人民珠江2025，Vol.46Issue(11)：35-43,9.DOI:10.3969/j.issn.1001-9235.2025.11.005
富水破碎带浅埋隧洞下穿省道开挖超前支护效果研究
Effectiveness of Advanced Support for Shallow-Buried Tunnel Excavation Under-Crossing Provincial Highway in Water-Rich Fractured Zone
摘要
Abstract
To address the safety control challenges of shallow-buried tunnels under-crossing provincial highways in water-rich fractured zones,this study took the Genzi Tunnel project(C1 section)of the Guangdong Water Resources Allocation Project in the Beibu Gulf Metropolitan Area as a case study.Numerical simulations and field measurements were employed to investigate the advanced support using small conduits and pipe sheds,and the effectiveness of three advanced support schemes was analyzed:small conduits alone,pipe sheds alone,and combined small conduits with pipe sheds.The findings show that ① The fluid-solid coupling numerical model effectively simulates and predicts the support process during the construction of shallow-buried tunnels under-crossing provincial highways in water-rich fractured zones.② Dual support and pipe shed support schemes can effectively reduce and control surface subsidence compared to the small conduit scheme.③ The arching effect generated by pipe sheds induces substantial stress concentrations during initial support at the vault springing of outermost pipe shed elements.Therefore,it is necessary to consider the adverse effect of the possible stress concentration on the initial support force when arranging the support scope of the pipe shed.The dual support scheme integrating pipe sheds and small conduits proves effective in ensuring safety during the construction of tunnels under-crossing provincial highways.关键词
隧洞/超前支护/管棚/下穿/沉降Key words
tunnel/advanced support/pipe shed/under-crossing/subsidence分类
建筑与水利引用本文复制引用
张海旺,王振明,万发,李廷冲,廖文广,黄湘宜..富水破碎带浅埋隧洞下穿省道开挖超前支护效果研究[J].人民珠江,2025,46(11):35-43,9.基金项目
国家自然科学基金青年基金项目(42407253) （42407253）
中国水利水电第六工程局轨道工程公司-环北部湾C1标项目-029 （）
