<p><p><strong>Reference(s):</strong></p><p><em>Baker (1983)<br>Waller et al. (1983)</em></p><p><strong>Method Summary</strong></p><p>The use of acoustic emission detection during the grouting process gives information on the response of the soil to grouting pressures. If hydraulic fracturing occurs it is detected and process control can be adjusted if needed.

<p><p><div><strong>Current FHWA Reference:</strong> <em>Baker (1983)</em></div><strong>Supporting References: </strong><em>Karol (2003), US Army Corps of Engineers (1995), Byle and Borden (1995)</em></p><p>Chemical grouting is used for structural or waterproofing purposes, or both.