滇中引水软岩隧洞施工支洞交岔口开挖控制技术  

Excavation Control Technology for Intersections of Construction Adits in Soft Rock Headrace Tunnel in the Central Yunnan

作　　者：殷本林[1] YIN Benlin(Sinohydro Bureau 7 Co.,Ltd.,Chengdu Sichuan 611730)

机构地区：[1]中国水利水电第七工程局有限公司,四川成都611730

出　　处：《四川水力发电》2023年第6期16-19,24,共5页Sichuan Hydropower

摘　　要：滇中引水工程大理段狮子山隧洞处于红尘软岩段,变形情况突出。为便于超长输水隧洞的施工设置了斜井作为施工支洞,鉴于该支洞与主洞交汇处结构跨度大,开挖支护期间其变形与稳定控制难度大。阐述了针对该支洞与主洞交岔口部位的分区分块、开挖程序、支护结构等具体情况采取的相关变形控制措施,以期对类似工程施工提供参考。The Shizishan Tunnel in the Dali section of the Central Yunnan Water Diversion Project is located in the red bed soft rock section with prominent deformation.In order to facilitate the construction of an ultra-long water conveyance tunnel,an inclined shaft has been set up as a construction adit.The structural span at the intersection of the adit and the main tunnel is large,making it difficult to control deformation and stability during excavation and support.This article explains deformation control measures taken based on the specific conditions,such as zoning and blocking,excavation procedures,and supporting structures at the intersection of the adit and the main tunnel,which can provide reference for the construction of similar projects.

关 键 词：滇中引水工程 软岩隧洞 交岔口 开挖控制技术 

分 类 号：TV7[水利工程—水利水电工程] TV52TV554TV523