Question

A proposed reconstruction of a thickness and chara existing pavement consists Florida State Rcad is being planned. The current pavenmenst acteristics of the foundation layers are shown in the attached boring log The o sphalt layer, a sandy-limerock hase, and a sandy subhase. The r f an a seds of organic scils and peat. This pavement was constructed many years ago on pure experience. MODULE I: AASHTO APPROACH New information is now available on traffic and material propertics. Based on that, check the adequacy of the existing design, using the AASHTO (1993) approach. To do that, re-design the thicknesses of a new 2-lane fn the existing materials, and compare with the existing layer thicknesses Following information is available Trafic The average daily truck traffic is 5000 along the 2-lane highway. Assume a 5% growth rate for the traffic. Traffic counts are given in terms of number of axles per 100 trucks as follows " of Single axles/100 Tandem load (kips) trucks axles/100 trucks 75. 29.9 4.2 12 14 0.5 18 20 2.0 3.6 4.2 Subgrade: Seasonal data shows that the resilient moduli of the subgrade soils from January through December are: 20000, 20000, 6000, 6000, 6000, 9000, 9000, 9000, 9500, 9500, 8000, and 20000 psi Base and Subbase: Assume properties based on the material type. Deliverable: Prepare Table I comparing the old layer thicknesses with the newly designed thicknesses, and make concluding remarks

this is the first part.

Answer 1

可mo dong the 2-Anne ty.ghany'rsuming