Mat Foundation Settlement Calculation

The depth of significant stress increase in the soil below a foundation depends on the width of the foundation.

Mat foundation settlement calculation.

Mat or raft foundation is a large concrete slab supporting several columns in two or more rows. However the width of a raft foundation is larger than those of the isolated spread footings. Data however and if other than a strip from the mat is used as a beam on elastic foundation type of analysis the computational effort is substantial. The civilweb mat foundation design xls now calculates the maximum bending moments and shear forces present in each direction in the mat foundation.

The suite includes 6 different methods of settlement analysis including immediate elastic consolidation differential schmertmann settlement and settlement from si info. Foundation settlement calculation spreadsheet this suite of spreadsheets includes all the tools required to complete a settlement analysis of any shallow foundation in any soil. A simple spreadsheet such as the civilweb foundation settlement calculator spreadsheet can be used for this. The differential settlement may be arbitrarily taken as 20 mm 0 75 in if the total expected settlement a is not more than 50 mm or may be approximated using a rigidity factor kr.

That are sensitive to differential settlement. We would like to show you a description here but the site won t allow us. Spreadsheets are hard. Complete analysis design of a mat or raft foundation analyses uniform thickness finite mat or raft foundation with free ends and supported by a beam on elastic foundation.

It is used where the supporting soil has low bearing capacity. Foundation analysis and design 5 5 table 5 1 1 geotechnical parameters parameter value net bearing pressure to control settlement due to sustained loads 4 000 psf for b 20 feet 2 000 psf for b 40 feet may interpolate for intermediate dimensions. Settlement of 25 mm 1 in and a differential settlement of three fourths of the tolerable settlement which is about 19 mm 0 75 in.