Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN: 9781305970939
Author: Braja M. Das, Khaled Sobhan
Publisher: Cengage Learning
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Chapter 7, Problem 7.14P
To determine
Find the hydraulic conductivity of the sand at relative density of 50 %.
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4- As part of a highway interchange project, a ramp will be constructed to allow the vehicles
exit the first highway and enter the second highway. The first highway runs north-south and
the second one had a right angle to the first one (it runs east-west). Vehicles going to the
north can use this exit ramp to enter the second highway as shown in the plan view in the
figure below. The design speed in both highways is 100 km/hr. The stationing of the start of
the horizontal curve is 40+00.
a) Determine the stationing of PI and PT¶
b) The first highway has a vertical grade of +3.5% and the second highway has a grade of -
0.5%. The stationing of the beginning and the end of the crest curve are the same as the
horizontal curve. What is the elevation of the end of the vertical curve (PVT) if the
elevation of the start point (PVC) is 1500m
c) Calculate K for the vertical curve
Plan view (horizontal alignment)
PT
1
N
Profile view (vertical alignment)
G1=0.5%
PVT
PC, 40+00
PVC
G1=+3.5%
10- A pavement with a thin bituminous surface is going to be constructed with a design traffic of
6*105 ESA. Laboratory testing of the subgrade and pavement materials has given the
following CBR values. Design the pavement using the empirical design method. Use the
and show how you got the numbers on the graph
relevant graph}
Subgrade CBR: 5
Granular subbase material:
Upper layer CBR> 30
Lower layer CBR = 10
Granular base material CBR >100
1- Describe the perception-reaction process in driver's decision making. What are the steps this
process consists of and what tasks are included in each step? Why this process should be
considered in transportation planning
3- What are the three main parts that can be included in a road cross section? Briefly describe
what each part is for? Sketch a typical cross section
Chapter 7 Solutions
Principles of Geotechnical Engineering (MindTap Course List)
Ch. 7 - Prob. 7.1PCh. 7 - Prob. 7.2PCh. 7 - Prob. 7.3PCh. 7 - Prob. 7.4PCh. 7 - Prob. 7.5PCh. 7 - Prob. 7.6PCh. 7 - Prob. 7.7PCh. 7 - Prob. 7.8PCh. 7 - Prob. 7.9PCh. 7 - Prob. 7.10P
Ch. 7 - Prob. 7.11PCh. 7 - Prob. 7.12PCh. 7 - Prob. 7.13PCh. 7 - Prob. 7.14PCh. 7 - Prob. 7.15PCh. 7 - Prob. 7.16PCh. 7 - Prob. 7.17PCh. 7 - Prob. 7.18PCh. 7 - Prob. 7.19PCh. 7 - Prob. 7.20PCh. 7 - Prob. 7.21PCh. 7 - Refer to Figure 7.24. The following data were...Ch. 7 - Prob. 7.23PCh. 7 - Prob. 7.1CTP
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