21 May 2013

Construction of MHP Project

Forebay

Headrace Canal
Intake

Penstockpipe

Pandhera Khola
Powerhouse

Construction Planning
•Planning in general is deciding in advance
about
•What are to be done ?
•When to be done ?
•How to be done that ?
•Who are doing that ?
•It selects future courses of actions and
specifies ways and means of implementing
them.
•It guides allocation of resources in controlling
way
•It implies systematic way of doing things.
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 21 May 2013

Construction Planning
• Pre construction activities
– Budgeting
– Land acquisition
– Ownership/ Formation of User's committee
– Water right issue
– Project Registration
– Site measurement and verification
• Intake site
• Headrace Canal alignment
• Settling basin site
Forebay
• Forebay site Penstockpipe
Headrace Canal Intake

• Penstock alignment Pandhera Khola

Powerhouse

• Powerhouse site
3
• Transmission distribution route inspection

Construction Planning
• Construction materials
• Locally available materials
– Sand
– Gravel
– Stone
– Wooden poles/
– Human resource
» Skilled
» Unskilled, etc.
• Procurement of Civil construction materials
– Cement
– Rod etc.
– CGI Sheet/ Gabion mesh wire, etc. 4

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 21 May 2013

Construction Planning
• Procurement of Electro-mechanical
Components
–Turbine
–Generator
–Control panel
–Penstock pipes
–Trash racks
–Conductor cables
–Base frames, etc.
– Poles/ Stay wire/ Insulators etc. 5

Construction Planning
• Transportation MHP components to the site
– Collection of local construction materials
– Transportation of Civil construction materials
– Transportation of Electromechanical components
– Transportation of Penstock pipe
• Construction of Civil Components
• Intake/ weir
• Headrace canal
• Settling basin
• Forebay
• Power house
• Tailrace canal
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Work Breakdown Structure (WBS)

• The work breakdown is the foundation of
project planning
• A complex project can be made manageable by
first breaking down into an individual
components in hierarchical order.
• The WBS is the basis for
– time estimation,
– resource allocation and
– cost estimation
– Identifying dependencies
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Work Breakdown Structure

MHP Project

Civil Mechanical Electrical

Construction Components Components

Intake Headrace Forebay

Construction Construction Construction
 Layout
 Earth Excavation
Stone soling
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Work activities
Estimated
S.N. Activity Activity name
duratin
(Weeks)
1 1-2 Tender call 4
2 1-4 Committee formation/ Land aquisition 8
3 2-3 Tender award 2
4 3-4 Site visit & verification 3
5 4-5 Procurement of construction materials 3
6 4-6 Local material collection 10
7 4-7 Pole cutting & preparation 12
8 4-8 Fabrication of electr-mech component 16
9 5-6 Transportation of construction materials 6
10 6-9 Intake construction 6
11 6-11 Forebay constraction 6
12 6-12 PH/ MF/ Tailrace 10
13 7-10 Pole erection 10
14 8-11 Transportation of electro-mech compon 6
15 9-11 Headrace canal construction 8
16 10-13 Erection T/D lines 10
17 11-12 Penstock Installation 9
18 12-13 Installation P/H equipment 8
9
19 13-14 Test run & commissioning 2

Scheduling: Bar-chart
Weeks

10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
S.N. Activity
1
2
3
4
5
6
7
8
9

1 1-2 4
2 1-4 8
3 2-3 2
4 3-4 3
5 4-5 3
6 4-6 10
7 4-7 12
8 4-8 16
9 5-6 6
10 6-9 6
11 6-11 6
12 6-12 10
13 7-10 10
14 8-11 6
15 9-11 8
16 10-13 10
17 11-12 9
18 12-13 8
10
19 13-14 2

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 21 May 2013

Gantt Chart

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Schedule of activities and Float time Calculation

Estimated
TF
S.N. Activity Activity name duratin EST EFT LFT LST Remarks
(Weeks) (LST-EST) (LFT-EFT)
1 1-2 Tender call 4 0 4 4 0 0 0 CA
2 1-4 Committee formation/ Land aquisition 8 0 8 9 1 1 1
3 2-3 Tender award 2 4 6 6 4 0 0 CA
4 3-4 Site visit & verification 3 6 9 9 6 0 0 CA
5 4-5 Procurement of construction materials 3 9 12 13 10 1 1
6 4-6 Local material collection 10 9 19 19 9 0 0 CA
7 4-7 Pole cutting & preparation 12 9 21 30 18 9 9
8 4-8 Fabrication of electr-mech component 16 9 25 27 11 2 2
9 5-6 Transportation of construction materials 6 12 18 19 13 1 1
10 6-9 Intake construction 6 19 25 25 19 0 0 CA
11 6-11 Forebay constraction 6 19 25 33 27 8 8
12 6-12 PH/ MF/ Tailrace 10 19 29 42 32 13 13
13 7-10 Pole erection 10 21 31 40 30 9 9
14 8-11 Transportation of electro-mech compon 6 25 31 33 27 2 2
15 9-11 Headrace canal construction 8 25 33 33 25 0 0 CA
16 10-13 Erection T/D lines 10 31 41 50 40 9 9
17 11-12 Penstock Installation 9 33 42 42 33 0 0 CA
18 12-13 Installation P/H equipment 8 42 50 50 42 0 0 CA
19 13-14 Test run & commissioning 2 50 52 52 50 0 0 CA
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Network diagram
7 10 10
21 30 31 40
10
2 2 3 12 5
4 4 6 6 12 13 12 8 13
42 42 50 50
4 3 6 10
3 2
1 8 4 10 6
14
0 0 9 9 19 19 9
52 52
6 6
16 9
25 25 8
8 6 11
25 27 33 33
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Gantt Chart

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0
Network diagram
0 0

Bid Invitation
(4 wks)

Bid Contract Fabrication Transportation

1 Evaluation 2 Award 3 Mech. Comp. 5 E/M Comp. 12
(2 wks) (2 wks) (8 wks) 16 16 (4 wks) 20 20
4 4 6 6 8 8

Foundation
(2 wks)
M/C
Fabrication Elect. Comp. 6
Site visit/ verification 4 (6 wks) 9 16 13
(2 wks) 6 13
22 22

Cons. Materials.
Collection
(3 wks)

Installation
(1 wk)
Turbine
7 14 Gen/ Elect. 18
9 16 23 23 Installation 25 25
(2 wks)
Weir/ Intake
Construct.

Installation
Penstock
(2 wks)

(1 wks)

P/H Construct.
(4 wks)
8
11 18
15
Construc.
(6 wks)

25 29
H/C

GT/DB Forebay Testing/

9 Construct. 10 Construct. 16 19 Commission 20
17 (5 wks) (2 wks) 29 29
(1 wk) 30 30
22 22 27 24 29

T/D Line
Pole erection 11 Installation 17
(5 wks) 26 24 (5 wks) 24 29

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