Q: A proposed earth dam requires 7500 m of compacted soil with relative density of 94% , maximum void ratio of 0.73, minimum void ratio of 0.4 and specific gravity (Gs) = 2.67. Two borrow pits are available as described in the following table. Choose the best borrow pit with minimum cost. Degree of saturation (%) 82 Borrow Pit Water content (%) Cost ($/m) A 18.43 10 В 100 24.34

Q: A proposed earth dam requires 7500 m of compacted soil with relative density of 94% , maximum void ratio of 0.73, minimum void ratio of 0.4 and specific gravity (Gs) = 2.67. Two borrow pits are available as described in the following table. Choose the best borrow pit with minimum cost. Degree of saturation (%) 82 Borrow Pit Water content (%) Cost ($/m) A 18.43 10 В 100 24.34

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 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.
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CTTTT The soil in a borrow pit has a void ratio of 0.90. A fill of volume 20000 m³ has to be constructed with an in place dry density of 19.2 kN/m³. If the owner of borrow pit to be compensated at rate 2.5 per cubic metre of excavation, determine the cost of compensation. Take G = 2.68, Y = 9.81 kN/m³.
Box 2.12 Calculating settlement. Worked example A large landfill is planned on 10 m of normally consoli- midpoint can be taken as representative of the whole dated clays with an underlying rock stratum. The water table is at ground surface. Clay samples extracted from the stratum at an intermediate point at a depth of 5 m provide the following soil properties: saturated unit weight, Kat = 20 kN/m3, void ratio, e, = 0.8, and compression index, ç = 0.15. Determine the settlement of the clay layer if stratum: Final void ratio: a+ Aơ ep -e =c log 50+ 80 the increase in vertical stress due to the landfill load is = 0.8 -e =0.15 log- 50 = e- 0.74 Aơ = 80 kPa. Vertical unit strain: Solution: eo - er Ho 1+eo 0.8-0.74 The hypothesis of uniform loading over an infinite lateral extent, allows one-dimensional conditions to be assumed. The figure shows the effective stress distribution corre- sponding to the initial and final situations (unit weight of water is , = 10 kN/m³). Taking that the…
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ssion begins when the primary consolidation ends. B. The soil from a borrow area is excavated and used in a compacted fill for an embankment. The void ratio at the borrow area and the compacted fill are 0.96 and 0.62, respectively. What would be the volume of the excavation in the borrow area to construct 200,000 m3 of compacted fill? Q2:
Q2: For the soil profile and loading condition shown in Figure (2). Find: a) Final consolidation settlement. b) Time required for the settlement to be (42) mm. c) The settlement after 2 years. Surcharge Aq= 100 kPa 2 m Sand y= 19.5 kN/m 3 m Sand Ysat = 21 kN/ m Clay = 200 kN/m² C. = 0.2 C, = 3.4 m/yr Ysat = 19 kN/m 8 m e, = 0.85 C, = 0.04 Impervious layer Fig. 2