An embankment for a highway 35 m long and 1.6 m in compacted thickness is to be constructedfrom a sandy soil trucked from a borrow pit. The water content of the sandy soil in the borrow pit is15% and its void ratio is 0.69. The specification requires the embankment to be compacted to a dryunit weight of 18 KN/m³, specific gravity of soil is 2.7. For a one-kilometer length of embankment,compute:a) Volume of the borrow pit soil required to construct the embankment|b) Determine the weight of water per truck load of sandy soil, if the capacity of a one truck load is10 m3.

FInd the dry densityγd=Gγ1+eγd=2.7×9.81+0.69=15.7kNm3

Answered: An embankment for a highway 35 m long…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Embankment is to be built with 15 km length of proposed road with 2 m height of road embankment. The cross sectional area of embankment and distance of borrow pit from embankment are 30 m² and 10 km respectively. Soil is to be compacted to 97 % of the max dry density. Information given as follows: (a) Results from laboratory compaction test: Max dry density-1.80 Mg/m³ Optimum water content=12% (b) Borrow material: Dry density-1.70 Mg/m² Water content-8% Calculate volume of additional water required for the entire volume of the embankment Final answer should be = 27, 486 m³
An embankment for a highway 30 m wide and 1.5 m in compacted thickness is to be constructed from sandy soil trucked from a borrow pit. The water content of the sandy soil in a borrow pit is 15% and its void ratio is 0.69. The swell index is 1.2. The specification requires the embankment to be compacted to a dry unit weight of 18kN/m^3. Determine, for a 1-km length of embankment, the ff; (g) The weight of water per truckload of sandy soil. (h) The degree of saturation of the sandy soil in situ. The dry density of sand with a porosity of 0.387 is 1600 kg/m3. Find the following; (i) The void ratio of the soil. (j) The specific gravity of the soil solids.
On the profile shown in the figure, two large embankments will be built at an interval of 6 months. The first embankment will be 1m high and the second 2m high. Both will be built with local soil and will reach a specific weight after compaction of 18.1kN/m³. Estimate the primary consolidation settlement considering the coefficient of compressibility av=1x104 m²/kN. €=0.9 H=7m argila e-0.9 7m
How to solve this question? A soil has a dry density of 1.84 g/cm3 and void ratio of 0.45. Calculate the factor of safety against quick sand condition if the hydraulic gradient is given as 0.46.
An elliptical artificial island has a major axis of 10km and minor axis of 7.5 km. A breakwater, 100m thick, forms the edges of the island. The area within the breakwater is to be filled with sand. The sand in its loosest state of porosity is 90% and the desired porosity when compacted is 20%. Assume the average thickness of completed island is 100m. Determine the quantity of the sand requured.
In the construction of a levee by compacting soil excavated from a borrow area to dry of 1.78 g/cc,to make the compaction process more workable,an optimum water content of 15% is necessary. However the natural moisture content and bulk density of the soil were 9% and 1.83g/ cc respectively. Find out the quality of water to be added for every 100 m cube of finished embankment.
The length of the levee perpendicular to the paper is 600 m; the sand on top and bottom have k1=750 ft/day and k2= 40 in/s respectively. The thickness of sands is equal, m = 670 m, n=575 ft, B = 8ft, C = 525 ft. Determine the amount of water flowing to the ditch in in3/min. (See picture below)

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