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Key Technology of Excavation in Existing Underground Space and Its Application to Urban Rail Transit
Author(s): 
Pages: 32-38
Year: Issue:  9
Journal: Urban Mass Transit

Keyword:  existing underground spaceexcavation of story-adding stepkey technology;
Abstract: 研究了一种软土地质条件下对既有地下空间进行暗挖加层的设计与施工方法.即:利用结构顶板作为天然盖板,将整个地下结构托换后向下逐步暗挖完成地下结构的加层.其具有不需进行大开挖、不影响地面交通、无需管线搬迁、节省工程投资等特点,尤其适用于在城市中心区域将一层地下结构暗挖改造成地下二、三层结构.可以为改善轨道交通车站规模和换乘方式、住宅小区车库扩容等项目提供新的解决方案,是一种城市地下空间二次开发的设计施工新工艺,在国际上属于首创.
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