Ash dam upstream fitting-slope seepage draining structure

Abstract

The invention belongs to the field of ash dam structures and particularly relates to an ash dam upstream fitting-slope seepage draining structure of hydraulic ash dams and dry ash dams suitable for fuel coal thermal power plants. Geotechnical cloth and a geomembrane are adhered to two sides of a geonet through thermal bonding to form the fitting-slope seepage draining structure. A bottom layer sand protecting layer 100mm in thickness is laid on an ash dam upstream nature soil slide slope after the slope is finished. The fitting-slope seepage draining structure is laid on the bottom layer sand protecting layer, the geomembrane faces the ash slope upstream natural soil side slope, and the geotechnical cloth faces an ash layer. An upper layer sand protecting layer 100mm in thickness is laid on the geotechnical cloth side of the fitting-slope seepage draining structure, and slope protection rock blocks are constructed. The fitting-slope seepage draining structure has the advantages that the construction cost of the fitting-slope seepage draining structure is 35 yuan / m<2>, and construction cost is reduced by about 65%; traditional fitting-slope seepage draining structures needs to be synchronously constructed with a dam body, construction interference is large, the fitting-slope seepage draining structure can be constructed after the dam body is constructed, construction interference is avoided, and construction period is lowered effectively.

Description

technical field [0001] The invention belongs to the field of ash dam structures, and in particular relates to an ash dam upstream slope pasting seepage drainage structure applicable to hydraulic ash storage dams and dry storage ash dams of coal-fired thermal power plants. Background technique [0002] Ash dam is a hydraulic structure used by coal-fired thermal power plants to store ash and retain water in the valley ash yard, and it is mostly filled with earth, stone or ash. Drain on dam slope is a surface drainage facility laid on the upstream slope of the ash dam, which prevents gray water from entering the dam body, causes seepage damage to the dam slope soil, and protects the upstream slope of the ash dam from damage. scour. Traditional slope drainage structures are mostly composed of geotextiles and block stones, which have high requirements for various materials. Stones need to be hard, fresh, and seamless peeling layers, and should be weather-resistant and maintain a...

AI Technical Summary

Problems solved by technology

Traditional slope drainage structures are mostly composed of geotextiles and block stones, which have high requirements for various materials. Stones need to be hard, fresh, and seamless peeling layers, and should be weather-resistant and maintain a high level after immersion Due to the characteristics of strength, the tensile strength and bursting strength of geotextiles are high; the thickness of this kind of slope drainage structure is as high as 1.0m, and it needs to be constructed at the same time as the dam body filling. There are many processes, and the construction interference between each process Large, and easy to cause damage to the geotextile, so the traditional slope drainage structure has defects such as poor economy, long construction period, unstable drainage, and poor anti-seepage effect

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