（悉地国际设计顾问（深圳）有限公司，上海 200433）

[摘要]  地下枢纽工程局部区域具有大跨度、重荷载的特点。某枢纽工程地下室顶板覆土厚度为1.1~1.8m，局部区域梁跨度为16.8~21m，出地面高架平台楼面梁纵向跨度为21m，横向跨度为16.2m并挑出6m，楼面活荷载为20kN/m²。介绍了该工程预应力梁的设计思想和方法，可供同类工程参考。

[关键词]  地下枢纽；大跨度结构；预应力混凝土梁

中图分类号：TU398+.9               文献标识码：A         文章编号：

作者简介：史晓宇，博士， Email：shixy1978@126.com。

Design on prestressed concrete beams of underground control building

Abstract: Large-span and heavy load are the characteristics of underground control buildings. The depth of soil upon top slab of an underground control building is variable from 1.1 meters to 1.8 meters, and the spans for some beams are 16.8 meters or 21 meters respectively. Span of longitudinal beam for the trestle is 21 meters, and transverse beam is 16.2 meters with cantilever beam extended for 6 meters. The live load of slabs is 20kN/m². Design method and considerations for prestressed concrete beamswere discussed, which can be used in the same structures.

Keywords: underground control building; large-span structure; prestressed concrete beam

参 考 文 献

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