Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Question
Chapter 3, Problem 19P
To determine
Whether the designed location is hazardous or not. And action recommended for hazardous location.
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Refer to the following figures:
6 m
0.25 H
0.75 H
3 m
2 m
1 m
A
с.ф.у
1 m
B
Figure Peck's (1969)
apparent-pressure envelope for
cuts in soft to medium clay
Given: y = 18.4 kN/m³, c = 30 kN/m², p = 0, and center-to-center spacing of struts in the plan = 5 m. Determine
the strut loads at levels A, B, and C.
(Enter your answers to three significant figures.)
PA=
kN
PB =
kN
Pc=
kN
Refer to the following figure:
6 m
3 m
2 m
1 m
A
c,φ,γ
1 m
B
Given: y = 17.9 kN/m³, c = 60 kN/m², 6 = 0, and center-to-center spacing of struts in the plan = 5 m. The length
of the cut is 12.5 m. Determine the factor of safety against bottom heave for the braced cut. Use the equation
CNC (1+0.25)
FS =
զ
с
x +
H
B'
:) H
(Enter your answer to three significant figures.)
FS
=
Given Data
Initial Road Design:
• Design speed: 85 km/h
•
•
Radius of both circular arcs: R
= 845 m
=
0.44 m/s³
= 250 m
•
Rate of gain of radial acceleration on all transitions: q
Length of straight section between the curves: Lstr
Redesigned Road:
New design speed: 120 km/h
• New radius: R'
= 2500 m
Chapter 3 Solutions
Traffic and Highway Engineering
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