Pile Layout Plan

Once initial understanding is developed on how soil strata beneath our site vary, its time to know how our Design Engineer has distributed the piles in various zones. Primarily columns location determine the location of piles and then column loads dictate the size of a pile and number of piles supporting a particular column. As from the earlier topic “Pre-piling area study”, you are aware that there are multiple boreholes to understand the strata variation. Based on the borehole study the whole site is divided into various zones. Such a zoning help engineers to take worst soil condition in a zone and then design all piles within that zone against the worst case scenarios of Load, Skin friction and End bearing.

A pile layout plan presents following key information:

  • Zoning of a building block (Zone No. Borehole No.)
  • Location of piles
  • Type of Pile (Pile ID, Size, Depth, Rebar detail )
  • Number of Piles
  • Pile Design Parameters adopted (Skin friction, End bearing )
  • Any other information or note important with regard to a particular project.

Let me take you through a sample pile layout to explain all of these.

 

Piling plan, bored pile, construction, Yasir Cheema

A part print of sample pile layout plan.

The above part print from a pile layout plan of a building block shows that a particular building is divided into two different zones, Zone 16 & Zone 17. From the grid line and the distances with respect to grid lines and other piles can help you to determine the exact location of a particular pile. There can be any degree of variation in pile sizes for a particular building block. However, each pile type is given a unique identity and in this case, you can feel the difference in the representation of piles of different diameters.

Another part of the pile layout tells us about the design parameters. Like which borehole data is used to design a particular pile, how much is the depth of a particular pile, what’s the maximum skin friction & end bearing is used in the calculation of the pile.

Piling work, Pile table, bored pile, Construction, Yasir Cheema

A part print of pile layout plan.

 

After having a drawing in hand providing this much info, I am sure you will be able to identify all the key info relating to a particular pile.

Let’s take a try, Can you find the Location of a pile G87 with respect to a Grid Line? The size of the G87 pile? Design penetration of G87?

I am very hopeful that you’re able to find it. You try to do the same for some other pile and I prepare for the next topic.  See you there.