3.24 Refer to the 15-ft high embankment shown in Figure 3.8. Embankments aregenerally constructed in several lifts or layers that are compacted accordingto geotechnical specifications. Each lift thickness is 3 ft and must have a dryunit weight of 118 lb/ft. It is known that the soil at the borrow pit has a moistunit weight of 111 lb/ft5, moisture content of 23%, and G, 2.67. Perform thefollowing tasksa. Determine the moist weight of borrow soil needed to construct the firstlift (bottom layer) per ft of the embankmentb. On the day of the construction, there was a heavy rain that caused theborrow pit to reach a near saturated condition. Recalculate the moistweight of the borrow soil needed to construct the first lift 25 ftiV: 2H1V : 2H15 ftFigure 3.8

Answered: 3.24 Refer to the 15-ft high embankment…

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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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.
Solve with complete solutions and explain. An embankment for a highway 30 m wide and 1.5 m 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 15% and its void ratio is 0.69. The swell index is 1.2. The specification requires the em-bankment to be compacted to a dry unit weight of 18 kN/m3. Determine, for a 1 km stretch of embankment, the weight of sandy soil from the borrow pit required to construct the embankment, the number of truckloads of sandy soil required for the construction. The full capacity of each truck is 22.2 m3 and local government policies require a maximum loaded capacity of 90%, the weight of water per truckload of sandy soil and the degree of satu-ration of the sandy soil in situ.
An embankment for a highway 30 m wide and 1.3 m in compacted thickness is to be constructed from a sandy soil trucked from a borrow pit. The water content, w, of the sandy soil in the borrow pit is 17% and its void ratio, e, is 0.75. The specification requires the embankment be compacted to a dry unit weight of 19 kN/m^3. Determine, for 3 km length of embankment. Assume Gs = 2.7 a) Compute the volume (m³) of borrow material required b) solve the cost of fill if the earth fill from borrow site costs Pho 150/m³ c) calculate the volume (m³) of borrow material required is the specification required a void ratio of 0.20
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.
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 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; (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 35 m long and 1.6 m 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 15% and its void ratio is 0.69. The specification requires the embankment to be compacted to a dry unit 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 is 10 m3.
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
An embankment for a highway is to be constructed from a soil compacted to a dry unit weight of 18kN/m3. The clay has to be trucked to the site from a borrow pit. The bulk unit weight of the soil in the borrow pit is 17kN/m3 and its natural water content is 12.3%. Calculate the volume of clay from the borrow pit required for 1m3 of embankment. Assume G=2.7.
Ql- An embankment is to be constructed over a layer of soft clay 16 m thick as shown in figure 1. Construction the embankment will increase the total vertical stress in the clay layer by 110 kPa. The design requirement is that all but 25 mm of the settlement due to consolidation of the clay layer will have taken place after 6 months. Determine: A. The spacing in best pattern of 500 mm diameter sand drains to achieve the above requirement. B. Which is the best, the use of sand drains or pre-fabricated drains? Why? (25%) Embankment Clay Cy = 4.7 m2/ year Ch = 7.9 m2/ year mv= 0.25 m2/ MN 16 m Sand Figure (1).
An embankment for a highway 35m wide and 1.2m 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 15% and its void ratio is 0.72. the specification requires the embankment to be compacted to a dry unit weight of 18.2 kN/m3. Length of embankment is 2.5km. Assuming G = 2.7, determine the volume of borrow material required.

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