THE UNIVERSITY OF HONG KONG

Chapter 6Mass Haul Diagram

CIVL1011/CIVL2111Transportation Engineering

CIVL1011/CIVL2111

162

Mass Haul Diagram

Cross section

Cross section in fill

Cross section in cut

Final profile grade

Final profile grade

Existing profile ofthe ground surface

CIVL1011/CIVL2111

163

Mass Haul Diagram

Cut and fill

Original profile

Final profileFill

Cut

From neighborhood

From outsidesource

CIVL1011/CIVL2111

164

Mass Haul Diagram

Cut and fill

Final road level

Haul

Free haul

Maximum economic haul

Overhaul

Longitudinal

Overhaul

CIVL1011/CIVL2111

165

Mass Haul Diagram

Example

Free haul = 500 m

Overhaul cost = $0.002 / m3 / m

Borrow and dumping cost = $0.6 / m3 (borrow 1 m3 and dump 1 m3)

Maximum overhaul = = 300 m002.06.0

Maximum economic haul = 300 + 500 = 800 m

800m

Cut 1 m3

Fill 1 m3

Cost for borrow and dumping = $0.6

Cost for transport in the site

= $0.002(800-500) = $0.6

CIVL1011/CIVL2111

166

X

Y

Balance linesx y

Max. economic haul

Quantityto beborrowed

Borrow fromsomewhere

Mass Haul Diagram

Balance line

Excavation

ExcavationGround profile

Profile grade B

DFill

Longitudinal section

A

EC

Accumulatedcut in excessof fill

a

b

c

d

e

Mass haul diagram

CIVL1011/CIVL2111

167

T UV

WX

800 m

H

I

J

K500 m

Mass Haul Diagram

Example

800 m

N

P Q

R

500 m

Borrow3500 m3

Waste

Waste1500 m3

Borrow

Borrow2000 m3

A

BC

D

EF

G L

MS

Y

Topology

Mass haul diagram

O

-5000 m3

+5000 m3

Free haul = 500 mMaximum economic haul = 800 m

Balance lines

CIVL1011/CIVL2111

168

THE UNIVERSITY OF HONG KONG

End of Chapter 6

CIVL1011/CIVL2111Transportation Engineering

CIVL1011/CIVL2111

169