These piles were driven in a manner similar to the static load test pile and the reaction piles, however, the. The dynamic load pile test, which is a simple quality control test offering a considerable savings of time and cost and requires less space, can be used for predicting pile capacity and pile. Rapid load test on high bearing capacity piles pile dynamics, inc. Pdf dynamic pile load testing experiences in costa rica. Capacities were compared for dynamic tests conducted on the piling from all three datasets. However, load testing can involve uplift or axial tension tests. 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. Therefore, the following test procedure is based on the quick load test method for individual piles. For the field analysis methods, a new procedure to improve the agreement between the pile lengths estimated in the design and finalized in the. The ibc code is the law but is not as popular as using.
The following article provides deep foundation contractors with a load test overview that discusses implementation and the differing methods commonly utilized. Pdf comparison between dynamic and static pile load testing. Comparison of five different methods for determining pile. Established in 1972, pdi continues to innovate, develop, manufacture and supply stateoftheart qaqc testing and monitoring products and software for the deep foundations industry. Pile driving monitoring consists of using a pda to perform real time evaluation of case method capacity, energy transfer, driving stresses and pile integrity for every blow. 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. Different types of pile load test terminologies test pile pile chosen for pile load test only. It can work as a working pile if routine load test is carried out on it is up to half of the safe load. The first collection of load tests compiles results of several smaller load test databases. For dcmc1, the load was applied until continuous vertical displacements occurred between loads of 240 and 250 kn and no increase in load after a load of 250 kn. Federation of piling specialists testing datasheet no 5 pile load testing what each test type should realistically achieve static 1. Table of contents specializing in pile integrity test.
Connect carbon pile to battery using proper battery terminal adapters. Pile load tests as discussed in chapters 5 through 8, the estimation of pile load capacity and settlement under a load is based on the results of field investigations, laboratory testing and the empirical and semiempirical methods. The purpose of pile load testing can be either to prove. Apr 06, 2017 a variety of high and lowstrain load test procedures exist to determine the suitability of pilesoil systems for proposed pile design loads. Plans, specifications, andor provisions prepared by a qualified engineer may provide additional requirements and procedures as needed to satisfy the objectives of a particular test program. Abouzaid department of civil engineering, faculty of engineering, cairo university. Verification of pile load capacity using static pile load test conference paper pdf available december 2016 with 5,197 reads how we measure reads. The other two piles, directly to the left and right of the static load test pile were termed dynamic load test piles.
An old definition of capacity has been the load for which the pile head movement exceeds a certain value, usually 10 % of the diameter of the pile, or a given. Static pile load testing is one of the most common methods for testing the actual insitu capacity of a pile. A number in parentheses indicates the year of last reapproval. Pdf it is a common practice to axially load piles in order to test their loadsettlement or timesettlement performance. The test is carried out to a specified method of applying a static load incrementally to the test pile head and measuring the pile head deflection under the applied load. Implementation of aashto lrfd bridge design specification. Benefits of dynamic pile testing by garland likins, p. One clear limitation is the limited number of tests on deeply embedded, largediameter, highcapacity piles. Federation of piling specialists handbook on pile load testing. This test is performed to confirm the design load calculations and to provide guidelines for setting up the limits of acceptance for routine tests.
Federation of piling specialists handbook on pile load testing 10 foreword this handbook was published in march 2006 by the federation of piling specialists fps to provide guidance on the principles and practical issues that relate to load testing of bearing piles, and thereby to assist informed decisions about testing. S to perform the load tests and to prepare report of test results, as outlined in chapter viii. Also method of testing, maintained test, constant rate penetration test crp. These results do not have static load test results.
A copy of this form is included in appendix f, pile dynamic analysis, static pile load testing and field acceptance criteria, and is available for download. Fdu which is easily evaluated as force times velocity integrated over time. These cases are the caldera grain pier, the moin oil terminal and a bridge over. Test results may also provide information used to assess the distribution of side shear resistance along the pile shaft, the amount of end bearing developed at the pile toe, and the longterm load deflection behavior. Load application the load is applied in the pile in the following sequence. Pdf static load testing of piles megha shyam academia.
The energy delivered to the pile is directly computed as the work done on the pile from the integral of force times incremental displacement. A proof load should not normally exceed 200% of the working load on a pile except in circumstances where special provisions are provided for the testing of precast piles driven to a set. This analysis is generally conducted in the office subsequent to the field testing but can easily be performed on. Generally, pile load tests have capacities that are 10% or less of the prototype capacities.
It is carried with a view to determine ultimate load capacity and the safe load capacity. Major emphasis was given to load test results in which predicted capacity could be compared with capacity measured from a static load test. It should not be less than 4 times the diameter of test pile for straight pile and not less than 2 times the diameter of the bell for belled pile. Fhwahrt05159 june 2006 research, development, and technology turnerfairbank highway research center 6300 georgetown pike mclean, va 221012296. These estimated values should then be confirmed by field pile load tests. All type of pile load test free download as pdf file. Conditions under which pile load tests are conducted generally vary significantly from design loads and field conditions. Static axial load tests compressiontension preproduction load tests 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. Providing a portable system, which meets the astm specifications developed for deep foundation load testing, is essential.
Load test on piles methods of pile load test the constructor. Pile driving analyzer pda for high strain testing pile. To be effective, the integrity testing program should take place as soon as this becomes practical. Pdf the static pile load test on a single pile involve uplift force, axial compression and lateral tests when applied either horizontally or. A pile load test is a direct method of determining the ultimate geotechnical capacity of the pile. Dynamic load testing of large scale piles offshore and onshore. Include analysis performed to determine drill hole diameters, estimated bond lengths, total micropile lengths and type and size of reinforcing steel. Standard test method for highstrain dynamic testing of deep. Static tests are typically performed to a maximum applied load equal to a multiple of the foundations design. High strain dynamic load tests, also called pda tests, assess the capacity of several piles in a single day. Scribd is the worlds largest social reading and publishing site. In order to promote public education and public safety, equal justice for all, a better informed citizenry, the rule of law, world trade and world peace, this legal document is hereby made available on a noncommercial basis, as it is the right of all humans to know and speak the laws that govern them. The present paper discusses dynamic pile load testing dlt experiences in costa rica, specifically the results from three case studies, performed by the authors.
High strain dynamic testing encompasses dynamic pile monitoring and dynamic load testing. The tested pile remains and can be used as a production pile. Methods, setup, load test, drivability, wave equation analysis. Static pile load testing exceeds the standards stated in astm d1143, procedure a. Implementation of aashto lrfd bridge design specification for. The purpose of pile load test and types of test, initial test and routine test. There is no clear trend in the pile performance with. One hydraulic jack 1x400 ton capacity will be provided. Static lateral load testing lateral load testing was performed to meet contract requirements, not often done in practice. Ensuring accuracy in pile load testing is a critical part of pv solar power projects. Standard test method for highstrain dynamic testing of. As identified earlier, the static load test pile was the h directly in the center of the figure. The test procedure involves applying an axial load to the top of the test pile with one or more hydraulic jacks. Were the only company that offers the combination of portable.
Many boxes can be connected to the static load tester at once. Astm d1143 d1143m 0720e1 standard test methods for. The pile load test results are fairly inconsistent scattered. Quick test, for static load testing in compression, and astm d3689 for static load testing in tension. Precontract pile driveability analyses and pile testing programmes including static and or dynamic load testing are often advantageous and allow an economic and safe foundation. Standard test methods for deep foundations under static. In addition, micropile capacity is very sensitive to installation methods. This testing can help you pick up the right pile type that can withstand the strains on the pile during driving and gives cautious if the pile driving reaches its. Jun 30, 2016 requests for static load tests are made to the foundation testing branch on the pile load test plt request form. Code of practice for design and construction of pile foundations, part 4. Maximum compression stresses at the pile top come directly from the measurements. The ultimate bearing capacities of dcm piles dcmc1 and dcmc2 were 200 and 140 kn, respectively. The cost of load testing on individual contracts can vary from zero in many cases to as much as 10% of the value of the piling works.
The proof load or the load to be provided for the abutment piles of bridge 2 was approx. With the carbon pile, load the circuit to the rated output of the alternator and record the positive voltage drop. Pile driving analyzer pda, and developed a fifth method, called the corrected fhwagates. I test pile any pile to which a test loading is, or is to be, applied. Pile load testing, using a proper rigid system, offers project developers the highest level. Initial test on piles are to be carried out at one or more locations depending on the number of piles. Chapter 8 static pile load testing and pile dynamic analysis pile. The test program involves the direct measurement of pile head displacement in response to a physically applied load. Install two or more reaction piles, or anchors, for the reaction frame fig. Pile head load settlement curve the parameters of most value are generally the distribution of soil resistance down the pile shaft and beneath the pile toe, and the computed pile head load settlement curve. Lrfd micropile design and testing for major urban bridges. Axial load test procedures for pile foundations introduction because of the nonavailability of reliable procedures for assessing the load transfer mechanisms between piles and surrounding soil, or for determining the ultimate capacity of piles, fullscale load tests are conducted. New york state, experienced in all aspects of pile load testing and acceptable to the deputy chief engineer structures d. All type of pile load test deep foundation solid mechanics.
The test results may not represent the longterm performance of a deep foundation. Involving pile analysis at an early stage will give you the benefit of our knowledge of piling and pile testing. L working pile one of the piles forming the foundation of a structure. Testing a pile to failure provides valuable information to the design engineer and is recommended for load tests performed prior to the foundation design. If the foundation fails, it must be remediated or the structure demolished and eventually.
For stresswave methods, this means at a typical age of one week. Initial test on piles are to be carried out at one or more locations depending on the number of piles required. 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. The goal of the test was to verify that pile head displacement was similar to the predicted pile head displacement in a free head condition in fb. Pdf verification of pile load capacity using static pile load test. Design and construction of driven pile foundationslessons learned on the central arterytunnel project publication no. The load testing operation is set up and operated by substructure support personal in conjunction with the geotechnical engineer who dictates and monitors the procedures and plots the results of the load tests.
The extra testing costs are more than compensated by reduced foundation costs. This test procedure shall be considered to meet the minimum requirements for load testing. Dynamic load testing with the aid of pile dynamic analyzer pda is a fast and reliable way to evaluate the bearing capacity of the pile. It also gives an idea of the suitability of the piling system. Pdf verification of pile load capacity using static pile. This testing can help you pick up the right pile type that can withstand the strains on the pile during. Pdi, is the largest manufacturer of industrystandard, high quality deep foundation testing solutions, worldwide. Both the compression and tension load tests each take approximately 4 to 8 hours to complete. Test types and methods pile load testing usually involves the application of a direct axial load to a single vertical pile. Pile testing and analysis dynamic load testing, pile.
Standard test method for highstrain dynamic testing of deep foundations1 this standard is issued under the. Apply the load to the pile by jacking against a reaction with one or more hydraulic jacks. Types of static load tests include axial compression astm d1143, axial tension astm d3689, and lateral astm d3966. Step 11 static load testing test loading is the most definitive method of determining load capacity of a pile. Oct 11, 2018 a pile load test is a direct method of determining the ultimate geotechnical capacity of the pile. A case study describes how this new rapid load test was conducted two months later after static pile load testing. Static load testing is the most widely accepted authoritative method. The required pile capacity also depends on the test method for verification of the pile capacity, and the frequency of testing. Astm d 1143, standard load test method for piles under static axial compressive load, american society for testing and materials, philadelphia, pa 2. Once the test is complete, the test frame and reaction piles are removed. The reaction is provided by one of the following methods. Chapter 8 static pile load testing and pile dynamic. Implementation of aashto lrfd design specifications for driven piles state dot lrfd design guidance.
During the test programme our close involvement and. The ultimate pile capacity must exceed the applied loads by a sufficient margin or the foundation will have unacceptable movements, or even fail. Automatic data collection and display allows real time monitoring, analysis, and interpretation of results. Canadian foundation engineering manual, canadian geotechnical society, 1985 3. For a deep foundation to perform satisfactorily, it must have adequate geotechnical capacity to support the applied load and lack structural defects. F proof load a load applied to a selected pile to confirm that it is suitable for the load at the settlement specified. Static load testing applies load incrementally to a deepfoundation element, while measuring foundation movement. K working load the load which the pile is designed to carry. Pile load tests including quickload test method, conventional methods, and interpretations frank m.
1232 989 381 404 739 570 689 1459 1357 1243 96 21 650 399 690 968 28 1279 585 20 430 1477 883 1409 396 338 1339 1497 1190 1074 1049 1315 1008 1037 1215 1076 1294 535 186 484 423