98 results about "Permafrost Region" patented technology

The invention relates to a permafrost region monitoring method and device based on digital twinning, computer equipment and a medium. The method comprises the following steps: acquiring a hydrogeological model of a permafrost region and multi-source state data acquired from a road full section of the permafrost region; combining the preprocessed multi-source state data and the hydrogeological model to obtain a physical model of the permafrost region, and coupling the physical model, a pre-trained data model and a neural network model to obtain an initial digital twinborn model; driving the initial digital twin model to perform virtual mapping to obtain mapping state parameters; based on the mapping state parameter and a first actual state parameter of the permafrost region, performing reliability evaluation on the initial digital twinborn model to obtain an evaluation result; and when the evaluation result shows that the initial digital twinborn model is reliable, obtaining the digital twinborn model so as to monitor multiple hydrological parameters of the permafrost region by using the digital twinborn model. According to the method, the underground water in the permafrost region can be comprehensively and accurately monitored.

The application discloses a simulation method and system for engineering geological survey in alpine permafrost regions based on digital twinning, and relates to the technical field of engineering geological survey.The method comprises the following steps: obtaining multi-source heterogeneous data to construct a digital base; constructing a thermal-water-force-fracture multi-field coupling physical model based on the phase field theory; constructing a generative adversarial network as a time reversal engine to learn the mapping from the current state to the past state; inputting the current measured state into the time reversal engine to generate a historical evolution sequence, and comparing the historical evolution sequence with actual geological relics to dynamically calibrate model parameters; loading future climate scenarios to perform forward prediction, and fusing monitoring data through Kalman filtering to form a closed-loop corrected digital twin; and outputting a risk thermodynamic map, a fracture connectivity atlas and an engineering warning level based on the prediction result.The method can realize dynamic calibration and real-time early warning of the engineering geological model in the permafrost region, and improve the accuracy and calculation efficiency of the prediction of engineering geological disasters in cold regions.

The present application relates to a kind of permafrost region oil and gas pipeline's pipe embankment structure and intelligent control method.The pipe embankment structure includes fill layer, pipeline protection layer, crude oil pipeline, gas pipeline, intelligent control system, fine sand layer, heat preservation layer, heat flow sensor, drainage ditch, benchmark heat flow sensor.By reasonable layout crude oil pipeline (positive temperature operation) and gas pipeline (negative temperature operation), in combination with heat flow sensor real-time monitoring energy flow, and trigger abnormal alarm when energy abnormal change.At the same time, using intelligent control system real-time acquisition pipeline and frozen soil layer temperature data, dynamically adjust the operating temperature of gas pipeline, optimize heat effect control.The technical scheme provided by the present application can be reasonably laid out and dynamically regulated, effectively govern the degradation of underlying permafrost under crude oil pipeline, while slowing down the frost heaving deformation of soil around gas pipeline, thereby significantly improving the thawing and frost heaving problems caused by oil and gas pipeline in permafrost region.

The application provides a method for improving the recovery of natural gas hydrates in permafrost regions. The method comprises the following steps: (1) discharging free gas from the target permafrost region natural gas hydrate reservoir by depressurization, so that the reservoir temperature of the target permafrost region natural gas hydrate reservoir is less than 0 DEG C and greater than or equal to -6 DEG C, and the reservoir pressure reaches 0.8-1.2 times the phase equilibrium pressure of the natural gas hydrate; (2) injecting a mixed gas of CO2 and H2 into the target permafrost region natural gas hydrate reservoir for multiple rounds of throughput sweeping; wherein, between each round of throughput sweeping, huff and puff is carried out, and the temperature of the target permafrost region natural gas hydrate reservoir is maintained at less than 0 DEG C and greater than or equal to -6 DEG C; (3) after the throughput sweeping is completed, injecting CO2 into the target permafrost region natural gas hydrate reservoir for sweeping to recover free H2 and for geological storage of CO2. The method can significantly improve the recovery of natural gas in permafrost regions, effectively ensure the stability of the reservoir, and achieve geological storage of carbon dioxide.

The invention relates to a hot rod effective power evaluation method based on spatial distribution characteristics of a soil body temperature field, and is suitable for permafrost region engineering. The method comprises the following steps: selecting a hot rod which works stably, arranging temperature measuring holes on a horizontal section of a vertical axis in the middle of an evaporation section according to a near field, a middle field and a far field, and obtaining soil body temperatures T at different radial distances r; based on the steady-state heat conduction theory, regression analysis is carried out on measured data, a mathematical model T = C1 * ln (r) + C2 is constructed, and a coefficient C1 is solved; and combining the heat conductivity coefficient lambda of the soil body with the effective length L of the hot rod, and calculating the effective refrigeration power of the hot rod on the soil body by utilizing a formula Q =-2pi lambda LC1. The method does not need to pre-embed a sensor, does not interfere with the operation of the hot rod, and can include the contact thermal resistance influence between the hot rod and the soil body. The method has the advantages of high measurement precision, low cost and the like, and realizes in-situ and quantitative evaluation of the actual refrigeration efficiency of the existing engineering hot rod.

This utility model discloses a heat-insulating and ventilated composite structure for roadbed in permafrost regions of plateau areas. It includes a permafrost foundation, with ventilation mechanisms installed inside each foundation for road cooling. These mechanisms include ventilation ducts laid on the upper surface of the permafrost foundation, each duct connected to a connecting pipe. Protective netting is installed at the ends of the ventilation ducts. By installing heat-conducting rods and heat-dissipating fins inside the ventilation and connecting pipes, heat from the precast concrete slab and its surroundings can be quickly transferred into the ventilation and connecting pipes. Furthermore, heat dissipation is rapid while the ventilation ducts are ventilating, reducing the impact of roadbed heat on the permafrost foundation. By installing concrete pillars inside the permafrost foundation and laying precast concrete slabs on top of these pillars, the load-bearing capacity is increased, preventing large vehicles from squeezing the roadbed and causing damage to the ventilation ducts.

The invention provides a self-heating anti-freezing drainage pipeline system for a plateau permafrost region and a control method of the self-heating anti-freezing drainage pipeline system, and belongs to the technical field of engineering drainage in cold regions. According to the self-heating anti-freezing drainage pipeline system for the plateau permafrost region and the control method of the self-heating anti-freezing drainage pipeline system, the self-heating anti-freezing drainage pipeline system comprises a self-heating pipeline module, an energy supply module and an intelligent control module, and the self-heating pipeline module comprises a pipeline body and an integrated electric heating layer. By arranging the pipeline system composed of the self-heating pipeline module, the energy supply module and the intelligent control module, the integrated effect of energy self-supply, intelligent sensing and active anti-freezing in the plateau frozen soil area without the power grid is achieved, the unfreezing rate is calculated through captured data through configuration of the intelligent control module, and the unfreezing efficiency is improved. The parameter dynamically reflects the efficiency of freezing and melting, so that the system can accurately put energy based on the efficiency, and the problems of energy dependence and anti-freezing reliability are fundamentally solved.

The invention relates to the technical field of outdoor equipment, in particular to a high-frequency impact type tent peg rapid fixing and pulling device suitable for a plateau frozen soil area. The device comprises an equipment body which is internally provided with a hydraulic cavity, a control cavity and a sealing cavity; the high-frequency impact unit is composed of a transmission rod and two first pistons, the top end of the transmission rod extends into the sealing cavity filled with nitrogen, and an impact head with a detachable limiting rod is installed at the bottom end of the transmission rod. The control unit is composed of two second pistons which are combined through a connecting column; the hydraulic mechanism is connected with all the cavities through a pressurizing pipe and a liquid return pipe which are connected in parallel, connecting pipes are arranged between the cavities, and high-frequency reciprocating motion of the impact head under hydraulic driving is achieved. And in combination with a self-adaptive supporting seat at the bottom of the equipment, the ground nail is quickly pulled out from frozen soil by utilizing upward thrust of high-frequency impact, so that the effect of one machine with two purposes is achieved, the problems of difficulty in pulling and low efficiency in a plateau frozen soil environment are effectively solved, and the device has the advantages of simplicity and convenience in operation, strong force, high efficiency, high adaptability and high reliability.

The invention relates to a lithology identification method for a hydrate reservoir in a frozen soil region. The method comprises the following steps: collecting hydrate drilling well logging data in a frozen soil region, and establishing a sample set; performing windowing processing, standardized preprocessing and lithology label coding on the sample set to form a sequence sample suitable for deep learning; constructing a hybrid neural network model combining a convolutional neural network and a long-short term memory network (CNN-LSTM), extracting local spatial features in the logging data by using a convolutional layer, and extracting time sequence features of lithologic evolution by combining an LSTM layer; key hyper-parameters of the model are globally optimized based on a Bayesian optimization algorithm, the number of convolution kernels, the number of LSTM units, the Dropout proportion and the learning rate are included, and the classification performance and generalization ability of the model are improved; and utilizing the trained optimal CNN-LSTM model to carry out lithology automatic identification and classification on the frozen soil region hydrate reservoir. According to the method, through combined extraction of convolution and time sequence features, the recognition precision and robustness of complex lithology of the hydrate reservoir in the permafrost region are effectively enhanced, meanwhile, the Bayesian optimization method is introduced to improve the model parameter adjustment efficiency and stability, and reliable technical support can be provided for fine description and resource evaluation of the hydrate reservoir.

The application discloses a kind of frozen soil area pumping drainage type pressure steam pre-melting method and system, comprising: surveying the deformation of surface, selecting frost heaving and uneven settlement disease serious road section, determining the depth and range of soil ice layer;Steam injection hole is arranged above the soil ice layer treatment layer on the side of roadbed slope, pumping drainage hole is arranged in the center of roadbed;Steam generator is heated and injected into soil ice layer, while pumping drainage, steam target melting ice is realized;While steam heating and pumping, monitoring pre-melting progress and effect are carried out using geophysical prospecting method.The high-temperature steam is transported to the interior of soil body by steam pipe, when high-temperature steam contacts with low-temperature soil body, heat conduction occurs, solid ice in the interior of frozen soil melts, after all the ice-rich frozen soil and soil ice layer in the climate warm and humid influence range are melted, the melting range is accurately controlled by pumping drainage, the bearing capacity of foundation is improved, and the possible deformation of frozen soil melting settlement is reduced.

This invention relates to the field of natural gas pipeline safety treatment technology, and provides a method, apparatus, electronic device, and storage medium for obtaining frost heave in permafrost areas. The method includes: determining a surface temperature function; determining a constant temperature at a first depth below the surface; constructing a finite element model of the permafrost region calculation area based on the surface temperature function, the first depth, and the constant temperature; applying boundary conditions to the finite element model to obtain the time it takes for a freezing front to reach the lower edge of each grid layer in an M-layer grid from the surface down within the time range of the surface temperature function, as well as the temperature gradient at the location of the freezing front; and determining the frost heave based on the time and the temperature gradient. This method enables rapid and accurate determination of frost heave, providing fundamental data for the safety assessment of buried pipelines.

This invention discloses a remote sensing classification method and device for periglacial landforms. The method includes: establishing remote sensing classification rules for periglacial landforms, dividing periglacial landforms into primary and secondary periglacial landform types; collecting remote sensing images and digital elevation model data of the target area in permafrost regions at various resolutions, and performing radiometric calibration and atmospheric correction on the remote sensing images; performing first-scale segmentation and second-scale segmentation on the processed data to generate two-level image object layers, with the first-scale segmentation generating a primary image object layer corresponding to the primary periglacial landform type and the second-scale segmentation generating a secondary image object layer corresponding to the secondary periglacial landform type; extracting and analyzing features for each image object in the primary and secondary image object layers; and, based on the remote sensing classification rules for periglacial landforms, classifying the image objects in the primary and secondary image object layers into the corresponding primary and secondary periglacial landform types, respectively, and outputting a remote sensing classification map of periglacial landforms.

The present disclosure provides a permafrost mountainous hydrological simulation method and system based on space-ground-air integrated monitoring, relating to the technical field of hydro-meteorological monitoring and water resources forecasting. The method comprises: obtaining permafrost hydrological monitoring data of a permafrost region through space-ground-air multi-monitoring equipment; the permafrost hydrological monitoring data comprises permafrost state and precipitation data; assimilating the permafrost hydrological monitoring data into a distributed hydrological model coupled with a permafrost runoff generation process to obtain a first distributed hydrological model; simulating runoff processes under different permafrost states and permafrost underlying surface hydrological characteristics through the first distributed hydrological model to dynamically quantify precipitation-runoff conversion efficiency. The present scheme can accurately simulate the runoff process in the permafrost region, and then reliably dynamically quantify the precipitation-runoff conversion efficiency.

The utility model provides a frozen soil area landslide key part temperature and humidity field long-term dynamic monitoring device, and relates to the technical field of intelligent equipment, and the device comprises a measurement control host which is connected with a first PVC hard pipe and a second PVC hard pipe through a cable; the first PVC hard tube and the second PVC hard tube are respectively provided with a power supply electrode and a measuring electrode; third containing holes are formed in the second PVC hard pipe at intervals of a third preset distance, and a temperature measuring probe is contained in each third containing hole. The corresponding electrodes are supported by the two PVC hard tubes, the temperature measuring probe is buried underground to work for a long time, the water content profile is converted into the resistivity profile based on an indoor soil test, and in-situ dynamic long-term monitoring of the soil water content profile and the temperature of the key part of the landslide is achieved. The device can help to analyze soil freeze-thaw states and daily freeze-thaw cycle processes of different parts of the landslide and moisture infiltration processes of key parts of the landslide under rainfall conditions and freeze-thaw conditions, and is simple in structure, efficient and reliable.

The application provides a design method of a ventilation pipe foundation in permafrost regions based on the principle of heat balance, aiming to maintain the heat balance of the lower permafrost under the foundation and ensure its long-term thermal stability. The method involves collecting meteorological data, soil physical parameters, and permafrost upper limit and ground temperature distribution information to assess whether additional protection measures are needed and to determine the burial height of the ventilation pipe foundation. Based on the selected ventilation pipe configuration, the corresponding wind speed calculation formula is used to calculate the wind speed in the pipe, and the convective heat transfer coefficient is determined. Combined with the convective heat transfer coefficient and economy, the pipe diameter is determined. Further determine the cooling radius and the best operation mode of the ventilation pipe foundation to ensure the heat balance of the foundation bottom and effectively protect the lower permafrost under the foundation. The design method is simple, fast and accurate, and has important engineering application value and wide applicability.

The invention relates to the technical field of engineering monitoring in a frozen soil region, and particularly discloses a remote monitoring and diagnosis system for a working state of a hot rod in a frozen soil region based on edge calculation, which comprises the following steps of: constructing a thermodynamic state matrix with a space-time correlation characteristic by deploying a multi-source sensor to synchronously collect temperature, pressure and environment wind speed data of a key part of the hot rod; a feature extraction method combining multi-scale decomposition and physical constraint is adopted to generate nonlinear dynamic response features capable of distinguishing environmental interference and real faults; a multi-dimensional diagnosis vector is constructed based on phase-space reconstruction and trajectory analysis, and comprehensive health degree parameters are generated through feature level fusion in combination with real-time environment parameters; a health state classification model with a fuzzy boundary is established, and four-level health level judgment considering the duration effect is achieved; through correlation analysis of environment disturbance and state evolution, an edge-cloud collaborative adaptive optimization mechanism is constructed.

The invention discloses a permafrost region plateau railway ventilation pipe roadbed convective heat transfer coefficient calculation method, which comprises the following steps: S1, arranging a wind speed sensor at the slope toe of a railway roadbed to obtain wind speed data; s2, calculating the average wind speed in the ventilation pipe by considering the wind loss according to the measured data of the external wind speed; s3, the flowing state of air fluid in the ventilation pipe is judged; s4, according to the flowing state, the length of the hot inlet section of the ventilation pipe and the average Nusselt number are calculated; and S5, calculating the convective heat transfer coefficient between the inner wall of the ventilation pipe and the air. According to the method, air fluid in the ventilation pipe is divided into three flowing states, the ventilation pipe is divided into a heat inlet section and a heat full development section, factors such as time, air speed, air thermophysical property, seasons and the position in the ventilation pipe are considered when the convection coefficient is calculated, and a clear analytical formula is provided; and a simplified hypothesis that a convective heat transfer coefficient is defined as a constant in the conventional design is avoided.

The utility model relates to the technical field of wetland moss collection, and discloses a permafrost region wetland moss collection device which comprises a supporting plate, supporting legs are fixedly connected to the bottom of the supporting plate, a handrail is fixedly connected to the top of the supporting plate, and a collection box is arranged at the top of the supporting plate. A first electric sliding rail is fixedly connected to the bottom of the supporting plate, a second electric sliding rail is arranged at the bottom of the first electric sliding rail, a movable collecting mechanism is arranged at the top of the supporting plate, and an auxiliary collecting mechanism is arranged at the bottom of the second electric sliding rail. A second motor works to enable a residual gear to rotate, left-right reciprocating motion of a plate cutting frame is conveniently achieved, the moss sampled in the plate cutting frame is shaken, soil and the moss are separated, and the height of a drill bit is conveniently adjusted through rotation of a first bevel gear.

The invention discloses a water source conservation function evaluation method suitable for a high and cold frozen soil region, and belongs to the field of water source conservation function evaluation.The method comprises the steps that a monitoring network is laid in a drainage basin of the high and cold frozen soil region, and monitoring data are collected; the monitoring data comprises meteorological data, frozen soil data, hydrological data and vegetation and underlying surface data; improving the VIC frozen soil hydrological model by using the monitoring data; determining constraint conditions of the improved VIC permafrost hydrological model based on a permafrost characteristic water source conservation mechanism, and simulating each component of water balance of the high and cold permafrost region drainage basin by using the improved VIC permafrost hydrological model; and based on each component of water balance of the drainage basin of the high and cold frozen soil region, calculating the water conservation amount by using a water balance equation, and obtaining the water conservation capability according to the water conservation amount to complete water conservation function evaluation. According to the invention, key processes such as frozen soil thermal conductivity overestimation abnormity and accumulated snow sublimation effect supplementation are eliminated, and the simulation precision of the hydrothermal transmission process is improved.

The invention relates to a permafrost region highway subgrade deformation monitoring device which comprises a total station, a heat preservation cylinder and supporting legs. A laser centering device is arranged at the centroid position of the bottom face of the heat preservation barrel, a mounting base is arranged in the heat preservation barrel, a threaded shaft in threaded connection with the mounting base is arranged in the heat preservation barrel, and a driving shaft capable of driving the threaded shaft to rotate is rotationally connected to one side of the heat preservation barrel. The method has the advantages that the total station can be leveled without standing until the temperature of the total station is balanced with the ambient temperature, and the total station is started for monitoring. When a monitoring position is replaced, the total station can be directly stored in the heat preservation cylinder, after the total station is carried to a target point position, the laser centering device is firstly used for centering, then the driving shaft and the threaded shaft are used for driving the total station to move upwards, and then the monitoring work can be continued. And the steps of dismounting and mounting are omitted, so that the working time of the total station in a low-temperature environment is effectively shortened, and the total station can be prevented from being damaged due to long-time low-temperature environment.

The invention relates to the technical field of mud drilling slag low-temperature stabilization evaluation, in particular to a mud drilling slag low-temperature stabilization evaluation method for a plateau permafrost region highway construction period. The method comprises the following steps: collecting a slurry drilling slag sample and carrying out preliminary analysis to obtain initial data; performing a freeze-thaw cycle simulation experiment in a low-temperature environment based on the initial data to obtain performance parameters of the slurry drilling slag sample, and introducing a multi-stage kinetic model and a local evolution stability algorithm to obtain a sample stability index and a local evolution stability index; and based on the sample stability index, introducing a dynamic adjustment method based on a stability difference equation to obtain an overall stability variable quantity, and comprehensively evaluating the low-temperature stabilization treatment effect by combining the sample stability index and the local evolution stability index to obtain a comprehensive stability evaluation index. The technical problem that the stabilization treatment effect cannot be accurately and stably evaluated due to the fact that a traditional stability evaluation method is not accurate enough in slurry bonded slag analysis is solved.

The invention provides a permafrost region transverse thermal disturbance sensitive route selection method and system, and the method comprises the steps: building a transverse thermal disturbance distance model based on obtained multi-source monitoring data, and defining the thermal disturbance punishment through the planning of the relation between a horizontal distance and a transverse thermal disturbance distance; and constructing a fitness vector based on the thermal disturbance penalty, the engineering information and the line length. And carrying out particle optimization by adopting a multi-target intelligent optimization algorithm to carry out Pareto optimal solution screening so as to determine an optimal candidate route. And for the optimal candidate route, calling a physical information neural network to solve a thermal-mechanical coupling equation set, then carrying out three-dimensional finite element inspection, and generating a comparison and selection report including the optimal route, the construction cost, the environmental risk and thermal disturbance evaluation under the condition that the inspection is passed. According to the scheme, transverse thermal interference between new and old lines or parallel lines can be accurately avoided at the line selection source, the permafrost degradation and differential settlement risks are reduced, the corridor resource utilization efficiency is improved, and good engineering applicability and popularization value are achieved.

The invention provides a plateau permafrost region grounding electrode state detection method and device, and the method comprises the steps: obtaining parameters such as soil temperature and humidity through a multi-sensor integrated monitoring probe, and constructing a permafrost region resistivity correction model; processing a model output value by applying a dynamic compensation Kalman filtering algorithm to obtain a dynamic correction soil resistivity; and the host fuses the data with the electromagnetic signal acquired by the electromagnetic signal receiving sensor, and outputs the distribution state of the grounding electrode, thereby improving the detection precision of the plateau permafrost region.

This invention relates to a construction method for engineering piles suitable for permafrost regions, belonging to the field of pile foundation engineering technology. The steel pile structure used in this invention includes a vertically arranged steel pipe pile body. A coaxially arranged annular support plate is fixedly connected to the outer wall of the bottom end of the steel pipe pile body. A sleeve coaxial with the steel pipe pile body is fitted around its outer periphery. The lower end sidewall of the sleeve tapers into a sharp point to form a pile tip. Multiple sleeve pin connection grooves are provided on the lower inner sidewall of the sleeve above the pile tip. Each sleeve pin connection groove is equipped with a corresponding pin. When the steel pipe pile body and the sleeve are fixed together by the pins, the outer wall of the steel pipe pile body, the annular support plate, and the inner wall of the sleeve form a pre-filled material receiving cavity. An automatic separation structure is provided between the steel pipe pile body and the sleeve. During construction, coarse sand is pre-filled into the pre-filled material receiving cavity. The steel pipe pile body and the sleeve are driven into the soil to a set depth using static pressure or hammering. Finally, the sleeve is pulled out.

The invention discloses a water pumping device suitable for a roadbed side accumulated water active condition in a permafrost region of the Qinghai-Tibet Plateau, a power fan is used for capturing natural wind power resources, and a floating ball system and a reversing system jointly drive a water pumping pipe or a gaseous water pumping assembly to work according to water quantity difference in a water gathering well. The technical target of reducing the water content of the base soil body in the roadbed and road domain range is achieved; by means of the system, the high wind power resource utilization efficiency is achieved, and the engineering service performance of the system is improved; all the components are of metal mechanical structures, and the ratchet wheel set and the barrel shaft ratchet wheel set which are used for preventing a secondary mechanism from rotating under the inertia effect are arranged, so that the device has the advantages of being high in durability and low in construction cost; from the perspective of reducing the moisture content of the roadbed and the base soil body, the adverse effect of the soil body freeze-thaw cycle on the service performance of the frozen soil roadbed is prevented.

The application discloses a water-heat coupling numerical model melting depth discrimination permafrost type index distribution method, and relates to a soil index distribution method, which comprises the following processes: determining a melting area spatial distribution according to a melting depth process obtained through water-heat coupling simulation; combining a three-dimensional soil temperature field to discriminate permafrost and seasonal frozen soil grids, and obtaining spatial distributions of the two types of frozen soil; and according to the two types of frozen soil, solving and determining a permafrost depth spatial distribution of a permafrost area and a maximum frozen soil depth spatial distribution of a seasonal frozen soil area. The application effectively expands the application range of the water-heat coupling numerical model; compared with the prior art, the application has obvious improvement in the aspects of strong experience, insufficient mapping range, accuracy and fineness in frozen soil mapping, and is unable to discriminate frozen soil types, and overcomes the defect that the prior art fails to consider the melting area in permafrost mapping.

The present application provides a permafrost region surface stability evaluation report generation method and device, analyzes the time series cumulative deformation data of the pixels in each observation time period to obtain the annual average deformation rate corresponding to each pixel, the seasonal fluctuation amplitude corresponding to the pixel, the trend significance coefficient corresponding to the linear trend of the pixel and the variation coefficient corresponding to the time series cumulative deformation data of the pixel; according to the annual average deformation rate, the seasonal fluctuation amplitude, the trend significance coefficient and the variation coefficient corresponding to each pixel, the risk level is determined, and then the surface stability evaluation report corresponding to the target region is generated. The combination of long-term plastic deformation of frozen soil and short-term elastic deformation of active layer can accurately lock the composite type extremely high risk area with fast settlement and large fluctuation, strict data quality control, double statistical constraints of trend significance coefficient and variation coefficient, and realize the algorithm level active denoising mechanism, which can eliminate the false positive of geological disasters from the root.

The application belongs to the technical field of slope and gully treatment, and discloses a corrugated steel plate retaining wall anti-frost heaving structure in an alpine permafrost region, which comprises a thick graded sand and gravel soil layer; the corrugated steel plate is a flexible thin-walled structure, and its stress and deformation characteristics can effectively bear the soil pressure and frost heaving force when retaining soil in the permafrost region; the corrugated shape not only enhances the stability of the structure, but also effectively resists lateral soil pressure; when the water in the soil in the permafrost region decreases, the water gradually accumulates on the outer wall of the inclined rod, slides downward through the inclined surface of the inclined rod, and then moves to the outer wall of the outer wrapped water permeable geotextile, so that the water can quickly move to the surface of the outer wrapped water permeable geotextile and penetrate into the thick graded sand and gravel filter layer through the water permeability, thereby avoiding the retention of water in the permafrost layer and helping to reduce the frost heaving phenomenon caused by water freezing.

The application discloses a permafrost area bored pile active cooling construction device and method, the device includes refrigeration cycle system, temperature monitoring module, temperature analysis module and refrigerant control module, the initial temperature field of the temperature monitoring module real-time monitoring permafrost area bored pile soil and the temperature field change in the process of drilling, pouring and maintenance; the temperature analysis module analyzes and processes the data measured by the temperature monitoring module, calculates the delivery and circulation rate required by the refrigerant control module, and estimates and evaluates the cooling effect of the cooling construction device and the running time required to achieve the target cooling effect; the refrigerant control module controls the delivery and circulation rate of the refrigerant in the refrigeration cycle system and the running time of the circulation duration, thus completing a complete cycle of temperature monitoring, temperature analysis and refrigerant control. The application can shorten the construction period and efficiency, improve the initial bearing capacity of the permafrost pile foundation, and is beneficial to promoting the subsequent construction engineering.