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Soil suction is zero at the phreatic surface. This is the point where the pore water pressure is equal to the pore air pressure. Above this surface pore water pressure becomes increasingly negative compared to pore air pressure and as such matric suctions develop. Below the phreatic surface the pore water pressure becomes increasingly positive and the pore spaces are totally saturated.
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What is coefficient of consolidation?
Coefficient of consolidation (Cv) is a measure of time it takes for a soil to consolidate during the lab test.
What is the main purpose of compaction testing in geotechnical engineering?
The main purpose of compaction testing is to find the optimum moisture content of a soil. The optimum moisture content is that which will give the maximum dry density (and hence maximise shear strength and bearing capacity, as well as reducing settlement, porosity and permeability).** This reduction in permeability will effect the time taken for excess pore pressures to dissipate and so will have an effect on the time taken for consolidation to occur.Source:Craig, R.F. (1997). Soil Mechanics. Sixth Edition. Chapmen & Hall, London.
What is plate bearing test and what is it's relevance for bearing capacity of soil?
it is measure in p.s.i. ( presure / square inch) to see if the compounds will with-stand an amount of presure over a lenght of time in order to determine satisfatory use of material or change it
Define soil stabilization for building foundations?
This is a step most builders and doityourselfers do not spend enough time on. Let's say your lot is wooded. After the trees are removed the soil is broken up and raked for as much as 2' or more. Some stumps can go as much as 6' into the ground. This ground needs to be compacted before you put a foundation on it. Or, it will compact after, causing unwanted settling of your foundation. Don't let the dozzer driver tell you he compacted with the dozzer the reason dozzers can travel on mud where you cannot walk is because the tracks dissipate the weight out over a larger surface. The ground needs to be compacted in layers. Wet ground will not compact... people pour slabs on mud all the time. A drying agent must be added or it will have to be dryed over time. Some soil which has a high plasticity index (PI) will need to be excavated and good select fill brought in and compacted. Another option for this problem would be to have drilled bell bottom piers incorporated into your foundation design. Bottom line is your foundation needs to be designed by an engineer and those instructions followed by a builder who does not cut corners... Good luck with that one!
What is load bearing structure?
the ability of a structure simple or complex (bridge?) to maintain its entegrity without failure for a designed length of time when placed under stress. a gravel road that could handle cars but not semis. maximum weight to an object without failure.i
I would not expect i?
I would not expect it to get worse over time. The symptoms may last for awhile or go away on their own over time.
What would you expect to be dangerous in the jursassic time?
dinosaurs
How would you compare young soil to soil that has been around a long time?
I don’t know
How would you expect the standard of living to do over time?
Increase
When you roll a 10 sided die about what fraction of the time would you expect a multiple of 3 to come up?
You would expect it 0.3 of the times.
What kind of changes would you expect to see in an ecosystem over time?
you would expect that the populations of animals are increasing or decreasing or because of no rainfall the plants will get dried.
Will a seed grow faster in a cotton or will it grow faster in soil?
it would grow faster in wet cotton than in wet soil soil , as cotton would retain adequate water for a longer period of time than soil .
How can you get a suction cup to hold for a long time?
Spit and push
Would you expect the standard of living to increase or decrease over time?
Increase
Would you expect one 1000Mg vitamin C tablet or two 500Mg tablets to take more time to release the vitamin C?
You would expect one 1000mg to take more time to release the vitamin C.
Who would use a soil thermometer?
Someone with too much free time.
Is it possible to glue suction cups to hands and feet and climb walls?
No, because your skin moves all the time and there would be too much pressure on it.
