2) The following figure in the next page shows the geological and shear wave velocity profile of the Alameda Naval Air Station. Assume the total unit weight of the Old Bay Clay layer is 22.1 kN/m3 , and the groundwater table is at a depth of 7.5 m. Plot the total vertical stress, effective vertical stress, and pore water pressure versus depth for the Alameda Naval Air Station up to the bottom of the Old Bay Clay layer. S Velocity (m/sec) 100 200 300 400 500 600 SAND WATNIOAL F YT = 17 kN/m3 CLAY HOLOCENE BAY MUOI YT = 13 kN/m³ TTAND TO LOAMY SAND MERAITT SANDI YT = 19 kN/m³ ELOAMY SAND, wee beos o SLTY CLAY Vr = 21 kN/m³ SETY CLAY ESTOCENE BAY MUO Old Bay Clay 50 - FI SANDY LOAM GAAVELLY SAND CLAY LOAM TO SLTY CLA CLAY 100 AUSTOCENE ALLUV CLAY LOAM CLAY ECLAY LOAM SAND SANDY CLAY LOAM CRAVELLY SAND SHALE E AN ASTAE 150 Alameda Naval Air Station S-wave velocity profiles with dashed lines representing plus and minus one standard deviation. The statistics are done on the slope (reciprocal velocity) so that some of the limits will not appear symmetrical. Simplified geologic log is shown for correlation with velocities. from U.S. Geological Survey Open-File Report 92-287, "Seismic Velocities and Geologic Logs from Borehole Measurements at Seven STrong-Motion Stations that Recorded the 1989 Loma Prieta Earthquake" Depth (meters)

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter11: Ground Improvement

Section: Chapter Questions

Problem 11.10CTP

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Transcribed Image Text:2) The following figure in the next page shows the geological and shear wave velocity profile of the Alameda Naval Air Station. AsSsume the total unit weight of the Old Bay Clay layer is 22.1 kN/m3 , and the groundwater table is at a depth of 7.5 m. Plot the total vertical stress, effective vertical stress, and pore water pressure versus depth for the Alameda Naval Air Station up to the bottom of the Old Bay Clay layer. S Velocity (m/sec) 100 200 300 400 500 600 |Yr = 17 kN/m³ YT = 13 kN/m³ SAND ARTIFICIAL FILLU CLAY HOLOCENE MUDI SAND TO LOAMY SAND MERAITT SANOI YT = 19 kN/m³ LOAMY SAND, w n beds o SLTY CLAY STY CLAY Vr = 21 kN/m³ MESTOCENE BAY MUỜI Old Bay Clay 50- FINE SANDY LOAM GRAVELLY SAND CLAY LOAM TO SILTY CLAY F CLAY 100 - LEISTOCENE ALLUVIUM CLAY LOAM CLAY CLAY LOAM SAND SANDY CLAY LOAM GRAVELLY SAND SHALE TRA SCANASSEMLAGE 150 - Alameda Naval Air Station S-wave velocity profiles with dashed lines representing plus and minus one standard deviation. The statistics are done on the slope (reciprocal velocity) so that some of the limits will not appear symmetrical. Simplified geologic log is shown for correlation with velocities. from U.S. Geological Survey Open-File Report 92-287, "Seismic Velocities and Geologic Logs from Borehole Measurements at Seven STrong-Motion Stations that Recorded the 1989 Loma Prieta Earthquake" Depth (meters)

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