To determine the total load carrying capacity of a pile group, we need to consider the capacity of individual piles, the number of piles, and the group efficiency factor.
The total load carrying capacity of the pile group ($Q_{group}$) is calculated using the formula:
$ Q_{group} = n \times Q_{individual} \times \eta $
Substitute the given values into the formula:
$ Q_{group} = 10 \times 300 \text{ kN} \times 0.8 $
First, calculate the capacity without efficiency:
$ 10 \times 300 \text{ kN} = 3000 \text{ kN} $
Now, apply the group efficiency factor:
$ Q_{group} = 3000 \text{ kN} \times 0.8 $
$ Q_{group} = 2400 \text{ kN} $
Therefore, the total load carrying capacity of the group of 10 piles is $2400 \text{ kN}$.