<p><p><h2>Commentary</h2>The cost of vibrocompaction is typically captured in a contract bid item which is measured by the lineal foot. Other costs associated with vibrocompaction which may be measured and paid for separately include:<br><ul> <li>Mobilization</li> <li>Granular backfill material placed around the vibrator probe</li> <li>Embankment material necessary to restore existing ground elevation after settlement</li></ul><h2>Cost Information Summary</h2>An average production rate for vibrocompaction is approximately 40 lineal feet per hour per vibrator. The following table lists items which are associated with the cost of vibrocompaction and approximate cost ranges. 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 the implementation of vibrocompaction.</p><p><table class='tablepress' id='tablepress-123'><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 >Vibrocompaction</td><td >Greater Than 2,500</td><td >LF</td><td >$5.00</td><td >$9.00</td><td >Production rates increase as depth increases.
In-situ density of soils impacts the average production rate.
</td></tr><tr><td >Mobilization</td><td >1</td><td >LUMP SUM</td><td >$20,000</td><td >$30,000</td><td >Mobilization cost increases for distances greater than 500 miles.
Phased projects may require multiple mobilizations.

</td></tr><tr><td >Granular Fill Material</td><td >-</td><td >TON</td><td >$7.00</td><td >$20.00</td><td >Use historical unit prices for MSE or shotcrete that are representative of the region, type of work and estimated quantity</td></tr></tbody></table><h2>Historical Cost Information</h2>Research efforts did not yield any vibrocompaction bid tabulation data from state highway agencies.<br><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>