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Volume 6 – Geotechnical Manual, Site Investigation and Engineering ...

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Chapter 5 INTERPRETATION OF SOIL PROPERTIES<br />

A direct correlation between the effective pre-consolidation stress <strong>and</strong> effective contact pressure<br />

(p o -u o ) measured by the flat dilatometer is given in Fig. 5.17, again noting that intact clays <strong>and</strong><br />

fissured clays respond differently. The shear wave velocity (V S ) can also provide estimates of σ p ', per<br />

Fig. 5.18. In all cases, profiles of σ p ' obtained by in-situ tests should be confirmed by discrete<br />

oedometer results.<br />

Figure 5.15 Pre-consolidation Stress Relationship with Net Cone Tip Resistance from Electrical CPT<br />

Figure 5.16 Relationship Between Pre-consolidation Stress <strong>and</strong> Excess Porewater Pressures from<br />

Piezocones<br />

5-16 March 2009

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