Laguna Beach Rehab Tunnel - Solutions for Unique Tunnel Rehabilitation Challenges

摘要

A 66-year-old deteriorating sewer tunnel located beneath coastal cliffs and landslide slumps in Laguna Beach, California is in need of rehabilitation and sewer pipe replacement. Since construction, the environmentally sensitive project area has grown with multimillion-dollar homes and heavy tourist activity that, along with incomplete historical records, add unique geotechnical, environmental and public relations challenges to the rehabilitation process. This paper presents the improved methods used for stabilizing and rehabilitating the existing sewer tunnel, and discusses the experiments and tools developed and employed by the project team for addressing variable and unexpected conditions, increasing productivity and shortening construction duration.