Falling Head Permeability Test | Procedure and Data Analysis
This video shows how to perform a falling head permeability test for fine-grained soil. This test is typically performed on fine-grained soil with low permeability. The soil sample must be first saturated, which takes several days so that a laminar steady water flow is established. The test takes only a few minutes, it is necessary to measure the amount (volume) of water over time. Darcy's law is then used to estimate the coefficient of permeability. Watch this video to learn how to use the data from this test to estimate the water flow under a structure • How to Draw CORRECT Fl... . The fundamentals of water flow in soil mass including liquefaction and quick conditions are described in this video • Explanation of Water F... , while the principles of vertical water flow in soil are explained using a practical example in this video • Vertical Water Flow in... .
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Пікірлер: 26
How can i give you 1000 likes for demostrating it in amazing way
Amazing.. luar biasa... 👍👍👍
Great person and interesting work
very helpful and nice demostration,
Thank you Sir for your valuable explanation and clear concept conveyance ! #KEEP UP THE GOOD WORK💐 😃🍫
Wow sr you did great job😁
Thanks for sharing this very good explanation sir~
Thank you 🤩
It is helpful me sir So I thanks for kind information
Nice video st
Thanks
may I know which standard was used to tabulate the data, sir?
There are three coefficients of permeability (k) based on three differnt experiments with different sizes of manometer tubes. They are not the same (k = 1.1E-06, 1.4E-06, 2.3E-06). Which value does represent the coefficients of permeability for the soil sample? Should they be averaged?
@GeoEngineeringandScience
2 жыл бұрын
Yes, you will take the average value
Very interesting work. If it is a sample with large porosity, can this method be used?
@mongimene1314
2 жыл бұрын
The Constant head is more suitable for coarse-grained soils
Shouldn't the first test be 152 seconds? Because then the value for k1 would be 0.0014 which is much more like the others.
👍
can you post a link for the mold/cage in this video?
@GeoEngineeringandScience
2 жыл бұрын
The mould is commercially available, you can probably find links on the Internet. I don't have one.
sir what is the is the reference of the test procedure that you use ?
@GeoEngineeringandScience
3 жыл бұрын
Australian Standard AS 1289 6.7.1-2001. Method of testing soils for engineering purposes: Method 6.7.1 Soil strength and consolidation tests - Determination of permeability of a soil - Constant head method for remoulded specimen. (2) Australian Standard AS 1289 6.7.2-2001. Method of testing soils for engineering purposes: Method 6.7.2 Soil strength and consolidation tests - Determination of permeability of a soil - Falling head method for remoulded specimen.
Please share Excel sheet .. observation and report.
@GeoEngineeringandScience
2 жыл бұрын
I will try to do it in the future when time permits
How you calculated 'a' ?
@thundergaming7206
5 ай бұрын
From diameter of small tube