This paper introduces excavation of the unfavorable geological section of tunnel project of Wanjiazhai YRDP, temporary brace and construction of concrete lining.
文中介绍了万家寨引黄隧洞工程不良地质洞段施工中的开挖，临时支护，混凝土衬砌等。
2
The temporary concrete lining guard wall method was used in excavating vertical shaft.
竖井开挖采用了临时混凝士衬砌护壁措施。
3
Wet shotcrete, including wet steel fiber shotcrete and wet plain shotcrete, has been adopted for the temporary and permanent lining of Qinling Railway Tunnel and good results have been obtained.