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Sandy soil saturation measuring method

A saturation, sandy soil technology, applied in the field of geotechnical experiments, can solve problems such as lack of saturation

Active Publication Date: 2018-10-23
INST OF ENG MECHANICS CHINA EARTHQUAKE ADMINISTRATION
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

At present, there is no relevant saturation test method for model experiments

Method used

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Embodiment Construction

[0047] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0048] figure 1 It is a structural schematic diagram of a system for vacuum saturation and saturation testing according to an embodiment of the present invention. refer to figure 1 , the vacuum saturation and saturation testing system of the present invention comprises: a vacuum saturation device 10, a constant water head device 20, a vacuum pump 30, a carbon dioxide gas delivery device 40 and a data processing unit 50, and a saturation measuring device 60 comprising a laser generator 61 ( see Figure 4 ).

[0049] As shown in the figure, the vacuum ...

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Abstract

The invention relates to a sandy soil saturation measuring method. The method comprises following steps: (1) adding a sandy soil sample with a volume of V into a sample container, and vacuumizing thesandy soil sample and a constant head device in the sample container; (2) introducing carbon dioxide into the vacuumized sandy soil sample and the constant head device; (3) repeating steps (1) and (2)for many times; (4) simultaneously vacuumizing the sandy soil sample and the constant head device; (5) carrying out constant head saturation on the sandy soil sample by using the constant head deviceuntil the surface of the sandy soil sample is submerged by water; (6) after constant head saturation, exposing the sandy soil sample to atmosphere under a normal atmospheric pressure of P1; (7) vacuumizing the sandy soil sample again until the vacuum degree reaches P2; (8) measuring the change of liquid level heights of the sample container under different pressures in the steps (6) and (7), andobtaining the volume change ([delta]V); and (9) calculating the saturation (Sr) of the sandy soil sample based on a saturation formula.

Description

technical field [0001] The invention relates to geotechnical experiment technology, in particular to a method for measuring sand saturation. Background technique [0002] When solving geological problems related to various engineering buildings, it is necessary to understand the engineering geology of rock and soil. The engineering geological properties of soil include physical, hydraulic and mechanical properties. Physical properties are some properties that indicate the physical state of soil. Some of these indicators are directly measured, such as water content, density, specific gravity, volume, etc., and some are obtained through calculation, such as saturation. Soil saturation refers to the ratio of the volume of water in the pores of the soil to the volume of the pores of the soil, which indicates the degree to which the pores are filled with water. Saturation can reflect the dryness and wetness of soil and its properties, which is of great significance in practical ...

Claims

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Application Information

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IPC IPC(8): G01N33/24
CPCG01N33/246
Inventor 陈龙伟赵志旭汪云龙陈卓识
Owner INST OF ENG MECHANICS CHINA EARTHQUAKE ADMINISTRATION
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