The transient dynamic response tdr test is based on measuring the frequency and amplitude response of a pile, known as impulse. If major defects exist, test results may be interpreted to estimate their magnitude and location. In the low strain impact integrity testing, the response of the pile to an impact on the head of the pile shaft is. Testing procedure this testing requires the attachment of the highly sensitive accelerometer to the pile top with viscous material. The methods are low strain pile integrity testing, multichannel pile integrity testing and testing with a shaker system. The low strain pile integrity test lspit is currently the most widely used method of pile integrity testing.
Pile integrity testing pit introduction defects in concrete piles caused either during or after construction may seriously affect their performance in service. Low strain pile integrity testing lspit, due to its simplicity and low cost. Test results may also be used to estimate pile length. It may be used on most concrete or wood foundations. Standard test method for low strain impact integrity testing. Pile dynamic analysis pda dynamic load testing pda is a method to assess a piles bearing capacity by applying a dynamic load to the pile head a falling mass while recording acceleration and strain on the pile head. Pile integrity testing using lowstrain tests such as the tdr transient dynamic response method, is a rapid way of assessing the continuity and integrity of concrete piled foundations. Sonic integrity testing is a widely used method for testing the quality of concrete piles in a nondestructive way before they are incorporated in the final foundation plan. Wireless pile integrity tester fprimec ipile is an innovative wireless pile integrity testing instrument for low strain testing of deep foundations and piles. With this information, we can then arrive at a rational decision. Test method for low strain integrity testing of piles testing precedure of measurements and analyses slp d. For stresswave methods, this means at a typical age of one week. From the numerical calculation results and test signals, a location of two thirds of radius. Method and testing procedure is standardized with astm d588200 standard test method for lowstrain integrity testing of piles.
Pile integrity test can be used for forensic evaluations on existing piles or quality assurance in the new construction. Foundation monitoring pile integrity testing geotechnical. Disregard the flaw and accept the pile asis accept the pile as a partial support and strengthen the superstructure repair the defective pile reject the defective pile altogether, and adopt proper remedial measures. Standard test method for low strain impact integrity testing of deep foundations. Dynamic load testing is a high strain dynamic test which can be applied after pile installation for concrete piles. T its a non destructive testing of deep foundations like driven piles,augered or bored piles. This is because the possible structural defects from pile installation such as cracks, changes in crosssections and the like can be detected by the use of this method.
Since the low strain pile integrity testing is wellestablished and standardized method, the results from it are used as a reference for other two methods. This method provides information about continuity, defects such as cracks, necking, soil incursions, changes in cross section and approximate pile lengths unless the pile is very long or. To be effective, the integrity testing program should take place as soon as this becomes practical. The integrity test is an essential part of quality control in either castinplace or precast concrete. In normal conditions we can easily test up to 60 piles per day, increasing to 200 where access is particularly good. Pile integrity testing james fisher testing services. Report 73241 test report v 0012 v applicant reference egetaepper as mrs. A pile profile can also be developed, illustrating multiple piles in one. Pile integrity testing pit is a lowstrain and nondestructive integrity test method which only involves the impact from a small handheld hammer. Pile integrity test pit, or low strain impact integrity testing of deep foundation is a widely used nondestructive test method for the evaluation of pile quality, and integrity. Aug 15, 2017 pile integrity test pit, or as astm d5882 refers to it as low strain impact integrity test, is a common nondestructive test method for the evaluation of pile integrity andor pile length. Standard test method for low strain impact integrity testing of deep foundations and afnor p1602,4 standard for pile integrity testing as well as additional standards. Piles that are doubtful for integrity are taken up for dynamic load testing along with some piles which are ok.
Pile name date collected pile lengthas reported on site wave speeddefined from reported pile length. Sonic integrity testing sit of concrete piles geonoise. Pile integrity testing pit is a nondestructive integrity test method for foundation piles. Pile integrity testing and analysis pile dynamics, inc. Foundation monitoring pile integrity testing geotechnical consulting services pile integrity testing pit is a lowstrain and nondestructive integrity test method which only involves the impact from a small handheld hammer. The pit performs wave equationbased nondestructive foundation investigations known as low strain impact integrity tests or low strain dynamic tests. Pile integrity test pile integrity test low strain impact.
Integrity testing of concrete piles for proper functioning. The pit test, sometimes referred to as the sit, tno, sonic integrity test, acoustic integrity test, tdr time domain reflectometry or pulse echo test, is a nondestructive method to evaluate a pile foundation element in order to confirm its integrity. Pile integrity testing infrastructure studies geoview tampa. Test method this test is performed with a pile integrity tester, an accelerometer placed on top of the pile to be tested, and a hand held hammer. The profound sitseries meets the constructions industrys demand for professional sonic integrity testing of concrete piles. This test method will not give information regarding the pile bearing capacity. The pit may also be used to test piles integral in the structure, such as those supporting existing bridges or towers, and may assess their length.
The test detects potentially dangerous defects such as major cracks, necking, soil inclusions or voids and, in some situations, can determine unknown lengths of piles that support existing buildings. Pile integrity results are presented on table and graph. Low strain impact integrity testing is a nondestructive pile testing method for integrity assessments of augered castinplace piles, drilled shafts or driven concrete or timber piles. These data assist evaluation of pile integrity and pile physical dimensions that is, crosssectional area, length, continuity, and consistency of the pile material, although evaluation is approximate and not exact. With this test, necking or bulging and uniformity of quality of concrete is checked. Towards intelligent interpretation of low strain pile integrity testing. This can be achieved with an integritytesting program to be specified together with the specification for pile construction ice 1996. Analytic solution for onedimensional propagation of waves and its adaptation to results interpretation of pile integrity test pit. Improvement and shortage of low strain pile integrity test1. The pet device can connect to your mswindows portable pc or with the bluetooth version to your android smartphone or tablet.
Pdf the proposed modelling procedure provides a new methodology, which identifies the low strain integrity test limitations through quantifying soil. Integrity testing of concrete piles piles integrity testing is quick and simple method and it enables number of piles to be tested in a single working day. Table of contents specializing in pile integrity test. The pit test, sometimes referred to as the sit, tno, sonic integrity test, acoustic integrity test, tdr time domain reflectometry or pulse echo test, is a nondestructive method to. Pdf free download book ciria ground engineering report pdf ebook. A pile integrity test is defined as a nondestructive test ndt which examines the response of a pile to some form of indirect physical scanning technique. Once the pile wave analysis is completed, the full report will present the predicted static loadsettlement behaviour and the pile capacity distribution among the pile. Table of contents specializing in pile integrity test equipment. Pile integrity testing services pit csl seir pda tssa.
Low strain integrity testing pit testing grl engineers, inc. Description of method low strain integrity testing may be applied to any concreted pile e. Pdf pet pile echo tester, for testing pile integrity. Pile integrity testing, also known as sonic echo testing and low strain dynamic testing is used to determine the length and integrity of deep foundations and driven piles. It is a low strain method for integrity testing of driven piles, drilled shafts etc.
This paper studied stress wave propagation in piles in engineering tests with finite element method fem. Other than determination of pile capacity, the behaviour during the pile installation works, such as the pile integrity, driving stresses and the energy transmitted to the pile. Prestressed concrete piles, drilled shafts, auger cast piles, concrete filled pipe piles. The method works well in concrete or timber foundations that are not excessively slender. Teco pile integrity test system hardware and software specification page 1 of 2 civil engineering instrumentation testconsult limited tel. The system measures the velocity response of a pile to a force input generated by a small hammer. Transient response frequency domain analysis procedure. The paper presents typical examples of pile integrity testing and the results analysis, whereby the testing methodology relies on existing astm standards, as well as on the testing methodology. Some observations and experience with pile integrity testing at various projects for essar 689 6. Standard test method for integrity testing of concrete deep foundations by ultrasonic crosshole testing.
For each pile tested, the averaged, amplified velocity versus time record shall be included in the report, with a table summarizing results and conclusions. It analyzes records in the time domain and outputs user customized tables, plots and reports. Nondestructive integrity testing of piles ndt guidelines. Pile integrity test is used to assess the continuity of piles. Pile integrity test applications and limitations youtube. With the pit, any form of the test is performed fast, potentially making it possible to test every pile on. Particular attention will be given to the testing of existing foundations. The pile integrity tester pit gives peace of mind that a pile or shaft is free of major cracks and voids, prior to construction of the superstructure. Test method for low strain integrity testing of piles. Federation of piling specialists handbook on pile load testing. Integrity test, acoustic integrity test, tdr time domain reflectometry or pulse echo test, is a nondestructive method to evaluate a pile foundation element in order to confirm its integrity. A pile is a slender element cast in the ground or driven into it. Observations at paradeep site at the start of the job, essar constructions did not have any integrity instrument at paradeep and hence, qaqc was mostly in the form of pile load test vertical and lateral. T is also called sonic testing,pulse echo or transit response in some situation it can also be used.
These test may be performed by the pulse or sonic echo or transient response methods. General this method statement covers the requirement and procedure for pile integrity 2. The testing cost has been substantially reduced and, as a result, the methods are now widely employed. Pile quality is often determined by performing a low strain integrity test directly after pile driving or within days after installation of castinsitu piles. Annexc examplesofdynamicpile load testing andintegrity testing.