Continuous stable pressurization type geomembrane liquid expansion deformation mechanical testing device

Abstract

The invention relates to test equipment applicable to measurement of the liquid expansion deformation mechanical property of geomembranes in membrane-paving seepage-proofing projects in the fields of water conservancy plain reservoirs, municipal refuse landfills and the like. The test equipment is characterized in that the liquid expansion deformation mechanical property test of the geomembranes under the overburden pressure can be carried out, the hydraulic pressure and the expansion breakage pressure of the geomembranes in a container can be measured, the overburden hydraulic pressure can be supplied for the geomembranes, the crown height of the liquid expansion deformation of the geomembranes can be automatically measured by virtue of a laser displacement sensor, and then a strain relation curve of liquid expansion deformation strain of the geomembranes can be obtained. A continuous stable pressurization type geomembrane liquid expansion deformation mechanical testing device comprises a pressurization system, a liquid expansion sealing device, a burden pressure device and a measurement and control system. An original pump type hydraulic pressure supply manner is abandoned in the pressurization system of the device, and an autonomously designed continuous stable pressure supplying device is adopted. The liquid expansion sealing device mainly consists of an upper flange disc, a lower flange disc and a horizontal operation platform, and a hydraulic sealing space is formed. The burden pressure device consists of an organic glass cylinder and a flange disc. The measurement and control system consists of a precise digital display pressure sensor and the laser displacement sensor.

Description

technical field [0001] The patent of the invention relates to a test equipment for measuring the mechanical properties of liquid swelling deformation in the field of water conservancy plain reservoirs, municipal waste landfills, etc. The mechanical properties test can measure the hydraulic pressure in the container and the bursting pressure of the geomembrane, and can provide the overlying water pressure for the geomembrane, and can use the laser displacement sensor to automatically measure the crown height of the geomembrane liquid expansion deformation, and obtain the geomembrane liquid expansion Deformation stress-strain relationship curve. 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...

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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, the gas in the unsaturated soil under the membrane is often easy to accumulate and rise, and form pressurized gas under the geomembrane, resulting in geomembrane liquid. Once the geomembrane is damaged, it will increase the leakage of reservoir water, cause a large amount of water loss, and affect the normal operation of the reservoir

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