Principles of Foundation Engineering (MindTap Course List)
9th Edition
ISBN: 9781337705028
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Chapter 5, Problem 5.5P
(a)
To determine
Find the number truck loads needed to construct the fill.
(b)
To determine
Find the remaining volume of the pit in the borrow area after the removal of required material.
(c)
To determine
Find the volume of water required to be added per truck.
(d)
To determine
Find the saturation water content of the fill.
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A proposed earthen dam will contain 5,000,000 m3of earth. Soil to be taken from a borrow pit will becompacted to a void ratio of 0.78. The void ratio ofsoil in the borrow pit is 1.12. Estimate the volume ofsoil that must be excavated from the borrow pit. Include phase diagrams.
Two specimens of clay A and B are
tested in a consolidated apparatus. If:
(mv) A = 3.6 x 10-4 m²/kN
(m₂) = 1.8 x 10-4 m²/kN
B
(C₂)A = 3.8 x 10-4 cm²/s
(C₂) A = 1.9 x 10-4 cm²/s
then the ratio KA / KB is equal to
QUESTION 1: PHASE RELATIONS
a. The bulk unit weight and water content of a soil at a borrow pit are 17.2 kN/ml and
8.2% respectively. A highway fill is being constructed using the soil from this borrow
at a dry unit weight of 18.05 kN/m³. Find the volume of the borrow pit that would make
one cubic meter of the finished highway fill.
b. A soil to be used in the construction of an embankment is obtained by hydraulic
dredging of a nearby canal. The embankment is to be: placed at a dry density of 1.72
t/m³ and will have a finished volume of 20,000 m³. The in situ saturated density of the
soil at the bottom of the canal is 1.64 t/m³. The effluent from the dredging operation,
having a density of 1.43 t/m³, is pumped to the embankment site at the rate of 600 L per
minute. The specific gravity of the soil grains is 2.70.
i.
ii.
How many operational hours would be required to dredge sufficient soil for the
embankment?
what would be the volume of the excavation at the bottom of the canal?
c. A…
Chapter 5 Solutions
Principles of Foundation Engineering (MindTap Course List)
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Similar questions
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- For a given soil, derive the following relation by drawing the three-phase diagram: Given: Yt = Gs Yw (1 − n) (1 + w) W Yt = Gs Yw (1 − n) (1 + w) Required Derive the following Relationarrow_forwardResults from liquid and plastic limit tests conducted on a soil are given below. Liquid limit tests: Number of blows, N Moisture content (%) 14 38.4 16 36.5 20 33.1 28 27.0 Plastic limit tests: PL = 13.4% a. Draw the flow curve and obtain the liquid limit. b. What is the plasticity index of the soil? © Cengage Learning 2014arrow_forwardSand cone equipment is used to perform a field density test on a compacted earth fill. • Soil sample dug from the test hole = 20.60 N • Dry weight of soil sample = 17.92 N Ottawa sand used to fill the hole weighs 16.05 N and is known to have a density of 15.74 kN/m³. Determine the volume of the test hole. Answer:arrow_forward
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- A fill having volume of 150000 m³ is to be constructed at a void ratio of 0.8. The borrow pit solid has a void ratio of 1.4. The volume of soil required to be excavated from the borrow pit will be (a) 150000 m³ (c) 250000 m³ (b) 200000 m³ (d) 300000 m³arrow_forwardin an earthen embankment under construction the bulk unit weight is 16.5 kN/m³ at water content of 11%. If the water content is to be raised to 15%, compute the quantity of water required to be added per cubic meter of soil? Assume no change in the void ratio.arrow_forwardSelect the best answer and show your solution 1. If a soil has specific yield of 5% ,how much water could be drained over an area Of 14,000 sq m if the water table drops 1.5 m a. 1050 cu m b. 1054 cu m 1052 cu m d. 1055 cu m c.arrow_forward
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