South Hartford Conveyance and Storage Tunnel Project-Drop and Vent Shaft Construction

摘要

The South Hartford Conveyance and Storage Tunnel (SHCST) is a major component of the Hartford Metropolitan District's Clean Water Project (CWP). The tunnel will capture and store Combined Sewer Overflows (CSO) from the southern portion of Hartford, CT and Sanitary Sewer Overflows (SSO) from West Hartford and Newington, CT. The project includes 21,800 ft of 18 ft final diameter tunnel, several miles of consolidation sewers, eight hydraulic drop structures and a 50 mgd tunnel dewatering station. This paper describes the challenges and methods used to construct the drop and vent shafts.