Pore water pressure 4. https://www.youtube.com/watch?v=h-GaOiWZPYM) Using proper gravel backfill instead of clay/silty soil goes a long way towards alleviating the wall pressure from 2.) …down near bottom… Where is says, --From the inept to the out n out SCAMS, 638.22 KB, 2nd paragraph, i don’t always agree with this former builder, how he describes hydrostatic pressure… If ever you decide to design this wall, you will see that your critical moment and shear will be at the base, even if you have some soil supporting on the left hand side.

Passive Pressure. Can you, Randy or anyone else think of a scenario where the above 4 practices are followed but an exterior drain tile remains clogged, and future cracks/leaks still appear? She has grass right there so most often when there’s a crack etc below grade and only grass/dirt then the water usually comes in fairly quick. Benefits/pitfalls of defining function that is discontinuous at a point "explicitly" vs using piecewise? Like in this video, the concrete slabs are pitched away, the homeowner sealed the perimeter, the edge of where the concrete meets the house… did that identify the actual problems and did that fix/waterproof the actual problems? Your next line of defense is to design the exterior foundation drainage system to capture, collect and discharge the water away from the foundation as quickly as possible. video, i did a water test here, see the location of the hose… I ran the water directly on the outside of where she FIRST gets, sees, water inside. I hope you will be patient with me as I try to understand what about the science of water in soils and waterproofing material properties suggest that following the above practices 1-4 make a working exterior perimeter drain tile unnecessary. 3.) Laws and Treaties for Activities in Outer Space. If so, any bricks below grade? “IF” , you get water in on floor at–along the bottom of wall–floor meet or through the crack, your problem is the crack, waterproof the crack on the exterior…small job. The more water you add to dry soil the more fluid like it becomes. Problem. Thanks for the additional video and comments.

–Severity of problem… each year SHRINKING or swelling inflict $$ damages to houses, building, roads etc-- more than twice the damage from floods, hurricanes, tornadoes and earthquakes…, The U S Army Corps link previously posted… causative factors… one is “shrinkage & swelling of clay”. fairfaxcounty.gov

by providing a low resistance path for the water down to the footer drain tile BUT it only works if the drain tile can accept the water.

Thanks for contributing an answer to Engineering Stack Exchange! You guys think all the water goes into the exterior or interior drain tiles? So what is the proper way to do this? Properly applied that’s exactly what they do.

p = ρ g h Fairfax county VA… page 6, 7 Damage to foundation walls… Randy, just asking, so your answer to leaky basements is a curtain drain and adding soil, regrading, pitch n slope? If you get moisture/water on your wall when soaking the foundation wall (below grade) then I’d calla few peeps and tell them you would like the corner waterproofed, not 1/2 the wall, not the entire wall, the corner. For safety, you should probably at least consider at rest pressure on both side (use $k_o$ for both sides) and verify your wall displacements afterwards (If you consider active pressure on the right hand side, this means your wall is relatively flexible and the soil can mobilise some of its shear stiffness). Interior systems don’t remove the clay soil, don’t remove any underground roots that can cause problems, they don’t waterproof the existing exterior cracks, water still enters, passes through the cracks and joints, all the above weakens the wall… then these screw ups remove the edge of the basement floor!
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Forces Harmful to House Foundation & Footers - Ask the BuilderAsk the Builder See, nothing much to it, you can even have a coffee or brew or smoke etc while one does a water test. Can the spell Booming Blade be affected by the Twinned Spell metamagic? After I did this I still saw the corner leaks but they didn’t appear as high as they used to. And on many of those the grade was raised and sloped away, a real ‘fine’ PITCH away. stain appears to migrate down to slab floor. Anyone want to explain to my old butt exactly how drain tiles have anything to do with the fact there were exterior cracks, cracked parging that allowed water to get in… hmmm, this and many other basements dry after we waterproofed their cracks etc, not too often did we replace ONE lone drain tile hmmm.

Why do these angles look weird in my logo? which waterproofing techniques have the lowest failure rates when subject to long term exposure of water saturated gravel? All due respect but you wanted some help, some answers on a leaky area in basement… i, some others have tried to provide that honest help and backed up what i could with other links or videos. Thus the pressure of water on a vertical wall will act through a point at a distance from the bottom, where is the depth of water. Example - Pressure acting in water at depth 1 m . will not be reduced. https://www.youtube.com/watch?v=FK6PW6AyHig) The previous homeowners in this video was told bunch of crap and bought themselves a piece of junk INTERIOR drainage system and sump, NEW DRAIN TILES!!! %���� Any drain tiles around boats? Powered by Discourse, best viewed with JavaScript enabled, hydrostatic lateral foundation wall pressure, https://www.youtube.com/watch?v=5dpGpiB7kQI, https://www.youtube.com/watch?v=AyVA73ILPUM, https://www.youtube.com/watch?v=Q7jprh5f2p8, https://www.youtube.com/watch?v=h-GaOiWZPYM, Basement Wall Failures - Donan - Forensic Engineering Experts, Forces Harmful to House Foundation & Footers - Ask the BuilderAsk the Builder, http://www.amherst.ny.us/pdf/building/soilsstudy/TOASFS_section3.pdf, https://www.youtube.com/watch?v=jLjltBxHKfU, https://www.youtube.com/watch?v=INFPk66SG1g, https://www.youtube.com/watch?v=cLzdt6wkS24, https://www.youtube.com/watch?v=AHqScpQQqZI, https://www.youtube.com/watch?v=3KFycoizC84, A Definition | Colorado Geological Survey, https://www.youtube.com/watch?v=c4Ozr64HKsc, https://www.youtube.com/watch?v=owwskmlN388, https://www.youtube.com/watch?v=FK6PW6AyHig. If you had a few cracks in the basement floor and one day you come home while its raining and see water coming UP through the floor cracks then, for me, one could call that hydrostatic pressure.

You want to believe the inside system companies, fine, all yours. For the record I agree with almost everything you have said. Every now n then we get down to them and one or a couple of them have some mud or hairline roots etc in them, not often! Determine the total pressure on the wall, if it is 10m wide. At Rest Lateral Earth Pressure: The wall may be restrained from moving, for example; basement wall is restrained to move due to slab of the basement and the lateral earth force in this case can be termed as" P m". Water pressure can be greatly reduced by providing drainage aggregate and drain pipe directly behind the wall.
In your experience what levels, if any, of hydrostatic pressure against my foundation walls should I be trying to stay under?

What prevents chess engines from being undetectable? Seems like one would need to improve performance of existing exterior perimeter footer drain tile. Let’s assume the external crack is below grade and I find a reputable company out here to properly seal it. (I know, I know… now) Anyway when I do my hose test should I pull back my plastic “foundation roof” and lay the hose on the soil right up against the wall? Then dirt covers the top and shaped to drain. There are numerous products available that do a better job.

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