Pile load test 36 2 selection of shear strength parameters 37 4 chapter 4. A description of the fundamentals of dynamic testing, including capwap, is presented in design and construction of driven pile foundations federal highway administration fhwa report no. Review the pile load test report and coordinate with the geotechnical designer and the structure designer to obtain recommendations. In addition, micropile capacity is very sensitive to installation methods. Plate load test is done at site to determine the ultimate bearing capacity of soil and settlement of foundation under the loads for clayey and sandy soils. The dynamic load test results discussed in this report are primarily from the capwap analyses. Ape manufacturing facility located at 7032 south 196th street in kent, washington. This test will be carried out as stipulated in is2911 part iv 1995. Pile load test free download as powerpoint presentation. Jay patel120280106037 naman kantesaria120280106039 udit patel1202801060 applied mechanics departement 2. It will prevent you from ensuring the alternator is not overcharging the battery battery must get to. Issue a change order to implement revised specified tip. An equivalent pile loadhead settlement curve to predict pile capacity has been obtained by using test results from the osterberg cell ocell. Sixty piles were identified, collected, and analyzed.
When analysing the results of static load tests, poulos and. To assess the consequences of a 2% variation of load on a test pile, consideration need only be given to the elastic behaviour of the pile shaft which may easily be around 510 mm at the maximum test load. The load will be applied in increments of 20% of the estimated safe load and at the cut off level. Automatic data collection and display allows real time monitoring, analysis, and interpretation of results. Pile head the pile head shall be chipped off till sound concrete is met wherever applicable.
To calculate safe bearing capacity suitable factor of safety is applied. Generally, to conduct a pile load test, one needs a driven pile, a load usually steel and timber, a hydraulic jack, deflection gauge, and a load indicator. Therefore, the role of the inspector is vital to ensure that the. Table of contents specializing in pile integrity test. Occasionally, a three pile test group two anchor piles and one test pile is used for static load tests in tension refer to appendix f, pile dynamic analysis, static pile load testing and field. The pit test consists of attaching one or two accelerometers to the foundation and using a handheld hammer to impact it. Report analysis axial pile load sistem reaction pile. A fivepile test group four anchor piles and one test pile is used for all static load tests in compression and for most tension tests figure 81. A vertical load test was run on each of four 4 test piles. Select type of pile as cip, h pile, treated timber, precast concrete, etc. Each load test was numbered in the order the test was run, with the pile number and load test number recorded. Many boxes can be connected to the static load tester at once. Worked examples presented at the workshop eurocode 7. Plate load test for calculation of bearing capacity and.
Helical pile load tests mulberry, florida may 4, 2015 page 6 those systems were not available at the time the piles were installed. Instrumentation the basic information to be developed from the pile load test is usually the deflection of the pile butt under the test load. The methodology of pile load test, as per the instructions of the structural consultant is mentioned in the report. During the load test, records including plots of load vs. Load test results a vertical load test was run on each of four 4 test piles. Level the ground surrounding the test pile and put up an 8m length reference beam about. When the concrete compressive strength is not lower than 80% of the design mix strength, the load test can be conducted.
Planning of pile load test setup should starts from the design office. Pdf on jul 23, 2015, ravi sundaram and others published back analysis of pile load test results a case study find, read and cite all the research you need on researchgate. Pile load test hpcl, visakh toyo engineering india ltd. The point of application of the horizontal load should, if possible, simulate inservice conditions. This report presents the results of a study to assess the. So, plate load test is helpful for the selection and design the foundation. Pdf report analysis axial pile load sistem reaction pile. The pitw software postprocesses the data and generates reports, while the pit.
Geotechnical design dublin, 14 june, 20 support to the implementation, harmonization and. Only a flaw that, because of either size or location, may detract from the piles load. Butt diameters should be measured 3 feet from the butt end. Chapter 8 static pile load testing and pile dynamic analysis pile. Test pile report minnesota department of transportation. The load variation will produce a variation of recorded displacement of up to 0. The measured ultimate load carrying capacity for each pile was interpreted from the pile load test using butlerhoy method, which is the primary method used by. In many cases, prior experience combined with adequate subsoil data and sound judgment can preclude the need for pile testing, especially if the pile design load is. Geotechnical report for the ape yard helical pile test program. Analysis and design general 41 41 design criteria 42 1 pile capacity 43 10 settlement 421. Nov 16, 2015 join our host bob as he learns how terracon has developed a better way to conduct pile load tests on solar panel foundations. Pile load tests are expensive and can be quite time consuming.
The load on the jack shall be the same on both the piles. Load test on piles methods of pile load test the constructor. Select type of pile as cip, hpile, treated timber, precast concrete, etc. The pit collects the acceleration data and displays curves that reveal any significant changes in cross section that may exist along the shaft. For consistent interpretation of the displacementtime. Minimum 7 days after casting of the test pile, send concrete test cubes for compression test. Given the soft and compressible marine clays in the boston area, driven pile foundations were selected to support specific structures, including retaining walls, abutments, roadway slabs, transition structures, and ramps. Plate load test to calculate bearing capacity and settlement. Notify the contractor of final specified tip elevations in writing. This test gives us the value of ultimate load value safe load value settlement under. This report describes a field load test that was performed on a sheet pile wall and presents the data that were obtained in the test. High strain dynamic load tests, also called pda tests, assess the capacity of several piles in a single day. A lateral load test was run on each of three of the piles after the vertical load on the pile was completed. The methodology of pile load test, as per the instructions of.
The length of the pile was 20 meter having a diameter of 22. This test gives us the value of ultimate load value safe load value settlement under different values of loads 3. This report has been prepared for the exclusive use of ape. Were the only company that offers the combination of portable. For larger load test exceeding 3000 tonnes, the project team can consider using steel plates, tension piles or ground anchors as the reaction load or adopting other alternative method of testing like bidirectional load test. A case study illustrating static and dynamic load tests on piles installed in alluvial sands demonstrates the design methodology to be followed. Objective this test is used to determine the load carrying capacity of a pile. Two axial pile load tests on dcm piles dcmc1 and dcmc2 and eight axial pile load tests on sdcm piles sdcmc1 to sdcmc8 varying the length and the sectional area of prestressed concrete core pile as listed in table 2. Pdf osterberg test as an alternative pile testing method. General the compression test using either the reaction frame or kentledge system is undertaken on a test pile concurrent with the construction of the main piling works or for a preliminary pile outside the site. Interpretation of static pile loading test results and application for.
Of course, not all flaws are detrimental to the performance of the pile. Analysis of the dynamic and static testing results confirmed that the installation of the reaction piles adversely affected the bearing layer resulting in. Join our host bob as he learns how terracon has developed a better way to conduct pile load tests on solar panel foundations. This test was initiated by the us army engineer division, lower mississippi valley lmvd, in a letter to us army engineer district, new orleans nod, dated 29 oct 84. Strainstall bidirectional static load test bdslt youtube. S to perform the load tests and to prepare report of test results. Pdf back analysis of pile load test results a case study. Load tests shall be performed to verify the suitability and capacity of the proposed helical anchor pile, and the proposed installation procedures prior to installation of production helical anchorspiles. Federation of piling specialists handbook on pile load testing. A report will be prepared on the test analysing the test results and bringing out the conclusion. The load displacement and time will be recorded sequentially in a tabular form along with information about the test pile.
For small projects the cost of pile testing can represent a considerable portion of the overall foundation cost. The maximum test load to be applied must be agreed in advance so that the test pile, pile cap if required and the load testing equipment reaction pileskentledge hydraulic ram and pumpbidirectional load cellrapid or dynamic test energy can all be designed or chosen so as to apply the maximum test load safely. The jack should be placed horizontally, between two piles. The reinforcement shall be cut and head levelled with plaster of paris. Capwap analysis is made on the pda data after the test is complete. For drilled shafts or micropiles, locate these support piles not less than 10 ft. Test results and evaluation a test load of 3 times the anticipated safe working load swl was to be applied on this pile the load was planned to be applied in 3 cycles, the first cycle was planned up to 1 x swl.
Pdf report analysis axial pile load sistem reaction. Pile driving analyzer pda for high strain testing pile. Chapter 8 static pile load testing and pile dynamic analysis. Pile driving analyzer systems also evaluate shaft integrity, driving stresses, and hammer energy. Pit pile integrity tester for low strain testing pile. The gauges should be placed to measure the following.
A load displacement curve will form an essential part of the presentation. The locations of the test piles are shown in figure 1. In general two types of pile load tests are conducted. Pile compression load test by kentledge system or reaction frame system i. Pdf on jul 23, 2015, ravi sundaram and others published back analysis of pile load test results a case study find, read and cite all the. Strainstalls bidirectional static load test bdslt is a truly innovative and highly effective static load testing technique. Therefore, we have to face the fact that on any given site some piles may exhibit flaws.
Jun 30, 2016 a five pile test group four anchor piles and one test pile is used for all static load tests in compression and for most tension tests figure 81. All pile load test results were analyzed using the six different interpretation methods mentioned above 0 4 8 12 16 20 0 50 100 150 200 250 300 350 400 450 500 550 load, q ton settlement, s mm pile no. A search in the dotd files was conducted to identify pile load test reports with cone penetration soundings adjacent to test piles. S to perform the load tests and to prepare report of test results, as outlined in chapter viii. The best results occur when pile load tests are performed in conjunction with pile dynamic analysis pda. Static load testing is the most widely accepted authoritative method. Load test the battery to know if it is reliable if the battery is not fully charged. The pile driving analyzer pda system is the most widely employed system for dynamic load testing and pile driving monitoring in the world.
An additional four static axial load tests and dynamic tests. In initial test, the test load 52 times the working load in work test load is 32 times the design load. This test will be carried out as stipulated in is2911 part iv. The maximum test load or test pressure expressed as a reading on the gauge in use shall be displayed and all operators shall be made aware of this limit. The initial test is performed before the start of construction to assess the design adequacy. A description of the fundamentals of dynamic testing, including. Load test on working pile was initiated on 25th july 20 at 20.
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