It is found that the deformation of landslide starts from the bottom wall(main sliding face of sliding zone),and the development of deformation is progressive from the bottom wall up to the top wall.
发现滑坡的变形起源于滑带的主滑面;然后自下(盘)而上(盘)依次缓慢发展,滑带中的各点自变形启动到变形峰值历时13～28月不等。