摘要
在施工大型长距离输水隧洞过程中常常会遇到不良地质情况,经常出现围岩失稳、塌方造成人员伤亡和设备损失,不仅延误工期、增加造价,还造成生命财产的损失。以清水海供水及水源环境管理项目不良地质输水隧洞为例,通过高外水压力、高地应力、其他不良的地质问题分析,采用相应喷锚、钢支撑、钢筋混凝土等加强处理措施,并通过FLAC^(3D)进行数值模拟分析。结果表明:支护结构承受部分围岩压力,开挖断面变形整体趋于均匀,隧洞周边塑性区有所改善,隧洞围岩变形明显改善,围岩应力减少,因此支护措施对于改善开挖面浅层的岩体质量有一定的效果,对围岩应力起明显的限制作用,不良地质输水隧洞处理措施是合理的。
The underground engineering especially in large scale and long distance water conveyance tunnel often encounter bad geological conditions,often rock instability and collapse causing casualties and loss of equipment in the construction process.Not only delay the construction period,increase the cost,but also cause the loss of life and property.The Qingshui sea water supply and water environment management project of bad geological tunnel as an example,the high external water pressure,ground stress analysis and other adverse geological problems,the corresponding spray anchor,steel support,reinforced concrete measures to strengthen measures,and through the FLAC^(3D)numerical simulation analysis,the result showed: The supporting structure under the pressure of surrounding rock,excavation deformation tends to be uniform,the plastic zone around the tunnel had improved significantly improve the deformation of surrounding rock of tunnel,and the surrounding rock stress was reduced,thus supporting measures for the improvement of the excavation had a certain effect on rock mass quality in shallow layer,the surrounding rock stress was obviously limited,bad water conveyance tunnel geological treatment measures is reasonable.
出处
《能源与环保》
2017年第11期215-219,共5页
CHINA ENERGY AND ENVIRONMENTAL PROTECTION
关键词
不良地质
输水隧洞
处理措施
数值模拟
bad geological
water conveyance tunnel
treatment measures
numerical simulation
