Download or read book Experimental Investigation of the Combined Load Response of Model Piles Driven in Sand written by Jintae Lee and published by . This book was released on 2011 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although the load applied on a pile is usually a combination of a vertical and a lateral load, there have been few studies done on the response of piles subjected to combined loading; these studies; in addition, produce results that are inconsistent with respect to the effects of axial loads on the lateral load response of piles. In this paper, we present the results of model pile load tests performed to assess the influence of axial loads on the lateral response of piles driven in sand. Using a drop hammer, an instrumented circular model pile was driven into large-scale sand samples prepared in a cylindrical steel tank with various densities using a pluviation method. Lateral load tests were performed on the model pile subjected to different axial loads. The combined load test results showed that the presence of an axial load on a driven pile is detrimental to its lateral capacity, for the lateral deflection of the model pile head increased with increasing axial load. The bending moments at the pile head increased substantially (by 10 %, 36 % and 39 % for loose, medium dense and dense sand, respectively) in the presence of axial loads.

Download or read book Construction in Geotechnical Engineering written by Madhavi Latha Gali and published by Springer Nature. This book was released on 2020-09-12 with total page 763 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume comprises select papers presented during the Indian Geotechnical Conference 2018. This volume discusses construction challenges and issues in geotechnical engineering. The contents cover foundation design and analysis, issues related to geotechnical structures, including dams, retaining walls, embankments and pavements, and rock mechanics and construction in rocks and rocky environments. Many of the papers discuss live case studies related to important geotechnical engineering projects worldwide, providing useful insights into the realistic designs and constructions. This volume will be of interest to students, researchers and practitioners alike.

Download or read book Recent Advances in Materials Mechanics and Management written by Sheela Evangeline and published by CRC Press. This book was released on 2019-05-14 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings present a selection of papers presented at the 3rd International Conference on Materials Mechanics and Management 2017 (IMMM 2017), which was jointly organized by the Departments of Civil Engineering, Mechanical Engineering and Architecture of College of Engineering Trivandrum. Developments in the fields of materials, mechanics and management have paved the way for overall improvements in all aspects of human life. The quest for meeting the requirements of the rapidly increasing population has led to revolutionary construction and production technologies aiming at optimum management and use of natural resources. The objective of this conference was to bring together experts from academic institutions, industries, research organizations and professionals for sharing of knowledge, expertise and experience in the emerging trends related to Civil Engineering, Mechanical Engineering and Architecture. IMMM 2017 provided opportunities for young researchers to actively engage in research discussions, new research interests, research ethics and professional development.

Download or read book Experimental Investigation of CFFP Soil Interaction in Sand Under Cyclic Lateral Loading written by Wei Qin and published by . This book was released on 2019 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental investigation was conducted on the response of concrete-filled fiber-reinforced polymer piles (CFFPs) in dry sand subjected to lateral cyclic loading. Two types of instrumented model pile tests were conducted. Fifteen tests were conducted with typical load magnitudes and numbers of cycles, and one test was conducted under static loading. The series of tests provided continuous measurements of the bearing characteristics of the model piles and of the responses of the piles and soil because of differences in the pile sizes, cycle frequencies, and numbers of cycles. Significant softening or degradation of the soil near the tested piles was found under large lateral cyclic loads. The rate effect was also determined by changing the cycle frequency. The behavior of the softening and the rate effect were determined by varying the number of cycles and the magnitude of the loads. The tests demonstrate that the maximal bending moment and soil resistance of CFFPs degrade by approximately 15 % and 25 %, respectively, from 50 to 700 cycles at the ultimate loading level. These tests confirm that the maximal bending moment was 35 % to 50 % greater under dynamic loading than under static loading, and the soil degradation was remarkable. The relatively short CFFPs more easily reached the ultimate state than the long CFFPs. The results were used to fit the modulus of subgrade reaction (k), and a new formula to predict k is proposed, which shows good precision.

Download or read book Grain scale Investigation of Sand pile Interface Under Axial Loading Conditions Using X ray Tomography written by Jeanne Doreau Malioche and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This doctoral work presents an experimental investigation into the mechanisms governing the macroscopic response of sand-pile interface during monotonic installation and subsequent axial cyclic loading. An innovative approach combining x-ray tomography and advanced image analysis tools is employed to extract information at different scales, including the micro-scale. A quantitative analysis of the behavior of individual sand grains in the vicinity of the pile offers valuable three-dimensional (3D) data set against which theoretical or numerical approaches could be tested.A series of tests is run on an instrumented close-ended conical model pile installed by monotonic jacking in a dense calcareous sand sample. Following the installation, the model pile is submitted to a large number of axial displacement-controlled loading cycles (a few thousands cycles) under constant normal stress. The tests are performed in a mini-calibration chamber that allows the acquisition of high resolution x-ray images at different stages of the loading. The chamber is admittedly not representative of field pile testing conditions for the main following reasons: the calibration chamber-to-pile diameter ratio and the sand particle-to-pile diameter ratio are far below the ratios recommended in the literature to limit scale effects on the interface response. Consequently, the results presented in this work can not, and should not, be directly extrapolated to field pile design. Yet, such a setup is able to reproduce qualitatively trends that are similar to those obtained at the macro-scale on large-scale experiments and allows the observation of full-field mechanisms taking place at the micro-scale.3D images resulting from the reconstruction of the x-ray scans are used to identify and follow the evolution of individual sand grains. Full-kinematics are measured thanks to a 3D Digital image Correlation (DIC) code, “TomoWarp2”. Image processing tools are also employed to measure local porosity changes and the production of fines by grain crushing at the interface.During pile installation, different zones where grains displacements concentrate are identified. A recirculation of the grains alongside the pile is also observed. Globally, the sand mass exhibits a dilative behavior except within a relatively thin layer (about 3 to 4·D50 thickness) around the model pile where grain crushing occurs. During subsequent loading cycles, the macroscopic response of sand-pile interface shows a two-phases evolution, with a non negligible increase of shaft resistance in the latter phase. For these two phases, the measurement of grain kinematics reveals a different behavior of the sand mass associated with a significant densification at the interface. In the first phase, the sand mass contracts radially within a region of thickness 4·D50. This mechanism is likely due to inter-granular rearrangement as measure by DIC. In the second phase, sand grains hardly move and the sand mass reaches a threshold density for which the friction on the shaft starts to increase substantially.

Download or read book Experimental Study of Ultimate Uplift Resistance of Roughened Model Piles in Sand written by Ahmed Shlash and published by . This book was released on 1994 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geomechanics from Micro to Macro written by Kenichi Soga and published by CRC Press. This book was released on 2014-08-26 with total page 1668 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geomechanics from Micro to Macro contains 268 papers presented at the International Symposium on Geomechanics from Micro and Macro (IS-Cambridge, UK, 1-3 September 2014). The symposium created a forum for the dissemination of new advances in the micro-macro relations of geomaterial behaviour and its modelling. The papers on experimental investigati

Download or read book Implementation of Laterally Loaded Piles in Multi Layer Soils written by Monica Prezzi and published by Purdue University Press. This book was released on 2009-11-15 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ICPMG2014 Physical Modelling in Geotechnics written by Christophe Gaudin and published by CRC Press. This book was released on 2019-01-08 with total page 1366 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 8th International Conference on Physical Modelling in Geotechnics (ICPMG2014) was organised by the Centre for Offshore Foundation Systems at the University of Western Australia under the auspices of the Technical Committee 104 for Physical Modelling in Geotechnics of the International Society of Soil Mechanics and Geotechnical Engineering. This quadrennial conference is the traditional focal point for the physical modelling community of academics, scientists and engineers to present and exchange the latest developments on a wide range of physical modelling aspects associated with geotechnical engineering. These proceedings, together with the seven previous proceedings dating from 1988, present an inestimable collection of the technical and scientific developments and breakthroughs established over the last 25 years. These proceedings include 10 keynote lectures from scientific leaders within the physical modelling community and 160 peer-reviewed papers from 26 countries. They are organised in 14 themes, presenting the latest developments in physical modelling technology, modelling techniques and sensors, through a wide range of soil-structure interaction problems, including shallow and deep foundations, offshore geotechnics, dams and embankments, excavations and retaining structures and slope stability. Fundamental aspects of earthquake engineering, geohazards, ground reinforcements and improvements, and soil properties and behaviour are also covered, demonstrating the increasing complexity of modelling arising from state-of-the-art technological developments and increased understanding of similitude principles. A special theme on education presents the latest developments in the use of physical modelling techniques for instructing undergraduate and postgraduate students in geotechnical engineering.

Download or read book Physical Modelling in Geotechnics Two Volume Set written by Sarah Springman and published by CRC Press. This book was released on 2010-06-17 with total page 1522 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book results from the 7th ICPMG meeting in Zurich 2010 and covers a broad range of aspects of physical modelling in geotechnics, linking across to other modelling techniques to consider the entire spectrum required in providing innovative geotechnical engineering solutions.Topics presented at the conference:Soil - Structure - Interaction;

Download or read book Effects of Stress History of Sand on the Shaft Resistance of Large Displacement Piles written by Fabrizio Di Camillo and published by . This book was released on 2014 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental investigation on the coefficient of earth pressure of overconsolidated cohesionless soil developed around displacement piles was conducted. An instrumented prototype set-up and model pile was developed in the laboratory. The set-up was capable of measuring the total load, the shaft resistance acting on the pile and the overconsolidation ratio in the sand mass. Overconsolidated sand was prepared by placing the sand in the testing tank in layers, each subjected to a predetermined compaction effort. The stresses in the sand mass were measured by means of pressure transducer units placed in selected locations in the testing tank. The model piles were driven into the sand mass to a selected depth. Pile load tests were conducted at a constant rate of penetration at different depths. The pile capacity was determined from load-displacement curves. The shaft resistance and, hence, the coefficient of earth pressure around the pile were determined. The results showed that the coefficient of earth pressure is heavily dependent on the stress history of the sand mass. A theoretical model was developed to incorporate the effects of overconsolidation of the sand on the shaft resistance of driven piles in cohesionless soils.

Download or read book Experimental Investigation of the Stresses in a Vertical Model Pile and the Surrounding Soil Under a Lateral Load written by James Joseph Furney and published by . This book was released on 1964 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Experimental Investigation of Cyclically Axially Loaded Piles in Sand written by Sean John Cowburn and published by . This book was released on 1993* with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experimental Response of a Pile in Sand Under Static and Cyclic Lateral Loads written by Pegah Oghabi and published by . This book was released on 2014 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Piles are engineering structures which are subjected to axial and lateral loading. In this dissertation, pile load tests were performed on a full-scale fabricated pile to understand lateral pile responses under static and cyclic loading. The experiments were performed on a fabricated test pile at the Geo-Engineering Laboratory at Queen's University. Dry loose Olimag Synthetic Olivine sand was used as the test soil. Instrumentation including axial strain gauges, null sensors (earth pressure sensors) and string potentiometers were used to monitor pile responses throughout the tests. What differentiates the current study from previous investigations is direct measurements of lateral earth pressure on a test pile using those null sensors with conventional measurements of curvature and deformation. The null sensors of Talesnick (2005) have 'infinite stiffness' and calibration that is almost independent of the soil type, soil condition and stress history, qualities that make the sensor superior to other commercially available sensors. The initial pile response under static loading was examined. Previous laterally loaded pile test programs have utilized curvature measurements to infer moments, and differentiation of moments to determine lateral forces. Comparisons with the directly measured pressures confirmed the effectiveness of differentiated moments. To understand offshore structures, the behaviour of a pile subjected to cyclic loading is examined and explained by elastic soil response at low load levels and the progressive development of inelastic response at higher load levels. In addition, the loading condition (i.e. two-way versus one-way loading) was found to have a substantial effect on pile responses. The pressure distributions for two-way cyclic loading suggest that the lateral pressure is proportional to displacement with peak pressures near the ground surface during elastic responses. The peak lateral pressures move deeper towards the point of rotation with increasing cyclic loads to generate inelastic responses. However, the lateral pressure response is consistently inelastic for one-way loading.

Download or read book Cone Penetration Testing 2018 written by Michael A. Hicks and published by CRC Press. This book was released on 2018-06-13 with total page 757 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cone Penetration Testing 2018 contains the proceedings of the 4th International Symposium on Cone Penetration Testing (CPT’18, Delft, The Netherlands, 21-22 June 2018), and presents the latest developments relating to the use of cone penetration testing in geotechnical engineering. It focuses on the solution of geotechnical challenges using the cone penetration test (CPT), CPT add-on measurements and companion in-situ penetration tools (such as full flow and free fall penetrometers), with an emphasis on practical experience and application of research findings. The peer-reviewed papers have been authored by academics, researchers and practitioners from many countries worldwide and cover numerous important aspects, ranging from the development of innovative theoretical and numerical methods of interpretation, to real field applications. This is an Open Access ebook, and can be found on www.taylorfrancis.com.

Download or read book Experimental Investigation of Lateral Loads on Pile Foundations During a Seafloor Slope Failure written by Michael Lawrence Lithman and published by . This book was released on 1977 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ICP Design Methods for Driven Piles in Sands and Clays written by Richard Jardine and published by Thomas Telford Limited. This book was released on 2005 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: Broadening the recommendations published by Jardine and Chow in 1996, this volume provides procedures that can be applied by geotechnical engineers, supported by worked examples for sands and clays. It also offers guidance on application to a range of pile types, geotechnical profiles and loading conditions.