Method for calculating mix proportion of waste slurry regenerated flow-state solidified soil

Abstract

The invention discloses a method for calculating the mix proportion of waste slurry regenerated flow-state solidified soil, which specifically comprises the following steps of: pre-determining the design density of the flow-state solidified soil; measuring the natural density of the field waste mud, the natural density of the waste residue soil, the water content of the waste mud, the water content of the waste residue soil, the specific gravity of soil particles and the bulk density of the powder curing agent mixture; replacing the mass of the curing agent with the mass of waste residue soil according to the mixing amount of the curing agent; obtaining an expression relationship between the waste mud quality and the waste residue soil quality; and calculating the mass of the corresponding waste mud, the mass of the waste residue soil, the water adding amount and the mass of the curing agent according to the volume of the required flow-state solidified soil and the design density of the flow-state solidified soil. The method for calculating the mix proportion of the waste mud regenerated fluid-state solidified soil is suitable for actual construction, known quantities in calculation can be obtained through field tests, the known quantities are expressed through the properties of the target fluid-state solidified soil, the method is simple and easy to understand, the mass of all components of the fluid-state solidified soil can be rapidly obtained, and material waste in construction is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of the preparation of fluid-solidified soil, and particularly relates to a method for calculating the mix proportion of waste slurry regenerated fluid-solidified soil. Background Art

[0002] In actual projects, the output of waste slurry and waste soil is huge. However, due to their complex material composition and poor physical and mechanical properties, the slurry and waste soil cannot be directly reused in engineering activities, and the costs of long-distance transportation and storage and disposal are high. Most of them are discarded outside the city, which not only has a negative impact on the city and high transportation costs, but also causes a waste of soil resources. Research shows that after necessary treatment, these engineering solid wastes can be recycled and used in engineering construction, thus effectively solving problems such as land occupation, storage and transportation, and environmental pollution, and solving the current dilemmas of shortage of engineering fillers and cost reduction.

[0003] Taking waste soil as the main material, adding cementitious materials and necessary water, and forming a workable mixture, namely fluid-solidified soil, after being evenly mixed, and then pouring it into engineering sites with small space such as backfilling of foundation trenches, backfilling of pipe trenches, and filling of goafs or sites without mechanical operation conditions. After curing, it becomes a new type of engineering material with a dense structure, certain strength, water stability, low permeability and long-term stability. It provides new methods and technologies for the recycling treatment of waste soil engineering solid wastes, thus effectively solving construction problems such as long land occupation, high treatment costs, and long transportation cycles.

[0004] However, at present, the application of fluid-solidified soil in actual construction has few cases, and there is no reference for the mix proportion calculation of fluid-solidified soil prepared from waste soil. Therefore, it is necessary to develop a method for calculating the mix proportion of waste slurry regenerated fluid-solidified soil in this field to effectively solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for calculating the mix proportion of waste slurry regenerated fluid-solidified soil, which is applicable to actual construction. All known quantities in the calculation can be obtained through on-site tests and are represented by the properties of the target fluid-solidified soil. It is simple and easy to understand, and the mass of each component of the fluid-solidified soil can be quickly obtained, avoiding material waste during construction.

[0006] To achieve the above purpose, the present invention provides a method for calculating the mix proportion of waste slurry regenerated fluid-solidified soil, including the calculation of fluid-solidified soil regenerated from the same waste slurry and one, two or three different engineering waste soils; specifically including the following steps,

[0007] S1. Predetermine the design density of the fluid-solidified soil according to the usage scenario;

[0008] S2. Measure the natural density of the on-site waste mud and the natural density of the waste soil, the water content of the waste mud, the water content of the waste soil, the specific gravity of soil particles, and the bulk density of the powder curing agent mixture;

[0009] S3. Replace the mass of the curing agent with the mass of the waste soil according to the curing agent dosage;

[0010] S4. Obtain the expression relationship between the mass of the waste mud and the mass of the waste soil based on the water-binder ratio and the constant total mass before and after mixing;

[0011] S5. Calculate the corresponding mass of the waste mud, the mass of the waste soil, the water addition amount, and the mass of the curing agent according to the required volume of the flowable solidified soil and the designed density of the flowable solidified soil.

[0012] Preferably, in step S2, the curing agent is one of a cement-based curing agent and a soda-activated curing agent, and the curing agent is a dry powder; in step S3, the curing agent dosage is predetermined, and its value is 7-15% of the total dosage; in step S4, the water-binder ratio is a known quantity in the calculation, and its value is 0.9-1.5.

[0013] Preferably, when the natural density of the waste soil is close to the designed density of the flowable solidified soil, a calculation formula for regenerating the flowable solidified soil from the waste mud and a kind of construction waste soil is adopted. Specifically,

[0014] According to the required volume V of the flowable solidified soil 流 Calculate the required mass m of the waste mud 泥浆 , the mass m of the waste soil 湿土 and the mass m of the curing agent 胶 are,

[0015]

[0016] In the formula, m 泥浆 —The mass of the waste mud, unit kg; ω 泥浆 —The water content of the waste mud, Dimensionless; m 水,泥浆 —The mass of water in the waste mud, unit kg; m 干泥 —The mass of the waste mud after drying, unit kg; ρ 流 —The density of the flowable solidified soil, unit kg / m 3 ; V 流 —The volume of the flowable solidified soil, unit m 3 ; m 湿土i —The mass of the i-th type of waste soil, i = 1, 2, 3, unit kg; ω 土i —The water content of the i-th type of waste soil, i = 1, 2, 3, Dimensionless; m 水i —The mass of water in the i-th type of waste soil, i = 1, 2, 3, unit kg; m干土i — The mass of the i-th type of waste soil after drying, where i = 1, 2, 3, unit: kg; m 胶 — The mass of the powder solidifying agent, unit: kg; ψ — The dosage of the solidifying agent, Dimensionless; P — The water-binder ratio, Dimensionless.

[0017] Preferably, when the natural density of the wet soil 1 is less than the designed density of the fluidized solidified soil, another type of waste soil with a natural density greater than the designed density of the fluidized solidified soil is added, denoted as wet soil 2; for specific gravity adjustment, the calculation formula for regenerating the fluidized solidified soil using waste slurry and two types of waste soil is as follows. Specifically,

[0018] According to the required volume V of the fluidized solidified soil 流 Calculate the required mass m of the waste slurry 泥浆 , the mass m of the waste soil 湿土i and the mass m of the solidifying agent 胶 are,

[0019]

[0020] In the formula, a is the mass ratio of wet soil 2 to wet soil 1, denoted as m 湿土2 = a·m 湿土1 ;

[0021]

[0022] Preferably, when the natural density of the wet soil 1 is much less than the designed density of the fluidized solidified soil, two types of waste soil with natural densities close to the designed density of the fluidized solidified soil are added, denoted as wet soil 2 and wet soil 3 respectively, for specific gravity adjustment. At this time, the calculation formula for regenerating the fluidized solidified soil using waste slurry and three types of waste soil is as follows. Specifically,

[0023] According to the required volume V of the fluidized solidified soil 流 Calculate the required mass m of the waste slurry 泥浆 , the mass m of the waste soil 湿土i and the mass m of the solidifying agent 胶 are,

[0024]

[0025] In the formula, a is the mass ratio of wet soil 2 to wet soil 1, b is the mass ratio of wet soil 3 to wet soil 1, denoted as m 湿土2 = a·m 湿土1 and m 湿土3 = b·m 湿土1 ;

[0026]

[0027] In the formula, G s,土i— Relative density of soil particles of the i-th kind of waste soil, i = 1, 2, 3, dimensionless; ρ 湿土i — Density of the i-th kind of waste soil, i = 1, 2, 3, unit kg / m 3 ; n 土i — Porosity of the i-th kind of waste soil, 2, 3, dimensionless; V Vi — Pore volume of the i-th kind of waste soil, i = 1, 2, 3, unit m 3 ; V 土粒i — Volume of soil particles in the i-th kind of natural dry soil, i = 1, 2, 3, unit m 3 ; ρ w — Density of water, unit kg / m 3 .

[0028] Therefore, the above-mentioned calculation method for the mix proportion of recycled fluidized solidified soil from waste slurry of the present invention is applicable to actual construction. All the known quantities in the calculation can be obtained through on-site tests and are represented by the properties of the target fluidized solidified soil. It is simple and easy to understand, and the mass of each component of the fluidized solidified soil can be quickly obtained, avoiding material waste during construction.

[0029] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Description of the Drawings

[0030] Figure 1 It is a flow chart of an embodiment of the calculation method for the mix proportion of recycled fluidized solidified soil from waste slurry of the present invention. Detailed Embodiments

[0031] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0032] Unless otherwise defined, the technical terms or scientific terms used in the present invention should have the ordinary meaning understood by those of ordinary skill in the field to which the present invention belongs.

[0033] As Figure 1 shown, a calculation method for the mix proportion of recycled fluidized solidified soil from waste slurry includes the calculation of recycled fluidized solidified soil from the same waste slurry and one, two or three different kinds of engineering waste soils, and specifically includes the following steps:

[0034] S1. Predetermine the design density of the fluidized solidified soil according to the usage scenario.

[0035] S2. Measure the natural density of the on-site waste slurry and the natural density of the waste soil, the water content of the waste slurry, the water content of the waste soil, the specific gravity of soil particles, and the bulk density of the powder curing agent mixture.

[0036] S3. Replace the mass of the curing agent with the mass of the waste soil through the curing agent dosage.

[0037] S4. Obtain the expression relationship between the mass of waste slurry and the mass of waste soil according to the constant total mass before and after mixing and the water-cement ratio.

[0038] S5. Calculate the corresponding mass of waste slurry, mass of waste soil, water addition amount, and mass of curing agent according to the required volume of fluidized solidified soil and the designed density of fluidized solidified soil.

[0039] The designed density of fluidized solidified soil is a known quantity in the calculation, which is determined according to the actual use scenario. The density ρ of fluidized solidified soil in different engineering applications 流 The value range is referred to as shown in Table 1:

[0040] Table 1 Density ρ of fluidized solidified soil 流 Value range

[0041]

[0042]

[0043] Example 1

[0044] Given waste slurry ρ 泥浆 = 1210 kg / m 3 , water content ω 泥浆 = 0.85. There are several waste soils of the same nature available, with a natural density ρ 湿土1 = 1400 kg / m 3 , water content ω 土1 = 0.31, soil particle specific gravity G s,土1 = 2.73. Add powder curing agent and water according to the admixture ratio ψ = 0.15 and water-cement ratio P = 1.3 to prepare fluidized solidified soil with a density of ρ 流 = 1600 kg / m 3 . Calculate the corresponding mixture ratio design of slurry, waste soil, and curing agent.

[0045] Substitute into the calculation formula of waste slurry and a kind of waste soil regenerated fluidized solidified soil. The mass ratio of preparing fluidized solidified soil with a density of ρ 流 = 1600 kg / m 3 is slurry: waste soil: curing agent = 1: 34.2: 6.7.

[0046] Specifically, when preparing 1 m 3 of fluidized solidified soil, 37.82 kg of slurry, 1293.82 kg of waste soil, and 253.97 kg of curing agent are required.

[0047] Example 2

[0048] Given waste slurry ρ 泥浆= 1210 kg / m 3 , water content ω 泥浆 = 0.85. Now there are two types of muck with different properties, and their physical properties are ρ 湿土1 = 1400 kg / m 3 , water content ω 土1 = 0.31, specific gravity of soil particles G s,土1 = 2.73; ρ 湿土2 = 1940 kg / m 3 , water content ω 土2 = 0.24, specific gravity of soil particles G s,土2 = 2.62; among them, ρ 湿土1 <ρ 流 <ρ 湿土2 , adding a powder curing agent with a bulk density of ρ 胶 = 3020 kg / m 3 and water according to the admixture ratio ψ = 0.15 and water-cement ratio P = 1.3 to prepare a fluidized solidified soil with a density of ρ 流 = 1600 kg / m 3 . Calculate the mix ratio design of the corresponding slurry, two types of muck and the curing agent.

[0049] Substitute into the calculation formula for the regenerated fluidized solidified soil of the two types of muck. Using the above materials to prepare a fluidized solidified soil with a density of ρ 流 = 1600 kg / m 3 , the mass ratio is slurry: muck 1: muck 2: curing agent = 2.9: 3.7: 2.6: 1.

[0050] Specifically, when preparing 1 m 3 of fluidized solidified soil, 370.51 kg of slurry, 474.12 kg of muck 1, 341.32 kg of muck 2 and 128.65 kg of curing agent are required.

[0051] Example 3

[0052] Given that the density of the waste slurry ρ 泥浆 = 1210 kg / m 3 , water content ω 泥浆 = 0.85. Now there are three types of muck with different properties, and their physical properties are ρ 湿土1 = 1400 kg / m 3 , water content ω 土1 = 0.31, specific gravity of soil particles G s,土1 = 2.73; ρ 湿土2 = 1940 kg / m 3 , water content ω 土2 = 0.24, specific gravity of soil particles G s,土2 = 2.62; ρ 湿土3 = 2100 kg / m3 , water content ω 土3 = 0.22, specific gravity of soil particles G s,土3 = 2.70. Add powder solidifying agent with bulk density ρ 胶 = 3020 kg / m 3 and water according to admixture ratio ψ = 0.15 and water-cement ratio P = 1.3 to prepare fluidized solidified soil with density ρ 流 = 1600 kg / m 3 . Calculate the corresponding slurry, three kinds of waste soil and solidifying agent mix proportion design.

[0053] Substitute into the calculation formula of three kinds of waste soil recycled fluidized solidified soil. Prepare fluidized solidified soil with density ρ 流 = 1600 kg / m 3 of the mass ratio of fluidized solidified soil is slurry: waste soil 1: waste soil 2: waste soil 3: solidifying agent = 1.7: 2.9: 2.5: 2.4: 1.

[0054] Specifically, when preparing 1 m 3 of fluidized solidified soil, 259.31 kg of slurry, 438.73 kg of waste soil 1, 376.62 kg of waste soil 2, 371.87 kg of waste soil 3 and 153.46 kg of solidifying agent are needed.

[0055] Therefore, the present invention adopts the above-mentioned calculation method for the mix proportion of recycled fluidized solidified soil from waste slurry, which is applicable to actual construction. All the known quantities in the calculation can be obtained through on-site tests and are represented by the properties of the target fluidized solidified soil. It is simple and easy to understand, and the mass of each component of the fluidized solidified soil can be obtained quickly, avoiding material waste in construction.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that they can still modify or equivalently replace the technical solutions of the present invention, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A method for calculating the mix ratio of waste mud regeneration fluidized solidified soil, characterized in that: It includes the calculation of the same type of waste mud and one, two or three different types of engineering waste soil regeneration fluidized solidified soil; specifically includes the following steps: S1. Determine the design density of fluidized solidified soil in advance according to the usage scenario; S2. Measure the natural density of the waste mud and the waste soil, the moisture content of the waste mud and the waste soil, the specific gravity of the soil particles and the bulk density of the powder curing agent mixture; S3, replacing the mass of the curing agent with the mass of the waste soil by adjusting the curing agent dosage; S4. The expression relationship between the mass of waste mud and the mass of waste soil is obtained based on the water-binder ratio and the constant total mass before and after mixing; S5. Calculate the corresponding waste mud mass, waste slag mass, water addition amount and curing agent mass according to the required volume of fluidized solidified soil and the design density of fluidized solidified soil.

2. The method for calculating the mix ratio of waste mud regeneration fluidized solidified soil according to claim 1 is characterized in that: In step S2, the curing agent is one of a cement-based curing agent and a soda ash-activated curing agent, and the curing agent is a dry powder; in step S3, the curing agent dosage is predetermined, and its value is 7-15% of the total dosage; in step S4, the water-binder ratio is a known quantity in the calculation, and its value is 0.9-1.

5.

3. The method for calculating the mix ratio of waste mud regeneration fluidized solidified soil according to claim 1 is characterized in that: When the natural density of the waste soil is close to the design density of the fluidized solidified soil, the calculation formula for regenerating fluidized solidified soil using waste mud and an engineering waste soil is as follows: Volume of fluidized solidified soil V as required 流 Calculate the required waste mud mass m 泥浆 , waste soil mass m 湿土 and curing agent mass m 胶 for, In the formula, m 泥浆 —The mass of the waste mud, in kg; ω 泥浆 —Water content of waste sludge, dimensionless; m 水,泥浆 —The water content in the waste mud, in kg; m 干泥 —The mass of the waste mud after drying, in kg; ρ 流 —Density of fluidized solidified soil, in kg / m 3 ; V 流 —Volume of fluidized solidified soil, in m 3 ; m 湿土i —The mass of the i-th type of waste soil, i=1, 2, 3, unit: kg; ω 土i —The moisture content of the i-th type of waste soil, i=1, 2, 3, dimensionless; m 水i —The water content of the i-th type of waste soil, i = 1, 2, 3, unit: kg; m 干土i —The mass of the i-th type of waste soil after drying, i = 1, 2, 3, unit: kg; m 胶 —Mass of powder curing agent, in kg; ψ—curing agent dosage, Dimensionless; P—water-binder ratio, Dimensionless.

4. The method for calculating the mix ratio of waste mud regeneration fluidized solidified soil according to claim 1 is characterized in that: When the natural density of wet soil 1 is less than the design density of fluidized solidified soil, another kind of abandoned soil with a natural density greater than the design density of fluidized solidified soil is added, recorded as wet soil 2; the specific gravity is adjusted. At this time, the calculation formula for regenerating fluidized solidified soil using waste mud and two kinds of abandoned soil is as follows: Volume of fluidized solidified soil V as required 流 Calculate the waste mud mass m 泥浆 , waste soil mass m 湿土i and curing agent mass m 胶 for, Where a is the mass ratio of wet soil 2 to wet soil 1, denoted by m 湿土2 =a·m 湿土1 ; 5. The method for calculating the mix ratio of waste mud regeneration fluidized solidified soil according to claim 1 is characterized in that: When the natural density of wet soil 1 is much smaller than the design density of fluidized solidified soil, two kinds of abandoned soil with natural density close to the design density of fluidized solidified soil are added, recorded as wet soil 2 and wet soil 3 respectively, and the specific gravity is adjusted. At this time, the calculation formula for regenerating fluidized solidified soil using waste mud and three kinds of abandoned soil is as follows: Volume of fluidized solidified soil V as required 流 Calculate the waste mud mass m 泥浆 , waste soil mass m 湿土i and curing agent mass m 胶 for, Where a is the mass ratio of wet soil 2 to wet soil 1, and b is the mass ratio of wet soil 3 to wet soil 1, denoted by m 湿土2 =a·m 湿土1 and m 湿土3 = b·m 湿土1 ; In the formula, G s,土i —Relative density of soil particles of the i-th type of waste soil, i = 1, 2, 3, dimensionless; ρ 湿土i —Density of the i-th type of waste soil, i=1, 2, 3, unit: kg / m 3 ;n 土i —Porosity of the i-th type of waste soil, 2, 3, dimensionless; V Vi —Porous volume of the i-th type of waste soil, i=1, 2, 3, unit: m 3 ; V 土粒i —Volume of soil particles in the i-th natural dry soil, i = 1, 2, 3, unit m 3 ; ρ w —Density of water, in kg / m 3 .

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