Method for producing salinized undisturbed soil sample having unsaturated structure

An undisturbed soil sample and structural technology, applied in the preparation of test samples, etc., can solve the problems of high transportation costs, large gap between saline soil sample structure and undisturbed soil, etc., and achieve simple production process, low cost, cost reduction effect

Inactive Publication Date: 2017-11-24
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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Problems solved by technology

[0003] The purpose of the present invention is to provide a sample preparation method of unsaturated structural saline undisturbed soil samples to solve the problem that the structure of saline soil samples in the prior art is too different from undisturbed soil, and the problem of direct acquisition and transportation costs is large

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  • Method for producing salinized undisturbed soil sample having unsaturated structure
  • Method for producing salinized undisturbed soil sample having unsaturated structure
  • Method for producing salinized undisturbed soil sample having unsaturated structure

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Embodiment Construction

[0025] The present invention will be described in detail below with reference to the drawings and implementation of the specification.

[0026] see Figure 1 to Figure 3 , a method for preparing unsaturated structural saline undisturbed soil samples, comprising the following steps:

[0027] Step 1: making a cylindrical structural undisturbed soil sample;

[0028] Step 2: Make a uniform film with holes, the width of which is not less than 1.5 times the height of the undisturbed soil sample, and completely wrap the film on the side of the cylindrical structural undisturbed soil sample;

[0029] Step 3: Cut the medium-density sponge, whose width should not be less than twice the height of the original soil sample, and whose length is equal to the perimeter of the original soil sample, and wrapped on the outside of the uniform film with holes;

[0030] Step 4: Wrap the perforated film with a medium-density sponge soaked in salt water, and wrap a film on the outside of the sponge...

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Abstract

The invention relates to a method for producing a salinized undisturbed soil sample having an unsaturated structure. The method comprises the following steps: the undisturbed soil sample having cylindrical constitutive property is produced, artificial production of a uniform foraminous film is carried out, the side surface of the undisturbed soil sample having the cylindrical constitutive property is coated with the film, the length of the undisturbed soil sample which exceeds two sides of the film can be kept to a similar state; a medium-density sponge shape is cut by hands, two ends of the sponge are cut into triangles which are mutually jointed, then the outside of the uniform foraminous film is coated with the sponge, during a sample preparing process, the foraminous film is coated with the medium-density sponge immersed with brine, and the outside of the sponge is coated with a layer of thin film for fixing the position of the sponge; after standing for a while, the brine is uniformly filtered into the undisturbed soil sample; simple air drying or water addition is carried out at anaphase to a set water content, the film is used for coating for standby, and the salt-containing undisturbed soil is completely produced. The method can guarantee uniform infiltration of salinity, can keep the disturbance of the undisturbed soil sample to a lowest state, and can solve the acquisition problem of the salinized soil.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering geotechnical tests, in particular to a sample preparation method for unsaturated structural saline undisturbed soil samples. Background technique [0002] There is no relevant description in the existing literature on the use of structural undisturbed soil to make saline soil. The general method for making saline soil in the laboratory is to mix loose soil with brine, and then press the saline-soil mixture into a sample with a sample press. Saline soil sample preparation method can obtain saline soil samples, but compared with undisturbed soil, its structural gap is too large. There is also a more direct method to sample from remote areas such as Xinjiang, Inner Mongolia, and Northeast China, which are rich in saline soil. This method can obtain the most ideal saline soil samples. However, due to the remote distribution of saline soil, it is generally difficult to sample. And shi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28
CPCG01N1/28
Inventor 许健冯灿程东幸
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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