Underground works steel -pipe column pilework

The utility model relates to an underground works steel -pipe column pilework. It is pour in and is equipped with little expansion concrete layer including setting up the steel reinforcement cage in stake hole bottom portion, and the little expansion concrete in situ on steel reinforcement cage upper portion is buried underground to the lower part of steel -pipe column, setting for highly welding shutoff board in steel -pipe column bottom and bottom top, building between the shutoff board and be provided with little expansion concrete short column, the shutoff board center at interface is fixed with and takes cross wire reflective sticker on the concrete short column, the fixed steel that is provided with protects a section of thick bamboo in the steel reinforcement cage outside that lies in the steel -pipe column lower part, installs 4 pressure jack of evenly distributed on the steel protects a section of thick bamboo in the circumference, and hydraulic jack's jack -up orientation and steel -pipe column axia