For the first time in China, the precast assembly technology is used to build the large underground stations and a new kind of closed cavity thin-walled component was developed to reduce the weight of the structure in Changchun Metro Line 2. This paper set up a numerical model for the typical straight closed cavity thin-walled component and conducted a parameter study to obtain the influence of the end plate on stress transfer of the component. The result shows that the best performance is achieved when the ratio of the end plate thickness to height is 0.43 and over-thick end plate does not improve the force performance significantly.

Underground Structure