摘要
目前,黄土隧道常采用长大管棚超前预支护进洞技术,洞口段管棚及支护结构设计参数还未形成统一的标准。在分析黄土隧道超前大管棚受力原理及设计参数的基础上,考虑到管棚注浆后的棚架作用,结合对管棚段预支护效果的认识,提出了几个需进一步研究的问题。
This paper analyzed the mechanical principle and design parameters of loess tunnel advanced pipe shed. Considering the scaffolding function after pipe shed grouting, combined with the pipe shed section preliminary support, it also put forward several questions need to be further studied.
出处
《山西交通科技》
2015年第2期59-61,共3页
Shanxi Science & Technology of Transportation
关键词
黄土隧道
超前大管棚
注浆
系统锚杆
荷载分担比
loess tunnel
advanced pipe shed
grouting
system bolt
load sharing ratio
