Sustainable Rehabilitation of Supply Pipelines applying Trenchless Replacement (Static Pipe Bursting) or Close-fit Lining (Pipe Reduction) methods
Leaking oil, gas or water pressure pipelines force utility companies to decide whether to repair, renovate or replace the defective pipes. The main decisive factors are the degree and type of damage, the sustainability of the method and the resulting rehabilitation cost. Modern trenchless pipeline rehabilitation techniques minimize traffic disruption, noise emission loads, dust and surface disruption, danger of damages to existing pipes and cables, intervention in ground water and soil, storage and transportation of the excavated soil. The choice of techniques ranges from punctual repair over partial renovation to complete renewal of the defective pipeline. Static pipe bursting with GRUNDOBURST is an approved method for trenchless pipe replacement. The old pipe (from ND 50 on) is destroyed underground and the new pipe, often of larger diameter, is pulled in simultaneously. With the static pipe bursting method gas and water pipes (pressure pipes) as well as sewage pipes can be replaced. New pipes of almost any material (plastic pipes or metal) can be installed. Daily capacities of 150 – 300 m are possible. Due to its high pulling force being optimally transferred, the GRUNDOBURST system can also be used for the renewal of pipes applying close-fit lining techniques such as the pipe reduction method. Using several practical examples of pipeline rehabilitation projects in Europe, the static pipe bursting technique and the pipe reduction method are described in detail including some video sequences.