本文以深圳市机场立交为例，着重介绍无粘结部分预应力工艺在立交跨线桥上的应用。总结了无粘结部分预应力空心板的优点以及使用后的社会效益和经济效益。 Taking Shenzhen Airport interchange as an example, this paper focuses on the application of unbonded prestressing technology on flyover bridges. Summarizes the advantages of unbonded partially prestressed hollow slabs and the social and economic benefits after use.