ESSENTIAL ADVANTAGES OF THE WALKABLE CABLE DUCT
In addition to the dominant buried installation of individual pipelines or cable bundles, the multiple installations in an underground structural envelope construction prevent direct contact between the pipeline and the soil, and thus a direct effect of external loads, soil moisture, seepage and groundwater or temperature changes. Such line ducts and
CASE OF APPLICATION
Conduits can be found under inner- or suburban areas as well as in crossings of infrastructure routes or water bodies (conduit culverts). Their advantages come into play when the space-saving line bundling or parallel line routing goes hand in hand with long-term replacement flexibility and durability and resistance are guaranteed for the line installations.
With an economic feasibility study (WIBE), constructional requirements, macroeconomic influences and possible follow-up costs can be examined from an operational, communal, and economic point of view and supplemented with a risk and deficit analysis.
The economic efficiency in the operation of the sewers is usually demonstrated by means of a revenue-expenditure account or cost-unit accounting. Direct and indirect costs or characteristic values are to be considered.
The long-term and sustainable use of conduits is linked to site-specific supply and framework conditions. Conduits fulfil basic and system-specific functions. The equipment required for this is subject to standardised specifications for the operation of the line systems and the safety of persons in the line ducts, e.g. according to the DGUV regulations, in accordance with many years of operating experience in the Federal Republic of Germany.
The structural design and the functional development of the ducts must be designed for a service life of at least 80 years. The construction methods and technologies to be used are based on German and international standards (DIN, EN, ISO). In Germany, a comprehensive set of rules and regulations of the professional associations (e.g. AGFW, DVGW, VDE, DWA, DGUV, RBV) must be used for the laying of pipes.