2- Subsurface geotechnical investigations carried out in a deposit of sand provided the fieldstandard penetration numbers N60 as given in the table below. During the geotechnicalinvestigations, it is also observed that underground water table is encountered at a depth of 2.0 mbelow the ground surface. Laboratory tests have shown that physical properties of deposit of sandare as: Dry unit weight = 17.6 kN/m³ and saturated unit weight = 19.6 kN/m. Determine, for anearthquake magnitude of 8.25, if liquefaction will occur at the site. Assume that maximum peakground acceleration at the site is: amax = 0.25g.DEPTH (M)N60 (BLOWS/30CM)6.791112141821Note: the gravitational acceleration could be taken as 9.81 m/s.

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2- Subsurface geotechnical investigations carried out in a deposit of sand provide standard penetration numbers Ngo as given in the table below. During the g investigations, it is also observed that underground water table is encountered at a dep below the ground surface. Laboratory tests have shown that physical properties of dep are as: Dry unit weight = 17.6 kN/m and saturated unit weight = 19.6 kN/m. Detern earthquake magnitude of 8.25, if liquefaction will occur at the site. Assume that max ground acceleration at the site is: amax = 0.25g. DEPTH (M) N60 (BLOWS/30CM)

2- Subsurface geotechnical investigations carried out in a deposit of sand provide standard penetration numbers Ngo as given in the table below. During the g investigations, it is also observed that underground water table is encountered at a dep below the ground surface. Laboratory tests have shown that physical properties of dep are as: Dry unit weight = 17.6 kN/m and saturated unit weight = 19.6 kN/m. Detern earthquake magnitude of 8.25, if liquefaction will occur at the site. Assume that max ground acceleration at the site is: amax = 0.25g. DEPTH (M) N60 (BLOWS/30CM)

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Q11: A silty sand of density index (ID or Dr) = 59% was subjected to standard penetration tests at a depth of 3 m. Groundwater level occurred at a depth of 1.5 m below the surface of the soil which was saturated throughout and had a unit weight of 19.3 kN/m³. The average N count was 15. During calibration of the test equipment, the energy applied to the top of the driving rods was measured as 350 Joules. Determine the (N₁) 60 value for the soil.
PROBLEM The results of two triaxial shear tests on CH clay whose plasticity index is 50, unit weight 20kN/m³ are given below. Determine the shearing resistance of this clay at a depth of 15m by assuming (a) the clay is normally loaded(NL); and then (b) clay is overconsolidated(oC) TEST No 1 2 CELL PRESSURE(03)kPa 100 200 DEVIATOR STRESS (oa) 120 145
2- Subsurface geotechnical investigations carried out in a deposit of sand provided the field standard penetration numbers N60 as given in the table below. During the geotechnical investigations, it is also observed that underground water table is encountered at a depth of 2.0 m below the ground surface. Laboratory tests have shown that physical properties of deposit of sand are as: Dry unit weight = 17.6 kN/m³ and saturated unit weight = 19.6 kN/m³. Determine, for an earthquake magnitude of 8.25, if liquefaction will occur at the site. Assume that maximum peak ground acceleration at the site is: amax = 0.25g. (6 points) DEPTH (M) N60 (BLOWS/30CM) 3 5 6 7 9 11 12 14 18 21 Note: the gravitational acceleration could be taken as 9.81 m/s².
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