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What are the types of raft foundations?

Updated: 9/17/2019
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11y ago

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Types of raft foundation are

1. Solid slab raft

2. Beam and slab raft

3. Cellular rafts

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11y ago
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Q: What are the types of raft foundations?
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Can you list types of foundation in building?

Matt or Raft Foundation Combined Footings Pile Cap Foundations Isolated Foundations Continous Foundation


What are the types of mat foundation?

The type of mat foundations include flat plate mat, plate thickened under columns, and two-way beam and slab. The other types are plate with pedestal, rigid frame mat, and piled raft.


What are the advantages and disadvantages of raft foundation?

The main advantage of a raft foundation is that it is more economical. Another advantage is that it requires little excavation. The disadvantages of raft foundations are that there is a greater potential for erosion, and they require specific treatments to bear a load.


What are details of construction joint in raft foundation 1.2 mt deep?

The construction joint should be placed where there is the least amount of impact. This could include the slabs. These types of foundations are used in the United Kingdom and Australia.


WHAT ARE THE TYPE OF FOUNDATION?

The type of mat foundations include flat plate mat, plate thickened under columns, and two-way beam and slab. The other types are plate with pedestal, rigid frame mat, and piled raft.


How can you improve black cottan soil?

we can use cement grouting,to mix sand and lime stones and also use pile or raft foundations


Why is there a need for different building foundations?

According to soil condition, load, environmental conditions we need different types of foundations.......


What is a Boat starting with R?

Raft, riverboat and rowboat are boat types. They begin with the letter r.


What are the differents types of foundations used in a multistorey building?

deep foundation & piles


What disadvantages and advantages of pad foundations?

Using pads minimises costs for the concrete necessary at the same time reduce excavation needed which you would usually use for pile, raft and strip foundations. However they cannot take excessive weight such as a concrete office block or be used on 'fragile ground'


Why you have to use raft foundation?

A raft foundation, also known as a mat foundation, is a type of shallow foundation that is used in construction to distribute the weight of a building or structure evenly across a large area of soil. It is typically used when the soil's load-bearing capacity is relatively low, or when the building's loads are heavy and spread over a wide footprint. Here are some reasons why a raft foundation might be used: **Uniform Load Distribution**: Raft foundations are designed to distribute the load of a building uniformly over a larger area of soil. This helps prevent localized settlement that could occur with point loads or strip foundations. **Poor Soil Conditions**: If the soil at a construction site has low bearing capacity, meaning it can't support heavy loads without excessive settlement or deformation, a raft foundation can help distribute the loads over a larger area, reducing the pressure on the soil. **Variability in Soil**: In some cases, the soil properties might vary across the construction site. A raft foundation can help mitigate the effects of differential settlement, where one part of the building's foundation settles more than another due to varying soil conditions. **Heavily Loaded Structures**: Raft foundations are commonly used for buildings with heavy loads, such as multistory buildings, warehouses, or industrial facilities. The broad contact area with the soil helps prevent excessive stress on the ground. **Reduced Foundation Depth**: Raft foundations are shallow foundations, meaning they are located closer to the ground surface compared to deep foundations like piles or caissons. This can save excavation costs and make construction more efficient. **Economical Solution**: In some cases, a raft foundation might be more cost-effective compared to using deep foundations, especially when the structure's loads are spread out over a large area. **Stability in Poor Soil**: If the soil has a potential for lateral movement (such as in areas with high groundwater or seismic activity), a raft foundation can provide stability by distributing lateral forces over a larger area. **Preventing Differential Settlement**: In situations where multiple structures are built close to each other, a raft foundation can help prevent differential settlement that might occur if different structures have different foundation systems. It's important to note that while raft foundations offer several advantages, they might not be suitable for all construction scenarios. Factors such as soil type, building loads, local climate, groundwater levels, and structural design will all influence whether a raft foundation is the appropriate choice. Engineering professionals, including structural and geotechnical engineers, play a crucial role in determining the most suitable foundation type for a specific project based on site conditions and building requirements.


What is a transverse slab?

transverse slab is nothing but its like a raft foundation when structure is very high so much load is transversed to footings so in order to decrease point loads forces on raft foundation or foundations transver slabs are placed it will take all the loads from all parts of frame structures and transverse equally to soil