Answer Happy

5. Based on the attached geotechnical boring log, estimate the effective stress, total stress and pore pressure at Elevation 180 ft, Elev. 171 ft. and Elev. 164 ft. You may need to make reasonable assumptions.
LOG OF TEST BORING Tecolote Canyon Sewer Main SITE LOCATION San Diego, CA DRILLING COMPANY Pacific Drilling DRILLING EQUIPMENT Fraste MD/XU SAMPLING METHOD SPT PROJECT NAME PROJECT NUMBER BORING 2945 B-9 START FINISH SHEET NO. 10/17/2018 10/17/2018 1 of 2 2 DRILLING METHOD LOGGED BY CHECKED BY Hollow Stem Auger G. Spaulding BORING DIA. (in) TOTAL DEPTH (ft) GROUND ELEV (ft) DEPTH/ELEV. GROUND WATER (Ft) 6" 21.25 184 1 8.5 / 175.5 NOTES Approximate Station 277 +00 DEPTH (ft) ELEVATION (ft) SAMPLE TYPE SAMPLE NO. PENETRATION RESISTANCE (BLOWS/ft) DRY DENSITY (pct) MOISTURE (%) OTHER TESTS GRAPHIC LOG DESCRIPTION AND CLASSIFICATION COLLUVIUM/ALLUVIUM SILTY FINE SAND (SM), damp, very loose to loose, light brown to brown 1 6.4 pH/R CL / SF LC/GS - Bulk sample 0' - 6' -180 SANDY CLAY (CL), moist, soft to medium stiff, brown -5 DI 2 4 - 175 -10 - Becomes wet, soft, mottled gray-brown/brown/red TOT 3 3 3 SCRIPPS FORMATION FINE SANDY CLAY (CL), moist to wet, stiff, mottled gray-brown/brown -170 -15 S 5 4 19 TCG_METRIC_LOG(3) 2945.GPJ GDCLOGMT.COM -165 TerraCosta TerraCosta Consulting Group, Inc. 3890 Murphy Canyon Road, Suite 200 Consulting Group, San Diego, California 92123 THIS SUMMARY APPLIES ONLY AT THE LOCATION OF THIS BORING AND AT THE TIME OF DRILLING. SUBSURFACE CONDITIONS MAY DIFFER AT OTHER LOCATIONS AND MAY CHANGE AT THIS LOCATION WITH THE PASSAGE OF TIME. THE DATA PRESENTED IS A SIMPLIFICATION OF THE ACTUAL CONDITIONS ENCOUNTERED. FIGURE A-10 a
LOG OF TEST BORING Tecolote Canyon Sewer Main SITE LOCATION San Diego, CA DRILLING COMPANY Pacific Drilling DRILLING EQUIPMENT Fraste MD/XU SAMPLING METHOD SPT PROJECT NAME PROJECT NUMBER BORING 2945 B-9 START FINISH SHEET NO. 10/17/2018 10/17/2018 2 of 2 DRILLING METHOD LOGGED BY CHECKED BY Hollow Stem Auger G. Spaulding BORING DIA. (in) TOTAL DEPTH (ft) GROUND ELEV (ft) DEPTH/ELEV. GROUND WATER (ft 6" 21.25 184 1 8.5 / 175.5 NOTES Approximate Station 277 +00 DEPTH (ft) ELEVATION (ft) PENETRATION RESISTANCE (BLOWS/ft) DRY DENSITY (pc) MOISTURE OTHER TESTS GRAPHIC LOG 10 SAMPLE TYPE SAMPLE NO. DESCRIPTION AND CLASSIFICATION 5 94/9" Bottom of hole @ 21 feet 3 inches. Perched groundwater encountered from 8.5 feet to 13 feet. - -160 -25 - 155 30 - 150 35 TCG_METRIC_LOG(3) 2945.GPJ GDCLOGMT. GDT -145 TerraCosta TerraCosta Consulting Group, Inc. 3890 Murphy Canyon Road, Suite 200 Consulting Group, San Diego, California 92123 THIS SUMMARY APPLIES ONLY AT THE LOCATION OF THIS BORING AND AT THE TIME OF DRILLING. SUBSURFACE CONDITIONS MAY DIFFER AT OTHER LOCATIONS AND MAY CHANGE AT THIS LOCATION WITH THE PASSAGE OF TIME. THE DATA PRESENTED IS A SIMPLIFICATION OF THE ACTUAL CONDITIONS ENCOUNTERED. FIGURE A-10 b