Principles of Foundation Engineering (MindTap Course List)
9th Edition
ISBN: 9781337705028
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Chapter 9, Problem 9.5P
To determine
Find the expected settlement beneath the center of the foundation.
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If a soil has a Swell Factor of 1.5, then 10 m3 of banked soil when excavated will have 15 m3 in the loose state.a) TRUEb) FALSE
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Principles of Foundation Engineering (MindTap Course List)
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- The normally consolidated clay soil will be supported by a retaining wall in active conditions. Laboratory testing of this soil revealed the following shear strength: Su = 40 kPa and c'=0, o' (friction angle )= 26° (all derived from undrained TX tests). Assume a vertical wall, no interface friction angle and GWT at the ground surface (right side only). a. Determine the total lateral earth pressure distribution for short term design (immediately after construction). b. Determine the total lateral earth pressure distribution for long term design (drained conditions). C. Discuss the magnitude differences between the two and which earth pressure provides the greatest load case for the wall, i.e., controls the wall design.arrow_forward. A triangular fill with dimensions as shown below is piled on the slope. The shear strength parameters of the plane between the fill material and the slope were determined as 12 kPa and 25°. Since the unit weight of the fill is 18.5 kN/m3, calculate the factor of safety against sliding.arrow_forwardi).Explain the critical height in Clay (Cohesive soils)? Give equations for earth pressure for active and passive conditions for soils with c > 0 and ф > 0 i.e Cohesive soils. (ii)Explain is it good or bad to backfill retaining wall with Clay soil Vs Sandy Soil. Support your answer with valid arguments.arrow_forward
- 1. Side slopes for rock fill 1V:2H. Calculate the minimum crest width of a breakwater using B = 3*kΔ*(W/γa)1/3 . Given data: Stone weight = (8) t, Specific weight = 2,7 t/m3, Layer thickness coefficient =1,00 and Porosity percentage = 37 2. For cubed shaped stone (or concrete), determine dimension of the stone for weight: W = (10+a) t, specific weight: γa = 2,4 t/m3arrow_forwardWater is flowing vertically upward in a sand with a saturated unit weight of 20 kN/m3. At what gradient will quick conditions occur?arrow_forwardDetermine the Max net soil pressurearrow_forward
- 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.arrow_forwardA cut is made into a homogeneous soil as depicted in the figure below, at an angle of 60° with the horizontal. Calculate the resisting shear force in kN along the failure plane given that the shear force applied by the overlying soil wedge is 120 kN. The failure plane is at an angle of 40° from the horizontal direction and the ground water level is below this plane. Assume drained conditions for this question.arrow_forwardAssuming a smooth retaining wall shown below, what is the most likely lateral earth pressure condition that applies to soils A and B, respectively? Soil A: Active, Soil B: Passive Soil A: Passive, Soil B: Active Soil A: Active, Soil B: Active Soil A: Passive, Soil B: Passivearrow_forward
- 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.arrow_forwardA trapezoidal embankment for a highway of 30m wide at the top,1.5m in compacted thickness with a side slope of 1:3 is to be constructed from a silty sandy GRAVEL trucked from a borrow pit. The water content in the borrow pit is 15% and its void ratio is 0.69. Truck of 15m3 capacity will be used to carry the soil from the borrow pit at the void ratio of 0.80 and at the same moisture content as the borrow pit materials. The specification requires the embankment to be compacted at a dry unit weight of 18kN/m3. Specific gravity of the soil is 2.7 and unit weight of water is 9.8kN/m3. Determine, for 500m length of embankment, the number of trips of each truck assuming 20 trucks are allocated for this activity.arrow_forwardconcept of slope stability in fine soil the factor that affect the stability and the causes of failuararrow_forward
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