46 results about "Soft clay" patented technology

The invention discloses a soft clay electrochemical reinforcing device and method. The device comprises a power source, an anode, a cathode and a middle grouting pipe. A cation exchange membrane is arranged in the area, close to the cathode, of the to-be-reinforced soil body, only allows cations to migrate from the interior of the soil body to the cathode, and physically prevents anions generated by the cathode electrolytic reaction from reversely diffusing to the soil body; and the cation exchange membrane wraps the outer surface of the cathode or is arranged in the soil body around the cathode as an independent interlayer to form an ion filtering interface completely surrounding the cathode. According to the method, a selectively permeable cation exchange membrane is arranged at the interface of a cathode and a soil body, and a step-by-step grouting process of first anode grouting and then middle grouting pipe grouting is combined, so that the displacement of unit energy consumption is remarkably improved under the same voltage, the settlement amount of the soil body in a cathode area is increased by nearly 4 times, and the construction efficiency is improved. The engineering problem that an anode is hard and a cathode is soft in traditional electroosmosis is solved.

This invention relates to the field of nearshore engineering pile extraction technology, and discloses an auxiliary pile extraction device and construction method for soft clay strata in nearshore areas. The device includes at least two hollow annular high-pressure water chamber components, spaced vertically along the axial direction of the pile. Each hollow annular high-pressure water chamber component includes two oppositely arranged hollow arc-shaped high-pressure water chambers and riveting bolts. This auxiliary pile extraction device and construction method for soft clay strata in nearshore areas utilizes multiple high-pressure nozzles arranged on the upper, outer, and lower surfaces of the hollow annular high-pressure water chamber components. The two hollow annular high-pressure water chambers are connected by riveting bolts to form a circular structure around the pile. This allows high-pressure water to be sprayed directionally in three directions around the pile, achieving targeted erosion and drag reduction in specific areas around the pile. This solves the problems of traditional indiscriminate disturbance methods that easily lead to excessive disturbance of soil in non-target areas, instability of surrounding strata, and significant waste of drag-reducing media.

The invention discloses a soft clay cyclic reconsolidation characteristic test method and device, and the method mainly comprises the steps: applying an axial cyclic load, and dynamically adjusting the lateral boundary constraint condition of a sample according to an independent control logic to simulate an actual stress path; synchronously collecting axial deformation, a lateral strain field, pore water pressure and an acoustic emission signal of the sample; and then characteristic parameters are calculated in real time based on the multi-physics field data, and a test process is automatically decided according to a preset criterion. According to the soft clay cyclic reconsolidation characteristic test method and device provided by the invention, the field boundary condition can be simulated more truly, and multidimensional state monitoring and intelligent test control from macroscopic to microscopic can be realized.

The present application relates to the field of ground settlement prediction, and provides a time effect analysis method for ground settlement induced by foundation pit excavation in soft clay area, comprising: determining the time required for foundation pit construction under all working conditions and the retaining wall side displacement curve; determining the soil parameters according to the Boltzmann viscoelastic foundation model; obtaining the viscous settlement of all working conditions by using the Boltzmann viscoelastic foundation model; setting t=0 and the boundary condition as the retaining wall side displacement curve of all working conditions to obtain the elastic settlement under different working conditions; setting the boundary condition as the retaining wall side displacement curve when the bottom plate strength is formed to obtain the viscous settlement of the soil outside the pit after the bottom plate strength is formed; and summing the elastic and viscous settlement to obtain the ground settlement of the to-be-solved arbitrary working condition. The present application overcomes the problem that the existing theoretical method cannot consider the time effect of the soil, thereby leading to the problem that the prediction of the ground settlement is not safe, and also considers the ground settlement after the bottom plate strength is formed without depending on the retaining wall side displacement, which is more engineering significant and has good popularization and application value.

This invention discloses a support structure and method for deep foundation pits in saturated soft clay areas without internal support. The support structure includes SWM piles, continuously arranged along the edge of the foundation pit. The steel sections inserted into the SWM piles are recyclable steel sections, and the tops of the steel sections extend beyond the tops of the SWM piles. A reinforced concrete cap beam is horizontally enclosed on the SWM piles and fixedly connected to the extension ends of each steel section to connect all the steel sections into a whole. Multiple prestressed jet grouting anchors are set along the edge of the foundation pit. Each prestressed jet grouting anchor has an interconnected free section and an anchoring section. The free section is used for fixed connection with the reinforced concrete cap beam, and the anchoring section extends downward in an inclined direction and is inserted into the soil outside the foundation pit. This invention overcomes the drawbacks of traditional foundation pit support technology by combining SWM piles, prestressed jet grouting anchors, and reinforced concrete cap beams.

This invention relates to the fields of water conservancy and hydropower construction and soil and water conservation, and discloses a ditch-type spoil heap, including a ditch, a spoil retaining dam, and an in-reservoir storage area. The spoil retaining dam is located downstream of the ditch, and the in-reservoir storage area includes a first storage area and a second storage area. The first storage area is located upstream of the spoil retaining dam and can be used for storing rocky spoil; the second storage area is located upstream of the first storage area and can be used for storing soil spoil. During spoil heaping, the upstream slope of the spoil retaining dam forms the first storage area for storing rocky spoil, and the upstream side of the first storage area forms the second storage area for storing soft clay spoil. This achieves large-capacity storage of soft clay, improves the space utilization rate of the spoil heap and the capacity for disposing of engineering spoil. By adopting a classified and zoned storage method, the risk of siltation and water environment deterioration downstream of the second storage area is reduced, thus controlling soil erosion at its source. This invention also provides a spoil heaping method.

The application relates to the technical field of clay bricks, and discloses a dense clay brick and a preparation method thereof. The dense clay brick comprises 100 parts by weight of soft clay, 25-40 parts by weight of red mud, 20-32 parts by weight of fly ash, 4-8 parts by weight of a sulphurous acid paper pulp waste liquid binder and 0.1-0.6 parts by weight of modified carbon fibers. The surface of the modified carbon fibers contains a large number of double quaternary ammonium salt cation structures, can have electrostatic interaction with anions on the surface of the clay, enhances the interfacial bonding performance between the carbon fibers and the clay, makes the inside of the clay brick more compact, improves the bulk density and compactness of the clay brick, is beneficial to reducing the water absorption rate and improving the water resistance and waterproof performance. Moreover, the carbon fibers have large strength, high modulus and strong compression resistance, the interfacial bonding performance between the modified carbon fibers and the clay is better, and the compression strength and the bending strength of the clay brick are improved.

The present application relates to pile foundation detection technical field, specifically to a kind of pile foundation detection equipment, including conical ring, still including detection ring, rotating ring, intelligent sensor, locking assembly, pressure sensor, control module and fixed ring, driving mechanism is installed in the detection ring inside.The present application is judged limiting state by pressure sensor and control module after locking assembly is kept concentric limit after opening and pile foundation, then remove driving mechanism restriction, and according to the mode that the probe end of intelligent sensor is tightly attached to the outer periphery of pile foundation by the way that the corresponding number of turns is rotated to corresponding direction by driving mechanism according to pressure sensor feedback value, solve the problem that when the mud soft clay layer area in the southeast coastal area and inland lake sediment plain etc. of our country is detected, the mud containing clay particles seriously interfere with ultrasonic wave when using acoustic transmission method to detect pile foundation, affect pile foundation detection precision and detection efficiency.

The reciprocating rotary bidirectional drill bit suitable for soft mudstone layer drilling of the application uniformly sets three wing groove on the drill bit body, and designs the cutting wing as a crown structure, which forms a bidirectional drill bit with both ends being tapered when combined together, so as to ensure the stability and accuracy of the guidance in the drilling process and prevent the drill bit from deviating from the preset drilling track. The cutting teeth on the cutting wing can effectively cut the rock layer when the drill bit is pulled out in the reverse direction, thereby reducing the risk of drill bit burying caused by soft rock layer hole collapse. Meanwhile, the waist hole design is adopted for the drainage groove, which has the advantages of large water discharge, small water pressure shot to the hole wall, large flushing area and the like, so that the powder discharge is more smooth, and the risk of drill bit sticking is reduced.

The invention discloses a suction pile reinforcing device and a reinforcing method thereof. The suction pile reinforcing device comprises a suction pile of which the bottom is in an open state and the top is provided with a sealing cover, a plurality of groups of slurry spraying assemblies which are distributed in the suction pile and on the periphery of the suction pile in an annular array manner and can spray slurry in multiple directions, and a protective cylinder which is fixedly connected with the suction pile and is used for protecting the slurry spraying assemblies, the slurry supply assembly is communicated with the slurry spraying assembly and used for providing slurry, and the lifting assembly is installed at the top of the slurry spraying assembly and used for lifting the slurry spraying assembly. The guniting assemblies in the suction pile and on the periphery of the suction pile are symmetrically arranged, and the protection barrel is of a C-shaped tubular structure with an opening in one side. The slurry spraying assemblies are arranged inside and on the periphery of the suction pile at the same time, the slurry spraying assemblies spray slurry at a high speed to continuously cut soft clay and move upwards at the same time, uniform slurry spraying is achieved, the overall bearing capacity can be improved, the problem that the suction pile cannot sink in place can be solved through the internal slurry spraying assemblies, and the overall bearing capacity is further improved.

The invention belongs to the technical field of basic engineering data processing, and discloses a soft clay compression index rapid prediction method and system based on an equivalent concept, a terminal and a storage medium, and the method comprises the steps: obtaining model parameters of any soft clay based on an indoor compression test method, and determining a soft clay equivalent compression model according to the model parameters; acquiring basic physical characteristic parameters of the soft clay to be detected; substituting the basic physical characteristic parameters into the equivalent compression model of the soft clay, and solving to obtain a compression index of the to-be-tested soft clay; and outputting the compression index of the soft clay to be detected. According to the method, reasonable prediction of the compression characteristics of different types of soft clay under the conditions of large-range initial moisture content and stress level can be realized only by one conventional compression test, the prediction cost of the compression characteristics of the soft clay is remarkably reduced, and the prediction precision of the compression characteristics of the soft clay is improved.

The invention discloses a soft clay stirring device, and belongs to the technical field of soft clay stirring, the soft clay stirring device comprises a stirring barrel, a feeding bin is fixedly arranged on the top of the stirring barrel, a first motor is fixedly arranged on one side of the feeding bin on the top of the stirring barrel, and a material shaking mechanism is arranged in the feeding bin; a first motor is fixedly arranged on one side of the stirring barrel and is in transmission connection with the material shaking mechanism, a second motor is fixedly arranged on one side of the stirring barrel, a stirring mechanism is rotationally arranged in the stirring barrel and is in transmission connection with the second motor, and a discharging bin is fixedly arranged at the bottom of the stirring barrel; through optimal design of a feeding mechanism, a stirring mechanism, a sealing mechanism, a discharging mechanism and the like and in combination with precise regulation and control of an intelligent control system, the problems that when a traditional stirring device treats soft clay, stirring is insufficient, blocking is prone to occurring, efficiency is low, and operation is tedious are effectively solved, and the quality, efficiency and intelligent level of soft clay stirring operation are remarkably improved.

This application discloses a method, apparatus, equipment, and storage medium for correcting the undrained shear strength of soft clay obtained from a self-drilling pressuremeter test. The method includes collecting undrained shear strength and pore pressure dissipation data of soft clay at multiple test points obtained through self-drilling pressuremeter tests, and undrained shear strength of soft clay at multiple test points obtained through vane tests. For the current test point, the degree to which the undrained shear strength of the soft clay at the current test point is underestimated is determined, and the consolidation state parameters of the current test point are determined. Based on the correspondence between the degree of underestimation of the undrained shear strength of the soft clay and the consolidation state parameters, a correction coefficient for the undrained shear strength of the soft clay at the target test point is determined. This correction coefficient is used to correct the undrained shear strength of the soft clay at the target test point obtained through the self-drilling pressuremeter test. This method can improve the accuracy of the undrained shear strength of soft clay obtained from self-drilling pressuremeter tests.

The application discloses a kind of calculation methods for soft soil strength growth of preloading precompression foundation treatment, belong to the technical field of foundation treatment, the method of the present application innovatively uses the change of moisture content before and after preloading precompression drainage to obtain the growth of soil strength, without considering the consolidation state of soil, solve the limitation problem that current industry standard is only applicable to normal consolidation saturated soft clay for the strength growth calculation method of foundation soil under preloading, and is not applicable to overconsolidated soil and underconsolidated soil strength growth calculation;Solve the defect that current specification method only considers the strength growth caused by soil drainage consolidation under the action of compressive stress, but cannot consider the strength growth caused by shrinkage, can more accurately evaluate the treatment effect of preloading precompression method;Avoid the defect that current specification method can only consider the underestimated strength growth generated by one-dimensional consolidation of foundation and the cumbersome work of consolidation degree calculation, and is worth popularization and application.

This invention relates to the field of biomass cement technology and discloses a method for solidifying soft clay using activated magnesium oxide microbial slurry in synergistic CO2 co-solidification. The method includes: mixing a bacterial solution with urea to obtain a pre-hydrolyzed mixture; the bacterial solution containing urease-producing microorganisms; mixing and stirring the pre-hydrolyzed mixture, activated magnesium oxide, and soft clay sediment, while simultaneously introducing carbon dioxide gas during the mixing and stirring process; and curing after stirring is completed. This invention effectively overcomes the limitations of single biological carbonization or single gas carbonization by introducing a dual carbonization mechanism of urea pre-hydrolysis and short-term CO2 gas carbonization, synergistically improving reaction efficiency and ultimately enhancing the solidification effect of soft clay sediments.

The invention discloses a solid waste low-carbon flow-state solidified soil dry-mixed curing agent as well as a preparation method and application thereof, relates to a building material belonging to the field of solid waste recycling and geotechnical engineering materials, and aims to provide a solid waste low-carbon flow-state solidified soil dry-mixed curing agent which meets engineering requirements of fertilizer groove backfilling, cavity filling and the like, really realizes treatment of waste with waste, realizes resource utilization of low-carbon zero cement, and has a good application prospect. The curing agent has remarkable environmental benefits and engineering applicability. The solid waste low-carbon flow-state solidified soil dry mixing type curing agent is prepared from the following components in parts by weight: 30 to 45 parts of modified converter steel slag powder, 25 to 35 parts of activated municipal waste incineration bottom ash and 4 to 8 parts of acidified bentonite. The preparation method of the curing agent comprises the following steps: respectively preparing the three solid waste-based functional components, weighing according to the ratio, uniformly mixing with the solid dispersing agent in a closed mixer, bagging, sealing, and storing in a damp-proof manner. During construction, the curing agent is mixed with soft clay according to the mass ratio of 20%-35% of the dry weight of the on-site soft clay to form the flow-state solidified soil with the self-leveling performance, and the unconfined compressive strength within 28 days reaches 0.4-0.8 Mpa.

The present invention discloses an electroosmosis grouting device and an electroosmosis-biocementation synergistic reinforcement method for soft clay. The electroosmosis grouting device includes a soil model box, an electroosmosis device and a grouting device. The electroosmosis device includes a power supply, a first electrode and a second electrode arranged around the first electrode. Soft clay is contained between the first electrode and the second electrode. The first electrode is hollow inside to form a first channel. The inner side wall of the soil model box is a porous side wall, and a second channel is formed between the double-layer side walls. Both electrodes are porous electrodes. The grouting device includes a first circulation grouting device and a second circulation grouting device. The present invention first performs electroosmosis drainage through the electroosmosis device, and then, under the start-up and regulation of the electroosmosis device, injects biological slurry and cementing liquid into the soft clay in opposite directions through the first circulation grouting device and the second circulation grouting device respectively to synergistically reinforce the soft clay. The present invention improves the grouting efficiency and greatly increases the strength and bearing capacity of the reinforced soft clay.

The embodiment of the invention provides a suction type caisson foundation cycle bearing analysis method, system and equipment and a medium. The method comprises the following steps: establishing a cyclic creep element model; the cyclic creep element model is used for describing the accumulated plastic strain of saturated soft clay; introducing dynamic deflection stress and a softening coefficient into the cyclic creep element model to obtain an equivalent cyclic creep model; the equivalent cyclic creep model is popularized to be three-dimensional, and a finite element model of the cyclic uplift bearing capacity of the suction caisson foundation under the cyclic load effect is established; and the finite element model is used for analyzing and calculating the cyclic uplift bearing capacity of the suction caisson foundation. According to the embodiment of the invention, the equivalent cyclic creep model of the soft clay is established by considering the static deflection stress and dynamic deflection stress factors and combining the creep element model, the equivalent cyclic creep model is popularized to three dimensions, a finite element subprogram is developed, and a finite element analysis method for the cyclic uplift bearing capacity of the suction caisson foundation under the cyclic load effect is established.

The invention provides a method and a system for extracting and enriching micro-plastics in ooze toys, and the method comprises the following steps: weighing an ooze toy sample, selecting a corresponding solvent to dissolve the sample according to the solubility of the ooze toys, water-soluble ultrapure water for the ooze toys, fat-soluble isopropanol for the ooze toys, water-soluble ultrapure water for the ooze toys, water-soluble isopropanol for the ooze toys, water-soluble ultrapure water for the ooze toys and water-soluble isopropanol for the ooze toys; then carrying out ultrasonic treatment until the sample is completely dissolved; carrying out suction filtration on the dissolved sample by using a filter membrane, washing a container containing the sample twice by using a corresponding dissolving solvent, transferring a washing solution into a suction filtration device, and carrying out combined suction filtration; washing the filter membrane with corresponding washing solvents in sequence, and taking out and drying the filter membrane after suction filtration is completed; putting the back surface of the dried filter membrane into a container, adding acetone, covering the container, performing ultrasonic treatment, taking out the filter membrane, and replacing the filter membrane with a clean glass beaker; and combining the extracted solvents, transferring the combined solvents into a centrifugal tube, centrifuging, sucking an upper-layer solution by using a glass suction tube under the condition of not disturbing a lower layer, and volatilizing the residual solvents to complete the extraction and enrichment of the micro-plastics in the soft mud toys. The method is high in reliability, and the micro-plastic content of the commercially available soft mud toys can be accurately detected.

The invention discloses a tubular pile post-construction aging bearing capacity prediction method based on pore pressure static sounding and static pressure final pressure. The method comprises the following steps: firstly, dividing strata by using piezocone penetration and acquiring consolidation parameters; secondly, a pile periphery pore pressure dissipation-consolidation model and a bearing capacity aging model are established; estimating long-term side friction resistance and end resistance based on penetration data, and determining initial resistance by combining actually measured static pressure and final pressure; and finally, calculating the post-construction aging bearing capacity of the tubular pile at any moment. The method is suitable for the soft clay stratum, and accurate prediction of bearing capacity evolution along with time is achieved.

The application provides a sand layer heavy metal contaminated soil in-situ electric dynamic remediation device and a remediation method thereof, and relates to the technical field of environmental protection engineering construction. The sand layer heavy metal contaminated soil in-situ electric dynamic remediation device comprises two electrode chambers, at least two liquid control chambers are installed on each electrode chamber, at least two remediation pipes are fixedly installed on the bottom of the at least two liquid control chambers in correspondence, soft clay is filled into the at least two remediation pipes, and the at least two remediation pipes are communicated with the liquid control chambers and the electrode chambers through the soft clay. Based on the low permeability of the contaminated soft clay, the remediation pipe is used, the pipe opening avoids the sand layer, the electrolyte above the ground and the electrode are used, and the contaminated soil is remediated by applying a direct current electric field.

The present application relates to the technical field of slope greening irrigation, and particularly provides a slope irrigation system and a green slope, the slope irrigation system adopts a reinforced drainage grid, can form reinforcement to the slope, especially for soft clay and other soil, sets a water collecting part and a drainage grid at different heights, cooperates with the first pipeline and the second pipeline between layers, is beneficial to irrigation and water quantity coordination at different heights, according to different water content, can control the water collecting part located at the high part of the slope to drain to the water collecting part below through the first pipeline, to realize cascade control of drainage, also can make the water collecting part irrigate through the second pipeline, is beneficial to irrigation of slope planting soil and farmland irrigation, also can change the permeability of the filter layer, to improve the drainage of the internal water body of the expansive soil, especially the poor drainage performance, ensure the stability of the slope, has the characteristics of strong adaptability, green environmental protection and high intelligence.

The invention belongs to the technical field of refractory materials, and relates to a comprehensive anti-carbon deposition method based on glass phase regulation and composite phase synergistic strengthening, which comprises the following steps: introducing a B2O3 source as a glass phase and andalusite as a synergistic strengthening phase in the preparation process of a refractory material, and mixing the B2O3 source and the andalusite to uniformly distribute a boron source and a composite phase in a green body; in the sintering and high-temperature service process, multiphase components in the system are subjected to a synergistic reaction, and a composite anti-carbon deposition system with chemical passivation and structure sealing functions is formed; the specific method comprises the following steps: mixing a refractory raw material, soft clay, a binding agent, a B2O3 source and andalusite, and reacting the B2O3 source with Fe2O3 and SiO2 components in a sintering stage to form a low-melting-point B2O3-Fe2O3-SiO2 eutectic glass phase; and andalusite is used as a second phase strengthening component. According to the invention, the systematic anti-carbon deposition strengthening of the alumina-based refractory material in the CO atmosphere from the chemical reaction level to the microstructure level is realized, and the anti-carbon deposition performance and the service stability of the material are obviously improved.

The application discloses a kind of soil solidifying agent and preparation method thereof, belong to building material technical field.The soil solidifying agent includes the following mass parts of raw materials: 80~100 portions HAS soil solidifying agent base material, 1~5 portions nano silicon dioxide, 0.5~3 portions triethanolamine, 0.1~1 portions anionic polyacrylamide and 0.5~2 portions sodium lignosulfonate.The application also discloses the preparation method of the soil solidifying agent, and the obtained product is suitable for the solidification treatment of various soil types such as soft clay, silt soil, tailings, etc.The formula of the application utilizes the high activity filling effect of nano silicon dioxide, the early hydration acceleration effect of triethanolamine, the space network bridging capacity of polyacrylamide and the dispersion and retarding function of sodium lignosulfonate, and each component synergistically acts, improves the solidification efficiency of the solidifying agent on high water content soil, and the early strength, water stability and freeze-thaw resistance are improved.

The invention provides an airport flying area safety diagnosis method based on a shear wave velocity change rate, and the method comprises the steps: collecting an earth surface micro-motion signal of a monitoring area of an airport flying area, and carrying out the inversion of the shear wave velocity profiles of a soil layer pre-disturbance state and a soil layer post-disturbance state; sequentially converting the shear wave velocity profile into a rebound modulus of each layer of soil body, a comprehensive rebound modulus and a soft clay soil matrix reaction modulus, and performing back calculation according to a change rate threshold value of the soft clay soil matrix reaction modulus to obtain a shear wave velocity change rate threshold value corresponding to each layer of soil body; and comparing the shear wave velocity profiles before and after disturbance, calculating the change rate of the shear wave velocity of each layer of soil body, and when the change rate of the shear wave velocity of a certain layer of soil body exceeds a corresponding threshold value, determining that the certain layer of soil body is a dangerous section which affects the safety of the pavement structure. The method is implemented based on a surface micro-motion signal, and layered diagnosis of the airport flight area soil body safety state can be realized.

The invention relates to the field of supply and demand interaction of a power system, and discloses a method for analyzing deformation of a subway tunnel by foundation pit construction in a saturated soft clay area, which comprises the following steps of: a, acquiring geological information of an area to be analyzed; b, establishing a three-dimensional numerical model based on the geological information, and setting a soil constitutive relation and boundary conditions; c, simulating and calculating a displacement field and a stress field through the three-dimensional numerical model; and step d, according to the displacement field and the stress field, analyzing and determining a deformation control measure for the existing subway tunnel. According to the method, a three-dimensional numerical model containing soil layering, a tunnel structure and a supporting system is established through geological information, deviation caused by excessive simplification of the model in a traditional analysis method is avoided, the model is calibrated through field monitoring data, the displacement field and the stress field obtained through calculation can more accurately reflect engineering practice, and the engineering practice is more accurate. And the accuracy of predicting the deformation of the existing subway tunnel is obviously improved.

The utility model relates to a remodeling saturated soft clay cutting ring sample preparation device which comprises a pressurizing module and a remodeling assembly, the pressurizing module comprises a load controller, a lifting platform, a pressurizing cover and a counter-force frame; the remolding assembly comprises an extension cylinder, a consolidation cylinder and a base; the consolidation cylinder is composed of two semicircular cylinder structures, and an interlayer is arranged in the cylinder wall of the consolidation cylinder; one ends of the semicircular cylinders are connected through hinges, and the other ends are connected together through bolts; and the fixed cylinder bottom is locked with the base. The beneficial effects of the utility model are that the numerical control pressurization system is adopted to replace the traditional weight adding to provide pressure, so that the manual labor is reduced; the fixing cylinder and the base are fixedly connected through the groove and the fixing protruding block. The connection mode is simple and convenient to operate; the consolidation cylinder is of a two-section semicircular cylinder structure, the semicircular cylinders are screwed and connected through bolts, operation is easy, it is guaranteed that a soil sample cannot overflow from the joint of the consolidation cylinder and the extension cylinder during extrusion, disturbance to a soil body is reduced, and the accuracy of follow-up tests is improved.

The present invention relates to a semi-siliceous high-temperature foamed insulating refractory material and a preparation method thereof, and relates to the technical field of insulating refractory materials. The present invention mainly comprises the following steps: 26-54wt% of a low-aluminum-aluminum siliceous natural raw material, 40-65.5wt% of silica, 0.5-4wt% of kyanite, 0.2-0.5wt% of a high-temperature foaming agent, and 4wt% of a soft clay binder are mixed according to mass percentage to obtain a mixed raw material; the mixed raw material is then wet-ground into 325 mesh, placed in a drying tower for dehydration, granulated, and formed under a pressure of 100-120 MPa to obtain a green body; and finally, the green body is placed in a high-temperature furnace at 1500-1580°C for 1-2 hours and calcined, and after cooling and taking out of the furnace, the semi-siliceous high-temperature foamed insulating refractory material is obtained. The semi-siliceous high-temperature foamed insulating refractory material of the present invention has silicon dioxide as its main chemical component, is foamed in situ by high-temperature calcination, and does not introduce low-melting-point flux. The prepared product has low thermal conductivity, good mechanical properties and high operating temperature.

This invention discloses a method for testing the strength properties of cement-stabilized soil based on randomly distributed weak clay aggregates. The method includes the selection of weak granular materials, preparation of fluidized solidified soil, determination of experimental schemes, and data analysis methods. Based on data from real-world and numerical simulation experiments of unconfined compressive strength of fluidized solidified soil specimens with different weak particle parameters, the functional relationship between the age-cured strength of the specimens and the weak particle parameters is obtained using Matlab data analysis software and a multiple regression linear method. This invention provides a method for preparing age-cured specimens of cement-stabilized soil with randomly distributed weak particles and a method for forming a random sphere model in numerical experiments, providing an experimental method for studying the influence of weak particles in in-situ cement-stabilized soil specimens on the macroscopic mechanical properties of the solidified soil.

This invention belongs to the field of intelligent speed ratio control technology, specifically relating to an intelligent speed ratio control method for seabed probe penetration, comprising the following steps: real-time acquisition of multi-dimensional detection data during the probe's descent and penetration; calculation of the real-time speed ratio based on the multi-dimensional detection data, and real-time identification of four types of strata—soft clay, hard clay, loose sand, and dense sand—in conjunction with formation response parameters; dynamic adjustment of PID parameters through a fuzzy PID controller based on the deviation between the real-time speed ratio and the target speed ratio and its rate of change, outputting the penetration rate adjustment amount, and real-time correction of the target speed ratio according to pore water pressure; closed-loop execution of rate adjustment, cyclically implementing intelligent decision-making until penetration is completed. This invention effectively improves the continuity and reliability of exploration operations under complex deep-sea geological conditions, can adaptively adjust penetration parameters, and significantly shortens the single-hole penetration operation time while ensuring data quality and equipment safety, thereby improving the overall efficiency of offshore exploration operations.