Method and device for measuring indoor resistivity of soil sample

A measurement method and technology of internal resistance, applied in the direction of measuring devices, measuring electrical variables, measuring resistance/reactance/impedance, etc., can solve the problems of large measurement method error, high cost of measurement method, inconvenient construction, etc., to reduce the measurement error, convenient and quick measurement method, and the effect of maintaining natural characteristics

Inactive Publication Date: 2013-01-02
CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] One of the purposes of the present invention is to provide an indoor resistivity measurement method for soil samples in view of the defects of the existing marine soil measurement method, such as high cost, inconvenient construction, and large error of the existing land soil measurement method, which must be corrected for resistivity. method, realize the measurement of marine soil resistivity in an indoor way, which is economical, fast, convenient and less disturbed

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  • Method and device for measuring indoor resistivity of soil sample
  • Method and device for measuring indoor resistivity of soil sample
  • Method and device for measuring indoor resistivity of soil sample

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specific Embodiment 1

[0032] refer to figure 1 , the soil sample indoor resistivity measuring device involved in the present embodiment includes a soil sample placing device 2 and a DC resistivity measuring instrument 5, and an emitting electrode plate and a joint 3 are respectively provided on both sides of the soil sample placing device 2, and the soil sample The middle part of the placement device 2 is provided with two receiving electrodes 4; the transmitting electrode plate and the connector 3 and the receiving electrodes 4 are electrically connected to the corresponding functional ports of the DC resistivity measuring instrument 5, forming a quadrupole connection structure.

[0033] 1-seabed sample; 2-sample placement device; 3-transmitting electrode plate and connector; 4-receiving electrode; 5-DC resistivity measuring instrument; 6-fixed steel wire; 7-support sheet.

[0034] refer to figure 2 , image 3 , the size of the sample placement device 2 is: L1=15cm; L2=7cm, 9cm, 11cm; W1=7cm; W2=...

specific Embodiment 2

[0052] The characteristics of this embodiment 2 are: when the sampling cover is made of iron material, when the marine soil resistivity is tested, the seabed soil sample is taken, the caps at both ends of the sample are removed at first, and the soil sample is pushed out by a professional bulldozer; the sample is placed according to the length of the sample. The distance between the two fixed brackets of device 2 is placed on the thin plate 7 of the sample holder, and the pushed out soil sample is carefully placed on the device 2. After the electrode plate 3 is in close contact with the sample soil sample, the two ends of the steel wire 6 are placed in the reserved holes and fixed. The relative position of the two brackets; according to the length of the soil sample, determine the pole distance a of the receiving electrode, which is generally half the length of the soil sample, and extend a / 2 length from the center of the soil sample to the left and right sides, and then place t...

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Abstract

The invention relates to a method and a device for measuring indoor resistivity of a soil sample. The method is characterized by comprising the steps of 1) preparing a sample placing device (2) and a direct-current resistivity measuring instrument (5) according to measurement requirements, fixing the soil sample (1) on the sample placing device (2), and connecting the sample placing device (2) with the direct-current resistivity measuring instrument (5) by a four-electrode method; 2) starting the device and setting parameters according to operation procedures of the direct-current resistivity measuring instrument; 3) beginning to acquire and record voltage, current and resistivity values Rho 1 after parameter setting is finished; 4) re-measuring the voltage, the current and the resistivity values Rho 1 after previous measurement is finished and two receiving electrodes are swapped, and recording measured voltage, current and resistivity values Rho 2; 5) further reducing a polarization effect by using a superposition averaging method, expressing superposition averaging by an expression of resistivity Rho=(Rho 1-Rho 2) / 2, and obtaining the indoor resistivity Rho=(Rho 1-Rho 2) / 2 of the measured soil sample. The method and the device for measuring the indoor resistivity of the soil sample have the advantages of accuracy in measurement and simple measurement method, and are applicable to measuring the indoor resistivity of marine soil samples, land soil samples or manufactured sample soil.

Description

technical field [0001] The present invention relates to a soil sample indoor resistivity measurement method and device, especially for marine soil samples, and can also be used for indoor resistivity measurement of land soil or sample soil. The invention belongs to the technical field of soil analysis and equipment. Background technique [0002] The resistivity of soil samples can provide a reference for the design of the foundation. In particular, the resistivity of marine soil can also provide the necessary reference for determining the engineering mechanics and corrosion parameters of marine soil. Therefore, the resistivity of soil, especially marine soil Measurement is very important. [0003] At present, the measurement methods of marine soil resistivity can be divided into indoor and in-situ testing. Installing the marine soil resistivity measurement probe (RCPTU) on the offshore pore pressure static penetration testing in-situ test device is a commonly used method f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/08
Inventor 王艳丁金伟曾强马海毅曾亮徐正元覃建波王玉玲
Owner CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD
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