Earth-rock dam deep-base seepage-control water-stopping structure for water conservancy and hydropower project
A water conservancy and hydropower, dam foundation anti-seepage technology, applied in water conservancy projects, marine engineering, construction, etc., can solve the problems of inability to adapt to the depth of the dam foundation and the requirements of the anti-seepage structure, control within 70m, and prominent anti-seepage problems, etc. The effect of preventing leakage, improving rationality, improving impermeability and durability
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[0030] Example 1: As shown in Figure 1, Figure 3 ~ Figure 5 Shown is the anti-seepage and water-stop structure of the deep foundation of the present invention for the face rockfill dam. The deep anti-seepage layer of the dam foundation is divided into two sections, the upper anti-seepage layer 4 and the lower anti-seepage layer 6, by the reinforced concrete connecting gallery 5 as the boundary. , The upper impermeable layer 4 strong permeable foundation adopts concrete impervious wall to prevent seepage, the ground construction, the maximum wall depth is 80m; the lower impervious layer 6 foundation has medium to weak water permeability, adopts 3 rows of grouting curtains to prevent seepage, in corridor 5 For construction, the maximum depth of the curtain is 120m, and the bottom of the curtain is 3~5m deep into the impervious foundation; the net size of corridor 5 is controlled by the needs of curtain construction and is determined to be 3m×3.5m.
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[0031] Example 2: As shown in Figure 2, Figure 6 ~ Figure 7 Shown is the deep foundation anti-seepage and water-stop structure of the present invention for the core rockfill dam. It is based on the above-mentioned structural form. The deep anti-seepage body of the dam foundation is divided into the upper anti-seepage structure by the reinforced concrete connecting gallery 5 as the boundary. Layer 4 and lower impermeable layer 6 are two sections. The upper impermeable layer 4 is strongly permeable foundation with concrete impervious wall, ground construction, the maximum wall depth is 80m; the lower impervious layer 6 has strong water permeability to medium, and the first 60m is used The concrete anti-seepage wall and the rear 60m adopt a grouting curtain, and the bottom of the curtain is 3~5m deep into the impervious foundation; the net size of corridor 5 is controlled by the construction needs of the anti-seepage wall and is determined to be 6m×6.5m.
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