Jun 30, 2016 information in this manual will aid in answering a multitude of questions such as. The static capacity prediction methods used for this project include the spt method meyerhof, 1976, federal highway administration. Administrations design and construction of driven pile foundations fhwanhi05042 and 043. Chapter 8 static pile load testing and pile dynamic analysis. This document is available state, resistance, static analysis methods, dynamic analysis to the public from the sponsoring agency. Increased lrfd axial resistance factors for piling using. Geotechnical engineers have been estimating pile capacity during the design phase of a project based on soil boring data, static analyses of pile capacity, and local experience for many years. Static load tests may be recommended when piles are installed in soils with variable. Each test pile was subjected to three loading cycles with an increasing magnitude of applied load. The osterberg cell for load testing drilled shafts and driven piles 1994. Step 11 static load testing test loading is the most definitive method of determining load capacity of a pile. Codes, specifications and guidelines pertinent to dynamic.
The foundation manual original published by caltrans is intended to provide the field engineer with information that will assist in solving foundation problems and in making engineering decisions although the field engineer is required to make engineering decisions throughout the life of a construction project, none is probably more important than the engineers decision regarding the. Highway administration fhwa subsequently funded a project starting in 1964 for further development of the technology fhwa ref. Blue book and to an approximate average load factor of 1. Generally, load test providers discourage scaled pile testing, because it is a conservative way to eliminate the cons.
Dot prestressed pile details include these piles but the bridge design manual does not provide allowable pile design loads dot square prestressed concrete pile details include these piles but the structures manual does not provide allowable pile design loads load factor 1. Volume ii, fhwanhi16010, addresses static load tests, dynamic testing. Design and construction of driven pile foundationslessons learned on the central arterytunnel project publication no. A second pile served as reaction pile in the static load test and was tested dynamically. This design manual follows the design methodology presented in the federal highway administration s design and construction of driven pile foundations fhwa nhi05042 and. This timber pile design and construction manual has been developed by the southern pressure treater s association as its official recommendation for timber piling design and construction. Two detailed design examples and a generic commentary guideline specification for micropiles is. Fhwahrt05159 june 2006 research, development, and technology turnerfairbank highway research center 6300 georgetown pike mclean, va 221012296. Measured versus predicted shaft resistance of h and closed. Pile driving analyzer pda, and developed a fifth method, called the corrected fhwagates. Recalling the driven pile and drilled shaft foundation construction equipment and construction inspection procedures description static load testing and recalling the basic skills needed to interpret static load test results recalling the basic skills needed in the design and construction of earth retaining structures. Implementation of aashto lrfd bridge design specification. The test pile will be considered failure when a rapid progressive movement of the pile in the direction of loading under a constant load or physical failure of the test pile is observed or a settlement of more than 15% of the diagonal dimension of the pile, which is equivalent to 90 mm. Drivability of pile types to penetration depths and sufficient ultimate capacities 11.
Mar 06, 2018 generally, load test providers discourage scaled pile testing, because it is a conservative way to eliminate the cons. Load test types in the new database include axial static, rapid statnamic, and. As part of a bridge replacement project, a dynamic pile i. A pile is installed by hammering it into the ground using a pile driving hammer.
The efficacy of the fhwa pile design method was explored using data made possible by the 2017 release of fhwa deep foundation load test database dfltd v. The installation procedure for driving piles to capacity was to drive. Fhwa 2006a design and construction of driven pile foundations vol. This database user manual provides an overview of the new deep foundation load test database. Implementation of lrfd geotechnical design for deep foundations using texas cone penetrometer tcp test and final recommendations. This federal highway administration fhwa began the development of the first version of the deep foundation load test database dlftd in the 1980s. Instrumented static load test on rocksocketed micropile. Codes, specifications and guidelines pertinent to dynamic load testing and wave equation analysis september 2015. Federal highway administration rulemaking manual, july 2000 1 1. Administrations design and construction of driven pile foundations fhwahi970. Impact driven, untapered, steel and concrete piles, loaded in compression, using a static load test.
Effect of pile type, pile length, and the pile diameter on the q c q m is explored. Testing a pile to failure provides valuable information to the design engineer and is recommended for load tests performed prior to the foundation design. Code manuals and select published literature pis ridge design manual hapter 20 publication number m 2004 precast prestressed oncrete piles u. Geotechnical load and resistance factor design by mir zaheer, p. Development of lrfd procedures for bridge pile foundations.
Preface this inspectors manual for driven pile foundations provides basic information for the pile inspector about site investigation, pile types, wave equation analysis, test. Fhwasa91042, static testing of deep foundations, provides the following recommendations on when to perform a pile load test. Guidelines for successful high strain dynamic load tests. The information from this fhwa document has been condensed to focus solely on timber. Characteristic pile resistance from profiles of ground test results part 2 of en 1997 includes the following annexes. The contractor must engage the services of a professional engineer licensed and registered in new york state, experienced in all aspects of pile load testing and acceptable to the deputy. Index fhwa deep foundation load test database version 2. The results of this micropile load test, on a pile with high slenderness ratio and high stiffness of surrounding rock, confirmed that most of the applied load was carried by the pile shaft. The design shall conform with applicable provisions of the building code, fhwa micro pile design and construction guidelines, and accepted industry practice. Specification for piling contract documentation and measurement, 1 jan 1988 2526 content tools. Pile load capacity calculation methods 85 case c is referred to as the alternative procedure in the note to en 19971 7.
Typical data required from a conventional static load test are the record of displacement of the pile head and the load applied. Comparison of five different methods for determining pile. Asd, pile length, implementation, limit states, strength limit no restrictions. Information is also provided on inspection and load testing procedures, cost data, and contracting methods to facilitate the safe and costeffective use of micropiles on transportation projects. Now that the lrfd statistical calibration to static pile load tests has been completed by iowa state university isu in 2012 this section of the lrfd bridge design manual has been rewritten to adopt geotechnical and target driving resistance factors from. Standard test methods for deep foundations under static. Foundations manual were published 1985, 1996, and 2006 and chronical the many. Tests that achieve a failure load may help the designer improve the efficiency of the foundation by reducing the piling length, quantity, or size.
The device consists of a smalldiameter steel rod that is. This timber pile design and construction manual has been developed by the american wood preservers institute awpi as its official recommendation for timber piling design and construction. Although the manual reading and recording of dial gauges employed in a static loading test should present no insurmountable difficulty in terms of accuracy and regularity, it. Chapter 8 static pile load testing and pile dynamic. Evaluation of fhwa pile design methods against the. Department of transportation federal highway administration, publication nos. The data in this publication has been prepared in accordance with recognized engineering principles and is based on available technical data. Characteristic pile resistance from profiles of ground test results part 2.
Measured versus predicted shaft resistance of h and. Lrfd micropile design and testing for major urban bridges. The equivalent static load versus pile head axial displacement for the prestressed concrete and composite piles for the three cycles are shown in figure 92. Federal highway a rulemaking manual us department of. In order to use historical load test data, the characterized project site soilrock profile should be similar to the soilrock profile at the load test site. Evaluation of fhwa pile design method against the fhwa. For smaller groups and single piles, less redundancy will be present. Ltc believes that proper engineering analysis can mitigate some of the drawbacks while rationally addressing the differences between. Fhwa sa91042, static testing of deep foundations, provides the following recommendations on when to perform a pile load test. Preface this inspectors manual for driven pile foundations provides basic information for the pile inspector about site investigation, pile types, wave equation analysis, test piles, dynamic and static load tests, pile driving. They generally cannot support as much load as a drilled shaft, so are often grouped under footings when heavy loads need to be supported. Ltc believes that proper engineering analysis can mitigate some of the drawbacks while rationally addressing the differences between a scaleddown test pile and fullscale production pile. All types of foundations are discussed in the manual, along with related problems and possible solutions. Scdot geotechnical design manual geotechnical resistance factors august 2008 9i table of contents.
Load and resistance factor design lrfd for deep foundations. Fhwa nhi05042 design and onstruction of driven pile foundations fhward83059 allowable stresses in piles. Methods, setup, load test, drivability, wave equation analysis. Lad test equipment submit for approval information on the test jack and calibration results. Chapter 8 static pile load testing and pile dynamic analysis pile. Chapter 1, foundation investigations, of this manual explained how. The long anticipated update to fhwa gec 10 drilled shafts. The base of each pile was embedded slightly in a very dense. This manual is an update and revision of fhwahi97021 prepared by goble. Select pile types, ultimate capacities, and pile penetration depths for group sizing. Fhwasa91042, static testing of deep foundations, provides the.
Implementation of lrfd geotechnical design for deep. Timber pile design and construction manual table of contents 1. The use of the pile driving analyzer for installing pile. 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. What action does the engineer take when pile bearing capacity is not obtained at specified tip or reaches refusal 15 feet above tip elevation. This timber pile design and construction manual has been developed by the southern. Design and construction of driven pile foundations idaho. To accomplish this goal, the available data were first analyzed for reliability and then placed in a newly designed relational database management system termed pile load tests pilot, to which this first volume of the final report for project tr573 is dedicated. Over 1,500 load tests were collected and stored for various types of piles and drilled shafts in different soil conditions. Identify most economical pile types from ultimate capacity vs. Design and construction of driven pile foundations. High strain dynamic pile testing hsdpt with the pile driving analyzer pda was first offered by pile dynamics inc. The goal of the test was to verify that pile head displacement was similar.
Users manual for laterally loaded pile analysis program for the microcomputer, com624p version 2. Lrfd micropile design and testing for major urban bridges 1 presented by. Jul 07, 2010 new fhwa drilled shaft manual is done. The estimated pile length necessary to provide the required nominal resistance is determined using static analysis, local pile. This chapter discusses the driven pile and drilled shaft foundation types based on the information in the following primary references. Driven pile design design manual iowa department of. July 7, 2010 robert thompson although i have known for several weeks that the manual was finished i work for one of the authors, after all. Piling can be designed to support modest compressive and lateral loads. Major emphasis was given to load test results in which predicted capacity could be compared with capacity measured from a static load test. Pile load tests are expensive to perform but provide value to a structure.
The design shall conform with applicable provisions of the building code, fhwa micropile design and construction guidelines, and accepted industry practice. A test to verify design assumptions and the adequacy of the contractors installation methods. Recalling the driven pile and drilled shaft foundation construction equipment and construction inspection procedures description static load testing and recalling the basic skills needed to interpret static load test results. The first collection of load tests compiles results of several smaller load test databases. In simple terms, a fhwa document that may require the members of the public to do something, or prohibit them from doing something, is a regulation. Dynamic formulas, namely the fhwa modified gates and the. Apr 24, 2019 the long anticipated update to fhwa gec 10 drilled shafts. Construction procedures and design methods has finally been released by fhwa, the same team that authored the major update in 2010 that shifted design from asd to lrfd also completed this update.