In Idaho Spring, Colorado, an existing tunnel on I-70 (Veterans Memorial Tunnel, Figure 1) is to be connected to a proposed bridge with sag and crest vertical curves. The profile view of the tunnel and bridge is shown in Figure 2. Design a vertical alignment that is to include both a sag curve (equal tangent) and a crest curve (equal tangent) that will connect the tunnel and bridge by determining the highest possible common design speed. Compute the stationing and elevations of PVC, PVI, and PVT for both the sag and crest curve.
In Idaho Spring, Colorado, an existing tunnel on I-70 (Veterans Memorial Tunnel, Figure 1) is to be connected to a proposed bridge with sag and crest vertical curves. The profile view of the tunnel and bridge is shown in Figure 2. Design a vertical alignment that is to include both a sag curve (equal tangent) and a crest curve (equal tangent) that will connect the tunnel and bridge by determining the highest possible common design speed. Compute the stationing and elevations of PVC, PVI, and PVT for both the sag and crest curve.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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In Idaho Spring, Colorado, an existing tunnel on I-70 (Veterans Memorial Tunnel, Figure 1) is to be connected to a proposed bridge with sag and crest vertical curves. The profile view of the tunnel and bridge is shown in Figure 2. Design a vertical alignment that is to include both a sag curve (equal tangent) and a crest curve (equal tangent) that will connect the tunnel and bridge by determining the highest possible common design speed. Compute the stationing and elevations of PVC, PVI, and PVT for both the sag and crest curve.
Transcribed Image Text:Tunnel Floor
elevation = 1500 ft.
Bridge deck
Crest vertical curve elevation = 1540 ft.
Sag vertical curve
Station 24 +00
Station 12 +00
Figure 2 Profile view of required vertical alignment.
Figure 1 Veterans Memorial Tunnel, 170 in
Idaho Springs Colorado.
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