Anisotropy measurement device and measurement method of hydraulic characteristic of unsaturated soil body

A technology of hydraulic properties and anisotropy, which is applied in the field of anisotropy measuring devices for hydraulic properties of unsaturated soil, which can solve the problems of sampling soil disturbance, complex sampling, and inability to measure unsaturated soil water and soil characteristic curves and permeability coefficients, etc. , to shorten the test time
CN103822845AActive Publication Date: 2014-05-28HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
Publication Date
2014-05-28

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Abstract

The invention provides an anisotropy measurement device of the hydraulic characteristic of an unsaturated soil body. The anisotropy measurement device comprises a weighing device, a soil sample container and soil water potential measurement instruments, wherein the soil sample container is placed on the weighing device; soil water potential measurement instrument mounting holes are formed in the soil sample container; the soil water potential measurement instruments are mounted in the soil water potential measurement instrument mounting holes; the soil sample container is provided with a top sealing plate and a lateral sealing plate; the top sealing plate and the lateral sealing plate are used for opening or closing the soil sample container. According to the invention, a soil-water characteristic curve and an unsaturated permeability coefficient of the same soil sample measurement soil body are determined by measuring suction force in different positions and the flow of an evaporation surface; an unsaturated hydraulic characteristic parameter is measured via a simple evaporation method, so that the test time is shortened; unsaturated hydraulic characteristic parameters in vertical and horizontal directions of the soil body can be measured respectively by changing a direction of the evaporation surface. The invention further discloses a measurement method.
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Description

technical field

[0001] The invention relates to a measuring device and a measuring method for the anisotropy of hydraulic properties of unsaturated soil. Background technique

[0002] The granular structure characteristics of soil determine the generation of soil anisotropy, especially in layered compacted soil. In layered compacted soil, the mesoscopic structure of the soil is layered, resulting in extremely serious anisotropy of unsaturated hydraulic parameters. The unsaturated hydraulic characteristic parameters include the soil-water characteristic curve and the unsaturated permeability coefficient of the soil. The difference in the unsaturated hydraulic characteristic parameters in the vertical and horizontal directions of the soil is one of the main reasons for the inaccurate prediction of seepage in the unsaturated soil. This problem generally exists in agriculture, forestry, soil science, civil engineering and other disciplines. Especially in civil engineering, un...

Claims

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