11. Stresses in Soil Mass (Das, Chapter 10)

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

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

Vertical Stress Due to a Point Load

Vertical Stress Due to a Point Load

Vertical Stress Due to a Vertical line Load

Vertical Stress Due to a Vertical Line Load

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

Vertical Stress Due to a Vertical Strip Load

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

Vertical Stress Due to Embankment Loading

Vertical Stress Below Center of Uniform Loaded Circular Area

Vertical Stress Below Center of Uniform Loaded Circular Area

Vertical Stress at Any Point Below a Uniformly Loaded Circular Area

Vertical Stress at Any Point Below a Uniformly Loaded Circular Area

Vertical Stress at Any Point Below a Uniformly Loaded Circular Area

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

Vertical Stress Caused by Rectangular Load

Vertical Stress Caused by Rectangular Load

Vertical Stress Caused by Rectangular Load 1 2 3 4

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

Influence Chart for Vertical Pressure

Example 10.10 3 m  25 mm

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: