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PILE LOAD TESTING
 
 

 

  • Pile load testing services is an important factor for the piling works that should be properly planned and factored into the project schedule and project costs at an early stage in order to validate the design safety factors, pile design & lengths, to establish the pile installation criteria and to quality control the piling works.
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  • Static pile load testing (axial and lateral)
  • Dynamic compression load testing by pile driving analyzer (PDA)
  • Pile integrity testing (PIT)
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    STATIC PILE LOAD TESTING
     
  • The test procedure is based on the direct measurement of pile head displacement in response to a physically applied load. The test pile is loaded using a calibrated hydraulic jack that applies the test load to the pile by pushing against a beam placed directly over the test pile. The test beam is restrained by an anchorage system consisting of reaction piles installed in the ground to provide tension resistance. Once the load test frame is installed and fully instrumented, the hydraulic jack applies the test load in a series of increments according to the testing requirements as per project specifications. Each load is held for a certain amount of time until either twice the design load or pile failure is reached, whichever comes first. Pile movement is recorded with each incremental load.
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  • Piles can be tested for compression, tension or lateral loads. By providing actual capacity and deflection values, the test results can be used to confirm that the pile design load can be adequately supported. Depending on the test pile’s performance, the results may also allow for project cost savings by permitting an increase in the pile design load, a reduction in the overall pile length, or a quantification of capacity in difficult or unknown soil conditions.
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  • Establishing testing programme
  • Pile testing planning
  • Pile Installation and pile head preparation
  • Reaction system
  • Load application system and monitoring
  • Displacement measurement
  • Testing Procedure
  • Documentation and reporting (evaluation of test results / conclusions and recommendations)
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    DYNAMIC COMPRESSION LOAD TESTING BY PILE DRIVING ANALYSER (PDA)
     
  • Dynamic load testing of piles by Pile Driving Analyser (PDA) is a fast and effective method of assessing foundation bearing capacity that requires instrumenting a deep foundation with accelerometers and strain transducers (sensor) and analysing data collected by these sensors. PDA testing can be undertaken during initial driving or during re-strike drives after allowing soil setup on the pile for a suitable period of time. in order to verify pile resistance, CAPWAP analysis is performed on field data from a selected representative hammer blow from the PDA test record and the following information on the pile resistance can be derived:
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  • Pile load bearing capacity
  • Skin friction distribution over the pile length and the end bearing capacity
  • Prediction of load-settlement chart
  • Evaluation of pile integrity
  • Hammer performance
  • Maximum driving stresses
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    PILE INTEGRITY TESTING (PIT)
     
  • Pile Toe Level
  • Shaft restraints
  • Cracks
  • Reductions in section
  • Zones of poor quality concrete
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  • The test method is performed with a hand held hammer, a sensitive accelerometer and the Pile Integrity Tester. The accelerometer is attached to the top of the pile, and then a compressive wave is generated by tapping the pile head with a hammer. When the downward compression wave encounters a change in cross section or in concrete quality, it generates an upward tension wave that is later observed at the pile top. The velocity recorded along with the subsequent reflections from the pile toe or pile discontinuities are graphically displayed. The effectiveness of the system is limited to a pile length not exceeding (30 to 60) * pile diameters depending on soil condition and concrete quality.
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    GEOTECHNICAL INVESTIGATION TESTING METHODS
     
  • Dynamic Core Drilling Testing
  • Standard Pentration Testing
  • SPT Testing Services
  • Plate Load Testing
  • Soil Electric Resistivity Testing
  • Field density Testing
  • Field Permeability Testing
  • Field CBR Testing
  • Lateral Load Testing
  • Pile Load Testing
  • Bentonite Powder Testing
  • Compaction Testing
  • Electrical Resistivity Test (In-situ)
  • Geotechnical Investigation
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    GEOTECHNICAL INVESTIGATION SERVICES
     
    GEOLOGICAL ANALYSIS

    Geophysical Analysis laboratories to do all your Geology Analysis, surveys, exploration, characterization, experimentation, projects, testing, research, developments, investigations, certifications or studies, such as: