Mat Or Raft Foundation Ppt

Determine the stress distribution beneath the foundation 5.

Mat or raft foundation ppt.

Here is the list of some of the major aspects when to use or choose a mat foundation. The spread footings cover over 50 of the foundation area because of large column loads. Working principle of raft foundation. It is a continuous thick concrete slab on the soil that extends the entire footprint of the building and increases the soil bearing capacity power.

If the loads transmitted by the columns in a structure are so heavy or the allowable soil pressure so small that individual footings would cover more than about one half of the area it may be better to provide a continuous footing under all columns and walls. Hydrostatic uplift resistance is needed etc. How to construct a raft or mat foundation 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.

Haque 2 shallow foundations are usually located no more than 6 ft below the lowest finished floor. It is use to support storage tanks industrial equipment s chimney s and various structure. In this project the soil profile shows that the bearing stress is around 100 kn m2. Determine the capacity of the foundation 2.

Mat and pile foundation noroz fiaz malghani 2. This foundation supports the entire building loads and safely transfer it to the ground. 6 mat raft foundation 7 types of mat foundations 8 to design mat foundation. Mat foundation often considered to be used when dealing with the following conditions.

The columns have high axial loads. Raft or mat foundation. Raft foundation presentation ppt when to use raft or mat foundation in construction for building foundation design it is one of the most important aspects is to choose the right foundation. The raft foundation is usually used with this kind of soil.

Lecture note cosc 421 m e. Mat foundation is also known as the raft foundation. Determine the settlement of foundation 3. The soil is soft with a low bearing capacity.

The raft foundation is a kind of combined footing that may cover the entire area under the structure supporting several columns in one rigid body. A shallow foundation system generally used when 1 the soil close the ground surface has sufficient bearing capacity and 2 underlying weaker strata do not. R a f t f o u n d a t i o n s 10. Usually mat foundation is spread over the entire area of the structure it is supporting.

To design raft foundations. Determine the differential settlement 4. Such a footing is called a raft or mat foundation.