天津建设科技2025，Vol.35Issue(3)：17-21,5.DOI:10.3969/j.issn.1008-3197.2025.03.005
穿越冲沟段浅埋偏压隧道洞口关键设计研究
Study on Key Design of Shallow Buried Bias Tunnel Entrance Crossing Gully
万志文 1周锦强 1杨雄 1敬怀珺1
作者信息
- 1. 湖南省交通规划勘察设计院有限公司,湖南 长沙 410008
- 折叠
摘要
Abstract
Aiming at the problems such as shallow buried pressure,poor geology and rich groundwater when the tunnel crosses the gully section,based Shisaiao Tunnel of Nanbin Highway in Guangxi,the drainage method of the tunnel entrance in the gully area was studied.Through hydrologic calculation and analysis,the waterproof and drainage method at the tunnel portal was obtained.At the same time,the deformation of tunnel initial sup-port structures and the selection of support parameters were analyzed and compared in different excavation methods under shallow buried bias pressure by numerical simulation.The results showed that the reserved core soil method had fewer construction processes,and better construction and deformation control.The shal-low buried section in the gully at the tunnel entrance was excavated using the reserved core soil method;Aux-iliary construction measures such as advanced large pipe shed,and grouting towards the inner diameter of the tunnel,the initial support is equipped with anchor,steel mesh,and I20b steel arches,secondary lining was reinforced with a 50 cm thick reinforced concrete lining structure are adopted.Based on on-site measurement and analysis,the research on the waterproofing and drainage methods,excavation methods,and support types for shallow buried and bias tunnels crossing gullies can ensure construction and structural safety.关键词
隧道洞口/冲沟/浅埋偏压/排水方式Key words
tunnel portal/gully/shallow buried bias/drainage method分类
交通运输引用本文复制引用
万志文,周锦强,杨雄,敬怀珺..穿越冲沟段浅埋偏压隧道洞口关键设计研究[J].天津建设科技,2025,35(3):17-21,5.
