We have resumed work on the construction of the “Polsadu Roundabout” underground stop. More specifically – we have returned to the stage of slurry wall deepening. A new deepening machine named “Lucjan” has entered the construction site.  

Once the site preparation for the tunnel is completed, the process of slurry wall sinking begins. Slurry walls are reinforced concrete structures made in narrow slots in the ground, serving as the structural casing of the tunnel. These walls not only minimize the impact of the excavation on the surrounding area, but also take the pressure of the soil and groundwater. The excavation will extend more than 20 meters into the ground.

The design of the diaphragm walls makes it possible to effectively transfer significant loads, which affects the stability of the entire structure. This acts not only as a technical safeguard, but also as an element that minimizes disturbance in the vicinity of the structure. 

During the construction of diaphragm walls, it is necessary to perform them continuously, which includes night work. An uninterrupted concreting process is crucial to achieving optimal results. The method of work used does not leave the possibility of interrupting concreting, and the occurrence of such an interruption can result in serious and permanent defects in the structure and make it impossible to ensure high quality work. However, we want to ensure that the most onerous work – that is, slurry wall sinking is performed during the day.