A Method for Measuring the Distribution and Depth of Cracks in Soil
A technology of fissure distribution and depth, which is used in the field of determining the distribution and depth of fissures in soil by measuring apparent conductivity of soil, and measuring the distribution and depth of fissures in soil. It can solve complex operations, damage to soil structure, soil disturbance, etc. problems, to achieve the effect of small soil disturbance, flexible application, and simplified data processing procedures
Inactive Publication Date: 2017-12-19
HOHAI UNIV
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Problems solved by technology
[0003] Existing methods for measuring soil cracks are often complicated to operate, and usually have a large disturbance to the soil. The measurement activity itself destroys the soil structure. How to find a method that is simple to operate and disturbs the soil as little as possible? Measuring the distribution of cracks inside the soil has always been a matter of concern in the field of geotechnical engineering
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[0045] The present invention will be further described below in conjunction with the accompanying drawings.
[0046] Such as Figure 1 to Figure 5 As shown, a method for measuring crack distribution and depth in soil is characterized in that it mainly includes the following steps:
[0047] 1. Insert the electrodes in the homogeneous soil to be tested according to the circular and triangular electrode layout and appropriate spacing, and select the electrode layout position appropriately so that there is no gap between at least two electrodes (basic electrode pairs);
[0048] 2. Measure the apparent conductivity between the electrodes according to the electrode layout. For a circular layout, measure the apparent conductivity between the center electrode and each electrode on the circumference. For a triangular layout, measure the apparent conductivity between any adjacent electrodes;
[0049] 3. Among the measured apparent conductivities, the two electrodes with the largest val...
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The invention discloses a method for measuring the distribution and depth of cracks in soil. The method is characterized in that the distribution of current density in a soil body is changed along the depth according to a double-curve rule; when cracks with a certain depth range in the soil body develop, the electric conductivity is changed and a specific value between the electric conductivity and an observation value of a base electrode pair abides by a double-curve relation; and the crack distribution and development depth of the soil body in a region to be detected can be calculated according to the rule. Compared with the prior art, the method is relatively flexible to apply, and an electrode arrangement manner and an electrode distance can be adjusted according to characteristics of the region to be detected; and the method has small disturbance on the soil body, and the crack distribution and development depth of the soil body can be relatively accurately measured.
Description
technical field [0001] The invention relates to a method for measuring the distribution and depth of cracks in the soil, in particular to a method for determining the distribution and depth of cracks inside the soil by measuring the apparent electrical conductivity of the soil. This method will not destroy the soil structure and disturb the soil. The utility model has the advantages of small size and accurate measurement result; it belongs to the technical field of geotechnical engineering soil monitoring and testing. Background technique [0002] Soil cracking is often encountered in geotechnical engineering. There are many reasons for cracks, which can be roughly divided into three categories: natural internal stress, natural external stress and human activities. Natural internal stress mainly refers to the tectonic movement of the earth's crust. Natural external stress is mainly caused by rain, snow, temperature, surface water and other natural environmental factors, such...
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IPC IPC(8): G01N27/04
CPCG01N27/041
Inventor 袁俊平韩春雷丛茂建王强林丁国权卢艳平
Owner HOHAI UNIV