Pilesound is committed to each of our offered services by investing in specialization and ample supporting equipment. Services provided by Pilesound may be applied to your project in multiple ways. Our depth of resources enables us to assess different scenario options and implement a preferred method to best address your specific challenge. In the field, our experienced Professional Engineers endeavor to spot and address issues before they become problems, interpret results on-site in real-time, and provide seasoned expertise- all while applying critical analysis and nuanced attention to detail. Information on each of our services is provided below. Feel free to call us to discuss which of our services, or a combination thereof, may best address your specific requirements.

Hydroacoustic Monitoring

Pilesound provides hydroacustic monitoring services using state of the art ANSI Type 1 equipment from both Bruel & Kjaer, Larson & Davis and submersible autonomous systems from Loggerhead Instruments, Inc. Pilesound uses proprietary software for data processing and presentation of sound metrics unique to this work.

Pilesound’s extensive experience in heavy marine construction aids us in the developing and implementing a work plan that meets client and agency requirements. Our plans focus on obtaining the required data in a manner that minimizes support requirements and disturbance to the contractor’s operations.

Pilesound has performed hydroacoustic monitoring for public and private agencies and contractors in Alaska, Idaho, Oregon, Washington and British Columbia. Pilesound can combine hydroacoustic monitoring and dynamic pile monitoring to provide our clients with a suite of technical services which eases scheduling effort and limits on-site personnel costs.

Dynamic Testing and Analysis of Driven Piles

Dynamic pile testing consists of measurement and analysis of force and velocity components of an energy wave introduced to a pile top during a high strain impact event. Satisfying ASTM D4945 standards, measurements are collected using strain gauges and accelerometers attached near the pile top and processed by a Pile Driving Analyzer® (PDA) manufactured by Pile Dynamics, Inc. Dynamic testing provides real time information regarding transfer energy from the hammer to the pile top, pile material stresses, pile integrity information and an estimate of soil resistance to driving.

After the measurements are made our engineers use CAPWAP® signal matching software to evaluate the ultimate soil resistance with detailed break-out of the shaft resistance distribution, and obtain further information on driving stresses and pile integrity.

Results from dynamic testing enables informed decisions in the field and office effectively supporting your engineering and construction goals.

Wave Equation Analysis

Wave equation analyses of pile driving use mathematical models to evaluate the behavior of a pile hammer, driving system, pile and soil resistance during hammer action.

Pilesound uses GRLWEAP® in the preconstruction phase to aid clients’ selection and approval of appropriate driving equipment, predict driving stresses during pile installation, and comment on other aspects of constructability.

Generally, aspects of the soil response and hammer performance should be verified by dynamic measurements and CAPWAP® analyses, static load testing, or other suitable methods of analysis and inspection. Pared with site specific dynamic monitoring data, Pilesound uses wave equation analysis to assist in our clients’ development of field acceptance criteria for driven piles.

SPT Hammer Energy Testing

Dynamic measurements of energy transferred to sampling rods provides data which may be used to correct (normalize) Standard Penetration Test data (or Becker hammer tests) to a reference energy level. Such data is particularly relevant to engineers who evaluate liquefaction potential using SPT data.

Dynamic measurements are made using an instrumented section of SPT or Becker hammer rod. The instrumented rod can be quickly attached to the top of the drill rod before sampling begins and removed for reuse when the sample is complete. This approach easily accommodates different style hammers and ram weights.

Under certain circumstances primary or supplemental data may be obtained using a Hammer Performance Analyzer® (HPA). The HPA uses RADAR technology coupled with either digital or strip-chart output which indicates the velocity of a visible falling ram.

Crosshole Sonic Logging

Crosshole Sonic Logging (CSL) is a method of evaluating the soundness of the concrete in drilled shafts or other concrete foundations. CSL tests are completed by passing an ultrasonic emitter and receiver probe within water-filled CSL access tubes which extend into the concrete.

The access tubes are typically Schedule 40 steel pipe and extend from the bottom of the shaft to a level that is above the concrete surface. Measurements are collected by pulling the CSL probes upward from the bottom of the shaft for various combinations (pairs) of the available access tubes to evaluate the material between those tubes.

Pilesound uses state of the art equipment manufactured by PileTest and has extensive experience with collection and evaluation of CSL data.

Low Strain Testing

Low strain sonic Pulse-Echo testing is a nondestructive method for integrity and length assessment of wood or concrete deep foundations. Pilesound uses a Pile Integrity Tester ® (PIT) manufactured by Pile Dynamics, Inc. to perform low strain testing in accordance with ASTM 5882.

The PIT equipment is portable and accommodates various test configurations for new or existing structures with challenging access constraints. The ease of setup and execution often allows for numerous foundations to be tested in a single day. The results of Pulse-Echo testing are a supplement to routine inspection for auger-cast piles and should thus be combined with such routine inspection.

This low strain method is generally unsuited to evaluation of the unknown length of steel piles, and it also has limitations when testing long complex piles. Under certain situation data may be best evaluated in the frequency domain rather than the time domain.