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CV4902- Construction Methods

Dr David Chew

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Construction Considerations Site layout plan Outline of entire construction process Details of temporary works Choice of construction methods Types of construction machineries & equipment to be

used Potential problems & difficulties during construction Contingency plans for item above Safety precautions & measures Site maintenance & cleanliness Outline of construction cost Outline of construction schedule

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Outline of Construction Procedure Phase 1

* on-site works

- site clearance & mobilization

- erecting hoarding/safety signs

- setting up site-office & facilities

- creating access/excavation works

- piling & excavation

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Phase 1 (Continued)

* off-site works

- fabricate formworks

- fabricate reinforcements

- fabricate precast concrete (or steel)

beams

- fabricate precast concrete (or steel)

staircases

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Phase 2

* Construction of pile-caps

* Construction of concrete piers

* Construction of concrete cross-heads

Phase 3

* launching of precast concrete/steel beams

* launching of precast concrete/steel staircases

* concreting of slab (floor)

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Phase 4 * Erection of steel roof truss * Other building structural works under the

roof * Installation of roof cladding

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Phase 5

* inspection

* testing & commissioning

* permit for occupation/use

* handover

* operation

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Things To Look Out For Underground Services (Check, Double-

Check!) Existing Foundations (Removed?) Safety during Construction/Road Diversion Site Constraints Access for Works Launching of Precast Beams/Columns Launching of Roof Truss

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Site Constraints

Protection of Surrounding Structures/Facilities Types of Heavy Machineries to be Used Noise/Air/Water Pollution Disposal of Spoils and Wastes Limitation of Working Hours Just-In-Time Construction

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Safety Considerations Public Safety Safety Distance of Heavy Construction Machineries

(from Existing Buildings & roadway) Restrictions during Busy Traffic Hours Protection of Existing Facilities Stability of Temporary Supports Procedure for Beam/Column Launching & Securing Stability of Lifting Crane during Launching