| 摘要 |
<p>In a double-tube type boring and kneading machine comprising a double tubular shaft assembly (1) composed of both an outer tubular shaft (2) and an inner shaft (4) separately rotatable to each other, said outer tubular shaft (2) is adapted to be rotated at a high speed and provided at its external surface with a stirring and kneading means (3), and said inner shaft (4) is adapted to be rotated with a large torque and provided with a boring bit (5) at its leading end, a lower stirring and kneading means (3') and a liquid discharge port (6). A method for improving a foundation ground by employing a double-tube type boring and kneading machine is also disclosed herein. <IMAGE></p> |
