摘要
基于滇中引水工程,结合隧洞工程施工过程遇到的不良地质问题,针对隧洞工程不同实施阶段地下水渗流场动态演化,建立了一套适用于基于渗流场动态演化的高外水压力条件下深埋长隧洞工程全阶段渗控体系,对隧洞开挖的不同阶段提出相应的渗控措施,并根据外水压力的大小设置不同的固结灌浆圈.将该理论应用于滇中引水工程龙泉隧洞下穿铁峰庵断裂及松林水库段,该段隧洞施工过程中洞内多以滴渗水为主,未发生涌水突泥事件,未对地下水及地表库塘造成不良影响,洞内无大规模塌方问题,隧洞围岩变形在控制范围内.该理论可以有效预见及降低隧洞开挖风险,减少工程投资,保证施工安全和工程进度.
Based on the Dianzhong water diversion project,combined with the adverse geological problems encountered during the construction process,this paper establishes a set of seepage control system for the whole stage of deep-buried long tunneling project under high external water pressure based on the dynamic evolution of seepage field at different stages of the implementation of the tunnel project,proposes the corresponding measures at different stages of the excavation of the tunnel,and sets up different solidification grouting circles according to the size of the external water pressure.The theory is applied to the Longquan Tunnel of the Central Yunnan Water Diversion Project,which passes through the Tiefeng'an Fracture and Songlin Reservoir.During the construction process,seepage is mainly in the form of multi-drops,and there is no incident of water surging and mud bursting,no adverse impact on groundwater and surface reservoirs,and there is no large-scale landslide problem,and the deformation of the tunnel perimeter rock is within the range of control.This theory can effectively predict and reduce the risk of tunnel excavation,reduce project investment,ensure construction safety and project progress.
作者
闫尚龙
孙云
刘博伟
向天兵
YAN Shanglong;SUN Yun;LIU Bowei;XIANG Tianbing(POWERCHINA Kunming Engineering Co.,Ltd.,Kunming 650051,China;Yunnan Dianzhong Water Diversion Engineering Co.,Ltd.,Kunming 650051,China)
出处
《三峡大学学报（自然科学版）》
CAS
2023年第5期19-24,共6页
Journal of China Three Gorges University：Natural Sciences
基金
云南省重大科技专项计划项目(202102AF080001)。
关键词
渗流场
高外水压力
水工隧洞
渗控体系
不良地质
seepage field
high external water pressure
hydraulic tunnel
seepage control system
adverse geological features
