Class notes of Geotechnical Engineering course I used to teach at UET Lahore. Feel free to download the slide show. Anyone looking to modify these files and use them for their own teaching purposes can contact me directly to get hold of editable version.

1. 1
Geotechnical Engineering–II [CE-321]
BSc Civil Engineering – 5th Semester
by
Dr. Muhammad Irfan
Assistant Professor
Civil Engg. Dept. – UET Lahore
Email: mirfan1@msn.com
Lecture Handouts: https://groups.google.com/d/forum/geotech-ii_2015session
Lecture # 14
20-Oct-2017

2. 2
PRACTICE PROBLEM #3
Estimate the elastic settlement at the center of the raft (or mat)
foundation for a building with the given data;
qo = 134 kPa; B x L = 33.5 x 39.5 m
The strata comprises of a 6.0 m thick dense sand deposit (ES =
42.5 MPa) overlying a hard clay stratum (ES = 60 MPa)
extending to a depth of 14.0 m below NSL. A sandstone deposit
(ES ≥ 750 MPa) exists below 14.0 m depth. The foundation is
placed at a depth of 3.0 m below NSL.

3. 3
IF
Square foundation; L/B = 1
Strip foundation; L/B ≥ 5

4. 4
IF
Square foundation; L/B = 1
Strip foundation; L/B ≥ 5

5. 5

6. 6
PRACTICE PROBLEM #4
Resolve Practice Problem #2 and determine the total
settlement at the center of concrete raft foundation with the
following additional information given;
Es for Top Soil = 15 MPa
Es for Sand = 18.5 MPa above WT and 11 MPa below WT
Es for Clay = 23.04 MPa
Consider the raft to be rigid.

7. 7
IF
Square foundation; L/B = 1
Strip foundation; L/B ≥ 5

8. 8

9. 13
CONCLUDED
REFERENCE MATERIAL
Foundation Analysis and Design (5th Ed.)
Joseph E. Bowles
Chapter #5
Principles of Geotechnical Engineering (7th Ed.)
Braja M. Das
Chapter #11
Essentials of Soil Mechanics and Foundations (7th Ed.)
David F. McCarthy
Chapter #10
(Schmertmann Method)
(Timoshenko & Goodier Method)
(Modified Mayerhof Method)