An embankment for a highway 30 m wide and 1.5 m thick is to be constructed from sandy soil, trucked in froma borrow pit. The water content of the sandy soil in the borrow pit is 15% and its void ratio is 0.69.Specifications require the embankment to compact to dry weight of 18 kN/m3. The length of the embankmentis 1 km.What is the number of 10 m³ of truckloads of sandy soil required to construct the embankment? Assume thatGs=2.7.617O 1584O 5169O 8671

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Answered: An embankment for a highway 30 m wide…

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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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 following;(d) Volume of the borrow pit material required considering swell. (e) The number of truckloads of sandy soil required for the construction. The full capacity of each truck is 22.2m3, and local government regulations require a maximum capacity of 90%. (f) The weight of dry soil in one truckload.
Do not attempt if not sure. It is required to deepen a lake by 1.50 m over an area of 50m * 150m There is water to a depth of 1.0 m in the lake. The unit weight of the soil at the bottom of the lake is 19.5kN / (m ^ 3) and the specific gravity of the soil grains is 2.70. What is the in situ water content of the soil at the bottom of the lake? It is proposed to lower the water table to the ground level and carry out the required excavation. The soil removed will be air dried and placed as compacted fill in a nearby earthwork, at dry unit weight of 18kN / (m ^ 3) What would be the height of the compacted fill, when the soil is placed over an area of 100m * 100m ?
A layer of fine sand exists over a stratum of impervious rock. The sand layer is 6.25m thick. The site is flooded and the water surface is 1.25m above the surface of the sand. It is proposed to excavate a very wide ditch through the site and to remove sand to a depth of 2.5m below the existing surface of the sand. One side of the excavation is to be supported by sheet piling driven to a depth of 4.4m below the existing surface of the sand. Draw a flow net and determine the seepage in m³/min per m length for the sand with a permeability of 0.18m/sec.

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