Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Question
Chapter 16, Problem 22P
To determine
The ground water infiltration ratefor a new four lane pavement for the given characteristics.
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Determine the ground water infiltration rate, ft3/d/ft2, for a new two-lane pavement with the following characteristics: 12-ft lane width, 10-ft shoulder width, 20-ft length of contributing transverse cracks, a rate of infiltration of 0.05 ft3/d/ft2, and a spacing of transverse cracks of 30 ft. Assume a standard crack infiltration rate of 2.4 ft3/d/ft.
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
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
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Traffic and Highway Engineering
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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_forwardA pavement of 30 cm. thickness and modulus of elasticity of 3500 kg/cm?. This layer is laid over a subgrade with a modulus of elasticity of 700 kg/cm2. Find the surface deflection under the center of a tire with a tire pressure of 6.0 kg/cm? and a circular contact area of 707 cm?.arrow_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_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 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_forward
- A 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_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_forward07. 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_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_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_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_forward
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