Astm D 4945 Pdf

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ThePile Driving Analyzer (PDA) system is the most widely employed system for Dynamic Load Testing and Pile Driving Monitoring in the world. High Strain Dynamic Load Tests, also called PDA tests, assess the capacity of several piles in a single day. Pile Driving Analyzer systems also evaluate shaft integrity, driving stresses, and hammer energy when monitoring installation. If you plan to use your PDA to test non-driven piles make sure to read about that application as well.

PDA tests are performed during driving on pilot or production piles, taking advantage of the high strain impact provided by the driving hammer. Re-strike PDA tests are often recommended; if the driving hammer is no longer on location, a drop weight may be used to impact the pile.

The PDA-8G takes data obtained by accelerometers and strain transducers easily attached to the pile and calculates foundation capacity. In addition, it calculates multiple important quantities by the Case Method and iCAP. iCAP computes capacity in real time after every blow by signal matching (similar to CAPWAP). This calculation is often more accurate than Case Method capacity and better evaluates stresses in the pile.

With the PDA-8G, the engineer has the option of being in the field for the pile driving test or of using SiteLink Technology. SiteLink technology transmits PDA test data via Internet to an engineer located elsewhere who follows the test in real time. Test data displays and results are identical in both modes.

The PDA-8G is furnished with the PDA Software Suite, CAPWAP and GRLWEAP. CAPWAP analysis of PDA data is essential for a Dynamic Load Test. It provides the soil resistance distribution along the foundation and simulates a static load test. Extensive correlations between CAPWAP simulated and actual static load tests have proven the reliability of this method of determining pile capacity.

The PDA-8G conforms to ASTM D4945 and many other codes and specifications. The PDA Software Suite, consisting of PDA-S with iCAP, PDIPLOT2 and PDI-Curves, outputs reports that satisfy ASTM 4945 requirements. An SPT Software add-on to the PDA-S enables the PDA-8G to determine the energy transferred to SPT rods (read about this application).

Pile Dynamics recommends that all those who perform dynamic tests using the PDA take the Dynamic Measurement and Analysis Proficiency Test offered by PDI and PDCA. Read about the need for quality testing.

Built in calibration test function

Compatible with PDI Smart Sensors

Wireless range up to 100 m (328 ft)

Up to 16 universal (strain or acceleration, piezoelectric or piezoresistive) channels of wireless data acquisition1

Up to 8 universal (strain or acceleration, piezoelectric or piezoresistive) channels of traditional data acquisition

Piezoresistive accelerometer for high frequency and high acceleration events such as SPT, or steel on steel impacts

Piezoelectric accelerometer is more cost effective and useful in most other pile driving applications

Automatic balancing of signals and signal conditioning

Digital (software) integration of acceleration

Signal conditioning for force and acceleration have similar frequency response

Internal calibration check of strain and acceleration

Signal amplification capability

Triggers on any attached strain transducer

User adjustable pre-trigger buffer size

High speed internet data transmission using SiteLink Technology through broadband phone or other network device (additional desktop sharing software needed)

Data transmission through data capable mobile phone connected via USB

1 limited to one piezoelectric accelerometer per box

Operates in English, SI, or Metric units

Includes external USB keyboard, mouse, and WiFi (802.11 b,g,n)

Includes both soft side carry-on luggage case and hard transit case

Equipped for remote technical support using SiteLink Technology

Available TeamViewer desktop sharing software license for use with SiteLink Technology

Furnished with licenses for PDA Software Suite (PDA-S, iCAP, PDIPLOT and PDI Curves), GRLWEAP and CAPWAP

Full one-year warranty

Technical manual provided in PDF form on a USB drive

Pile Dynamics recently announced the release of a new model of Pile Driving Analyzer (PDA) System, the PDA-8G, billing it as the culmination of a complete redesign effort of the most widely employed system for dynamic load tests of any type of deep foundation.

Like previous PDAs, this eighth generation model performs the test normalized by the American Society of Testing and Materials standard ASTM D4945. The test, which for many decades has been accepted as an alternative for static load tests in more than 100 countries around the world, takes place either during pile driving or when a substantial mass impacts a non-driven pile. At each impact the Pile Driving Analyzer takes data obtained by sensors attached to the pile and calculates bearing capacity and other quantities.

The PDA-8G is being offered with either four or eight universal channels of data acquisition, all compatible with both cabled and wireless sensors. This enhancement from previous models is of particular interest to those who test large diameter shafts. Data transfer from the sensors to the PDA is extremely fast, suitable to test piles driven with high blow rate hydraulic hammers. The PDA-S software includes extensive data input help and output customization, and two real time capacity calculation methods (CASE and iCAP, which is similar to the well-respected CAPWAP software). Incidentally, a new version of the CAPWAP data analysis software is also being released. All PDA systems include licenses of CAPWAP, of the GRLWEAP Wave Equation Analysis software and of the complete PDA software suite.

Dynamic Load Testing is a fast, reliable and cost effective method of evaluating foundation bearing capacity. GRL can perform Dynamic Load Testing on driven piles, drilled shafts, auger-cast piles, micropiles, helical piles, and other cast in place foundations. It is often possible to conduct several dynamic load tests in a single day. In addition to bearing capacity, Dynamic Load Testing provides information on resistance distribution (shaft resistance and end bearing) and evaluates the shape and integrity of the foundation element.

The Dynamic Load Test involves a substantial ram mass that impacts the top of the foundation and causes it to experience a small permanent set. Prior to the test, GRL recommends an adequate hammer or drop weight. If neither is available, GRL supplies one of its APPLE Load Testing Systems.

Accelerometers and strain transducers attached to the foundation measure force and velocity as the drop weight hits it. Instead of strain transducers, GRL may also use a force transducer, which speeds up the test and in certain cases may yield more accurate force measurements. GRL analyzes data in real time with the Pile Driving Analyzer (PDA) dynamic testing system. Data is further analyzed with the CAPWAP software. GRL engineers furnish a detailed report for each Dynamic Load Testing project that includes a simulated static load test in the form of a calculated load-set curve.

Dynamic Load Tests are standardized by ASTM D4945 Standard Test Method for High-Strain Dynamic Testing of Piles. The test may also be configured to meet the requirements of the Rapid Load Test standard ASTM D7383 provided an adequate ram is available.

La prueba de carga dinmica en pilotes (PDA) logra determinar la carga ltima de pilotes o carga de trabajo segn se requiera mientras se obtiene informacin de la distribucin de la friccin a lo largo del pilote, carga por punta y evaluacin de la integridad del pilote. Usamos la tecnologa desarrollada por PileDynamics (PDI) y el apoyo de GRL Engineers para la interpretacin de los resultados. La prueba se realiza de acuerdo a la norma ASTM-4945-00.

Es un mtodo que se basa en registrar el tiempo que tarda una onda ultrasnica en propagarse desde un emisor a un receptor los cuales se desplazan simultneamente por dos tubos paralelos instalados previamente sujetos a la armadura del pilote.

Determinar por medio de la apertura de una celda hidrulica de carga y la medicin deldesplazamiento del pilote en profundidad, la resistencia por friccin y por punta de un pilote y sucomportamiento carga vs. desplazamiento, siguiendo lo estipulado en la norma ASTM D8169M-18

El anlisis de hinca simula el proceso de hinca delos pilotes en funcin del martillo a utilizar, laspropiedades del pilote y de las caractersticasgeotcnicas del suelo del proyecto, utilizando lateora de propagacin de ondas de esfuerzo.

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