As part of the project "Construction of the S6 expressway Słupsk -Gdańsk", using the MTM 1200 system, a sanitary installation was implemented - connections to street inlets - drainage of the Wielki Kack junction.
The installation consisted of several sections of pipes with a length of over a dozen to several dozen meters each, made of PP segmented pipes ∅225x13.8 mm, installed with a 1% slope. The diagram below shows a fragment of the project of this installation.
The existing DN 1200 sewage chambers had to be connected to the existing sewage system. The Gravitational Drilling Rig MTM 1200 is the only available technology that enables the fully trenchless implementation of this construction in this site. At one end of the installation, there were existing sewage wells, and on the other, a very narrow lane separating the two dual carriageways, which are part of the Tricity Beltway.
The Gravity Drilling Rig was installed in the starting well. A pilot drilling was made from it to the final excavation, situated on the lane separating the roadways.
Then a sewage pipe was built from the tubular modules, which was pulled from the technical final excavation to the starting well.
The construction site related to the project was located in the area of the busy Tri-City Ring Road. The use of any other technology limiting or excluding this communication thread was not an option. The Gravity Drilling Technology has been developed for such works, so that in such and similar places it is possible to perform the installations fully trenchlessly, without interfering with the existing infrastructure and without the need to block traffic.
