崩滑灾害临界位移演化的指数律

基于锁固段概念和重正化群理论,从新的思路和视角出发,提出崩滑灾害临界位移演化的2个指数律,发现斜坡失稳的临界位移与加速蠕变起点的位移和锁固段的个数有关。第一律适用于斜坡的脆性破坏分析,例如岩崩、滚石和岩体倾倒破坏;第二律适用于斜坡的蠕变破坏分析预测,例如岩滑、堆积层滑坡、黄土滑坡以及含锁固段的黏土滑坡。多个典型滑坡实例分析表明上述指数律的广泛适用性与可应用性。所提出的方法能够在崩滑灾害的中期、短期及临阵预报方面发挥作用。

EXPONENTIAL LAWS OF CRITICAL DISPLACEMENT EVOLUTION OR LANDSLIDES AND AVALANCHES

Two universal exponential laws for critical displacement evolution of landslides and avalanches are put forward according to the locked patch concept and renormalization group theory in a new viewpoint. It is found that the critical instability displacement of slopes has a dependency on the displacement at the onset point of accelerating creep and the number of locked patches. The first law is suitable for the analysis of brittle failure of slopes，such as rock avalanches，rock-falls and rock toppling failures. The second law can be applied to the prediction of creep failure，such as rockslides，colluvial-deposit landslides and loess landslides as well as clay landslides with locked patches. The two laws have wide suitability and applicability by analyzing a few typical examples of landslides and avalanches. The suggested method could be hopefully applied to the medium-term，short-term and critical-sliding prediction of landslides and avalanches in the future.