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A method for testing the moisture content of saturated soil samples

A moisture content and soil sample technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of long time, inaccurate measurement results, low efficiency, etc., and achieve the effect of simple operation, strong operability, and cost reduction

Active Publication Date: 2018-01-09
CHONGQING UNIV
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Problems solved by technology

The drying method takes too long, especially when the water content of the soil sample reaches saturation, and the efficiency is relatively low. When the soil sample is large, the inside of the soil is not easy to dry, which cannot meet the requirements for rapid on-site
The alcohol combustion method also takes a long time, and the alcohol combustion will produce moisture and be absorbed by the soil sample, making the measurement results inaccurate

Method used

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  • A method for testing the moisture content of saturated soil samples
  • A method for testing the moisture content of saturated soil samples
  • A method for testing the moisture content of saturated soil samples

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Embodiment Construction

[0023] The present invention will be described in further detail below.

[0024] see figure 1 , a method for testing the moisture content of saturated soil samples, comprising the following steps:

[0025] S1: Prepare a soil sample, weigh the soil sample, the mass of the soil sample is M, and weigh the saturated soil sample before placing it in the conductive sample chamber, and record the mass of the soil sample in its natural state, which includes the mass of the soil sample. The mass of dry soil and the mass of moisture contained in the soil sample.

[0026] S2: Measurement circuit

[0027] S2a: Make the soil sample into the same shape as the conductive sample chamber, put the soil sample into the conductive sample chamber, and then seal both ends of the conductive sample chamber; The diameter of the bottom surface of the cylindrical sample chamber is φ=75mm and the length is 120mm. In order to ensure that the soil sample completely fills the sample chamber, the size of ...

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Abstract

The invention relates to a method for testing the moisture content of saturated soil samples, which mainly includes the following steps: firstly, taking a soil sample, then encapsulating the soil sample in a conductive sample chamber, then connecting the conductive sample chamber into a circuit, and passing the ammeter and The voltmeter detects the current flowing through the conductive sample chamber and the voltage across it, and then calculates the resistance value, volume and mass of pore water in the soil sample, and finally calculates the moisture content of the saturated soil sample. This method is based on the electrical principle that water in saturated soil is connected, and current will flow when both ends are energized. Combining the conductivity of water with the volume and mass of water, the water content of saturated soil can be measured quickly and conveniently, and the operation is simple. The traditional tedious operations such as multiple weighing and drying are avoided, and the operability is strong, which can greatly reduce the cost.

Description

technical field [0001] The invention relates to the technical field of geotechnical experiments, in particular to a method for testing the moisture content of saturated soil samples. Background technique [0002] In the process of geotechnical engineering experiments, it is extremely important to measure the saturated water content of soil samples, which is the basis of subsequent experiments. Saturated soil refers to the soil filled with water in the pores. This kind of soil has a high water content, and the traditional drying method is time-consuming, and the internal moisture is not easy to dry. The difference between saturated soil and unsaturated soil is in the moisture content. The index of moisture content reflects the dryness and wetness of the soil sample. Usually, the weight of water and the weight of dry soil should be measured. [0003] Moisture content is an important index of soil samples, which directly affects the shear strength and compaction degree of soil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/00
Inventor 赵瑜陈海林何力陈宇超何鹏飞
Owner CHONGQING UNIV
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