Steel support structure

The utility model discloses a steel support structure, and relates to the field of constructional engineering. The steel supporting structure comprises a supporting rod system and triangular steel brackets, the triangular steel brackets are arranged on two opposite continuous walls of a foundation pit, and the supporting rod system is horizontally placed on the triangular steel brackets; the supporting rod system comprises a movable end, a main body rod and a fixed end, and the movable end and the fixed end are fixedly connected with the main body rod respectively; wherein the main body rod isformed by connecting a plurality of sections of steel pipes through flange plates; the movable end is composed of a movable end head and a movable end containing steel pipe, the movable end head is formed by welding an end head steel plate and a channel steel telescopic rod, and the channel steel telescopic rod is arranged in the movable end containing steel pipe matched with the channel steel telescopic rod. A steel wed