围屏山输水隧洞中空注浆锚索加固数值模拟研究

Numerical Simulation Study on reinforcement by Hollow Grouting Anchor Cable for Weipingshan Water Conveyance Tunnel

科学合理的加固措施和施工方法对提高地下洞室工程围岩的稳定性,降低施工成本具有重要意义。文章以辽宁省青山水库输水工程围屏山输水隧洞工程为例,提出了中空注浆锚索加固模式,并利用Flac数值模拟方法对中空注浆锚索加固技术进行可行性分析,结果显示中空注浆锚索加固方案相对于普通锚杆加固方案,可以更好控制围岩变形,建议在工程设计中采用。

It is an important significance to improving the stability of surrounding rock and reducing the construction cost of underground caverns to take reinforcement measures and to use construction methods scientifically and reasonably.In this paper,the author,taking Weipingshan water conveyance tunnel project of Qingshan reservoir in Liaoning Province as an example,put forward the reinforcement mode of hollow grouting anchor cable,and carried out the feasibility study on the reinforcement technique by hollow grouting anchor cable by means of Flac numerical simulation.The results show that the reinforcement scheme by hollow grouting anchor cable can better control the deformation of surrounding rock comparing with ordinary anchor bolt reinforcement scheme,which is recommended to be used in the project design.