<p><p><strong>References:<br></strong><em>Bruce et al. (1993)<br>Gibler et al. (2005)<br>Gomez et al. (2008a, 2008b)<br>Sabatini et al. (2005)</em></p><p><strong>Method Summary</strong></p><p>A micropile can be partitioned into two zones: the cased or free length in the upper part of the micropile and the bond length in the lower. A portion of the bond length is referred to as the effective bond length wherein the load applied to the micropile is transferred to the surrounding ground. A portion of the entire micropile length is called the elastic length, which is the length of the micropile that undergoes elastic shortening under a load.</p><p><strong>Accuracy and Precision</strong></p><p>The values obtained are approximate.</p><p><strong>Adequacy of Coverage</strong></p><p>The apparent elastic length and/or the effective bond length should be determined for every micropile load tested (ultimate or verification).</p><p><strong>Implementation Requirements </strong></p><p>Determining the apparent elastic length and the effective bond length requires simple mathematical understanding and can be completed as part of a standard static load test.</p><p><strong>General Comments</strong></p><p>The effective bond length can be used to estimate the ultimate capacity of the pile. The apparent elastic length is used to confirm the length over which elastic movements occur to allow for a more accurate measurement of elastic movement and total pile group settlement. These values can be used to assess a micropile’s ability to satisfactorily support its service load.</p></p>