Design of Hybrid Precast Segmental Tunnel Linings for the 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.

2023 Underground Construction Prague Conference Proceedings
May 29-31, 2023, Prague, Czech Republic (Gall, V., Gall, V.E., Halim, I., Polycarpe, S.)
Copyright holds International Tunnelling And Underground Space Association (ITA-AITES). Full proceedings volumes can be found on website at https://library.ita-aites.org/