Method for simulating Mars building masonry based on Mars in-situ resources

Abstract

The invention relates to the technical field of building construction methods, in particular to a method for simulating masonry of a Mars building based on Mars in-situ resources, which comprises the following steps: mixing simulated Mars soil and water ice, filling into a mold, applying high pressure to melt the ice to drive hydration reaction, and curing to form Mars bricks with compressive strength of 21.7 MPa; after high-temperature curing treatment, the highest compressive strength can reach 44.5 MPa; meanwhile, molten sulfur and Mars soil are mixed to prepare Mars mortar, and the bonding strength is optimized to 2.0 MPa through interface notch treatment. Mars in-situ resources are utilized, component prefabrication and construction links are separated, energy consumption and transportation cost are remarkably reduced, and construction efficiency and environmental adaptability are improved. A compressive strength numerical model is established according to mechanical properties under different conditions, and reliable technical support is provided for Mars buildings. The method is suitable for sustainable building construction in an extreme environment, and has important deep space exploration application value.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction methods, and in particular to a method for simulating the preparation of building materials based on Martian in-situ resources and the construction of Martian buildings. Background Art

[0002] With the continuous advancement of human deep space exploration, Mars has become the most realistic target for extraterrestrial immigration because of its similar day and night cycle, geological structure characteristics and potential resources to the Earth. The Zhurong Mars rover discovered multi-layer inclined sedimentary structures in the Utopia Planitia through subsurface penetrating radar. Its geological characteristics are highly consistent with the coastal sediments on Earth. For the first time, it provided direct evidence for the existence of ancient oceans in the middle and low latitudes of Mars. This breakthrough discovery further strengthened the scientific value of Mars as an object of extraterrestrial survival research. However, the extreme environment of Mars poses severe challenges to construction technology. The average surface pressure of Mars is only 0.6% of that of the Earth, the temperature difference between day and night is as high as 160°C, the intensity of cosmic radiation is more than 200 times that of the Earth, and there are significant resource limitations such as lack of liquid water. Traditional concrete technology relies on liquid water for hydration reaction, and the low pressure environment of Mars causes water to sublimate directly, which is difficult to meet the needs of traditional processes. In addition, the Martian regolith is composed of 7%-12% sulfides and 40%-50% SiO2. This unique material property has laid a key foundation for the development of new construction technologies that simulate in-situ resource utilization, but it also places higher demands on material durability and construction feasibility.

[0003] The current technical paths show a polarization trend: technologies that simulate the improvement of earth materials (such as 3D printed lunar soil concrete) are difficult to support large-scale construction because they rely on external supplies; and although the in-situ resource utilization (ISRU) technology significantly reduces transportation costs through the molten sulfur bonding mechanism, it still lacks systematic verification in terms of material durability, structural reliability and construction feasibility in extreme environments. Existing research focuses on the optimization of single material performance, and there is still a gap in the study of structural failure mechanisms under composite stress fields (negative pressure, radiation, temperature cycles). In addition, as an emerging construction method, although 3D printing technology can process materials layer by layer, it requires a flat site, ground treatment and continuous construction, and has problems such as high processing cost, low manufacturing precision and high energy consumption. The one-time supply of materials also limits the size of the building space. Summary of the invention

[0004] In view of the problems of strong material dependence, low construction efficiency and insufficient environmental adaptability in the construction of Martian building structures in the prior art, the present invention proposes a construction method for preparing Martian bricks and Martian mortar by simulating Martian in-situ resources and building building structures. The method prepares Martian bricks by utilizing the hydration reaction of Martian soil and water-ice mixture under high pressure conditions, prepares Martian mortar by combining molten sulfur and simulated Martian soil, and improves the bonding strength by interface optimization treatment, thereby finally realizing the intelligent construction of building structures.

[0005] The present invention adopts the following scheme: A method for simulating the construction of a Martian building based on Martian in-situ resources, using a pressure mold to prepare Martian bricks as building materials, the pressure mold comprising a base, a plurality of threaded power rods connected to the base, and an outer mold suitable for filling materials, and also comprising a punch head suitable for extending into the outer mold to punch materials, the punch head being connected to an upper pressing plate suitable for being connected to a press, the upper pressing plate being provided with a plurality of through holes suitable for the power rods to pass through, and the power rods being provided with an adjusting nut located below the upper pressing plate; comprising the following steps: S1. Filling: Filling the simulated Martian soil and water ice into the cavity of the outer mold; S2. Assembly: After the filling is completed, the punch head is inserted into the outer mold, so that the power rod passes through the hole on the upper pressing plate, and the locking nut is screwed into the upper part of the upper pressing plate; S3, pressurization: The pressure head of the press machine contacts the upper surface of the upper platen and applies downward pressure to the upper platen, driving the punch head connected to the upper platen to move downward along the power rod, and transmitting the pressure to the filling material in the outer mold; S4. Curing: After reaching the predetermined pressure, tighten the adjusting nut upwards and tighten the locking nut downwards to fix the upper pressing plate at the corresponding position of the power rod, then remove the pressure die from the press and let it stand for curing; S5. Prepare Martian mortar: put sulfur and simulated Martian soil into a magnetic stirrer, heat and stir thoroughly; S6. Construction: Take out the Martian bricks cured and formed in step S4, and use the Martian bricks and the Martian mortar prepared in step S5 to build the Martian building structure.

[0006] Furthermore, the simulated Martian soil is at least one of JSC Mars-1, JMSS-1, MGS-1, MMS-1, and JEZ-1.

[0007] Further, in step S4, the pressure applied by the press to the upper platen is in the range of 20MPa-60MPa.

[0008] Furthermore, during construction in step S6, a straight cut or a cross cut is made on the model layer at the connection interface of the Mars bricks.

[0009] Furthermore, the mass ratio of simulated Martian soil and sulfur was 0:1~1:4, and the heating temperature was 140°C.

[0010] Furthermore, the mass ratio of water ice and simulated Martian soil is 1:3~7:13.

[0011] Furthermore, a numerical model of the compressive strength of Mars bricks and the curing age, molding pressure, temperature, moisture content, and SiO2 particle size conditions was established: Under the conditions of 1 standard atmospheric pressure, room temperature of 20℃, moisture content of 35%, SiO2 particle size of 1um, and different curing ages, the compressive strength formula is: ; (1) in, f u is the compressive strength; D For age; Under the conditions of curing age of 7 days, room temperature of 20℃, moisture content of 35%, SiO2 particle size of 1um and different molding pressures, the compressive strength formula is: ; (2) ; (3) ; (4) ; (5) in f u is the compressive strength, which is equal to the ultimate compressive strength f u_c ; P is the molding pressure; ε 0 is the peak strain; E c is the elastic modulus; is stress, For strain; Under the conditions of curing age of 7 days, room temperature of 20℃, moisture content of 35%, molding pressure of 40MPa and different SiO2 particle sizes, the compressive strength formula is: ; (6) in, f u is the compressive strength; Eq (2) is formula (2); Under the conditions of curing age of 7 days, moisture content of 35%, molding pressure of 40MPa, SiO2 particle size of 200nm and different temperature treatment conditions, the compressive strength formula is: ; (7) in, f u is the compressive strength; Eq (6) is formula (6), T For processing temperature; Under the conditions of curing age of 7 days, room temperature of 20℃, molding pressure of 40MPa, SiO2 particle size of 200nm and different moisture contents, the compressive strength formula is: ; (8) in, f u is the compressive strength; Eq (7) is formula (7), ω is the moisture content.

[0012] Furthermore, JSC Mars-1 was used to simulate Martian soil to prepare Martian bricks under the conditions of 40 MPa molding pressure, 20 °C ambient temperature, 200 nm SiO2 particle size raw material, and 35% moisture content.

[0013] Furthermore, in step S6, intelligent construction technology is used to lay Martian bricks to build a Martian building.

[0014] Beneficial effects: The technical solution of the present invention realizes the following innovative features: In-situ resource utilization: Make full use of Martian soil and water ice without relying on Earth for supplies, significantly reducing transportation costs.

[0015] Efficient construction: Separating component prefabrication and construction improves flexibility and efficiency, making it suitable for large-scale building construction.

[0016] Low energy consumption: Through high-pressure molding technology and interface optimization, energy consumption is greatly reduced to meet the needs of extreme environments.

[0017] High adaptability: Suitable for a variety of simulated Martian soils, capable of achieving reliable performance under different particle sizes and environmental conditions.

[0018] Reliable performance: Through experimental verification and mathematical modeling, the stability of materials under different conditions is ensured, providing technical support for deep space exploration.

[0019] Through the above technical solution, the sustainable construction of Martian building structures has been achieved. The method breaks through the limitations of traditional 3D printing technology and uses Martian in-situ resources to achieve low-energy consumption and highly adaptable building structure construction, which has important application value in deep space exploration. In the future, by further optimizing process parameters and expanding application scenarios, we can promote the long-term residence of humans on Mars and other extraterrestrial planets and infrastructure construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three-dimensional schematic diagram of a pressure mold for simulating a method for building a Martian building based on Martian in-situ resources according to an embodiment of the present invention; Figure 2 is a side schematic diagram of a pressure mold for simulating a method for building a Martian building based on Martian in-situ resources according to an embodiment of the present invention; Figure 3 is a side schematic diagram of another pressure mold for simulating a method for building a Martian building based on Martian in-situ resources according to an embodiment of the present invention; Figure 4 is a schematic top view of a pressure mold for simulating a method for building a Martian building based on Martian in-situ resources according to an embodiment of the present invention; Figure 5 The present invention provides a preparation process of Martian bricks that simulates a method for building Martian buildings based on Martian in-situ resources. Figure 6 The present invention provides a preparation process of Martian mortar for simulating a method for building Martian buildings based on Martian in-situ resources; Figure 7 is a test curve diagram of different material groups of Martian bricks for simulating a method for building Martian buildings based on Martian in-situ resources in an embodiment of the present invention; Figure 8 This is a test curve diagram of different age groups of Martian bricks for simulating a method for building Martian buildings based on Martian in-situ resources according to an embodiment of the present invention; Fig. 9 This is a test curve diagram of different forming pressure groups of Martian bricks in a method of simulating the construction of Martian buildings based on Martian in-situ resources in an embodiment of the present invention; Fig.10 This is a test curve diagram of different particle size groups of Martian bricks for simulating a method for building Martian buildings based on Martian in-situ resources in an embodiment of the present invention; Fig.11 is a test curve diagram of different temperature groups of Martian bricks in a method of simulating the construction of Martian buildings based on Martian in-situ resources in an embodiment of the present invention; Fig.12 This is a test curve diagram of different moisture content groups of Martian bricks in a method for simulating the construction of Martian buildings based on Martian in-situ resources in an embodiment of the present invention; Fig.13 Schematic diagram of different interface cutout types and test loading diagram of a method for simulating the construction of a Martian building based on Martian in-situ resources according to an embodiment of the present invention; Fig.14 It is a test schematic diagram of different interface cutout shapes for simulating a method for building a Martian building based on Martian in-situ resources in an embodiment of the present invention.

[0021] Figure numerals: base 1, fixing nut 2, outer mold 3, power rod 4, adjusting nut 5, punch head 6, upper pressure plate 7, gasket 8, locking nut 9, bolt 10. DETAILED DESCRIPTION

[0022] Example 1 Combination Figures 1 to 14 As shown, this embodiment provides a method for simulating the construction of a Martian building based on Martian in-situ resources, using a pressure mold to prepare Martian bricks as building materials, the pressure mold comprising a base 1, a plurality of threaded power rods 4 connected to the base 1, and an outer mold 3 suitable for filling materials, and also comprising a punch head 6 suitable for extending into the outer mold 3 to punch the material, the punch head 6 is connected to an upper pressing plate 7 suitable for being connected to a press, the upper pressing plate 7 is provided with a plurality of through holes suitable for the power rods 4 to pass through, and the power rod is provided with an adjusting nut 5 located below the upper pressing plate 7; comprising the following steps: S1. Filling: Fill the simulated Martian soil and water ice into the cavity of the outer mold 3, wherein the simulated Martian soil can be at least one of the existing JSC Mars-1, JMSS-1, MGS-1, MMS-1, JEZ-1, and real Martian soil that can be used in the future; the mass ratio of water ice to simulated Martian soil is 1:3~7:13, preferably 7:13, which can ensure a certain strength while having good operability / machinability. The filling density can be adjusted according to actual needs to control the final material properties; the water ice is used as the water source for the hydration reaction, and is converted into liquid water through high pressure to drive the hydration reaction.

[0023] S2, assembly: After filling, insert the punch head 6 into the outer mold 3, pass the power rod 4 through the hole on the upper platen 7, and screw the locking nut 9 on the upper platen 7; raise the position of the adjusting nut 5 in the middle of the power rod 4 to a certain distance for position limiting protection to ensure the stability of the device during the pressure application process. The power rod 4 adopts a spiral steel bar structure with high strength and good pressure transmission ability.

[0024] S3. Pressurization: The ram of the press contacts the upper surface of the upper platen 7 and applies downward pressure to the upper platen 7, driving the punch head 6 connected to the upper platen 7 to move downward along the power rod 4, and transmitting the pressure to the filling material in the outer mold 3; set the corresponding loading system and molding pressure according to the material properties to ensure that the material is fully compacted.

[0025] S4, curing: after reaching the predetermined pressure, tighten the adjusting nut 5 upwards, tighten the locking nut 9 downwards to fix the upper pressing plate 7 at the corresponding position of the power rod, and then remove the pressure mold from the press and let it stand for curing; the pressure range of the press on the upper pressing plate 7 is 20MPa-60MPa, preferably 40MPa, to achieve the maximum densification effect of the material. Under high pressure, ice can melt into liquid water to drive the hydration reaction. After standing and curing, take out the mold to realize flow manufacturing. The curing process ensures that the hydration reaction is fully completed by maintaining constant pressure and temperature conditions; after curing, a Mars brick with a compressive strength of 21.7MPa can be formed; S5. Prepare Martian mortar: put sulfur and simulated Martian soil into a magnetic stirrer, heat and stir thoroughly; the mass ratio of simulated Martian soil to sulfur is 0:1 to 1:4, preferably 1:4; the heating temperature is 140°C; S6. Construction: Take out the Martian bricks cured and formed in step S4, and use the Martian bricks and the Martian mortar prepared in step S5 to build the Martian building structure. Combined with intelligent construction technology, Martian bricks and Martian mortar are used to complete the construction of the Martian building structure; intelligent construction technology includes existing robotic arm automatic masonry and modular assembly solutions, which significantly improve construction efficiency and precision. For example, the robotic arm can achieve rapid positioning of Martian bricks and mortar components through precise control, and the modular assembly solution allows prefabricated components to be flexibly spliced ​​on site, reducing dependence on environmental conditions. In addition, since the sulfur mortar is less exposed in the Martian building structure, the impact of sulfur sublimation on the structure can be effectively reduced, further extending the service life of the building.

[0026] It should be noted that during masonry, incisions can be made on the interface of the Mars bricks. By optimizing the interface incision treatment (such as a straight incision or a cross incision), the bonding strength can be increased to 2.0MPa, which can reduce the impact of sulfur sublimation on the structure.

[0027] The process method of this embodiment can be applied to the construction of future Martian building structures. The Martian bricks can be made using different simulated Martian soils and future real Martian soils, and the Martian mortar can also be made by hot mixing different simulated Martian soils with sulfur. The compaction-based hydration process is expected to allow for a wider use of Martian soil, regardless of particle size, to further simplify the construction process and have a wide range of applicability.

[0028] The simulated Martian soil contains , , , , , When preparing the Martian mortar, the simulated Martian soil includes , , , The sulfur is first heated to melt at 140°C, and then added into the simulated Martian soil and stirred thoroughly. Finally, it is heated to 140°C in an oven. The sulfur melts under the heating condition and is evenly mixed with the simulated Martian soil to form a Martian mortar with good bonding properties.

[0029] In this embodiment, the pressure mold includes a base 1, an outer mold 3 for placing materials, a power rod (made of spiral steel bars) 4, a punch head 6, an upper pressing plate 7, a gasket 8 arranged between a locking nut 9 and the upper pressing plate 7, a fixing nut for fixing the power rod 4 on the base 1, an adjusting nut 5 arranged below the upper pressing plate 7, and a locking nut 9 arranged above the upper pressing plate. The locking nut 9 is locked above the power rod 4 after the upper pressing plate 7 is inserted into the power rod 4. The base 1 includes two schemes. The first scheme ( Figure 2 ): The power rod 4 is fixed to the base 1 and is reinforced by fixing the nut 2 above the base 1; the second type ( Figure 3 ): The power rod 4 is connected to the base 1 through the fixing nut 2 under the base 1. The upper pressing plate 7 may be provided with a bolt 10 for connecting with the press. The pressure mold has a simple and practical structure, is easy to make and has a wide range of application scenarios; Mars bricks of different shapes can also be formed by changing the inner cavity shape of the outer mold 3.

[0030] The method of this embodiment uses compression and heat treatment as the main processes because they require relatively simple equipment compared to the complex 3D printing or sintering technologies currently under study.

[0031] Nanomaterials are abundant in Martian soil simulants, such as the Martian soil simulant JSC Mars-1a. When nanoparticle iron oxides and hydroxides with large specific surface areas are contacted and compacted, the desired chemical bonding can be achieved. The material compaction process will provide the required pressure to melt the ice into liquid water, thereby properly hydrating the mixture to form structural elements. In addition, liquid water can bind aggregates together through capillary tension and inter-particle attraction. At the same time, under the action of liquid water, compacting the aggregate mixture also helps to reorient the aggregate particles to a denser state and bring them into closer contact, resulting in a stronger bond for the structural elements. The compaction-based hydration process is expected to allow for a wider use of Martian soil, regardless of particle size, to further simplify the construction process. For example, designing special Lego-style components to achieve the required mortise and tenon mechanism will further simplify the printing process by minimizing the need for mortar to bond bricks. This indicates that the construction process is faster and more suitable for the Martian atmosphere. Small amounts of sulfur can also be melted as "mortar" to bond Martian bricks. The lower sulfur consumption will result in less energy required to melt, greater resistance to freeze-thaw and sublimation, and less exposure compared to existing sulfur concrete technology.

[0032] Example 2 This embodiment provides a method for simulating the construction of Martian buildings based on Martian in-situ resources, and establishes a numerical model of the compressive strength of Martian bricks and the curing age, molding pressure, temperature, moisture content, and SiO2 particle size conditions: Under the conditions of 1 standard atmospheric pressure, room temperature of 20℃, moisture content of 35%, SiO2 particle size of 1um, and different curing ages, the compressive strength formula is: ; (1) in, f u is the compressive strength; D For age; Under the conditions of curing age of 7 days, room temperature of 20℃, moisture content of 35%, SiO2 particle size of 1um and different molding pressures, the compressive strength formula is: ; (2) ; (3) ; (4) ; (5) in f u is the compressive strength, which is equal to the ultimate compressive strength f u_c ; P is the molding pressure; ε 0 is the peak strain;E c is the elastic modulus; is stress, For strain.

[0033] Under the conditions of curing age of 7 days, room temperature of 20℃, moisture content of 35%, molding pressure of 40MPa and different SiO2 particle sizes, the compressive strength formula is: ; (6) in, f u is the compressive strength; Eq (2) is formula (2); Under the conditions of curing age of 7 days, moisture content of 35%, molding pressure of 40MPa, SiO2 particle size of 200nm and different temperature treatment conditions, the compressive strength formula is: ; (7) in, f u is the compressive strength; Eq (6) is formula (6), T For processing temperature; Under the conditions of curing age of 7 days, room temperature of 20℃, molding pressure of 40MPa, SiO2 particle size of 200nm and different moisture contents, the compressive strength formula is: ; (8) in, f u is the compressive strength; Eq (7) is formula (7), ω is the moisture content; According to the above numerical model, under given corresponding conditions, Mars bricks with different compressive strengths can be obtained by controlling the single numerical changes of the curing age, molding pressure, temperature, moisture content, and SiO2 particle size parameters, and vice versa. For example, under the given curing age of 7 days, room temperature of 20°C, molding pressure of 40MPa, and SiO2 particle size of 200nm, different moisture contents can be controlled to obtain Mars bricks with different compressive strengths.

[0034] Example 3 In this embodiment, JSC Mars-1 simulated Martian soil was used to prepare Martian bricks and Martian mortar by simulating the method of building Martian buildings based on Martian in-situ resources under the conditions of 40MPa molding pressure, 20°C ambient temperature, 200nm SiO2 particle size raw material and 35% moisture content, and three interface treatment processes (no incision, straight incision, cross incision) were used to optimize the bonding strength. Figure 10-11 As shown, under this condition, the compressive strength of the precast brick body is about 21.7MPa, and after high-temperature curing treatment at 1000℃, the maximum compressive strength can reach 44.5MPa.

[0035] Verify by the following method: like Fig.13 First, two cubic specimens were bonded with a sulfur-based adhesive made of molten sulfur. After the specimens were fully bonded, two long iron blocks were fixed on both sides of the specimens using epoxy resin glue. The span between the two loading points was 34 mm, and the distance from the support point to the nearest loading point was 33 mm. A displacement rate of 0.006 mm / min was applied to the sample, and the load and displacement data were collected by the internal force sensor and LVDT system, respectively.

[0036] Test data ( Fig.14 ) showed that the uncut specimens failed due to interface debonding, with an average bond strength of only 1.0MPa; while the straight cut and cross cut specimens showed a failure mode of brick body fracture, indicating that the interface bond strength has exceeded the material's own strength limit. The average bond strength of the straight cut and cross cut treatments increased to 2.0MPa and 1.6MPa, respectively, and the enhancement mechanism may be due to the mechanical interlocking effect of the interface.

[0037] comprehensive Fig.14 According to the data, the straight incision becomes the preferred solution because it is easy to prepare and the bonding strength exceeds 2.0MPa, which provides an important basis for optimizing the bonding performance of structural materials through interface treatment technology.

[0038] Through this embodiment, the sustainable construction of Martian building structures is achieved. The method breaks through the limitations of traditional 3D printing technology and uses Martian in-situ resources to achieve low-energy consumption and highly adaptable building structure construction, which has important application value in deep space exploration. In the future, by further optimizing process parameters and expanding application scenarios, it will help promote the long-term residence of humans on Mars and other extraterrestrial planets and infrastructure construction.

[0039] It should be understood that the above are only preferred implementations of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention.

[0040] The above description of the drawings used in the implementation manner only illustrates certain embodiments of the present invention and should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

Claims

1. A method for simulating the construction of Martian buildings based on Martian in-situ resources, characterized in that: A pressure mold is used to prepare Mars bricks as building materials, wherein the pressure mold includes a base, a plurality of threaded power rods connected to the base, and an outer mold suitable for filling materials, and also includes a punch head suitable for extending into the outer mold to punch the material, the punch head is connected to an upper pressing plate suitable for connecting to a press, the upper pressing plate is provided with a plurality of through holes suitable for the power rods to pass through, and the power rod is provided with an adjusting nut located below the upper pressing plate; the steps include: S1. Filling: Filling the simulated Martian soil and water ice into the cavity of the outer mold; S2. Assembly: After the filling is completed, the punch head is inserted into the outer mold, so that the power rod passes through the hole on the upper pressing plate, and the locking nut is screwed into the upper part of the upper pressing plate; S3, pressurization: The pressure head of the press machine contacts the upper surface of the upper platen and applies downward pressure to the upper platen, driving the punch head connected to the upper platen to move downward along the power rod, and transmitting the pressure to the filling material in the outer mold; S4. Curing: After reaching the predetermined pressure, tighten the adjusting nut upwards and tighten the locking nut downwards to fix the upper pressing plate at the corresponding position of the power rod, then remove the pressure die from the press and let it stand for curing; S5. Prepare Martian mortar: put sulfur and simulated Martian soil into a magnetic stirrer, heat and stir thoroughly; S6. Construction: Take out the Martian bricks cured and formed in step S4, and use the Martian bricks and the Martian mortar prepared in step S5 to build the Martian building structure.

2. The method for simulating the construction of Martian buildings based on Martian in-situ resources according to claim 1, characterized in that: The simulated Martian soil is at least one of JSC Mars-1, JMSS-1, MGS-1, MMS-1, and JEZ-1.

3. The method for simulating the construction of Martian buildings based on Martian in-situ resources according to claim 1, characterized in that: In step S4, the pressure applied by the press to the upper platen is in the range of 20MPa-60MPa.

4. The method for simulating the construction of Martian buildings based on Martian in-situ resources according to claim 1, characterized in that: During construction in step S6, a straight cut or a cross cut is made on the model layer at the connection interface of the Mars bricks.

5. The method for simulating the construction of Martian buildings based on Martian in-situ resources according to claim 1, characterized in that: The mass ratio of simulated Martian soil and sulfur is 0:1~1:4, and the heating temperature is 140℃.

6. The method for simulating the construction of Martian buildings based on Martian in-situ resources according to claim 1, characterized in that: The mass ratio of water ice and simulated Martian soil is 1:3~7:

13.

7. The method for simulating the construction of Martian buildings based on Martian in-situ resources according to claim 1, characterized in that: A numerical model of the compressive strength of Mars bricks and the curing age, molding pressure, temperature, moisture content, and SiO2 particle size conditions was established: Under the conditions of 1 standard atmospheric pressure, room temperature of 20℃, moisture content of 35%, SiO2 particle size of 1um, and different curing ages, the compressive strength formula is: ；(1) in, f u is the compressive strength; D For age; Under the conditions of curing age of 7 days, room temperature of 20℃, moisture content of 35%, SiO2 particle size of 1um and different molding pressures, the compressive strength formula is: ；(2) ；(3) ；(4) ；(5) in f u Equal to the ultimate compressive strength f u_c ; P is the molding pressure; ε 0 is the peak strain; E c is the elastic modulus; is stress, For strain; Under the conditions of curing age of 7 days, room temperature of 20℃, moisture content of 35%, molding pressure of 40MPa and different SiO2 particle sizes, the compressive strength formula is: ；(6) in, Eq (2) is formula (2); Under the conditions of curing age of 7 days, moisture content of 35%, molding pressure of 40MPa, SiO2 particle size of 200nm and different temperature treatment conditions, the compressive strength formula is: ；(7) in, Eq (6) is formula (6), T For processing temperature; Under the conditions of curing age of 7 days, room temperature of 20℃, molding pressure of 40MPa, SiO2 particle size of 200nm and different moisture contents, the compressive strength formula is: ；(8) in, Eq (7) is formula (7), ω is the moisture content.

8. The method for simulating the construction of Martian buildings based on Martian in-situ resources according to claim 1, characterized in that: Martian bricks were prepared using JSC Mars-1 simulated Martian soil under the conditions of 40 MPa molding pressure, 20 °C ambient temperature, 200 nm SiO2 particle size raw material and 35% moisture content.

9. The method for simulating the construction of Martian buildings based on Martian in-situ resources according to claim 1, characterized in that: In step S6, the Martian bricks are laid using intelligent construction technology to build a Martian building.

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