VME’s Foundation Elements

In precast construction system, the elements are casted at the factory in closed environment under quality supervision using state of the art machineries. The finished elements are transported to the site and erected.
Foundation for these buildings will be based on the nature of the soil.
• Pile foundation
• Open foundation
Elements in Foundation System
• Footing
• Pedestal
• Tie Beam

Components of Precast Foundation:

Footing:
Based on the nature of the soil, the type of foundation is decided. It will be either Pile & Pile Cap or Open Foundation.

Pedestal:
Top level of the pedestal is decided based on the finished floor level of the building. the pedestal is precast
with the foundation bolts or the dowel bars.

Tie Beam:
Tie beams connecting the columns are also pre-stressed and they will span between the columns

Footing Types:

  • Suitable for areas having very poor soil for considerable depths where Open Footings are not possible.
  • Grade of Foundation Concrete is M25
  • Open footing to keep the foundation Suitable for areas having good soil
  • Grade of Foundation Concrete is M25

Note: Foundations depth is based on soil condition.

FOUNDATION - PROCEDURE

Pile Foundation

Step 1: Boring for Pile
Step 2: Concrete Filling
(a) Placing of Reinforcement cage and Concreting.
(b) Placing of Precast Pile cap
Step 3:Pedestal Erection
Step 4:Placing of Precast Tie Beam

Open Foundation

Step 1: Excavation
Step 2: Placing of Precast Footing
Step 3:Pedestal Erection
Step 4:Placing of Precast Tie Beam Beam

PEDESTAL

Pedestal Connection Type:

TIE BEAMS

Tie beams connecting the columns are also pre-stressed and they will span between the columns , which are about 8m to 9m.

Corbel in Pedestal Supports the Tie-Beam Connection to pedestal Which is grouted on erection.

Precast Tie Beam is also designed in a manner that it acts as a tie beam cum retaining wall between the two foundations.

Material Specifications

  • Precast Footing – M40
  • Precast Pedestal – M40
  • Precast Tie Beam – M40

Design Based on

• IS: 6006 – 1983 – Specification for Uncoated Stress relieved Strand for Pre-Stressed Concrete
• IS: 1343 – 1980 -Tensile Stress of Concrete, Elastic Deformation, Sections Uncracked in Flexure, Partial Safety Factors for loads.

Design Considerations

  • Foundation : Soil Condition and Wind Load
  • Precast Pedestal : Soil Condition and Wind Load
  • Precast Tie-Beam : Soil Condition and Wall Load

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