Sirs: Does this or similar 'mail fillers' make the task of SI conversion easier for America! Well, if helps important info sharing....NO OFFENCES! BB Vij
>From: "Nat Hager III" <[EMAIL PROTECTED]> >Reply-To: [EMAIL PROTECTED] >To: "U.S. Metric Association" <[EMAIL PROTECTED]> >Subject: [USMA:21836] Pile drivers >Date: Tue, 20 Aug 2002 14:42:54 -0400 > >Article in piledrivers trade mag, on East Span San Francisco-Oakland Bay >Bridge Project. Looks like it's all metric, I'll just quote a bit..... > >Nat > >http://www.piledrivers.org/pdca/pdf/pdcaSpring2002.pdf (page 29) > > >By Roger Howard Jr., PE >Anthony R. Dover, GE >Saba Mohan, PE >Robert F. Stevens, PD, PE > >This paper briefly describes the Pile Installation Demonstration Project >(PIDP) and summarizes the findings and conclusions based on the >installation >of >three large-diameter steel pipe piles in the San Francisco Bay as part of >the San >Francisco-Oakland Bay Bridge (SFOBB)East Span Seismic Safety Project. The >PIDP was conducted to better understand pile handling, marine construction >opera-tions, >pile driveability and pile setup asso-ciated with installing >large-diameter, >steel >pipe piles into San Francisco Bay sedi-ments.Three 2.5-meter (8 feet) >diameter >pipe piles were driven in the area between the existing Bay Bridge and the >planned >replacement bridge alignment. Additional details of the PIDP can be found >in >the >Pile Installation Demonstration Project Geotechnical Report (Fugro-EM, >2001a) >and in Howard et al. (2002) and Mohan et al. (2002). > >Background >The San Francisco-Oakland Bay Bridge East Span Seismic Safety Project >willl replace the east span of the world�s busiest toll bridge and is the >largest in the >history of the California Department of Transportation (Caltrans). The >existing >east span of the SFOBB carries 10 lanes of traffic between Yerba Buena >Island and >Oakland. During the 1989 Loma Prieta earthquake, the east span of the >existing >bridge suffered considerable damage,including the collapse of a deck >section. >In 1995, the Seismic Advisory Board sug-gested replacement in lieu of >retrofit. In >June 1998, the single-tower, self-anchored suspension bridge structures >and haunched concrete skyway structures were selected for final design. >Final >design of the chosen structure types and alignment was begun by the joint >venture >of TY Lin International and Moffatt & Nichol Engineers in the late fall of >1998, >with the geotechnical site characterization and foundation engineering >being >provid-ed >by a joint venture of Fugro-West, Inc., and Earth Mechanics, Inc. >(Fugro-Earth >Mechanics). > >Proposed Foundation Description >The foundation of the SFOBB main span-east pier and skyway structures will >be founded on 2.5-meter-diameter, driv-en steel pipe piles that are >approximately >70 meters to 95 meters (230 feet to 310 feet) long with non-uniform wall >thick-ness >schedules. The piles will be driven at a batter (1H:8V and 1H:12V), >primarily >to provide more lateral resistance and associated lateral foundation >stiffness dur-ing >ground shaking from a seismic event. PIDP Project >Three piles were driven for the PIDP between Oct. 23 and Dec. 13, 2000, by >Manson/Dutra (a joint venture of Manson Construction Co. and The >Dutra Group) under contract to Caltrans. The piles were installed at two >locations >(designated the Primary Test Location for Pile Nos. 1 and 2 and the Pile >No. >3 Test >Location) > >(Continued On Page 30)........... _________________________________________________________________ Join the world�s largest e-mail service with MSN Hotmail. http://www.hotmail.com
