Foundation ditch with concealed columns and soil-nailing support

The utility model relates to a foundation ditch with concealed columns and soil-nailing support, which aims at solving the problems that the displacement of the foundation ditch side slope top is large and the supporting force of the soil-nailing wall panel is weak when the foundation ditch is dug in the soft soil area of the urban area, and comprises a ditch body which is dug on a foundation andis surrounded by side slopes, wherein concealed columns are arranged on the side slope body in the longitudinal direction, and concrete nails are arranged on the side slopes in the transverse direction; the concealed columns are of a perforated mudjack pile, and the perforated mudjack pile is formed by throwing break stones into a reinforcing steel bar cage and then pressing in cement grout; the reinforcing steel bar cage adopts a threaded reinforcing steel bar as a main bar, reinforced bars are arranged along the length direction, and a helical hoop bar is arranged outside the main bar; the top part of the concealed column is provided with a crown beam; a rod body of the concrete snail adopts a steel pipe which is divided into three sections; the front end which is one third of the steelpipe and the middle part which is one third of the steel pipe are respectively and fixedly connected with a threaded steel to be used as an agnail, and a grout filling eye is drilled on the front end;and the agnail is arranged in a helical way. The foundation ditch is applicable to the support of the foundation ditch which is formed and dug on the soft soil stratum in the urban area.