熊渡隧道围岩稳定性研究

Study on the stability of surrounding rock of Xiongdu tunnel

结合熊渡隧道的工程实践,通过拱顶沉降、锚杆应力的现场监控量测和数值计算工作,研究了复杂地质条件下岩溶隧道全断面爆破开挖时围岩的稳定性,研究结果表明,熊渡隧道Ⅴ级围岩段的破碎带采用现有的施工工艺和支护参数是可行的,围岩变形可控,支护结构的支护效果显著,围岩基本稳定。

The research on the stability of wall rock will be carried out during the construction,as whole section excavation of karst tunnels,under complex geological condition,through the on-site supervision measure of vault settlement,stress of bolt and numerical simulation in combination with the engineering practice of Xiongdu tunnels.The research result indicates the feasibility of existing construction technology and retaining parameter adopted for fault zone of V-grade wall rock section of Xiongdu tunnels because of controllable wall rock distortion,strong retaining structure,safe storage and stable wall rock.