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一、基本情况及存在问题钱塘江河口属强潮海相河口。强劲的涌潮动力,易冲的粉眇土地基,以及无围堰抢潮施工,是钱塘江海塘与水闸防冲加固工程的三大特点。而粉砂土的易冲性则是工程设计与施工中需考虑的重点。迄今在一些水闸防冲槽及海塘护岸的设计与抢险中,由于忽视粉砂土易冲这一特点,或引用仅适用于粘性土条件的滤层与防冲槽,以至造成工程出险,耗费大量资金的情况多有所闻。
First, the basic situation and existing problems Qiantang estuary is strong tidal sea mouth. Strong tidal force, easy to red soil foundation, and no cofferdam construction, is the Qiantang seawall and sluice anti-red three major features of the project. The easy-red silt is the project design and construction needs to be considered key. Hitherto, in the design and rescue of some sluice gates and seawall revetments, due to the neglect of the characteristics of silt and clay, or to the filter layer and the anti-erosion slot applied only to clayey soils, as a result, the project takes a lot of risks The situation of funds is much heard.