What Is Pile Group Efficiency?
The efficiency of the pile group can be calculated by using the following formula: Thus, the pile group efficiency is equal to the ratio of the average load per pile in the group at which the failure occurs to the ultimate load of a comparable single pile.

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Correspondingly, what is a pile group?

A pile group is a set of piles that have a pile cap that means that they act together to carry the load.

Also Know, how is pile capacity calculated? Ultimate end bearing capacity in soft clay = 9 × 120 × π × diameter2/4 = 848.2 lbs/per pile. Total ultimate bearing capacity per pile = 76,920 + 848.2 = 77,768 lbs. = 12 × 77,768 × 0.8 = 746,573 lbs = 373 tons. Step 3: compute the pile group capacity (failure as a group).

Keeping this in view, what is block failure of pile group?

Block failure occurs generally when the spacing of piles is less than about three times the pile diameter. In this case, the soil, bound by a perimeter of the pile group over the embedded length, acts as a single unit or block. Individual pile failure occurs when the piles are spaced at about eight times the diameter.

What is meant by group settlement ratio?

This note studies settlement ratio, Rs, of pile groups in sandy soils, defined as the ratio of the settlement of a pile group to that of a single pile at the same average load per pile. η is usually larger than unity due to soil densification and additional contributions from the cap-ground contact for PGCs.

Related Question Answers

What are pile foundations?

Pile foundation , a kind of deep foundation, is actually a slender column or long cylinder made of materials such as concrete or steel which are used to support the structure and transfer the load at desired depth either by end bearing or skin friction. Pile foundations are deep foundations.

Why do we use pile foundation?

Pile foundations are principally used to transfer the loads from superstructures, through weak, compressible strata or water onto stronger, more compact, less compressible and stiffer soil or rock at depth, increasing the effective size of a foundation and resisting horizontal loads.
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