Chicago · permit 100775808

14 W 95TH ST

CTA 95TH STREET TRANSIT STATION- THE NORTH BUS BRIDGE IS A MODIFICATION OF THE EXISTING 95TH STATION NORTH BUS BRIDGE, WIDENING THE BRIDGE FOR THE NEW TERMINAL. THE EXISTING BRIDGE DECK IS REMOVED, NEW DECK BEAMS ARE INSTALLED BOTH TO THE NORTH AND SOUTH OF THE EXISTING BRIDGE STRUCTURE. THE NEW DECK BEAM ARE SUPPORTED BY INDEPENDENT CROSS GIRDERS AND COLUMNS LOCATED BETWEEN THE EXISTING CTA TRACKS IN THE MEDIAN OF THE DAN RYAN EXPRESSWAY. THE COLUMNS ARE SUPPORTED ON A CAISSON CAP. THE CAISSONS ARE ROCK SOCKETED SHAFTS, 3'-6" IN DIAMETER WITH THE ROCK SOCKETS 3'-0 IN DIAMETER. THE SOCKETS EXTEND A MINIMUM OF 4'-6" INTO ROCK. THE FACTORED RESISTANCE OF THE CAISSON IS 2,600 KIPS WITH ALLOWABLE ROCK BEARING PRESSURE OF 370 KSF. THE SHAFTS ARE APPROXIMATELY 40 FEET LONG. MODIFICATIONS ARE ALSO MADE TO THE EXISTING ABUTMENT BACKWALLS TO ACCOMMODATE THE NEW BRIDGE CONFIGURATION.