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Cross_Section_Lab_Manual

# Cross_Section_Lab_Manual - AUTOCAD ASSIGNMENT#3 CROSS...

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AUTOCAD ASSIGNMENT #3 - CROSS SECTIONS AND EARTHWORK The purpose of this assignment is to create two cross-sections for the 2-lane highway from Assignments #1 and #2 using AutoCAD and calculate the volume of cut and fill required between the two stations. You will use the same AutoCAD commands as were used in the vertical profile assignment, but applied to the cross-section. In the third of three AutoCAD exercises we will develop two sample cross sections; one cut and one fill condition. A field survey and preliminary design work provided the information in Table 3. TABLE 3 Cross Section Information Station 21+50 33+50 Existing Ground Centerline 724’ 785’ Existing Ground Cross Slope 1.5% 2.0% Finished Grade Centerline 719’ 791’ Travel Lanes 11’ sloped at 2% Shoulders 6’ sloped at 4% Clear Zone (beyond shoulders) 10’ sloped at 6% Fore Slopes and Back Slopes sloped 2:1 (x:y) to the bottom of ditch Ditch 2’ wide at bottom and minimum of 4’ deep PROCEDURE: 1. Draw a grid composed of 10’ x 10’ squares (160’ wide by 110’ high).

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