Measurement of underground structures, in particular for underground tunnelling, having change plates

摘要

The system has a tubing extension or a tunneling device moved through an underground. An underground structure and/or a position of the tunneling device are measured. Temporary eccentric clamps (90) are arranged on a structural floor. Measuring devices (91, 92) e.g. prisms, are aligned on the eccentric clamps in a contactless manner. The tubing extension is provided for tunneling control during structure construction. The eccentric clamps are used with measuring points for parallel measuring sections. A suspension of the eccentric clamps is provided in preset measuring points.