Post on 08-Jul-2016
description
THE UNIVERSITY OF HONG KONG
Chapter 6Mass Haul Diagram
CIVL1011/CIVL2111Transportation Engineering
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Mass Haul Diagram
Cross section
Cross section in fill
Cross section in cut
Final profile grade
Final profile grade
Existing profile ofthe ground surface
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Mass Haul Diagram
Cut and fill
Original profile
Final profileFill
Cut
From neighborhood
From outsidesource
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Mass Haul Diagram
Cut and fill
Final road level
Haul
Free haul
Maximum economic haul
Overhaul
Longitudinal
Overhaul
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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
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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
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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
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THE UNIVERSITY OF HONG KONG
End of Chapter 6
CIVL1011/CIVL2111Transportation Engineering
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