by the surplus coefficient (1.2-1.5).

[0015] Furthermore, the thickness of the solidified soil anti-seepage wall is determined by the width of the cutting box. After improvement, the width of the single-section cutting box is 250-450mm, which can meet the wall construction requirements of a solidified soil anti-seepage wall with a width of 300-500mm.

[0016] Furthermore, the primary cutting speed is 2-5 m / h, the secondary cutting speed is 8-20 m / h, the length of each section of the anti-seepage wall is preferably 10-20 m, and the stirring and curing speed is 3-8 m / h.

[0017] Furthermore, after the cutting box is pulled out, the cutting box body needs to be rinsed with clean water. When the waiting time after the cutting construction is completed exceeds 15 hours, the cutting box needs to be cleaned. When the waiting time after the curing and mixing construction is completed exceeds 5 hours, the cutting box needs to be cleaned.

[0018] The present invention has the following beneficial effects: (1) The present invention greatly reduces the wall thickness of the solidified soil anti-seepage wall through extensive improvement of the solidifying material, improves the anti-seepage performance, solidification strength and construction smoothness of the reinforced soil, is applicable to the reinforcement requirements of different soil layers, and greatly reduces the cost of the anti-seepage wall, thereby improving the economic efficiency of the anti-seepage wall; (2) The curing materials in this method are divided into cutting agents and curing agents. A large proportion of low-activity cutting agents are added to the soil cutting and mixing before the curing agent, which reduces the amount of curing agent added in the subsequent curing and mixing, ensures one-time curing and mixing, and improves the construction progress and efficiency of the anti-seepage wall; (3) In the curing material of the present invention, the setting time is adjusted by adjusting the addition ratio of the medium and high active materials, ensuring that the setting time of the cutting agent is much longer than that of the curing agent, thereby reducing the influence of the material setting during the initial cutting and stirring on the construction effect; (4) The present invention adds different active cementing materials to the curing material, such as low-activity filler components, medium- and high-activity components, and cementing components, to provide continuous hydration reaction products in different curing cycles. At the same time, under the action of the stimulating components, the strength of the cured soil increases with the increase of age, making the anti-seepage cured soil more compact and more impermeable. In addition, because the amount of clinker added is greatly reduced, the corrosion resistance of the anti-seepage wall is also improved. (5) This method greatly reduces the amount of water added to the cutting agent and curing agent by adding dispersing components and water-reducing components, reduces the dilution and weakening of the curing effect caused by excessive addition of water, improves the curing strength and density, and greatly reduces the amount of slurry; (6) The curing material in this invention is added with anti-seepage, drag-reducing and defoaming functional components according to the construction process, which plays an important role in improving construction efficiency and improving the anti-seepage and compactness of the soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the overall process flow chart of the present invention; Figure 2 For the trench excavation in the construction flow chart; Figure 3 It is the hanging and placing of the embedded box in the construction flow chart; Figure 4 Connect the cutting box and the host in the construction flow chart; Figure 5 It is a cutting in the construction flow chart; Figure 6 It is the secondary cutting in the construction flow chart; Figure 7 This is the mixing and solidification in the construction flow chart.

[0020] In the figure, 1-chain type grooving machine; 2-pre-embedded holes; 3-cutting box. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] In order to characterize the curing effect of a curing material for a solidified soil anti-seepage wall provided by the present invention, setting time, curing strength and permeability coefficient are used for characterization in the following embodiments. Among them, setting time characterizes the setting speed of the curing material, and the reference standard is GB / T 1346-2011 "Test Method for Water Consumption, Setting Time and Stability of Cement Standard Consistency" - initial setting time; curing strength characterizes the curing effect of the strength of the curing material added to the solidified soil, and the reference standard is GB / T50123-2019 "Standard for Geotechnical Test Methods" - unconfined compressive strength test; permeability coefficient characterizes the curing effect of the permeability of the curing material added to the soil, GB / T50123-2019 "Standard for Geotechnical Test Methods" - variable head method. At the same time, the test method of the raw material activity index of the curing material in the present invention is carried out with reference to GB / T 18046-2017 "Granulated blast furnace slag powder used in cement, mortar and concrete" - Appendix A Activity Index. Example

[0023] The invention provides a solidifying material for a thin equal-thickness solidified soil anti-seepage wall. The solidifying material consists of 60-80% of a cutting agent and 20-40% of a curing agent, and is added into the anti-seepage wall in mixing construction in steps; the cutting agent is obtained by uniformly mixing 20-50 parts of an anti-seepage component, 3-8 parts of a drag reduction component, 600-800 parts of a low-activity filler component, 5-12 parts of a water-reducing component and 0-150 parts of a dispersing component; the curing agent is obtained by uniformly mixing 50-100 parts of a gelling component, 200-400 parts of a medium-high activity component, 10-20 parts of an exciting component, 2-5 parts of a water-reducing component and 0-2 parts of a defoaming component.

[0024] The anti-seepage component in the curing material is one or more of montmorillonite powder, talcum powder, diatomaceous earth, and expanded perlite powder, with a specific surface area of ​​not less than 800m 2 / kg. The anti-seepage component is composed of powder with large specific surface area, high porosity, water absorption and expansion, high water retention capacity. This component has good cation exchange performance, can adsorb and exchange a variety of cations, and also has enhanced adsorption and fixation of heavy metals in the soil, blocking harmful ion exchange on both sides of the solidified soil anti-seepage wall.

[0025] The drag reduction component in the curing material is composed of 30-50% guar gum and its derivatives, 20-40% PAM and 10-30% hydrogenated styrene polyisoprene. After being dissolved in water, the drag reduction component can reduce the viscosity of the liquid and the viscosity between the cutting fluid molecules, thereby reducing the friction resistance of cutting and stirring and improving the uniformity of stirring; and the drag reduction component can reduce the surface tension of the cutting fluid, making it easier to flow, improving the pipeline pumping capacity, and thus reducing the energy consumption of mechanical construction.

[0026] The low-activity filler component in the solidification material is composed of one or more of stone powder, waste ceramic powder, brick slag powder, fly ash, volcanic ash, and quartz tailings powder, with a 28d activity index of less than 60% and a specific surface area of ​​not less than 500m 2 / kg. This component is composed of low-activity industrial solid waste ground into powder. These materials have low activity, low cost and high proportion, which enhances the density of the solidified soil, improves the mixing uniformity during the cutting process and reduces the overall cost of the solidified material.

[0027] The cementitious component in the solidifying material is composed of 20-40% C2S cement clinker, 60-70% C3S cement clinker and 5-10% hemihydrate gypsum. This component is composed of part of cement clinker and gypsum, and produces a large amount of hydration products in the early stage of hydration, which improves the alkaline environment in the sludge system, provides a hydration reaction start-up basis for the early reaction of solidified soil, enhances the reaction activity of low-activity filler components and medium- and high-activity components, and there is no C3A cement clinker in the composition, which reduces the early hydration heat of cement, reduces the temperature cracks and shrinkage cracks of the solidified soil anti-seepage wall; at the same time, it also improves the anti-erosion ability of the solidifying material.

[0028] The medium and high active components in the curing material are one or more of slag powder, ultrafine kaolin, wollastonite powder, modified mica powder and silica powder, with a 28d activity index greater than 60% and a specific surface area of ​​not less than 400m 2 / kg. This component is composed of medium-high active inorganic powder materials. Under the stimulation of the hydration reaction of the excitation component and the gelling component, a large amount of hydration products can be provided in the middle and late stages of curing (after 7 days of curing). The low-activity filler component can also produce a large amount of hydration products in the late stage (after 28 days of curing) under the stimulation of the excitation component. The gelling component, medium-high active component and low-activity filler component produce hydration products at different hydration times. The strength of the cured soil increases with the increase of age, making the anti-seepage cured soil more compact and more impermeable.

[0029] The water reducing component in the solidifying material adopts one of the melamine series, aliphatic series and naphthalene sulfonate water reducing agents. It is mainly used to reduce the amount of water required for the cutting agent and the curing agent. Under the premise of maintaining the same fluidity, less water is added, and the water-cement ratio is reduced, which also improves the curing strength of the solidified soil anti-seepage wall.

[0030] The dispersed component in the solidifying material is tailings from river and lake dredging, with a fineness modulus of 0.6-2.0 and an average particle size of less than 0.25mm. The dispersed component increases the aggregate proportion of the solidifying material, improves the solidification strength, and the tailings particles are rounded, which increases the uniformity and dispersibility of powder mixing. At the same time, the tailings enhance the particle grading of the solidifying material, making the solidified soil denser, thereby enhancing the porosity of the solidified soil anti-seepage wall and refining the pore size distribution, reducing the transmission channels of harmful ions, and enhancing the resistance to chloride ion and sulfate erosion.

[0031] The exciting component is composed of 50-80% slaked lime, 20-40% sodium carbonate, and 5-10% triethanolamine; it mainly adds a calcium source and an alkaline environment to the soil solidification reaction system, can stimulate the potential activity of solid aluminosilicate, form a material with gelling properties, and activate the activities of medium and high activity components and low activity filler components to generate hydration products with gelling properties, such as CSH gel, CASH gel, etc.

[0032] The defoaming components polysiloxane, special emulsifier and high-activity polyether defoaming agent are polymerized through a process; the main function is to reduce the surface tension of the mixing system of the solidified soil in the later stage, burst the bubbles existing in the mixing system of the solidified soil, reduce the residual amount of gas in the jet mixing construction, make the solidified soil more compact, and further improve the curing strength and impermeability.

[0033] The initial setting time of the cutting agent in the solidifying material is greater than 18 hours, and the initial setting time of the curing agent is 6-9 hours.

[0034] The curing material mass mixing ratio of the solidified soil anti-seepage wall is 8-15%, and the unconfined compressive strength after curing for 28 days is not less than 1MPa, and the permeability coefficient is not greater than 1×10 -7 cm / s. Example

[0035] In order to compare the beneficial effects of the curing material in the present invention, the present invention also provides specific curing examples of different soil types. The curing objects are 5 typical soil samples, and the specific parameters are shown in Table 1. The 5 soils are cured using the curing materials within the specified range of the present invention, and the curing material (cutting agent + curing agent) is added in an amount of 10%. The detailed ratio table is shown in Table 2, and the curing material and curing performance characterization are shown in Table 3.

[0036] Table 1 Performance parameters of each soil sample (%)

[0037] Table 2 Ratio of solidifying materials corresponding to each soil sample (parts)

[0038] Table 3 Test table of curing materials and curing soil performance

[0039] It can be seen from the above embodiments that when the addition ratio of the solidifying material is within a set range, the various properties of the solidifying material and the solidified soil after solidification meet the design requirements. Example

[0040] like Figure 1-7 Based on the solidified materials of Example 1 and Example 2, Example 3 discloses a construction method for a thin equal-thickness solidified soil anti-seepage wall, wherein the arrows in the figure indicate the direction of cutting or solidification mixing, specifically: P1: Arrange the machinery and equipment on site, mark the location of the solidified soil anti-seepage wall to be constructed, and divide the solidified soil anti-seepage wall into multiple sections. At the same time, ensure that the foundation bearing capacity of the solidified soil anti-seepage wall construction machinery station area is higher than 150kpa or the full thickness of the steel plate is not less than 1cm; P2: Excavate a grouting groove with the same width as the solidified soil anti-seepage wall on the surface of the construction anti-seepage wall (see Figure 2 ), the depth of the return slurry groove is determined by calculation, and a slurry overflow port is excavated at one end of the return slurry groove, and the height of the overflow port is not less than 10cm; P3: Dig a pre-buried hole 2 near the starting point of the solidified soil anti-seepage wall. The depth of the pre-buried hole 2 is not less than 2.5m, the length is not less than 1.5m, and the width is not less than 1m. A pre-buried box is embedded in the bottom of the pre-buried hole 2, and then the cutting box 3 is placed into the pre-buried box section by section (see Figure 3 ); P4: The chain slotting machine 1 moves to a position close to the embedded hole 2, and then connects with the single-section cutting box 3 in the embedded hole 2. Then the chain slotting machine 1 is moved to the construction position, the construction verticality is adjusted, and water is injected for vertical cutting. After reaching the single-section cutting depth, the cutting box 3 is lifted, and the next section of the cutting box 3 is connected and cut until the designed cutting depth is met (see Figure 4 ); P5: Mix water and cutting agent evenly according to the water-cement ratio of 1:0.7-1:1.3 to obtain cutting fluid, use the cutting fluid to cut the soil, and use jet construction at the same time; when cutting the soil, use back and forth secondary cutting construction, one cutting (see Figure 5 ) After the construction reaches the end of the single-stage anti-seepage wall, reverse secondary cutting is carried out (see Figure 6 )construction; P6: After the cutting construction of the single-stage anti-seepage wall is completed, water and curing agent are prepared into a curing liquid according to the water-cement ratio of 1:0.4-1:0.6, and a stirring curing is carried out (see Figure 7 ) construction, the solidifying liquid is evenly mixed into the soil containing cutting fluid to form a solidified soil anti-seepage wall of equal thickness; P7: After completing the cutting and mixing solidification construction of a single section of the cut-off wall, repeat steps P5 and P6 to continue the cutting and mixing solidification construction of the next section of the cut-off wall to form a continuous underground cut-off wall of equal thickness solidified soil until the entire construction of this project is completed.

[0041] Furthermore, the depth of the return slurry groove is determined by calculation, and the depth of the return slurry groove is the total slurry height of the cutting fluid and the solidifying fluid injected into the cut-off wall with the same width plus the height of the slurry overflow port multiplied by the surplus coefficient (1.2-1.5).

[0042] Furthermore, the thickness of the solidified soil anti-seepage wall is determined by the width of the cutting box 3. The width of the single-section cutting box 3 after improvement is 250-450 mm, which can meet the requirements for forming a solidified soil anti-seepage wall with a width of 300-500 mm.

[0043] Furthermore, the primary cutting speed is 2-5 m / h, the secondary cutting speed is 8-20 m / h, the length of each section of the anti-seepage wall is preferably 10-20 m, and the stirring and curing speed is 3-8 m / h.

[0044] Furthermore, after the cutting box 3 is pulled out, the cutting box body needs to be rinsed with clean water. When the waiting time after the cutting construction is completed exceeds 15 hours, the cutting box needs to be cleaned. When the waiting time after the curing and mixing construction is completed exceeds 5 hours, the cutting box needs to be cleaned.

[0045] The above description is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. A thin solidifying material for equal thickness solidified soil anti-seepage wall, characterized in that: The curing material comprises 60-80% of a cutting agent and 20-40% of a curing agent, and is added to the anti-seepage wall mixing construction in steps; The cutting agent is obtained by uniformly mixing 20-50 parts of an anti-seepage component, 3-8 parts of a drag reduction component, 600-800 parts of a low-activity filler component, 5-12 parts of a water-reducing component and 0-150 parts of a dispersing component; The curing agent is obtained by mixing 50-100 parts of gelling components, 200-400 parts of medium-high activity components, 10-20 parts of exciting components, 2-5 parts of water reducing components and 0-2 parts of defoaming components.

2. A thin solidifying material for equal thickness solidified soil anti-seepage wall as claimed in claim 1, characterized in that: The anti-seepage component is one or more of montmorillonite powder, talcum powder, diatomaceous earth, and expanded pearlite powder, with a specific surface area of ​​not less than 800m 2 / kg; The drag reduction component consists of 30-50% guar gum and its derivatives, 20-40% PAM and 10-30% hydrogenated styrene polyisoprene.

3. The thin solidified soil anti-seepage wall solidifying material as claimed in claim 1, characterized in that: The low-activity filler component is composed of one or more of stone powder, waste ceramic powder, brick slag powder, fly ash, volcanic ash, and quartz tailing powder, with a 28d activity index of less than 60% and a specific surface area of ​​not less than 500m 2 / kg; The cementitious component is composed of 20-40% C2S cement clinker, 60-70% C3S cement clinker and 5-10% hemihydrate gypsum; The medium and high active components are one or more of slag powder, ultrafine kaolin, wollastonite powder, modified mica powder and silica powder, with a 28d activity index greater than 60% and a specific surface area of ​​not less than 400m 2 / kg.

4. The thin solidified soil anti-seepage wall solidifying material as claimed in claim 1, characterized in that: The water reducing component is one of melamine-based, aliphatic-based and naphthalenesulfonate water reducing agents; The dispersed component is made of tailings dredged from rivers and lakes, with a fineness modulus of 0.6-2.0 and an average particle size of less than 0.25 mm; The exciting component is composed of 50-80% slaked lime, 20-40% sodium carbonate, and 5-10% triethanolamine; The defoaming components polysiloxane, special emulsifier and high-activity polyether defoaming agent are polymerized through a process.

5. A thin solidified soil anti-seepage wall solidified material, characterized in that: The initial setting time of the cutting agent in the solidifying material is greater than 18h, and the initial setting time of the solidifying agent is 6-9h; the mass mixing ratio of the solidifying material for the solidified soil anti-seepage wall is 8-15%, and the unconfined compressive strength after solidification is not less than 1MPa at 28d, and the permeability coefficient is not greater than 1×10 -7 cm / s.

6. A method for constructing a thin and equal-thickness solidified soil anti-seepage wall using the solidified material as claimed in claims 1 to 5, characterized in that: The following steps are involved: P1: Arrange the machinery and equipment on site, mark the location of the solidified soil anti-seepage wall to be constructed, and divide the solidified soil anti-seepage wall into multiple sections. At the same time, ensure that the foundation bearing capacity of the solidified soil anti-seepage wall construction machinery station area is higher than 150kpa or the full thickness of the steel plate is not less than 1cm; P2: A slurry return groove with the same width as the solidified soil slurry return groove is excavated on the surface of the construction slurry return groove. The depth of the slurry return groove is determined by calculation. At the same time, a slurry overflow port is excavated at one end of the slurry return groove. The height of the overflow port is not less than 10 cm; P3: Dig a pre-embedded hole near the starting point of the solidified soil anti-seepage wall. The depth of the pre-embedded hole should be no less than 2.5m, the length should be no less than 1.5m, and the width should be no less than 1m. Put the pre-embedded box in the pre-embedded hole, and then put the cut box into the pre-embedded box section by section. P4: The chain-type slotting machine moves to a position close to the pre-embedded hole, and then connects with the single-section cutting box in the pre-embedded hole. Then the chain-type slotting machine moves to the construction position, adjusts the construction verticality, and injects water for vertical cutting. After reaching the single-section cutting depth, lift the cutting box, connect and cut the next section of the cutting box, until the designed cutting depth is met; P5: Mix water and cutting agent evenly according to the water-cement ratio of 1:0.7-1:1.3 to obtain cutting fluid, use the cutting fluid to cut the soil, and use jet construction at the same time; during soil cutting construction, use reciprocating secondary cutting construction, and after the primary cutting construction reaches the end point of the single-section anti-seepage wall, perform reverse secondary cutting construction; P6: After the cutting construction of the single-stage anti-seepage wall is completed, water and curing agent are prepared into a curing liquid according to a water-cement ratio of 1:0.4-1:0.6, and a stirring and curing construction is carried out to evenly mix the curing liquid into the soil containing the cutting fluid to form a solidified soil anti-seepage wall of equal thickness; P7: After completing the cutting and mixing solidification construction of a single section of the cut-off wall, repeat steps P5 and P6 to continue the cutting and mixing solidification construction of the next section of the cut-off wall to form a continuous underground cut-off wall of equal thickness solidified soil until the entire construction of this project is completed.

7. A method for constructing a solidified soil cut-off wall as claimed in claim 6, characterized in that: The thickness of the solidified soil anti-seepage wall is determined by the width of the cutting box. The width of the improved single-section cutting box is 250-450mm, which can meet the wall construction requirements of a solidified soil anti-seepage wall with a width of 300-500mm.

8. A method for constructing a solidified soil cut-off wall as claimed in claim 6, characterized in that: The primary cutting speed is 2-5 m / h, the secondary cutting speed is 8-20 m / h, the length of each section of the anti-seepage wall is preferably 10-20 m, and the stirring and curing speed is 3-8 m / h.

9. A method for constructing a solidified soil cut-off wall as claimed in claim 6, characterized in that: After the cutting box is pulled out, the cutting box body needs to be rinsed with clean water. When the waiting time after the cutting construction is completed exceeds 15 hours, the cutting box needs to be cleaned. When the waiting time after the curing and mixing construction is completed exceeds 5 hours, the cutting box needs to be cleaned.

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