<p><p><h2>Commentary</h2>Payment for compaction grouting typically consists of a drilling pay item measured by the lineal foot (LF) and a grouting pay item measured by the cubic yard (CY). Included in these bid items are associated incidental costs such as:<br><ul> <li>Layout of a drilling pattern</li> <li>Instrumentation, monitoring, and quality control</li></ul>Other costs associated with compaction grouting which are measured and paid for separately include:<br><ul> <li>Mobilization</li></ul><h2>Cost Information Summary</h2>Unit costs for compaction grouting are highly variable, depending primarily upon the volume of grout and material costs. The following table lists items which are associated with the cost of compaction grouting and approximate cost ranges. Cost ranges are based on data from 2009 through 2011. Readers should carefully examine the project characteristics and constraints and determine to what degree if any these factors may influence the actual cost associated with compaction grouting.</p><p><table class='tablepress' id='tablepress-73'><thead><th>Pay Item Description</th><th>Quantity</th><th>Unit</th><th>Low Unit Price</th><th>High Unit Price</th><th>Factors Which May Potentially Impact Costs</th></thead><tbody><tr><td >Mobilization
</td><td >1</td><td >LUMP
SUM</td><td >$25,000</td><td >$50,000</td><td >Equipment mobilized includes: drill rig(s), compressor(s), grout mixers and pumps
Mobilization cost increases for distances greater than 500 miles
Phased projects may require multiple mobilizations
</td></tr><tr><td >Drilling
</td><td >Greater
Than 500</td><td >LF</td><td >$25.00</td><td >$75.00</td><td >Density and hardness of the material being drilled will affect the production rate
Abrasiveness of the material being drilled will impact the cost of wear items
</td></tr><tr><td >Grouting</td><td >500 to 25,000
</td><td >CY</td><td >$75.00</td><td >$750.00</td><td >Grout cost is sensitive to the grout mixture proportions, particularly the volume of Portland cement required per cubic yard
Local availability and freight cost should be considered for filler materials such as sand and fly ash
Unit costs will decrease as grout volume increases
</td></tr></tbody></table><h2>Historical Cost Information</h2>A sample of actual project costs is shown in the table below.</p><p><table class='tablepress' id='tablepress-74'><thead><th>Pay Item Description</th><th>Quantity</th><th>Unit</th><th>Low Unit Price</th><th>High Unit Price</th><th>Average Unit Price</th><th>No. of Bids</th><th>Bid Date</th><th>Source/Agency</th></thead><tbody><tr><td >Misc. Drilling for Grout Holes</td><td >1,550</td><td >LF</td><td >$61.00</td><td >$63.88</td><td >$61.96</td><td rowspan=2 >3</td><td rowspan=2 >8/21/2009</td><td rowspan=2 >Missouri DOT
</td></tr><tr><td >Misc. Compaction/ Permeation Grouting</td><td >1,100</td><td >CY</td><td >$90.00</td><td >$113.34</td><td >$97.78</td></tr><tr><td >Miscellaneous Work (Compaction Grouting)</td><td >5,600</td><td >CY</td><td >$225.00</td><td >$320.00</td><td >$270.83</td><td >6</td><td >1/16/2009</td><td >Arizona DOT</td></tr><tr><td >Compaction Grouting</td><td >284</td><td >CY</td><td >$270.00</td><td >$1,134.00</td><td >$605.88</td><td >8</td><td >6/2/2009</td><td rowspan=3 >California DOT</td></tr><tr><td >Compaction Grouting</td><td >761</td><td >CY</td><td >$40.50</td><td >$351.00</td><td >$121.23</td><td >8</td><td >1/06/2011</td></tr><tr><td >Compaction Grouting</td><td >242</td><td >CY</td><td >$540.00</td><td >$648.00</td><td >$575.37</td><td >8</td><td >3/9/2011</td></tr></tbody></table><h2>Conceptual Cost Estimating Tool</h2>The conceptual cost estimating tool is intended to be used to develop a preliminary project scoping cost estimate. This preliminary estimate can be based on the typical construction cost item values as contained in the Cost Information product or from user specified cost values when such are known. Users should read and understand the information in Cost Information product prior to using the cost estimating tool. You can download the Cost Estimating Tool to open a cost estimating spreadsheet for producing a preliminary project scoping estimate.</p><p><a class="arrow-link" href="https://www.geoinstitute.org/sites/default/files/geotech-tools-uploads/… the Cost Estimating Tool</a></p><p> </p></p>
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