1. 11. Stresses in Soil Mass
(Das, Chapter 10)
Sections: All except 10.1, 10.2, 10.5, 10.11

2. Stress in a Soil Mass Vertical stress due to a point load
Vertical stress due to a vertical line load
Vertical stress due to a vertical strip load
Vertical stress due to embankment load
Vertical stress below a center of a uniform loaded Circular area
Vertical stress at any point below a uniformly loaded Circular area
Vertical stress caused by rectangular load
Influence chart for vertical pressure

3. Vertical Stress Due to a Point Load

4. Vertical Stress Due to a Point Load

5. Vertical Stress Due to a Vertical line Load

6. Vertical Stress Due to a Vertical Line Load

7. Vertical Stress Due to a Vertical Strip Load
(Finite width and infinite length)
Calculate Dsz /q from 2z /B and 2x /B

8. Vertical Stress Due to a Vertical Strip Load

9. Vertical Stress Due to Embankment Loading
I2 is a function of B1/z and B2/z

10. Vertical Stress Due to Embankment Loading

11. Vertical Stress Below Center of Uniform Loaded Circular Area

12. Vertical Stress Below Center of Uniform Loaded Circular Area

13. Vertical Stress at Any Point Below a Uniformly Loaded Circular Area

14. Vertical Stress at Any Point Below a Uniformly Loaded Circular Area

15. Vertical Stress at Any Point Below a Uniformly Loaded Circular Area

16. Vertical Stress Caused by Rectangular Load
(under corner of the loading area)
I3 is a function of m and n

17. Vertical Stress Caused by Rectangular Load

18. Vertical Stress Caused by Rectangular Load

19. Vertical Stress Caused by Rectangular Load1 2 3 4

20. Example 10.9 1
2 m
2 m A
4 m A 2
3 m
1 m
2 m A
1 m

21. Influence Chart for Vertical Pressure

22. Example 10.10
3 m  25 mm

23. Newmark’ Chart
Determine the depth, z, where you wish to calculate the stress increase
Adopt a scale as shown in the figure
Draw the footing to scale and place the point of interest over the center of the chart
Count the number of elements that fall inside the footing, N
Calculate the stress increase as: