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…

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter3: Weight–volume Relationships

Section: Chapter Questions

Problem 3.24P

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The embankment for a highway 5097 ft long, 104 ft wide and 6 ft in compacted thickness is to be constructed from a sandy soil trucked from a borrow pit. The water content of the sandy soil in the borrow pit is 6.748% and its porosity is 0.422. The specification requires the embankment be compacted to a dry unit weight of 122.874 lb/ft3. The specific gravity is 2.588. Determine the following: a. Total weight of the soil solids, kips. b. Total volume of the soil required from the borrow pit, ft3. c. Weight of water to be added per foot length of the embankment to reach 10% moisture content, lb.Round off answers to three decimal places.
The embankment for a highway 5097 ft long, 104 ft wide and 6 ft in compacted thickness is to be constructed from a sandy soil trucked from a borrow pit. The water content of the sandy soil in the borrow pit is 6.748% and its porosity is 0.422. The specification requires the embankment be compacted to a dry unit weight of 122.874 lb/ft3. The specific gravity is 2.588. Determine the following: a. Total weight of the soil solids, kips. b. Total volume of the soil required from the borrow pit, ft3. c. Weight of water to be added per foot length of the embankment to reach 10% moisture content, lb.
5. An embankment for a highway will be constructed from a soil. To construct the embankment, the total weight of the soil from the borrow pit is 500000 kN. The water content of the soil in the borrow area of 14% and the bulk unit weight is 16 kN/m³. The soil in the embankment will be compacted to a dry unit weight of 17.5 kN/m³. The specific gravity of the sandy soil is 2.67. (a) Determine the volume and weight of the soil in the embankment. (b) If the soil in the embankment becomes saturated after construction, what is the new water content of the soil?
A 4 m high embankment with a top width of 5 m and side slopes of 1:1, has to be constructed by compacting soil from a nearby borrow pit. The unit weight and natural moisture content of the soil are 1.8 tons/m3 and 8% respectively. Determine the quantity of water to be added to it for every kilometer of finished embankment, if the required dry density and moisture content of the embankment soil be 1.82 g/cm3 and 18%. Given G= 2.70.
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.
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; (a) Dry unit weight of borrow pit material.(b) Volume of the finished embankment.(c) Volume of borrow pit soil required.
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;(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.
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.
3. An embankment with a total volume of 30,000m3 is to be constructed as part of a highway project. The soil to be used in the embankment will come from a borrow pit where the average moist unit weight and water content of the soil is 17.6kN/m3 and 13% respectively. Assuming that the soil will be compacted to a dry unit weight of 18.2kN/m3 at a moisture content of 16%. a. Compute the weight of dry soil required. b. Compute the volume of borrow required. c. Compute the total quantity of water in cubic meters that must be added to the fill during compaction to bring about a desired final moisture content of 16%.
4. An embankment for a highway will be constructed from a soil. The total volume of the embankment is 20,000 m³. The soil in the embankment will be compacted to a dry unit weight of 18 kN/m³. The sandy soil will be obtained from a borrow pit. The water content of the soil in the borrow area of 16% and the bulk unit weight is 17.5 kN/m³. The specific gravity of the sandy soil is 2.7. (a) Determine the volume and weight of the soil from the borrow pit required to construct the embankment. (b) If the soil in the embankment becomes saturated after construction, what is the new water content of the soil?
An embankment will be constructed from borrowed Soil. The cross section of the embankment is shown in Exhibit 10.10. The soil in the embankment has to be compacted to a dry unit weight of 108 lb/ft³ at a moisture content of 14.5%. The borrowed soil will be brought in 10 cubic-yard truck loads. The borrowed Soil has a void ratio of 1.1. Given: specific gravity Of Soil Solids, Gs=2.68. The volume of excavation needed at the borrow site for construction of each 100' length of embankment is most nearly: 1 a) 4144 yd ³ b) 5260 yd3 c) 3550 yd3 d) 4890 yd³ 25ft 15ft Exhibit 10.10
Refer to Figure 2. Embankments are generally constructed in several layers that are compacted according to geotechnical specifications.layers that are compacted according to geotechnical specifications. The thickness of eachof each layer is 3ft and should have a dry unit weight of 118 lb/ft3 .. It is known that theThe soil used in the embankment has a wet unit weight of 111 lb/ft3, moisture contentmoisture content of 23%, and Gs = 2.67. Complete the following tasks:(a) Determine the wet weight of the soil required to construct the first layer.(closest to the foundation soil) per foot (ft) of the embankment.b) On the day of construction there was a heavy rain that caused the soil used to reach a nearly saturated condition.used to reach a near saturated condition. Recalculate the wet weightwet weight of soil required to construct the first layer.

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