HOMEWORK SOLUTION

 

HW #2

 

CE 455

FOUNDATION AND EARTH STRUCTURE

 

(Question no. 2.3, 2.5, 2.14, & 2.20 ..Braja M. Das textbook)

 

 


2.3 NF = 6, K = 4.2 kN/m2

Unconfined compression strength (qu) = 2*cu=2*KNF = 2*4.2*6 = 50.4 kN/m2

 

2.5 f = 27.1+0.3Ncor-0.00054Ncor2

Ncor = CNNF

 

 

 

 

 

 


According to Liao and Whitman CN =

 

 

 

2.14 gd = 15.5 kN/m3

Estimate the average peak friction angle (f) and average relative density (Dr)

Use eq. 2.26

And figure 2.32 for average relative density (Dr)

 

2.20 Velocity of P-wave (v) = 1900 m/sec, u = 0.32, g = 18 kN/m3

The modulus of elasticity of the soil

eq. 2.48