Force Characteristics of Double-row Anti-slide Pile in Liujiapo Landslide

The Liujiapo No. 2 landslide in Langao County has large thrust and scale, so the single-row pile or general retaining structure cannot meet the demand of anti-sliding force when the thrust of the landslide achieves 2000KN/m. It is also difficult to accomplish the construction under the tough topographic conditions and limited land acquisition in the Liujiapo No. 2 landslide. But the double-row anti-slide pile has many benfits of large stiffness, wonderful stability and favorable stress, which is commendably fulfilled the demand of anti-sliding force. In order to study the magnitude of landslide thrust shared by two rows of anti-slide piles in Liujiapo 2 landslide in Langao county, the each force of double-row anti-slide piles has been analyzed separately, and the calculation formula of pile body deformation thrust has been deduced for the elastic foundation beam. The Midas/GTS has been used to analyze the two-dimensional pile under the control of double-row piles, and then the line charts of shear force and the bending moment of landslide anti-slide pile have been obtained. The study not only shows that the shearing force of anti-slide pile is greatest at sliding surface and middle of anchorage section, but also that the back piles bears more landslide thrust than the front ones, which provides reference for the calculation of the reinforcement of anti-slide piles on landslides.