Built-in anti-seepage geomembrane damage monitoring method based on optical fiber temperature-measurement principle

Abstract

The invention relates to a rapid damage positioning scheme for an internal geomembrane in anti-seepage engineering, belonging to the technical field of hydraulic engineering (civil engineering)- anti-seepage engineering. The method comprises the following steps of: combining continuous optical fibers and the geomembrane into a whole, wherein the optical fibers are uniformly arranged in a snakelike shape on the geomembrane, and the distance between the optical fibers is not greater than the temperature-sensitive distance of double optical fibers; using the geomembrane as an anti-seepage material and making the optical fiber path of the whole anti-seepage area through; leading out the endpoints of the optical fibers to an optical fiber temperature-measurement detection device and covering aprotective layer of the geomembrane; and establishing a conversion formula between the XY coordinate values of optical fiber length L and an anti-seepage face according to the arrangement design of the anti-seepage engineering, monitoring the temperature of each position of the geomembrane by adopting the optical fiber temperature-measurement detection device, judging the area with abnormal temperature comparison to be a seeping position and judging the position with highest temperature abnormality to be the central position of the geomembrane damage. The method solves the problem of difficult damage positioning of the geomembrane and can obviously improve the safety of a dam using the geomembrane as an anti-seepage body.

Description

technical field

[0001] The invention relates to a method for locating a damaged geomembrane inside an anti-seepage engineering, and belongs to the technical field of water conservancy engineering (civil engineering)—anti-seepage Background technique

[0002] Seepage damage is the most important cause of dam collapse disasters. Among the constituent materials of the anti-seepage body, geomembrane is cheap, has good anti-seepage effect, and has the obvious advantage of adapting to the deformation of the dam body and foundation. It is almost the preferred material in earthquake-prone areas, especially in karst landform areas. Since the relevant technology was introduced into my country in the 1970s, a complete set of standards and procedures for geomembrane production, inspection, anti-seepage body design, construction quality control, and acceptance has been formed, and the overall life span has also been significantly improved—life expectancy It has been nearly a hundred year...

Images