Project :
Riverside Utility Tunnel
Project Date:
April 2021
Project Client:
Municipal Infrastructure Authority
Project Type:
Tunnel Waterproofing
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Project Description
This infrastructure project involved the waterproofing of a newly constructed underground utility tunnel located near a riverside. Given the high groundwater pressure and surrounding saturated soil, a robust waterproofing system was critical. A combination of PVC membrane, injection grouting, and external drainage board was implemented to ensure long-term protection against water ingress.
Project Summary
A riverside utility tunnel required durable waterproofing under heavy groundwater conditions. A PVC membrane and injection grouting system were used to seal potential ingress points. The tunnel is now protected against long-term hydrostatic pressure.
Benefits to the User
Important Questions About the Project
Tunnels located below the groundwater table are constantly exposed to hydrostatic pressure, which can lead to water ingress, concrete degradation, and corrosion of reinforcements. Waterproofing protects structural integrity and ensures long-term operational safety.
Tunnels often use PVC or HDPE membranes, injection grouting, bentonite systems, and external drainage sheets. Method selection depends on tunnel type, soil condition, and expected water pressure.
Yes, retroactive tunnel waterproofing is possible through injection systems and localized membrane repairs. However, preventive waterproofing during construction is always more effective and cost-efficient.