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Device and method for measuring and calculating poisson ratio of soil body

A technology of Poisson's ratio and soil, which is applied in the direction of electromagnetic measuring device, electric/magnetic solid deformation measurement, and the use of stable tension/pressure to test the strength of materials, etc., which can solve the problem that the soil is easy to crack and deform, and the measurement experiment cannot be carried out normally. , Strain gauges are easy to fall off, etc., to solve the difficult-to-measure effect

Inactive Publication Date: 2014-08-13
SHANDONG UNIV
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AI Technical Summary

Benefits of technology

This technology helps us determine how much we are doing right by comparing measurements from different types of materials like rocks or plates that change their shape when subjected to pressure changes such as water flowing through them underground. By calculating these differences between pairs of material samples it can make calculations for various purposes including estimating ground settlement levels based on factors like slope stability, land use efficiency, etc., which could be useful during construction projects.

Problems solved by technology

Technological Problem: There are technical problem addressed in previous researches about how to accurately determine the proportion between different types of materials like rubber or plaster without causing damage from cracks or distortions due to their low stiffness properties.

Method used

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  • Device and method for measuring and calculating poisson ratio of soil body
  • Device and method for measuring and calculating poisson ratio of soil body
  • Device and method for measuring and calculating poisson ratio of soil body

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Embodiment Construction

[0029] The invention is composed of a thin steel ring, a resistive displacement meter, a reference support and a press, and uses two resistive displacement meters to respectively measure the vertical deformation and the lateral deformation of the soil, thereby calculating the Poisson's ratio of the soil. The structural form is shown in the attached figure, including an upper pressing plate 1 placed on the top of the tested soil column 7, a lower pressing plate 2 placed at the bottom of the tested soil column 7, and a flexible thin steel ring 3 fitted on the outer ring of the tested soil column , the outer surface of the flexible thin steel ring 3 is bonded with a resistive displacement meter I4 for measuring the lateral deformation of the soil, and a resistive displacement meter II8 for measuring the vertical deformation of the soil is arranged at the bottom of the upper platen . The resistance displacement gauge I4 is connected with a collar; the collar is set on the referenc...

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Abstract

The invention discloses a device and a method for measuring and calculating the poisson ratio of a soil body. The device comprises an upper pressing plate, a lower pressing plate and a flexible steel ring, wherein the upper pressing plate is placed on the top of a tested soil column; the lower pressing plate is placed at the bottom of the tested soil column; the flexible steel ring sleeves the outer ring of the tested soil column; the outer side surface of the flexible steel ring is bonded with a sensor I for measuring the horizontal deformation of the soil body; the bottom of the upper pressing plate is provided with a sensor II for measuring the vertical deformation of the soil body. According to the invention, the vertical deformation and the horizontal deformation of the soil body are measured respectively by utilizing two resistance-type displacement meters, thereby calculating the poisson ratio of the soil body; the problem of difficulty in measuring the poisson ratio of the soil body can be solved; the method for measuring the poisson ratio of the soil body is more simple, feasible and accurate than a strain gauge pasting method.

Description

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Claims

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Application Information

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Owner SHANDONG UNIV
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