Learning unit summary:
This course includes tutorial services and a final examination.
Replacement refers to the installation of new sewers and drains in place of existing pipelines, where the new pipeline takes over the functions of the old sewer or drain. The replacement process is subdivided into three methods: “open cut method”, “semi open cut method” and “trenchless method”. The focus of this module is the trenchless replacement method of pipelines by the means of pipe bursting, gallery techniques, and pipe extraction.
In addition to the replacement method and process description this module discusses the areas of application and limits, the advantages and disadvantages as well as possible rehabilitation errors and options for quality assurance.
The course consists of 7 modules:
- Pipe bursting basics
- Pipe bursting
- The welding of plastic pipes
- Pullback of pipelines
- Gallery techniques
- Pipe extraction
- Geotechnical and hydrogeological principles
LEARNING OUTCOMES
- identify and implement the most important rules and specifications;
- identify the replacement methods areas of application, limitations as well as advantages and disadvantages.
- identify possible causes of errors and describe quality assurance measures
- select the appropriate replacement methods based on the type of damage and limiting conditions
- identify influences effecting the extension or reduction of the useful service life of the new pipeline
- identify possible for quality checks and measures for the protection of the new pipeline
- identify the effects of pipe bursting on the surrounding environment and from that calculate the required minimum distances to the adjacent utilities and structures
- identify methods of tensile force control and restriction
- differentiate between soil types, to identify the influence of the grain shape and grain size distribution on the practical construction characteristics of the subsoil, to assess the ground state with respect to its bulk density and consistency and to derive key soil condition indicators;
- identify the different forms of water in the subsurface, to understand the movement of unbound water in the subsoil and to determine the water permeability of the soil for a structural engineering assessment ;
- dimension the pipeline insertion pit; calculate the pulling forces and the maximum bending radii of the pipeline.
- classify plastics in relation to their weldability in thermoplastics, elastomers and thermosets
- identify the influence of the density (crystallinity) of thermoplastics in terms of strength, stiffness, chemical resistance and impact strength.
- identify properties of polyethylene, and the advantages resulting therefrom
- differentiate between the various welding processes and to identify their areas of application
- identify the factors effecting the weld quality and their consequences
- identify possible errors during welding and understand their consequences on the quality
800.00 USD exclusive of VAT / 2016