新型聚氨酯碎石空心块体生态堤结构构建

Structure creation of new type of ecological embankment made of PPM hollow block

为降低工程对河口环境的不利影响、提升生态效应,依托长江口南槽航道治理一期工程整治建筑物工程进行生态堤结构研究。根据长江口生物类群生态特征并结合工程影响因素,确定大型底栖动物作为目标生物研究对象,分析给出主要优势物种的生境需求特性和关键指标。在此基础上,提出新型生态聚氨酯碎石空心块体结构,给出堤身结构设计形式,并通过流体动力学数值方法对比研究不同块体平面组合布置方式。提出新型空心块体结构的施工工艺,进行结构吊运内力有限元分析,并通过实际施工试验验证可行性。

In order to reduce the adverse effect of the project on the estuary environment and improve the ecological effect,we carry out a study on the ecological embankment structure based on the Yangtze estuary south channel regulation phase I project.According to the ecological characteristics of the biological groups in the Yangtze estuary and the engineering influencing factors,we select the large benthic animals as the target biological objects,and analyze the habitat demand characteristics including key indicators of the dominant species.On this basis,we propose a new type of ecological hollow block structure made of porous polyurethane mixture(PPM),and give the design of embankment body structure;in addition,by the method of computational fluid dynamics,we compare and study the layout of blocks.The construction technology of the new hollow block structure is put forward,and the finite element analysis is carried out.Furthermore,the feasibility is verified by the actual construction test.