Landslide prevention and control construction single body and system, design method and construction method

The invention discloses a landslide prevention and control construction single body and system, a design method and a construction method, aims to solve prevention and control problem of a high, steep, ultra-thick landslide body. The landslide prevention and control construction single body is arranged in the front 1/3 range of the landslide body and comprises an inlet adit and a side wing adit which are perpendicular to each other to form a T-shaped plane, an opening of the inlet adit is formed in the slope surface and horizontally extends into the landslide body to a sliding surface, and thetail end of the inlet adit is connected with the side wing adit; and minitype steel pipe group piles are arranged in the side wing adit, wherein the minitype steel pipe group piles extend upwards into the landslide body and extend downwards into the landslide body below the sliding surface. The construction single body can be expanded into the landslide prevention and control construction system.The invention further pro