1. Finally, C . M . Anderson's research included more effective stress management techniques. 2. The maximum past vertical effective stress is termed the " preconsolidation stress ". 3. It is often used in the calculation of the effective stress in a soil. 4. And the strength is very sensitive to the effective stress . 5. "? "'= the effective stress friction angle, or the'angle of internal friction'after Coulomb friction. 6. As the groundwater is pumped out, the effective stress changes, precipitating consolidation, which is non-reversible. 7. If water is being withdrawn, the spheres are forced together and the effective stress increases. 8. The concept of effective stress truly becomes interesting when dealing with non-hydrostatic pore water pressure. 9. This weight and pressure is the effective stress . 10. However, on reaching a state of zero effective stress such soils immediate dilate and regain strength.
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