大渡河上游亚喀则滑坡复活变形机理及发展趋势分析

位于大渡河上游的亚喀则古滑坡，早期为顺层滑动，其变形复活与表水入渗、后缘崩塌加载和河流侵蚀作用密切相关。通过GPS监测和现场调查，发现滑坡变形具有同步性和变形趋势的一致性，不均一性明显，最大位移发生在滑坡前缘，年均位移达1.5 m/a，滑坡后缘为0.25 m/a，滑坡表现为长期缓慢的蠕滑变形，滑坡体上发育的多条纵张、横张与压剪性裂缝，使滑坡部分解体、整体性破坏，预测未来发生高速滑动的可能性不大。

The Revival Mechanism and Devolopment Tendency of Yakaze Landslide in the Upper Reaches of Dadu River

Yakaze landslide locating on the upper reaches of Dadu river is an ancient accumulation landslide that has bedding sided at initial stage. Its revival and deformation mechanism is closely related to surface water infiltration, heap loading on the rear and river erosion. Through GPS monitoring and field in vestigate of the landslide show that the deformation is synchronous, consistent and unequal obviously, the biggest displacement has occurred in front edge of the landslide with an annual displacement of 1.5 m/a, the rear of 0.25 m/a, its deformation shows the characteristics of a long term creep-sliding. There are many vertical, horizontal and shearing pressure crack development, which partly disintegrated landslide and resulted in whole undermining of landslide. Based on the above results we draw a conclusion that a high-speed sliding is unlikely in the future.