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Questions tagged [soil]

Questions related to the use of soils in engineering, as a material, or as object of research. Some common uses in Civil engineering are as surface for water flow, for foundations, as part of pavement structure, as seepage medium, or as origin of loads over other structures. Other uses in ...

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What diameter of particles will result in a blocked borehole?

My mine is looking to install a 600 mm open borehole to drop particles up to 150 mm through. It's a 320m shaft to drop ballast down to save time compared to using the drift. When it gets blocked ...
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How would you calculate the force needed to rotate along the x axis vertical earth anchor in dirt?

I'm a high school student who hasn't had the pleasure of taking physics yet, so forgive me if the answer is obvious. The problem I have involves an earth anchor drilled vertically into the earth. I ...
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Liquid Limit of Soil through Atterberg Tests

My lab is evaluating the liquid, plastic, and shrinkage limits of some soil samples and we are following this video provided by the Missouri University of Science and Technology. The video indicates ...
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Is it possible to reuse or the oil recovered from a spill?

I don´t know if this is the rifght place to ask this question, but I would like to know if after the remediation of a soil contaminated with hydrocarbon you can reuse or even sell the oil recovered. ...
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Effect of drawdown of water

My textbook has the following question: Determine the factor of safety (in regard to cohesion only) for a submerged embankment 30.5 m (100 ft) high whose upstream face has an inclination ...
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1answer
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Why is this construction site pouring gravel over a wire mesh, and then covering it with dirt?

My office is afforded a prime view of a construction project where the workers are currently covering the leveled ground in a wire mesh, raking gravel across the entire mesh, and then covering that ...
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Cut in slope pore water pressure

https://imgur.com/a/YFPzR https://imgur.com/a/SgkR0 https://imgur.com/a/ZNrdR In the notes , I cant understand that why as the pore water pressure dissipated , the shear strength of soil will ...
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Is possible for a silt soil to be compacted hard as a rock?

I had been told that a silt soil, when professionally compacted (from all the laboratory essays to the compaction with a vibratory roller), ends hard as a rock, and when hit with a metal bar it makes ...
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What is a safe soil load to avoid settlement?

For residential design, looking at IBC 2012 Table 1806.2 it seems a safe soil load to design for is 1500 psf if you want to save time and cost isn't yet an issue. (assuming you're not building on a ...
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2answers
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What is the physical meaning of Cumulative Passing% in Grain Size distribution?

When preforming a grain size distribution on a sample of Soil using Mechanical Sieves (e.g. Sieve #4 and sieve #10 and sieve #40) one of the necessary calculation need for drawing the particle size ...
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Soil Yield Surface Invariant Question

The Desai yield surface is given by $$F=\frac{J_2}{p_a^2}-[-\alpha*(\frac{I_1+R}{p_a})^n+\gamma*(\frac{I_1+R}{p_a})^g]*F_s$$ $$F_s=[1-\beta cos(3\theta)]^m$$ where $\alpha,\gamma, n, g, m$ are ...
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Total lateral pressure from clay soil when hydrostatic pressure is also present

I'm stuck with how to work out the total pressure and centre of pressure in this example. At an outdoor boundary between two properties there is a stepped change in ground level of the clay soil. The ...
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How to derive Darcy's law only in the case of saturated soil without derived all cases?

How to derive Darcy's law only in the case of saturated soil in mathematical/theoretical way without having to derive all the cases? I can only find the generalized theoretical proof for all cased ...
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How does excess water makes soil compaction more difficult?

I understand how water content helps compaction, by being kind of a lubricant between the soil particles, that helps them slide into position. But I don´t really understand how it starts affecting ...
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1answer
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What paint/spray on material should I use to insulate a metal pole?

I am not entirely sure if this is the correct forum to ask this question so please refer me on if there is a better arena. I am creating a small weather station and I wish to measure soil ...
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1answer
674 views

How to determine the lateral earth pressure in a double-walled cofferdam?

The design of a retaining wall commonly involves determining the lateral earth pressure using either Rankine theory or Coulomb theory. Both theories involve mobilising the shear resistance of a ...
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2answers
142 views

How are the structural properties of intentionally frozen soil determined?

Soil freezes naturally all of the time. It is at this point that dirt work usually stops. Occasionally soil is intentionally frozen to improve its structural properties. This process has been used ...
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What is the unbraced length of a pile in soil?

When analyzing a pile or drilled shaft as a beam-column, how do you determine the unbraced length of the portion that is in the ground? Typically, the braced points on a beam or column are well ...
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Soil swelling and mass/volume relationships

Given moisture content, Specific gravity of solids, initial volume, and weight. I'm asked to compute the moist unit weight, dry unit weight, and degree of saturation of this compacted soil. This is ...
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1answer
164 views

Settling of unevenly loaded storage tank

Suppose I have a concrete tank, round, vertical, diameter in the range 16m-24m. One half the floor is filled with gravel or concrete to a height of maybe 2 meters. When the tank is empty, that will ...