Landslide layered moisture content measuring instrument and test method thereof

Abstract

The invention discloses a landslide layered moisture content measuring instrument and a test method thereof. A landslide layered water content calibration test method comprises a waterproof outer pipeand an FDR (frequency domain reflection) type tubular rock-soil layered water content measuring probe pipe, wherein the FDR type tubular rock-soil layered water content measuring probe pipe is arranged in the waterproof outer pipe; wherein the FDR type tubular rock-soil layered moisture content measuring probe is arranged in the waterproof outer pipe. The FDR type tubular rock-soil layered moisture content measuring instrument is resistant to high temperature and high pressure and high in precision, layered measuring of the moisture content, salinity and temperature of a rock-soil layer in awell can be achieved under the high-temperature environment condition of 0-80 DEG C, and the FDR type tubular rock-soil layered moisture content measuring instrument is not affected by interference ofthe temperature and salinity of the rock-soil layer.

Description

technical field [0001] The invention relates to the field of landslide geological disasters, in particular to a landslide stratified water content monitor and a testing method thereof. Background technique [0002] Changes in the water content of rock and soil layers are one of the most important factors that induce landslides and debris flow geological disasters. The measurement principles used in the past, such as electrical resistance method, neutron method and γ-ray method, optical measurement method and sonar method, have different accuracy. Not high, harmful to the human body or greatly affected by the weather, and expensive electronic circuits. As far as the current research situation is concerned, capacitive and TDR moisture sensors are used for monitoring, but due to the characteristics of rock and soil temperature, salinity, etc. Different, resulting in low moisture content measurement sensitivity, large errors, and even data distortion. The reason for the large e...

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Problems solved by technology

[0002] Changes in the water content of rock and soil layers are one of the most important factors that induce landslides and debris flow geological disasters. The measurement principles used in the past, such as electrical resistance method, neutron method and γ-ray method, optical measurement method and sonar method, have different accuracy. Not high, harmful to the human body or greatly affected by the weather, and expensive electronic circuits. As far as the current research situation is concerned, capacitive and TDR moisture sensors are used for monitoring, but due to the characteristics of rock and soil temperature, salinity, etc. different, resulting in low moisture content measurement sensitivity, large errors, and even data distortion

The reason for the large error is that the existing method does not consider the salinity in the measurement of moisture content, which makes the range of applied soil layers small, and each application of different soil layers needs to be calibrated by the manufacturer.

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