Pressure-relief valve for geomembrane impervious layer

Abstract

The invention discloses a pressure-relief valve for a geomembrane impervious layer, comprising a valve body and a valve seat, wherein the valve body is formed by connecting a valve head part with a valve length part and connecting the valve length part with a valve tail part. The valve head part consists of an upper cover, a balance weight, a filter layer, a sand control net and an opening degree adjusting slide bar bolt; the balance weight is fixedly connected with the upper cover; the filter layer is fixed at the upper end of the valve head part; the sand control net is arranged on the periphery of the upper cover; and the upper cover is connected with a flange at the upper end of the valve head part through the opening degree adjusting slide bar bolt and can freely slide up and down along the opening degree adjusting slide bar bolt under the underground water pressure so as to adjust the opening degree of the upper cover or closing of the upper cover. The valve body is anchored and connected with the valve seat through the bottom flange at the valve tail part; and a geomembrane of the vakve body is bonded with a geomembrane paved on a water leakage layer by a bonding agent. The pressure-relief valve has simple structure, is flexible for action, can ensure the safety operation of a geomembrane impervious project, can be widely applied to the geomembrane impervious projects such as reservoirs, river channels, oxidation pond embankments and the like and can be applied to various geomembrane impervious projects.

Description

technical field [0001] The invention relates to a pressure reducing valve, in particular to a geomembrane which must be installed on the geomembrane when the geomembrane is used as the anti-seepage layer when the foundation cannot store water due to foundation leakage. Anti-seepage relief valve. Background technique [0002] When building reservoirs, rivers, ponds and other water storage projects, often due to foundation leakage, a layer of new anti-seepage material must be laid on the entire area of ​​the bottom of the river reservoir. A geomembrane with a thickness of about 0.5mm is used as the anti-seepage layer, and then used The in-situ soil with a thickness of about 0.5m is used for cover weight protection, and the anti-seepage effect is very good. However, when the groundwater around the river and reservoir is higher than the water level of the reservoir, due to the pressure difference, there will be a pressure on the geomembrane under the membrane. When the pressure...

AI Technical Summary

Problems solved by technology

The former of the above two methods increases the project cost and construction difficulty, and the latter is likely to be displaced or washed away during the drainage of air, resulting in artificial water leakage channels. Therefore, the above two methods are unreasonable and cannot guarantee the safe operation of the project.

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