The centerline of a new railway line is to be set out along a valley. The first straight AI bears 75°, while the connecting straight IB bears 120°; due to site condition, it has been decided to join the straights compound curve. The first curve of the radius is 500 m commenced at T1, situated 300 m from I on straight AI, and deflects through an angle of 25°before joining 2nd curve has deflected an angle of 20°. Calculate the radius of the 2nd curve and distance of tangent point T2 from I on the straight IB. Hint A= 45°. Figure (1) illustrates the layout of the curve.
The centerline of a new railway line is to be set out along a valley. The first straight AI bears 75°, while the connecting straight IB bears 120°; due to site condition, it has been decided to join the straights compound curve. The first curve of the radius is 500 m commenced at T1, situated 300 m from I on straight AI, and deflects through an angle of 25°before joining 2nd curve has deflected an angle of 20°. Calculate the radius of the 2nd curve and distance of tangent point T2 from I on the straight IB. Hint A= 45°. Figure (1) illustrates the layout of the curve.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:The centerline of a new railway line is to be set out along a valley. The first
straight AI bears 75°, while the connecting straight IB bears 120°; due to site
condition, it has been decided to join the straights compound curve.
The first curve of the radius is 500 m commenced at T1, situated 300 m from I on
straight AI, and deflects through an angle of 25°before joining 2nd curve has deflected
an angle of 20°. Calculate the radius of the 2nd curve and distance of tangent point T2
from I on the straight IB. Hint A= 45°. Figure (1) illustrates the layout of the curve.
14/2
A/2
T
T2
R
Figure (1) layout of the curve
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