During the subsurface investigations for design of foundations, a standard penetration test wasconducted at 4.5m below the ground surface. The record of number of blows is given below.Penetration depth No. ofblows(cm)0-7.533667.5 -1515-22.522.5-3030 - 37.537.5 - 45Assuming the water table at ground level, soil as fine sand and correction factor for overburden as1.0, the corrected 'N' value for the soil would beCO87

Given- Water table at ground, Soil is fine sand, Correction factor for overburden=1.0, Rest is given…

During the subsurface investigations for design of foundations, a standard penetration test was conducted at 4.5m below the ground surface. The record of number of blows is given below. Penetration depth No. of blows (cm) 0 -7.5 7.5 - 15 15-22.5 22.5-30 3 3 6 6 30 - 37.5 8 37.5 - 45 7 Assuming the water table at ground level, soil as fine sand and correction factor for overburden as 1.0, the corrected 'N' value for the soil would be

During the subsurface investigations for design of foundations, a standard penetration test was conducted at 4.5m below the ground surface. The record of number of blows is given below. Penetration depth No. of blows (cm) 0 -7.5 7.5 - 15 15-22.5 22.5-30 3 3 6 6 30 - 37.5 8 37.5 - 45 7 Assuming the water table at ground level, soil as fine sand and correction factor for overburden as 1.0, the corrected 'N' value for the soil would be

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter16: Soil Bearing Capacity For Shallow Foundations

Section: Chapter Questions

Problem 16.1CTP: The following table shows the boring log at a site where a multi-story shopping center would be...

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A square footing having the dimension of 24 x24 (B=L=24) is to beconstructed on a deep clay deposit. Superstructural stress is calculated as 150 kPa. Thefoundation will rest at the depth of 2 m from the surface. The groundwater table is located onthe surface and the saturated unit weight of the clay is 17 kN/m3. Determine the depth of theborehole considering both de Beer’s rule and the Turkish Earthquake Code (2018).
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The following table shows the boring log at a site where a multi-story shopping center would be constructed. Soil classification and the standard penetration number, N60, are provided in the boring log. All columns of the building are supported by square footings which must be placed at a depth of 1.5 m. Additionally, the settlement (elastic) of each footing must be restricted to 20 mm. Since the column loads at different location can vary, a design chart is helpful for quick estimation of footing size required to support a given load. a. Prepare a chart by plotting the variation of maximum allowable column loads with footing sizes, B = 1 m, 1.5 m, 2 m, and 3 m. Use a factor of safety of 3. b. If the gross column load from the structure is 250 kN, how would you use this chart to select a footing size? c. What would be the design footing size for the column in Part (b) if you use Terzaghis bearing capacity equation? For the well graded sand, assume that = 33. Use Fs = 3. d. Compare and discuss the differences in footing sizes obtained in Parts b and c.
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