Infrastructure $22023$

Assignment $3$: Cross Section Calculations

Given:

A set of existing ground data for Station $20+40$ along a stretch of roadway

Design data for the road alignment section including this station

Procedure:

Calculate offsets and elevations for all critical points the following surfaces: Original Existing Ground Surface

Stripped Ground Surface

Top Design Surface

Neutral points at intersection of design sideslopes and stripped ground surface

Top of Asphalt

Top of Concrete

Top of A base

Top of $C$ base

Bottom of $C$ base $/$ Top of subbase

for section $20+40.$ Show all design elevations and offsets to three decimal places.

Summarize your elevations and offsets by drawing a labeling two schematic views of the design cross section. Note these are NOT plotted completely to scale. They DO however need to be representative. There are a lot of numbers and labels to put on these, so draw it them on full separate pages. Show every elevation$/$offset from part $1$ and label each material.

View $1$: show the top design surface, original existing ground surface and stripped surface. Label elev$/$offset for all points. Use a different linetype for each of the three surfaces and identify each one.

View $2$: show the embankment in detail, with the top surface and all material layers. Label elev$/$offset for all points and identify each material layer. If the stripped surface is below the bottom of the $C$ base show and label the stripped surface also.

$3.$ Calculate the cross sectional areas for the following for the section:

Stripped topsoil

Earthworks: Cut $($left and right ditches separately$)$; Fill $($if any$)$

NOTE: assume $0$ subcut

Materials: Asphalt; Concrete; A base; $C$ base

Create a table to summarize your area results. Show the areas to the nearest $0\mathrm{.}001sqm.$ Hand in:

$2$

Your completed schematic section drawings showing the calculated design elevations and offsets, and other labels, as well as all calculations used to develop the sections.

Completed calculations and summary table for the cross section areas.

Solve these for me please