THE SOUTH COVE TUNNEL PROJECT, BOSTON, MASSACHUSETTS

THE DESIGN ASPECTS ARE OUTLINED OF A NEW SUBWAY STRUCTURE IN DOWNTOWN BOSTON, WHICH FORMS PART OF THE MASSACHUSETTS BAY TRANSPORTATION AUTHORITY'S (MBTA) SOUTHWEST CORRIDOR EXTENSION. IT WILL REPLACE AND EXTEND SERVICE BETWEEN THE WASHINGTON STREET TUNNEL AND FOREST HILLS WITH AN IMPROVED, HIGH PERFORMANCE TRANSIT FACILITY AND WILL PROVIDE PATRONS WITH A SPEEDIER, MORE COMFORTABLE, AND SAFER JOURNEY. SOIL BORINGS ALONG THE TUNNEL ROUTE ESTABLISHED THE FACT THAT A LAYER OF MISCELLANEOUS FILL COVERS A LARGE PORTION OF THE SITE UNDER WHICH OCCUR THE SILTS, OCCASIONALLY WITH PEAT. BENEATH THE SILTS ARE THE CHARACTERISTICALLY BOSTON CLAYS - SOFT BLUE AT THE BOTTOM, STIFFER YELLOW AT THE TOP. THE PROPERTIES OF COHESIVE SOIL STRATA WERE EXAMINED IN DETAIL BY MEANS OF LABORATORY TESTS ON UNDISTURBED SAMPLES. LOADS WERE CALCULATED ON THE SUBWAY STRUCTURE. SUPPORT OF EXISTING BUILDINGS WILL BE PROVIDED BY A TREMIE CONCRETE WALL. CONSTRUCTION TECHNIQUES USED WILL BE CUT-AND-COVER TUNNELLING, TUNNEL BORING, AND INSTALLATION OF A CONCRETE CUT-OFF WALL BY SLURRY TRENCH PROCESS. VENTILATION PROVISIONS AND RAIL SUPPORTS ARE DESCRIBED. THE MBTA'S TRAINS WILL BE IN DAILY OPERATION DURING THE PERFORMANCE OF THE WORK IN THE EXISTING TUNNEL.

  • Supplemental Notes:
    • Vol 55, No 4, PP 253-283, 12 FIG
  • Authors:
    • Stacho, Z A
  • Publication Date: 1968-10

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  • Accession Number: 00235454
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 21 1994 12:00AM