The platform will rest over steel crib sleeper cribs sand bag supports clear of the test pile. Bidirectional static load testing state of the art m. Kentledge with surcharge load or anchor pile method. Static load tests can be used to determine the settlement that can occur at working load, or a multiple of it, and can also be used. The reinforcement shall be cut and head levelled with plaster of paris. This method statement will cover the full pile static load test procedure as detailed in the following test stages.
The gauges should be placed to measure the following. Method statement of load test using osterberg cell ocell, ohayo gozaimasu. Pdf verification of pile load capacity using static pile load test. It differs from the statnamic load test and dynamic load testing in that the pressure applied to the pile is slower. Download scientific diagram the typical compression pile load test setup by kentledge dead weight method. Pile head the pile head shall be chipped off till sound concrete is met wherever applicable. This test is performed to confirm the design load calculations and to provide guidelines for setting up the limits of acceptance for routine tests. The number of tests may be increased to 2% depending on the nature type of structure. Design of pile foundation using pile load test eurocode 7. It has been more than 2 week i not update my blog for the construction field post. Pile load test the procedure for the pile load test shall be as follows.
For the purposes of verification the design axial capacity and the static load settlement behavior of piles, the static pile load test has long been considered as the most reliable method but. Arrangement for carrying kentledge directly on the pile head. Sep 01, 2012 a variety of test procedures and method have been developed for carrying pile load, amongst the most common procedure for pile load test is by using kentledge method where a static load is apply direction to the pile with the required surplus. 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. Federation of piling specialists handbook on pile load testing. For static load test, kentledge reaction syst em was used.
Static load testing is an in situ type of load testing used in geotechnical investigation to determine the bearing capacity of deep foundations prior to the construction of a building. This method involves the construction of a platform upon which massive weights are placed. On construction sites, prior to the erection of a building, static load testing may. Plate load test geotechnical how to do plate load testing,st kaise kare, plate loa duration. Analysis dynamic analysis load test on pile penetration tests load test on pile. A pile load test consists of applying increments of static load to a test pile and measuring. The ocell test is a full scale static loading test, just two running simultaneously, which measure directly the upward upper skin. As per previously articles i have mentioned about load test for pile by using kentledge system method and reaction pile method. Dynamic load test or pda test has become a common pile test procedure for. A bearing plate with a hole shall be placed on the head for the jack to rest. Pdf the static pile load test on a single pile involve uplift force, axial compression and lateral tests when.
Pdf in recent decade, dynamic load test is increasingly being used for. I am plannning to coduct a pile load test, what is the suitable method. Testing a pile to failure provides valuable information to the design engineer and is recommended for load tests performed prior to the foundation design. For high capacity piling tests, much heavy manual effort is saved by providing. Currently with the advance technology and competitive in. A simple approach was developed for the prediction of such stresses to make better. 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. A trio of methods are commonly used when applying loads to test piles.
Jun 20, 2012 pile load test hpcl, visakh toyo engineering india ltd. Dynamic and static pile load test data this chapter presents the methodology and results of dynamic and static pile load test data for the selected contracts. The arrangement of kentledge, piles, anchors or rafts that provides a resistance. A variety of test procedures and method have been developed for carrying pile load, amongst the most common procedure for pile load test is by using kentledge method where a static load is apply direction to the pile with the required surplus. It involves the direct measurement of pile head displacement in response to a. It is the most fundamental form of pile load test and is considered as the benchmark of pile performance. A bidirectional static load test bdslt differs from its conventional counterpart kentledge static load test predominantly from the application method of the applied test load schmertmann et al, 1998. The typical compression pile load test setup by kentledge dead. The methodology of pile load test, as per the instructions of the structural consultant is mentioned in the report. They are used within ships as permanent, highdensity ballast. Currently with the advance technology and competitive in construction in term of costing and time impact, i would like to share my experience with another method of load test by using bidirection static load test. Check the quality of pile construction proof load test.
Duong do a frame is assembled over the pile to be tested on top of which an amount of weight a minimum 110 to 120% of maximum test load is safely stacked. Step 11 static load testing test loading is the most definitive method of determining load capacity of a pile. Method statement for pile load test by kentledge method. High strain static load testing is a method of testing deep foundations to obtain information about their capacity andor to monitor their installation. Similar results were obtained for torquedriven helical piles in cohesive soils 11. Mr chua tong seng dr yet nai song mr heng kok hui geoss bca aces hdb ies lta mom scal bauer m singapore csc holdings limited resource piling pte ltd zap piling pte ltd. Static pile load test kentledge method geotechnical master. Jacking against reaction piles is the most economical method, with the load in these piles limited to 25 to 50 percent of the test pile s load. During ultimate test pile stage, a few 4,000 ton kentledge load test were conducted, using steel mat to support the 4,000 ton kentledge. Objective this test is used to determine the load carrying capacity of a pile. Some good pile load testing practices, f or instance, testing by remote control where workers do not need to go under the massive kentledge setup to increase the test load and to take load test readings can be considered. Design and construction of driven pile foundations lessons learned on the central arterytunnel project chapter 4.
One load test was undertaken on a belled pile end bearing in glacial clay till and a second load test on a straight pile socketed in weak clay shale bedrock. Reaction kentledge shall be suitably designed to get the desired reaction on the piles. A kentledge using concrete blocks is one of the most common method of doing a load test in singapore. What are the advantages and disadvantages in using anchor method for vertical pile load tes. Mar 28, 2017 vertical pile load test by static method. Static load test slt is the most reliable method of determining pile load capacity. It also gives an idea of the suitability of the piling system. Comply with guide lines on good practices for pile load test using kentledge method in singapore issue by geoss on 01092011 4. Pile compression load test by kentledge system or reaction frame system i. The initial test is performed before the start of construction to assess the design adequacy. Reaction pile method why conduct load test on foundation pile1.
Bca and mom will like to urge all the stakeholders of the construction industry to adopt the guidelines for pile load test carried out using kentledge method. Hoy, texas highway department this paper covers the general principles of pile load testing, including objectives of pile testing, importance of planning, various types and methods. In general two types of pile load tests are conducted. Pile load tests including quick load test method, conventional methods, and interpretations frank m.
A pile driving analyser pda is used to record, process and display data and results. This generally takes the form of concrete blocks of regular dimensions and weight although steel ingots can be used provided that their weight static pile load test kentledge method read more. Is there any techncial concern on using anchor method than sucharge load methos. Dead load kentledge a structure over the test pile ground. Bored piles construction method will vary depending on the type of soil that will make a difference in. Kentledge base, height to width aspects ratio of the kentledge setup, site supervision by competent staff, instrumentation and monitoring of the kentledge setup. Chew talk on geoss seminar on rapid pile load test oct 2014. In initial test, the test load 52 times the working load in work test load is 32 times the design load. 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 piles kentledge 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.
Load tests on piles are conducted on completion of 28 days after casting of piles. Load test on piles methods of pile load test the constructor. 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. A range of different size ocells now exist, with capacities from 0. Geoss guidelines on good practices for pile load test. Ordinary static pile load tests using kentledge or reaction piles are. Comply with guide lines on good practices for pile load test using kentledge method in. Vertical load testing of piles in accordance with is 2911 part iv including installation of loading platform by kentledge method and preparation of pile head or.
Static load testing is an in situ type of load testing used in geotechnical investigation to. Axial compression pile load testing mechanism kentledge system as per astm d1143 was employed to apply compression pile load test using concrete blocks the arrangement of loading system was capable of performing static pile load test up to 3000tons. In a maintained load test movement of the pile head shall be measured by two of the. The purpose of the load test is basically to prove that the security level of a structure or part of the structure meets the requirements of existing building regulations, with the aim of ensuring. For drilled shafts or micropiles, locate these support piles not less than 10 ft.
On 16 jan 2011, during a pile load test at a construction worksite, a structural frame supporting the kentledge structure sunk into the ground causing the concrete blocks to topple and fall. Comparison of static and dynamic load test of pile. Risk assessments on the execution of the pile load test should address the. Pdf comparison of static and dynamic load test of pile. Jay patel120280106037 naman kantesaria120280106039 udit patel1202801060 applied mechanics departement 2. Kentledge load test in machine load test a kentledge refers concrete weights used in load testing. Pile capacity predictions using static and dynamic load testing. Testconsult foundation and pile testing testconsults static load testing is the most fundamental form of pile load test and is considered the benchmark of pile performance. Rapid load test from theory to practice in singapore dr s h chew nus 4 traditional pile load test static maintained load test using kentledge blocks or steel plates more recently, in malaysia and singapore, due to.
Load tests are performed onsite on test piles to verify the design capacity of the piles. The kentledge will consist of concrete blocks stacked over a platform built up of rolled steel beams and plates resting over them. Pile load test hpcl, visakh toyo engineering india ltd. Evaluation report on pile load test authorstream presentation. Vertical load testing of piles in accordance with is 2911 part iv including installation of loading platform by kentledge method and preparation of pile head or construction of test cap and dismantling of test cap after test etc. Instead of the test load being applied from above the test pile by means of a hydraulic jack and. This test gives us the value of ultimate load value safe load value settlement under different values of loads 3. Pile load test is the most reliable method of estimating the load carrying capacity of a pile, but it is rather expensive. Comparison between dynamic and static pile load testing. The length of the pile was 20 meter having a diameter of 22. Initial test on piles are to be carried out at one or more locations depending on the number of piles. The kentledge method is a static load test for piles where a frame is assembled over the pile to be tested, on top of which an amount of weight concrete blocks in most cases is safely stacked. Load test on working pile was initiated on 25th july 20 at 20. To ensure that these piles have sufficient capacity they are tested using load tests.
By using multiple ocells on a single plane, the available test load can be increased to more than 235 mn. England bsc msc phd mic loadtest, 14 scotts avenue, sunbury, tw16 7hz, uk. They may also be used as counterweights in cranes such as tower cranes or swing bridges as is found in the victoria swing bridge. It involves the direct measurement of pile head displacement in response to a physically applied test load. The total weight of the kentledge shall be greater than the required test load and shall be placed on a platform supported well clear of the test pile. The benefit of the slow test methods lies in the additional soil pile behaviour information, occasionally obtained, which the interpreting engineer can. Pdf comparison between dynamic and static pile load testing. Pile load tests including quickload test method, conventional methods, and interpretations frank m.
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