南湾水库拟建泄洪洞稳定性研究

Study of the Stability of Planned Spillway Tunnel in Nanwan Reservoir

通过对南湾水库拟建泄洪洞和试验洞围岩物理力学性质、岩体强度及变形情况的研究,认为采用试验洞施工方法和经验,开挖5 m的泻洪洞是可行的,且建成后是稳定的。

According to the study of mechanical parameters, strength and deformation characteristics of surrounding rock of the feat tunnel and planned spillway tunel, it is considered that the excavation of the planned spillway tunel with a diameter of five metres is feasible by the use of the construction method and experience,and the spillway tunel will is stable after it is constructcd.