Question # 5 An existing crest vertical curve which connects +3% and -1% grades is designed for 55 MPH. The curve is to be re-constructed for a 65 MPH design speed. The PVI of the new curve will remain the same as the existing curve but the PVC and PVT will change to accommodate the new curve length. The existing curve's PVT is situated at station 40+00 and the elevation of the existing curve directly below the PVI is 179.22 ft. Stations increase from PVC to PVT. Determine: a. The stations of the new curve at PVC and PVT b. The elevations of the new curve at PVC and PVT c. Determine depth of excavation (d) at PVI station from existing to the new curve. PVC2 PVC₁ 91= +3% New Curve d 92= -1% Elevation 179.22 Station 40+00 PVT₁ PVT2

Question # 5 An existing crest vertical curve which connects +3% and -1% grades is designed for 55 MPH. The curve is to be re-constructed for a 65 MPH design speed. The PVI of the new curve will remain the same as the existing curve but the PVC and PVT will change to accommodate the new curve length. The existing curve's PVT is situated at station 40+00 and the elevation of the existing curve directly below the PVI is 179.22 ft. Stations increase from PVC to PVT. Determine: a. The stations of the new curve at PVC and PVT b. The elevations of the new curve at PVC and PVT c. Determine depth of excavation (d) at PVI station from existing to the new curve. PVC2 PVC₁ 91= +3% New Curve d 92= -1% Elevation 179.22 Station 40+00 PVT₁ PVT2

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Step 2: Determining length of new curve

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Step 3: Determining The stations of the new curve at PVC and PVT

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Step 4: Determining The elevations of the new curve at PVC and PVT

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Step 5: Determining The elevations of the new curve at PVC and PVT

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Step 6: Determining depth of excavation (d) at PVI station from existing to the new curve.

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