<p><p><strong>References:<br></strong><em>Bruce (1997b)<br>Bruce and Juran (1997)<br>Cadden et al. (2004)<br>DFI-ADSC (2002)<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>Sabatini et al. (2005) lists what must be observed and recorded as part of grout inspection. Volume 3 of Bruce and Juran (1997) provides a full description of these inspection procedures that should be performed during grouting operations.<br><ul> <li>Verify hole cleanliness (the hole should be flushed with water or air to remove any loose debris)</li> <li>Observe dry cement for indications of hydration</li> <li>Verify water/cement ratio and grout mix design (the grout should not contain lumps or exhibit any evidence of poor mixing)</li> <li>Verify that all grouting equipment is in good working order</li> <li>Record grout volumes and grout pressures with time for each micropile (should also be recorded for post grouting)</li> <li>Observe quality of grout at ground surface (i.e., when hole is full of grout)</li></ul><strong> </strong>Grout pressure should be measured as close to the point of injection as possible. The pressure gauge should always be monitored during grouting. The grout pressure and take needs to be monitored to ensure complete filling of hole and in an effort to prevent excessive heave or fracturing in the soil or rock.</p><p><strong>Accuracy and Precision</strong></p><p>Confirming the quality of the grout for use in the project is a straightforward and highly precise process.</p><p><strong>Adequacy of Coverage</strong></p><p>Grout inspection records are kept for every micropile installed. The frequency of cube testing and checking specific gravity of the grout varies based on project conditions.</p><p><strong>Implementation Requirements </strong></p><p>Confirming the quality of the grout is a straightforward process requiring minimal training or experience. Cube testing and checking the specific gravity are commonly performed and well understood procedures.</p><p><strong>General Comments</strong></p><p>Grouting observation records are used to confirm adherence to design specifications. “Care in execution of the grouting process can greatly impact the quality of the completed micropile and its load carrying capacity” (Sabatini et al., 2005).</p></p>