Application of Full-rotation Complete Tube Technology in the Construction of Pile Foundation in Medium-coarse Sand Geology

Abstract

The full-rotation complete tube technology is to drive the flower tube and the steel casing to be fastened by connecting pins, drive the steel casing to rotate 360 degrees, and apply torque and vertical load to the steel casing in the hole, with the help of the steel casing pipe to cut and drill the boulder and medium-coarse sandstone layer with strong force, make full use of the role of the steel casing to protect the wall, and then use the auger and sand drill to grab the confined water and the soil in the steel casing, and then clear thelobstacles inside of the steel casing. Controlling the slump of concrete and the amount of concrete poured each time can more effectively control the construction quality, which has obvious effects on speeding up the construction progress and improving efficiency, and at the same time avoiding environmental pollution.