三峡永久船闸边坡不稳定块体处理

永久船闸开挖基本成形后，由于地质结构特点及地应力释放，经地不确定了１００ｍ＾３以上不稳定块体３１２个，直接影响到船闸直立墙的稳定，为满足直立墙的稳定要求，根据现场情况采取了随机锚索、锚杆等随机支护措施。随机支护的工程量多，面广、时间紧迫、经精心组织及时支护满足了直立墙的稳定要求。

Treatment of Unstable Wedges in Slopes at Permanent Shiplock

After the excavation of the permanent shiplock at Three Gorges Project was basically completed and by the geological mapping 312 unstable wedges, each with a volume of more than 100 m 3, have been identifed, resulting from the geological structure features and relief of ground stress. Those wedges would have directly impact on the stability of the vertical walls of the shiplock. In this case the random support measures such as installation of random cables and bolts were taken. Even though the heavy workload, extensive workface and tight time schedule, the stability requirements were met through care construction arrangement and promptly supporting.