This Presentation made by Forth Group to fulfill assignment of Construction Method Subject in Department of Civil Engineering, Sebelas Maret University (UNS) Surakarta

1. Earthworks of Engineering
Faculty Parking Area
Presented by: 4th group

2. Introductions
Nowadays, Parking Area has become one of infrastructures
needed along increasingly of vehicles volume especially at
Engineering Faculty. Problems arising from the provision of
parking space itself is vacant land needed. Vacant land
located in the north of 4th Building requires an efficient
construction methods that can be implemented practically

3. Work Plan
Step 1 • Identification
Step 2 • Working Method Selection
Step 3 • Heavy Equipment Analysis
Step 4 • Cost Plan Analysis
Step 5 • Scheduling
Step 6 • Working Simulation

4. Route for
Trucks
Start
Finish

5. Identification

6. Identification
The following are main working items:
• Land clearing and top soil stripping
The purpose is for clearing the area from organics, therefore it
will ready for next work.
• Soil heap work
This work is done by collecting soil from the excavation to be
made as a pile of soil on the surface of the ground that has
lower elevation than planned.

7. Identification
• Total Volume = Area x Depth
= 610,13 x 1,65
= 1006,715 m3
• Stripping Volume = Area x Stripping Depth
= 610,13 x 0,15
= 91,5195 m3
• Digging Volume = Total Volume – Stripping Volume
= 1006,715 – 91,5195
= 915,195 m3

8. Working Method Selection

9. Working Method
• Land clearing and top soil stripping
Using the excavator as the primary heavy equipment which is
used for stripping and digging. The main idea is to use heavy
equipment as little as possible, but efficient.
• Soil heap work
LM that are transported by trucks to hauling site will condense
by the compactor. The results are expected not to exceed a
schedule of excavator.

10. Heavy Equipment

11. Heavy Equipment Analysis
• Excavator
• Truck
• Compactor

12. Excavator
Productivity of Backhoe Komatsu PC60-1
• Cycle time (T) = 0,4
• Bucket Capacity (BC) Stripping = 0,25
• Bucket Capacity (BC) Digging = 0,28
• Siteplan Management Condition = 0,75 (clay)
• Bucket Factor (BF) Stripping = 0,5
• Bucket Factor (BF) Digging = 0,8
• Productivity of Stripping
60/T×BC×JM×BF = 60/0,4×0,25×0,75×0,5 = 14 m3/hour
• Productivity of Digging
60/T×BC×JM×BF = 60/0,4×0,28×0,75×0,8 = 25,2 m3/hour

13. Truck
Truck Productivity
• Distance = 500 m
• Average Speed = 20 km/hour
• Capacity = 5 m3
• Cycle Time
• Loading = 11,9 minutes
• Single Trip Time = 3 minutes
• Position Setting = 5 minutes +
19,9 minutes
Amount trip/hour = 60/15,9
= 3,01 ≈ 3 trip

14. Compactor
Productivity of Compactor Vibro 10 ton
• Effective Width of Wheel (L) = 80 cm
• Compactor Speed (V) = 2 km/hour
• Total Tracks of Compacting (N) = 10
• Layer Heights = 20 cm
• Productivity
F= (L×V×JM)/N=(0,8×2000×0,75)/10= 120 m2/layer/hour
Compactor Productivity = 0,2×120 = 24 m2/hour

15. No. Work Equipment
Volume
(m3)
Productivity
(m3/hour)
Number of
Equipment
Time
(hour(s))
1 Stripping
Backhoe Komatsu
PC 60-1
91,5195 14 1 6,5
2 Digging
Backhoe Komatsu
PC 60-1
915,195
25,2
1 37
3 Loading Truck 1143,994 15 2 77
4 Compacting Vibro 10 ton 823,6755 24 1 35
Equipment Demand

16. Cost
No. Work Equipment
Number of
Equipment
Time of
Rent
(hour(s))
Rent Cost
(all in)
(Rp)
Total Cost
(Rp)
1 Stripping
Backhoe
Komatsu
PC 60-1
1 7 190.000 1.330.000
2 Digging
Backhoe
Komatsu
PC 60-1
1 37 190.000 7.030.000
3 Loading Truck 2 77 50.000 7.700.000
4 Compacting
Vibro 10
ton
1 35 240.000 8.400.000
TOTAL 24.460.000

17. No. Work Ratio
Time
(day(s))
1 2 3 4 5 6 7
1 Stripping 0,055 1
2 Digging 0,287 6
3 Loading 0,315 6
4 Compacting 0,343 5
TOTAL 1 7
Barchart and S-Curve

18. Working Simulation

19. Mob Demob

20. Stripping

21. Digging

22. Loading

23. Loading

24. Compacting

25. Total Cost
No. Work
Equipme
nt
Number
of
Equipme
nt
Cost
(Rp)
Mob
deMob
(Rp)
Total Cost
(Rp)
1 Stripping
Backhoe
Komatsu
PC 60-1
1 1.330.000 1.500.000 2.830.000
2 Digging
Backhoe
Komatsu
PC 60-1
1 7.030.000 - 7.030.000
3 Loading Truck 2 7.700.000 - 7.700.000
4
Compactin
g
Vibro 10
ton
1 8.400.000 1.500.000 9.900.000
10 % of Total Cost 2.746.000
TOTAL 30.206.000