Answer to Question #105128 in Civil and Environmental Engineering for Maynard Costa

Question

In a certain road construction, a forward tangent of 3% is to connect a back tangent of 5% by a 200 m symmetrical parabolic curve. It was found however that the grade intersection at Sta. 10+100 w/ elev. 100 m, fall on a rocky section w/ the exposed boulder at elev. 102.67 m. To avoid rock excavation, it was decided to adjust the curve in such a way that the curve will just clear the rock w/o altering the portion of PC and grade of the tangent. Determine the station and elevation of the new PT.

Answer 1

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