civil engineering time-chainage or location time digram

1. JONA S, IZAAKS C, KEENDAWALA JGROUP 10

2. Content
 What is the Location-Time Diagram?
 Advantages of Location-time Diagram
 Disadvantages of Location-time Diagram
 Example
 Similarities
 Conclusion
 References

3. 1.What is the Location-Time
Diagram?
 Is also known as Time-Chainage diagrams, is a c
ombination of the bar chart and line-of-balance s
cheduling formats .
 method of graphically presenting a time schedul
e for all types of longitudinal projects such as :
 Pipelines
 Railways
 Bridges
 Tunnels
 Road

4. What is the Location-Time
Diagram?...
 Activities in location-time diagrams are displayed
both along a time axis and along a distance axis
according to their relative linear position.
 It shows not only the location of the activity but al
so the direction of progress and the progress rat
e.
 Activities can be presented as geometrical shape
s showing the occupation of the work site over ti
me such that conflicting access can be detected
visually.

5. 2. Advantages of Location-Time
Diagram
When Constructing
 Roads
 Railways
 Pipelines
 Tunnels
 Transmission Lines
 Bridges

6. Advantages of Location-Time
Diagram...
 Clearly communicate the scope by showing the p
roject details and the schedule in one view.
Easy to know :
 The order of activities or operations
 Where activities are happening locationally
 How activities must progress in relation to
direction and distance
 Time, key dates and holidays, etc.

7. 3.Disadvantages of Location-Time
Diagram
 It does not retain the logical relationship among a
ctivities, so both planning and updating are very
difficult in cases of large project.
 Time consuming to produce and a good deal of p
ractice is required to get them right.
 Can be costly to rearrange the existing layout an
d not very robust to disruption.
 Critical path and float is only apparent through vi
sual interpretation.

8. Activities
 Program activities and Duration
Activities Duration (week)
Set up site 4
Activity 1 4
Activity 2 6
Activity 3 4
Activity 4 3
Activity 5 5
Activity 6 5
Holiday
Offices for contractor and engineer
Excavation
Construction of SSG
Construction of Culvert
Drainage
Construction of Sub-Base
Construction of Base

9. LOCATION-TIME DIAGRAM

10. 5.SIMILARITIES
 all clearly depict time and sequence
 Applied to repetitive project ,except the bar char
t
 Good pictorial presentation of construction sequ
ences
 Indicate the progress

11. 6.CONCLUSION
 Location time diagram is more superior to the
other two scheduling methods or tools

12. 7.REFERENCES
 Cook,B & Williams,P.(2009). Construction plan
ning programming and control (3rd ed.). Singap
ore: john Wiley & Sons ltd.
 Peter, M, P. (2014). Time chainage: what is tim
e chainage. Retrieved from: http://www.timech
ainage.co.uk/principles.html