Download or read book Dynamic Testing of a Full scale Pile Cap with Dense Silty Sand Backfill written by Todd J. Valentine and published by . This book was released on 2007 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Full-scale dynamic lateral load tests were performed on a pile cap with a dense silty sand backfill condition. Two hydraulic load actuators connected a test pile cap with a reaction cap. The load actuators incrementally loaded the test cap up to 50 mm of displacement. After each load increment, the displacement was held constant while an eccentric mass shaker induced dynamic loads under a ramping sequence from 1 Hz to 10 Hz. A baseline response was developed under a no backfill condition. Passive soil pressure was measured using pressure cells and tactile sensors.
Download or read book Dynamic Full scale Testing of a Pile Cap with Loose Silty Sand Backfill written by Immanuel Kaleoonalani Runnels and published by . This book was released on 2007 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pile caps are used in foundation design to aid multiple single piles to act as a pile group to resist lateral forces that may cause overturning moments. The pile cap and pile group resist these forces by pile-soil-pile interaction, base and side friction along the pile cap-backfill interface, and passive earth resistance. Passive earth resistance has been neglected in design due to a limited amount of full-scale testing.
Download or read book Cyclic and Dynamic Full scale Testing of a Pile Cap with Loose Silty Sand Backfill written by Immanuel K. Runnels and published by . This book was released on 2007 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Behavior of a Full scale Pile Cap with Loosely and Densely Compacted Clean Sand Backfill Under Cyclic and Dynamic Loadings written by Colin Reuben Cummins and published by . This book was released on 2009 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: The passive earth pressure from the backfill was found to significantly increase the load capacity of the pile cap. At a displacement of about 46 mm, the loosely and densely compacted backfills increased the total resistance of the pile cap otherwise without backfill by 50% and 245%, respectively.
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 1530 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; Natural Hazards; Earthquake Engineering: Soft Soil Engineering; New Geotechnical Physical; Modelling Facilities; Advanced Experimental Techniques; Comparisons between Physical and Numerical Modelling Specific Topics: Offshore Engineering; Ground Improvement and Foundations; Tunnelling, Excavations and Retaining Structures; Dams and slopes; Process Modelling; Goenvironmental Modelling; Education
Download or read book Lateral Pile Cap Load Tests with Gravel Backfill of Limited Width written by Kyle M. Rollins and published by . This book was released on 2010 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study investigated the increase in passive force produced by compacting a dense granular fill adjacent to a pile cap or abutment wall when the surrounding soil is in a relative loose state. Lateral load tests were performed on a pile cap with three backfills to evaluate the static and dynamic behavior. One backfill consisted of loose silty sand while the other two consisted of dense gravel zones 3 ft. (0.91 m) and 6 ft. (1.82 m) wide between the pile cap and the loose silty sand. The 3 ft. and 6 ft. wide dense gravel zones increased the lateral resistance by 75% to 150% and 150% to 225%, respectively, relative to the loose silty sand backfill. Despite being thin relative to the overall shear length, the 3 ft. and 6 ft. wide gravel zones increased lateral resistance to 59% and 83%, respectively, of the resistance that would be provided by a backfill entirely composed of dense gravel. The dynamic stiffness for the pile cap with the gravel zone decreased about 10% after 15 cycles of loading, while the damping ratio remained relatively constant with cycling. Dynamic stiffness increased by about 10% to 40% at higher deflections, while the damping ratio decreased from an initial value of about 0.30 to around 0.26 at higher deflections.
Download or read book Numerical Analysis of Dense Narrow Backfills for Increased Passive Resistance written by Kyle L. Rollins and published by . This book was released on 2010 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lateral Load Tests on Full scale Pile Groups in Cohesive Soils written by and published by . This book was released on 1973 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of the Resistance of Pile Caps and Integral Abutments to Lateral Loading written by Robert L. Mokwa and published by . This book was released on 2000 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transportation Research Record written by and published by . This book was released on 2000 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pile Behaviors in Shales Through Full scale Static Load Testing Dynamic Testing and Finite Element Analysis written by Md. Shafiqul Islam and published by . This book was released on 2021 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: The design of driven piles has drawn significant interest among the researchers in soils, however occasionally addressed in the shale. A trustworthy design methodology for driven piles in shale is yet to be developed due to lacking a high-quality database. Consequently, the conventional static analysis methods developed for soils are used to estimate driven piles' resistances in shale, creating uncertainty in pile design. Moreover, the use of the Wave Equation Analysis Program (WEAP) for estimation of pile capacity is restricted by geomaterial input for shale. Additionally, the WEAP manual does not provide recommendations for the selection of dynamic properties for the analysis of piles. Also, the behavior of piles in shale, pile-shale interaction, and failure mechanism is unknown and yet to be established. Hence, this study aims to develop efficient static analysis methods for estimation of skin friction and end bearing of driven piles in the shale using 49 historical test piles data collected from the Kansas department of transportation (KDOT). Furthermore, the proposed static analysis methods are validated and compared against 23 dynamic test results of independent test pile data. This research recommends damping factors of 0.12 s/ft and 0.107 s/ft for two different input methods while keeping a toe and shaft quake value of 0.1 in for both methods. Moreover, the LRFD resistance factors are proposed for the developed static analysis methods and WEAP to achieve the target safety margin in the design and construction of piles in shale. Finally, using an extensive finite element analysis, the pile-IGM interaction behaviors and failure mechanism are investigated through validating the load-settlement response of the pile with static load test results.
Download or read book Design of Pile Foundations written by Aleksandar Sedmak Vesić and published by Transportation Research Board. This book was released on 1977-01-01 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Full Scale Test on Pile Caps written by Parmatha N. Beri and published by . This book was released on 1975 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pile Design and Construction Practice written by Willis H. Thomas and published by CRC Press. This book was released on 2007-12-06 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt: This international handbook is essential for geotechnical engineers and engineering geologists responsible for designing and constructing piled foundations. It explains general principles and practice and details current types of pile, piling equipment and methods. It includes calculations of the resistance of piles to compressive loads, pile group
Download or read book Passive Force deflection Behavior for Abutments with MSE Confined Approach Fills written by Kyle M. Rollins and published by . This book was released on 2010 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: Approach fills behind bridge abutments are commonly supported by wrap-around mechanically stabilized earth (MSE) walls; however the effect of this geometry on passive force development is unknown. This report describes the first large-scale tests to evaluate passive force-deflection curves for abutments with MSE wingwalls. A test was also performed with fill extending beyond the edge of the abutment wall for comparison. The abutment wall was simulated with a pile supported cap 5.5 ft high, 11 ft wide, and 15 ft long in the direction of loading. The backfill behind the pile cap consisted of clean sand compacted to 96% of the modified Proctor maximum density. As the pile cap was loaded laterally, pressure on the MSE wall led to pull-out of the steel reinforcing grids and the MSE wall panels moved outward about 2% of the wall height when the ultimate passive force developed. Despite pullout, the passive force per effective width was 28 kips/ft for the pile cap with MSE wingwalls compared to 22.5 kips/ft for the cap without wingwalls. Nevertheless, the passive force with the MSE wingwalls was still only 76% of the resistance provided by the cap with fill extending beyond the edges. The pile cap with MSE walls required greater movement to reach the ultimate passive force (deflection of 4.2% of wall height vs. 3%). The Caltrans method provided good agreement with the measured passive resistance while the log spiral method required the use of a higher plane strain friction angle to provide reasonable agreement.
Download or read book Subsurface Conditions written by Keith Turner and published by Springer. This book was released on 2008-01-26 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: Characterisation of the shallow subsurface has gained in importance as civil and geotechnical engineering and environmental applications have become more dependent on a precise definition of geomechanical and geohydrological properties. A better understanding of the subsurface conditions offers wide-ranging benefits to governments, industry and individual citizens. Subsurface geological modelling became an economic and technologic reality in the late 1980's, when competing 3-D geoscientific information systems were the subject of considerable research and evaluation, especially by the petroleum exploration industry. Investigations in the shallow subsurface impose additional requirements that have only recently become technically and economically achievable. The very shallow urban underground environment, where many infrastructure and utilities elements are located, presents the most difficult characterisation problems. Subsurface modelling techniques have matured, along with modern data base concepts. The evolution of the Internet and Web-browser technologies has expanded information transmission and dissemination capabilities. Subsurface models are being integrated with decision-support systems to provide predictions of technical and economic performance. Yet even the most sophisticated of these models leave some uncertainty in geologic interpretation. A variety of techniques for assessing uncertainty have been developed and are being evaluated.
Download or read book Geotechnical abstracts written by and published by . This book was released on 1978 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt:
