I working with a bachelor degree in construction engineering and geotechnic. I am working with a soil nail analysis and need help with calculations in sheer strenght, totalt vertical strenght of the...

Solution:
Soil type is Fine- Medium sand
Above water table Unit weight  =19.16 KN/m3
Unit weight saturated soil: 19.94KN/m3
Surcharge load q=10KN/m3
Assume
Case 1: If the cohesion, c, is equal to zero
For the top soil layer (Assume) ,  = 36o, so
)
2
45(tan 2

aK
)
2
36
45(tan 2 aK
Ka=0.259
Active earth pressure coefficient
Ka=0.259
Assume because of the presence of the water table below the height of nail wall but
above retaining wall So, there is no any effect of hydrostatic pressure
At z = 0,
10
'
v KN/m
2
Thus,
va
'' 259.0  
10259.0
'
a
59.2
'
a KN/m
2
This is constant and equal throughout the wall depth
At depth 1 meter, up to which there is no any water table
' '
a v aK 
The lateral pressure is linearly vary
At depth 1
zv  
'
2' /16.19116.19 mKNv 
vaa K
''  
2/96.416.19259.0' mKNa  Z=0






Z=1m 2.59KN/m2 4.96 KN/m2


Thus total earth pressure is due to surcharge + due to soil=2.59+4.96=7.55 KN/m2


The pressure distribution diagram is plotted above. Then, the force per unit length:
Pa=Area of rectangle +...