Soil particle size detection method and system based on geotechnical screening test and medium

A screening test and detection method technology, which is applied in the direction of measuring devices, particle size analysis, and analytical materials, can solve problems such as uneven distribution of spacing, nonlinear relationship of data, and deviation of estimated values, so as to improve efficiency and accuracy, The effect of improving detection accuracy

Pending Publication Date: 2020-12-11
CHINA RAILWAY 12TH BUREAU GRP +1
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Problems solved by technology

[0036] In summary, even if the sieving curve drawing in the project has taken into account the extremely uneven distribution of adjacent known coordinate points and the non-linear relationship of data, and uses semi-logarithmic coordinates to significantly reflect the trend of the curve, However, if linear interpolation is still used when estimating the characteristic particle size, the estimated value will have a large deviation

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  • Soil particle size detection method and system based on geotechnical screening test and medium
  • Soil particle size detection method and system based on geotechnical screening test and medium
  • Soil particle size detection method and system based on geotechnical screening test and medium

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Embodiment 1

[0079] Such as Figure 7 As shown, the implementation steps of the soil particle size detection method based on the geotechnical sieving test in this embodiment include:

[0080] 1) Input the target particle size d and the soil sample with the aperture d 1 ~ d n The mass percentage of the particle size obtained by sieving through the sieve m 1 ~ m n ;

[0081] 2) For the obtained particle size mass percentage m 1 ~ m n Any intermediate data point m in i , according to the intermediate data point m i The two adjacent data points are calculated using the specified interpolation method to obtain the interpolated data point m i ˊ, calculate the intermediate data point m i and its corresponding interpolation data point m i ˊThe deviation between Δm i , according to all intermediate data points m i Deviation Δm i Calculate the average relative deviation, sample standard deviation, and coefficient of variation, and calculate the deviation coefficient of the specified int...

Embodiment 2

[0135] Embodiment 1 actually selects the method of using the calculated interpolation results and deviation coefficients of multiple interpolation methods, and can also automatically select an optimal interpolation method according to the deviation coefficients of the interpolation methods and output the interpolation results. In this embodiment, an optimal interpolation method is automatically selected according to the deviation coefficient of the interpolation method and an interpolation result is output.

[0136] The implementation steps of the soil particle size detection method based on the geotechnical sieving test in this embodiment include:

[0137] S1) Input the target particle size d and the soil sample with the aperture d 1 ~ d n The mass percentage of the particle size obtained by sieving through the sieve m 1 ~ m n ;

[0138] S2) For each current interpolation method in the preset multiple interpolation methods: for the obtained particle size mass percentage m...

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Abstract

The invention discloses a soil particle size detection method and system based on a geotechnical screening test and a medium. The soil particle size detection method comprises the following steps: inputting a target particle size d and particle size mass percentages m1-mn obtained by screening and detecting a soil sample by using a screen with the pore diameter of d1-dn respectively; calculating adeviation coefficient of a specified interpolation method; obtaining corresponding particle size mass percentages mj-1 and mj+1, and performing interpolation calculation on the particle size mass percentages mj-1 and mj+1 by adopting a specified interpolation method to obtain a particle size mass percentage mj of the target particle size d; and outputting the deviation coefficient and the particle size mass percentage mj of the specified interpolation method. According to the device and the method, the curvature coefficient, the non-uniformity coefficient and other characteristic parameters of the characteristic particle size d of a certain specific value m can be accurately measured under the condition that the aperture of the screen is fixed and discontinuous in the geotechnical screening test process, and the soil particle size detection precision of the geotechnical screening test can be effectively improved.

Description

technical field [0001] The invention relates to soil particle size detection technology, in particular to a soil particle size detection method, system and medium based on a geotechnical sieving test. Background technique [0002] When evaluating gradation characteristics in geotechnical tests, it is necessary to know the characteristic particle size d (P<m) whose mass percentage P is less than a certain value m to calculate the coefficient of curvature, coefficient of inhomogeneity and other parameters. However, during the test, the sieve aperture is fixed and discontinuous, so it is impossible to directly measure d(P<m). In order to solve the above problems, engineering generally adopts the indirect method of measuring d i (P<m i ) and d i+1 (P<m i+1 ) method of "interpolation", where d i and d i+1 Respectively correspond to the standard sieve diameter, and choose m reasonably i and m i+1 , so that m∈(m i ,m i+1 ), linearly interpolate m (m i , d i ...

Claims

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Application Information

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IPC IPC(8): G01N15/02G06F17/10
CPCG01N15/0272G06F17/10
Inventor 曾慧平沈捍明王松高明夏寄鹏曾伟
Owner CHINA RAILWAY 12TH BUREAU GRP
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