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Method and device for testing and analyzing dynamic shear modulus of marine soil

A shear modulus, test and analysis technology, applied in the field of marine geotechnical engineering, can solve problems affecting the properties of soil samples, dynamic shear modulus test errors, and reduce the accuracy of analysis and calculation, etc.

Active Publication Date: 2020-01-10
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the sampling, transportation, storage and test process will cause disturbance of the soil sample, so that the obtained dynamic shear modulus is different from the actual one. The disturbance of the soil sample will affect the properties of the soil sample, resulting in the error of the dynamic shear modulus. Thereby reducing the accuracy of subsequent analysis and calculation

Method used

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  • Method and device for testing and analyzing dynamic shear modulus of marine soil
  • Method and device for testing and analyzing dynamic shear modulus of marine soil
  • Method and device for testing and analyzing dynamic shear modulus of marine soil

Examples

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Embodiment 1

[0060] Such as figure 1 As shown, the present embodiment provides a method for testing and analyzing the dynamic shear modulus of marine soil, which includes:

[0061] Step S101: using a cross-plate shearer to sample marine soil on-site, and recording in real time the measured torque T and rotation angle θ of the cross-plate shearer for each sampling;

[0062] Step S102: Obtain the dynamic shear modulus of the marine soil based on the measured torque T and rotation angle θ of the cross-plate shearer.

[0063] In the specific implementation process, step S101 belongs to the "experimental testing process", specifically including steps S10 to S20.

[0064] Step S10: Gently insert the cross-plate shearer into the undisturbed soil sample, cut the soil sample at a constant angular velocity ω, the angular velocity ω must be controlled below 0.1rad / s, the shearing angle is greater than 2rad, and the torque T and rotation angle are recorded in real time theta.

[0065] In the specific...

Embodiment 2

[0096] Based on the same inventive idea, such as Figure 5 As shown, the present embodiment provides a marine soil dynamic shear modulus test and analysis device 200, including:

[0097] The control unit 201 is used to control the cross-plate shearer to perform on-site sampling of marine soil, and record in real time the measured torque T and rotation angle θ of the cross-plate shearer for each sampling;

[0098] The calculation unit 202 is configured to obtain the dynamic shear modulus of the marine soil based on the measured torque T and rotation angle θ of the cross-plate shearer.

[0099] As an optional embodiment, the control unit 201 is specifically configured to:

[0100] Controlling the cross-plate shearing instrument to insert into the undisturbed soil sample of the marine soil, controlling the cross-plate shearing instrument to shear the undisturbed soil sample, and recording the measured torque T and rotation angle θ in real time.

[0101] As an optional embodimen...

Embodiment 3

[0130] Based on the same inventive idea, such as Image 6 As shown, the present embodiment provides a computer-readable storage medium 400, on which a computer program 411 is stored, and when the computer program 411 is executed by a processor, the following steps are implemented:

[0131] Control the cross-plate shearer to sample the marine soil on-site, and record in real time the measured torque T and rotation angle θ of the cross-plate shearer during each sampling; based on the measured torque T and rotation angle θ of the cross-plate shearer Angle θ, to obtain the dynamic shear modulus of the marine soil.

[0132] In a specific implementation process, when the computer program 411 is executed by a processor, any step in Embodiment 1 (or Embodiment 2) can be implemented.

[0133] Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, systems, or computer program products. Accordingly, the present invention can...

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Abstract

The invention discloses a method for testing and analyzing dynamic shear modulus of marine soil, and the method comprises the following steps of using a cross plate shear meter to sample marine soil on site, real-time recording the measured torque T and rotation angle theta of the cross plate shear meter in each sampling, and obtaining the dynamic shear modulus of the marine soil based on the measured torque T and rotation angle theta of the cross plate shear meter. The invention can complete the test and analysis of the dynamic shear modulus of marine soil, reduce the test error caused by sample disturbance, and further improve the accuracy of the dynamic shear modulus. At the same time, the invention also discloses a device for testing and analyzing dynamic shear modulus of marine soil and a computer readable storage medium.

Description

technical field [0001] The invention relates to the field of marine geotechnical engineering, in particular to a method and device for testing and analyzing the dynamic shear modulus of marine soil. Background technique [0002] Dynamic shear modulus is often used as a dynamic parameter to evaluate the dynamic characteristics of soft soil. The traditional dynamic shear modulus test method is to test it by using dynamic triaxial, resonance column and other geotechnical tests after sampling in ocean drilling. [0003] Because the traditional shear modulus test is obtained by performing dynamic triaxial and resonant column tests in the laboratory after sampling. Because the sampling, transportation, storage and test process will cause disturbance of the soil sample, so that the obtained dynamic shear modulus is different from the actual one. The disturbance of the soil sample will affect the properties of the soil sample, resulting in the error of the dynamic shear modulus. T...

Claims

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Application Information

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IPC IPC(8): G01N3/24
CPCG01N3/24G01N2203/0003G01N2203/0025G01N2203/0202G01N2203/0682G01N2203/0676
Inventor 祁磊邓海峰许浩李春曹先凡赵开龙徐爽姚志广
Owner BC P INC CHINA NAT PETROLEUM CORP
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