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MindTap Engineering for Garber/Hoel's Traffic and Highway Engineering, 5th Edition, [Instant Access], 1 term (6 months)
5th Edition
ISBN: 9781305581159
Author: Nicholas J. Garber; Lester A. Hoel
Publisher: Cengage Learning US
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Question
Chapter 5, Problem 19P
To determine
(a)
The appropriate countermeasures while establishing crash reduction factors.
To determine
(b)
The expected reduction in crashes per year after implementation of the countermeasures.
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Students have asked these similar questions
=
A steel pile (H-section; HP 310 x 125; and so A, 15.9 x 10-3 m² ) is driven into a layer of sandstone. The length of the pile is 25 m. Following are the properties of the sandstone: unconfined compression
strength = qu(lab) = 78 MN/m² and angle of friction = 36°. Using a factor of safety of 3, estimate the allowable point load that can be carried by the pile. Use [qu(d Qu(lab).
qu(design)
b)/5].
(Enter your answer to three significant figures.)
Qp(all)
kN
Си
A concrete pile 20 m long having a cross section of 0.25 m x 0.25 m is fully embedded in a saturated clay layer. For the clay, given: Ysat = 18 kN/m³, = 0, and c₁ = 80 kN/m². Determine the allowable load that
the pile can carry (FS-3). Use the A method to estimate the skin resistance. For L = 20 m, A = 0.173.
(Enter your answer to three significant figures.)
Qall
kN
A concrete pile 65 ft long having a cross section of 15 in. × 15 in. is fully embedded in a saturated clay layer for which Ysat =
can carry. (Let FS = 3.)
Use the a method equation
QsfpAL =
ac₂pAL
and the following table to estimate the skin friction and Vesic's method for point load estimation.
Си
α
Pa
≤ 0.1
1.00
0.2
0.3
0.92
0.82
0.4
0.74
0.6
0.62
0.8
0.54
1.0 0.48
1.2
0.42
1.4 0.40
1.6
0.38
1.8 0.36
2.0 0.35
2.4 0.34
2.8 0.34
Note: atmospheric pressure pa ≈ 100 kN/m² or 2000 lb/ft².
(Enter your answer to three significant figures.)
Qall =
kip
121 lb/ft³, = 0, and Cu
=
1600 lb/ft². Determine the allowable load that the pile
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