摘要:
天津塘沽东疆港区海岸位于海河口和永定新河口之间,是典型的粉砂淤泥质海岸,潮滩低平,沉积物黏、滑而下陷,海水含沙量极高,风暴潮期间水深浪大,缺乏建沙滩的工程地质条件。通过采取建3.8 km长的半封闭防波堤围堰、竹筏—土工布沙泥隔板、双沙泥界网和人工抛沙20万m3等措施,于2008年建成长1 370 m,宽140 m的人造沙滩。泥岸养滩是我国的首创,国外尚无一例。目前我国在淤泥质岸上已建了十多个人造沙滩,最成功的有上海金山、天津东疆和潍坊央子3处,分别在建围堰、隔板、界网以及沉泥碧水等方面积累了较好的经验。
Abstract:
The Tianjin Tanggu Dongjiang harbour is located between the Haihe River estuary and the Yongding River estuary. It is a typical muddy coast with low tidal flat and stick and slip sediments. The sediment concentration of sea water is high and the wave is strong during the storm surge. Therefore, there was no engineering geological condition to building sand beaches. After construction of a semi-closed breakwater cofferdam which is 3.8 km long, and a sand-mud separator which consists of Bamboo raft-geotextile, an artificial beach, which is 1 370 m long and 140 m wide, was constructed in 2008. It has successfully provided conditions for swimming and summer holidays. Beach nourishment at muddy coast is an innovation by Chinese. So far, we have built tens of artificial beaches along the muddy coasts of China, among which, the artificial beaches at Shanghai Jinshan, Tianjin Dongjiang and Weifang Yangzi are the most successful ones. They have provided useful experiences in building cofferdam, separator, sector net and the facilities to precipitate mud and clean water.
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