18 results about "Soil saturation" patented technology

The invention provides a river levee flood control pile foundation stress analysis method and system, and relates to the technical field of river levee flood control pile foundation stress analysis. Multi-channel sensors are arranged on the pile top, the pile side and the pile end, and the sampling frequency is automatically switched along with the flood stage; inverting the soil saturation based on displacement and pore pressure change, dynamically correcting the permeability coefficient and the effective stress, and outputting a space-time coupling parameter matrix; determining a hazard source for the monitoring point, constructing an elliptical search domain by taking the hazard source as a center, and recursively incorporating abnormal points to form a risk area; a seepage-structure full-coupling finite element model is established in the risk area, the outside of the area is simplified through an equivalent spring boundary, and a pile foundation stress-strain field and a safety coefficient are calculated through self-adaptive time step control; and finally, generating a risk report according to safety factor classification, marking a high-risk area, automatically improving the sampling frequency and triggering early warning.

The invention relates to a quick mountain torrent disaster risk assessment method and system based on multi-source data fusion. The method comprises the following steps: performing space-time registration on multi-source data, constructing a dynamic factor matrix and a static geological parameter matrix, and calculating soil saturation; on the basis of the dynamic factor matrix, removing redundant factors, analyzing and generating a weight vector through an entropy method, on the basis of the effective factor set, the static geological parameter matrix and the soil saturation, correcting the rock-soil shear strength by quantifying the sediment deposition effect, obtaining the corrected rock-soil shear strength, and calculating the slope safety coefficient; and according to the coefficient, the effective factor set and the weight vector, generating a risk membership degree vector through fuzzy evaluation, calculating a risk feature value, identifying a disaster dominant type, and constructing a risk map. According to the method, through multi-source data space-time registration, redundant factor elimination, sediment deposition effect quantitative correction and the like, the efficiency and precision of mountain torrent disaster risk assessment are improved, and the support of an assessment result on disaster prevention and reduction decisions is enhanced.

The utility model provides a water conservancy retaining wall with backflushing drainage system, including retaining wall main part, high pressure pump and water storage tank, retaining wall main part left -hand end is fixed with heavy pressure board, and the drainage hole is opened between the inclined surface of heavy pressure board and retaining wall main part, and the interception filter screen is fixedly installed in the drainage hole, the high pressure shower head is installed in the interception filter screen right top, the drainage hole plate, the water seepage brick, the big granule sand and stone layer, the fibre filter screen, the metal filter screen and the PVC pipe are installed in retaining wall main part inside from top to bottom in proper order, and this design has solved the problem that the water inlet hole structure in the original device is too single, and once the blockage phenomenon occurs, it is inconvenient to carry out the problem of clearing and unblocking, the utility model designs a backflushing drainage structure, which can not only remove the blockage of the drainage hole, ensure the smoothness of the drainage system, prevent water accumulation from causing soil saturation, and effectively reduce the erosion of water on the inside of the wall.

A meter for continuous real time monitoring of soil moisture or alternative logging data associated soil moisture. The meter includes determining a value associated with soil saturation, soil nitrogen mineralization, and growing degree units. These values are made available to the user real time.

The invention relates to the technical field of slope engineering, and discloses a soil slope partition rainfall test device, a test box comprises a box body and a slope model, the slope model comprises a plurality of rainfall simulation areas, the bottom of a rain baffle is separated from the slope model, and a rainfall spraying mechanism comprises a water conveying pipe and a pressure nozzle. The rainfall simulation area located in the non-rainfall area is covered with a waterproof film, and a waterproof film is installed at the junction between the rainfall simulation area located in the non-rainfall area and the rainfall simulation area located in the rainfall area; the invention further discloses a test method of the soil slope partition rainfall test device. Test preparation; rainfall simulation: selecting a rainfall simulation area, covering a waterproof film and installing a rainproof plate; collecting data; according to the invention, the rainfall range of each region is effectively controlled, and precise simulation of local soil saturation, shear strength reduction and local failure mechanism of the slope under the rainfall condition is realized.

The invention discloses a hydropower full-time-domain optimization dispatching system and method based on multi-source data fusion, and relates to the technical field of hydropower dispatching. Meanwhile, the risk of the landslide hidden danger point to the hydropower station is analyzed by combining the distance between the landslide hidden danger point and the hydropower station, future rainfall abnormity is analyzed, and reservoir capacity data of the hydropower station is monitored by combining the current soil saturation, risk estimation of the landslide hidden danger point to the hydropower station and reservoir sediment abnormity risks caused by rainfall triggered landslide. According to the method, effective pre-judgment and risk assessment are carried out on the landslide hidden danger, the hydropower dispatching instruction is accurately triggered, the accuracy and controllability of risk early warning are improved, and the risk early warning efficiency is improved. And the refined and intelligent safety management requirements of the hydropower station are met.

The invention relates to the technical field of municipal drainage, and provides a municipal drainage method, system and equipment, and the method comprises the steps: obtaining a regional characteristic value according to a regional coefficient and a soil saturation index; acquiring a meteorological characteristic value according to the short-time rainstorm threat degree; obtaining a water quality characteristic value according to the BOD load threshold value and the sewage treatment urgency coefficient; and obtaining a comprehensive risk index according to the regional characteristic value, the meteorological characteristic value and the water quality characteristic value, and executing a corresponding drainage diversion strategy according to the comprehensive risk index. According to the method, the regional characteristic value is obtained through the regional coefficient and the soil saturation index, the comprehensive risk index is obtained through the regional characteristic value, the meteorological characteristic value and the water quality characteristic value, the regional characteristic is considered, and multi-dimensional data characteristics including the regional characteristic, the meteorological characteristic and the water quality characteristic are fused; and the limitation of single monitoring dimension of the municipal drainage system is overcome, and the anti-waterlogging capability and the sewage treatment efficiency of the drainage system are improved.

The invention discloses a multi-source monitoring system and method for surface soil saturation of a loess area of the Qinghai-Tibet Plateau, and relates to the technical field of remote sensing monitoring of soil saturation. The system comprises a surface soil moisture multi-source monitoring module, a surface soil moisture multi-source fusion module, a surface soil saturation monitoring module, a surface soil saturation condition analysis module, a geological disaster occurrence risk prompting module and a database. Fusing the multi-source soil moisture information to obtain the surface soil moisture and soil saturation of the Qinghai-Tibet Plateau loess area, evaluating the surface soil saturation state corresponding to the Qinghai-Tibet Plateau loess area, and analyzing the abnormal stage of the surface soil saturation state corresponding to the Qinghai-Tibet Plateau loess area and countermeasures. Therefore, multi-source monitoring of the corresponding surface soil saturation state of the loess area of the Qinghai-Tibet Plateau is achieved, and the defects of accuracy and coverage caused by single monitoring of the Qinghai-Tibet Plateau are overcome.

The invention discloses a mountain torrent disaster grading early warning method and system based on soil water content dynamic coupling, and belongs to the technical field of mountain torrent early warning. The method comprises the following steps: breaking through the limitation of a traditional static threshold by constructing a dynamic threshold model for multi-source soil humidity data fusion; a multi-stage early warning trigger mechanism is formed by combining a Kalman filtering real-time correction coefficient, and targeted information pushing and pre-arranged plan dynamic generation are achieved; the dynamic threshold model is constructed through a nonlinear regression model; the multi-stage early warning trigger mechanism comprises blue early warning: real-time rainfall is greater than or equal to 0.7 dynamic critical rainfall threshold; yellow early warning: R is greater than or equal to 0.85 dynamic critical rainfall threshold and the real-time soil water content is greater than or equal to 80% soil saturation water content; red early warning: R is greater than or equal to a dynamic critical rainfall threshold value and a soil liquefaction risk index gt; and 0.6. Through a soil water content dynamic coupling mechanism, three major pain points of data splitting, model stiffness and insufficient aging in mountain torrent early warning are solved.

The invention discloses a landslide simulation experiment device and method in a circulating freezing and thawing environment, and belongs to the field of geotechnical engineering and environment simulation. A landslide simulation experiment device in a circulating freeze-thaw environment comprises a simulation box and further comprises a water supply box which is fixedly connected to the side wall of the simulation box, a simulation assembly is arranged between the water supply box and the simulation box, a supporting plate is hinged to the interior of the simulation box, and a model positioning assembly is arranged on the supporting plate; the filter plate is fixedly connected to the interior of the simulation box, and an angle adjusting mechanism is arranged between the filter plate and the simulation supporting plate and used for adjusting the angle of the simulation supporting plate; the rainfall detection mechanism is arranged in the simulation box and used for detecting rainfall and soil saturation, and a vibration simulation mechanism is arranged between the filter plate and the supporting plate; according to the invention, the problems of poor accuracy, stability and experiment reliability of the landslide simulation experiment in the circulating freeze-thaw environment can be solved.

The present application relates to a kind of geological disaster prevention-oriented probability prediction model construction method, comprising the following steps, step one, physical constraint topology network construction;Step two, multi-parameter joint disturbance sample generation;Step three, cross sensitivity quantification module construction;Step four, physical regularization probability prediction model training;Step five, dynamic physical constraint correction mechanism.By generating disturbance samples in line with geophysical laws, covering typical geological disaster mutation scenarios such as soil saturation mutation, rainfall intensity step, slide zone formation critical point, significantly improving the prediction stability and generalization ability of the model under extreme geological conditions;Provide physical interpretable reliability support for geological disaster early warning decision, suitable for long-term geological disaster monitoring and early warning system, improve the continuous applicability and reliability of the model in practical engineering.

The invention relates to the field of electronic digital data processing, and discloses a surface soil humidity estimation method and device. The method comprises the following steps: acquiring a remote sensing image, soil residual water content thr and soil saturation water content ths of a research area; determining a normalized difference vegetation index (NDVI) and short wave infrared conversion reflectivity (STR) according to the remote sensing image; an NDVI-STR feature space is constructed based on the NDVI and the STR, dry and wet edge feature points of the NDVI-STR feature space are determined, and fitting is carried out based on the dry and wet edge feature points; obtaining a soil humidity relative value of a grid corresponding to the pixel by calculating a relative position relationship between the pixel in the feature space and the dry and wet edges obtained by fitting; the soil humidity relative value is reduced into the soil volumetric water content through the soil residual water content thr and the soil saturation water content ths to serve as a soil humidity predicted value. According to the method, the technical problem that the inversion precision is low due to the fact that the determination of the dry and wet edges in the NDVI-STR feature space is not considered is solved.

The invention relates to the technical field of soil measurement, in particular to an intelligent multi-channel soil saturated hydraulic conductivity measuring method and system.The intelligent multi-channel soil saturated hydraulic conductivity measuring method comprises the steps that a plurality of testing cutting ring tools are obtained, parameter collection is conducted on the testing cutting ring tools, a basic parameter set is obtained, the testing cutting ring tools are preprocessed, saturated testing soil is obtained, and a seepage flow sensor is obtained; the method comprises the following steps: monitoring the water outlet rate of saturated test soil to obtain a flow sequence, carrying out water supply cut-off judgment on the basis of the flow sequence to obtain a cut-off signal, obtaining saturated hydraulic conductivity on the basis of the cut-off signal and a basic parameter set, summarizing the saturated hydraulic conductivity to obtain a saturated hydraulic conductivity set, and obtaining a measurement report set on the basis of the saturated hydraulic conductivity set, and intelligent multi-channel soil saturated hydraulic conductivity measurement is completed. According to the invention, the problems of low measurement efficiency and low precision in the measurement process of the soil saturation rate at present can be solved.

The invention relates to the technical field of water conservancy projects, and discloses a channel side wall structure. According to the channel side wall structure, a traditional drainage belt is replaced with the penetrating type drainage pipe, special materials needed for laying the drainage belt are omitted, the pipe ditch excavation and pipeline laying cost needed by long drainage paths leading to the two ends of the channel can be further omitted, and therefore the construction cost is reduced. The one-way drainage valve is arranged at the outlet end of the drainage pipe, when the water pressure behind the wall is larger than the water pressure in the channel, the valve body is driven by the water pressure to be automatically opened, smooth drainage is guaranteed, and when the water pressure in the channel is larger than or equal to the water pressure behind the wall due to rising of the water level of the channel, the valve body automatically blocks the drainage pipe under the action of the water pressure and self gravity. The channel water can be prevented from flowing backwards into the backfill soil, and a series of new problems of backfill soil saturation, soil mechanical property deterioration, long-term hydrostatic pressure acting on the wall back and the like caused by flowing backwards are avoided.

This invention discloses a comprehensive soil saturation model and a critical saturation interval test method, comprising: step S1, constructing a large-scale model test system; step S2, setting up a monitoring system; step S3, data acquisition; step S4, establishing a comprehensive saturation dynamic model; step S5, determining the critical saturation interval; and step S6, qualitatively analyzing the distribution of the unsaturated zone. This invention, through large-scale model tests and a comprehensive saturation dynamic calculation model, achieves for the first time continuous monitoring of soil saturation throughout the entire vacuum preloading process, revealing the complete evolution law of saturation gradually decreasing from a saturated state.

The invention relates to a mountainous area house rainwater infiltration risk dynamic assessment method based on multi-source data fusion, and belongs to the technical field of infiltration risk assessment. The method comprises the following steps: collecting meteorological data, topographic data, soil data and house data; combining the meteorological data with the topographic data, and correcting the rainfall of the house through a gradient enhancement factor to obtain corrected meteorological data; compensating the soil saturation by using the model to obtain compensated soil data; integrating all the data to obtain a corrected data set; calculating a rainfall threat index, a terrain water storage index and a building vulnerability index based on the corrected data set, dynamically adjusting the weight of each index by adopting an adaptive weighting mechanism, and carrying out weighted fusion on each index to obtain a comprehensive risk value; and comparing the comprehensive risk value with a preset condition, triggering an early warning mechanism, and integrating resident feedback to optimize the weight of each index. The accuracy of dynamic assessment of the rainwater infiltration risk of the mountainous area house can be improved.

This invention provides a surface-groundwater coupling simulation and prediction method for sandy lake clusters, belonging to the field of groundwater numerical simulation technology. The invention collects borehole data, historical meteorological data, water level data, and remote sensing imagery to calculate the normalized vegetation index, backscattering coefficient, and surface soil saturation index. Then, based on the remote sensing images, it constructs a classification feature set, generates a geomorphic unit classification map, divides it into grid units, and calculates the equivalent permeability coefficient of each unit. Next, it extracts lake geometric parameters, combines gravity and wind-driven terms to calculate the equivalent lake water level, and generates the lakebed exchange flux based on Darcy's law. Finally, it constructs a groundwater level change equation to achieve dynamic prediction of future groundwater levels for each lake, improving the accuracy of hydrological prediction in sandy lake clusters.

The application discloses a kind of fine-grained soil saturation control test devices, it is related to geotechnical engineering equipment technical field, and its technical scheme main points are as follows: including round hole tray, moisture cylinder and with its airtight combination moisture cylinder cover, round hole tray is bolted with fine-grained soil sample, sample ring cutter, upper water-permeable stone and lower water-permeable stone, moisture cylinder cover is equipped with six round holes, is fixed with dropping tube in round hole through rubber plug, dropping tube outlet is opposite fine-grained soil sample, dropping tube is connected with hose, infusion bottle in sequence, hose is equipped with control switch;The application also discloses the test method of the test device: including the following steps: S1: sampling;S2: calculate water supplement amount;S3: fixed sample on round hole tray;S4: sample is placed in moisture cylinder;S5: install water supplement device;S6: continue to water;S7: calculate saturation, and carry out soil mechanics test.The application has the effects of reasonable structure, reliable performance, convenient operation, data acquisition is convenient, accurate, low carbon green, preparation efficiency is high.