Services / GRLWEAP Wave Equation Analysis

GRL Engineers perform GRLWEAP Wave Equation Analysis to find the relationship between bearing capacity, pile stress and blow count, known as the “bearing graph.”  The Wave Equation analysis takes the given blow count from pile installation logs and the bearing graph yields the predicted bearing capacity. Given a required ultimate capacity, the bearing graph predicts the associated blow count. The bearing graph also predicts the maximum tension and compression stresses.

GRL Engineers also use the GRLWEAP to perform drivability analyses. A drivability analysis calculates recommendations on cushion stiffness, hammer stroke and other driving system parameters that optimize blow counts and pile stresses during pile driving. For example, an estimated blow count as a function of depth through input soil profile, and if a soft or hard layer causes excessive tension or compression stresses or unacceptable blow counts.

The founders of GRL Engineers, Inc., developed GRLWEAP Wave Equation Analysis. GRL Engineers are experts in the use of this software program, allowing them to provide analysis results quickly.


Enter the capacity you wish to mobilize, in Tons:

What type of test do you wish to perform?

What is your bearing strata?

Find out which APPLEs meet your needs, then contact the GRL office that serves your project location to discuss your specific project requirements.

Standard GRL-Cell Details*

GRL-Cell Capacity (tons) Maximum Test Load (tons) Outside Diameter (inches) Maximum Stroke (inches)
350 750 12 9
750 1500 16 9
1100 2200 21 9
1500 3000 23 9
2000 4000 28 9

*GRL-Cell sizes are subject to change.

Learn More: