中文摘要：

结合我国水电站垫层蜗壳结构工程应用的发展近况，介绍了近年来垫层蜗壳结构设计理念的转变，指出了直埋一垫层组合方案将成为未来水电站蜗壳埋设方式选择的发展趋势。总结了垫层蜗壳结构研究发展中取得的两个重要进展——钢蜗壳与外围混凝土联合受力、钢蜗壳与外围混凝土之间滑动摩擦，指出考虑垫层材料的非线性力学性能将是垫层蜗壳结构研究的发展趋势。分别阐述了垫层材料属性和空间属性对蜗壳结构受力特性的影响，在此基础上，归纳了垫层蜗壳结构研究存在的问题，最终提出未来的垫层蜗壳结构研究应强调“控制”的研究理念，视垫层为“控制工具”，以全新的视角看待垫层的作用，探求控制蜗壳结构受力特性的理论与方法。

英文摘要：

The development in the research and application of spiral case structure with a membrane（SC- SM） in hydroelectric power plant, is summarized. It is indicated that SCSM is the trend in development of selecting the embedding type for spiral case. Two significant advances are pointed out： the joint stressing of spiral case and surrounding concrete, the sliding friction between them. The nonlinear mechanical behav- ior of membrane material as a factor influencing significantly the SCSM research should be considered in the future. The influences of membrane＇s material and space property on the structural performances of SC- SM are respectively stated, and on that basis the existing problems of the SCSM research are concluded. Fi- nally, it is suggested that the of concepte control should be the focus of research in SCSM and the mem- brane could be regarded as a controlling measure. To explore the theory and measure for controlling the structural performances of spiral case structure from the viewpoint of effect of membrance should be the im- portant topics of research in this field.