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近几年来,沥青薄膜广泛用于水库库盘防渗,土石坝的直立防渗层或倾斜防渗层,坝和闸的上游防渗铺盖,混凝土坝的挡水面防渗及渠道防渗等。采用这种防渗措施可以降低工程造价,缩短工期。沥青薄膜防渗在国外已经是一项成熟的技术。第二次世界大战以后,美国在这方面获得了较大进展。1947～1951年,美国使用沥青薄膜对150万平方米的渠道表面进
In recent years, the asphalt film is widely used in seepage prevention of reservoirs and reservoirs, upright seepage prevention layer or slope seepage prevention layer of earth-rock dam, upstream seepage prevention cover of dam and gate, seepage prevention of seepage surface of concrete dam and canal seepage prevention. Using this seepage control measures can reduce the project cost and shorten the construction period. Asphalt film seepage control in foreign countries is already a mature technology. After the Second World War, the United States made great progress in this regard. From 1947 to 1951, the United States used bitumen film to feed 1.5 million square meters of surface channels