Trenchless pipe installation
SIMONA® Solutions tailored to any application
Trenchless installation of plastic pipelines offers a number of financial and ecological advantages:
- Minimal adverse effect on developed and paved surface
- Use of existing pipeline routes
- Minor inconvenience for residents
- Shorter construction time
- Lower civil engineering and recultivation costs
- Installation possible under rivers, lakes or traffic routes
- Reduction in CO2 emissions, as no vehicles are needed for transport of road surface materials, excavation work, etc.
- Avoidance of traffic rerouting and congestion
Efficient and ecologically sound – Trenchless pipe laying
Ploughing (fig. 1)
Ploughing is the fast and possibly most cost-effective method of laying new plastic pipes. The technique used has a minimal impact on the subsoil and is therefore considered to be environmentally friendly. A winch is used to pull a plough blade and pipe-laying unit through the ground. Once the pipe has been installed, the furrow (trench) is automatically closed as the plough blade advances. This method is also suitable for the parallel installation of several pipelines. As the soil initially displaced by the plough is re-used without any further processing, the pipes deployed have to be highly resistant to point, i.e. concentrated, loads. Owing to their high stress crack resistance, SIMONA ® PE 100 RC pipes are particularly durable.
Recommendation for pressure piping systems: SIMONA® PE 100 RC-Line
Horizontal drilling (fig. 2)
Soil is loosened and flushed out in various stages using a drilling fluid. The first step is to create a pipe duct by means of a pilot bore. Then, in further steps the final pipe duct is widened and the pipe is introduced with the help of an insertion device.
Recommendation for pressure piping systems: SIMONA® PE 100 SPC RC-Line / SIMONA® PE 100 RC-Line
(depending on soil conditions)
Safe and effective – Trenchless pipe replacement
Relining (long pipe) (fig. 1)
In the case of relining, a new solid-wall pipe is inserted into the damaged existing pipe. The result is a fully operational piping system that is comparable to a newly installed pipe and is thus subject to the same accounting standards as a new system. It is essential that pipes installed by means of relining are assessed thoroughly in terms of their hydraulic properties because the circumference of the new pipe will be smaller than that of the old one. Additionally, high-strength pipe joints are considered a prerequisite for successful relining (e.g. SIMOFUSE® joining method).
Recommendation for non-pressurepiping systems: SIMONA® PE CoEx sewer pipes with SIMOFUSE® joining technology
Recommendation for pressure piping systems: SIMONA® PE 100 pressure pipes
Relining (short pipe) (fig. 2)
In the case of limited space or access, relining with short pipe segments is the most effective method of pipeline rehabilitation. Short pipe modules with a length of 0.6 to 2.0 metres ensure simple handling, thus facilitating installation. The individual sections are welded together and inserted stepby-step into the damaged pipe. Using the SIMOFUSE® method, which relies on integral electrofusion spirals, pipe sections can be joined together quickly and with leak-proof tightness.
Recommendation for non-pressurepiping systems: SIMONA® PE CoEx short pipe modules with SIMOFUSE® joining technology
Swagelining (fig. 3)
As in the case of relining, swagelining is a particular fast way of in serting a new pipe into an existing system. During insertion the pipe is pulled through a reduction device that temporarily reduces its diameter. This allows the pipe to be pulled through the existing pipeline. After the pipe has been pulled completely through the pipe, the pulling force is removed and the pipe returns toward its original diameter until it presses tightly against the inside wall of the host pipe. The tight-fitting liner results in a flow capacity close to the original pipeline design (close fit).
Recommendation for pressure piping systems: SIMONA® PE 100 pressure pipes in special sizes Swagelining
Burstlining (fig. 4)
Burstlining, a trenchless pipe-bursting method, is used for repairing damaged pipelines by retaining or enlarging the hydraulic cross-section. Together with the in-situ soil, the broken material compacted into the ground forms an annular space, into which the new pipeline attached to the bursting unit is introduced.
Recommendation for pressure piping systems: SIMONA® PE 100 SPC RC-Line