CONSTRUCTION OF CONCRETE FOUNDATION

Construction of concrete foundation is divided into number of work activities with specific objectives and completion time for each activity is defined. Each activity for construction of concrete foundations has to be planned, as it requires specific equipment's at every stage. Activities for construction of concrete foundations can be divided into following:
1. Marking of foundation layout at site.
2. Earth excavation up to the required depth by means of machine.
3. Earth excavation and leveling of soil by means of hand operated tools.
4. Placing of PCC.
5. Placement of reinforcement steel
6. Erection of concrete formwork's for footings.
7. Placement of concrete and vibrating and leveling of concrete surface.
8. Removal of formwork after the concrete has set.
9. Curing of concrete for the required number of days.
10. Applying finishing coats on concrete surface.
11. Site cleanup.
12. Back-filling of excavation up to the required depth in the number of layers.
Each activity for the construction of foundation requires different skill sets of workmen and different equipment's. For a construction large construction projects, there can be many number of foundations to be casted on a single day. Therefore it is required to plan each and every activity of this construction. The project planner for foundation construction should determine the quantity of works involved in each activity and estimate the quantity of materials to be required. The number of tools and equipment's, workforce and other resources to be utilized for this construction should be well planned in advance. For example the placement of concrete could involve the total number of cubic meters of concrete involved in the activity. The building of forms would normally be measured by the square meter of concrete surface area.
Construction project activties
Fig: Construction project activities
All the activities for a foundation construction must be properly sequenced and resources required at different times of the activity must be estimated. From this information the possible necessary to complete the construction and the amount of resources required can be known. At this point the planner might not considered factors such as delays due to weather and other unforeseen circumstances. The construction plan for foundation is affected by following:
  • The ability of the contractor to accomplish the project.
  • The resulting costs of the project.
The rate of concreting for foundation construction should be estimated to complete the work within the time. The concrete work should not be stopped for more than 30 minutes unless all the concreting has been completed.

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