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We have water percolation pits installed around the house to handle waste water from kitchen, washing machine and bathroom.

I worry whether this water percolation pit can affect the RCC column and footer which is my foundation?

The building was constructed using framed structure rather than load bearing wall structure.

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4 percolation pits (2 feet radius) by south side of my building:

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2 percolation pits (3 feet radius) by north side of building:

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Sand texture:

  • It's clay
  • Water table 2 ( During rainy season ) to 4 feet ( During summer )
  • Ground water is saline

Here is what government geological survey says about the soil profile

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I have already made significant investments into buying the concrete cement rings and placing it.

If this is gonna be a problem, I can certainly consider buying some more land and spread out the waste water over a garden. But this is a huge investment again.

Let's say above is an option, then leaving these Percolation pit empty. I mean divert the water to elsewhere. Then I may leave the percolation pits as it is.

From my experience, I can say the water level in percolation pit goes up and down, without any incoming water from building.

I think water gets filled into the pit by surface level aquifer.

Would this be a problem to footing and cause any differential settlement?

isherwood
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Amogam
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1 Answers1

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You need to lower the water table below the bearing face of the concrete footings to prevent oversaturation of the voids surrounding the soil particles which could cause soil movement and uneven settlement of the footings.

user418383
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