Project and Risk Management

Project and Risk Management

Construction Planning
NETWORK PROGRAMME FOR A BRIDGE PROJECT

A concrete bridge is to be constructed for a motorway project and the following activities, durations and sequences of work have been established.

An elevation and section of the proposed bridge is indicated in Fig 1.

Activity Duration
Site strip – complete bridge
Pier A
Excavate pier
Blinding to pier
Fix reinforcement & formwork to kicker
Concrete pier foundation
Reinforcement to abutment
Fix formwork
Concrete abutment
Strip Formwork
Deck slab (piers A to B)
Fix precast concrete beams
Fix formwork to deck
Fabricate and fix reinforcement
Concrete deck
Strip formwork to deck
Curing period prior to striking formwork 4 days

3 days
1 day
3 days **
1 day
4 days
5 days
1 day
2 days
**repeat activities on deck between piers B and C

1 day
5 days **
3 days
1 day
2 days
7 days
** repeat activities on deck between piers B and C

Resources to be allocated – Case 1

The following resources of temporary works and plant are to be allocated for the bridge construction.

One hydraulic excavator
One pier shutter
One set of formwork for the deck span between the piers.
An assessment is required of the minimum construction period for the bridge project based on the above resources.

Alternative considerations

Make suggestions for reducing the contract period by means of increasing resources for the project.
.

NOTE:- Produce a network diagram for the project utilising activity-on –arrow or precedence methods.

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