River traversals in Stettin mastered by Tracto
In the heart of Poland, Szczecin, the seventh-largest city with nearly 400,000 inhabitants and a significant Baltic Sea port, has recently undergone a remarkable transformation. The expansion of its fiber optic network was accomplished using trenchless technology, minimizing disruption and costs.
The project, entrusted to the experienced construction and engineering company Hydropex, was challenging due to the city's unique geography. Divided into different parts by several arms of the Oder River, with some parts of the city located on river islands, the task was not an easy one.
To avoid the disruption, cost, and time-consuming nature of open construction methods, the trenchless method was necessary. This innovative approach allowed for the efficient crossing of three inner-city river arms: the Western Oder for a length of 231 meters, the Parnica Canal over 210 meters, and the Regalica River for a length of 426 meters.
The 231-meter-long crossing of the Western Oder was carried out in July 2024 using a radio locating system. Hydropex, using their own radio navigation system, arranged for ships traffic to be shut down during the test. A 200-meter-long rope was stretched from bank to bank for improved control during the test drilling.
The third tunnel under the Regalica River, a part of this project, is the longest in Hydropex's history. The team, aided by the automation of the entire drilling process, encountered uneven geological conditions, including sandy and sandy-silty soils, sometimes with a peat content, as well as moraine soils.
The project involved the construction of a telecommunications distribution network in the form of a fiber optic main cable that ran through heavily built-up districts of Szczecin for a total length of 11,290 meters. All three boreholes were carried out using the controlled horizontal drilling (HDD) method with a GRUNDODRILL 28Nplus from Tracto.
The GRUNDODRILL 28N Plus performed well, with a 280 kN pulling and feeding force and infinitely variable torque control from the Cummins Tier V engine. The recording of all drilling data was a positive aspect, according to Tracto.
Hydropex was able to complete each tunnel in an average of two weeks with a crew of 6 to 9 employees. The operator could fully focus on the set parameters and adjust them during operation using potentiometers. The project was completed in a remarkably short time using the Grundodrill 28Nplus from Tracto.
According to Tracto, the expansion of the fiber optic network in Szczecin could be achieved cost-effectively and with minimal disruption using trenchless technology. This innovative approach is set to revolutionize infrastructure projects in urban environments, offering a more sustainable and less disruptive solution for the future.
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