造价通
更新时间:2025.02.22
洞身长管棚施工工艺

格式:pdf

大小:162KB

页数: 2页

简述了福建省南平市岭根隧道浅埋富水软弱围岩段的超前预支护施工工法及各施工工序。

洞身长管棚施工工艺新技术-最新年文档

格式:pdf

大小:14KB

页数: 9页

洞身长管棚施工工艺新技术 : A new technique for long pipe roofs applied in tunnel barrel instead of the oldstyled technology when it gets through shallowly buried , biased and weak formations was introduced , which means that the aperture and pipe roof will be formed and completed synchronously by using 50 m Φ121 steel tubes to keep in step closely with the drilling bit without cleaning out the hole and

热门知识

洞身管棚

精华知识

洞身管棚

最新知识

洞身管棚
点击加载更多>>
专题概述
洞身管棚相关专题

分类检索: