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1·As a result of the different position of prestressing strands, the structure system has multiform space shape, such as barrel vault, hypar and dome.

通过改变预应力索在网架中的位置，可张拉得到不同的曲面形状，如柱面、穹顶和鞍形网壳。

2·In this paper architectural shapes and space characteristic, structural forms of latticed groined barrel vault and its support methods are discussed.

本文讨论了叉筒网壳的建筑造型方法和空间特点、结构布置形式、结构支承方式等方面的内容。

3·Based on this method, the design and construction of barrel vault advanced support in line Fuxingmen to Bawangfen of subway and the heating pipe in Beijing got a perfect result.

按此方法指导的水平管棚设计施工在北京地铁复八线和热力管道工程中取得了良好的效果。