Temporary Ground Water Drainage

Challenge:

• Construction of a new building starts with foundations often constructed on the right substrate, usually located deep into the ground. 
• The correct substrate needs to be reached first before construction can begin and to reach this firm layer, groundwater needs to be lowered.
• The process of lowering groundwater is an ongoing process until the construction of the foundation is completed.
• Pumping groundwater directly to surface water was not allowed and only possible in consent with local authorities.

Solution:

• A Diesel Pump - 4" was used to extract groundwater / rainwater from the customers drainage system. The customer made sure the pump could not run dry by adding level-float-switches to operate during pumping actions.
• United Rentals 35 m³ Tank was was used to act as a buffer-tank to control the outgoing flow towards rainwater-sewer.
• A Submersible Pump 4” was used to pump out the collected groundwater to a nearby sewer-pit after approval of local authorities.

Benefits:

• United Rentals solution allows the ground water levels to be lowered to the required depth.
• The solution allows control of the outgoing flow, which abides to the local regulations by storing water in the buffer tank.