Contour and Topo map Applications
Profile View (Longitudinal Sections): Roads,Canals, Pipes,…
Cross-Sectional View, Roads, Canals, Pipes,Building,…
Chapter 6-Vertical Sections
Longitudinal Sections- Vertical section along the centerline ofthe complete length of the work.
Cross-Section : Vertical sections drawn at right angles to thecenter line.
CUT (Level and slope- Upward from formation )
Fill or Embankments ( Downward from Formation)
Applications
1.Determining suitable gradients
2.Calculating the volume of earth work.
3.Supplying details of depth of cutting or height of filling required.
Important points
Leveling data and or contour map be obtained.
Scale should be as large as possible as it required or limited by paper size.Drawing should shows maximum possible details.
Horizontal scale is determined by the length of horizontal distance and thepaper size.
Vertical scale is determine by the difference of maximum and minimumreduce levels and the paper size. If the difference is small then largerscale is needed. On other hand if the difference if large then small scaleshould be considered.
Design elements must be available, example road (formation) width,building dimension, soil side slope,…
Datum: select datum level based on the lowest RL that is included I n thedrawing .
Example 1
.
Draw with proper scale on A4 the profile viewof a propose roads as show on the figurebelow
AB (level) point A follows natural terrain
BC is level RL B = RL C =75.18m
CD.
EF , RL E is 65 and RL F is 75 .
E
F
A
B
C
Road center line (R1 and R$) W4.00 M, G 1: 50 Side slope 1: 1
Storm water rising 1 in 40
Invert manhole S1 -2.97
Foul water rising 1 in 40
Invert manhole S1 -2.95
Example 2
Longitudinal section-Profile viewData collected and reduced
R1 @ 4.400
R4 (80) will 6.000
Slope 1in 50
HPC
RL
6.55
5.200
Calculation
Longitudinal section-Profile viewAlong Road centerline
Examples- Sewer line
Sewer is 0.80 m in width
Excavation: Vertical
Cross-Sections at 40 (RL is 5.200 and 60 (Rl is 6.800). Side Slope 1:1 Width4:00 m
Examples-Page 106
Cross-Sections Data
Draw sectional view along AB, AC, CDand BD sides of the building.
AB=50 meter and CD =40 meter
A
B
C
D
Homework
A uniform slope 5 meter road is proposed between point A and B, soil side slope
Is 30 degrees. Perform the following:
1.Draw to maximum scale on A4 a profile view of the road, show the formation location
2.Compute cut and fill along the center line for every station
3.Draw to proper scale the cross section at station A, B and every 20 meter