Download or read book Analysis of Pile Capacity Design Using Cone Penetrometer Data Through Case Studies written by Chad Lloyd Held and published by . This book was released on 2002 with total page 1108 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Comparison of Measured Pile Capacity to Pile Capacity Predictions Made Using Electronic Cone Penetration Data written by Ronald L. Richman and published by . This book was released on 1989 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of Bearing Capacity of Piles from Cone Penetration Test Data written by Hani H. Titi and published by . This book was released on 1999 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study presents an evaluation of the performance of eight cone penetration test (CPT) methods in predicting the ultimate load carrying capacity of square precast prestressed concrete (PPC) piles driven into Louisiana soils. Sixty piles were identified, collected, and analyzed. The following methods were used to predict the load carrying capacity of the collected piles using the CPT data: Schmertmann, Bustamante and Gianeselli (LCPC/LCP), de Ruiter and Beringen, Tumay and Fakhroo, Price and Wardle, Philipponnat, Aoki and De Alencar, and the penpile method. The ultimate load carrying capacity for each pile was also predicted using the static method, which is used by the Louisiana Department of Transportation and Development for pile design and analysis.

Download or read book Pile Design and Construction Rules of Thumb written by Ruwan Abey Rajapakse and published by Elsevier. This book was released on 2011-08-30 with total page 455 pages. Available in PDF, EPUB and Kindle. Book excerpt: All objects and structures transfer their load either directly or indirectly to the earth. The capacity of the earth to support such loads depends on the strength and stability of the supporting soil or rock materials. Pile foundations are the part of a structure used to carry and transfer the load of the structure to the bearing ground located at some depth below ground surface. There are many texts on pile foundations. Generally, these books are complicated and difficult to understand. Easy to use and understand, this book covers virtually every subject concerning pile design, featuring techniques that do not appear in other books on the subject. The book contains design methods with real life examples on pin piles, bater piles, concrete piles, steel piles, timber piles, auger cast piles, underpinning design, seismic pile design, negative skin friction and design of Bitumen coated piles for negative skin friction and many other subjects. The book is packed with design examples, case studies and after construction scenarios are presented for the reader's benefits. This book enables the reader to come away with a complete and comprehensive understanding of the issues related to the design, installation and construction of piles. Handy guide for engineers perparing for professional engineer (PE) exam Numerous design examples for sandy soils, clay soils, and seismic loadings Methodologies and case studies for different pile types

Download or read book Bearing Capacity of Piles from Cone Penetration Test Data written by and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Theory and Practice of Pile Foundations written by Wei Dong Guo and published by CRC Press. This book was released on 2012-11-14 with total page 579 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pile Foundations are an essential basis for many structures. It is vital that they be designed with the utmost reliability, because the cost of failure is potentially huge. Covering a whole range of design issues relating to pile design, this book presents economical and efficient design solutions and demonstrates them using real world examples. Coverage includes nonlinear response of single piles to vertical or torsional loading and to cyclic lateral loading, as well as prediction of nonlinear response of lateral pile groups, vertically loaded pile groups and the design of slope stabilising piles. Most solutions are provided as closed-form expressions. Theory and Practice of Pile Foundations is: illustrated with case studies accompanied by practical applications in Excel and MathCad the first book to incorporate nonlinear interaction into pile design. A valuable resource for students of geotechnical engineering taking courses in foundations and a vital tool for engineers designing pile foundations.

Download or read book Determination of Pile Capacity in Soft Cohesive Soils Using Electronic Cone Penetrometer written by Manouchehr Dakhroo and published by . This book was released on 1981 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract.

Download or read book Analysis Prediction of Pile Capacity Using the Cone Penetration Test written by William M. Corson and published by . This book was released on 1989 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt: This theses will evaluate the accuracy of the electrical and mechanical cone penetration test for predicting pile capacity when compared to observed pile capacity results from nearby pile load tests. The research was accomplished by finding former construction sites which had pile load test, electrical cone penetration test, mechanical cone penetration test, and boring log data all located within a close proximity of one another. Pile capacities were predicted using the electrical and mechanical cone penetration test sounding data. Then the predicted pile capacities were compared to the observed pile capacity determined by nearby pile load tests. As a natural consequence of performing the latter analysis, comparisons could also be made between the results of electrical and mechanical cone penetration tests at a given site. Soil layer divisions along with the average friction ratio and end bearing resistance measurements in each layer were identified and compared from electrical and mechanical cone penetration test sounding data. Computer programs, designated MCPTUFR and PLAID, were developed to predict pile capacity using conventional methods from mechanical and electrical cone penetration tests respectively. Theses. (jhd).

Download or read book Use of Pile Driving Analysis for Assessment of Axial Load Capacity of Piles written by Rodrigo Salgado and published by Purdue University Press. This book was released on 2012-12-01 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Driven piles are commonly used in foundation engineering. Pile driving formulae, which directly relate the pile set per blow to the capacity of the pile, are commonly used to decide whether an installed pile will have the designed capacity. However, existing formulae have been proposed based on empirical observations and have not been validated scientifically, so some might over-predict pile capacity, while others may be too conservative. In this report, a more advanced and realistic model developed at Purdue University for dynamic pile driving analysis was used to develop more accurate pile driving formulae. These formulae are derived for piles installed in typical soil profiles: a floating pile in sand, an end-bearing pile in sand, a floating pile in clay, an end-bearing pile in clay and a pile crossing a normally consolidated clay layer and resting on a dense sand layer. The proposed driving formulae are validated through well documented case histories of driven piles. Comparison of the predictions from the proposed formulae with the results from static load tests, dynamic load tests and conventional formulae show that they produce reasonably accurate predictions of pile capacity based on pile set observations.

Download or read book Determination of P y Curves by Direct Use of Cone Penetration Test CPT Data written by SHAWN SHAHRIAR ARIANNIA and published by . This book was released on 2015 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: The current best practice in geotechnical engineering in determining lateral capacity of piles is to replace the soil reaction with a series of independent springs. Basically, the model uses beam theory to represent the pile and uncoupled, non-linear load transfer functions, called p-y curves to represent the soil. Most of the existing methods for determining p-y curves are highly empirical, based on a limited number of cases of laterally loaded piles, which were instrumented, enabling to measure the pile deflection in discrete depth intervals subject to different lateral load (i.e. Matlock 1970, Reese 1975). In essence, these methods have their own limitations, and are mainly applicable for the conditions similar to the tested conditions. Although later, more detailed investigations by different people addressed some of the problems, still the basis of the existing design programs such as LPILE, or procedures introduced in applicable codes such as API (American Petroleum Institute), is the same original recommendations made by Matlock and Reese during seventies. In recent era, demand in employment of in-situ direct-pushed based methods using multi-measurement in-situ devices, such as the seismic cone penetration test with pore water measurement (SCPTu) and Seismic Flat Dilatometer Test (SDMT) is significantly increased. The main objective of this research is to introduce a unified CPT-based approach for determining p-y curves and pile responses to lateral loads. The suggested approach will provide explicit and defined steps/criteria to develop p-y curves for piles subjected to lateral loads using CPT data. CPT data will be used to determine soil strength parameters. Recent developments in relating CPT data to soil basic parameters using Critical State Soil Mechanics (CSSM) framework will be implemented in the suggested model. In all current common models, pre-determination of the soil behavior and the model to be used (e.g. Matlock clay, 1970 or Reese sand, 1975), will become warranted even before commencement of the analysis. On the contrary, in the proposed model, the need for the said pre-determination of soil behavior is eliminated. As discussed in Section 2.3.5, soil behavior in the model is being classified into four broad and general groups: drained-dilative, drained- contractive, undrained-dilative and undrained-contractive The main factor driving the suggested analytical approach is Soil Behavior Type Index, Ic. In the proposed approach, the SBT index, Ic, will be used to determine the in-situ characteristics and behavior of the soil. Based on the value of Ic calculated from CPT data, it could be determined that the soil behaves as a sand-like or a clay-like soil, and during the shearing would behave in undrained or drained condition. The measured shear wave velocity during field test using seismic cone penetration test or other methods such as SASW (Spectral Analysis of Surface Waves) or Cross-Hole logging, may be used to determine the small strain shear modulus, G0, which corresponds to the initial stiffness of the linear part of the p-y curve. In this research, the proposed model will be verified using collected case histories of laterally loaded piles with available CPT data at the same site. The p-y curves, and pile force-head displacements determined from the model will be compared to the field-resulted p-y curves and pile head displacement measurements available from the case histories.

Download or read book Pile Driving Analysis for Pile Design and Quality Assurance written by Rodrigo Salgado and published by . This book was released on 2018-02 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Driven piles are commonly used in foundation engineering. The most accurate measurement of pile capacity is achieved from measurements made during static load tests. Static load tests, however, may be too expensive for certain projects. In these cases, indirect estimates of the pile capacity can be made through dynamic measurements. These estimates can be performed either through pile driving formulae or through analytical methods, such as the Case method.Pile driving formulae, which relate the pile set per blow to the capacity of the pile, are frequently used to determine whether the pile has achieved its design capacity. However, existing formulae have numerous shortcomings. These formulae are based on empirical observations and lack scientific validation. This report details the development of more accurate and reliable pile driving formulae developed from advanced one-dimensional FE simulations. These formulae are derived for piles installed in five typical soil profiles: a floating pile in sand, an end¿bearing pile in sand, a floating pile in clay, an end¿bearing pile in clay and a pile crossing a normally consolidated clay layer and resting on a dense sand layer. The proposed driving formulae are validated through well-documented case histories of full-scale instrumented driven piles. The proposed formulae are more accurate and reliable on average than other existing methods for the case histories considered in this study.This report also discusses the development of a pile driving control system, a fully integrated system developed by Purdue that can be used to collect, process, and analyze data to estimate the capacities of piles using the Case method and the pile driving formulae developed at Purdue.

Download or read book Pile Foundation and Design written by H. G. Poulos and published by John Wiley & Sons. This book was released on 1980-07-08 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides methods of analysis of pile formation that may be useful in design. Presents: a consistent theoretical approach to the prediction of pile deformation and load capacity; parametric solutions for a wide range of cases; demonstrations of how such solutions can be used for design purposes; a review of the applicability of these approaches to practical problems.

Download or read book Analysis of Piezocone Data for Displacement Pile Design written by James A. Schneider and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to the similarity between the geometry and full displacement installation method of a cone penetrometer and displacement pile, the axial capacity of displacement piles is often assessed using data from a cone penetration test (CPT). As there are many more factors influencing pile axial capacity than affecting CPT cone resistance, there are a wide range of CPT-based empirical design methods in use. These methods have various levels of predictive success, which usually depends upon the soil conditions, pile geometry, pile installation method, and time between installations and loading. An improved understanding of the basis and reliability of respective design methods is essential to improve the quality of predictions in the absence of site specific load test data. This thesis explores the influence of soil state and drainage conditions on piezocone penetration test (CPTU) tip resistance (qc) and penetration pore pressures (u2). For cone penetration testing identified as 'drained', factors influencing the correlation between cone tip resistance and displacement pile shaft friction in sand are investigated through (i) a review of previous research and the performance of existing design methods; (ii) centrifuge studies of piles of differing widths with measurements of local lateral stress; (iii) field tension tests at different times between installation and loading for uninstrumented driven piles with different diameters and end conditions; and (iv) field tension tests at different times between installation and loading on closed ended strain gauged jacked segmented model piles with different installation sequences. CPTU qc and u2 are primarily controlled by soil state and drainage conditions, with effective stress strength parameters and soil stiffness also influencing the measurements. The primary mechanisms identified to control the correlation between cone tip resistance and shaft friction on displacement piles are identified as; (i) the initial increase in radial stress due to soil displaced during installation of a pile; (ii) different levels of soil displacement induced by open, closed, and partially plugged piles; (iii) reduction in radial stress behind the pile tip; (iv) additional reduction in radial stress with continued pile penetration (friction fatigue); (v) changes in radial stress during loading; (vi) constant volume interface friction angle between soil and steel; and (vii) changes in the effects of the above mentioned mechanisms with time between installation and loading. The relative effect of each of these factors is investigated in this thesis.

Download or read book Assessment of Axially Loaded Pile Dynamic Design Methods and Review of Indot Axially Loaded Pile Design Procedure written by Dimitrios Loukidis and published by Purdue University Press. This book was released on 2008-03-01 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: The general aim of the present research is to identify areas of improvement and propose changes in the current methodologies followed by INDOT for design of axially loaded piles, with special focus on the dynamic analysis of pile driving. Interviews with INDOT geotechnical engineers and private geotechnical consultants frequently involved in INDOT's deep foundation projects provided information on the methods and software currently employed. It was found that geotechnical engineers rely on static unit soil resistance equations that were developed over twenty years ago and that have a relatively large degree of empiricism. Updated and improved static design equations recently proposed in the literature have not yet been implemented in practice. Pile design relies predominantly on SPT data; cone penetration testing is performed only occasionally. Dynamic analysis of pile driving in standard practice is performed using Smith-type soil reaction models. A comprehensive review of existing soil reaction models for 1-dimensional dynamic pile analysis is presented. This review allowed an assessment of the validity of existing models and identification of their limitations. New shaft and base reaction models are developed that overcome shortcomings of existing models and that are consistent with the physics and mechanics of pile driving.

Download or read book Use of Quasi static Friction Cone Penetrometer Data to Predict Load Capacity of Displacement Piles written by Larry Curtis Nottingham and published by . This book was released on 1975 with total page 1106 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study to determine the applicability of quasi-static friction cone penetrometer data for predicting the load capacity of displacement piles is presented. The study included performing and evaluating 108 load tests on large-scale model piles, from which load capacity prediction equations were developed. Data from load tests on 15 full-scale piles were used to verify the equations developed from the model pile tests. Three types of model piles were used in the study: a 4.0 in square precast concrete pile; a 4.0 in diameter pipe pile; and a step-taper pile with section diameters ranging from 2.9 to 4.5 in. All piles were driven and tested under field conditions to simulate an actual pile situation, and each pile was instrumented to permit separation of total load capacity into end bearing and side friction components. Each test site was investigated with a Begemann mechanical friction sleeve penetrometer and a Fugro electrical friction sleeve penetrometer, and tests were conducted in both cohesive and granular soils. The different combinations of soil types, penetrometer types', and pile types investigated permitted development of design equations applicable to a wide variety of situations. The results of this study show that the Begemann procedure for estimating pile end bearing capacity in granular soils provided good agreement with the load test results and is a valid design tool. It is also demonstrated that the Begemann procedure is valid for cohesive soils and electrical penetrometer data. When using mechanical penetrometer data for cohesive soils, it is necessary to correct the penetrometer data for tip mantle friction effects before the data can be used to predict pile end bearing capacity. Equations and design curves are developed and presented to permit estimating pile side friction from penetrometer sleeve friction (fs) data. The equations provide answers which agree well with measured side friction resistance on the model piles and the total predicted capacity for full-scale piles, obtained by adding predicted end resistance and side friction, agree well with measured total capacity. It is shown thai f s values in yranular soils differ significantly for the mechanical and electrical penetrometers, primarily because of end bearing on the lower beveled portion of the mechanical penetrometer friction sleeve. Separate design curves which account for this difference are presented for each penetrometer type. A conventional undrained shear strength approach is recommended for predicting pile side friction in cohesive soils. For the soils investigated, it is shown that measured f $ values are approximately equal for the two penetrometers used and that fs is approximately equal to the undrained shear strength of the soil, as determined from conventional laboratory tests. Drained friction methods of estimating side friction in cohesive soils are also evaluated, and it is concluded that the drained friction approach will ultimately provide a more accurate and fundamentally more correct solution to the pile friction problem. A method of estimating the shaft resistance of step-taper piles is presented in which the shaft resistance is divided into side friction and step-bearing components. Side friction is estimated using equations for a constant section pile and step bearing is estimated from conebearing resistance at the diameter step levels. Predictions obtained in this manner agreed well with measured shaft resistance. The prediction method for step-taper piles is extended for use with continuously tapered piles and used to estimate the capacity of full-scale timber piles. The agreement between measured and predicted capacity is good. It is concluded that the quasi-static cone penetrometer is a valuable tool for estimating the load capacity of displacement piles.

Download or read book Case Pile Wave Equation Analysis written by Robert D. Edde and published by . This book was released on 1991 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experimental Research Into the Behavior of Piles and Pile Groups Subjected to Cyclic Lateral Loading written by Lymon C. Reese and published by . This book was released on 1988 with total page 209 pages. Available in PDF, EPUB and Kindle. Book excerpt: A research program to study the behavior of piles and pile groups subjected to cyclic lateral loading was conducted at a Houston, Texas site. A single pile and a nine-pile group situated in the natural clay were tested and then the upper several feet of clay were removed and replaced with sand and the tests were repeated. Following these tests, another study was undertaken to measure experimentally pile-head flexibility reduction (interaction) factors for the pile group in sand. Tests were made cyclically at varying magnitudes of applied groundline shear on single piles and two-pile and three-pile subgroups, and the response of unloaded piles in the group was measured. Concurrent with these studies, pressuremeter (PMT) and cone penetrometer (CPT) tests were performed in both the clay and the sand from which capacity predictions were made. Each of these studies generated a report with voluminous data. This report summarizes the major findings into one volume. Keywords: Cyclic lateral loading, Interaction factors, Piles, Pile groups, Scour, Pile structures. (SDW).