Given the data of Example 8.22. Instead of a load on the surface, compute the depth of an excavation to cause a reduction in stress at the bottom of the excavation of 250 kPa if p - 2 Mg/m3. The excavation plan area is shown in Fig. Ex. 8.22a.
Example 8.22
![1985_a9239166-cfaf-4a16-beb3-4b9f026437e4.png](https://secure.tutorsglobe.com/CMSImages/1985_a9239166-cfaf-4a16-beb3-4b9f026437e4.png)