Abstract: In this paper, the stress distribution of the spiral case of 4 # turbine in left powerhouse is analyzed through monitoring of the stress of the key section of the spiral case in the process of the pressure test. The stress distribution and its rules of the spiral case are studied in the pressure test. These can provide criterion for the design of concreting with water in the spiral case for taking on load.?

摘要： 通过对三峡工程左岸电站4#机组蜗壳水压实验的全过程监测,分析蜗壳关键断面在加压、保压以及卸压过程中的钢板应力状况,得出蜗壳在整个过程中的应力变化及分布规律。为蜗壳充水加压、保温保压下二期混凝土施工及蜗壳自身的承载情况提供了依据。?