Pressure plate instrument for rapidly measuring soil water characteristic curve, and measuring method thereof

A soil-water characteristic curve and fast technology, applied in the field of pressure plate instrument, can solve the problems of long measurement time and large measurement error, and achieve the effect of high permeability, improvement time and shortening time.

Active Publication Date: 2019-09-03
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

[0009] The purpose of the present invention is to provide a pressure plate meter and its measuring method for quickly measuring soil-water characteristic curves, so as to solve the problems of long measurement time and large measurement errors in measuring soil-water characteristic curves

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  • Pressure plate instrument for rapidly measuring soil water characteristic curve, and measuring method thereof
  • Pressure plate instrument for rapidly measuring soil water characteristic curve, and measuring method thereof
  • Pressure plate instrument for rapidly measuring soil water characteristic curve, and measuring method thereof

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Embodiment Construction

[0054] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0055] Pressure plate meter for rapid measurement of soil-water characteristic curves, such as figure 1 As shown, the laser emitter inside the laser displacement sensor 38 emits a beam of laser light to generate a laser spot on the surface of the measured object, the difference ΔX between the imaging position of the light spot inside the laser displacement sensor and the reference position and the distance between the object and the reference △L has a certain ...

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Abstract

The invention discloses a pressure plate instrument for rapidly measuring a soil water characteristic curve, and a measuring method thereof. The pressure plate instrument is composed of a pressure chamber system, a pressure control system, a vertical pneumatic loading system, a time domain reflection measuring system and a plurality of water storage systems; one air outlet of the pressure controlsystem is connected with an air inlet of the pressure chamber system, and another air outlet is connected with the air inlet of the vertical pneumatic loading system to control the air pressure of thepressure chamber system and the vertical pneumatic loading system; a vertical loading end of the vertical pneumatic loading system vertically acts on the pressure chamber system to control the waterabsorption or dehydration of a soil sample; a detection end of the time domain reflection measuring system is connected with the pressure chamber system to measure the moisture content of the soil sample; and the water storage system is connected with a water outlet end of the pressure chamber system to store moisture removed from the soil sample. The pressure chamber system comprises a flushing groove base, an upper base, a top cover, a screw, a stainless steel sample chamber and a plurality of soil sample loading modules. The problems that the measurement time of the soil water characteristic curve is long and the measurement error is large are solved.

Description

technical field [0001] The invention belongs to the technical field of high-end equipment manufacturing, and in particular relates to a pressure plate meter for quickly measuring soil-water characteristic curves for estimating the strength and permeability coefficient of rail transit subgrade soil and a measuring method thereof. Background technique [0002] The soil-water characteristic curve refers to the relationship curve between the soil matric suction and the soil moisture content, saturation or volumetric moisture content. The soil-water characteristic curve is an important part of the constitutive model of unsaturated soil, which can be used to estimate the strength and permeability coefficient of rail transit subgrade soil, and is also a key parameter and basic test content in unsaturated soil mechanics. However, there are shortcomings in the current testing technology such as long experimental time, low automation level, inaccurate data collection, and difficult ju...

Claims

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Application Information

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IPC IPC(8): G01N23/00
CPCG01N23/00G01N2223/616
Inventor 张军辉张银银彭俊辉
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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