摘要
根据李家冲隧道的地质情况,采用FLAC3D软件对软弱围岩条件下隧道的注浆效果进行了研究。分析了注浆前后围岩塑性区的变化情况及隧道施工过程中围岩深部移位元随时间的变化情况。数值分析和实际监测的结果皆表明:围岩预注浆能缩小塑性区范围,改善围岩的物理力学性质,可以有效控制围岩的深部位移,且两者结果相差不大。说明可以运用FLAC3D软件对隧道围岩注浆效果进行分析研究。
According to the geological situation of Lijiachong tunnel, the paper studied the grouting effect of tunnel with soft and weak surrounding rock by use of FLAC^3D software, analyzed the change of plastic zones of surrounding rock before and after grouting and the change of deep displacements with time during the construction of tunnel. The results indicated that pre - grouting can narrow the range of plastic zone, improve the physical and mechanical properties of surrounding rock and also effectively control the deep displacements of surrounding rock. The difference of the results gotten by numerical analysis and practical monitoring is not great. The FLAC^3D software can be used to study the grouting effect of surrounding rock.
出处
《水资源与水工程学报》
2013年第5期201-205,共5页
Journal of Water Resources and Water Engineering
关键词
隧道
注浆
塑性区
深部位移
数值模拟
tunnel
grouting
plastic zone
deep displacement
numerical simulation
