Construction process of raft foundation

  • How is a raft foundation constructed?

    Raft foundations use slabs of reinforced concrete to cover a large surface area, often the entire footprint of the extension.
    This approach spreads the structural load over the entire foundation area, and the slab floats on the prepared ground surface, in the same way that a raft floats on water..

  • What are the 4 types of raft foundation?

    Raft Foundations Uses, Types & Cost

    Solid slab raft foundations.Slab beam rafts.Cellular rafts.Piled rafts.Balancing rafts..

  • What are the methods of design for raft foundation?

    Analysis of Slab Raft
    There are two approaches to raft foundation design: the conventional rigid method or the flexible method..

  • What is the construction method of piled raft foundation?

    The piled raft is a foundation constructed by combining both the piles and a raft foundation.
    Firstly, the piles are constructed and then the raft is placed combining all the piles.
    Interaction of the pile, soil, and raft is the key factor considered in designing the piled raft foundation..

  • What is the process of constructing a raft foundation?

    Construction Process of Raft Foundation
    Determination of the depth of raft footing.
    Excavation of the soil to a suitable depth.
    Soil Compacting.
    Laying a waterproofing membrane at the bottom.Jun 22, 2023.

  • A raft foundation is a sizable continuous slab of concrete used to carry the whole weight of the structure.
    This continuous flat concrete slab supports the numerous columns and walls of the construction with strongly reinforced steel, which also aids in transferring the weight to the ground.
Construction Process of Raft Foundation
  1. Determination of the depth of raft footing.
  2. Excavation of the soil to a suitable depth.
  3. Soil Compacting.
  4. Laying a waterproofing membrane at the bottom.
  5. Pouring 3" of cement-sand mix.
  6. Placing the reinforcement and ensuring the predetermined spacing between the reinforcing bars.
A raft foundation is constructed by first excavating the ground to a uniform, flat level. Then, a waterproof plastic sheet is laid over the earth, and a thin 3" layer of plain cement concrete (PCC) is poured just to create a perfectly flat and level base for the foundation.

How do you build a raft foundation?

The various construction steps of the Raft foundation are enumerated below Determination of the depth of raft footing.
Excavation of the soil to a suitable depth.
Soil Compacting.
Laying a waterproofing membrane at the bottom.
Pouring 3" of cement-sand mix.

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What are the different types of raft foundation?

Basement is to be constructed.
Any other type of footing cannot be used advantageously.
Several types of Raft foundation may be used depending on the condition of soil and the load imposed on the foundation.
Different types of mat foundation are briefly discussed below. 1.
Flat Plate Mat This is the simplest form of raft foundation.

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What is raft footing?

Raft footing can be used wherein there is a significant chance of differential settlement.
In a raft foundation, the load is distributed over a wide area.
As such, the purpose of raft foundation in such cases is to reduce the overall pressure intensity exerted on the soil.

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When should a raft foundation be adopted?

One of the necessary principles of adoption Raft or mat foundation is when the columns are closely placed and the load imposed is high by the structure.
If the water level is high in some subsequent areas where construction is to be carried out raft foundation is generally suggested by engineers.

Construction process of raft foundation
Construction process of raft foundation

Waterway in Elsterwerda

The Elsterwerda-Grödel raft canal, established in the 18th century, serves as a waterway connecting the Pulsnitz River in Elsterwerda with the Elbe River near Grödel.
The Muisca raft

The Muisca raft

Pre-Columbian votive piece

The Muisca raft, sometimes referred to as the Golden Raft of El Dorado, is a pre-Columbian votive piece created by the Muisca, an indigenous people of Colombia in the Eastern Ranges of the Colombian Andes.
The piece probably refers to the gold offering ceremony described in the legend of El Dorado, which occasionally took place at Lake Guatavita.
In this ritual, the new chief (zipa), who was aboard a raft and covered with gold dust, tossed gold objects into the lake as offerings to the gods, before immersing himself into the lake.
The figure was created between 1295 and 1410 AD by lost-wax casting in an alloy of gold with silver and copper.
The raft was part of an offering that was placed in a cave in the municipality of Pasca.
Since its discovery in 1969, the Muisca raft has become a national emblem for Colombia and has been depicted on postage stamps.
The piece is exhibited at the Gold Museum in Bogotá.

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