摘要
大临铁路红豆山隧道2号斜井花岗岩地层施工中遇大规模涌水造成淹井,针对红豆山隧道2号斜井反坡排水规模大、时间长、距离远、高差大的特点,优化分阶段反坡排水方案,提出基于水量监测和限量排放的分阶段反坡排水技术。通过物探手段判断隧道前方及周边富水区的位置和规模,采用探测孔降压泄水,并动态监控涌水量变化,分析可能造成的淹井长度与时间关系,提出不同涌水量限量排放标准,建立基于涌水量监测和限量排放的排水系统安全运行体系,解决反坡排水难题,避免因突发涌水造成的再次淹井,保证了施工安全,可为同类隧道施工提供参考和借鉴。
During the construction in the granite stratum of No.2 inclined shaft of Hongdoushan Tunnel of Dali-Lincang Railway,flooding was caused by large-scale water burst.Based on the reverse slope drainage characteristics of the No.2 inclined shaft of Hongdoushan Tunnel,i.e.large volume,long time,long distance and great elevation difference,the staged reverse slope drainage scheme is optimized,and the staged reverse slope drainage technology based on water inflow monitoring and limited discharge is put forward.The location and scale of the water-rich areas in front of and around the tunnel are judged by geophysical prospecting.The exploration holes are used to release pressure and discharge water,and the change of water inflow is dynamically monitored.The relationship between the length and time of flooded shaft is analyzed,limited discharge standards for different water inflows put forward,and the safe operation system of drainage system based on water inflow monitoring and limited discharge is established to solve the drainage problem of reverse slope,avoiding re-flooding caused by sudden water burst and ensuring the construction safety,which can provide a reference for similar tunnel construction.
作者
赵宇
全斐
沈家君
赵春杰
高明成
ZHAO Yu;QUAN Fei;SHEN Jiajun;ZHAO Chunjie;GAO Mingcheng(Dali-Lincang Railway Project Management Department,Railway No.10 Engineering Group Co Ltd,Lincang Yunnan 675800,China)
出处
《中国铁路》
2020年第12期191-198,共8页
China Railway
基金
中国中铁股份有限公司科技研究开发计划项目(2020-引导-315)。
关键词
铁路隧道
大坡度
长距离
分阶段
反坡排水
水量监测
限量排放
railway tunnel
heavy grade
long distance
staged
reverse slope drainage
water inflow monitoring
limited discharge
