Reconstruction of Fabryczna Street in Leszno, Poland
Corrugated steel retention tanks collect excess rainwater and expel to sewage system
The challenge
As part of the reconstruction project for Fabryczna Street in Leszno, western Poland, a solution for water retention and release was needed. Collecting excess water to keep the surface area free meant bringing in a retention tank solution that could capture and release storm water into the sewage system.
The solution
A corrugated steel retention tank system consisting of two retention tanks was built into the existing sewage system at Fabryczna Street. The tanks are placed in a car-free green zone, and the tank solution gradually releases excess stormwater into the sewage system. Installed gradually over a three-month period, the retention tank solution is one of the largest-capacity retention tank projects ViaCon Polska has delivered.
The ViaCon advantage
The water tank solution offers a number of benefits:
• Faster installation than alternatives
• Cost effective: Short construction time and easier maintenance reduces overall costs
• Sustainable steel solution
• Flexible build: System built under a road, car park or car-free zone and multiple, customizable arrangements for tanks and their capacity and capabilities
Technical specifications
The two-tank system included specific design requirements and assumptions:
• Two retention tanks:
o Tank 1: DN/ID 1,400 mm
o Tank 2: DN/ID 1,500 mm
• Anti-corrosion with 42 µm thick zinc coating and polymeric WProtect coating of min 250 µm on both sides
Tank 1 has a total capacity of 676.4 m3 with an inner diameter of 1,400 mm. Three pipes are arranged in parallel, each 142 m long for a total length of 426 m.
Tank 2 has a total capacity of 382.9 m3 with an inner diameter of 1,500 mm. Two pipes are arranged in parallel, each 108.4 m long for a total length of 216.8 m.