三峡永久船闸高边坡开挖中的岩石力学问题

 三峡永久船闸是深切山体建造的，开挖形成了双向岩石高陡边坡，其规模巨大,由此带来的边坡稳定问题引起世人普遍关注。回顾高边坡施工开挖6年中发生的边坡成型困难、岩体开裂和塌方等情况，及研究采取对策、解决问题的过程,对岩体开裂和塌方等问题的原因进行了岩石力学分析，提出了几点经验，可供其它类似工程参考。

Rock mechanics problems in excavation process of TGP permanent lock's high slope

The Three Gorges Project permanent lock is constructed by deeply cutting off the rock mass in mountain.The high and steep rock slopes of both sides were formed.The maximum excavated depth reaches about 170 m.In view of their enormous scale,the slope stability problems attract wide attention in the engineering society.This paper gives a brief review on the problems occurring during the lock evcavation in 6 years,such as the difficulty in keeping the designed configurations of the slopes in blasting,rock cracking,collapse and rock block sliding etc..To solve these problems a serries of investigations and discussions have been conducte and remedial measures adopted.Based on the above mentioned,in this article an overall analysis on the causes and mechanisms of these problems is performed.Some understandings and experience are outlined as referenec for other similar rock projects.