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西昌铁路分局体育活动中心屋盖采用了“四加三卸”加载顺序的多次预应力钢穹网壳新型空间结构。设计时确定了预加应力体系结构的方案，配置了合理的预加力值，制定了可行的张拉工艺。实践证明该结构是一种高效、经济、安全、新颖的大跨空间承重结构体系，值得进一步研究推广。
The roof of the Sports Center of Xichang Railway Sub-bureau adopts the new spatial structure of multiple prestressed steel reticular domes with the “four plus three unloading” loading sequence. At the time of design, the pre-stressed system structure was determined, a reasonable pre-energization value was configured, and a feasible tensioning process was established. Practice has proved that this structure is an efficient, economical, safe, and novel large-span space bearing structure system that is worth further research and promotion.