论三峡库区不稳定岸坡的治理目标和设计原则

三峡库区不稳定或潜在不稳定边坡大部分属于堆积体边坡，水库蓄水后可能发生变形、坝岸和滑坡。城镇区边坡治理目标是控制极限变形，治理难度大，应做效率与投资分析，制定现实可行的设计方案；非城镇区边坡应对其失衡形式和失稳风险做分析，以抵消蓄水效应，保持原有稳定状态原则作决策依据，以地表和地下排水作为首选治理方案。

On treatment targets and design principle for destabilized bank slopes of the Three Gorges reservoir

Most of destabilized or potentially destabilized bank slopes in the Three Gorges reservoir area are of accumulative formation and deformation, bank collapse and landslide may occur after reservoir filling. In urban areas, the target of slope treatment is to control the limit deformation. It is difficult to do so and benefit and investment analysis should be carried out and a practical design scheme should be worked out. In non-urban areas, analysis should be conducted on instability mode and risks so as to balance the effect of reservoir filling. The principle of keeping the original stabilized condition is the basis of decision-making and surface and ground water drainage is the first choice scheme.