Identification of Typical Soil Profiles in the Boston Basin Area, Optimum Seismic Protection for New Building Construction in Eastern Metropolitan Areas

摘要

Five soil profiles in the Boston Basin area were developed for use in the seismic analysis of buildings in Eastern metropolitan areas. The soil survey comprised collecting and analyzing the extensive data that is available for the M.I.T. campus, and the numerous projects in which M.I.T. personnel have been engaged. The profiles are somewhat similar, being differentiated mainly by the thickness of clay layers. Generally, they start from bedrock and work up through glacial till, outwash sands and gravel, clay (less than 60 feet to a maximum of about 180 feet), outwash sands and gravels, peat and/or organic silt, and heterogeneous man-placed fills. Additional subsurface data was obtained from the Boston Society of Civil Engineers which located these profiles and indicated that they were representative of the area. The profiles were confirmed and refined by geologists and consulting engineers. Each profile is shown together with a typical profile for the Boston Bay area and maps locating the profiles. A bibliography is included.