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:

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:

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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Concept explainers

Calculation of Settlement

The vertical displacement of the structural foundation due to the loading from the superstructure is known as settlement. It is due to the reduction of air voids present in the soil. The amount of vertical displacement depends on the bearing capacity of the soil on which the foundation is laid. The effect of the settlement depends on the magnitude of settlement, uniformity, and the structural design of the structure. The maximum allowable settlement for residential and office buildings should be less than 18 mm, for industrial buildings, it is 38 mm and for commercial buildings, it is 25 mm.

Question

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:

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A soil deposit to be used for construction of an earth embankment has an average dry density of 1620 kg/m³. If the compacted embankment is to have an average dry density of 1720 kg/m³ determine the volume of soil to be excavated for 1000 cu.m. of embankment. The water content of the soil in the borrow pit is 10%.
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?
Refer to Figure 7.28. For the construction of an airport, a large fill operationis required. For the work, the average permanent load, (p), on the claylayer will increase by about 70 kN/m2. The average effective overburdenpressure on the clay layer before the fill operation is 95 kN/m2. For the claylayer, which is normally consolidated and drained at top and bottom, H = 5 m, Cc = 0.24, e0 = 0.81, and cv = 0.44 m2/mo.a. Determine the primary consolidation settlement of the clay layer causedby the additional permanent load, (p).b. What is the time required for 90% of primary consolidation settlementunder the additional permanent load only?c. What temporary surcharge, (f), will be required to eliminate the entireprimary consolidation settlement in 6 months by the precompressiontechnique?
1. Specifications on a job require a fill using borrow soil to be compacted to 95% of its standard Proctor maximum dry density. Tests indicate that this maximum is 124 lb/ft³ when dry. The soil now has 12% moisture. The borrow material has a void ratio of 0.6 and a solid specific gravity of 2.65. What is the minimum volume of borrow soil required per 1.0 ft³ of fill volume? Equations: P₁ W = M M = M₁ V₁ ; Pa M S V₁ ;Ps = M. -; Pw = V ·;e= ; n = Vw V, V₁ M. W V. V x100%; G = -; Constants: pw = 1000 kg/m³; yw-62.4 pcf Pw : S = V. W V₁₂ -×100%;
surcharge of 1000 lb/ft?? Assume C, = 1/6 C. 8.6 A soil profile is shown in Figure 8.23. The preconsolidation pressure is 3400 lb/ft?. Estimate the primary consolidation settlement that will take place as a result of a surcharge Ao = 1500 lb/ft. Assume C, = 1/5 C. %3D %3D Aa Dry sand 90=2 G, = 2.65 10 ft Groundwater table Sand 10 ft- G, = 265 Clay 10 ft W= 30% G,= 2.7 Liquid limit=35 Rock Figure 8.23 aning. All Rights Reserved. May not he copied, scanned or duplicated in whole or in Due to olectrIGK nhu scme third parry COnent may be suppressed inm the eBook andoreChupters
Problem 2: The above borrow pit soil has a natural bulk unit weight of 17.5 kN/m² and water content of 8.5%. An embankment is to be constructed using this soil and the specification require the fill to be compacted to 96% of the above proctor compaction. Determine the cost for 50,000 m³ of the embankment considering the following: a) The distance between the borrow pit and the embankment is 55 km b) The cost of transporting 1 m³ of the borrow pit soil to the site is 16 OMR/km. c) The cost of compaction is 8 OMR/m³.
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4) In the borehole B-11, a buried clay layer of 30 feet thick is sandwiched between strata of free- draining granular soil so that double drainage during consolidation can occur. Calculations indicate that, due to a planned building loading, an ultimate settlement of 2 in. is expected as a result of consolidation of the clay layer. The coefficient of consolidation for the clay is 0.01 ft2/day. a) How long will it take 90 percent of the estimated settlement to take place? b) How much settlement will occur in one year? c) How long will it take for one inch of the settlement to take place?
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A fill having a volume of 15000 m³ is to be constructed at a void ratio of 0.5. The borrow pit solid has a void ratio of 1.5. The volume of soil required (in cubic meters) to be excavated from the borrow pit will be: