First Direct Pipe Project Completed in Poland
In fall 2016, drilling contractor PPI Chrobok S.A. installed two new gas pipelines in Poland. The alignment runs along existing gas lines and through geologically challenging terrain. With the laying of the 700- and 464-m long pipelines, Herrenknecht‘s Direct Pipe technology was used in Poland for the first time.
With the construction of a new north-south pipeline connection, Poland is reacting to the increasing local demand for gas. Part of this network expansion is the Czeszów-Wierzchowice Gas Pipeline Project in the southwest of the country. So far, only horizontal directional drilling technology had been used for crossing rivers or roads during pipeline projects in Poland. Used for decades, the method has proved its worth for large numbers of boreholes, but it reaches its technical and economic limits in heterogeneous, non-stable grounds.
The sandy, sticky clay of the pipeline crossings in Wierzchowice and Czeszów presented the drilling crew with just such project conditions. Furthermore, the two alignments with lengths of 700 and 464 m, respectively, run along existing gas lines. Uncontrolled deviations during the drilling process thus had to be avoided at all costs. In view of these requirements, main contractor PGNiG Technologies S.A. together with drilling contractor PPI Chrobok S.A. opted for the innovative Direct Pipe technology from Herrenknecht. This method combines the advantages of microtunneling and HDD technology. In a single step, the required borehole is created and the prefabricated pipe is simultaneously installed without a trench.
RELATED: Michels Completes Record Direct Pipe Installation
Overall, a very positive conclusion was drawn after successful completion of the project. With a daily best performance of 147 m, Roland Kośka, Planning & Monitoring Manager for client GAZ-SYSTEM, summed it up as follows: “As a combination of HDD and microtunneling, Direct Pipe overcomes the respective limitations which, to a large extent, are no longer obstacles to pipeline construction. This will also allow us to pursue new projects in the future and complete them economically, quickly and with minimal impact on the local infrastructure and environment.”
RELATED: Herrenknecht TBMs Boring Hong Kong Metro
Comments are closed here.