<p><p><h2>Commentary</h2>Sand Compaction Piles (SCP) have not been utilized on a transportation project in the U.S. SCPs have been utilized on private project within the U.S. SCP costs are captured in a contract bid item which is measured by the lineal foot (LF). Included in this bid item are the material, equipment, labor, and incidentals to construct a sand compaction pile. Mobilization associated with the installation of sand compaction piles may be measured and paid for separately.</p><p>The typical design diameter of SCPs in Japan is 2.3 feet. The typical design diameter in the U.S. is 3.0 feet. The costs included in this document are for SCPs with a diameter of 3.0 feet.<br><h2>Cost Information Summary</h2>The following table lists construction cost items which are associated with sand compaction piles, along with approximate cost ranges. Cost ranges are based on information provided by specialty geotechnical contractors. 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 constructing sand compaction piles.</p><p><table class='tablepress' id='tablepress-121'><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 >Sand compaction pile</td><td >Greater Than 5,000</td><td >LF</td><td >$11.00</td><td >$24.50</td><td >Cost of sand materials is sensitive to material specifications and haul distance

- Cost range using on-site materials, such as dredged sand: $11.00 to $14.00
- Cost range using recycled materials: $18.00 to $22.00
- Cost range using processed and hauled in materials: $20.50 to $24.50

Unit costs will decrease as depth increases

Unit costs will increase if stiff, near surface soils are encountered which may slow production or require pre-augering
</td></tr><tr><td >Mobilization</td><td >1</td><td >LUMP SUM</td><td >$80,000</td><td >$100,000</td><td >Mobilization cost of $80,000 for relatively short mobilization distances.

Mobilization cost increases to $100,000 for a distance of 500 miles. Longer distance mobilizations will result in higher cost.

Phased projects may require multiple mobilizations</td></tr><tr><td >Embankment</td><td >Greater Than 5,000</td><td >CY</td><td >$-</td><td >$-</td><td >Use historical costs that are representative of the project quantity, project conditions and project location</td></tr></tbody></table><h2>Historical Cost Information</h2>Sand compaction piles have not been utilized on a publicly bid transportation project in the United States. Thus, there are no actual project costs to report.<br><h2>Conceptual Cost Estimating Tool</h2>Even though no publicly bid projects have been completed in the United States, cost information was gathered from contractors in order to develop a conceptual cost estimating tool.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>The tool considers a 3-foot diameter SCP and a spacing which reflects a replacement ratio (improvement ratio) of 10% as that is a typical replacement ratio to mitigate liquefaction of loose sandy layers.</p><p><a class="arrow-link" href="https://www.geoinstitute.org/sites/default/files/geotech-tools-uploads/… the Cost Estimating Tool</a></p></p>