<p><p><strong>Reference(s):</strong></p><p><em>Bandimere (1997)<br>Graf (1992)</em></p><p><strong>Method Summary: </strong></p><p>This method has a very simple procedure. Typically SPT or CPT tests are run in the field to determine the initial site conditions. These may be converted to relative density based upon available correlations. Post-construction SPT and CPT tests should be run in relatively the same vicinity as those prior to the compaction grouting. An increase in relative density should be notable to determine if the area has been improved and meets the project requirements. If the pre-construction data is insufficient and the locations of the boreholes do not cover the targeted area, further testing should be completed prior to grouting.</p><p>SPT testing has been used primarily in the past, but it can produce some scatter due to a number of reasons. For this Graf (1992) recommends that CPT testing always be performed in conjunction or in place of SPT testing.</p><p><strong>Accuracy and Precision</strong></p><p>This method is generally an excellent indicator of an increase in density.</p><p><strong>Adequacy of Coverage</strong></p><p>The number of SPT or CPT tests conducted at a site is typically limited for economic reasons.</p><p><strong>Implementation Requirements </strong></p><p>SPT and CPT rigs are readily available and are commonly used in practice. Information from initial site investigations should be available to use.</p><p><strong>General Comments</strong></p><p>This method is very useful in determining how the site will perform, but should be used in conjunction with other methods.</p></p>