Method and system for dividing submarine soil strata by pore water pressure static cone penetration

A pore pressure static penetration and soil layer technology, which is applied in special data processing applications, instruments, electrical and digital data processing, etc., can solve the problems of missing index information, low correlation of soil properties, and low reliability. To achieve the effect of good intuition, improve the accuracy of the model, and improve the effect

Active Publication Date: 2019-01-15
ZHOUSHAN ELECTRIC POWER SUPPLY COMPANY OF STATE GRID ZHEJIANG ELECTRIC POWER +3
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Problems solved by technology

[0005] At present, the existing stratigraphic soil classification methods mainly rely on manual selection of features. Although there are not many CPTU indicators, there are still redundancy, and some have low correlation with soil types. Selectin

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  • Method and system for dividing submarine soil strata by pore water pressure static cone penetration
  • Method and system for dividing submarine soil strata by pore water pressure static cone penetration
  • Method and system for dividing submarine soil strata by pore water pressure static cone penetration

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Embodiment Construction

[0043] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0044] like figure 1 As shown, the pore pressure static penetrating seabed soil layer division method includes steps:

[0045] 1) Obtain the original index data, including the measured pore water pressure u2, cone tip resistance q c , side wall friction f s , friction ratio R f and the normalized cone tip resistance Q considering the influence of overlying self-weight stress and hydrostatic pore pressure t , Pore pressure ratio B q ;

[0046] 2) data processing, the mean value normalization processing is carried out to the obtained data, so that the processed data conform to the standard normal distribution;

[0047] 3) Dimensionality reduction processing, the processed data is input into the autoencoder, and the autoencoder performs dimensionality reduction on the subsea piezostatic sounding indicators put into clustering, rem...

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Abstract

The invention discloses a method and a system for dividing submarine soil layer by pore water pressure static cone penetration, which relates to the field of soil layer dividing. The current stratification method in the CPTU index selection has a greater subjectivity, stratification results are not very accurate. The invention comprises the following steps: acquiring original index data, data processing, dimension reduction processing and clustering; based on the K-means clustering method, the self-encoder is used to reduce the dimension of the submarine pore pressure cone penetration test indexes, remove the redundant features, optimize the weights of the features, and cluster the subsets of the features by K-means. It is found that the outline coefficients and other clustering evaluationindexes of the cluster stratification results are greatly improved. The technical scheme utilizes a self-encoder combined with K-means clustering, the accuracy of the interface of the seabed soil layer is high, and the number of soil types, and the result display can be intuitively displayed.

Description

technical field [0001] The invention relates to the field of soil layer division, in particular to a method and system for subsea soil layer division by pore pressure static penetration penetration. Background technique [0002] Due to its rapidity, convenient operation, continuous data, complete functions, and good scalability, the pore pressure static penetration test has gained more and more attention in land and marine engineering geological surveys and geotechnical engineering surveys in recent years. Its data indicators have gradually become an important basis for the evaluation of marine engineering geological conditions and geological hazards. Whether it is engineering geological survey or geotechnical engineering survey, the correct division of strata and identification of soil types are the most basic and important content, which affects the quality of follow-up work. [0003] Compared with the method of drilling combined with laboratory tests, piezostatic penetra...

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Application Information

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IPC IPC(8): G06F17/50G06K9/62
CPCG06F30/20G06F18/23
Inventor 宣耀伟何旭涛丁兆冈彭维龙李世强胡文侃马兴端沈耀军张志刚舒琪
Owner ZHOUSHAN ELECTRIC POWER SUPPLY COMPANY OF STATE GRID ZHEJIANG ELECTRIC POWER
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