Complex dewatering – Otwock railway crossing

Case:

Trench dewatering for the construction of a subway within the route of the modernised railway line No. 7 on the section between Otwock and Pilawa for the Client – Budimex. For the above task, Renta Pumps provided delivery of trench dewatering equipment with comprehensive installation.

RENTA PUMPS solution

For the dewatering of the trench for the subway, 4 internal combustion piston pumps with a capacity of approximately 90m3/h each were used, positioned at the bottom of the 12m-deep trench, which discharged the water into an intermediate tank with a capacity of 23m3, and then a rotary pump with a capacity of 475m3/h was used to pump the water out of the trench over a distance of approximately 500m via a 200mm diameter pipeline. To ensure that the dewatering was continuous and trouble-free, a submersible backup pump with a capacity of 376 m3/h was also used to discharge the water from the reservoir. Due to the very high groundwater inflows, needle filters with a diameter of 50mm, 230 pcs, were used. The above solution was designed to allow water to be dewatered and drained from a depth of more than 15m, which allowed the client to complete the construction work within the planned timeframe.