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What is the application of Geomembrane in reservoir reinforc
The reinforcement scheme of earth dam body is summarized. Generally, the seepage control reinforcement is carried out. The methods include heightening and thickening the earth dam, laying geomembrane, filling grouting, etc., but the common schemes are: high pressure jet grouting, splitting grouting, concrete cutoff wall, M7.5 mortar masonry surface layer retaining, etc. The upper end of the composite geomembrane is anchored. The anchorage length of the composite geomembrane is 17cm. 5mm × 50mm chloroprene rubber strip gasket is anchored at the anchorage position of concrete tooth wall foundation. Then, 5mm × 4mm chloroprene rubber strip and 0.75mm thick steel strip are used as compression sheet. The composite geomembrane is anchored on the concrete tooth wall foundation by shooting nails with nail spacing of 15cm. Finally, concrete is used to backfill and seal. The concrete thickness is 20cm.
The lower end of the composite geomembrane is anchored. The lower end of the composite geomembrane is anchored on the outer side of the top of the vertical impervious concrete cutoff wall of the dike foundation. When the composite geomembrane is laid, the lower end of the composite geomembrane is anchored on the vertical plane. The anchoring method is the same as that of the upper end. The protective layer shall be laid on the top of the composite geomembrane, and the 20 cm thick sand gravel cushion shall be evenly laid, and then the 12 cm thick precast concrete slab shall be laid. The geomembrane on the dam slope shall be rolled and laid along the direction perpendicular to the dam axis from the top to the toe of the dam; the platform at the toe of the slope shall be rolled horizontally parallel to the axis of the dam. After spreading, it shall be leveled and aligned manually. The composite geomembrane on the slope surface and the composite geomembrane on the platform at the foot of the slope are above the tooth wall of the slope protection. When laying, the tightness is moderate, the margin is about 1.5%, avoiding the stress concentration, and also conducive to splicing. The laying requires that the composite geomembrane should be consistent with the coarse sand cushion, and there should be no protruding folds; the actual setting out and cutting should be carried out at the site at the change of slope surface. When composite geomembrane is used, crushed stone protection layer is laid on the upper layer to prevent wind blowing and protect the composite geomembrane from damage. In order to prevent man-made damage to the composite geomembrane, it is forbidden to wear hard soled shoes or shoes with nails, and to throw debris on the composite geomembrane.
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