TRENCHLESS TRANSFORMATION

摘要

To repair a major sewer pipeline in a politically and environmentally acceptable way, the Massachusetts Water Resources Authority chose a cured-in-place liner system. A young boy is cutting the grass in his backyard near a fence that abuts a sewer easement. He feels a ground tremor and backs away from the fence, just in time to see part of it disappear into a 16 ft (5 m) deep hole in the ground. It sounds like fiction, but this incident actually happened— and propelled a sewer pipeline rehabilitation project to the top of the Massachusetts Water Resources Authority's priority list.