A foundation pit supporting structure with long spiral pressure grouting mortar pile and inserted steel

Abstract

The utility model discloses a kind of foundation pit support structures of long spiral pressure grouting mortar pile inner inserted section steel, belong to building construction technical field, including long spiral pressure grouting mortar pile structure, the long spiral pressure grouting mortar pile structure includes long spiral drill rod, the long spiral drill rod outer wall is equipped with spiral blade, drill bit is installed at the long spiral drill rod bottom, grouting pipe is equipped in the long spiral drill rod, force retaining member is installed in the long spiral drill rod inside center, the force retaining member includes H-shaped steel and pile top corbel, and the pile top corbel top is connected with connecting piece. By comprehensive design a kind of long spiral drill hole pile foundation, first by long spiral drill rod to hole to bottom, cooperate internal grouting pipe and press grouting low-grade mortar at hole bottom, by mixing into certain proportion of bentonite in mortar, grouting work is carried out when punching work, mud is transported outside construction speed is fast, to improve work efficiency.

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