Your company has won a contract to provide and compact the fill material for an earth levee, withthe dimensions shown below. The levee fill is a silty clay to be compacted at least 95% of maximumStandard Proctor of dry unit weight of 106 kN/m³ at an optimum moisture content of 18%. Yoursborrow pit has a silty clay with an in-situ density of 112.1 pcf at 18%, and a specific gravity of 2.68.When the soil is excavated and loaded on to your trucks, the void ratio of the material is e = 1.47.Your trucks cam haul 15 cubic yards of material per trip. a -) Determine the volume of fill requiredfor the leave, b -) Determine the volume required from the borrow pit20 ft3:120 ft60 ft20 ft40 ft2:1

The given data is: For borrow pit: γmoist=112.1 psf w=18% Gs=2.68 For earth Levee fill: R.C=95%…

Answered: Your company has won a contract to…

Principles of Foundation Engineering (MindTap Course List)

9th Edition

ISBN:9781337705028

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter5: Soil Improvement And Ground Modification

Section: Chapter Questions

Problem 5.1P

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Your company has won a contract to provide and compact the fill material for an earth levee (an embankment built to prevent overflow of a river), with the dimensions shown below. The levee fill is a silty clay soil to be compacted to atleast 95.1% of maximum standard Proctor of dry unit weight= 109lb/cu.ft at an OMC of 18.6%. Your borrow pit has a silty clay with an in-situ moist density of 112.6lb/cu.ft at 18.1% water content and a Gs = 2.679. When the soil is excavated and loaded on to your trucks, the void ratio of the material is e = 1.46. Your trucks can haul 401 cu.ft of material per trip. DETERMINE THE FF AND SHOW COMPELETE SOLUTION. ALL FINAL ANSWER WILL BE IN 3 DECIMAL PLACES. 1. Determine the volume of fill required for the levee in cu.ft 2. Determine the volume required from the borrow pit in cu.ft 3. Determine the required number of truck loads.
Q2/ For proposed Earth Dam fill, the soil will be compact to (95%) of standard proctor dry density. The test of borrow area indicate that (ydmax = 18 kN/m3) at optimum moisture content (11%). The soil of borrow area at natural condition has (e = 0.65) and (Gs = 2.68). Determine the minimum volume ofborrowrequired to make (600,000 m3 ) of acceptable compacted fill.
A proposed embankment fill requires 7500 m3 of compacted soil. The void ratio of thecompacted fill is specified as 0.7. Soil can be transported from one of the four borrowpits, as described in the following table. The void ratio, specific gravity of soil solids,and the cost per cubic meter for moving the soil to the proposed construction site areprovided in the table.a. Determine the volume of each borrow pit soil required to meet the specification ofthe embankment site.b. Make the necessary calculations to select the borrow pit which would be most costeffective.
In a fill section of a construction site, 1500 m3 of moist compacted soils is required. The design water content of the fill is 15%, and the design unit weight of the compacted soil is 18.5 kN/m3. Necessary soil is brought from a borrow site, with the soil having 12% natural water content, 17.5 kN/m3 wet unit weight, and Gs = 2.65. How much (in cubic meters) of the borrow material is required to fill the construction fill section? And how heavy is it?
A proposed embankment fill required 8000 m3 of compacted soil. The void ratio of the compacted fill is specified to be 0.6. Four available borrow pits are shown below along with the void ratios of the soil and the cost per cubic meter for moving the soil to the proposed construction site. Make the necessary calculations to select the pit from which the soil should be brought to minimize the cost. Assume Gs to be the same for all borrow-pit soil.
An earth dam require a total of 150 cubic meter of soil compacted with a bulk unit weight of 18.5KN/m^3 and moisture content of 10%, the specific gravity of solid particles is 2.55. Choose two out of the three borrow pits, if borrow pit 3 is automatically one of the choice. Choose the most economical choice.
The soil at a borrow area is at moisture content of 8.5%and unit weight of 17.5 kN/m3. This soil is used in the construction of a compacted road base where the dry unitweight is 19.5 kN/m3 and the moisture content is 14.0%. Ifthe finished volume of the road base is 120,000 m3, whatwould be the volume of the soil removed from the borrowpit? How much water would be added to the soil from theborrow pit?
A new construction site requires 1500 m3 of moist compacted soils. The design specification of the fill material specifies the following: Water Content 15% Unit weight of the compacted soil to be 18.5 kN/m3 Soil from borrow site has the following specification: Water Content 12% Unit weight of the borrow material: 17.5 kN/m3 Soil Specific Gravity: 2.6 How much (in cubic meters) of the borrow material is required to fill the construction fill section?
A proposed embankment till requires 5000 m of compacted soil. The void ratio of the compactedd till is specilied as 0.7. Four borroww pits are available as described in the following table. which lists the respective void ratios of the soil and the cost per cubic mcter for moving the soil to the proposed con- struction site. Make the necessary calculations to sclect the pit from which the soil should be bought to minimize the cost. Assume G, to be the same at all pits.
A fill of volume 150000 cum is to be made of void ratio 0.8. The void ratio of borrow pit soil is 1.4. Find volume to be extracted.
The subgrade is 72 feet wide at the top and is 9 feet thick. It has a Specific Gravity, Gs =2.66, a final porosity of 31.0% and a degree of saturation of 86.3%. It is coming from aborrow pit with an average total unit weight of 112.6 pcf and a water content of 8.0%.How many pounds of water must be added to the borrow material for the fill? How manycubic feet of borrow must be excavated? (Hints: Draw two phase diagrams, one for theembankment and one for the borrow pit. What is common between the conditions?(Intermediate Answer, This is not a given, but a value so you can check your work as youprogress. Ww in borrow pit = 43,100,000 pounds )
Why does the smooth-drum rollers are not well suited for compacting earth fill?

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