Chapter18-Subsoil Exploration

Ex1-pg642

In [1]:
#Determine the correctedstandard penetration numbers, (N1)60, at various depths
import math
##solving for z=5 only
To=0.275
Cn=To**(-0.5)
N60=8
N160=Cn*N60
print'%s %.1f %s'%('(N1)60 = ',N160,'')

(N1)60 =  15.3

Ex2-pg643

In [2]:
#estimate the average soil friction angle,f, from z0 to z25 ft
#import math
z=5.
To=0.275
Cn=2./(1.+To)
N60=8.
N160=Cn*N60
print'%s %.1f %s'%('(N1)60 = ',N160,'')

(N1)60 =  12.5

Ex3-pg643

In [3]:
#estimate the average soil friction angle, f, from z0 to z25 ft
import math
pa=1. ## 14.7 lb/in**2 = 1ton/ft**2
To=0.275 ## ton/ ft**2
N60=8.
c= math.atan((N60/12.2+20.3*(To/pa))*57.3)**0.34
print'%s %.1f %s'%('The average soil friction angle = ',c,'')

The average soil friction angle =  1.2