Road roller for constructional engineering

The invention relates to the technical field of road rollers, and particularly discloses a road roller for constructional engineering, which comprises a frame and a runner wheel, support arms are arranged on two sides of the runner wheel, scrapers are arranged on the support arms, the support arms are fixedly connected with a roll shaft, the roll shaft penetrates through the runner wheel and is rotatably connected with the runner wheel, a groove is formed in the working surface of the runner wheel along the direction perpendicular to the axis, and the runner wheel is fixedly connected with the groove. A groove is formed in the roller shaft, a protruding block is connected into the groove in a sliding mode, a cam is arranged in the grinding wheel and fixedly connected with the roller shaft, the shape of the top of the protruding block is the same as that of the working face of the grinding wheel, the bottom of the protruding block is fixedly connected with a connecting rod driven piece matched with the cam, an