Simple Ribbed Mat Foundation Design

For a successful design the layout of mat foundation should be carried out with due consideration of both settlements and bearing capacity.

Simple ribbed mat foundation design.

The bearing capacity increased by combining all individual footings in to one mat since bearing capacity is proportional to width and depth of foundations. A mat foundation also may be used to resist hydrostatic pressures or to bridge over small soft spots in the soil provided the mat is adequately reinforced. Academia edu is a platform for academics to share research papers. A waffle slab foundation also called a ribbed slab foundation is an above ground type of foundation used to provide load bearing capacity in expansive rocky or hydro collapsible soils.

Reinforced ribbed mat slabs 1. When the depth of beam exceeds 90 cm in simple beam and slab mat a rigid frame mat is referred. Mat or raft foundation is a large concrete slab supporting several columns in two or more rows. Raft or mat foundations.

Although mat foundations are more difficult and more costly to design than individual spread footings they can be used effectively. Slabs or foundations can be of any shape and can include edges shaped with circular and spline curves. It is used where the supporting soil has low bearing capacity. The foundation is created by placing a series of single use plastic forms set directly on grade to create a grid of ribs and then monolithically pouring a post tensioned rebar or fiber reinforced concrete.

Post tensioning may be included in both slabs and beams to balance a percentage of the self weight. Suspended slabs can include flat two way waffle and ribbed framing systems. Mat raft foundation design in staad pro. In such design basement walls act as ribs or deep beam.

This document provides guidance for the design and construction of conventionally reinforced ribbed mat slab rrms foundation systems. In this mat pedestals are provided at the base of the columns. A raft foundation also called a mat foundation is essentially a continuous slab resting on the soil that extends over the entire f. Rigid frame mat this type of mat is used when columns carry extremely heavy loads.