Underground parking + high water table, soakaway

[markwm]

We were hoping to have underground parking in the house we're currently designing (demolish and new build job). The water table gets to about 5-6ft below ground level, we know this because in the old house the cellars flood when it rains.

My architect seems to think that because of the high water table a soakaway isn't going to work. The only other option he has suggested is a sump/pump to pump water into the sewer but we may not get permission from the sewer company.

The underground parking would have a long ramp down. I'm not a drainage expert but do we have any other options?

 

[^woody^]

A soakaway wont work

You need tanking and a pump to remove the local water.

The only issue is where is this water to be pumped to. Storage tanks, to other land drains, or the house drains

 

[JohnD]

you are not allowed to put ground water into a public drain.

 

[davebelushi]

you need to design a de-watering system. some seepage of ground water is acceptable in a car parking area. you should look at a document called BS8102 (protecting structures from ground water) for guidance.

D