Presentation that shows a fast resume of the majority of different types of foundations we use to build transmission lines in Brazil.

1. DIFFERENT TYPES OF
FOUNDATIONS

2. TYPES OF FOUNDATIONS FOR TRANSMISSION LINES
▸ COMPRESSION (SELF SUPPORTED & CENTRAL TOWER)
▸ HELICAL PILES
▸ DRILLED SHAFTS
▸ PRECAST
▸ PRECAST PILES
▸ I - BEAM PILES
▸ AUGER CAST
▸ FOOTING
▸ TENSION (GUY TOWER)
▸ HELICAL PILES
▸ DRILLED SHAFTS
▸ PRECAST
▸ TIE RODS

3. DRILLED SHAFTS
▸ CONCRETE SOLUTION
▸ CAN BE MADE BY AN UNQUALIFIED HAND
OF WORK
▸ CAN NOT BE EXECUTED ON SOILS WITH
WATER
▸ SOILS NEED TO BE STABLE FOR EXCAVATION
▸ MINIMUM 10 DAYS FROM EXECUTION TO
RELEASE OF LOAD APPLICATION

4. PRECAST
▸ CONCRETE SOLUTION
▸ CAN BE MADE BY AN UNQUALIFIED HAND OF
WORK
▸ CAN BE EXECUTED ON SOILS WITH WATER
▸ SOILS NEED TO BE STABLE FOR EXCAVATION
▸ MINIMUM 1 DAY FROM EXECUTION TO RELEASE OF
LOAD APPLICATION
▸ SURFACE SOILS NEED TO BE A GOOD LOAD
CAPACITY (Nspt>10)

5. PRECAST PILE
▸ CONCRETE SOLUTION
▸ CAN BE MADE BY AN UNQUALIFIED HAND OF WORK
▸ CAN BE EXECUTED ON SOILS WITH WATER
▸ SOILS NEED TO BE STABLE FOR EXCAVATION (CONCRETE
CAP)
▸ MINIMUM 1 DAY FROM EXECUTION TO RELEASE OF LOAD
APPLICATION
▸ THE SOILS MUST HAVE GOOD COHESION TO SUPPORT THE
SIDE CROSS
▸ VERY LARGE AND HEAVY EXECUTION EQUIPMENT

6. I-BEAM PILE
▸ STEEL SOLUTION
▸ CANNOT BE MADE BY AN UNQUALIFIED HAND OF WORK
▸ CAN BE EXECUTED ON SOILS WITH WATER
▸ SOILS NEED TO BE STABLE FOR EXCAVATION (CONCRETE CAP)
▸ MINIMUM 1 DAY FROM EXECUTION TO RELEASE OF LOAD
APPLICATION
▸ THE SOILS MUST HAVE GOOD COHESION TO SUPPORT THE SIDE
CROSS
▸ VERY LARGE AND HEAVY EXECUTION EQUIPMENT
▸ A WELDER REQUIRED DURING IMPLEMENTATION TO MAKE THE
AMENDMENTS

7. AUGER CAST
▸ CONCRETE SOLUTION
▸ CANNOT BE MADE BY AN UNQUALIFIED HAND OF WORK
▸ CAN BE EXECUTED ON SOILS WITH WATER
▸ SOILS NEED TO BE STABLE FOR EXCAVATION
▸ MINIMUM 10 DAYS FROM EXECUTION TO RELEASE OF
LOAD APPLICATION
▸ THE SOILS MUST HAVE GOOD COHESION TO SUPPORT
THE SIDE CROSS
▸ VERY LARGE AND HEAVY EXECUTION EQUIPMENT

8. FOOTING
▸ CONCRETE SOLUTION
▸ CAN BE MADE BY AN UNQUALIFIED HAND OF
WORK
▸ CAN NOT BE EXECUTED ON SOILS WITH WATER
▸ SOILS NEED TO BE STABLE FOR EXCAVATION
▸ MINIMUM 10 DAY FROM EXECUTION TO RELEASE
OF LOAD APPLICATION
▸ SURFACE SOILS NEED TO BE A GOOD LOAD
CAPACITY (Nspt>10)

9. DRILLED SHAFTS
▸ CONCRETE SOLUTION
▸ CAN BE MADE BY AN UNQUALIFIED HAND
OF WORK
▸ CAN NOT BE EXECUTED ON SOILS WITH
WATER
▸ SOILS NEED TO BE STABLE FOR EXCAVATION
▸ MINIMUM 10 DAYS FROM EXECUTION TO
RELEASE OF LOAD APPLICATION

10. PRECAST
▸ CONCRETE SOLUTION
▸ CAN BE MADE BY AN UNQUALIFIED HAND OF WORK
▸ CAN BE EXECUTED ON SOILS WITH WATER
▸ SOILS NEED TO BE STABLE FOR EXCAVATION
▸ MINIMUM 1 DAY FROM EXECUTION TO RELEASE OF LOAD
APPLICATION
▸ SURFACE SOILS NEED TO BE A GOOD LOAD CAPACITY
(Nspt>10)
▸ NECESSARY RECONSTITUTION AND COMPACTION OF SOIL
WITH CEMENT

11. TIE RODS
▸ MIX SOLUTION
▸ CAN NOT BE MADE BY AN UNQUALIFIED HAND OF
WORK
▸ CAN BE EXECUTED ON SOILS WITH WATER
▸ MINIMUM 10 DAY FROM EXECUTION TO RELEASE
OF LOAD APPLICATION
▸ THE SOILS MUST HAVE GOOD COHESION TO
SUPPORT THE SIDE CROSS
▸ VERY MESSY EXECUTION EQUIPMENT

12. HELICAL PILES ARE:
- QUICKER
- CLEANER
- SAFER
- GOOD QUALITY CONTROL
- LESS PEOPLE ON THE FIELD
- READY TO RECEIVE THE LOAD
- GOOD LIFE SERVICE
- GOOD LOAD CAPACITY
- ENVIRONMENTAL FRIENDLY
PROBLEMS:
- HIGH COST EQUIPMENT
- COST OF RAW MATERIAL (FOR
SQUARE SHAFT & COUPLERS)
- EQUIPMENT SUPPORT
- TRUSTABLE TORQUE INDICATOR