红层地区高瓦斯引水隧洞施工关键技术研究  

Research on Key Technologies for Construction of High Gas Water[HJ43x]Diversion Tunnels in the Red-bed Area

作　　者：滕鋆 杨帆 何诚 TENG Yun;YANG Fan;HE Cheng(PowerChina Chengdu Engineering Corporation Limited,Chengdu Sichuan 610072;Sichuan Tingzikou Irrigation Area Consturction Development Co.,Ltd.,Nanchong Sichuan 637000)

机构地区：[1]中国电建集团成都勘测设计研究院有限公司,四川成都610072 [2]四川省亭子口灌区建设开发有限公司,四川南充637000

出　　处：《四川水力发电》2024年第2期93-95,102,共4页Sichuan Hydropower

摘　　要：以亭子口灌区一期工程Ⅲ标金鸡梁隧洞为例,针对红层地区高瓦斯引水隧洞施工安全问题,结合红层地区粉砂质泥岩特性,分析了隧洞施工过程中采用的相应措施。结果表明:采用超前地质钻孔进行瓦斯释放与预报;利用人工检测与自动监测相结合的方式加强瓦斯监控;按照“一备一用”的要求配置以加强洞内通风;对机械设备加装车载瓦斯自动监控报警与断电系统以及尾气火花熄灭器,对隧洞用电进行“三专”“两闭锁”改造等有针对性的措施,可以时刻掌握隧洞内的瓦斯浓度变化,消除隐患,保证隧洞施工的安全,所取得的经验可为类似工程借鉴。Taking Jinjiliang tunnel of the third bid of Tingzikou Irrigation Area PhaseⅠProject as an example,aiming at the safety problem of high gas construction of diversion tunnel in red-bed area,combined with the characteristics of silty mudstone in red-bed area,the corresponding measures adopted in the construction process are analyzed.The results show that the gas release and prediction are carried out by advanced geological drilling.A the combination of manual detection and automatic monitoring is used to strengthen gas monitoring;configuration is carried out in accordance with the requirements of"one standby and one ready"to enhance ventilation in the tunnels;the mechanical equipment is equipped with a vehicle-mounted gas automatic monitoring alarm and power-off system and an exhaust spark extinguisher,and the tunnel power consumption is transformed into"three specialties"and"two locking";it can always grasp the change of gas concentration in the tunnel,eliminate hidden dangers,ensure the safety of tunnel construction,and provide reference for similar projects.

关 键 词：水利工程 红层地区 引水隧洞 高瓦斯 施工技术 瓦斯防治 金鸡梁隧洞 

分 类 号：TV91[水利工程—水利水电工程] TV76TV52TV554