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Method of Stratification of Soft Soil According to Mechanical Properties

A technology of mechanical properties and soft soil, applied in the field of soft soil layering according to mechanical properties, can solve the problem of no soft soil layering, etc., and achieve the effect of strong operability

Active Publication Date: 2017-10-31
CECEP WIND POWER
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is currently no method for stratifying soft soils based on their mechanical properties

Method used

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  • Method of Stratification of Soft Soil According to Mechanical Properties
  • Method of Stratification of Soft Soil According to Mechanical Properties

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Embodiment Construction

[0050] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0051] The present invention proposes a method for layering soft soil according to mechanical properties, which comprises the following steps:

[0052] 1) Use cross-plate shear test equipment to conduct cross-plate shear tests at different depths of soft soil, and record the maximum reading R of the dial indicator when the original soil layer is sheared at different depth test points of soft soil y , and the maximum reading R of the dial indicator when the probe rod 2 of the cross-plate shear test equipment rubs against the soil g value.

[0053] The specific steps for conducting the cross-plate shear test at different depths in soft soil are as follows:

[0054] ①Use a rotary drill to drill a hole from the ground surface to the test point, and then lower the sleeve to a position 3 to 5 times the diameter of the sleeve below the test point. During t...

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Abstract

The invention relates to a method for layering soft soil according to mechanical properties, which comprises the following steps: 1) performing a cross-plate shear test at different depths of the soft soil, and recording the percentage of shear loss of the original soil layer at the test points of the different depths of the soft soil The maximum reading Ry of the table, and the maximum reading Rg of the dial indicator when the probe rod is in contact with the soil; 2) Calculate the resistance F of the soil at different depths of soft soil; 3) Calculate the constant K of the cross plate; 4) Calculate the difference in soft soil The mechanical characteristic value Y of the soil at the depth test point, and draw the Y-h relationship scatter diagram; 5) Eliminate the outliers in the Y-h relationship scatter diagram; 6) According to the characteristic equation of mechanical properties, the Y-h relationship scatter diagram The remaining test points in the point diagram are linearly fitted, and the correlation analysis is carried out point by point, and at least one straight line with the highest correlation coefficient distributed at different depths and its mechanical property characteristic equation are solved. 7) Solve the physical and mechanical property parameters of each soil layer separately.

Description

technical field [0001] The invention relates to a method for layering soft soil in geotechnical engineering investigation and design, in particular to a method for layering soft soil according to mechanical properties by using a cross plate shear test. Background technique [0002] Soft soil usually refers to fine-grained soil with a void ratio greater than or equal to 1 and a natural water content greater than the liquid limit. It is classified according to the physical and chemical properties (such as void ratio, water content, organic matter, etc.) of different soft soils. Such soil includes silt, Silt soil, peat and peat soil, etc. [0003] This method of classification according to the physical and chemical properties of soft soil has good operability and is easy to popularize. However, the physical properties of soft soil after classification do not have strict correspondence with their mechanical properties. For example, the void ratios of two adjacent soil layers ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/24
Inventor 张长存
Owner CECEP WIND POWER
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