宁德核电厂近海区沉积特征分析

Analysis to characteristics of sediment in offshore zone of Ningde nuclear power plant

为判明宁德核电厂近海区底质泥沙的组成与分布特征,研究电厂取排水工程泥沙问题,在工程区域至水下-10 m水深范围内进行了大面积的沉积物取样与分析工作,得出该海区沉积物质以粘土质粉砂和粉砂质粘土分布为主,平均中值粒径为0.0076 mm,属淤泥质海岸沉积性质。核电水上工程实施后,工程区外侧及其宏观水域的滩面物质组成,仍将基本维持工程前的泥质类,有利于滩面的稳定及设计标高条件下的取、排水安全。

In order to identify the bed material＇s composition and distribution characeristics in offshore zone of Ningde nuclear power plant and study the sediment＇ s conditions of the power plant＇ s works for water in take and drainage, we have completed the sediment＇s sampling and laboratory test in the sea area from the location of the project to - 10 m water depth. And concluded that the sediment in the sea area mainly distributed by clayey silt and silty clay, the average median particle size is 0.007 6 ram, the sediment can be classified to muddy coast deposition. After the nuclear plant＇s project being completed, the bed material in outer of the project and sea area in large scale still fundamentally maintain the sort of mud same to the sort of project not being constructed. This phenomenon makes benefits to the sea bed＇s stability and the safety for water in take and drainage under the design elevation.