In the first part of the paper, variation principles in the elastic and creep theory for prestressed concrete plates are derived respectively.
文中第一部分分别导出了预应力混凝土板在弹性理论和徐变理论中的变分原理。
The bored cast in place concrete piles embedded in rock were used in the main structure. The post grouting prestressed pipe piles adopted in the design were the first time applied in the karst area.
航站楼的主体结构采用嵌岩冲孔桩，设计中采用的后压浆预应力管桩是首次在岩溶地区应用。
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