30 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 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 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 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 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.

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.

The invention discloses a construction method of a soft clay anisotropy de-structured elastic-plastic model, and relates to the technical field of geotechnical engineering. The method comprises the following steps: taking an anisotropic elastic-plastic constitutive model S-CLAY1 as a first soft clay anisotropic de-structured elastic-plastic model; constructing a calculation formula of effective stress increment and introducing the first soft clay anisotropy de-structured elastic-plastic model to obtain a second soft clay anisotropy de-structured elastic-plastic model; introducing a size hardening rule into the second soft clay anisotropy de-structured elastic-plastic model to obtain a third soft clay anisotropy de-structured elastic-plastic model; determining conventional parameters and partial softening parameters; and determining the soft clay anisotropy de-structured elastic-plastic model based on the plastic body strain conventional parameter, the plastic body strain partial softening parameter and the plastic body strain third soft clay anisotropy de-structured elastic-plastic model. According to the method, bonding does not need to be considered when soft clay is modeled, so that the modeling difficulty is reduced.

The application provides a model test device for simulating the environment load and scour effect of a suction bucket, comprising a layered shear box, a plurality of scour pit simulation devices are arranged around the suction bucket in the layered shear box, each scour pit simulation device comprises a support arranged in the layered shear box, a telescopic arm is arranged on each support, the telescopic arm is connected with a cutting surface plate, and the cutting surface plate is arc-shaped and fan-shaped; when each cutting surface plate moves to a position in contact with the outer wall of the suction bucket, the plurality of cutting surface plates are connected with each other to form a ring around the suction bucket, the inner edge of the ring forms a complete circle in contact with the outer wall of the suction bucket, and the outer edge of the ring is higher than the inner edge; at this time, the outer edge is above the saturated soft clay in the water body. The application can simulate the working conditions of the suction bucket foundation under the action of long-term wind and wave load and scour effect, earthquake, and coupling of earthquake and wind and wave load. The application does not arrange a counterweight structure, and the stability and availability of the centrifuge during continuous and uninterrupted rotation are high, so that the test result is accurate.

The invention belongs to the technical field of civil engineering, and provides an in-situ vane shear apparatus which is used for exploration of soil layer distribution, acquisition of saturated soft clay strength parameters and sensitivity, determination of more soil property parameters and high test precision. According to the technical scheme, a balancing table is fixed to the ground, an outer drill rod is vertically arranged in the center of the balancing table, a hydraulic jack and torsion equipment are installed on the balancing table, and an upper rod body of the outer drill rod is fixedly connected with the hydraulic jack through an outer drill rod clamp; the lower end of the outer drill rod is fixedly connected with a pressure gauge module, a torsion sensor and a cross-shaped containing cavity plate of the inner cross-shaped plate head in sequence, an arrow-shaped cross-shaped cone plate is installed in the cross-shaped containing cavity plate in a sliding mode, longitudinal holes are formed in the inner centers of the outer drill rod, the pressure gauge module and the torsion sensor, and an inner probe rod is vertically installed in the longitudinal holes in a sliding mode; the lower end of the inner feeler lever penetrates through the pressure gauge module and the torsion sensor and is fixedly connected with the arrow-shaped cross cone plate, and torsion equipment extends into the outer drill rod to be connected with the inner feeler lever.

The application discloses a soft clay electrochemical reinforcement device and method, the device comprising a power supply, an anode, a cathode, and an intermediate grouting pipe; a cation exchange membrane is arranged in the area close to the cathode of the soil body to be reinforced, the cation exchange membrane only allows the migration of cations from the inside of the soil body to the direction of the cathode, and physically blocks the reverse diffusion of anions generated by the cathode electrolysis reaction to the direction of the soil body; the cation exchange membrane is wrapped on the outer surface of the cathode, or is arranged in the soil body around the cathode as an independent separation layer, forming an ion filtering interface completely surrounding the cathode. The method sets a selectively permeable cation exchange membrane at the interface between the cathode and the soil body, and combines the step grouting process of anode grouting first and then intermediate grouting pipe grouting, thereby significantly improving the unit energy consumption drainage capacity under the same voltage, and increasing the soil body settlement in the cathode area by nearly 4 times, thus solving the engineering problem of the traditional electro-osmosis "hard anode and soft cathode".

The application discloses fire clay for improving the bonding strength of refractory brick masonry and a preparation method thereof. The fire clay comprises 48-52% of clay raw material powder, 18-22% of soft clay, 8-12% of high alumina clinker powder, 10-12% of a binder, 1-2% of an additive and the balance of water in percentage by mass. The preparation method of the fire clay comprises the following steps: S1, batching, S2, mixing materials, and S3, mixing. Compared with the binder applied in the preparation process of the fire clay in the prior art, the binder has higher bonding strength and lower requirement for temperature conditions, and still has higher bonding strength at normal temperature, so that the binder can be more widely used in the refractory brick masonry process.

The invention discloses a soft clay sample quality evaluation method and system based on disturbance space partitioning. The method comprises the following steps: S1, dividing a soft clay layer in a sampling tube into a central region, an edge region and an end region; s2, taking the measured main peak aperture of the blocky undisturbed sample as a reference value, respectively sampling from a central region, an edge region and an end region, carrying out mercury injection test on the sample in each region to obtain an aperture distribution PSD curve, and extracting PSD parameters; s3, adopting a disturbance index SDI formula to quantify disturbance degrees of different areas; s4, mapping the SDI distribution of each region to a normalized coordinate system, and generating a two-dimensional disturbance distribution diagram of the soft clay sample; and S5, calculating a comprehensive disturbance index of the soft clay sample, and dividing the soft clay sample into different disturbance grades according to a relationship between the comprehensive disturbance index and a preset threshold value. The method can effectively identify the disturbance difference which is difficult to find by the traditional overall index, and has a high application value.

The invention belongs to the technical field of coal gangue filling bodies, and provides a gel material for a coal gangue filling body and a preparation method of the gel material. The gel material for the coal gangue filling body comprises clay powder, an active agent, aluminum sulfate and sodium carboxymethyl cellulose in specific parts by mass. The soft clay is subjected to microwave heat treatment and then mixed with the active agent, the aluminum sulfate and the sodium carboxymethyl cellulose to obtain the gel material, the raw materials are non-toxic and pollution-free and are weakly acidic or neutral, the hydration reaction can be completed according to the ion exchange behavior of the raw materials, the pH value of coal gangue slurry does not need to be increased, and the preparation process is simple. The final pH value of the coal gangue filling body is ensured to meet the requirement of underground water quality; (-Si-O-Al-O-) n polymer skeleton gel, hydrated calcium silicate gel, hydrated calcium aluminate gel and hydrated calcium aluminosilicate gel are continuously generated in the hardening process of the cementing material, heavy metal ions in the coal gangue are adsorbed and fixedly sealed in situ, and the long-term strength meets the filling requirement of the coal gangue.

Disclosed in the invention are a deep foundation pit supporting system in a soft clay / silt layer environment, and a construction method, comprising the following steps: construction preparation; construction scheme design and feasibility evaluation: formulating a construction scheme, and evaluating whether the stability of the deep foundation pit supporting system meets requirements; support and reinforcement design and construction for soft clay / silt: designing a structure for supporting and reinforcing soft clay / silt, and constructing a steel sheet pile retaining wall, an out-pit cement mixed pile retaining wall, and an in-pit cement mixed pile retaining wall; earth excavation and internal support construction in a foundation pit: carrying out earth excavation and using internal steel pipe supports for supporting; and in-pit construction and supporting system conversion: pouring bottom-sealing concrete at the bottom of the deep foundation pit, pouring a bearing platform on the bottom-sealing concrete, and removing the internal steel pipe supports during the pouring process. The method of the present invention can effectively enhance the stiffness of the deep foundation pit supporting system, prevent groundwater infiltration, and increase the weight of a foundation pit bottom-sealing member so as to prevent heave and water inrush of a soft clay / silt body at the bottom of the foundation pit.