摘要
通过描述金瓜山隧道地层岩性、围岩结构、偏压应力方向和现场围岩变形累积发展趋势特点,说明隧道洞室在埋深小于或远小于现行规范临界埋深条件下,若多项不利因素迭加和变形趋势累积到一定程度,同样会导致较严重的岩爆发生可能。合理解释了金瓜山隧道强烈岩爆与埋深较小之间的理论矛盾存在的原因。
The stratum lithology,surrounding rock structure,asymmetrical load direction and features of the accumulation and development of the deformation of the surrounding rock mass of Jinguashan tunnel are described.In case several unfavorable factors occur at the same time and the deformation accumulates to a certain level,serious rock burst may occur,even if the depth of the cover of the tunnel is far less than the limit value specified in the current standards.The causes for the rock burst occurring in the construction of Jinguashan tunnel,which has shallow cover,are explained.
出处
《隧道建设》
2011年第4期479-483,共5页
Tunnel Construction
关键词
金瓜山隧道
岩爆
偏压
Jinguashan tunnel
rock burst
asymmetrical load
