Traffic And Highway Engineering
5th Edition
ISBN: 9781133605157
Author: Garber, Nicholas J., Hoel, Lester A.
Publisher: Cengage Learning,
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Chapter 16, Problem 21P
To determine
The ground water infiltration ratefor a new two-lane pavementfor the given characteristics.
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26. Refer to Figure 8 Design 1A attached. For the design of a 4-lane interstate highway, the damage analysis
shown in the figure was performed for a 9.5-inch thick slab according to the PCA design approach. This
analysis indicates that the 9.5-inch thick slab:
a. Only satisfies the fatigue damage condition
b. Only satisfies the erosion damage condition
c. Satisfies both fatigue damage and erosion damage conditions.
d. None of the above
the
13. Refer to Figure 3.1 attached. In the flexible pavement design example illustrated in the figure, what would be the required structural number if designing for W18=2,000,000 instead?a. 1.5b. 4.3c. 6.1d. 7.3
Example 7. What is the spacing between contraction
joints for 4.0 m slab width having thickness of 20 cm
and f = 1.5 for the RCC pavement having 1.0 cm bar
dia at 0.30 in spacing? (take ost = 1400 kg/cm² and
Yc = 2400 kg/m²)
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- Please solve the below question and give the solution in m3/day/m2 only not in feets. please solve it as early as possible. Determine the ground water infiltration rate for a new four-lane pavement with the following characteristics: Lane width = 3.6m Shoulder width = 3m Length of contributing transverse cracks (Wc) = 12m Rate of infiltration (Kp) = 0.015 m3/day/m2 Spacing of transverse cracks = 12marrow_forwardQuestion 1:- Design the overlay with the help of following data: (i) Mean 1.0 mm, standard deviation = 0.25 mm (ii) Temperature at the time of measurement=38°C (iii) soil type= clay (iv) Design traffic at the end of 10 years is 1000 cvpd (v) Coverage of the deflection values on pavement = 98% Question 2:- Determine the thickness of rigid overlay for a 10 cm thick slab in good condition. The design thickness required, due to increased ased loading, is 20 cm Created with Mi Notesarrow_forwardPavement Design and Analysis - Design a HMA pavement structure for a 6-lane divided urban highway using the AASHTO method to accommodate the traffic loads and conditions as follows. Give two alternative layer thickness combinations.arrow_forward
- Q6: Designing a Rigid Pavement Using the AASHTO Method (Find D) Effective modulus of subgrade reaction, k = 480 lb/in³ Mean concrete modulus of rupture, Sc = 725 lb/in² Load transfer coefficient, J = 3.9 Ec = 4500000 Drainage coefficient, Ca = 1.0 Design serviceability loss, APSI = 1.5 ZR (Standard normal deviation) = -1.282 Overall standard deviation, So = 0.4 Cumulative 18 kip ESAL = (37900000)arrow_forwardB. A rigid pavement with a 10-inch slab thickness, 90 percent reliability, E. = 4 million lb/in², 600 lb/in² modulus of rupture, 150 lb/in³ modulus of subgrade reaction, a 2.8 load transfer coefficient, initial PSI of 4.8, final PSI of 2.5, overall standard deviation of 0.35, and a drainage coefficient of 0.8 is designed. The pavement's design life is 20 years. The three-lane road is built for vehicles with one 20,000-pound single axle, one 26,000-pound tandem axle, and one 34,000-pound triple axle. Calculate the projected daily truck traffic on the three lanes.arrow_forwardA homogeneous half-space pavement is loaded by a set of dual tires that carries a total load of 60,000 lb with a tire pressure of 150 p inches. Determine the ESWL for a based on equal contact radius. The clearance between the dual tires is 8 Soci avement of 20 inch in thickness using Huang's chartarrow_forward
- 12.7 Figure P12.7 shows a concrete pavement with the thicknesses and elastic moduli as indi- cated. Assume a modulus of rupture of 650 psi, a load transfer coefficient of 3.2, a service- ability loss from 4.5 to 2.0, and poor drainage with 5% of time near saturation. Determine the performance traffic by Eq. 12.21 without the reliability term and check the result by the AASHTO design chart. [Answer: 8.5 × 106] Portland Cement Concrete E = 4 x 106 psi Granular Subbase ESB = 30,000 psi Subgrade MR = 5000 psi 8 in. 8 in. FIGURE P12.7arrow_forwardA flexible pavement is designed to last 10 years to withstand truck traffic that consists only of trucks with two 18-kip single axles. The pavement is designed for a soil CBR of 10, an initial PSI of 5.0, a TSI of 2.5, an overall standard deviation of 0.40 and a reliability of 90%, and the structural number was determined to be 6. Determine the number of daily trucks traveling in the peak direction. 150,814 B 75,407 C) 37,704 18,852arrow_forwardB. A rigid pavement with a 10-inch slab thickness, 90 percent reliability, E. = 4 million Ib/in?, 600 lb/in? modulus of rupture, 150 lb/in³ modulus of subgrade reaction, a 2.8 load transfer coefficient, initial PSI of 4.8, final PSI of 2.5, overall standard deviation of 0.35, and a drainage coefficient of 0.8 is designed. The pavement's design life is 20 years. The three-lane road is built for vehicles with one 20,000-pound single axle, one 26,000-pound tandem axle, and one 34,000-pound triple axle. Calculate the projected daily truck traffic on the three lanesarrow_forward
- 07. Determine Structural Number and terminal serviceability index value of flexible pavement. Given B and G, value for 32-kip tandem-axle loads. B= 0,4 G= -0.22arrow_forwardDetermine the groundwater infiltration rate for a new four-lane pavement with the following characteristics: Lane width = 3.6 m Shoulder width = 3 m Length of contributing transverse cracks (W) = 12 m Rate of infiltration (K) = 0.015 m³/day/m² Spacing of transverse cracks = 12 marrow_forwardCalculate the following values using the one-layer equation Delta_{x} = (p(1 + mu) * a)/E_{1} * [z/a * A + (1 - mu) * H] for the flexible pavement conditions indicated in Figure a. A at point m b. σ, and e, at point o c. 1,2,3 and Tax at point p Since the surface deflection is required, for the one-layer assumptions noted, A= A, (since-A,, = 0).arrow_forward
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