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A reinforced earth retaining wall is to be 30 ft high. Backfill: unit weight, 119 lb/ft°, for the soil friction angle, = 34°. Reinforcement: vertical spacing, Sy = 3 ft, horizontal spacing, S, = 4 ft, width of reinforcement = 4.75 in., f, = 38,000 lb/in², ø„ = 25°, factor of safety against tie pullout = 3, and factor of safety against tie breaking a. The required thickness of ties b. The required maximum length of ties %3D %3D 3. Determine: %3D

A reinforced earth retaining wall is to be 30 ft high. Backfill: unit weight, 119 lb/ft°, for the soil friction angle, = 34°. Reinforcement: vertical spacing, Sy = 3 ft, horizontal spacing, S, = 4 ft, width of reinforcement = 4.75 in., f, = 38,000 lb/in², ø„ = 25°, factor of safety against tie pullout = 3, and factor of safety against tie breaking a. The required thickness of ties b. The required maximum length of ties %3D %3D 3. Determine: %3D

Structural Analysis
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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## Problem 3 A reinforced earth retaining wall is to be 30 ft high. The backfill has a unit weight of 119 lb/ft³, and the soil friction angle is given as \( \phi = 34^\circ \). **Reinforcement Details:** - Vertical spacing, \( S_v = 3 \) ft - Horizontal spacing, \( S_H = 4 \) ft - Width of reinforcement = 4.75 in. - Tensile strength of reinforcement, \( f_v = 38,000 \) lb/in² - Coefficient of friction, \( \phi_\mu = 25^\circ \) - Factor of safety against tie pullout = 3 - Factor of safety against tie breaking = 3 **Determine:** a. The required thickness of ties b. The required maximum length of ties --- ## Problem 4 Assume in Problem 3 that the ties at all depths have a length of 45 ft. If the soil friction angle is 25 degrees and the unit weight is 116 lb/ft³ (for all soils other than the backfill soils), calculate the factor of safety against: (a) Overturning (b) Sliding
Transcribed Image Text:## Problem 3 A reinforced earth retaining wall is to be 30 ft high. The backfill has a unit weight of 119 lb/ft³, and the soil friction angle is given as \( \phi = 34^\circ \). **Reinforcement Details:** - Vertical spacing, \( S_v = 3 \) ft - Horizontal spacing, \( S_H = 4 \) ft - Width of reinforcement = 4.75 in. - Tensile strength of reinforcement, \( f_v = 38,000 \) lb/in² - Coefficient of friction, \( \phi_\mu = 25^\circ \) - Factor of safety against tie pullout = 3 - Factor of safety against tie breaking = 3 **Determine:** a. The required thickness of ties b. The required maximum length of ties --- ## Problem 4 Assume in Problem 3 that the ties at all depths have a length of 45 ft. If the soil friction angle is 25 degrees and the unit weight is 116 lb/ft³ (for all soils other than the backfill soils), calculate the factor of safety against: (a) Overturning (b) Sliding
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