Basic questions : Groundwater / foundation interaction
Basic questions : Groundwater / foundation interaction
(OP)
The bottom of my foundation trenches (0.700m deep) are filled with a little groundwater (+- 5mm). 1.500m deep test holes dug at the highest point of the site are 90% filled with water and 60% filled at the lowest point of the site. The site slopes at a rate of 1.500m over 32.750m. We will be putting in steel reinforced concrete strip foundations (0.300m deep x 0.700m wide).
a) Is it normal to have more water at the top of the site than at the bottom ?
b) Is this water a problem ?
c) What will be the effect of the groundwater on the foundations / house ?
d) What will be the effect on the foundations / house if the water were to be gradually removed by a drain ("french drain" ?) ?
e) What would happen during cold seasons ?
a) Is it normal to have more water at the top of the site than at the bottom ?
b) Is this water a problem ?
c) What will be the effect of the groundwater on the foundations / house ?
d) What will be the effect on the foundations / house if the water were to be gradually removed by a drain ("french drain" ?) ?
e) What would happen during cold seasons ?





RE: Basic questions : Groundwater / foundation interaction
RE: Basic questions : Groundwater / foundation interaction
RE: Basic questions : Groundwater / foundation interaction
To answer your queries :
The soil, according to the engineer is 'decomposed sandstone'.
The footings will be below the frost line.
Any ideas for a 'good' drain design - one that will last a long time without blocking up ?