6 results about "Soil classification" patented technology

The application discloses a method for obtaining soil strength indexes based on soil layer geophysical prospecting data, and comprises the following steps: S1, obtaining the test depth and equivalent shear wave velocity of different measuring points in a target site; obtaining the drilling samples of each measuring point at the corresponding depth, obtaining the corresponding internal friction angle and soil type; preprocessing the collected data to obtain a comprehensive data set; S2, selecting the test depth and equivalent shear wave velocity in the comprehensive data set as basic features, constructing derived features, performing feature standardization, and obtaining a data set; dividing the data set into a training set and a test set; S3, based on the training set obtained in S2, optimizing and training the soil classification model and the internal friction angle prediction model; S4, obtaining the soil strength index internal friction angle based on the soil classification model and the internal friction angle prediction model obtained by the training in S3. The method of the application realizes high-precision prediction of soil strength indexes by constructing derived features and introducing physical range constraints.

The application discloses a soil undisturbed soil sampling device for black soil classification and partitioning, which is used for sampling deep soil A and relates to the technical field of soil sampling, and comprises a guide cylinder, which is obliquely extended into deep soil, a side opening is formed in the side wall of the guide cylinder, the side opening is located below A, and the axis of the side opening passes through A; a position adjusting assembly, which has a position adjusting end, the position adjusting end can adjust the depth of the extension into the guide cylinder; an adjuster, which is fixed to the position adjusting end and has an extension end, the extension end can move along the radial direction of the guide cylinder; and a sampling assembly, which is arranged on the extension end, the application avoids the process that the sampling tool penetrates the soil layer above the target sampling point, maximally eliminates the disturbance to the soil at the target sampling point, and maximally maintains the undisturbed structure of the soil.

This invention belongs to the technical field of geotechnical engineering and earthquake engineering, and provides a method based on CPT and V s The joint testing method for liquefaction assessment, which considers the geological age effect, can quantitatively characterize the geological age effect of soil, combine the advantages of CPT and Vs tests, and does not require precise soil age information. The technical solution adopted includes the following steps: S1, in-situ test data acquisition, including static cone penetration test and shear wave velocity test; S2, parameter normalization processing, calculating normalized cone tip resistance and normalized shear wave velocity, and then introducing the soil classification index to obtain the normalized cone tip resistance of equivalent pure sand; S3, establishing the correlation between benchmark static cone penetration test and shear wave velocity; S4, determining the geological age aging factor of soil; S5, constructing a comprehensive evaluation index considering geological age; S6, establishing a liquefaction assessment model; S7, determining the liquefaction discrimination probability threshold; S8, evaluating the site liquefaction potential.

The application discloses a soil classification and map compilation method, and particularly relates to the technical field of soil investigation and remote sensing image processing, and comprises the following steps: acquiring remote sensing images, surface images, sampling point data and elevation data of a target region; performing resampling and spatial position alignment on the remote sensing images and the surface images, and projecting the sampling point data and the elevation data into an image coordinate system after alignment to output scene data; calculating spectral difference values, texture difference values, slope difference values and coverage difference values according to the scene data according to image positions, extracting regions with difference values and continuous regions larger than surrounding image elements, and outputting candidate boundary zones; and positioning through multiple sources, extracting the candidate boundary zones, accumulating differences on both sides of the zonal units, and connecting soil boundaries, wherein the scheme further constrains the grid recognition result to a continuous boundary formation process, relatively suppresses patch fragmentation, boundary swing, mis-cutting and mis-splicing, and is beneficial to stably converting the soil recognition result into soil boundaries which can be directly compiled into maps.

This invention belongs to the technical field of geotechnical engineering and earthquake engineering, and provides a site seismic delineation method based on the correlation between static cone penetration test (CPT) and shear wave velocity, fully combining CPT and V s The advantages of the two testing methods are that by introducing characteristic parameters reflecting the degree of soil aging, a more reasonable classification of seismic sites can be achieved, thereby improving the scientific nature of site classification and the reliability of seismic design. The method includes the following steps: S1, in-situ test data acquisition, including static cone penetration test and shear wave velocity test; S2, parameter normalization processing, calculating normalized cone tip resistance and normalized shear wave velocity, and then introducing soil classification index to obtain the normalized cone tip resistance of equivalent pure sand; S3, establishing the correlation between benchmark static cone penetration test and shear wave velocity; S4, determining the soil geological age aging factor; S5, constructing a comprehensive site seismic classification index; S6, site seismic category classification; S7, engineering application and result output.