Problem 15: A proposed earth dam project will contain 7,000,000 m of compacted earth fill having a porosity of 0.4. There are three quarry pit sites nearby A, B and C. It is required to determine the most economical solution to this construction project based on the overall transport cost. Transport Cost S/tonne Bulk density kg/m³ 1950 2000 Pit Site Void ratio 1.24 1.05 0.31 0.34 A 1.16 0.33 2140

Problem 15: A proposed earth dam project will contain 7,000,000 m of compacted earth fill having a porosity of 0.4. There are three quarry pit sites nearby A, B and C. It is required to determine the most economical solution to this construction project based on the overall transport cost. Transport Cost S/tonne Bulk density kg/m³ 1950 2000 Pit Site Void ratio 1.24 1.05 0.31 0.34 A 1.16 0.33 2140

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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Consolidation test results are provided below, (Hint: C, or C = Ae / log(of/ai') ): 1.2 1.1 1- 0.9 Void ratio 0.8 0.7 0.6 0.5 0.4 1 10 100 1000 Vertical stress (kPa) (log scale) In some of the results an interval is provided. It ccan be possible to get a result between the given values Use the plot and find pre-consolidation pressure (past maximum vertical effective stress) pe' according to Casagrande's method. pe'= .kPa Seç. Find C, Seç. Find C.: Seç. If the tested soil sample is taken at a depth of 5m (ysat=18kN/m) where the groundwater table is located at the surface what is the Over Consolidation Ratio(OCR) (OCR= pclo vo) Seç. Initial height of the specimen is 22mm. What is the final height of the specimen when effective vertical stress is 650kPa? Hint: Use void ratio. Seç. (Result is in mm) What is the consolidation settlement of 2m thick clay layer if initial effective stress is 20kPa and final effective stress is 400kPa. Hint: Poc= Seç. [Ho/(1+einit)]x[C,log(p'/o'init) +…
Data Sieve Sieve No. Opening (mm) 4 4.750 10 2.000 20 0.850 30 0.600 40 0.425 60 0.250 140 0.106 200 0.075 Pan Mass of soil retained on each sieve, W (grams) 0 40.2 84.6 50.2 40.0 106.4 108.8 59.4 8.7 Percent of mass retained on each sieve. R Cumulative percent retained, Σ Rn Percent finer, 100 – Σ Rn
On the construction side, there is soil material of volume 3,853 cubic feet. A truck with a load capacity of 15 cubic meter will be used to transfer this soil. How many times you need to use this truck to move this volume of soil? Your answer must be an integer. 7.
A truck is hauling earth from a construction site. The truck has the following specifications: Maximum allowable gross vehicle weight 37,800 lb Empty vehicle weight 10,800 lb Heaped capacity 12 yd 10 yd Struck capacity Haul time to dump area, including load, haul, return, and dump times 17 min Delay time 5 min/hr The soil has the following characteristics: Bank density Loose density 110 pcf 100 pcf The productivity, in bank measure (yd/hr), of this operation is most nearly: 38.8 (В) (C) (D) 35.3 32.3 29.5
Will a grit particle with a radius of 0.10 mm and a specific gravity of 2.65 be collected in a horizontal grit chamber that is 13.5 m in length if the average grit-chamber flow is 0.15 m³/s, the width of the chamber is 0.56 m, and the horizontal velocity is 0.25 m/s? Hint: Use the data below V's = g S-1] 18 DE 12UP , v=0.959 x 106 m²/s
A pit of volume 16x104 cum is to be filled in such a way that its void ratio comes out to be 0.75. If the soil to be borrowed has void ratio of 1.5 then determine the volume that should be extracted.
A sample o f soi l compacte d accordin g t o a standar d Proctor test ha s a unit weight of 130.9 lb/ft 3 at 100 % compaction and at optimum water content o f 14% . What is the dryunit weight? If the voids become fille d with water what would be the saturated unit weight?Assume Gs = 2.67.
A soil specimen has a total volume of 70 cm3 and a total mass of 135.5g. After complete drying in an oven, the specimen has a mass of 122.0g. The Gs is 2.60. Determine the void ratio. Report your answer to three significant figures, and draw the full phase diagram.
Q1. Discuss the following regarding compaction and consolidation a. Results of both b. Difference between both c. can compaction of earth be achieved by cosolidation? why/why not?
Q# 2. The following are the results of a consolidation test on a sample of a clayey soil Pressure, o' (kN/m²) 1.116 25 1.108 50 1.055 100 0.962 200 0.845 400 0.755 800 0.65 1600 0.658 800 0.675 400 0.685 200 a Plot the e, log o' curve. b. Using Casagrande's method, determine the pretonsolidation pressure. Calculate the compression index, C, and the ratio of C/C. C. (Note: Use excel for calculation and drawing. Discuss the details in your own words.)
2.2/Multiple choices. Select 10 only: - (2 1. 1. In thi land Paleta anania r 2. WHICH.. ****** Q lange Ca J www.por 7. Fissile or foliated metamorphic rocks are mono mineral or multi minerals? 8. Which one has more water contain, clay or mari? 9. Which one has not water molecule, gypsum or anhydrite? 10. Concentrated closed circles contours with highest value in the center, is it basin or dome? 11. Paramagnetic minerals are attracted to magnet or not?
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