It advances structure to contain notched box culvert top

The utility model discloses an it advances structure to contain notched box culvert top. Wherein: turn right from a left side and link to each other with first box culvert knee wall's one end, second box culvert knee wall's one end in proper order in one side of box culvert roof, the remaining one end of first box culvert knee wall all is provided with an arc iron sheet respectively with the remaining one end of second box culvert knee wall, first box culvert knee wall be equipped with the one end of arc iron sheet, one end that second box culvert knee wall was equipped with the arc iron sheet respectively with first recess, second recess sliding connection. Need filling talcum or other some media of reducing friction between box culvert and the slide, but after the filling medium, influencing the plane degree of slide easily, influence the propulsion of box culvert, the propulsion of box culvert is usually because the deviation appears removing in the skewness of the thrust of jack in addition, precision tha