Segmental Placement of Renton Outfall: Construction Innovation

Abstract
The installation of the outfall pipeline for the Renton Effluent Transfer System presented challenges and resulted in construction innovation. Introduction of new equipment (a deepwater minisubmarine and a remotely controlled bolt‐up tool) and modification of the method of construction enabled the contractor to place large‐diameter pipe in water depths unattainable using existing construction methods. This paper describes the construction project, reviews the technology for the installation of offshore pipelines, and analyzes the process leading to product and process innovation. It compares this process with a model of innovation on the construction project and develops conclusions and practical applications based on this example of construction innovation. These conclusions emphasize the role of the owner and the importance of technical challenge. This paper is part of an ongoing investigation of mechanisms for innovation in construction.

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