中文摘要：

为揭示隧道掘进过程中对上覆岩体边坡的影响,建立模型模拟隧道掘进过程中隧道上覆坡体的变形移动规律。在此基础上提出管棚预注浆T字梁支护结构,控制易塌陷坡体移动变形,对该结构存在与不存在两种情况下,对隧道上覆坡体稳定性进行模拟,分析观察隧道上覆岩体边坡中产生失稳滑塌机制,论证该加固措施是否有效。结果表明,管棚预注浆T字梁支护结构能有效控制易塌陷坡体滑移及应力变化对隧道挤压破坏的影响,有效地缓解了掘进隧道过程中坡体的不稳定性。

英文摘要：

In order to reveal the influence of the tunnel during excavation of the overlying rock slope,numerical model is established to simulate the deformation movement law of the tunnel slope during excavation.On this basis it is proposed pre-grouting pipe roof T-beam support structure to control collapse slope movement and deformation,and when under two scenarios with and without this kind of structure,overlying slope stability is stimulated.Generated sliding mechanism is observed and the effectiveness of the reinforcement measures is demonstrated.The results show that pre-grouting T-beam supporting structure can effectively control the slip of slope and impact of stress change on the tunnel due to squeeze and compression,and can effectively mitigate the instability of slope during tunnel excavation.