Design of Precast Segmental Tunnel Lining for Pawtucket CSO Tunnel Project

Synopsis:

This paper will describe design of precast segmental tunnel lining for the Pawtucket CSO Tunnel Project in Providence, Rhode Island. The tunnel is 11,700 LF long with 30-foot finished diameter to be constructed in complex sedimentary rocks. Special features of the segments include a large keystone and no connector used on radial joints. The typical segments will be steel fiber reinforced, and hybrid segments with additional steel rebars and shear bicones will be used around the adit openings without use of any structural framing. The important design considerations will be discussed, including special 3D segment to adit connection analyses performed.

2022 North American Tunneling Conference Proceedings
June 19-22, 2022, Philadelphia, PA (Halim, I., Kim, S. H., Gall, V. E.)
Copyright holds Society for Mining, Metallurgy & Exploration (SME). Full proceedings volumes can be found on website at www.smenet.org.