A method for producing a construction material from shield muck

Abstract

The application provides a method for preparing component materials by using shield muck, and belongs to the technical field of muck recycling. The method is as follows: mixing a muck solidifying agent and water uniformly, placing the mixture in a stirring container, placing muck fine aggregate, muck coarse aggregate and a cementing component in the stirring container and stirring uniformly, then loading into a mold, vibration-pressing forming, film curing for 0.8-1.2 days, demolding, and again film curing for 28 days. The shield muck is pressurized, crushed and sieved into muck fine aggregate and muck coarse aggregate, and a specific component of the muck solidifying agent and the cementing component are added, the feeding is carried out according to a certain order, the stirring rate in the feeding process is controlled and the like, so that the strength of the shield muck after solidification is greatly improved, the demand of building components is met, the shield muck is maximally utilized, the muck is reduced to be transported out, the construction cost is reduced, and environmental pollution is avoided.

Description

Technical Field

[0001] This invention belongs to the field of slag and soil recycling technology, and in particular relates to a method for preparing component materials using tunnel boring machine slag and soil. Background Technology

[0002] With the development of infrastructure, more and more cities are using the shield tunneling method to construct underground projects. Shield tunneling excavation soil has become a major source of waste in urban construction, posing a significant challenge to the urban environment. Currently, the main method for disposing of shield tunneling excavation soil is landfilling. This method requires transporting the soil to landfills, which easily leads to road spillage and environmental pollution, and also occupies large areas of land. Furthermore, a large amount of resources such as boulders, gravel, sand, and clay contained in shield tunneling excavation soil are wasted. Therefore, effective environmental treatment and resource utilization of shield tunneling excavation soil is extremely urgent and necessary. Developing resource utilization technologies for shield tunneling excavation soil can effectively achieve safe waste disposal and resource recycling, promote ecological civilization construction, and is of vital importance for reducing land occupation, avoiding environmental pollution, creating livable cities, and building a resource-saving society. Existing research has utilized shield tunneling excavation soil to prepare ceramsite, sintered bricks, and aggregates, but the resource utilization rate of such sintered and ceramsite solid waste is low, making large-scale production difficult, and the material costs are high.

[0003] In view of this, the present invention is hereby proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a method for preparing component materials using tunnel boring machine (TBM) slag, in order to solve the above-mentioned problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A method for preparing component materials using tunnel boring machine (TBM) slag includes the following steps:

[0007] S1: Mix the slag solidification agent and water evenly and place them in a mixing container.

[0008] Furthermore, the slag curing agent comprises 0.1-5 parts of nano-silica, 40-60 parts of epoxy resin, 10-60 parts of moisture-curing curing agent, and 5-20 parts of microcapsules.

[0009] In addition, the slag solidifier can be one or more of ionic solidifiers, microbial solidifiers, or bioenzyme solidifiers.

[0010] S2: Place the fine aggregate, coarse aggregate, and cementitious components of the slag into the mixing container and mix them evenly.

[0011] Further, the amounts of the slag solidifying agent, water, slag fine aggregate, slag coarse aggregate and cementing component mentioned in steps S1 and S2 are in the mass ratio of (0.01-1):(5-10):(20-60):(20-30):(10-20).

[0012] Preferably, the fine aggregate of the slag is slag particles with a particle size of less than 5 mm, and the coarse aggregate of the slag is slag particles with a particle size of more than 5 mm.

[0013] Preferably, when the amount of fine aggregate or coarse aggregate screened from the tunnel boring machine slag does not meet the specified requirements, the tunnel boring machine slag is pressurized and crushed using a pressure crushing device, and then screened again until the amount of fine aggregate or coarse aggregate meets the specified requirements.

[0014] Furthermore, the pressure crushing equipment includes a feeding hopper, a pressure chamber, and a crushing chamber. After the slag and slag solidifying agent are thoroughly mixed, they enter the pressure chamber from the feeding hopper. Pressure is applied to the pressure plate by a pressure rod, causing the slag to be compressed and solidified. Different post-pressure strengths are achieved by adjusting the applied pressure, the solidifying agent content, and the compression time. After solidification, the slag enters the crushing chamber, where a mixing paddle crushes large pieces of solidified soil to the required particle size.

[0015] Preferably, when adding the fine aggregate, coarse aggregate, and cementing components of the slag, inorganic salt whiskers, water-reducing agents, toughening components, and surfactants are also added.

[0016] The inorganic salt whiskers can serve as a reinforcing and toughening component, achieving a synergistic curing effect with the cementing component. The surfactant can work together with the water-reducing agent to reduce the amount of water added and improve the material strength. The toughening component can increase the impact resistance, toughness, and strength of the component.

[0017] More preferably, the feeding sequence is as follows: coarse aggregate of slag, surfactant, toughening component, water-reducing agent, cementing component, fine aggregate of slag, and inorganic salt whiskers, and the feeding process is to add materials while stirring.

[0018] First, the coarse aggregate of the slag is added and mixed to form a uniform skeleton. Then, surfactants, toughening components, water-reducing agents, etc. are added in the middle. Subsequently, cementing components are added to release the solidifying components in the slag solidifying agent from the microcapsules. Finally, fine aggregate of slag and inorganic salt whiskers are added. Utilizing the chemical activity of fine aggregates such as silt and clay, the solidifying components react with the chemically active components in the fine aggregates to generate a gel, which binds the soil particles into a whole.

[0019] More preferably, the stirring rate before adding the gelling component is greater than that after adding the gelling component, so that a temperature difference can be formed before and after adding the gelling component, thereby making the subsequent chemical bonding more complete.

[0020] Further, the mass ratio of the inorganic salt whiskers, water-reducing agent, toughening component and surfactant to the gelling component is (1-5):(0.01-1):(0.01-0.05):(0.01-1):(10-20).

[0021] Preferably, the inorganic salt whiskers include calcium sulfate whiskers or calcium carbonate whiskers, the water-reducing agent includes naphthalene-based water-reducing agent or polycarboxylate water-reducing agent, the toughening component includes one or more of pitch-based carbon fiber, lignin-based carbon fiber or polyacrylonitrile-based carbon fiber, and the surfactant includes polyvinyl alcohol or Tween 20.

[0022] Preferably, the cementitious component includes one or more of the following: cement, fly ash, clay, silica fume, slag, steel slag, rice husk ash, or geopolymer materials. 。

[0023] S3: Load the product from step S2 into the mold, vibrate and press it into shape, cover and cure for 0.8-1.2 days, then demold and cover and cure again for 28 days.

[0024] This invention involves pressurizing and crushing shield tunneling excavated soil and screening it into fine aggregate and coarse aggregate, then adding specific components of a soil solidifying agent and a cementing component. The materials are added in a specific order, and the stirring rate during the adding process is controlled. This significantly increases the strength of the shield tunneling excavated soil after solidification, meeting the requirements of building components, maximizing the utilization of shield tunneling excavated soil, reducing the amount of excavated soil transported off-site, lowering construction costs, and avoiding environmental pollution. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the pressure crushing equipment provided by the present invention.

[0027] Among them, 1-feeding bin, 2-pressurizing bin, 3-pressurizing plate, 4-pressurizing rod, 5-crushing bin, 6-mixing paddle, 7-discharge port, 8-discharge valve. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] As used in this article:

[0030] "Prepared from" is synonymous with "comprising". The terms "comprising", "including", "having", "containing", or any other variations thereof as used herein are intended to cover non-exclusive inclusion. For example, a composition, step, method, article, or apparatus that includes the listed elements is not necessarily limited to those elements, but may include other elements not expressly listed or elements inherent to such composition, step, method, article, or apparatus.

[0031] When a quantity, concentration, or other value or parameter is expressed as a range, a preferred range, or a range defined by a series of upper and lower preferred values, this should be understood as specifically disclosing all ranges formed by any pair of any upper or preferred value with any lower or preferred value, regardless of whether the range is disclosed individually. For example, when the range “1–5” is disclosed, the described range should be interpreted as including ranges “1–4”, “1–3”, “1–2”, “1–2 and 4–5”, “1–3 and 5”, etc. When numerical ranges are described herein, unless otherwise stated, the range is intended to include its endpoints and all integers and fractions within that range.

[0032] In these embodiments, unless otherwise specified, the portions and percentages are all by weight.

[0033] "Parts by mass" refers to the basic unit of measurement that expresses the mass ratio of multiple components. One part can represent any unit mass. It is important to understand that, unlike the number of parts by mass, the sum of the parts by mass of all components is not limited to 100 parts.

[0034] "And / or" is used to indicate that one or both of the described situations may occur, for example, A and / or B includes (A and B) and (A or B).

[0035] The embodiments of the present invention will be described in detail below with reference to specific examples. However, those skilled in the art will understand that the following examples are for illustrative purposes only and should not be considered as limiting the scope of the invention. Unless otherwise specified in the examples, conventional conditions or conditions recommended by the manufacturer are followed. Reagents or instruments whose manufacturers are not specified are all commercially available products.

[0036] The pressure crushing equipment provided by this invention, such as Figure 1 As shown, the system includes a feeding bin 1, a pressurizing bin 2, and a crushing bin 5 connected from top to bottom. The pressurizing bin 2 contains a pressure plate 3 driven by a pressure rod 4. The crushing bin 5 contains an agitator 6, and the bottom of the crushing bin 5 has a discharge port 7 controlled by a discharge valve 8. Slag or a mixture of slag and slag solidifier enters the pressurizing bin 2 from the feeding bin 1. Pressure is applied to the pressure plate 3 by the pressure rod 4, causing the slag to be compressed and solidified. Different post-pressurization strengths can be achieved by adjusting the applied pressure, the slag solidifier content, and the compression time. The slag then enters the crushing bin 5, where the agitator 6 crushes large pieces of solidified soil to the required particle size. Finally, the discharge valve 8 is opened, and the crushed slag is discharged from the discharge port 7.

[0037] Example 1

[0038] A method for preparing component materials using cohesive soil from shield tunneling excavation:

[0039] (1) Weigh 50g of slag curing agent according to the component mass ratio of nano silica, bisphenol A type epoxy resin, moisture curing agent methoxysilane, and polymethyl acrylate microcapsules as 3:50:20:8, and then mix it with 6.95kg of water in a mixing tank.

[0040] (2) Weigh 56 kg of fine aggregate (particle size less than 5 mm) and 20 kg of coarse aggregate (particle size greater than 5 mm) for later use. When the fine aggregate or coarse aggregate of the shield tunneling excavated soil after screening does not meet the required amount, use the pressure crushing equipment in this invention to crush and screen the shield tunneling excavated soil again until the required amount of fine aggregate or coarse aggregate is obtained.

[0041] (3) Weigh 17kg of cement (cementing component), 3kg of calcium sulfate whiskers, 500g of polycarboxylate superplasticizer, 30g of pitch-based carbon fiber and 100g of polyvinyl alcohol.

[0042] (4) Add the raw materials from steps (2) and (3) into the mixing tank of step (1) in the following order: coarse aggregate of slag, polyvinyl alcohol, asphalt-based carbon fiber, polycarboxylate superplasticizer, cement, fine aggregate of slag, and calcium sulfate whiskers. The feeding process is to add materials while stirring, and the stirring rate is 80 r / min.

[0043] (5) Pour the product from step (4) into a mold, manually vibrate and press it into shape, cover the surface with a plastic film, place it in a standard cement mortar curing room for 1 day, and then demold it. After demolding, cover the entire surface of the block with a plastic film, and then place it in a standard curing room for curing until the specified age of 28 days. The compressive strength of the obtained component material is shown in Table 1.

[0044] Example 2

[0045] A method for preparing component materials using sandy soil shield tunneling excavation soil:

[0046] (1) Weigh 40g of slag curing agent according to the component mass ratio of nano silica, bisphenol A type epoxy resin, moisture-curing curing agent methoxysilane, and polymethyl acrylate microcapsules as 1:60:40:5, and then mix it with 7.96kg of water in a mixing tank.

[0047] (2) Weigh 54 kg of fine aggregate (particle size less than 5 mm) and 20 kg of coarse aggregate (particle size greater than 5 mm) for later use. When the fine aggregate or coarse aggregate of the shield tunneling excavated soil after screening does not meet the required amount, use the pressure crushing equipment in this invention to crush and screen the shield tunneling excavated soil again until the required amount of fine aggregate or coarse aggregate is obtained.

[0048] (3) Weigh 18kg of cement (cementing component), 2kg of calcium carbonate whiskers, 300g of polycarboxylate superplasticizer, 50g of lignin-based carbon fiber and 10g of Tween 20.

[0049] (4) Add the raw materials from steps (2) and (3) into the mixing tank of step (1) in the following order: coarse aggregate of slag, Tween 20, lignin-based carbon fiber, polycarboxylate superplasticizer, cement, fine aggregate of slag, and calcium carbonate whiskers. The feeding process is to add materials while stirring, and the stirring rate is 80 r / min.

[0050] (5) Pour the product from step (4) into a mold, manually vibrate and press it into shape, cover the surface with a plastic film, and place it in a standard cement mortar curing room for 1.2 days before demolding. After demolding, cover the entire surface of the block with a plastic film and place it in a standard curing room for curing until the specified age of 28 days. The compressive strength of the obtained component material is shown in Table 1.

[0051] Example 3

[0052] A method for preparing component materials using silty soil from shield tunneling excavation:

[0053] (1) Weigh 60g of slag curing agent according to the component mass ratio of nano silica, bisphenol A type epoxy resin, moisture curing agent methoxysilane, and polymethyl acrylate microcapsules as 5:60:10:5, and then mix it with 6.94kg of water in a mixing tank.

[0054] (2) Weigh 46 kg of fine aggregate (particle size less than 5 mm) and 30 kg of coarse aggregate (particle size greater than 5 mm) for later use. When the fine aggregate or coarse aggregate of the shield tunneling excavated soil after screening does not meet the required amount, use the pressure crushing equipment in this invention to crush and screen the shield tunneling excavated soil again until the required amount of fine aggregate or coarse aggregate is obtained.

[0055] (3) Weigh 17kg of cement (cementing component), 5kg of calcium sulfate whiskers, 1kg of polycarboxylate superplasticizer, 10g of pitch-based carbon fiber and 50g of polyvinyl alcohol.

[0056] (4) Add the raw materials from steps (2) and (3) into the mixing tank of step (1) in the following order: coarse aggregate of slag, polyvinyl alcohol, asphalt-based carbon fiber, polycarboxylate superplasticizer, cement, fine aggregate of slag, and calcium sulfate whiskers. The feeding process is to add materials while stirring, and the stirring rate is 80 r / min.

[0057] (5) Pour the product from step (4) into a mold, manually vibrate and press it into shape, cover the surface with a plastic film, and place it in a standard cement mortar curing room for 0.8 days before demolding. After demolding, cover the entire surface of the block with a plastic film and place it in a standard curing room for curing until the specified age of 28 days. The compressive strength of the obtained component material is shown in Table 1.

[0058] Example 4

[0059] A method for preparing component materials using loess shield tunneling slag:

[0060] (1) Weigh 50g of slag curing agent according to the component mass ratio of nano silica, bisphenol A type epoxy resin, moisture curing agent methoxysilane, and polymethyl acrylate microcapsules as 3:50:20:8, and then mix it with 6.75kg of water in a mixing tank.

[0061] (2) Weigh 48 kg of fine aggregate (particle size less than 5 mm) and 28 kg of coarse aggregate (particle size greater than 5 mm) for later use. When the fine aggregate or coarse aggregate of the shield tunneling excavated soil after screening does not meet the required amount, use the pressure crushing equipment in this invention to crush and screen the shield tunneling excavated soil again until the required amount of fine aggregate or coarse aggregate is obtained.

[0062] (3) Weigh 17kg of cement (cementing component), 3kg of calcium sulfate whiskers, 500g of polycarboxylate superplasticizer, 30g of pitch-based carbon fiber and 100g of polyvinyl alcohol.

[0063] (4) Add the raw materials from steps (2) and (3) into the mixing tank of step (1) in the following order: coarse aggregate of slag, polyvinyl alcohol, asphalt-based carbon fiber, polycarboxylate superplasticizer, cement, fine aggregate of slag, and calcium sulfate whiskers. The feeding process is to add materials while stirring, and the stirring rate is 80 r / min.

[0064] (5) Pour the product from step (4) into a mold, manually vibrate and press it into shape, cover the surface with a plastic film, place it in a standard cement mortar curing room for 1 day, and then demold it. After demolding, cover the entire surface of the block with a plastic film, and then place it in a standard curing room for curing until the specified age of 28 days. The compressive strength of the obtained component material is shown in Table 1.

[0065] Example 5

[0066] The difference from Example 1 is that in step (4), the stirring rate before adding cement is 100 r / min, and the stirring rate after adding cement is 80 r / min.

[0067] The compressive strength of the obtained component materials is shown in Table 1.

[0068] Comparative Example 1

[0069] A method for preparing component materials using cohesive soil from shield tunneling excavation:

[0070] (1) Weigh 50g of slag curing agent according to the component mass ratio of nano silica, bisphenol A type epoxy resin, moisture curing agent methoxysilane, and polymethyl acrylate microcapsules as 3:50:20:8, and then mix it with 10.95kg of water in a mixing tank.

[0071] (2) Weigh 62 kg of fine aggregate (particle size less than 5 mm) and 15 kg of coarse aggregate (particle size greater than 5 mm) for later use. When the fine aggregate or coarse aggregate of the shield tunneling excavated soil after screening does not meet the required amount, use the pressure crushing equipment in this invention to crush and screen the shield tunneling excavated soil again until the required amount of fine aggregate or coarse aggregate is obtained.

[0072] (3) Weigh 12kg of cement (cementing component), 3kg of calcium sulfate whiskers, 500g of polycarboxylate superplasticizer, 30g of pitch-based carbon fiber and 100g of polyvinyl alcohol.

[0073] (4) Add the raw materials from steps (2) and (3) into the mixing tank of step (1) in the following order: coarse aggregate of slag, polyvinyl alcohol, asphalt-based carbon fiber, polycarboxylate superplasticizer, cement, fine aggregate of slag, and calcium sulfate whiskers. The feeding process is to add materials while stirring.

[0074] (5) Pour the product from step (4) into a mold, manually vibrate and press it into shape, cover the surface with a plastic film, place it in a standard cement mortar curing room for 1 day, and then demold it. After demolding, cover the entire surface of the block with a plastic film, and then place it in a standard curing room for curing until the specified age of 28 days. The compressive strength of the obtained component material is shown in Table 1.

[0075] Comparative Example 2

[0076] A method for preparing component materials using cohesive soil from shield tunneling excavation:

[0077] (1) Weigh 50g of slag curing agent according to the component mass ratio of nano silica, bisphenol A type epoxy resin, moisture curing agent methoxysilane, and polymethyl acrylate microcapsules as 3:50:20:8, and then mix it with 6.95kg of water in a mixing tank.

[0078] (2) Weigh 56 kg of fine aggregate (particle size less than 5 mm) and 18 kg of coarse aggregate (particle size greater than 5 mm) for later use. When the fine aggregate or coarse aggregate of the shield tunneling excavated soil after screening does not meet the required amount, use the pressure crushing equipment in this invention to crush and screen the shield tunneling excavated soil again until the required amount of fine aggregate or coarse aggregate is obtained.

[0079] (3) Weigh 19 kg of cement (cementing component), 3 kg of calcium sulfate whiskers, 500 g of polycarboxylate superplasticizer, 30 g of pitch-based carbon fiber and 100 g of polyvinyl alcohol.

[0080] (4) Add the raw materials from steps (2) and (3) into the mixing tank of step (1) in the following order: coarse aggregate of slag, polyvinyl alcohol, asphalt-based carbon fiber, polycarboxylate superplasticizer, cement, fine aggregate of slag, and calcium sulfate whiskers. The feeding process is to add materials while stirring.

[0081] (5) Pour the product from step (4) into a mold, manually vibrate and press it into shape, cover the surface with a plastic film, place it in a standard cement mortar curing room for 1 day, and then demold it. After demolding, cover the entire surface of the block with a plastic film, and then place it in a standard curing room for curing until the specified age of 28 days. The compressive strength of the obtained component material is shown in Table 1.

[0082] Comparative Example 3

[0083] The difference from Example 1 is that the feeding sequence is: coarse aggregate of slag, fine aggregate of slag, polyvinyl alcohol, asphalt-based carbon fiber, polycarboxylate superplasticizer, cement, and calcium sulfate whiskers. The compressive strength of the resulting component material is shown in Table 1.

[0084] Comparative Example 4

[0085] The difference from Example 1 is that the order of addition is cement, coarse aggregate from slag, polyvinyl alcohol, asphalt-based carbon fiber, polycarboxylate superplasticizer, fine aggregate from slag, and calcium sulfate whiskers. The compressive strength of the resulting component material is shown in Table 1.

[0086] Table 1 Comparison of compressive strength of component materials obtained from the examples and comparative examples.

[0087] condition 28-day strength (MPa) Example 1 17 Example 2 16 Example 3 15 Example 4 15 Example 5 19 Comparative Example 1 15 Comparative Example 2 12 Comparative Example 3 14 Comparative Example 4 12

[0088] As shown in Table 1, both excessive coarse aggregate and insufficient fine aggregate in the slag will lead to a decrease in the compressive strength of the final component material. Furthermore, if the fine aggregate or cementitious components such as cement are added too early in the feeding sequence, the compressive strength of the final component material will also decrease significantly.

[0089] Please note that the technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments have been described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. The above embodiments only illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A method for preparing component materials using tunnel boring machine (TBM) slag, characterized in that, Includes the following steps: S1: Mix the slag solidification agent and water evenly and place them in a mixing container; S2: Place the fine aggregate, coarse aggregate, and cementitious components of the slag into the mixing container and mix them evenly. S3: Load the product from step S2 into the mold, vibrate and press it into shape, cover and cure for 0.8-1.2 days, then demold and cover and cure again for 28 days; The slag solidifier mentioned in step S1 includes 0.1-5 parts of nano silica, 40-60 parts of epoxy resin, 10-60 parts of moisture-curing solidifier, and 5-20 parts of microcapsules.

2. The method for preparing component materials using shield tunneling slag according to claim 1, characterized in that, The amounts of the slag solidifying agent, water, slag fine aggregate, slag coarse aggregate and cementitious component mentioned in steps S1 and S2 are in the mass ratio of (0.01-1): (5-10): (20-60): (20-30): (10-20).

3. The method for preparing component materials using shield tunneling slag according to claim 2, characterized in that, In step S2, the fine aggregate of the slag is slag particles with a particle size of less than 5 mm, and the coarse aggregate of the slag is slag particles with a particle size of more than 5 mm.

4. The method for preparing component materials using shield tunneling slag according to claim 3, characterized in that, In step S2, when the fine aggregate or coarse aggregate of the shield tunnel slag screened out does not meet the required amount, the shield tunnel slag is pressurized and crushed using a pressure crushing device, and then screened again until the required amount of fine aggregate or coarse aggregate of the shield tunnel is obtained.

5. The method for preparing component materials using shield tunneling slag according to claim 1, characterized in that, When adding the fine aggregate, coarse aggregate and cementitious components of the slag in step S2, inorganic salt whiskers, water-reducing agent, toughening component and surfactant are also added.

6. The method for preparing component materials using shield tunneling slag according to claim 5, characterized in that, In step S2, the order of feeding is as follows: coarse aggregate of slag, surfactant, toughening component, water-reducing agent, cementing component, fine aggregate of slag, and inorganic salt whiskers. The feeding process involves adding materials while stirring.

7. The method for preparing component materials using shield tunneling excavation soil according to claim 5 or 6, characterized in that, In step S2, the mass ratio of the inorganic salt whiskers, water-reducing agent, toughening component and surfactant to the gelling component is (1-5):(0.01-1):(0.01-0.05):(0.01-1):(10-20).

8. The method for preparing component materials using shield tunneling excavation soil according to claim 5 or 6, characterized in that, In step S2, the inorganic salt whiskers include calcium sulfate whiskers or calcium carbonate whiskers, the water-reducing agent includes naphthalene-based water-reducing agent or polycarboxylate water-reducing agent, the toughening component includes one or more of pitch-based carbon fiber, lignin-based carbon fiber or polyacrylonitrile-based carbon fiber, and the surfactant includes polyvinyl alcohol or Tween 20.

9. The method for preparing component materials using shield tunneling slag according to claim 1, characterized in that, The cementitious components mentioned in step S2 include one or more of cement, fly ash, clay, silica fume, slag, steel slag, rice husk ash, or geopolymer materials.

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