Numerical analysis of the blasting excavation of tunnels with soil-rock interfaces
Numerical analysis of the blasting excavation of tunnels with soil-rock interfaces
复制标题
土石界面隧道爆破开挖数值分析
DOI：
--
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Wu, Shun-Chuan1
中科院分区：
文献类型：
--
作者：
Liu, Yang1;Zhao, Xue-Tong1;Wu, Shun-Chuan1
利用FLAC3D对黑山隧道爆破开挖过程中的爆破震动效应进行了数值分析。在分析过程中，采用球面爆炸波方法对爆破开挖过程进行了模拟。根据数值结果，提出了炸药的安全装药量，并对其在爆破控制中的应用进行了分析。结果表明，拱顶和拱腰底部的应力发生了重分布。拱顶土层对爆破振动比较敏感。虽然塑性破坏主要发生在隧道的拱顶，与岩石相连的中心土层也有一定的破坏。它们不会影响隧道的整体稳定性。
The effect of blasting vibration on Heishan tunnel with soil-rock interfaces was numerically analyzed with FLAC3D when the tunnel was excavated by blasting excavation.In the analysis the blasting excavation was simulated by a method of spherical blast waves.According to the numerical result,the safe charge of explosives was proposed and its application was analyzed in the blasting control.It is indicated that that the stress is redistributed at the vault and the bottoms of the arch waist.Soil zones in the vault are sensitive to blasting vibration.Although plastic failure develops mainly in the vault of the tunnel and there are also some damages in the center soil connecting with rock,they do not affect the overall stability of the tunnel.