Case Study
Mitigating Subsurface Infiltration in a Municipal Main: Trenchless Rehabilitation of Roadway Sinkhole Failure
The municipality is experiencing groundwater infiltration into a sanitary sewer main located beneath a high-traffic roadway, resulting in the development of a sinkhole. Due to roadway’s heavy usage and the associated disruption risks, traditional excavation methods are not a viable solution.
Began with thorough cleaning and a CCTV inspection of the host pipe to remove debris, identify infiltration points, and assess structural deficiencies. A custom NuFlow-designed, resin-saturated liner—engineered for large-diameter applications—was then installed using the pull-in-place method. The liner was specifically designed to accommodate active flow conditions through the use of a flow-through system, which maintains service during installation.
To address the infiltration and resulting sinkhole beneath the roadway, a trenchless rehabilitation approach utilizing a large-diameter, flow-through cured-in-place pipe lining system is recommended. This method allows for the structural renewal of the existing sewer main while maintaining continuous system operations, eliminating the need for excavation and minimizing disruption to traffic and surrounding infrastructure.
This new structural liner effectively sealed all infiltration points, restored pipe integrity, and mitigated the risk of further soil loss contributing to sinkhole formation. This solution provides a long-term, cost-effective rehabilitation with minimal surface disruption, making it ideal for critical infrastructure located beneath heavily trafficked roadways.
Damaged pipes and leaks don't fix themselves. Get started today.
%402x.svg){kind=icon}