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Showing 1 to 20 of 28 for “"deep foundations"”.
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Design methods for deep foundations
… enable the analysis and design of groups of deep foundations to be done more efficiently. The simplified procedure was used to analyze four well documented and well instrumented case histories of laterally loaded pile groups. Comparison of the predicted and measured results indicate that the …
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Modelling Tremie Concrete Placement in Deep Foundations
Cast-in-place foundations are typically constructed using the Tremie Method of concrete emplacement. A pipe and hopper system is used to fill an excavation from the base up with a specialised, highly workable concrete called Tremie Concrete. In this thesis, numerical modelling and experimental …
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Underpinning strategies for buildings with deep foundations
… nearly any geotechnical problem related to the foundations of a structure. This paper discusses these techniques with an emphasis on grouting and micropiling underpinning systems. Furthermore, some practical case studies such as the current Boston Central Artery Project (Big Dig), where these …
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Analysis of shallow and deep foundations using soil-structure interaction techniques
… the performance of both piled and plain raft foundations to be predicted. Throughout the work the substructure is modelled using a beam-column idealization. This allows the superstructure configuration to be readily incorporated into the model enabling the soil-structure interaction of the …
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Reliability of Serviceability and Strength of Deep Foundations Embedded in (p-y) Sand Below Water Table Subjected to Lateral Cyclic Loading
… issue with the soil (especially in designing foundations for bridges), or when large uplift capacity is needed. In many engineering applications the piles are subjected to lateral loads as well as axial loads. Many design variables (uncertainties) affect the behavior of laterally loaded piles …
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ANALYSIS OF THE EFFECTS OF HEAVILY LOADED MAT FOUNDATION ON ADJACENT DRILLED SHAFT FOUNDATION
Construction of heavily loaded shallow foundations adjacent to deep foundation is generally avoided in common geotechnical engineering practice to minimize additional loads on deep foundations. However, with the growing trend of urbanization leading to a demand of new construction, it is not always …
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Prediction of deflection of helical anchors under load
… In complicated structural systems with deep foundations, correct calculation of the distribution of load and serviceability requires proper modeling of axial load-deflection characteristics. To keep pace with advances in structural analysis, there is much need for more practical and …
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Collapse of stone column foundations due to inundation.
… such soils is difficult at best. In many cases, deep foundations may be required to transmit foundation loads to suitable bearing strata below the 'collapsible' soil deposit. This research has studied the behaviour and performance of stone columns confined and not confined by geofabrics and rigid …
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System Reliability Analysis of Defected Pile group Foundations
Deep foundations design suffers some degrees of uncertainties. This thesis studies the behavior of defected pile group foundations installed in sand and calibrates the resistance factor of pile group foundation, utilizing a rational based system reliability analysis. This was achieved by conducting …
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Contribuição ao cálculo de recalques de estacas
… is to evaluate the deformation behaviour of deep foundations, by means of simple methods that require a small amount of geotechnical data which are available for the design in foundation engineering. Sophisticated numerical methods like the Finite Element Method or the Boudary Element Method …
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Estudo de correlações entre os ensaios de penetração estática e dinâmica e suas aplicações ao projeto de fundações profundas
… field tests to determine the bearing capacity of foundations, particularly deep foundations, explains the necessity to check, or modify, existing correlations between the "standard penetration test" and the "diepsondering". Considerations are made concerning the statistical approach to the problem …
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Full-Scale-Lateral-Load Test of a 1.2 m Diameter Drilled Shaft in Sand
… models associated with laterally loaded deep foundations have typically been based on load tests involving relatively small diameter foundations. The lateral soil resistance for larger diameter foundations has been assumed to increase linearly with diameter; however, few, if any load …
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Finite element analyses of pile load tests performed in the Yorktown formation, Newport News, Virginia
… method shows promise for use in the design of deep foundations systems in the Tidewater area of Virginia.
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Performance of foundations in a rising groundwater environment
… such an increase in pore pressure would have on foundations in overconsolidated clay was investigated. The performance of foundations in stiff clay during a rising ground water event was investigated by means of centrifuge model tests. The model tests included comparisons of the behaviour of …
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Axial behavior of drilled shafts in soft rock
Shallow foundations are commonly not suitable to support the load of heavy structures such as tall buildings or bridges because the resulting contact pressures far exceeds the allowable pressure of the near-surface soils leading to bearing capacity failure or excessive settlements. Therefore, deep …
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Public Housing on Risky Ground: A National Study of Flood Risk and Two Case Studies Investigating the Legacy of Environmental Inequality
… pressures is being torn down and rebuilt with deep foundations using Low Income Housing Tax Credits, which requires private investment interests in the neighborhood. These cases reveal how historical siting decisions formed environmental inequality in public housing and how decision-making …
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Geotechnical behavior of shell foundations
The geotechnical behavior of shell foundations was investigated experimentally, numerically, and theoretically. Experimental investigation was carried out on nine prototype foundation models in loose, medium, and dense sands. Experimental set-up was organized and instrumented to perform the testing …
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Assessment of Seismic Behaviour of Large LNG Tanks Considering Soil-Foundation- Structure Interaction
… the load of such heavy structures. Thus usually, deep foundations are used to support these tanks. Indeed, pile foundations are commonly used for these large tanks to transfer the load to competent ground layers and control the settlement. Generally, assessing the seismic resilience of these …
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Characterization of "t-z" model design parameters for augered cast-in-place piles using field load test data
… interaction model to evaluate the settlement of deep foundations. The soil-structure interaction modeled in this analysis was based on hyperbolic load displacement behavior using effective (drained) stresses. The development of the “t-zâ€� model parameters has been accomplished using finite …
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The development of shaft friction in semi-fullscale piles passing through granular soils
… stratum.<br/><br/>The available literature on deep foundations is reviewed. It was found that the amount of literature pertaining to pile behaviour in layered soils was limited.<br/><br/>A model pilot study showed that the most efficient means of eliminating end bearing, while simulating an …
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