<p><p><strong>Reference(s):</strong></p><p><em>DGGT AK2.8 (2002)</em></p><p><strong>Method Summary</strong></p><p>After installation and subsequent excavation of test columns, samples taken from test columns should be subjected to compressive strength testing in the laboratory to verify interior column capacity. It is acceptable to use load tests in place of laboratory tests to verify interior column capacity on the condition that load tests are carried out to 200% of the design load. Because of the high load, load tests for verifying interior column capacity may not be conducted on production columns. Additionally, if the columns are frictional, it may not be possible to reach such loads without exceeding the bearing capacity of the pile. During transportation and storage of column samples, it is important that they are not damaged and are hermetically sealed in a moist but not saturated condition (DGGT AK2.8 2002).</p><p><strong>Accuracy and Precision</strong></p><p>Compressive strength testing is a well understood and controlled test method. The accuracy of the results for determining average values of compressive strength depends on the consistency of installation procedures and material batches.</p><p><strong>Adequacy of Coverage</strong></p><p>Compressive strength testing can only be conducted on a limited number of samples. However, it is assumed that with the same installation and soil parameters, columns will perform similarly.</p><p><strong>Implementation Requirements </strong></p><p>Laboratory testing facilities are required.</p><p><strong>General Comments</strong></p><p>Verifying column interior capacity is necessary for evaluating the axial capacity of CSV columns for embankment support and structural support applications. Based on compressive strength testing, the shear strength of CSV column material can be deduced for slope stability applications.</p></p>