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Upward osmosis TDR coaxial test cylinder calibration device and calibration method

A calibration device and test cylinder technology, applied in the direction of material impedance, etc., can solve the problems of difficult penetration of probes and high medium density, and achieve the effects of time-consuming and labor-intensive, good applicability, and simple structure

Pending Publication Date: 2017-06-16
ZHEJIANG UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when used in geotechnical engineering, especially in the compacted soil-rock mixture medium, there is a problem that the medium density is high and the probe is difficult to penetrate.

Method used

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  • Upward osmosis TDR coaxial test cylinder calibration device and calibration method
  • Upward osmosis TDR coaxial test cylinder calibration device and calibration method
  • Upward osmosis TDR coaxial test cylinder calibration device and calibration method

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0024] Such as Figure 1-4 As shown, a kind of upward infiltration method TDR coaxial test tube calibration device provided by the present invention comprises a coaxial test tube 9, a permeable base 4, an electronic scale 5, a permeable stone 6, a Martens bottle 1, a probe 10, Coaxial converter 11 and TDR100 transmitter 13; the upper surface of the permeable base 4 is provided with a circular groove for placing the permeable stone 6, and the bottom of the circular groove is provided with several concentric annular grooves; the bottom of the permeable base 4 There is an opening, which is connected to the Martens bottle 1 through the water pipe 2. The water pipe 2 is provided with a water-stop clip 3 for controlling the water inflow and outflow of the device; an annular gasket 7 is placed on the permeable stone 6 to prevent the device from leakin...

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Abstract

The invention discloses an upward osmosis TDR (time domain reflectometry) coaxial test cylinder calibration device and a calibration method. The device comprises a coaxial test cylinder, an osmosis pedestal, an electronic scale, a permeable stone, a Mariotte bottle, a probe, a coaxial converter and a TDR100 emitter. The coaxial test cylinder and the osmosis pedestal are fixed through a bolt, the coaxial test cylinder is connected to a TDR test system, and the osmosis pedestal is connected to the Mariotte bottle through a water pipe. A rock and soil sample is subjected to layered filling and compaction in the coaxial test cylinder, water is supplied through the Mariotte bottle, a sample water content can be obtained through change of the electronic scale mass, and a sample dielectric constant can be obtained through a TDR test system. By combining the coaxial test cylinder with an osmosis device, the device and the method provided by the invention overcome the time-consuming and labor-consuming characteristics of the traditional calibration method, and realize TDR rapid calibration of compacted rock-soil mass.

Description

technical field [0001] The invention relates to the field of geotechnical engineering, in particular to a calibration device and a calibration method for a TDR coaxial test cylinder of an upward penetration method. Background technique [0002] Electromagnetic wave time domain reflectometry (time domain reflectometry, TDR) utilizes the characteristic that the dielectric constant of water is much larger than that of rock and soil solid particles and air, and determines the water content of rock and soil by testing the electromagnetic parameters of rock and soil, which has the advantages of fast speed, It has the advantages of high precision and automatic continuous monitoring. [0003] In geotechnical engineering, the traditional calibration method is usually to prepare a group of samples with different water content gradients, and after TDR testing, the calibration parameters are obtained by parameter fitting. In the traditional method, one sample only corresponds to one te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/02
CPCG01N27/02
Inventor 赵云凌道盛黄博
Owner ZHEJIANG UNIV
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