Question

Using boring log data to determine soil properties ( ϕ’,c,γ) for each soil layers (interpolation may be needed)

BORING LOG: BH-1 SHEET 1 o 1 PROJECT CONTRACTOR DRILLER: INSPECTOR: PROJECT CUIENT CUENT PROJECT COORDINATESN RIG TYPE DRILLING METHOD HAMMER TYPE SURFACE ELEV: 781.5 TOTAL DEPTH: 23 REF ALIGNMENT STATION OFFSET LOCATION: Tucson COMMENTS TIME TIME START DATE: FINISH DATE: cu L.D. O.D. Length Hammer WT Hammer Fall 622.75 N Drill Rod Size I.D. 1O.D.) BLOWS 762mm SOIL SAMPLE VISUAL MATERIAL CLASSIFICATION | | | , AND REMARKS Silty sand with gravel (SM Poorly graded sand with gravel and boulders (SP) 0.5 459 14 57 S3 10 045 12 4 10 24 457Lean clay, hard, dark brown to gray (CLU gra 765 60 encountered BORING LOG: BH-2 SHEET 1 of PROIECT a CONTRACTOR PROJECT CLIENT CLIENT PROJECT COORDINATES RIG TYPE DRILLING METHOO HAMMER TYPE SURFACE ELEV:781 TOTAL DEPTH: 20 REF. ALIGNMENT STATION OFFSET LOCATION: Tucson COMMENTS IME: TIME START DATE FINISH DATE cu Type Symbol L.D O.D. 4.93mm 63.50 50.80mm 76 Rod Hammer WT Hamer Fall 622.75 N 762mm SOIL SAMPLE 左1 vsUAL MATERIAL CLASSIFICATION DEPTH AND REMARKS Sity sand with gravel (SM 11|리10|22|457 ha5 orly graded sand with trace of gravel SP sls- 10 1315 28 an diag urd darx brown to gsy CU 770 Well graded sand, very dense BORING LOG: BH-3 SHEET 1 of 1 PROJECT CONTRACTOR- PROJECT CLIENT CLIENT PROJECT RIG TYPE DRILLING METHOD: HAMMER TYPE SURFACE IL: 782 TOTAL DEPTH: 21 START DATE FINISH DATE REF ALIGNMENT TATION OFFSET COORDINATES N LOCATION: Tucson COMMENTS TIME TIME 4.93mm 63.50m 50.80mm 75.20mm O.D. Length Hammer WT Hammer Fall BLOWS SOIL SAMPLE VISUAL MATERIAL CLASSIFICATION AND REMARKS Silty sand with gravel (SM Poorly graded sand with trace of gravel ISP) Lean clay, hard, dark brown to gray (CL) Well graded sand, very oense Horizontal distance (m) 0 2 46 8 10 12 14 16 18 20 784 782 780 778 776 774 รู้ใ72 784 782 780 BH- 84 Layer 2 N 3 20 kNmP 38. 776 774 772 770 768 766 764 762 EOB - 21 -| 760 758 Layer 4 19 KN/3 26.0 766 764 N-64 66.0 E21 KN/m3 760 758 L EE08-23 Fig. 5

Answer 1

Using the given data SPT N-value of different soil layers,

Properties SPT N Values, Nature of the Angle of internal Unit weight of soil, S.No Cohesion, kN/m 69.12 NA 177.12 NA Layer soil Bv sivrikaya&Togr ol et al (2006) - Cu 4.32*Nfield fricton By Peck et al (1953), ф-0.3*N-27 16 SM SP CL SW 18 20 20.5 19 Laver 1 Layer 2 Laver - 3 Layer - 4 31.8 36.9 NA 34.8 41 26

the values of different soil properties are found out using the correlations given by the eminent researchers.

The correlation and the corresponding values are shown in the above table.