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一,概况金汇港位于奉贤县中部,北起黄浦江,南入杭州湾,全长21.7公里,为奉贤县最大的引水、排水、航运骨干河道。金汇港工程由“金北水利枢纽”,金南水闸及河道三部分组成,一九八○年九月,前三项工程已先后竣工,余下出海滩地河道,位于海塘以外,施工方案未定、未能同时竣工。金汇港出海滩地长1500米,高程自3.7米逐步降至零下0.8米,自然坡降上滩段为2％左右、下滩段为3～5％。日夜有两次潮水淹没滩地。滩地土质为新近沉积层,上层有5～40厘米不等的淤泥,人工开挖,需筑围埝,工作量大。为此曾计划采用大、中型挖泥船开挖。我们根据以往水力搬泥的经验
I. Introduction Jinhui Port is located in the middle of Fengxian County, north of Huangpu River, south of Hangzhou Bay, a total length of 21.7 kilometers, Fengxian County is the largest diversion, drainage, shipping backbone of the river. The Jinhui Port Project consists of the “Jinbei Water Control Project”, the Jinnan Sluice and the river course. In September 1980, the first three projects were completed and the rest of the beach and river courses were located outside the seawall. The construction plan was undetermined , Failed to complete at the same time. Jinhui Port has a length of 1,500 meters from the beach and its elevation gradually drops from 3.7 meters to 0.8 meters below zero. The natural slope is about 2% on the upper beach and 3-5% on the lower beach. Day and night there are two flood tidal flat. Beach soil for the newly deposited layer, the upper 5 to 40 cm of mud, artificial excavation, to be built Wai, heavy workload. To this end had planned to use large and medium-sized dredger excavation. We based on past experience of hydraulic mud