<p><p><strong>References:<br></strong><em>Burke et al. (2000a, 2000b)</em></p><p><strong>Method Summary</strong></p><p>Cone penetration tests can be used to verify the geometry of the finished columns. A good way to determine this is to perform a CPT at a distance 1.5 times the radius from the center of the column to create a base soil profile. CPTs should then be done at the estimated edge of the column and 1 foot inside and outside the estimated radius of the column. This will help determine the extent of the jet grouting.</p><p><strong>Accuracy and Precision</strong></p><p>Cone penetration tests are accurate and precise. However, they can overestimate the diameter of a column at depth because most columns are larger near the top.</p><p><strong> </strong><strong>Adequacy of Coverage</strong></p><p>Several CPTs need to be performed for each column that is investigated by this method. Typically, only a few columns are subject to CPT testing.</p><p><strong> </strong><strong>Implementation Requirements </strong></p><p>CPTs are a standard test and can be done by a number of contractors.</p><p><strong> </strong><strong>General Comments</strong></p><p>CPTs are useful upon completion of any jet grouting operation.</p></p>