太湖竺山湖环保疏浚土污染程度及特征评价分析

Evaluation and analysis on pollution degree and character of environmental dredged soil in Zhushanhu Lake

对太湖竺山湖区域的底泥进行了环保疏浚勘察,初步进行了野外勘察分层,大致分为三层:污染层、过渡层和正常层。分析了太湖竺山湖底泥沉积特征,选取代表性的土层采取原状土样和化学样品,进行了物理力学指标和化学指标的测试,并对底泥的指标进行了统计分析。利用内梅罗污染指数法对环保疏浚底泥进行了污染程度及污染类型的评价分析,从而使污染底泥环保疏浚厚度有据可依。

The environmental dredged investigation on the sediment in Zhushanhu Lake are carried out, and the sediment had been primarily layered on site, which include the contamination layer, the transition layer and the normal layer. The sedimentary characteristics of the bottom mud are analyzed, and the undisturbed soil samples and chemical samples at representative soil layers are taken. The physical and mechanical indices and the chemical indices are tested, and the statistical analysis on the indices of the sediment is carried out. The extent and the type of the pollution of environmental dredging sediment are evaluated by using the method of Nemerow pollution index, so that it is evidence-based to the thickness of the environmental dredging contaminated sediment.