引洮供水二期工程总干渠23号隧洞施工方案研究

Study on Construction Scheme of Main Channel No.23 Tunnel of Tao River Water Diversion Phase Ⅱ Project

引洮供水二期总干渠23号东正川隧洞,具有地形地质条件复杂、隧洞特长、断面小且作业环境高原缺氧等特点,施工方案合理选择是控制工程总工期的技术关键。文章结合隧洞分段地质条件,从地质适宜性、施工技术难度、征地与环保、工程投资等方面,进行了详细论证分析,优选工程匹配性佳、技术经济性好的钻爆法方案,满足投资及工期要求。

No.23 Dongzhengchuan Tunnel of Tao River Water Diversion Phase II Main Channel is characterized by complex topographic and geological conditions,extremely long tunnel,small section,high altitude anoxic working environment,etc.Reasonable selection of construction scheme is technical key to control the total construction period of the project.Geological conditions of tunnel sections are combined for detailed argumentation and analysis from the aspects of geological suitability,construction technical difficulty,land acquisition and environmental protection,engineering investment,etc.in the paper.The drilling and blasting method scheme with excellent engineering matching and technical economy is selected so as to meet the requirements of investment and construction period.