A method and system for processing side pressure test data based on a LYH segmentation function

By using the LYH piecewise function model, combined with the first derivative of the slope and curvature analysis, the pressuremeter test data is automatically divided, which solves the problems of reliance on manual experience and unstable results in the existing technology. It realizes high-precision, fully automated data processing and is applicable to geotechnical engineering investigation of various strata.

CN122432435APending Publication Date: 2026-07-21江苏省水文地质工程地质勘察院有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
江苏省水文地质工程地质勘察院有限公司
Filing Date
2026-04-20
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing methods for processing pressuremeter test data rely on human experience, are highly subjective, have rough determination of boundary points, do not match the fitting model with the deformation mechanism, have low automation levels, poor versatility, and do not standardize the calculation of key pressure parameters, resulting in insufficient accuracy and stability of test results.

Method used

The LYH piecewise function model is adopted, and the boundary point is automatically located through the first derivative of the slope and curvature analysis. A three-stage soil deformation model is constructed, and the key pressure parameters are calculated by the intersection method to form a fully automated solution that is suitable for the deformation characteristics of different strata.

Benefits of technology

It achieves high-precision automated data processing, provides objective and consistent segmented results, standardizes the calculation of key parameters, has a wide range of applications, meets the needs of large-scale exploration, and supports data analysis of multiple types of strata.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present application relates to geotechnical engineering side pressure test data processing technical field, disclose a kind of side pressure test data processing method and system based on LYH segmented function, read original pressure P-displacement S data, pre-processing is standard measuring point;By preset threshold value, the starting point and end point of quasi-elastic stage are automatically identified, and the original data is divided into initial stage, quasi-elastic stage, plastic stage;LYH segmented function model is constructed and fitted;Initial stage uses quadratic polynomial function to adapt initial compaction nonlinear deformation;Quasi-elastic stage uses linear function to adapt the proportional relationship of elastic stage pressure-displacement;Plastic stage uses exponential decay function to adapt the pressure convergence characteristics of plastic stage;Based on fitting result, engineering core parameter is calculated and output.Compared with prior art, the present application adapts three-stage deformation mechanism of soil body, accurately calculates key pressure parameters in combination with intersection method, forms "automatic segmentation-mechanism fitting-parameter analysis" full-process automation scheme.
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