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What is the difference between a raft foundation and a mat foundation?
Wiki User
∙ 14y ago
They r the same. There is no difference.
Wiki User
∙ 14y ago
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What is difference between combined footing and raft foundation?
A Combined footing is a long footing supporting two or more columns in one row. While a Mat or Raft foundation is a large footing, usually supporting several columns in two or more rows.
What is mat foundation?
"The mat (or raft) foundation can be considered a large footing extending over a great area, frequently an entire building. All vertical structural loadings from columns and alls are supported on the common foundation. Typically, the mat is utilized for conditions where a preliminary design indicates that individual columns or footings would be undesirably close together or try to overlap. The mat is frequently utilitzed as a method to reduce or distribute building loads in order to reduce differential settlement between adjacent areas. To function properly, the mat structure will be more rigid and thicker than individual spread footing." A mat foundation is typically used when there are poor and weak soil conditions. (McCarthy, 2007)
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.
If a commercial buildings column is 50meters by 50meters what are the dimensions of the mat foundation?
i belive it would be 100meters high and 50meters left to right
Difference between deep and shallow foundation?
Shallow foundation: A type of foundation that is used when the earth directly beneath a structure has sufficient bearing capacity to sustain the loads from the structure Deep foundation: A type of foundation that is used when the soil near the ground surface is weak. 1. Light, flexible structure: older residential construction, residential construction which include a basement, and in many commercial structures, 2. Nice soil condition: hard, uniform soil. 3. Cheaper than deep foundation 4. Easier construction 5. Typically types: spreading footing foundation, slab-on-grade foundation, pad foundation, strip foundation, and raft foundation. Spreading footing foundation: controlled by several factors: lateral and vertical capacity, penetration through near surface layers likely to change volume due to frost heave or shrink-swell. Mat-slab foundation: the distribution of loads in a mat slab helps reduce differential settlement due to the non-uniform building loads 1. Heavy, rigid structure: other uncommon building, such as large bridge, tower, and the Empire State Building. 2. Poor soil condition: liquefaction, soft clay and sands. 3. Typically more expansive 4. More complex to construct and more time than shallow foundation. 5. Typically types: battered piles, bearing piles, caissons, and friction piles. Friction piles: Friction piles obtain a greater part of their carrying capacity by skin friction or adhesion. This tends to occur when piles do not reach an impenetrable stratum but are driven for some distance into a penetrable soil. Their carrying capacity is derived partly from end bearing and partly from skin friction between the embedded surface of the soil and the surrounding soil. End bearing piles: End bearing piles are those which terminate in hard, relatively impenetrable material such as rock or very dense sand and gravel. They derive most of their carrying capacity from the resistance of the stratum at the toe of the pile.
Difference between raft and mat foundation?
The raft will help to avoid any settlement that would occur to strip the foundation. The mat is just placed there to avoid slipping.
What is difference between combined footing and raft foundation?
A Combined footing is a long footing supporting two or more columns in one row. While a Mat or Raft foundation is a large footing, usually supporting several columns in two or more rows.
Difference between mat foundation and isolated footing?
Isolated footings are constructed invidually & Mat foundation is making of mat and connecting all footings with this mat
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 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.
What is mat foundation?
"The mat (or raft) foundation can be considered a large footing extending over a great area, frequently an entire building. All vertical structural loadings from columns and alls are supported on the common foundation. Typically, the mat is utilized for conditions where a preliminary design indicates that individual columns or footings would be undesirably close together or try to overlap. The mat is frequently utilitzed as a method to reduce or distribute building loads in order to reduce differential settlement between adjacent areas. To function properly, the mat structure will be more rigid and thicker than individual spread footing." A mat foundation is typically used when there are poor and weak soil conditions. (McCarthy, 2007)
What is a raft foundation?
1. Excavation of the soil up to required depth.2. Ramming the foundation bed.3. Cutting the concrete over the reinforcement.4. Laying the reinforcement over the the foundation bed.5. Pouring the cement concrete over the reinforcement.
What is the difference between CAT and MAT?
the "m"
What is the difference between mat and Matt?
Absolutely nothing.
Do you need piling with mat foundation?
yes
How can a mat foundation be constructed?
i love you alphine
How do you design mat foundation?
design procedure
