Flow-state solidified soil mix proportion design method

Abstract

The invention discloses a flow-state solidified soil mix proportion design method and belongs to the field of building materials. According to the invention, calculation is carried out by taking double indexes of fluidity and strength as a core. The mix proportion calculation process is mainly divided into two parts: water consumption calculation and strength calculation. The total water consumption of the fluid-state solidified soil can be determined through two key parameters, namely the liquid limit of the soil and the thickened water consumption of the cementing material (curing agent). The compressive strength of the fluid-state solidified soil is related to the flowing degree of a mixture, the curing age, the type of a cementing material and the mixing amount of the cementing material, and reliable parameters are obtained through experimental reasoning, computational analysis and literature investigation, so that a compressive strength calculation formula of the fluid-state solidified soil is established. And finally, through a volumetric method calculation formula, the proportional relation among all the components of the flow-state solidified soil can be determined, and a universal flow-state solidified soil mix proportion design method is established.

Description

Technical Field

[0001] The invention belongs to the field of building materials. Background Art

[0002] Fluidized solidified soil is a filling material with high fluidity and self-compacting properties formed by using waste soil generated by trench and foundation pit excavation as raw material, adding a certain proportion of curing agent and water, and fully mixing. It can be used as a roadbed material in roadbed engineering, and can also be used for backfilling and foundation reinforcement of various trenches and foundation pits. Fluidized solidified soil has the advantages of high fluidity, self-compacting, environmental protection and sustainability. It not only has a fast construction speed, but also has controllable quality and cost, low safety risks, and a wide range of applications. It is in line with the development path of green environmental protection and waste recycling, and has a broad engineering application space.

[0003] In the 2017 integrated pipeline corridor foundation trench backfill project, my country proposed the concept of "premixed fluidized solidified soil" (abbreviated as "fluidized solidified soil"). Zhou Yongxiang [1] elaborated on the basic properties of fluidized solidified soil in detail and pointed out that fluidized solidified soil is a green building material that can synergistically dispose of a variety of wastes. Gu Huanda [2] proposed to use the mixture 180+20mm and 28d unconfined compressive strength of 80-100kPa as the technical indicators of "fluidized treated soil". Fan Meng [3], Wang Yicheng [4], Huang Rui [5] and others found through experiments that the water-solid ratio can better control the changes in the workability of fluidized solidified soil, while the ash-soil ratio is positively correlated with the strength after hardening. Zhu Yuxing [6] studied the preparation of fluidized solidified soil using shield slag and found that under the conditions of water-solid ratio of 0.5-0.53 and ash ratio of 0.15, its fluidity and strength meet the requirements of pipeline backfill. Zou Peilin [7] prepared fluidized solidified soil using soil excavated during pipeline laying, and tested its fluidity, shrinkage and strength, and obtained the estimated formulas for fluidity and unconfined compressive strength. As cement solidified sludge was poor, Feng Zhongmin [8] added fly ash and phosphogypsum to form a composite solidifying material based on cement as a single cementing material to perform fluidized solidification on sludge, and tested the effects of cement-mud ratio, fly ash-cement, and different curing environment ratios on its strength, deformation capacity and durability.

[0004] In addition to the above-mentioned related research, there are currently a small number of methods for designing the mix proportion of fluidized solidified soil based on different parameters and using calculation formulas. "CN202310656813.5 A mix proportion design method for highly fluidized solidified soil" discloses a mix proportion design method for highly fluidized solidified soil, which determines the critical moisture content of the raw mud for flowability, determines the critical value of the amount of curing agent added to the mud at the critical moisture content, and establishes a prediction formula for the moisture content of fluidized solidified soil, the amount of curing agent and the unconfined compressive strength of the fluidized solidified soil, as well as a prediction formula for the moisture content of fluidized solidified soil, the amount of curing agent and the flow value of fluidized solidified soil; according to the flow value and unconfined compressive strength of the target fluidized solidified soil, the final required moisture content and the amount of curing agent of the target fluidized solidified soil are calculated by the prediction formula; according to the required moisture content and the amount of curing agent, the mix proportion design of raw mud, water and curing agent required for preparing highly fluidized solidified soil is prepared.

[0005] "CN202210936825.9 A fluidized soil mix ratio design method based on density design" discloses a fluidized soil mix ratio design method based on density design, including: determining the design density of the fluidized soil; determining the water-solid ratio of the fluidized soil based on fluidity requirements; determining the cement addition ratio and the curing agent addition ratio of the fluidized soil based on strength requirements; and finally determining the mix ratio of the fluidized soil.

[0006] References:

[0007] [1] Zhou Yongxiang, Wang Jizhong. Principles and engineering application prospects of premixed solidified soil[J]. New Building Materials, 2019, 46(10): 117-120.

[0008] [2] Gu Huanda, Chen Su. Experimental study on fluidization treatment of river silt and its engineering properties[J]. Chinese Journal of Geotechnical Engineering, 2002, (01): 108-111.

[0009] [3] Fan Meng, Zhang Jinxi, Miao Yinghao, et al. Research on performance and engineering application of non-compacted backfill soil [J]. Journal of Highway and Transportation Research and Development (Applied Technology Edition), 2008, 4(S1): 246-250.

[0010] [4] Wang Yicheng. Research on the application of fluidized solidified soil in roadbed engineering[D]. Jilin University, 2021.

[0011] [5] Huang Rui, Liu Guoqiang, Zhu Youzeng, et al. Study on controlled low strength material (CLSM) based on urban pipe jacking waste and factors affecting its performance [J]. Tunnel Construction (Chinese and English), 2021, 41(S2): 346-352.

[0012] [6] Zhu Yuxing, Bian Yi, Min Fanlu, et al. Experimental study on improving subway shield waste soil into fluidized soil[J]. China Civil Engineering Journal, 2020, 53(S1): 245-251.

[0013] [7] Zou Peilin. Experimental study on strength characteristics of fluidized treated soil[D]. Chang'an University, 2016.

[0014] [8] Feng Zhongmin. Indoor experimental study on the flow solidification of seabed mud in Dalian Bay[D]. Hebei University, 2020.

[0015] So far, the mix design of fluidized solidified soil is mostly limited to direct trial mixing before each project, or optimal mixing for a special solidifying agent. Such methods are labor-intensive, highly repetitive, time-consuming and labor-intensive. A small number of methods use reference values ​​such as moisture content and density to design mix ratios through prediction formulas, but they cannot be linked to the properties of the original soil itself, and are less versatile for the complex and diverse soil conditions at engineering sites in various places. In cross-location and cross-engineering project work, a large amount of repetitive trial mixing and exploration work is required.

[0016] Fluidized solidified soil materials are not mature in some engineering fields, and lack official standards and specifications for guidance and reference; the soil types and conditions on site in various places are complex and diverse, and it is difficult to summarize the laws and methods with universal properties. The reason is that the dependence between soil, water and cementitious materials in fluidized solidified soil has not been fundamentally understood, and the correlation between water consumption and the liquid limit of the soil used has not been found. Summary of the invention

[0017] According to the liquid limit of basic geotechnical parameters of different soils and the water consumption of cementitious materials, the water consumption corresponding to the common fluidity of fluidized solidified soil is given, and the curing agent dosage is given according to the relationship between strength and curing agent dosage. Finally, the dosage of each material is solved simultaneously based on the conventional volumetric mix ratio calculation formula. The mix ratio of fluidized solidified soil can be determined with a small amount of test. This method is applicable to different types of soil and has strong versatility.

[0018] To solve the above problems, the technical solution adopted by the present invention is:

[0019] The calculation is based on the dual indicators of fluidity and strength. The mix proportion calculation process is mainly divided into two parts: water consumption calculation and strength calculation. The total water consumption of fluidized solidified soil can be determined by the two key parameters of the liquid limit of the soil and the standard viscosity water consumption of the cementitious material (solidifier). The compressive strength of fluidized solidified soil is related to the fluidity of the mixture, the curing age, the type of cementitious material and its dosage. Reliable parameters are obtained through experimental reasoning, calculation analysis and literature research, so as to establish a calculation formula for the compressive strength of fluidized solidified soil. Finally, the volumetric calculation formula can be used to determine the proportional relationship between the components of fluidized solidified soil, establish a general mix proportion design method for fluidized solidified soil, and the relevant key parameters can be obtained through a small number of benchmark tests and calculations.

[0020] 1. Specific calculation process of mix ratio

[0021] (1) Amount of water used for mud (a mixture of soil and water is called mud)

[0022] The liquid limit moisture content of soil is a characteristic parameter that characterizes the flow state of the soil and can reflect the characteristics of the soil. The amount of water required to make the mud reach a certain flow extension L can be its liquid limit moisture content ω L (In this study, the value before the percentage sign is used for inference calculation. For example, if the liquid limit is 30%, then ω L The value is 30, and the same applies below), which is called the liquid limit ratio and is set to k 1 , through the parameter k 1 And soil sample liquid limit ω L To establish the slurry water consumption W 1 And soil particle weight M S Relationship:

[0023]

[0024] (2) Water consumption of adhesive slurry (adhesive slurry is a mixture of cementitious material and water, which can be understood as pure slurry)

[0025] The standard consistency water consumption of cement refers to the ratio of the water consumption to the mass of cement when the cement paste reaches the standard consistency. The standard consistency water consumption can reflect the water demand characteristics of cement and can be measured by standard methods. This concept is extended to general cementitious materials in this paper. It is considered that the water consumption required for the cement paste to reach a certain flow expansion L is a multiple of the standard consistency water consumption P of the cementitious material. This is called the standard consistency water consumption ratio and is set to k. 2 . By parameter k 2 The water consumption of the cementitious material P is used to establish the water consumption of the cementitious material slurry W. 2 and cementitious material quality M B Relationship:

[0026]

[0027] (3) Total water consumption

[0028] The water consumption of mud and adhesive slurry is combined into the total water consumption:

[0029] W=W 1 +W 2 ………………(3)

[0030] Due to the mutual influence of the soil particles and the particle size distribution of the cementitious material, the actual water consumption W of the fluidized solidified soil mixture to reach a certain fluidity is different from the corresponding water consumption W calculated by separately calculating the soil particles and the cementitious material. 1 , W 2 The water consumption W obtained by adding up will have a small deviation. Tests have shown that within the conventional cementitious material dosage of fluidized solidified soil (5%-15%) and the fluid expansion range that is convenient for construction (200mm-250mm), the actual water consumption W of fluidized solidified soil is 实 The ratio of the water consumption of the two pastes to the sum of W is in the range of 0.96-1.04. Due to the small error, this deviation value is not considered in the process of studying the macro concept of fluidized solidified soil mix design in this paper.

[0031] (4) Amount of cementitious material

[0032] Determine the parameter k by experiment 3 The value of can establish the relationship between the unconfined compressive strength Q and the cementitious material dosage:

[0033]

[0034] (5) Volumetric mix ratio formula:

[0035] In the formula, ρ S The dry density of soil particles is measured according to the actual value (the conventional value is 1400~1700kg / m 3 ), ρ W is the water density, take 1000kg / m 3 , ρ B If it is ordinary Portland cement density, take 3100 ~ 3200kg / m 3 Or other cementitious materials use the measured value, and the air volume of ordinary fluidized solidified soil materials without adding air entraining agent or taking any air-entraining method is V A =1%, then the volumetric mix ratio formula is used to establish a relationship between the mass of soil particles, cementitious materials and the total water consumption:

[0036]

[0037] The above is a complete fluidized solidification soil mix ratio design system. By jointly solving the determined parameters, the required mass of each amount of fluidized solidification soil can be obtained, which can be used in engineering to make more accurate fluidized solidification soil preparation.

[0038] 2. Parameter acquisition

[0039] In the mix design of fluidized solidified soil, the amount of water, the amount of cementitious materials, etc. can be quantitatively determined by formula calculation. 1 , water consumption ratio for standard viscosity k 2 And the k in the relationship between unconfined compressive strength and cementitious material content 3 The value of key parameters such as k can be obtained through a certain amount of reliable regularity experiments. 1～3 The acquisition of parameters can provide a basis for the accurate and convenient mix design of the subsequent fluidized solidified soil. The following is the method for obtaining the values ​​of each parameter:

[0040] k 1 Calculation method:

[0041] From equations (8), (9), and (10), we can get:

[0042]

[0043] k 2 Calculation method:

[0044] From equations (11) and (12), we can get:

[0045]

[0046] k 3 Value:

[0047] It is necessary to conduct 3 to 5 tests of varying the amount of cementitious material to obtain the k value for different fluidities, different ages and different cementitious materials. 3 The value of will increase or decrease to varying degrees.

[0048] 3. Result processing

[0049] According to the results calculated in the mix design steps, it can be verified by the following calculations that for the same engineering indicators - fluidity and strength, there will be an error of about 5% in the material dosage. Since the test has shown that the water-solid ratio is proportional to the fluidity expansion, and the unconfined compressive strength is proportional to the amount of cementitious material, and there is a good linear relationship, in actual engineering, the situation where the theoretical calculation meets the standard but the actual material still does not meet the requirements can be corrected by making slight adjustments to the two indicators of water-solid ratio and cementitious material dosage.

[0050] This method can not only greatly reduce the trial mixing work in the early stage of construction, but also is applicable to a variety of soil conditions and has universal applicability. The specific parameter acquisition process is shown in the following test plan.

[0051] Beneficial effects of the present invention:

[0052] (1) It avoids a lot of trial mixing work in the early stage of the project. For materials with known parameters, a more accurate mix ratio can be obtained with a smaller amount of test, saving materials, time and energy and improving work efficiency.

[0053] (2) Since the geotechnical parameters are linked to engineering indicators in the present invention, the calculation method has a certain universality. It is not only applicable to a certain type of soil, but also has a certain reference for soil samples of different properties, which is greatly beneficial to the promotion and application of fluidized solidified soil materials in different regions and different scenarios.

[0054] (3) The results reveal the good regularity of some material properties of soil samples, which has reference value for the research of soil materials and fluidized solidified soil materials.

[0055] The present invention has determined a relatively complete set of fluidized solidification soil mix ratio design formula calculation method through multiple groups of experimental research and comparison. Through this method, the water consumption, cementitious material dosage, etc. of fluidized solidification soil in actual engineering can be quantitatively analyzed and calculated, and finally a relatively accurate material ratio can be obtained. Some key parameters can be obtained through specific reasoning and calculation, while some parameters can be obtained through certain regularity tests.

[0056] The present invention simulates and summarizes the relationship between the liquid limit value and the flow expansion degree of different liquid and plastic limit soil samples, which can well reflect the water consumption of soils with different properties, and associates the engineering properties with the original soil parameters. It has a certain reference value for soils with different properties in different regions and has a certain versatility. At the same time, the standard viscosity water consumption test method is extended to commonly used cementitious materials, so that the fluidized solidified soil can also be referenced based on this method when using different cementitious materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 Preparation and performance testing of fluidized solidified soil

[0058] Figure 2 Schematic diagram of the flow chart of mix design of fluidized solidified soil

[0059] Figure 3 Fluidized solidified soil and its mix proportion conceptual model

[0060] Figure 4 Raw materials used in the test (a) soil sample S (b) stone dust ST (c) cement OPC (d) fly ash FA

[0061] Figure 5 XRD pattern of raw materials

[0062] Figure 6 Relationship between liquid limit ratio and flow extension of different types of soil samples (a) T10 (b) T7 (c) T5 (d) T3

[0063] Figure 7 Relationship between soil sample liquid limit and key parameters of fitting equation

[0064] Figure 8 Relationship between the water consumption ratio of cementitious materials and flow expansion (a) G1 (b) G2 (c) G3

[0065] Fig. 9 Relationship between standard viscosity water consumption and key parameters of fitting equation

[0066] Fig.10 Relationship between cementitious material dosage and strength DETAILED DESCRIPTION

[0067] In the process of forming this mix design concept, some parameters and rules are proposed from the following test methods: In this design research process, different soil samples are simulated by mixing different proportions of soil samples with stone chips, and cement and fly ash are used to prepare curing agents in different proportions. On the one hand, the relationship between strength and curing agent dosage is sought, and on the other hand, the relationship between material water consumption and flow expansion is sought. Finally, a prediction formula is obtained, the change rules of different soil samples are summarized, and the geotechnical parameters of soil samples are linked to engineering indicators to form a calculation method for the mix ratio of fluidized solidified soil through material parameters. The test process is as follows:

[0068] The test soil is engineering excavation soil S, the main body of which is Yunnan red soil, which comes from Chuxiong City, Yunnan Province, and is dark red ( Figure 4 a), pre-treated, and passed through a 2.36 mm aggregate sieve. The particle distribution is shown in Table 1. Stone chips ST also came from Chuxiong City, Yunnan Province ( Figure 4 b) is used to mix with excavated soil to simulate test soil samples with different properties. It is pre-treated and passed through a 2.36mm aggregate sieve. The cementitious material is P·O42.5 cement ( Figure 4 c) and Class I fly ash ( Figure 4 d), the particle size of the raw materials was analyzed by laser particle size analyzer (Table 2); the chemical composition of all materials was analyzed by XRF, and the results are shown in Table 3; the mineral composition of the materials was analyzed by XRD (see Table 3). Figure 5 ).

[0069] Table 1 Soil particle analysis

[0070]

[0071] Table 2 Particle size distribution of raw materials

[0072]

[0073] Table 3 Chemical composition of raw materials

[0074]

[0075] The fluidity test of mud and fluidized solidified soil during the test process adopts the same test method, and is carried out according to the ASTM D 6103 standard method using a cylindrical cylinder with an inner diameter of 75mm and a height of 150mm. The fluidity test of cementitious materials refers to GB / T8077-2012 "Test method for homogeneity of concrete admixtures", the standard consistency water content test refers to GBT1346-2011 "Test method for water content, setting time and stability of cement standard consistency", and the strength test refers to GB / T 17671-1999 "Test method for strength of cement mortar (ISO method)" for unconfined compressive strength test.

[0076] (1) Soil particle pattern

[0077] Liquid limit ratio k 1 It is related to the fluidity L. In order to explore k 1 The relationship between the fluidity L and the fluidity L is considered, and the applicability of soils with different liquid limit values ​​is considered. In this paper, four soil samples are prepared according to different soil particle to stone chip ratios: T10, T7, T5, and T3. The soil to stone chip ratios are 10:0, 7:3, 5:5, and 3:7, respectively. The flow extension tests of the slurries with different soil samples are carried out as shown in Table 4, and the results are as follows: Figure 6 Liquid limit ratio k of different types of soil materials 1 Relationship with flow extension L.

[0078] Table 4 Corresponding relationship between liquid limit ratio and flow extension of different types of soil samples

[0079]

[0080]

[0081] Depend on Figure 6 It can be seen that the fluidity of the mud has a good linear relationship with the liquid limit ratio, and it can be seen that the smaller the liquid limit value of the soil sample, the smaller the absolute value of the slope and intercept of the linear equation.

[0082] Let the slope of the linear equation be a 1 , the absolute value of the intercept is set to b 1 , then the relationship between flow extension and liquid limit ratio is:

[0083] L = a 1 k 1 -b 1 ………………(8)

[0084] Table 5 Relationship between different soil liquid limits and key parameters

[0085]

[0086] The relationship between the slope and intercept of the equation and the liquid limit is established respectively, such as Figure 7 :

[0087] According to the fitting situation in the figure, after rounding some parameters, we can get:

[0088] a 1 =25ω L +132………………(9)

[0089] b 1 =20ω L +271………………(10)

[0090] Combining the above three equations, the liquid limit value of soil ω L And the required flow expansion L value, the liquid limit ratio k is obtained 1 , and then calculate the water consumption W 1 .

[0091] (2) Curing agent rules

[0092] Similarly, k 2 Related to the fluidity L, in order to explore k 2 The relationship between the fluidity L and the water content of cementitious materials with different standard viscosity is considered. In this paper, fly ash is replaced with cement in different proportions to prepare three types of cementitious materials: G1, G2, and G3. The fly ash replacement ratios are 0%, 25%, and 50%, respectively. The flow expansion test of different cementitious materials is carried out as shown in Table 6, and the water content ratio k of different types of cementitious materials with different standard viscosity is obtained. 2 The relationship between the standard viscosity water consumption ratio k can be obtained by regression fitting of the functional relationship. 2 The corresponding relationship between the standard water consumption P of the cementitious material and the relationship between the standard water consumption ratio and the flow expansion degree are obtained respectively ( Figure 8 ).

[0093] Table 6 Corresponding relationship between water consumption ratio and flow expansion of different types of cementitious materials

[0094]

[0095]

[0096] Will Figure 8 The average slope value is set to a 2 , the intercept value is taken as the average value of 138, then the relationship between the flow expansion and the standard viscosity water consumption ratio is:

[0097] L = a 2 k 2 -138………………(11)

[0098] Table 7 Relationship between standard viscosity water consumption and key parameters of different cementitious materials

[0099]

[0100] The amount of water used to thicken the cementitious material is 2 Fitting the relationship ( Fig. 9 ), after rounding the parameters, we get:

[0101] a 2 =-13P+545………………(12)

[0102] Combining the above formula, the standard water consumption ratio k can be calculated from the standard water consumption P of the cementitious material and the required L value. 2 , and then calculate the water consumption W 2 .

[0103] (3) Intensity law

[0104] For a certain material, the calculation formula of the compressive strength of fluidized solidified soil can be expressed by the above formula (4). Where Q is the unconfined compressive strength value of fluidized solidified soil, k 3 The parameter values ​​affected by factors such as fluidity and cementitious materials have a large degree of irregularity.

[0105] The compressive strength of fluidized solidified soil is almost linearly related to the amount of cementitious material added. Table 8 shows a series of data obtained by using soil sample T10 and cementitious material G1 to differentiate the amount of cementitious material added at a flow expansion of 220±10mm:

[0106] Table 8 Relationship between cementitious material dosage and compressive strength of fluidized solidified soil

[0107]

[0108] The data in Table 8 are transformed into a scatter plot and fitted to obtain Fig.10 In the figure, the cementitious material content is the horizontal axis and the unconfined compressive strength is the vertical axis. It can be seen that the compressive strength at each age is approximately linearly related to the cement content. 2 All of them are greater than 0.95, and the fitting effect is very ideal, indicating that the strength of fluidized solidified soil can be controlled by the amount of cementitious materials. In all cases where the age and fluidity are determined, the parameter k can be obtained based on 3-5 necessary tests. 3 (According to conventional standards, the 28d strength is usually calculated, and its intercept can be ignored)

[0109] (4) Calculation verification.

[0110] The mix design method and process are verified according to the test results.

[0111] According to the test results in Table 8 above, the fluidity is 220±10mm, and the dosage is 14%, which can be calculated as Q=3.01MPa, and the soil liquid limit ω L =31.6, water consumption for cementitious materials P =26.4, water density ρ w Take 1000kg / m3, cement density ρ B Take 3100kg / m3, soil dry density ρ S Take =1500kg / m3.

[0112] like Fig.10 The results show that the limited fluidity is 220±10mm and the age is 28d, then k 3 Take 1.90. According to formula (9), (10), (12), substitute ω L =31.6, P = 26.4, we can get a 1 =922, b 1 =903, a 2 =201.8; Substituting the above results and L=220 into formulas (8) and (11), we get k 1 =1.22, k 2 =1.77; Substituting into formula (1) and (2), we get W 1 =1.22×31.6M S / 100, W 2 =1.77×26.4M B / 100; now all necessary parameters are known.

[0113] The mix design method in this paper yields:

[0114] W 1 =1.22×31.6M S / 100

[0115] W 2 =1.77×26.4Mv / 100

[0116] W=W 1 +W 2

[0117] M B / M S =0.14

[0118] M S / 1500+M B / 3100+W / 1000=0.99

[0119] The combined solution is:

[0120] M S =853.4kg

[0121] M B =119.5kg

[0122] W=329.0+55.8=384.8kg

[0123] That is, soil material: cementitious material: water = 7.14:1:3.22

[0124] That is, the calculated water-to-solid ratio is 0.400, and the actual water-to-solid ratio in the test is 0.422, with an error of 5.2% of the actual value.

[0125] The calculated results are very close to the material dosage and water-solid ratio in the measured data and can be used as a more accurate mix design range.

[0126] (5) Conclusion

[0127] The above method is a specific implementation scheme of the present invention, that is, when the limit of engineering soil liquid, the water consumption of curing agent for standard viscosity, the linear relationship between curing agent dosage and strength, and the calibration of fluidity and required strength are known, a relatively accurate fluidized solidified soil mix ratio can be given. A fluidized solidified soil mix ratio design method based on the dual indicators of strength and fluidity expansion is formed, which is applicable to soil samples of different properties and has important significance for the promotion of fluidized solidified soil materials.

Claims

1. A method for designing a mix ratio of fluidized solidified soil, characterized in that: The following steps are involved:

1. Specific calculation of mix ratio (1) The amount of water used in mud. The mixture of soil and water is called mud; The liquid limit moisture content of soil is a characteristic parameter that characterizes the flow state of the soil. The amount of water required to make the mud reach a certain flow extension L is its liquid limit moisture content ω L A multiple of the value is called the liquid limit ratio here and is set to k1. The parameter k1 and the liquid limit water content ω L To establish the mud water volume W1 and soil particle weight M S Relationship: (2) Water consumption of adhesive slurry, which is a mixture of cementitious material and water, also called neat slurry; The water consumption of cement standard consistency refers to the ratio of the water consumption when cement paste reaches the standard consistency to the mass of cement. This concept is extended to other cementitious materials. It is considered that the water consumption required for cement paste to reach a certain flow extension L is a multiple of the water consumption P of the cementitious material at the standard consistency. This is called the water consumption ratio of the standard consistency and is set as k2. The relationship between the water consumption of cement paste W2 and the mass of cementitious material M is established by using the parameter k2 and the water consumption P of the cementitious material at the standard consistency. B Relationship: (3) Total water consumption The water consumption of mud and adhesive slurry is combined into the total water consumption: W=W1+W2………………(3) (4) Amount of cementitious material The value of parameter k3 is determined through experiments, and the relationship between the unconfined compressive strength Q and the cementitious material dosage is established: (5) Volumetric mix ratio formula: In the formula, ρ S is the dry density of soil particles according to the measured value, ρ W is the water density, take 1000kg / m 3 , ρ B If it is ordinary Portland cement density, take 3100 ~ 3200kg / m 3 ; If other cementitious materials use the measured value, V A Take 1% and relate the mass of soil particles and cementitious materials to the total water consumption: The above is a complete fluidized solidification soil mix design system. When all parameters are determined, the required mass of each amount of fluidized solidification soil can be obtained by joint solution.

2. Parameter acquisition In the mix design of fluidized solidified soil, the amount of water and the amount of cementitious material are quantitatively determined through formula calculation, and the parameter values ​​involved are calculated according to the following method. k 1 Calculation method: From equations (8), (9), and (10), we can get: k2 calculation method: From equations (11) and (12), we can get: k3 value: More than 3 sets of tests are required to obtain it.

2. The method according to claim 1, characterized in that If there are errors in actual projects, they can be corrected through the water-to-solid ratio or the amount of cementitious material added.

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