266 results about "Soil material" patented technology

The invention relates to the technical field of tunnel engineering, and discloses a tunnel multi-field coupling nonlinear deformation analysis method and system.The method comprises the steps that geological environment information of a tunnel area is collected, a multi-source physical field boundary condition model is built based on collected data, and a heat-seepage-stress-time four-field coupling control model is built based on the collected data; specifying a nonlinear response model for the geological medium to truly reflect the stress-strain behavior of the geotechnical material; solving a coupling equation set, and optimizing the four-field coupling control model; introducing measured data to correct the model; the system comprises a geological data acquisition module, a boundary condition modeling module, a coupling model establishment module, a numerical solution module, a measured data correction module and a visual output and control interface module. According to the method, high-fidelity prediction and evolution analysis of the deformation behavior of the tunnel under the complex geological condition are realized based on comprehensive acquisition of the geological environment, multi-field boundary modeling, control equation construction and numerical calculation.

The invention provides a flow-state solidified soil mixing construction method based on automatic adjustment of proportioning parameters, belongs to the technical field of flow-state solidified soil, and realizes intelligent control of a flow-state solidified soil mixing process by establishing a three-section type precise screening and stirring system and a high-precision automatic control system. According to the method, firstly, target performance parameters are input, and an optimal matching scheme is automatically selected through a multi-target optimization algorithm; starting an original soil treatment unit to perform soil material dispersion treatment and measuring the physical characteristics of the soil material; adding the raw materials according to the accurate measurement, and fully mixing; when it is detected that the performance of the mixture deviates from a target value, the system automatically triggers a parameter compensation mechanism for adjustment; and meanwhile, a material ratio fluctuation early warning system is established, so that uneven mixture quality caused by starting and stopping of equipment or material conveying delay is avoided, and the technical problem that in the prior art, matching parameters are difficult to accurately regulate and control in real time in the mixing process of the flow-state solidified soil is solved.

The utility model belongs to the technical field of carbon molecular sieve production equipment, and discloses a flower mud material crushing conveyor line which comprises crushing equipment, a bottom belt conveyor, an inclined lifting belt conveyor and a vibrating screen, a sunken main pit is formed in the workshop ground of a flower mud crushing station, the crushing equipment is installed in the main pit, and the inclined lifting belt conveyor is installed in the main pit. A feeding hopper of the crushing equipment is removed towards the outer side wall, and the bottom of the feeding hopper is connected through a horizontal steel plate, extends and is connected to the workshop ground in a lap joint mode. The bottom belt conveyor is horizontally connected below a discharge port of the crushing equipment, the bottom end of the inclined lifting belt conveyor is connected at the discharge end of the bottom belt conveyor, and the high end of the inclined lifting belt conveyor inputs crushed flower mud materials to a feed port of the vibrating screen. According to the flower mud material crushing conveying line, crushing equipment is installed in a pit mode, the feeding difficulty is lowered, and the operation safety is improved.

The invention relates to the technical field of geotechnical material local modeling, in particular to a geotechnical material data driving local modeling method and device based on a knowledge migration strategy, and the method comprises the steps: building a first mapping data pair based on the stress-strain physical quantity of a test curve sampling point, and building a high-fidelity data set of a geotechnical material; constructing a second mapping data pair based on the stress-strain state of the simulation curve sampling point and the intermediate physical quantity label, and establishing a low-fidelity data set of the geotechnical material; pre-training the target data-driven constitutive model by using the low-fidelity data set to generate an initial geotechnical material data-driven constitutive model; and driving the model to be fine-tuned by using the high-fidelity data set for the initial geotechnical material data, and generating final geotechnical material data to drive the model. Therefore, the problem of insufficient generalization ability and prediction precision of a data-driven model due to limited training data and unpredictability of a stress path in the prior art is solved.

The invention relates to the technical field of slope engineering parameter inversion, in particular to a rock-soil mass parameter probability inversion analysis method based on constrained Bayesian updating, which comprises the following steps: determining prior distribution of slope rock-soil mass parameters, and constructing a slope monitoring data likelihood function; constructing a target constraint likelihood function according to the target constraint condition; combining prior distribution, a slope monitoring data likelihood function and a target constraint likelihood function by using a Bayesian theory to determine posterior distribution of rock-soil body parameters, thereby determining equivalent samples of the rock-soil body parameters by using a target sampling algorithm, and updating reliable indexes of a target slope by using the equivalent samples, thereby improving the reliability of the target slope. And obtaining the updated slope reliability index. Therefore, the problems that the traditional Bayesian inference in the related technology is mainly used for inverting the geotechnical material parameters by fusing the monitoring data, and when the types and the number of the monitoring data are limited, the traditional Bayesian inference is often uncertain, the inversion stability is poor, and the uncertainty of the geotechnical material parameters cannot be effectively reduced are solved.

The invention relates to the field of flow-state solidified soil testing devices, and particularly discloses an offshore wind turbine flow-state solidified soil anti-dispersion and anti-scouring integrated testing device which comprises a reservoir, an anti-dispersion testing mechanism and an anti-scouring testing mechanism. The anti-dispersion test mechanism is a transparent cuboid groove, a water outlet in the tail end of the anti-dispersion test mechanism faces an inner cavity of the water storage tank, a concave test groove formed in the bottom face of the cuboid groove is formed in the inner side of the water outlet, and the head end of the cuboid groove is in circulating connection with the water storage tank through a pump body. The anti-scouring test mechanism comprises a reducing pipe, a horizontal flow pipe, a test piece pipe, a guide plate, a loading cylinder, a screw rod, a driving motor and a range finder. The testing device can accurately simulate the high-speed water flow environment around a fan pile, and meanwhile, the anti-dispersion and anti-scouring performance test of the flow-state solidified soil and the coupling test device of an offshore fan are carried out, so that more scientific and reliable technical support is provided for research, development and test of the material of the flow-state solidified soil.

The invention relates to the technical field of geotechnical engineering intelligence, in particular to a multi-field coupling intelligent triaxial test method and system combined with machine learning, and the method comprises the following steps: initializing a test device, and establishing a material parameter prior distribution function; defining a target test path and obtaining a target control sequence; acquiring real-time test data through a multi-source fusion sensing array, and preprocessing the real-time test data to obtain multi-dimensional feature fusion data; establishing an online parameter identification module to obtain real-time correction material parameters; establishing a heat-water-force multi-field coupling prediction model to obtain an optimal control sequence; acquiring latest test data, and performing rolling optimization on the model to establish a lightweight control model; and generating an intelligent control instruction to realize self-adaptive intelligent control of the triaxial test. According to the invention, through combination with machine learning, the spanning of the triaxial test from experience control to intelligent control is realized, and an intelligent technical means is provided for the research of the multi-field coupling characteristic of the geotechnical material.

The invention is applicable to the technical field of road construction, and provides a digging and filling method for highway subgrade construction, which comprises the following steps: T1, carrying out construction operation according to a construction drawing, digging a pavement through a digging machine to form a groove, and piling dug soil on the ground on two sides of the groove; t2, the grooves are evenly filled with filling materials such as stone, coal cinder and gravel; t3, the road roller is controlled to slowly move along the foundation pit, a soil returning device at the front end of the road roller is used for backfilling soil on the two sides of the foundation pit, and a compaction steel wheel at the rear end of the road roller is used for compacting the backfilled groove; the soil returning device comprises a fixing assembly and a backfilling assembly arranged on the fixing assembly in a sliding mode. According to the method, the rotating shaft is controlled to rotate to drive the two sets of spiral conveying blades with opposite spiral directions to synchronously rotate, most of soil on the two sides of the groove is conveyed into the groove, the two sets of bulldozing plates are driven to push the residual coating into the groove through linkage of all the parts, and the backfilling efficiency is improved.

The invention provides a method for adjusting the moisture content of a tackified soil material yard, and belongs to the technical field of water conservancy and hydropower engineering construction. Calculating the unit water supplementing amount required by the unit volume of cohesive soil in each partition; calculating the total water supplementing amount required by the cohesive soil in each subarea; the number of water supplementing pits in each partition is determined; a plurality of water replenishing pits are uniformly arranged in each subarea; and the multiple arranged water supplementing pits are filled with water, mining is carried out after the water supplementing pits are placed for 2-5 days, mixing is carried out while mining is carried out, and the mixture is loaded and transported to a filling site after uniform mixing. According to the method, the water supplementing pit is arranged in situ in the mining material field, blending is carried out while mining is carried out, the uniformly-blended cohesive soil is directly loaded and transported to the filling field for use, the construction procedure is simple, a temporary soil material stacking field does not need to be additionally developed, secondary soil material transferring is not needed, and the treatment cost is saved; and the moisture content of the soil material increased by the method is close to the optimal moisture content, the humidity is uniform, and the quality of the soil material can be effectively improved.

The invention discloses a transparent soil vibration table pile type reinforced embankment working property simulation method, and relates to the technical field of geotechnical engineering. In order to solve the problem of internal visualization of working properties of an existing pile-supported reinforced embankment, the following technical scheme is provided: S1, adjusting and fixing a slope simulator; s2, realizing transparency of a soil body material; s3, filling a transparent reinforced embankment; s4, installing and fixing observation equipment; and S5, simulating rainfall, earthquakes and train loads. The transparent soil vibration table pile type reinforced embankment working property simulation method and scheme have the remarkable beneficial effects in the aspects of internal visual simulation, controllability and reducibility, instrument operation simplicity and convenience, comprehensive benefits and the like.

The invention relates to the technical field of roadbed materials, and provides a Bayer process red mud roadbed material and a preparation method thereof.The Bayer process red mud roadbed material is prepared from, by weight, 100 parts of Bayer process filter pressing red mud, 1-30 parts of modified fly ash, 50-150 parts of a soil material, 2-10 parts of an accelerant and 0.01-0.8 part of a dispersing agent; wherein the modified fly ash is prepared from the following raw materials: fly ash, a silane coupling agent and 4-(2-hydroxyethoxy) benzaldehyde, and through the technical scheme, the problem that the Bayer process red mud roadbed material in the prior art is low in impermeability and mechanical property is solved.

The invention discloses a reservoir dam body stability monitoring method and device and a medium, and belongs to the technical field of dam monitoring. The method comprises the steps that basic size parameters and layered soil material parameters of a dam body in a design drawing are obtained; processing the data based on an infiltration analysis model to generate a dam body cross-section diagram and a layered soil structure model; processing the layered soil structure model through an infiltration line generation algorithm, and generating an early warning infiltration line; marking a real-time water level point in the dam body cross-section diagram according to the dam body water level data, and generating a real-time infiltration line; comparing the real-time infiltration line with the early-warning infiltration line to calculate a deviation distance between the real-time infiltration line and the early-warning infiltration line; if the deviation distance exceeds the safety threshold value, an alarm signal is triggered, and a dam body stability evaluation report is generated and transmitted to a preset terminal. Through the method, whether the dam is stable or not can be judged according to simple data.

The invention discloses a preparation device and method for flow-state solidified soil, the preparation device comprises a stirring assembly (4) arranged on a high-pressure water source output port and a mixing assembly (3) arranged between the high-pressure water source output port and the stirring assembly (4), through the stirring assembly (4), stirring and mixed powder wet treatment is carried out on a soil material, a curing agent and an additive, and through the mixing assembly (3), the soil material, the curing agent and the additive are subjected to wet treatment. According to the invention, mixing treatment of a soil material subjected to wet treatment of mixed powder, a curing agent and an additive in a water flow state environment is realized, preparation of flow-state solidified soil is realized in mixing treatment of a high-speed double-hedging component, and the technical problem that solidified soil mixing is realized by using a concrete mortar mixer truck is solved; therefore, the preparation effect of the solidified soil is improved.

The soil carbonate content measuring device comprises a box body and a screening assembly, the screening assembly comprises a discharging port formed in the top end of the box body, a V-shaped plate is fixedly connected into the box body, two filter grooves are formed in the V-shaped plate, the two filter grooves are evenly distributed on the two sides of the V-shaped plate respectively, and the two filter grooves are not communicated; a sliding frame is slidably clamped at the bottom end of one side of the V-shaped plate, a plurality of push blocks are arranged at the top end of the sliding frame, each push block is slidably clamped in one filter tank, a supporting arm is arranged on the outer side of the box body, a clamping block is connected to the inner side of the supporting arm through a telescopic rod, a guide block is arranged on one side of the sliding frame, and the clamping block is clamped on the outer side of the guide block; the screening assembly and the metering assembly arranged in the device can be used for pretreating soil to be tested, on one hand, impurities such as stones and branches in a soil material can be removed, on the other hand, the content of carbonate in the soil can be preliminarily measured, and then the experiment time of operators is saved.

The invention relates to the field of flow-state solidified soil testing devices, and particularly discloses construction equipment and a construction process for scouring and repairing flow-state solidified soil for an offshore wind turbine foundation. Comprising an overwater carrying carrier, and a material mixing pool, a water adding stirring pool, a material conveying pipeline, a material conveying pump, a slurry conveying mechanism, a flow state solidified soil scouring performance testing device, a solidified soil rotational rheometer, a fluidity test bed, a detection material taking mechanism and a control center which are arranged on the carrier. The construction device is a complete technical system covering performance integrated testing, site construction real-time detection and complex environment coupling simulation, the dual problems that research and development of a flow-state solidified soil material is lagged and site repair quality control is insufficient are effectively solved, and the safety and reliability of offshore wind turbine foundation scouring repair engineering are guaranteed.

This invention relates to the field of deep learning technology, specifically to a numerical simulation method for true triaxial tests of coarse-grained soil materials based on principal stress effects. The method includes the following steps: acquiring three-dimensional geological parameters and boundary condition data of the coarse-grained soil material; and constructing a true triaxial finite element simulation model of the coarse-grained soil based on the three-dimensional geological parameters and boundary condition data. This invention utilizes a loading increment step size for trial calculations and calculates the reward function value based on the convergence state and iteration count of the trial calculation results to update the network parameters, enabling the control strategy to continuously evolve through interaction with the environment. This allows for the identification of dangerous regions with highly nonlinear constitutive relations or near-singular stiffness matrices. In these regions, the step size is automatically reduced to ensure computational convergence, while in stable regions, the step size is increased to improve computational efficiency. This solves the problem that traditional fixed step sizes or simple adaptive step sizes easily lead to computational divergence or excessive iterations under complex stress paths.

The invention relates to a trench cutter comprising at least one milling wheel for crushing soil material and a suction box arranged radially adjacent to the milling wheel, the suction box having a base body in which at least one, in particular plate-shaped, clearing element is detachably mounted on a clearing side facing the milling wheel. According to the invention, the support is slidably mounted on the base body along the clearing side. The invention further relates to a method for dismantling the suction box of a trench cutter according to the invention and a method for assembling the suction box of a trench cutter according to the invention.

The application discloses a kind of wind farm fan installation platform foundation precision backfill construction method, it is related to wind power foundation construction technical field, the specific steps of this method are as follows: first, according to drawing line division operation zone and set up storage area;Again, from top to bottom layer excavation screening soil material, side slope synchronous step compaction;From inside to outside partition backfill, set different virtual paving thickness and compaction detection;Each layer covers the outside of step, two-stage step joint place paving gravel reinforcement;Each layer is measured settlement and dynamically adjusts filler parameter;Finally, fine material leveling, surplus material is used for covering soil, vegetation and drainage;The application adopts radial zoning operation and soil grading screening integrated mode, differentiates and matches the stress demand of each area, cooperates with step gravel reinforcement and standard interlayer treatment, improves backfill compaction uniformity, dynamically regulates and controls filler parameter by layer settlement monitoring, actively controls uneven settlement;Surplus material is used for covering soil, vegetation and drainage, realizes quality closed-loop control and green construction.

The invention discloses a modified raw soil material based on copper tailings and a preparation method thereof, and belongs to the technical field of building materials. The performance of a traditional raw soil material is optimized by using an alkali activator solution (prepared from a sodium hydroxide solution and a sodium silicate solution), copper tailings, sodium carboxymethyl cellulose, ceramic fragments and the like, and the reasonable adding amounts of the materials are as follows: 10% of copper tailings, 2% of sodium hydroxide, 4% of sodium silicate, 4% of sodium carboxymethyl cellulose, 4% of ceramic fragments and 0.6% of straw. The mechanical property, the water resistance and the like of the modified immature soil material are obviously improved, the copper tailings can be subjected to reduction, recycling and harmless utilization, the immature soil material has better regeneration value and environmental benefits, and the prepared immature soil material can be effectively applied to the fields of immature soil building reinforcement, cultural relic and ancient building restoration, civil engineering and the like.

The utility model relates to a three -axis sample preparation device with grading limiting function relates to geotechnical mechanics experimental equipment technical field, it includes with centering the lock base for fixed three -piece mould of clamping groove, with the tamping hammer subassembly for tamping treatment to soil material in three -piece mould of hammer head and with the limiting component for the limiting of hammer head moving path of limiting disc and is used to three -piece mould's direction of moving away or close, limiting disc is along the moving direction of hammer head and adjusts position and restricts the moving end position of hammer head in stages, tamping hammer subassembly still includes the guide rod for connecting hammer head of wearing in limiting disc and the limiting baffle ring of setting at the side of guide rod away from hammer head, limiting baffle ring and limiting disc abut and are used for the downstroke of rigid locking hammer head. The utility model has the effect that improves the precision of actual compaction thickness in compaction process.

The utility model discloses a sample preparation device for testing the specific heat capacity of a soil body, which belongs to the technical field of soil body thermophysical property detection equipment, and comprises a main mold, a first mold, a second mold and a third mold, the main mold is integrally cylindrical and split, and is symmetrically divided into a first split body and a second split body along the circumferential direction of the main mold, and the first split body and the second split body are matched with each other; segmentation faces of the first split body and the second split body are correspondingly provided with semicircular-arc-shaped hole seam protrusions respectively, and the hole seam protrusions are correspondingly enclosed to form two cylinders used for generating a probe to be inserted into a hole seam when a soil sample is pressed. The inner diameter of the outer protective cylinder is matched with the outer diameter of the main mold, and the outer protective cylinder is arranged outside the first split body or the second split body in a sleeving mode; and the sample preparation device is used for pressing the soil material between the outer pile casing and the first split body or the second split body. According to the device, the aperture for inserting the probe can be preset in the pressed soil sample, so that the distance error of the probe can be reduced, and the accuracy of testing the specific heat capacity of the soil body by using the DPHP method is improved.

The application provides a device and a method for reducing the water content of excavated soil, which comprises a feeding port, a soil cutting section, a drying section and a discharging port. The feeding port is located above the soil cutting section, and the drying section is horizontally arranged with its inlet end below the soil cutting section. After the high-water-content soil is excavated, it enters the feeding port, falls to the starting end of the conveyor belt of the drying section after being cut into small pieces in the soil cutting section under the action of gravity, and is transported out of the discharging port after being dried by the drying device along the conveying belt, thereby achieving rapid reduction of the water content. The application can be used in cooperation with soil excavation machinery such as excavators to achieve the purpose of continuous operation of excavation-crushing-drying, rapidly reduce the high-water-content soil to meet the requirements of the water content of the engineering material source, and effectively reduce the cost, time cost and secondary loading and unloading cost of the soil material paving and airing site.

The invention relates to the technical field of material conveying, in particular to nutrient soil material suspension type belt conveying equipment. Comprising a fixing plate, the top of the fixing plate is provided with a control module connected with a remote control terminal through the Internet of Things, the top of the fixing plate is rotationally connected with a swing frame through fixing bases, shaft rods are rotationally connected to the swing frame at equal intervals, and the end of the shaft rod on one side penetrates through the adjacent fixing bases. A gear motor drives a shaft rod to enable a conveying flat roller and a conveying inclined roller to rotate, a conveying belt conveys nutrient soil, an electric cleaning roller rotates to clean materials attached to the surface of the conveying belt, and the materials carried on the electric cleaning roller can be cleaned through a carding frame; and the cleaned materials slide down along the inclined surface of the carding frame, so that the problem that the adhesion weight is gradually increased, the load of the speed reducing motor is reduced and the service life is prolonged because the materials adhered to the conveying belt are not cleaned can be avoided.

The invention discloses a structure and a construction method of a solidified soil bending-resistant road, a solidified soil road comprises a road cushion layer, a roadbed layer and a pavement layer from bottom to top, a grid structure is arranged between the roadbed layer and the pavement layer, the grid structure is connected with the roadbed layer through a fixing piece, the road cushion layer is composed of natural soil materials, the roadbed layer is composed of dry-mixed solidified soil, and the roadbed layer is composed of dry-mixed solidified soil. And the pavement layer is formed by pouring fluid solidified soil mixed with fiber substances. According to the structure and the construction method of the stabilized soil bending-resistant road, the grid structure is arranged between the roadbed layer mainly comprising the dry-mixed stabilized soil and the pavement layer mainly comprising the flow-state stabilized soil, and the fiber substances are doped in the flow-state stabilized soil, so that the bending resistance and the crack resistance of the stabilized soil road are improved.

The utility model relates to the technical field of stadium construction, and discloses a filling device based on stadium construction, which comprises a filling mechanism, a vibrating mechanism, a crushing mechanism, a conveying mechanism and a conveying mechanism, the vibrating mechanism comprises a discharging hole, an eccentric wheel, a boss, at least two connecting pieces, at least two elastic pieces and a material conveying hopper, the discharging hole is formed in the crushing mechanism, the discharging hole is formed in the inner wall of the bottom of the crushing mechanism and corresponds to the feeding side of the boss, and the eccentric wheel is arranged on the side face of the crushing mechanism. According to the soil material screening device, the effect of rapidly screening smashed soil materials is achieved through the structure, and the problem that in the prior art, due to the fact that the laid soil materials are caked before being processed, the ground is uneven when the soil materials are conveyed to the ground through a scraper knife is solved.

The utility model relates to the technical field of civil engineering, and discloses a light high-strength flexible static load back pressure structure which comprises a bearing table arranged at the top of a tested pile. A plurality of groups of geotechnical bag main bodies are sequentially stacked on the top of the bearing table; the geotextile bag body is made of flexible materials and is designed to be used for collecting and packaging sand, stone and soil materials on a construction site to form a balance weight, and the geotextile bag body comprises a bag body of an open structure and sealing faces integrally arranged on the four edges of the opening of the bag body. According to the light high-strength flexible static load back pressure structure, local materials can be used through a test area, and field materials can be fully utilized as a device of a counter-force system, so that the cost is saved; and particularly, the advantages on medium and small tonnage static loads in remote areas are obvious, the competitiveness is enhanced, the cost is reduced, the efficiency is improved, and the using effect of the structure is improved.

The invention discloses a geotechnical material constitutive model construction method and system, electronic equipment and a storage medium, and relates to the technical field of geotechnical engineering. The method comprises the following steps: constructing a full strain parameter quantization association network; calculating to obtain a constitutive model parameter initial set capable of achieving complete full-strain mechanical characteristics; and based on the constitutive model parameter initial set, calculating a displacement predicted value and comparing the displacement predicted value with a displacement measured value, when the deviation exceeds a predetermined threshold, starting a traceability adaptive algorithm, and finally determining a constitutive model parameter set of the target geotechnical material. According to the method, the defect that existing constitutive model parameters lack physical and mathematical correlation in a full strain range is effectively overcome, meanwhile, the defect of static curing of the model is overcome by dynamically adjusting constitutive model parameter values, and better engineering prediction precision is achieved with low cost.

The invention discloses a soil mechanics theory-based erosion gully microscopic scale model construction method, which comprises the following steps of: firstly, carrying out field exploration on a target erosion gully to obtain geometric and soil mechanics parameters and meteorological data, and determining a scale proportion according to a similarity theory; preparing a similar soil material from quartz sand, clay and the like, and preparing a model substrate from a fiber reinforced composite material; laying materials layer by layer, implanting fibers, setting a vegetation layer simulation environment, setting boundary conditions and a loading and monitoring system; applying a simulated load, comparing model output with a prototype or theoretical result, determining key parameters by sensitivity analysis, and adjusting and optimizing the model. The model constructed by the method is highly similar to the mechanical behavior and erosion process of an actual erosion gully, soil characteristics can be accurately simulated, data are acquired through reliable monitoring, the accuracy is ensured through scientific calibration and optimization, an effective means is provided for erosion gully research, the research cost is reduced, and high universality is achieved.

The application discloses a kind of non-saturated solidified soil fatigue cracking damage prediction methods based on energy-mechanics method.The application introduces the effective stress formula proposed by Lytton and gives the solution method of relevant parameters in combination with energy-mechanics method, obtains the damage density evolution trend of non-saturated solidified soil material, finally based on the theory of fracture mechanics and continuous damage mechanics, on the basis of Paris equation, introduce damage density function, and based on dissipation strain energy DSE, the expression form of J integral is obtained, so as to establish the damage evolution prediction model capable of characterizing the multi-crack cracking process.The application solves the problem that the previous solidified soil fatigue cracking model cannot effectively reflect the influence of unsaturated characteristics on soil material cracking, and the model is based on the basis of mechanics theory, can better predict the multi-crack fatigue cracking damage evolution process from the mechanism level of non-saturated solidified soil material fatigue cracking, and provides basis and guidance for the design of solidified soil material and solidified soil road structure.

The present invention discloses an apparatus and method for artificially preparing structural soil samples capable of controlling the strength of their structural properties. The apparatus belongs to the field of geotechnical engineering and comprises a low-temperature forming module, a carbonization module, and a terminal device. The method, based on the apparatus, obtains the percentage of pores in each pore size interval of natural loess through a mercury intrusion test, air-dries and crushes the sample, adds CaO, and mixes uniformly. Distilled water is sprayed on the CaO-added soil material and stirred to generate Ca(OH)2, thereby preparing a mixed soil material. Dry ice pellets are prepared based on the percentage of pores in each pore size interval obtained through the mercury intrusion test, mixed uniformly with the mixed soil material, and pressed into a sample of the desired size. The sample is placed in a CO2 environment for curing, and CaCO3 cementation, similar to that of natural loess, is formed between the soil particles. The generated CaCO3 content controls the structural properties by varying the CaO incorporation ratio. Furthermore, the present invention enables non-destructive monitoring of the carbonization process during sample preparation and can control the moisture content of the prepared sample.