Answered: 13.2 K b'* a' > qlunit area A C \45 +…

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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Question

A reinforced earth retaining wall (Figure 13.27) is to be 10-m-high. Here,
Backfill: unit weight, γ₁ = 16 kN/m³ and soil friction angle, Φ'₁ = 34º
Reinforcement: vertical spacing, S_V = 1 m; horizontal spacing, S_H = 1.25 m;
width of reinforcement = 120 mm., f_y = 260 MN/m²; Φ_μ = 25º;
factor of safety against tie pullout = 3; and factor of safety
against tie breaking = 3
Determine:
a. The required thickness of ties
b. The required maximum length of ties

13.2
K b'* a' >
qlunit area
A
C \45 + øj/2
Sy
Sand
Sy
YI
- Sy
H
(a)
Sy
Sy
z = NSy
Sy
B
In situ soil
(b)
+)
o'a2)
Figure 13.27 Analysis of a reinforced-earth retaining wall

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