Sewer cleaning and TV inspection of sections and connection lines in the years 2021 and 2022, section inspection with Panoramo spherical scanner (4K), connection line inspection with automatic course measurement.

scope

The gravity canals to be examined for the year 2021 have been determined. For 2022 it is assumed that the study lengths will be similar. The following measures for sewer cleaning and TV inspection in 2021 and 2022 (half of each) are the subject of the tender:

- Approx. 50 km sections,

- approx. 6,000 connecting cables, including approx. 5,400.

Lines connected to reaches and around 600 lines to manholes. With an estimated average length of around 5 meters per connection line, this results in a total of 30 km of connection lines to be examined.

As a working basis, the contractor receives an extract from the official real estate cadastre information system (ALKIS) and the master and inspection data in the ISYBAU exchange format (XML-2013) digital as well as work plans in duplicate on paper.

After previous high-pressure cleaning, the postures are to be examined with a spherical scanner with a 4K resolution (3840 x 1920 pixels). After prior / separate high-pressure cleaning, the connection lines are to be examined with the aid of a satellite camera. At the same time, the course of the line (x, y, z coordinate) should be recorded automatically (satellite camera with 3D course measurement, e.g. 3D Geosense technology).