Infiltration Systems near Moisture Sensitive Structure Bearing Soils
Infiltration Systems near Moisture Sensitive Structure Bearing Soils
(OP)
Here is an interesting topic. Where can water be infiltrated into the building load bearing moisture sensitive soils?
My thought is that the load extends at a 1:1 (+ or - with soil type) from the bottom of the footing, so not a great idea to introduce water within this area, until you get to a certain depth, as a function of some % load. And even then, still risky.
Interested if anyone else has some ideas when the site does not have much room for a required infiltration system?
My thought is that the load extends at a 1:1 (+ or - with soil type) from the bottom of the footing, so not a great idea to introduce water within this area, until you get to a certain depth, as a function of some % load. And even then, still risky.
Interested if anyone else has some ideas when the site does not have much room for a required infiltration system?
RE: Infiltration Systems near Moisture Sensitive Structure Bearing Soils
RE: Infiltration Systems near Moisture Sensitive Structure Bearing Soils
you are implying that if the soil gets wet something bad will happen. Please explain your failure mode?
If the soil is compacted below the critical void ratio (or resides that way in the natural state), in what way will the design strength or compressibility change when it gets wet?
'Cause, we'd have to really worry about our embankment dams!
f-d
ípapß gordo ainÆt no madre flaca!
RE: Infiltration Systems near Moisture Sensitive Structure Bearing Soils
RE: Infiltration Systems near Moisture Sensitive Structure Bearing Soils
RE: Infiltration Systems near Moisture Sensitive Structure Bearing Soils
If grading plans and FFEs are not finalized at the time of your geotechnical report, you should be requiring the engineers to provide those items when they are available so you can see if they impact your recommendations. Only then is your “design” (potentially) complete.
Im with OG. Is this just a theoretical question or does this pertain to a specific situation? Because they’re are too many variables in your opening post.
RE: Infiltration Systems near Moisture Sensitive Structure Bearing Soils
One thing that may work in your favor, however, is that loess may contain old small root holes that increase the vertical permeability and the wetted zone may have very steep sides, reducing the lateral effect. On the other hand, if there is an underlying low permeability formation, a groundwater mound that spreads out is likely to develop.
There are enough uncertainties that care is needed. I would resist a "required infiltration system" when building on loess. I have seen very serious building settlement problems caused by a water line leak some distance away.
RE: Infiltration Systems near Moisture Sensitive Structure Bearing Soils
RE: Infiltration Systems near Moisture Sensitive Structure Bearing Soils
BigH, I also have had many issues with trees (I think the PTI has a lot of info on the soil moisture gain/loss potential in expansive soils). A good read on it also is simply explained in Forensic Geotechnical and Foundation Engineering, by Robert Day,
RE: Infiltration Systems near Moisture Sensitive Structure Bearing Soils
BigH (Geotechnical)16 Jun 07 12:44
http://irc.nrc-cnrc.gc.ca/pubs/cbd/cbd184_e.html
http://www.lga.sa.gov.au/webdata/resources/project...
http://www.golder.com/Archive/AssessingConstructio...