Geotechnical Investigations for the Anacostia River Projects
Abstract
The Anacostia River Projects (ARP) is the major component of the Long Term Control Plan (LTCP) for the District of Columbia Water and Sewer Authority (DC WASA). The ARP consists of an approximately 20.4-km-long (12.7 mile) tunnel system, including 18 large-diameter deep shafts and supporting structures. This paper presents the ongoing geotechnical investigations used to characterize the subsurface for the ARP. Drilling methods include sonic and conventional, and boring spacing is about 190 m (600 ft). Field testing includes pressuremeter, vane shear, and crosshole seismic. Laboratory testing includes index, triaxial, consolidation, soil abrasion testing (SAT), soil chemistry, and water quality. Estimated cost for the investigations is $6.5 million.
2010
North American Tunneling (NAT) Conference
Amanda Morgan
Jacobs Associates
Kevin Fu
URS Corporation
Ronald E. Bizzarri
District of Columbia Water and Sewer Authority
Carlton M. Ray
District of Columbia Water and Sewer Authority
