小断面浅埋软岩隧洞悬臂掘进机施工成本管理  

Construction Cost Management of Cantilever Roadheader for the Small Section Tunnel Shallowly-buried by Soft Rock

作　　者：杜进军[1] DU Jinjun(Sinohyro Bureau 5 Co.,Ltd,Chengdu Sichuan 610066)

机构地区：[1]中国水利水电第五工程局有限公司,四川成都610066

出　　处：《四川水力发电》2023年第2期140-144,共5页Sichuan Hydropower

摘　　要：四川省向家坝灌区北总干渠一期一步工程内江供水管道工程自贡段石塔村隧洞为小断面浅埋软岩长引水隧洞,采用悬臂掘进机进行开挖施工,通过提高设备完好率、合理确定运转时间、合理配备出渣设备、不同围堰类别洞段采取不同时段进行锚喷支护、优化临时设施、降低消耗等精细化管理措施,在进度、断面控制、对围岩的扰动、降低通风排烟等方面取得了一定成效,达到了缩短工期、降低成本的目的,可供类似隧洞开挖借鉴。The Zigong Shita Village tunnel,part of Neijiang Water Supply Pipeline Project that belongs to the First-step-first-phase of the North Main Canal of the Xiangjiaba Project Irrigation Area in Sichuan Province,is a headrace tunnel with small section shallowly-buried by soft rock,which is excavated by cantilever roadheader.With fine management measures such as improving the integrity rate of equipment,reasonably determining the operation time,reasonably equipped with slag discharge machines,adopting different intervals for various types of cofferdam to carry out shotcreting support,optimizing temporary facilities and reducing consumption,some achievements have been made in progress,section control,disturbance to surrounding rock,reduction of ventilation and smoke exhaust,etc.,shortening the construction period and reducing the cost,which can be used as a reference for similar tunnel excavations.

关 键 词：小断面 浅埋 软岩 长隧洞 悬臂掘进机 成本 管理 

分 类 号：TV554.2[水利工程—水利水电工程]