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Radial seepage instrument and operation method thereof

An operation method and flow meter technology, applied in the field of radial seepage meter, can solve the problems of inconvenient discharge of soil sample gas, uneven soil sample state, affecting test accuracy, etc.

Pending Publication Date: 2019-08-02
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent search found that the application number is 201720773880.5, and the name is "a radial seepage experimental device for evaluating the radial seepage characteristics of soil". The gas in the sample; the water outlet is at the bottom, and the water seeping out of the soil sample may flow out quickly, making the upper and outer sides of the soil sample in an unsaturated state, resulting in an uneven state in the soil sample, which is different from the one to be simulated in the test. Affect the test accuracy

Method used

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  • Radial seepage instrument and operation method thereof
  • Radial seepage instrument and operation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0044] The schematic diagram of the main structure of this embodiment is shown in figure 1, for a complete structural schematic see figure 2 , Figure 3 to Figure 8 A schematic diagram of the main components. The main structure of the radial seepage meter mainly includes a water permeable cylinder 4, an outer sleeve 3, an upper cover 1a, a lower cover 1, and a water permeable rod 8; the soil sample 5 suitable for the radial seepage meter is circular and columnar, with a height of 40.0mm , the outer diameter is 61.8mm, the inner diameter is 6.18mm, and a permeable rod 8 is inserted in the central hole; The height of the permeable cylinder 4 is 42.0mm, the outer diameter is 74.8mm, and the inner diameter is 62.2mm; the height of the outer sleeve 3 is 42.0mm, the outer diameter is 81.8mm, and the thickness is 3.4mm. The upper gasket 9a and the lower gasket 9 are made of soft rubber, both of which are ring-shaped, with an inner diameter of 5.8mm, an outer diameter of 61.8mm, a...

Embodiment 2

[0055] The difference between this embodiment and Embodiment 1 is that the outer sleeve 3 and the water-permeable cylinder 4 are combined into a combination, see Figure 9 . The combination is achieved by applying 10.0 mm wide structural glue to both ends of the inner surface of the outer sleeve 3, bonding the outer sleeve 3 and the permeable sleeve 4 into one body, and the two ends are flush. Correspondingly, the experimental operation method is basically the same as that of Example 1, except that the second step is changed to:

[0056] Step 2-2: Place the filter paper inside the combination of the outer sleeve 3 and the water-permeable tube 4, push the soil sample 5 in, place the combination and the soil sample 5 on the lower cover 1, and open the hole in the center of the soil sample 5 Place the filter paper inside, and place the upper gasket 9a in the center.

Embodiment 3

[0058] The difference between this embodiment and embodiment 1 is that the outer sleeve 3 and the lower cover 1 are integrally manufactured, and the schematic diagram of the assembly is shown in Figure 10 . This saves the making of the sealing ring groove 11 in the lower cover 1, and saves the lower sealing ring 6, which facilitates the operation. Correspondingly, the experimental operation method is basically the same as in Example 1, except that the first two steps are changed to:

[0059] Step 3-1: Adjust the feet 16 of the lower cover 1 so that the lower cover 1 is in a horizontal state; place the lower gasket 9 in the center;

[0060] Step 3-2: Place the filter paper inside the permeable cylinder 4, push the soil sample 5 into the permeable cylinder 4, put them into the outer sleeve 3 together, place the filter paper in the hole in the center of the soil sample 5, and place the upper gasket 9a in the center .

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Abstract

The invention, which belongs to the field of geotechnical experiments, discloses a radial seepage instrument and an operation method thereof, thereby realizing the radial seepage experiment from the center to the periphery as well as the radial seepage experiment from the periphery to the center and realizing conversion between the two kinds of radial seepage experiments. The radial seepage instrument mainly includes a lower cover, an upper cover, an outer sleeve, a water-permeable cylinder and a water-permeable rod. A soil sample is in a circular ring shape. The water-permeable rod is inserted into the hole and is connected with the upper cover and the lower cover. Two main water paths flowing through the center hole and the periphery of the soil sample respectively are arranged in the radial seepage instrument to control water entrance and exit of the water paths; and thus water on one water path penetrates into the other water path along different radial directions of the soil sample to be discharged to a water volume measuring container. Therefore, internal gas can be exhausted as soon as possible conveniently at the early stage of the experiment; an effect of integration of one camera with two purposes is realized; and the structure is simple and resources and time are saved.

Description

technical field [0001] The invention relates to the field of geotechnical experiments, in particular to a radial seepage meter and an operating method thereof. Background technique [0002] The permeability of soil is one of the basic engineering characteristics of soil, one of the indicators that must be measured in geotechnical test research, and the basis for analyzing the seepage calculation of dams and groundwater seepage. There are three ways of penetration of soil samples: vertical, transverse and radial. The one-dimensional vertical and horizontal permeability test methods and equipment are relatively mature, but the current experiments for the measurement of soil permeability and radial permeability coefficient under radial seepage conditions are not mature, and there is no more targeted experimental method and experimental equipment. The patent search found that the application number is 201720773880.5, and the name is "a radial seepage experimental device for ev...

Claims

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Application Information

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IPC IPC(8): G01N15/08
CPCG01N15/0826Y02A20/00
Inventor 魏建东刘忠玉
Owner ZHENGZHOU UNIV
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