Answered: he soil profile and soil properties at…

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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The soil profile and soil properties at a site are shown in the table below. A group of 12 concrete piles in a 3 x 4 matrix and of length 12 m is used to support a load. The pile diameter is 0.45 m and pile spacing is 1.5 m.
Determine the allowable load capacity for a factor of safety of 2. Calculate the total settlement (elastic and consolidation) under the allowable load. Assume E_p = 20 x 10⁶ kPa.

Туре of
deposit
Depth (m)
Soil test results
y = 17 kN/m?, d'es = 28°
E'so = 19 MPa
O to 3
Sand
%3D
Groundwater
level at 3 m
Ysat = 17.5 kN/m³, d'és = 30°
E'so = 18 MPa
3 to 6
Sand
6 to 15
Ysat = 18.5 kN/m3, d = 27°
Sy = 30 kPa
Cc = 0.4, C, = 0.06,
OCR = 1.5
E = 30 MPa, v = 0.3
Clay
%3D
Ysat = 18 kN/m, d'os = 24°
Sy = 20 kPa
C. = 0.8, OCR = 1.0
E'so = 10 MPa, v' = 0.3
15 to 17
Soft clay
>17
Rock

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