For a 4-m thick sandy soil deposit, laboratory tests indicate that its minimum and maximum void ratios are 0.43 and 0.86, respectively. Its relative density is 56%, and its specific gravity is 2.66. Yd-max Obtained by Standard Proctor Test is 18.31 kN/m³. The specification calls for relative compaction of 95%. Answer the following questions. a) What is the void ratio of this soil deposit? b) What is the dry unit weight (in kN/m³) of this soil deposit? c) What is the dry unit weight (in kN/m³) of the compacted soil?

Q: A sand cone equipment is used to perform a field density test on a compacted earthfill. Weight of…

A:

Q: Assume that the compressible soil shown in Figure 1 consists of a clay layer 10 ft thick. A…

A: Initial void ratio (eo) = 1.10Saturated Densityνsat =  115 lb/ft2Existing over burden pressure(po) =…

Q: Estimate the vertical coefficient of permeability for a uniform clay deposit where representative…

A: Given data: Liquid Limit = 92 Plastic Limit =34 Void ratio = 1.75 clay fraction = 0.4

Q: Problem 7: A 3-m high sandy fill material was placed loosely at a relative density of 55%.…

A: Height of sandy fill (H) = 3m Relative Density before compaction (RD1) = 55% Relative Density after…

Q: The degree of saturation of a soil is 55% and the moist unit weight is 16.66 kN/m3. When the moist…

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Q: 2. The void ratio of a soil is 1.2. Determine the buik and effective unit weights at, first 75%,…

A: A mixture's void ratio is the volume of voids divided by the volume of solids. The void ratio is the…

Q: A loose uncompacted sand fill 5 ft in depth has a relative density of 40%. Laboratory tests…

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Q: The maximum and minimum void ratios for sand are 0.805 and 0.501 respectively. The field density…

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Q: Modified Proctor compaction test results for excavated soil at a construction site indicated that…

A: Solution:

Q: c. Recall that the natural moisture of the soil is 36.4%. Consider that the following properties…

A: Natural moisture of the soil (W) = 36.4%Specific gravity, Gs = 2.62Unit weight of water, w = 9.81…

Q: with all-round pressure of 200 kPa has been solidified to a specific volume of 1.9. The second clay…

A: Given:- all round pressure=200kPa specific volume=1.9 all round pressure=600kPa expand to…

Braced cuts

The braced cut is a method of providing lateral support to the soil in foundation trenches, to prevent the trenches from deformation by the caving in of soil and resisting it from moving laterally. During shallow excavation in firm soil, generally, slopes are provided to resist the caving in of soil. During shallow excavation in soft soil and deep excavation, the chances of caving in of soil increase. Hence, it becomes necessary to make a provision to resist the deformation of trenches due to caving in of soil. The braced cut is the method used for such conditions. The excavation using braced cuts is a bit uneconomical as compared to the traditional open-cut excavation method but provides better safety than the cut excavation method.