Laying concrete at the railway line between Underground 5 and Underground 6 on the Third underground diameter in Sofia has started

"Trace Group Hold“ Plc has started the concreting of the railway road at Underground 6 “Zad Kanala” Small City Theatre, which has recently been called "Тheatrical" The track is already equipped with the so-called boots, informs Dipl. Eng. Petar Tonev and explains: "In this way, a concrete is removed from the sleepers and, in case of breakdowns, they are removed quickly and without disturbing the concrete floor." Surveyors monitor the leveling of the road during the laying of the concrete so that there are no deviations from the design axes. It is expected after a day to start concreting the S-link from Underground 6 to Underground 5 where the trains will pass from one track to the other. At the same time, the activities on the architectural part of Underground 6 are carried out and the structures of Underground 5 are on a way to be completed. The heterogeneous geological conditions and the high groundwater due to the proximity of Underground 6 and Underground 5 to the correction of Perlovska River (the northern entrance of Underground 5 passes under the river and goes on the sidewalk of “Vladimir Vazov” Blvd.) did not prevent the builders from executing construction- installation activities on time.