MANUAL_Assignment_1

MANUAL_Assignment_1 - CE 321 Highway Engineering Laboratory...

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CE 321 – Highway Engineering Laboratory Manual for use with AUTOCAD 2008 and Land Desktop 2008 By R.J. Porter and Frank Gross Lab revised for AUTOCAD 2008 by Scott Himes (based on an earlier version by Karl Raynar and Brian St. John) Copyrighted 2005. No copying or other reproduction without prior written permission of the authors. All rights reserved. AUTOCAD ASSIGNMENT 1 - HORIZONTAL ALIGNMENT 1
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This is the first of three AutoCAD exercises where we will develop a preliminary design (i.e. plan, profile, and cross section) for a new road connecting from Southwest Road to North Road as shown on the attached map. Alternate B is a 2-lane highway with 11-foot lanes and 6-foot shoulders. Preliminary estimates indicate that 120-feet of right-of-way is needed for the project. In this exercise, we will develop a horizontal alignment for alternate B. A field survey and preliminary design work provided the following information: Beginning station: 10+00 Curve #1 data PI: 39+75.72 Deflection angle: 87.42° (Curve to the left) Radius: 1315’ Curve #2 data PI: 74+95.85 Deflection angle: 50.1249° (Curve to the right) Radius: 980’ Ending station: 84+10.14 (surveying) or 78+43.15 (along centerline) depending on how stations are measured (along alignment or along tangents). The submitted AutoCAD drawing should clearly show the centerline, edges of pavement, and limits of right of way . Label all relevant information: stationing, PC, PT, PI, BS, ES, curve data (i.e. R, L, and delta), x1, x2, x3, and bearings with appropriate measurements and units. Be sure to include a scale and north arrow. Plot the drawing on 11”x17” paper. Hand Calculations: BS, PI, PC, PT, T, L (for both curves) and ES (all calculations should be based on measurements along the centerline). Equations for Assignment #1 Relevant Curve Equations T = R tan (Δ/2) L = R * Δ, where Δ is in radians Station Equations PC A = PI A - T A PT A = PC A + L A For subsequent curves: PI B = PT A + x 2 - T A PC B = PI B - T B PT B = PC B + L B 2
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Figure 1 Alternate B connecting Southwest Road to North Road 3
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Create Folder in P:\ named CE321 Start AutoCAD 2008 Set Drawing Units ≡Format ≡Units Units = Decimal Precision = 0.00 Angles = Surveyor measured Counter-clockwise Direction East Precision = N 0d 00’ 00” E Scale blocks to inches Set Layer and Line types ≡Format ≡Layer… Layer dialogue box Create 4 new layers named ROW, Centerline, Shoulder, and EOP Click on Line type tab Click load and then highlight and select all line types and click OK Click on LAYER tab Make line type for ROW dashed Make line type for Centerline
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