Rehabilitation of sewer systems under existing roadways and near existing buildings is a challenge. Some projects cannot be done in a trenchless fashion. When open excavation access is required, just the process of getting to the underground workspace becomes a major problem. Municipalities and property owners do not want large, over-excavated areas. As sewer systems are typically the deepest utility, the question of how to maneuver around shallower electrical, mechanical and telecomm systems becomes a concern. Adjacent property owners do not want other utilities cut or disconnected. Driving sheeting can be an option, but the damage caused by vibrating sheeting into place creates its own set of problems. The risk of severing mismarked lines comes into play, and those damages can be more than just an inconvenience to a property owner. When a city in southern California needed sewer outfall rehabilitation work done 23’ deep, in the middle of a street in a residential area, the contractor was tasked with doing the work without creating other problems discussed before. The specifications allowed for extreme minimal deflection in the shoring system. The 12’ x 12’ x 23’ excavations had to allow for crossing utilities. Conventional trench box or slide rail systems would not accommodate the crossing utilities which resided at much shallower elevations. This session is centered on how the contractor used a relatively new concept in shoring to access the site, meeting the strict deflection tolerances, while allowing the contractor to avoid disruption of crossing utilities. Presenters will also discuss how the contractor dealt with restrictions in the tabulated data. The shoring system used allowed the owner and contractor to work with less disruption, less soil reinstatement, and less paving restoration, all while meeting the engineering criteria and the requirements of OSHA.

CEUs Available

0.1

Publish Year

2021

Runtime

50 min.

Categories

Construction/Project Management,Engineering,Wastewater

Contributor/Source

Bruce Magee

Claim CEUs

Lorem ipsum dolor sit amet consectetur adipiscing elit, mattis condimentum justo velit convallis taciti faucibus, egestas elementum vitae vestibulum cum fames

Learn More

Related Resources

demo placeholder

2022

Example Resource One

CEUs Available: 100

2024

Developing Strategies To Deal With Longer Vehicle Equipment Replacement Lead Times

CEUs Available: .1

2024

Memorials in the Right of Way

CEUs Available: .1