| 摘要 |
An apparatus and method for centrally installing a shoring column into a predrilled hole includes a ring-shaped supporting structure which fits into the hole and includes a central opening large enough for the column. Clamp elements attached to the supporting structure clamp the column. A plurality of centralizing piston and cylinder units attached to the supporting ring extend outwardly to engage the side of the ground hole to centralize the support structure and column in the hole. The elements associated with the supporting structure are controlled remotely from control elements located at ground level outside of the ground hole. |
