171 results about "Soil mechanics" patented technology

The invention relates to the technical field of underground engineering and geotechnical mechanics, and provides a marine facies soft soil tunnel construction disturbance induced surrounding rock energy dissipation grading evaluation method which comprises the following steps: step 1, establishing a marine facies soft soil energy dissipation constitutive model based on thermodynamics; 2, determining mechanical parameters of the constitutive model; 3, establishing a tunnel construction mechanical model, embedding the constitutive model in the step 1 and the mechanical parameters in the step 2 into the tunnel construction mechanical model, and outputting an energy subitem output quantity in real time; step 4, establishing a damage unit identification system; 5, arranging a monitoring system to obtain monitoring data and feeding the monitoring data back to the numerical model for verification; and step 6, performing graded early warning according to the closeness degree of the structural unit to the instability failure energy threshold value. According to the scheme, a surrounding rock damage grading system is constructed through an energetic perspective, rapid risk identification is realized in combination with multi-source monitoring data, and a new theoretical and engineering means is provided for safe construction of the marine soft soil tunnel.

The invention relates to the technical field of geotechnical mechanics and engineering, and particularly discloses a soft soil foundation settlement monitoring method and system based on multi-field multi-source information, and the method comprises the steps: collecting multi-source data of a target soft soil area; performing constitutive parameter inversion, data standardization and discrete Fourier transform frequency domain conversion on the data to obtain a standardized frequency domain multi-field multi-source data set; based on the data set, a soft soil constitutive parameter library and a soil mechanics physical equation, constructing an FD-PINN frequency domain physical information neural network, embedding the physical equation as a prior constraint, and training the model by adopting an alternating optimization strategy; inputting the real-time frequency domain data flow into the model, and outputting the current settlement amount, the settlement rate and the multi-physical field frequency domain distribution; and in combination with a pre-established large scale model test result, through IDFT inverse transformation, a time-space domain settlement field is reconstructed, multi-stage early warning is triggered, a targeted reinforcement scheme is recommended, the soft soil foundation settlement monitoring precision and the engineering practicability are remarkably improved, and the method is suitable for construction, operation and maintenance of infrastructures such as high-speed rails and highways.

The invention discloses a pumped storage power station building foundation dangerous point management and control system based on BIM, and the system comprises a data layer which enables linear engineering monitoring data to be organized into a high-order tensor of pile number * time * sensor type * spatial position through four-dimensional tensor modeling, and carries out the Tucker decomposition, strain rate abrupt change points are dynamically recognized in the compression process by combining sliding window anomaly detection, original data are directly stored, and then a hierarchical storage strategy is implemented on non-abrupt change data through a data value evaluation model driven by deep reinforcement learning; the model layer is used for fusing a physical information neural network, embedding a rock-soil mechanics constitutive equation into an LSTM network to construct a mixed loss function, pre-training a general geologic model through transfer learning, and then carrying out few-sample fine tuning in combination with project data; and the application layer is used for dynamically generating a hazard source list through a BIM model and triggering instant early warning based on the compressed and reconstructed data of the data layer and the output of the model layer, and simulating a disaster situation development path in combination with a digital twinborn technology.

The invention relates to the technical field of underground engineering and geotechnical mechanics, and provides an ABAQUS secondary development-based underground engineering blasting simulation method, which comprises the following steps of: 1, establishing a geometric model and dividing a calculation region into an Euler domain and a Lagrange domain; step 2, calling and realizing a JH-2 constitutive model through a UMAT user subprogram interface of the ABAQUS; step 3, modeling in an Euler domain by adopting a JWL state equation; step 4, applying a coupling Euler-Lagrange method; 5, setting boundary conditions and blasting loading parameters of the geometric model; and step 6, performing transient dynamics calculation, and outputting a result for analyzing a blasting effect. According to the scheme, a high-precision numerical test platform can be provided for underground engineering blasting design and safety control, engineering risks are reduced, blasting parameter configuration is optimized, and remarkable engineering application value and popularization significance are achieved.

The invention relates to the technical field of underground engineering construction, in particular to a subway contact channel freezing method parameter optimization method and system. Through multi-source data fusion and real-time perception, based on a heat transfer theory and soil mechanics coupling model, a three-dimensional stratum stable field distribution diagram is constructed through real-time state parameters, and the stability of the frozen wall is visually presented, so that the limitation that a traditional empirical formula cannot reflect complex geological response is solved; defect features such as non-intersection circles and insufficient thickness are extracted through a multi-scale algorithm, automatic identification and positioning of defects are achieved, subjectivity and hysteresis of manual judgment are overcome, process parameters are optimized in combination with finite element simulation, an optimal parameter set is obtained, and therefore the problem that static parameters are difficult to cope with geological mutation is solved. And finally, a closed-loop optimization mode is formed by comparing the quality evaluation value with a preset threshold value, the'one-time optimization 'mode of a traditional method is broken through, it is ensured that parameters are matched with dynamic geology, and the frozen wall quality and the stratum reinforcement effect are guaranteed.

The invention discloses a multifunctional geotechnical mechanical testing system for controlling temperature, humidity and salinity in an extreme environment, and relates to the technical field of ocean geotechnical engineering and geotechnical engineering. The system integrates a high-precision temperature and humidity and salinity control system, can accurately simulate the influence of complex environments such as extreme temperature and humidity, salt spray corrosion and the like on the mechanical properties of geotechnical materials, supports a direct shear test, a pull-out test, a soil body single-particle crushing test and a geosynthetic material stretching and puncturing test, can distinguish static, dynamic and long-term creep test modes, and can be used for testing the mechanical properties of the geotechnical materials. Comprising creep mechanical property testing under cyclic direct shear and continuous load. A visual monitoring assembly is additionally arranged, so that the microscopic deformation and damage process of the sample can be recorded in real time. Through multifunctional integration, temperature, humidity and salinity joint control, visual monitoring and dynamic and static coupling test devices, the technical bottlenecks of single function, environment simulation limitation and microcosmic observation deficiency of traditional equipment are solved, and high engineering application value and popularization potential are achieved.

The invention provides a lunar lava tube rock wall mechanical parameter testing device and method based on a rebound principle, and relates to the technical field of lunar rock-soil mechanics detection.The device comprises an ejection module, a driving module, an energy storage locking module, a control module and an impact measuring module which are arranged in a protective shell; the ejection module comprises an ejection body of a hollow cylinder structure, the ejection body is arranged in the center of the interior of the protective shell, the upper end face of the ejection body is connected with a clamping pin, a pair of lug stoppers are arranged on the outer walls of the lower portions of the two sides of the ejection body, and the lug stoppers are reset through first springs. The lower end face of the elastic striking body is connected with the upper end of the extension spring, the lower end of the extension spring is connected with the upper end of the striking end support, and the lower end face of the striking end support is connected with the upper end face of the striking rod. The problems that a traditional Schmidt hammer is poor in adaptability in the lunar environment, low in automation degree, ineffective in parameter measurement basis and the like are solved.

The invention relates to the technical field of space exploration and lunar soil experiments, in particular to a melting centrifugal type mineral particle morphology remodeling device and a lunar soil glass ball preparation method. The device comprises a mineral protolith high-temperature melting system, a mineral melting slurry conveying system, a centrifugal mineral particle size control system and a mineral particle cooling and morphology remodeling system. The preparation method of the lunar soil glass ball comprises the following steps: adding basalt mineral powder and mineral melting additive powder into a melting centrifugal mineral particle morphology remodeling device to obtain simulated lunar soil glass balls with different particle sizes, and performing morphology transformation on the simulated lunar soil glass balls with different particle sizes by using an ion beam gun. And the lunar soil glass ball state of the impact melting history is reduced. According to the method, high-precision engineering mass production of components, morphology and mechanical properties of the lunar soil glass balls is realized through a fusion centrifugal forming and ion beam surface control composite process, and the problem of soil mechanical behavior deviation caused by morphology distortion of existing simulated lunar soil is solved.

The invention provides a mine geological disaster early warning method and system based on digital twinning and electronic equipment, and relates to the technical field of geological disaster monitoring and early warning. The method comprises the following steps: constructing a digital twinborn model corresponding to a target mine based on multi-dimensional geological data and rock physical and mechanical parameters; collecting multi-source heterogeneous monitoring data of the target mine in real time, and mapping the multi-source heterogeneous monitoring data to corresponding grid nodes of the digital twinborn body based on the spatial coordinate relationship so as to update state attributes of the digital twinborn model in real time; according to the rock mass physical and mechanical parameters of the grid nodes and the updated state attributes, a slope stability coefficient is calculated through a rock and soil mechanical model; calculating a displacement predicted value based on historical time sequence characteristics of the multi-source heterogeneous monitoring data by using a data driving model; and carrying out fusion calculation on the slope stability coefficient and the displacement prediction value to obtain a comprehensive early warning index, and when the comprehensive early warning index meets a preset geological disaster alarm condition, rendering a risk area in the digital twinborn body.

The invention discloses a multi-parameter shallow gas detection method which comprises the following steps: S1, self-adaptive sensing network layout and multi-parameter synchronous acquisition: monitoring nodes synchronously acquire underground electrical parameters, soil gas composition and concentration, soil mechanics and pore pressure parameters and an environmental noise background value; accessing a hydro-meteorological data stream of the target area in real time; s2, multi-source interference signal identification and data purification: obtaining a purified multi-parameter data sequence reflecting real geological anomalies; s3, water-gas-force coupling dynamic modeling and migration simulation: outputting a shallow gas migration risk thermodynamic diagram; s4, intelligent diagnosis based on transfer learning and causal discovery: performing time sequence analysis on the purified multi-parameter data sequence, and identifying a gas reservoir core area, a dominant migration channel and dominant control factors influencing gas aggregation and migration; and S5, dynamic risk assessment and graded early warning: quantitatively calculating the risk probability.

The invention discloses a pile sinking soil body response prediction regulation and control method based on a physical model, and relates to the technical field of geotechnical mechanics pile foundation engineering, and the method comprises the following steps: constructing an experimental model, arranging a sensor, and operating a loading device to enable the experimental model to sink a pile; according to the model pile sinking process, the soil body response is monitored in real time, and monitoring data are obtained; inverting the dynamic response of the soil body through the PINN inversion model, and coupling the DEM and the FEM to simulate and predict the response of the soil body; and risk control is carried out through a CEI early warning decision-making method. The device and the method are used for solving the problems of incomplete data acquisition, inaccurate simulation and lack of early warning in a traditional open tubular pile soil squeezing model test.

The invention discloses a parameter prediction method and device, electronic equipment and a storage medium. According to the method and the device, the essential rule of a salt cavern gas storage system is described on the basis of a physical driving model; meanwhile, systematic errors, caused by parameter simplification, ignoring of shaft dynamic heat exchange and other effects, of a pure mechanism model are accurately learned and compensated by means of a data driving model, and advantage complementation is achieved through fusion of the two; the technical problem that systematic deviation is generated between model output and actual operation data due to the fact that rock and soil mechanical parameters are simplified, a fixed friction coefficient is adopted or a shaft dynamic heat exchange effect is ignored in an existing pure mechanism model under complex geological conditions can be solved. The technical effects of improving the accuracy and reliability of thermodynamic parameter prediction of the salt-cavern gas storage system, adapting to complex geological conditions and further guaranteeing stable operation of the compressed air energy storage system are achieved.

The invention relates to the technical field of foundation settlement monitoring, and discloses a BIM-based foundation settlement dynamic monitoring system and a use method, and the BIM-based foundation settlement dynamic monitoring system comprises a BIM parametric modeling module, a dynamic monitoring module and a settlement compensation regulation and control module. The BIM parametric modeling module generates a three-dimensional model containing rock-soil mechanical parameters, underground water level data and soil layer distribution information, and receives real-time data to update a settlement state; the dynamic monitoring module collects foundation key node vertical displacement, bearing structure internal stress and edge horizontal inclination angle data and transmits the data to the BIM module and the settlement compensation regulation and control module. The settlement compensation regulation and control module comprises a compensation decision unit, an execution mechanism unit and a feedback control unit, and a'monitoring-decision-execution-feedback 'closed-loop control link is formed. According to the invention, the three modules are integrated to realize full-flow dynamic linkage of foundation settlement, so that the problems that a traditional geologic model is disjointed with monitoring data and settlement is difficult to compensate in real time are solved, and the construction precision and the structural stability are improved.

A multi-medium three-dimensional modeling and rock-soil mechanical response coupling method comprises the steps that a collapse risk assessment model is established according to time sequence evolution data of deformation accumulation, if the local deformation rate exceeds a preset threshold value, a high-risk area is judged, and if the deformation accumulation amount reaches a critical value, a potential collapse position is determined; constructing a spatial prediction model through the high-risk area and the potential collapse position information, and performing quantitative calculation on collapse probabilities of different areas by adopting a risk assessment algorithm to obtain a spatial distribution prediction result of karst collapse; and updating numerical model parameters by adopting spatio-temporal information output by the early warning mechanism, and optimizing and adjusting the prediction precision through a feedback correction mechanism to obtain a karst collapse prediction technical system adapted to complex geological conditions. According to the method, accurate prediction and early warning of the karst collapse are achieved in a data driving and model coupling mode, technical support is provided for prevention and treatment of the karst collapse under complex geological conditions, and the method has important practical value.

This invention relates to the field of geological disaster monitoring and distance sensor technology, specifically disclosing a real-time monitoring and early warning method for slope deformation based on interferometric radar images. The method includes: acquiring multi-time-series interferometric radar images and extracting high-precision surface deformation field sequences; constructing a physical information neural network model integrating the constitutive relations of rock and soil mechanics; using the deformation field as input to invert the internal stress, pore water pressure, and potential sliding surface of the slope in real time; determining the instability risk level based on preset thresholds and triggering a three-level early warning response mechanism to generate a visualized early warning report. This invention achieves highly timely and interpretable early warnings at the minute or even second level by deeply coupling millimeter-level deformation observation with physical constraints, thus improving the scientific rigor and reliability of slope disaster monitoring.

This invention discloses a method and system for inverting mechanical parameters and intelligently analyzing the stability of tunnel surrounding rock, relating to the field of intelligent construction technology for tunnels and underground engineering. The method includes: collecting tunnel monitoring and measurement data and constructing a displacement field observation matrix; constructing a physical information neural network embedded with the geotechnical mechanics control equations to invert the mechanical parameters and stress field of the surrounding rock; automatically calling the finite element kernel through a programming interface and calculating the safety factor of the surrounding rock using the strength reduction method; using evidence theory to fuse multi-source analysis results and output the stability level; and driving online model updates and support optimization through prediction-monitoring comparison verification. This invention achieves the integration of parameter inversion, automated numerical simulation, and closed-loop verification, improving the accuracy, efficiency, and intelligence level of surrounding rock stability analysis.

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 application belongs to the technical field of geotechnical mechanics, and particularly discloses a method and system for obtaining mechanical parameters of a rock mass joint unit. The method comprises the following steps: obtaining macro mechanical parameters of complete rock based on indoor rock basic mechanical test; dividing rock mass grades of engineering rock mass according to a rock mass quality classification standard to obtain equivalent rock mass mechanical parameters; deducing an elastic-plastic stiffness matrix of the joint unit according to Mohr-Coulomb criterion and associated flow rule; and calculating the mechanical parameters of the joint unit and verifying the rationality of the mechanical parameters of the joint unit according to the homogenization theory and the limit strain theory. The application processes the structural surface into a soft interlayer with a certain thickness based on the idea of the equivalent continuous model, divides the rock mass into elastic rock units and elastic-plastic joint units, comprehensively obtains the mechanical properties of the joint unit through analysis of the entire joint rock mass unit, and can meet the engineering calculation accuracy and facilitate direct application of indoor test data.

This invention discloses a method for joint monitoring of surface subsidence and pipeline deformation in coal goaf areas, relating to the fields of geotechnical mechanics and surveying engineering technology. The method includes: acquiring SAR time-series images of the coal goaf area; obtaining surface subsidence data of the coal goaf area based on the SAR time-series images by combining the S-InSAR method and the phase cumulative difference D-InSAR method; determining the pipeline length, inner and outer diameters, burial depth, and the extent and shape of the soil mass based on the SAR time-series images of the coal goaf area, and establishing a pipeline-soil numerical model of the coal goaf area; determining the subsidence value and horizontal movement value based on the coal goaf image data containing the relationship between surface subsidence and pipeline location; inputting the subsidence value and horizontal movement value into the pipeline-soil numerical model of the coal goaf area for numerical simulation to obtain pipeline deformation stress data; and determining the spatial coupling relationship between the surface subsidence data and the pipeline stress-deformation data by spatially superimposing the surface subsidence data and the pipeline stress-deformation data.

The invention provides a pile foundation perpendicularity deviation-based construction quality diagnosis method, which comprises the following steps of: acquiring multi-modal time sequence data in real time, including tilt angle sensor three-dimensional attitude, geological radar stratum characteristics, piling equipment hammering energy and stratum resistance feedback, and realizing cross-modal synchronization through a high-precision timestamp; after the data accuracy is improved through multi-stage filtering and preprocessing, causal variable pairs with physical rationality are screened by adopting time delay mutual information and nonlinear Granger causal examination, and a Bayesian causal atlas structure is optimized in combination with a rock-soil mechanics mechanism; geological prior knowledge is introduced to enhance the physical interpretability of the graph, and new data distribution changes are coped with through causal stability detection and incremental structure reconstruction; according to the method, the effects of different intervention measures can be simulated based on causal inference, efficient and economical construction correction suggestions are output in combination with multi-objective optimization and a visual causal path, and intelligent closed-loop control over the perpendicularity and quality of the pile foundation is achieved.

The present invention discloses a rock and soil static side pressure simulation device and an effective stress calculation method, wherein the rock and soil static side pressure simulation device includes a metering cylinder, a liquid inlet box, a test cylinder, a liquid outlet box and a metering cylinder; a support structure is provided on the top of the liquid inlet box, the support structure includes a hydraulic oil cylinder and an axial force gauge, the axial force gauge is provided on the top of the liquid inlet box, and the hydraulic rod of the hydraulic oil cylinder is pressed against the axial force gauge; a plurality of pressure sensors are provided on the side of the test cylinder. The present invention provides a rock and soil static side pressure simulation device and an effective stress calculation method, which can directly measure the rock and soil static side pressure of reshaped soil or original soil taken on site, directly simulate the actual situation of the rock and soil on the foundation pit side, and make the foundation pit static side pressure test results more accurate. At the same time, it breaks through the traditional concept of Terzaghi's effective stress and proposes a new effective stress calculation formula to provide support for the development of theoretical soil mechanics.

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 invention relates to the field of rock-soil pressure testing, and discloses a pressure assembly for testing rock-soil mechanical characteristics of a landslide rock mass and a testing method.The pressure assembly comprises a testing box body, a charging bucket is fixedly installed on the testing box body, an air cylinder is fixedly connected to the testing box body, and a pressure plate is fixedly installed at the output end of the air cylinder; a detecting and discharging mechanism is arranged in the charging barrel, the detecting and discharging mechanism comprises a cutting tool and a bottom plate connected to the charging barrel through a torsional spring, and a barrel wall plate is arranged on one side of the testing box body. The directional block slides towards one ends of the limiting baffles along the directional column by pulling the sliding column, the sliding column slides along the chamfering groove between the limiting baffles on the two sides, the limiting baffles on the two sides are gradually pushed away towards the two sides, and the cutting tool at the top end of the sliding column cuts rock soil in the charging barrel. Rock soil in the charging barrel is divided into three parts by the surrounding cutting tools, the compacted rock soil can be more efficiently decomposed into small blocks through side cutting, and subsequent discharging treatment is facilitated.

The present application relates to a kind of active unloading sheet pile revetment reinforcement design method and structure, belong to revetment reinforcement technical field, by determining channel parameter and soil mechanics characteristics, design reinforcement pile is arranged with original pile foundation elevation along the back of revetment, based on soil arch effect establishment pile spacing calculation formula, and through adjusting pile diameter control design reinforcement pile load sharing ratio;The reinforcement structure designed by the method includes: prestressed sheet pile, pile cap, design reinforcement pile, gravity retaining wall, slope surface layer, concrete roof, original mud surface line and design mud surface line, design reinforcement pile diameter and pile spacing are dynamically adjusted according to dredging depth, the thicker the dredged soil layer is, the greater the soil pressure is, the larger the pile diameter is, and the closer the spacing is.The present application does not need to remove the upper structure of original revetment, greatly saves construction period and reduces resource waste;Revetment leading edge line does not move forward, does not affect the use of existing navigable water area;Construction mode is flexible, can be selected onshore dry land or water construction according to surrounding conditions, short construction period, fast speed, low engineering cost.

The utility model belongs to the technical field of rock-soil mechanical analysis, and particularly relates to a model test device for measuring the stability safety coefficient of a rock slope, which comprises a test mechanism, a driving mechanism and a rock slope model, the test mechanism comprises a box body, an opening, an insertion plate and a bump, the opening is arranged on the right side of the box body, the insertion plate is inserted into the top of the opening, and the bump is arranged on the right side of the box body. A bump is arranged on the left side of the bottom of the plugboard; the driving mechanism is arranged on the left side of the box body; the rock slope model is arranged in the box body, the movable end of the driving mechanism drives the rock slope model to incline in the box body, the moving state of the rock slope is simulated, the box body does not move in the testing process, the box body is prevented from toppling due to moving, and therefore potential safety hazards in the testing process are reduced.

The application relates to the technical field of underground engineering and geotechnical mechanics, and provides an underground engineering blasting simulation method based on secondary development of ABAQUS, which comprises the following steps: step 1, a geometric model is established, and a calculation region is divided into an Euler domain and a Lagrange domain; step 2, a JH-2 constitutive model is called and realized through a UMAT user subroutine interface of ABAQUS; step 3, a JWL state equation is used for modeling in the Euler domain; step 4, a coupled Euler-Lagrange method is applied; step 5, boundary conditions and blasting loading parameters of the geometric model are set; and step 6, transient dynamics calculation is carried out, and results are output for analyzing blasting effects. The scheme not only can provide a high-precision numerical test platform for underground engineering blasting design and safety control, reduces engineering risks, optimizes blasting parameter configuration, but also has remarkable engineering application value and popularization significance.

An integrated device for measuring expansive deformation-expansive force-shear strength of expansive soil belongs to the technical field of rock-soil mechanics tests and comprises a frame assembly, a force application assembly, a water bath assembly, a shear box assembly and a monitoring assembly. The force application assembly is arranged on the frame assembly; the water bath assembly is arranged in the frame assembly; the shear box assembly is arranged in the water bath assembly; the monitoring assembly is arranged on the frame assembly and the shear box assembly. According to the integrated device for measuring the expansive deformation-expansive force-shear strength of the expansive soil, disclosed by the invention, the shear strength can be directly measured after the expansive deformation or expansive force measurement is carried out on the same expansive soil sample, and the axial expansive force and the radial expansive force can be obtained after the expansive soil sample generates certain expansive deformation; accurate data support is provided for deep research of expansive force anisotropy of expansive soil, investment of samples, equipment and time cost is greatly reduced, and mechanical properties of expansive soil in nature can be reflected more truly.

The invention relates to the technical field of foundation pit deformation monitoring and prediction, in particular to a foundation pit deformation prediction method and system based on time sequence analysis. Comprising the steps of extracting hour-level propagation characteristics and a propagation rate attenuation index by establishing an instability case library, identifying an instability source candidate region by adopting a non-local gradient, and determining a propagation acceleration factor according to comparison between a time change rate and the propagation rate attenuation index, and when a plurality of instability sources exist, calculating a wave superposition coefficient and carrying out under-consolidation correction to obtain an expansion speed, calculating a remaining time window according to the expansion speed and the propagation path, and when the remaining time window is smaller than an early warning threshold value, dynamically matching a historical statistical rule with a current actual working condition through a time axis compression technology to obtain a final prediction result. According to the method, the two-dimensional attenuation model of the unstable wave space and time is constructed, the soil mechanics mechanism and the fluctuation propagation theory are combined, and the timeliness and accuracy of foundation pit deformation prediction of the short and urgent engineering are remarkably improved.