Geomembrane bloating deformation mechanical test device with electronic ruler for measuring distance

Abstract

A test device, which is used for measuring geomembrane bloating deformation mechanical properties for film mulch seepage proofing in the fields of water conservancy plain reservoirs, municipal refuse landfill fields and the like, is disclosed. The test device allows a geomembrane bloating deformation mechanical property test and can be used for testing air pressure in a container and burst pressure of a geomembrane, wherein the top height of geomembrane bloating deformation can be automatically measured through an electronic ruler (such as a capacitive grating or an optical grating), and further a stress-strain relationship curve of the geomembrane bloating deformation can be obtained. The geomembrane bloating deformation mechanical test device is composed of three parts: an bloating deformation apparatus, a pressurizing apparatus and a test and control system, wherein the bloating deformation apparatus includes a container under the membrane and a constraint flange above the membrane and is characterized in that a geomembrane sample is arranged between the container under the membrane and the constraint flange above the membrane, wherein the geomembrane is constrained by the flange annularly. The pressurizing apparatus is used for supplying compressed air source with a pneumatic pump and can be regulated. The test and control system is mainly used for measuring the air pressure in the container under the membrane by means of an air pressure meter and automatically measuring the top height of the geomembrane bloating deformation with the electronic ruler (such as the capacitive grating or the optical grating).

Description

technical field [0001] The patent of the present invention relates to a test equipment for measuring the mechanical properties of geomembrane inflation deformation in water conservancy plain reservoirs, municipal waste landfills and other fields. , can measure the air pressure in the container and the bursting pressure of the geomembrane, and can automatically measure the crown height of the geomembrane inflation deformation by using an electronic ruler (such as a capacity grid or a grating), and obtain the stress-strain relationship curve of the geomembrane inflation deformation. Background technique [0002] In order to solve the problem of no regulation and storage reservoirs in some plain areas in northern my country, it is necessary to build a large number of plain reservoir regulation and storage projects. In the construction of plain reservoirs, reservoir seepage control is a key technical issue. In the anti-seepage design of plain reservoirs, for plain reservoirs wi...

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Problems solved by technology

In the early stage of reservoir impoundment, due to various reasons such as reservoir water leakage and rising groundwater level in the reservoir area, it is often easy for the gas in the unsaturated soil under the membrane to accumulate and rise, and to form pressurized gas under the geomembrane, resulting in geomembrane gas. Once the geomembrane is damaged, it will increase the leakage of reservoir water, cause a large amount of reservoir water loss, and affect the normal operation of the reservoir

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