Part 3: Problem-Solving. Solve the following problems. Show all calculations.1. A retaining wall 5.80m high supports soil that has the following properties:Unit weight = 17.3 kN/m³Angle of internal friction = 26 deg.Cohesion = 14.5 kPaa) Calculate the normal pressure acting at the back of the wall assuming no tensile crackoccurs in the soil.b) Find the location of the tensile crack measured from the surface of horizontal backfill.c) Determine the active pressure acting on the wall in tensile crack occurs in the soil.2. The soil material is supported by a retaining wall to a height of 6m. The unit weight of the soil is16 kN/m³ and the angle of internal friction is 29 deg. Assume the soil is cohesionless.a) Determine the earth pressure on the wall.b) Find the total active pressure if surcharge of 14 kPa is applied on the surface ofhorizontal backfill.c) Locate the position of the total pressure from the bottom.

Answered: Part 3: Problem-Solving. Solve the…

Principles of Foundation Engineering (MindTap Course List)

8th Edition

ISBN:9781305081550

Author:Braja M. Das

Publisher:Braja M. Das

Chapter12: Lateral Earth Pressure

Section: Chapter Questions

Problem 12.13P

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Consider the following figure: H/3 Pa Given: H = 7 m, y = 13 kN/m³, ø′ = 25°, c′ = 12 kN/m², and a = 10°. For given values, K₁ = 0.296. Calculate the Rankine active force per unit length of the wall after the occurrence of the tensile crack. (Enter your answer to three significant figures.) Pa = kN/m
A square flexible foundation of width B applies a uniform pressure go to the underlying ground. (a) Determine the vertical stress increase at a depth of 0.5B below the center using Aσ beneath the corner of a uniform rectangular load given by Aσ Variation of Influence Value I m n 0.5 0.6 0.8 1.0 0.2 0.4 0.2 0.01790 0.03280 0.03866 0.04348 0.05042 0.05471 0.4 0.03280 0.06024 0.07111 0.08009 0.09314 0.10129 0.5 0.03866 0.07111 0.08403 0.09473 0.11035 0.12018 0.6 0.04348 0.08009 0.09473 0.10688 0.12474 0.13605 0.8 0.05042 0.09314 0.11035 0.12474 0.14607 0.15978 1.0 0.05471 0.10129 0.12018 0.13605 0.15978 0.17522 (Enter your answer to three significant figures.) Ασ/90 = Activity Frame (b) Determine the vertical stress increase at a depth of 0.5B below the center using the 2 : 1 method equation below. 90 x B x L Aσ = (B+ z) (L+ z) (Enter your answer to three significant figures.) Δσ/90 = (c) Determine the vertical stress increase at a depth of 0.5B below the center using stress isobars in…
= A 5 m high smooth vertical wall retains a clay backfill with c = 13 kN/m², ' -25°, and y = 17.0 kN/m³. The clay is in active state. a. Determine the maximum tensile stress within the clay. (Enter your answer to three significant figures.) σα = kN/m² b. Determine the depth of the tensile cracks. (Enter your answer to three significant figures.) Zo = m c. Determine the magnitude and location of the active thrust, neglecting the tensile zone. (Enter your answers to three significant figures.) Pa x = = kN/m² m
Use Eq. (6.14) to determine the stress increase () at z = 10 ft below the center of the area described in Problem 6.5. 6.5 Refer to Figure 6.6, which shows a flexible rectangular area. Given: B1 = 4 ft, B2 = 6 ft, L1, = 8 ft, and L2 = 10 ft. If the area is subjected to a uniform load of 3000 lb/ft2, determine the stress increase at a depth of 10 ft located immediately below point O. Figure 6.6 Stress below any point of a loaded flexible rectangular area
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EB and FG are two planes inside a soil element ABCD as shown in Figure 10.50. Stress conditions on the two planes are Plane EB: EB = 25 kN/m2; EB = +10 kN/m2 Plane FG: FG = 10 kN/m2; FG = 5 kN/m2 (Note: Mohrs circle sign conventions for stresses are used above) Given ; = 25, determine: a. The maximum and minimum principal stresses b. The angle between the planes EB and FG c. The external stresses on planes AB and BC that would cause the above internal stresses on planes EB and FG
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