STUDY ON DISTRIBUTION AND SPATIAL CHARACTERISTICS OF HIGH SPEED LANDSLIDES UNDER STRONG EARTHQUAKES

The 512 Wenchuan Earthquake induced a lot of landslidesStudy areas of this paper are several severest disaster counties including Wenchuan，Beichuan，Qingchuan，Anxian，Pingwu，Maoxian，Jiangyou，Pengzhou，Shifang，Mianzhu etcUnder detailed field investigation，distribution and spatial characteristics of typical high speed landslides under the condition of strong earthquakes are analyzed comprehensivelyHigh speed landslides were all located along the Longmen Shan fault zone，and especially controlled by the Beichuan  Yingxiu Fault which is one of the three sub  faults of Longmen Shan faultThere is also another distribution characteristic that high speed landslides were all along the water systemsActive structures have macroscopic control to landslides while water systems have local effect to themFurthermore some spatial characteristics of high speed landslides such as slippage，the distances between the front and the back edge of landslides，height of the landslide shear crack are analyzed in this paper．