Hello, I’m currently studying for my FE Civil exam and going over Geotech material. When classifying soils using USCS, after you’ve determined the soil is a fine-grained soil, how can you know if the soil is organic or inorganic?
Absolutely Yes, factors of seepage are very important to determine before the construction of a dam or even after the construction of the dam for maintenance work. Electrical resistivity method is used to determine the amount of seepage and depth of seepage. As a civil engineer, it's our responsibilRead more
Absolutely Yes, factors of seepage are very important to determine before the construction of a dam or even after the construction of the dam for maintenance work.
Electrical resistivity method is used to determine the amount of seepage and depth of seepage.
As a civil engineer, it’s our responsibility to provide higher safety.
Seepage under the embankment is very much dangerous as compared to concrete dams because embankments are built on a very soft material which is easily scoured and it is very vulnerable for the influence of water.
On other side concrete dam, is built on hard strata and even the defective dam which not the endangered by passing of water from the underside.
Following are the methods for controlling seepage
- Providing drainage
- By reducing the seepage with some proper methods.
- Largely use of filters for preventing the piping and heave
Kuldeep Singh
There are a few parameters that you can use to judge whether a soil is organic or inorganic. Organic soils have fairly lower bulk densities than inorganic soils (0.2 to 0.3 as compared to 1.2 to 1.5). Organic soils will feel significantly lighter. Organic soils can retain way more water than inorganRead more
There are a few parameters that you can use to judge whether a soil is organic or inorganic.
Organic soils have fairly lower bulk densities than inorganic soils (0.2 to 0.3 as compared to 1.2 to 1.5). Organic soils will feel significantly lighter.
Organic soils can retain way more water than inorganic soils (in proportions if their own densities).
The color of organic soils is usually darker than inorganic soils. But this is not a good parameter for comparison since the color is affected by other things as well apart from organic nature.
Cation exchange capacity (CEC) is higher in organic soils (4 times as that of inorganic soils). This means that organic soils will have a lower pH, higher exchangeable hydrogen, more calcium and magnesium ions, and higher exchangeable calcium content.
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