High-temperature and high-ice-content steel fiber foundation cement soil and preparation method thereof

Abstract

The invention discloses high-temperature and high-ice-content steel fiber foundation cement soil and a preparation method thereof. The preparation method comprises the following steps: S1, preparing simulated high-temperature and high-ice-content frozen soil from soil particles and ice particles; s2, adding steel fibers into the simulated high-temperature and high-ice-content frozen soil, and uniformly mixing to obtain a mixture I; s3, adding cement into the mixture I, uniformly mixing, and standing at-1 DEG C to obtain a mixture II; and S4, liquid water is added into the second mixture, uniform mixing is conducted, and the high-temperature and high-ice-content steel fiber foundation cement soil is obtained. The dry soil, the ice sand, the cement, the steel fiber and the liquid water are mixed, and the mechanical property of the high-temperature and high-ice-content steel fiber foundation cement soil is improved through the optimized feeding sequence and process.

Description

Technical Field

[0001] The invention relates to the technical field of civil engineering, and in particular to a high-temperature-high-ice-content steel fiber foundation cement soil and a preparation method thereof. Background Art

[0002] High-temperature, high-ice-content frozen soil refers to frozen soil with a temperature range of 0℃-1.5℃ and a volumetric ice content of more than 25%. High-temperature, high-ice-content frozen soil has high compression characteristics. Under the influence of climate change and train vibration heat transfer, the melting of ice crystals will cause the frozen soil roadbed to undergo a large melting and sinking deformation, resulting in an uneven road surface and unsafe train travel. In addition, in addition to high-temperature melting and sinking deformation, the high-temperature frozen soil foundation will also freeze the unfrozen water inside the frozen soil due to the decrease in temperature. The high-temperature frozen soil foundation will undergo frost heave deformation, which will also seriously threaten the comfort and safety of driving.

[0003] Existing studies have shown that after cement is added to high-temperature, high-ice-content frozen soil, the cement can effectively combine with the unfrozen water in the high-temperature, high-ice-content frozen soil. In addition, the hydration reaction of cement releases heat to continue to melt the ice inside the frozen soil, and the water from the melted ice continues to combine with cement, finally forming cement soil, which can greatly improve the stability of the frozen soil roadbed. However, in the preparation process of high-temperature frozen soil, the thermal conductivity of cement and high-temperature frozen soil is weak, and the heat generated by the hydration reaction cannot be transmitted to melt all the ice inside the frozen soil, which makes it easy for the cement to agglomerate, resulting in insufficient hydration reaction.

[0004] Waste tires are one of the sources of environmental pollution. Waste tires are composed of rubber and steel fibers. Existing studies have shown that steel fibers, as good conductors, can effectively inhibit the frost heave of soil. Reusing waste tire steel fibers is conducive to energy conservation and emission reduction and responds to national calls.

[0005] The research focus of this invention is how to reasonably add steel fibers to the high-temperature frozen soil mixing process and explore high-temperature-high ice content steel fiber cement soil and its preparation method, which can ultimately respond to the national call for energy conservation and emission reduction, turning waste into treasure, and improve the stability of high-temperature and high-ice content frozen soil roadbed (improve hydration efficiency and the ability of frozen soil roadbed to resist frost heave). Summary of the invention

[0006] In view of the above problems, the present invention aims to provide a high temperature-high ice content steel fiber foundation cement soil and a preparation method thereof.

[0007] The technical solution of the present invention is as follows:

[0008] On the one hand, a method for preparing high temperature-high ice content steel fiber foundation cement soil is provided, comprising the following steps:

[0009] S1: Soil particles and ice particles are used to prepare simulated high temperature and high ice content frozen soil;

[0010] S2: adding steel fiber to the simulated high temperature-high ice content frozen soil and mixing evenly to obtain mixture 1;

[0011] S3: adding cement to the mixture 1, mixing evenly, and standing at -1°C to obtain a mixture 2;

[0012] S4: Add liquid water to the mixture 2 and mix them evenly to obtain high temperature-high ice content steel fiber foundation cement soil.

[0013] Preferably, in step S1, the simulated high temperature-high ice content frozen soil is prepared by the following steps: obtaining soil particles and ice particles, and mixing the soil particles and the ice particles evenly, and then storing them at -1°C for 24 hours to obtain the simulated high temperature-high ice content frozen soil.

[0014] Preferably, the soil particles are clay particles with a particle size less than 2 mm, and the ice particles have a particle size less than 2 mm.

[0015] Preferably, the mass of the ice particles accounts for 30% of the mass of the soil particles.

[0016] Preferably, in step S2, the steel fiber is copper-plated microfilament steel fiber.

[0017] Preferably, the length and diameter of the steel fiber are 13 mm and 0.3 mm respectively.

[0018] Preferably, in step S3, the cement is sulphoaluminate cement.

[0019] Preferably, in step S3, the standing time is 0.5 h.

[0020] Preferably, in step S2, the mass of the steel fiber is 0.75% of the mass of the soil particles; in step S3, the mass of the cement is 10% of the mass of the soil particles; in step S4, the mass of the water is 10% of the mass of the soil particles.

[0021] On the other hand, a high-temperature-high-ice-content steel fiber foundation cement soil is provided, which is prepared by using any one of the above-mentioned methods for preparing the high-temperature-high-ice-content steel fiber foundation cement soil.

[0022] The beneficial effects of the present invention are:

[0023] The present invention firstly adds steel fibers to simulated high-temperature-high-ice-content frozen soil. The addition of steel fibers can improve the thermal conductivity of soil particles and ice particles, which is beneficial to the heat conduction of the subsequent hydration reaction. Then, cement is added and mixed and allowed to stand for 0.5 hours at -1°C. Increasing the standing time can make the heat released by the hydration reaction melt the ice particles and make the hydration reaction more complete. Finally, a proper amount of liquid water is added. The addition of liquid water can make up for the cement that is not fully hydrated in the mixture and increase the bonding force between soil particles. In summary, the high-temperature-high-ice-content steel fiber foundation cement soil obtained by the present invention has higher compressive strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 This is a schematic diagram of the preparation process of high temperature-high ice content steel fiber foundation cement soil in Example 1;

[0026] Figure 2 It is a schematic diagram of the preparation process of high temperature and high ice content steel fiber foundation cement soil in comparative example 1;

[0027] Figure 3 It is a schematic diagram of the preparation process of high temperature-high ice content steel fiber foundation cement soil in comparative example 2;

[0028] Figure 4 It is a schematic diagram of the preparation process of high temperature-high ice content steel fiber foundation cement soil in comparative example 3;

[0029] Figure 5 It is a schematic diagram of the preparation process of high temperature-high ice content steel fiber foundation cement soil in comparative example 4;

[0030] Figure 6 It is a schematic diagram of the preparation process of high temperature-high ice content steel fiber foundation cement soil in comparative example 5;

[0031] Figure 7 It is a schematic diagram of the preparation process of high temperature-high ice content steel fiber foundation cement soil in comparative example 6;

[0032] Figure 8 It is a schematic diagram of the preparation process of high temperature-high ice content steel fiber foundation cement soil in comparative example 7;

[0033] Fig. 9 It is a schematic diagram of the preparation process of high temperature-high ice content steel fiber foundation cement soil in comparative example 8;

[0034] Fig.10 It is a schematic diagram of the preparation process of high temperature-high ice content steel fiber foundation cement soil in comparative example 9;

[0035] Fig.11 It is a schematic diagram of the unconfined compressive strength test results of high temperature and high ice content steel fiber foundation cement soil of Example 1 and Comparative Examples 1-9. DETAILED DESCRIPTION

[0036] The present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, in the absence of conflict, the embodiments in this application and the technical features in the embodiments can be combined with each other. It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as those generally understood by those of ordinary skill in the art to which this application belongs. The words "including" or "comprising" and the like used in the disclosure of the present invention mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0037] In one aspect, the present invention provides a method for preparing high temperature-high ice content steel fiber foundation cement soil, comprising the following steps:

[0038] S1: Soil particles and ice particles are used to prepare simulated high temperature and high ice content frozen soil.

[0039] In a specific embodiment, the simulated high temperature-high ice content frozen soil is prepared by the following steps: obtaining soil particles and ice particles, and mixing the soil particles and the ice particles evenly, and then storing them at -1°C for 24 hours to obtain the simulated high temperature-high ice content frozen soil.

[0040] In the above embodiment, the present invention can simulate the state of high temperature and high ice content frozen soil after crushing in the wild by keeping it at -1°C for 24 hours, so that the product obtained by the present invention is more in line with actual working conditions.

[0041] In a specific embodiment, the soil particles are clay particles with a particle size less than 2 mm, and the ice particles have a particle size less than 2 mm.

[0042] S2: adding steel fiber to the simulated high temperature-high ice content frozen soil, mixing evenly, and obtaining mixture 1.

[0043] In a specific embodiment, the steel fiber is copper-plated microfilament steel fiber; optionally, the length and diameter of the steel fiber are 13 mm and 0.3 mm respectively.

[0044] S3: Add cement to the mixture 1, mix evenly, and let it stand at -1°C to obtain mixture 2.

[0045] In a specific embodiment, the cement is sulphoaluminate cement; and the standing time is 0.5h.

[0046] S4: Add liquid water to the mixture 2 and mix them evenly to obtain high temperature-high ice content steel fiber foundation cement soil.

[0047] In a specific embodiment, in step S1, the mass of the ice particles is 30% of the mass of the soil particles; in step S2, the mass of the steel fibers is 0.75% of the mass of the soil particles; in step S3, the mass of the cement is 10% of the mass of the soil particles; in step S4, the mass of the water is 10% of the mass of the soil particles.

[0048] On the other hand, the present invention also provides a high-temperature-high-ice-content steel fiber foundation cement soil prepared by any of the above-mentioned methods for preparing high-temperature-high-ice-content steel fiber foundation cement soil.

[0049] Example 1

[0050] like Figure 1 As shown, a high temperature-high ice content steel fiber foundation cement soil is prepared by the following steps:

[0051] (1) drying, crushing and screening the soil particles to obtain clay particles with a particle size of less than 2 mm;

[0052] (2) crushing and screening the ice to obtain ice particles with a particle size of less than 2 mm;

[0053] (3) mixing the soil particles and the ice particles evenly (the ice particle content is 30% of the mass of the soil particles), and then storing them at -1°C for 24 hours to obtain simulated high temperature-high ice content frozen soil;

[0054] (4) adding copper-plated microfilament steel fibers (the amount of the steel fibers is 0.75% of the mass of the soil particles) with a length and a diameter of 13 mm and 0.3 mm, respectively, to the simulated high temperature-high ice content frozen soil, and mixing the mixture evenly to obtain a mixture 1;

[0055] (5) adding sulphoaluminate cement (cement ratio is 10% of the mass of soil particles) to the mixture 1, mixing evenly, and standing at -1°C to obtain a mixture 2;

[0056] (6) Add liquid water (the amount of liquid water is 10% of the mass of the soil particles) to the second mixture, mix well, and obtain a high-temperature-high-ice content steel fiber foundation cement soil.

[0057] Comparative Example 1

[0058] like Figure 2 As shown, a high temperature-high ice content steel fiber foundation cement soil is prepared by the following steps:

[0059] (1) drying, crushing and screening the soil particles to obtain clay particles with a particle size of less than 2 mm;

[0060] (2) crushing and screening the ice to obtain ice particles with a particle size of less than 2 mm;

[0061] (3) mixing the soil particles and the ice particles evenly (the ice particle content is 30% of the mass of the soil particles), and then storing them at -1°C for 24 hours to obtain simulated high temperature-high ice content frozen soil;

[0062] (4) adding sulphoaluminate cement (cement parameter is 10% of the mass of soil particles) to the simulated high temperature-high ice content frozen soil, mixing evenly, and obtaining mixture 1;

[0063] (5) adding copper-plated microfilament steel fibers (the amount of the steel fibers is 0.75% of the mass of the soil particles) with a length and a diameter of 13 mm and 0.3 mm, respectively, to the mixture 1, mixing evenly, and standing at -1°C to obtain a mixture 2;

[0064] (6) Add liquid water (the amount of liquid water is 10% of the mass of the soil particles) to the second mixture, mix well, and obtain a high-temperature-high-ice content steel fiber foundation cement soil.

[0065] Comparative Example 2

[0066] like Figure 3 As shown, a high temperature-high ice content steel fiber foundation cement soil is prepared by the following steps:

[0067] (1) drying, crushing and screening the soil particles to obtain clay particles with a particle size of less than 2 mm;

[0068] (2) crushing and screening the ice to obtain ice particles with a particle size of less than 2 mm;

[0069] (3) mixing the soil particles and the ice particles evenly (the ice particle content is 30% of the mass of the soil particles), and then storing them at -1°C for 24 hours to obtain simulated high temperature-high ice content frozen soil;

[0070] (4) adding copper-plated microfilament steel fibers (the amount of the steel fibers is 0.75% of the mass of the soil particles) with a length and a diameter of 13 mm and 0.3 mm, respectively, to the simulated high temperature-high ice content frozen soil, and mixing the mixture evenly to obtain a mixture 1;

[0071] (5) adding sulphoaluminate cement (cement ratio is 10% of the mass of soil particles) to the mixture 1 and mixing well to obtain a mixture 2;

[0072] (6) Add liquid water (the amount of liquid water is 10% of the mass of the soil particles) to the second mixture, mix well, and obtain a high-temperature-high-ice content steel fiber foundation cement soil.

[0073] Comparative Example 3

[0074] like Figure 4 As shown, a high temperature-high ice content steel fiber foundation cement soil is prepared by the following steps:

[0075] (1) drying, crushing and screening the soil particles to obtain clay particles with a particle size of less than 2 mm;

[0076] (2) crushing and screening the ice to obtain ice particles with a particle size of less than 2 mm;

[0077] (3) mixing the soil particles and the ice particles evenly (the ice particle content is 30% of the mass of the soil particles), and then storing them at -1°C for 24 hours to obtain simulated high temperature-high ice content frozen soil;

[0078] (4) adding liquid water (the amount of liquid water is 10% of the mass of soil particles) to the simulated high temperature-high ice content frozen soil, mixing evenly, and obtaining a mixture 1;

[0079] (5) adding sulphoaluminate cement (cement ratio is 10% of the mass of soil particles) to the mixture 1, mixing evenly, and standing at -1°C to obtain a mixture 2;

[0080] (6) Add copper-plated microfilament steel fibers with a length and diameter of 13 mm and 0.3 mm respectively (the steel fiber parameter is 0.75% of the mass of the soil particles) to the second mixture, mix well, and obtain high-temperature-high ice content steel fiber foundation cement soil.

[0081] Comparative Example 4

[0082] like Figure 5 As shown, a high temperature-high ice content steel fiber foundation cement soil is prepared by the following steps:

[0083] (1) drying, crushing and screening the soil particles to obtain clay particles with a particle size of less than 2 mm;

[0084] (2) crushing and screening the ice to obtain ice particles with a particle size of less than 2 mm;

[0085] (3) mixing the soil particles and the ice particles evenly (the ice particle content is 30% of the mass of the soil particles), and then storing them at -1°C for 24 hours to obtain simulated high temperature-high ice content frozen soil;

[0086] (4) adding liquid water (the amount of liquid water is 10% of the mass of soil particles) to the simulated high temperature-high ice content frozen soil, mixing evenly, and obtaining a mixture 1;

[0087] (5) adding sulphoaluminate cement (cement ratio is 10% of the mass of soil particles) to the mixture 1 and mixing well to obtain a mixture 2;

[0088] (6) Add copper-plated microfilament steel fibers with a length and diameter of 13 mm and 0.3 mm respectively (the steel fiber parameter is 0.75% of the mass of the soil particles) to the second mixture, mix well, and obtain high-temperature-high ice content steel fiber foundation cement soil.

[0089] Comparative Example 5

[0090] like Figure 6 As shown, a high temperature-high ice content steel fiber foundation cement soil is prepared by the following steps:

[0091] (1) drying, crushing and screening the soil particles to obtain clay particles with a particle size of less than 2 mm;

[0092] (2) crushing and screening the ice to obtain ice particles with a particle size of less than 2 mm;

[0093] (3) mixing the soil particles and the ice particles evenly (the ice particle content is 30% of the mass of the soil particles), and then storing them at -1°C for 24 hours to obtain simulated high temperature-high ice content frozen soil;

[0094] (4) adding sulphoaluminate cement (cement parameter is 10% of the mass of soil particles) to the simulated high temperature-high ice content frozen soil, mixing evenly, and obtaining mixture 1;

[0095] (5) adding copper-plated microfilament steel fibers (the amount of the steel fibers is 0.75% of the mass of the soil particles) with a length and a diameter of 13 mm and 0.3 mm, respectively, to the mixture 1, and mixing the mixture evenly to obtain a mixture 2;

[0096] (6) Add liquid water (the amount of liquid water is 10% of the mass of the soil particles) to the second mixture, mix well, and obtain a high-temperature-high-ice content steel fiber foundation cement soil.

[0097] Comparative Example 6

[0098] like Figure 7 As shown, a high temperature-high ice content steel fiber foundation cement soil is prepared by the following steps:

[0099] (1) drying, crushing and screening the soil particles to obtain clay particles with a particle size of less than 2 mm;

[0100] (2) crushing and screening the ice to obtain ice particles with a particle size of less than 2 mm;

[0101] (3) mixing the soil particles and the ice particles evenly (the ice particle content is 30% of the mass of the soil particles), and then storing them at -1°C for 24 hours to obtain simulated high temperature-high ice content frozen soil;

[0102] (4) adding sulphoaluminate cement (cement parameter is 10% of the mass of soil particles) to the simulated high temperature-high ice content frozen soil, mixing evenly, and obtaining mixture 1;

[0103] (5) adding liquid water (the amount of liquid water is 10% of the mass of the soil particles) to the mixture 1 and mixing the mixture evenly to obtain a mixture 2;

[0104] (6) Add copper-plated microfilament steel fibers with a length and diameter of 13 mm and 0.3 mm respectively (the steel fiber parameter is 0.75% of the mass of the soil particles) to the second mixture, mix well, and obtain high-temperature-high ice content steel fiber foundation cement soil.

[0105] Comparative Example 7

[0106] like Figure 8 As shown, a high temperature-high ice content steel fiber foundation cement soil is prepared by the following steps:

[0107] (1) drying, crushing and screening the soil particles to obtain clay particles with a particle size of less than 2 mm;

[0108] (2) crushing and screening the ice to obtain ice particles with a particle size of less than 2 mm;

[0109] (3) mixing the soil particles and the ice particles evenly (the ice particle content is 30% of the mass of the soil particles), and then storing them at -1°C for 24 hours to obtain simulated high temperature-high ice content frozen soil;

[0110] (4) adding sulphoaluminate cement (cement parameter is 10% of the mass of soil particles) to the simulated high temperature-high ice content frozen soil, mixing evenly, and obtaining mixture 1;

[0111] (5) adding liquid water (the amount of liquid water is 10% of the mass of the soil particles) to the mixture 1, mixing evenly, and standing at -1°C to obtain a mixture 2;

[0112] (6) Add copper-plated microfilament steel fibers with a length and diameter of 13 mm and 0.3 mm respectively (the steel fiber parameter is 0.75% of the mass of the soil particles) to the second mixture, mix well, and obtain high-temperature-high ice content steel fiber foundation cement soil.

[0113] Comparative Example 8

[0114] like Fig. 9 As shown, a high temperature-high ice content steel fiber foundation cement soil is prepared by the following steps:

[0115] (1) drying, crushing and screening the soil particles to obtain clay particles with a particle size of less than 2 mm;

[0116] (2) crushing and screening the ice to obtain ice particles with a particle size of less than 2 mm;

[0117] (3) mixing the soil particles and the ice particles evenly (the ice particle content is 30% of the mass of the soil particles), and then storing them at -1°C for 24 hours to obtain simulated high temperature-high ice content frozen soil;

[0118] (4) adding sulphoaluminate cement (cement parameter is 10% of the mass of soil particles) to the simulated high temperature-high ice content frozen soil, mixing evenly, and standing at -1°C to obtain mixture 1;

[0119] (5) adding liquid water (the amount of liquid water is 10% of the mass of the soil particles) to the mixture 1 and mixing the mixture evenly to obtain a mixture 2;

[0120] (6) Add copper-plated microfilament steel fibers with a length and diameter of 13 mm and 0.3 mm respectively (the steel fiber parameter is 0.75% of the mass of the soil particles) to the second mixture, mix well, and obtain high-temperature-high ice content steel fiber foundation cement soil.

[0121] Comparative Example 9

[0122] like Fig.10 As shown, a high temperature-high ice content steel fiber foundation cement soil is prepared by the following steps:

[0123] (1) drying, crushing and screening the soil particles to obtain clay particles with a particle size of less than 2 mm;

[0124] (2) crushing and screening the ice to obtain ice particles with a particle size of less than 2 mm;

[0125] (3) mixing the soil particles and the ice particles evenly (the ice particle content is 30% of the mass of the soil particles), and then storing them at -1°C for 24 hours to obtain simulated high temperature-high ice content frozen soil;

[0126] (4) adding sulphoaluminate cement (cement parameter is 10% of the mass of soil particles) to the simulated high temperature-high ice content frozen soil, mixing evenly, and standing at -1°C and mixing evenly to obtain mixture 1;

[0127] (5) adding copper-plated microfilament steel fibers having a length and a diameter of 13 mm and 0.3 mm, respectively (the steel fiber parameter is 0.75% of the mass of the soil particles) to the mixture one to obtain a mixture two;

[0128] (6) Add liquid water (the amount of liquid water is 10% of the mass of the soil particles) to the second mixture, mix well, and obtain a high-temperature-high-ice content steel fiber foundation cement soil.

[0129] The high temperature-high ice content steel fiber foundation cement soil obtained in Example 1 and Comparative Examples 1-9 were added into a mold with a diameter of 50 mm and a height of 100 mm for multiple times to prepare high temperature-high ice content steel fiber foundation cement soil samples, which were cured at -1°C for 7 days, and then unconfined compressive strength tests were carried out to obtain the unconfined compressive strength of each high temperature-high ice content steel fiber foundation cement soil sample. The test results are shown in FIG. Fig.11 shown.

[0130] from Fig.11 It can be seen that the unconfined compressive strength (5.32 MPa) of the high-temperature-high ice content steel fiber foundation cement soil sample prepared according to the preparation method of the present invention is significantly higher than that of comparison method one (4.2 MPa), comparison method two (3.27 MPa), comparison method three (4.5 MPa), comparison method four (3.15 MPa), comparison method five (3.22 MPa), comparison method six (3.3 MPa), comparison method seven (4.5 MPa), comparison method eight (4.8 MPa), and comparison method nine (4.49 MPa).

[0131] In summary, the present invention can prepare high-temperature-high ice content steel fiber foundation cement soil with better mechanical properties. Compared with the prior art, the present invention has significant progress.

[0132] The above description is only a representative embodiment of the present invention and does not limit the present invention in any form. Any technician familiar with the profession, without departing from the scope of the technical solution of the present invention, uses the above-disclosed technical contents to make some changes or modifications to the embodiments are equivalent embodiments of the present invention. However, any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A method for preparing high temperature and high ice content steel fiber foundation cement soil, characterized in that: The following steps are involved: S1: Soil particles and ice particles are used to prepare simulated high temperature and high ice content frozen soil; S2: adding steel fiber to the simulated high temperature-high ice content frozen soil and mixing evenly to obtain mixture 1; S3: adding cement to the mixture 1, mixing evenly, and standing at -1°C to obtain a mixture 2; S4: Add liquid water to the mixture 2 and mix them evenly to obtain high temperature-high ice content steel fiber foundation cement soil.

2. The method for preparing high temperature and high ice content steel fiber foundation cement soil according to claim 1, characterized in that: In step S1, the simulated high temperature-high ice content frozen soil is prepared by the following steps: obtaining soil particles and ice particles, and mixing the soil particles and the ice particles evenly, and then storing them at -1°C for 24 hours to obtain the simulated high temperature-high ice content frozen soil.

3. The method for preparing high temperature and high ice content steel fiber foundation cement soil according to claim 2, characterized in that: The soil particles are clay particles with a particle size less than 2 mm, and the ice particles have a particle size less than 2 mm.

4. The method for preparing high temperature and high ice content steel fiber foundation cement soil according to claim 2, characterized in that: The mass of the ice particles accounts for 30% of the mass of the soil particles.

5. The method for preparing high temperature and high ice content steel fiber foundation cement soil according to claim 1, characterized in that: In step S2, the steel fiber is copper-plated microfilament steel fiber.

6. The method for preparing high temperature and high ice content steel fiber foundation cement soil according to claim 5, characterized in that: The length and diameter of the steel fiber are 13 mm and 0.3 mm respectively.

7. The method for preparing high temperature and high ice content steel fiber foundation cement soil according to claim 1, characterized in that: In step S3, the cement is sulphoaluminate cement.

8. The method for preparing high temperature and high ice content steel fiber foundation cement soil according to claim 1, characterized in that: In step S3, the standing time is 0.5 h.

9. The method for preparing high temperature and high ice content steel fiber foundation cement soil according to any one of claims 1 to 8, characterized in that: In step S2, the mass of the steel fiber is 0.75% of the mass of the soil particles; in step S3, the mass of the cement is 10% of the mass of the soil particles; in step S4, the mass of the water is 10% of the mass of the soil particles.

10. A high temperature and high ice content steel fiber foundation cement soil, characterized in that: The cement soil is prepared by the method for preparing high temperature-high ice content steel fiber foundation according to any one of claims 1 to 9.

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