Question
Download Solution PDFIf an upgrade of 2% is followed by a downgrade of 2%, and the rate of change of grade is 0.4% per 100 m, the length of the vertical curve will be:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Total Grade = Grade 1 – Grade 2
Length of curve = (Total grade/Rate of change of grade per chain length) × Length of chain
Calculation:
An upgrade of + 2% joins another upgrade of - 2%.
Grade = + 2 – (- 2) = 4 % (Upward)
The change of grade is 0.4% per 100 m chain.
L = (4/0.4) × 100 = 1000 mLast updated on May 28, 2025
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