Load on piles that are driven into friction material, for the most part the weight is carried by friction between the soil and the pile shaft. However considerable additional support is obtained form the bottom part.
In designing piles driven into friction material, the following formulas can be used
where: qci = consolidation resistance
*a can be decided using table 10-4
Ab = end cross-sectional area of the pile
Ami = shaft area of the pile in contact with the soil.
should be �
1.5 for piles in friction material
qcs = end resistance at the bottom of the pile within 4 �
pile diameter from the end of the pile
Figure 5-1 Friction Pile
Pile length 22 m, steel pile, friction pile, external diameter 100 mm, GC2,
Determine the ultimate bearing capacity of the pile
Z� m( depth measured from ground level to bottom of pile)MPa0m - 5 m5.45 - 116.411 - 187.018 - 227.522 m8.0
The values are slightly scattered then the usual while the rest of the condition is favourable.
= 1.5 (the lowest value)
g n = 1.1
At the base where condition is unfavourable we get :
s = 0.5
m = 0.0025
Design bearing capacity of the pile is 62 KN.ولمزيد من المعلومات يمكن الدخول الى هذا الموقع
مع تحياتي للجميع
م. رزق حجاوي