Book•
Foundation analysis and design
01 Jan 1968-
TL;DR: In this paper, Fondation de soutenagement et al. presented a reference record for Dimensionnement Reference Record created on 2004-09-07, modified on 2016-08-08.
Abstract: Keywords: Fondation ; Mur de soutenement ; Pieux ; Capacite portante ; Ancrage ; Dimensionnement Reference Record created on 2004-09-07, modified on 2016-08-08
Citations
More filters
TL;DR: In this article, the authors test the ability of biological enhancement to reduce the time to reach biological stabilization of the waste to non-degradable matter, and to determine the effects of biodegradation on settlement.
Abstract: Landfills are frequently considered for urban development, but have limited end uses due to large differential settlements, leachate generation, and gas emissions. Current landfill design with top- and bottom-liner systems minimize entry of moisture and increase the period required for stabilization of the refuse to occur. The objective of this study is to test the ability of biological enhancement to reduce the time to reach biological stabilization of the waste to non-degradable matter, and to determine the effects of biodegradation on settlement. To accomplish this, six landfill test cells were constructed to model both settlement and decomposition over extended periods. Three cells were designed to simulate bioreactor landfills, while another three were designed to simulate secure vaults. Results demonstrated that secondary settlement is linear with the logarithm of time, and decomposition is well represented by a first-order model. Comparisons indicate that in the short term there is no significant increase in the settlement rate due to biodegradation, however, extrapolation suggests that in the long term the settlement rate will likely increase as the effects of decomposition become more significant.
217 citations
TL;DR: In this paper, a hybrid approach for the analysis of piled raft foundations, based on a load transfer treatment of individual piles, together with elastic interaction between different piles and with the raft, is described.
Abstract: A piled raft foundation comprises both piles and a pile cap that itself transmits load directly to the ground. The aim of such a foundation is to reduce the number of piles compared with a more conventional piled foundation where the bearing effect of the pile cap, or raft, is ignored. This paper describes a ‘hybrid’ approach for the analysis of piled raft foundations, based on a load transfer treatment of individual piles, together with elastic interaction between different piles and with the raft. The numerical analysis is used to evaluate a simple approximate method of estimating the overall response of the foundation from the response of the component parts. The method leads to estimates of the overall foundation stiffness, the proportion of load carried by the pile group and the raft, and an initial assessment of differential settlements. Parametric studies are presented showing the effect of factors such as raft stiffness and pile spacing, length and stiffness, and a worked example is included demonstrating the accuracy of the approximate design approach.
194 citations
Book•
28 Oct 2013
TL;DR: The first introductory geotechnical engineering textbook to cover both saturated and unsaturated soil mechanics is the Introduction to Geotechnically Engineering (INGEE) as mentioned in this paper, written by a leader on the subject.
Abstract: Written by a leader on the subject, Introduction to Geotechnical Engineering is first introductory geotechnical engineering textbook to cover both saturated and unsaturated soil mechanics. Destined to become the next leading text in the field, this book presents a new approach to teaching the subject, based on fundamentals of unsaturated soils, and extending the description of applications of soil mechanics to a wide variety of topics. This groundbreaking work features a number of topics typically left out of undergraduate geotechnical courses.
192 citations
Cites background from "Foundation analysis and design"
...Among the sources for these correlations are Bowles (1996), FHWA (2010), Briaud and Miran (1992a, 1992b), Briaud (1992), and Mayne (2007a, 2007b)....
[...]
...Among the sources of these ranges of values are Lambe and Whitman (1979), Hunt (1986), USACE (1990), Bowles (1996), AASHTO (2007), and FHWA (2010)....
[...]
...Among the sources of these ranges of values are Lambe and Whitman (1979), Hunt (1986), USACE (1990), Bowles (1996), AASHTO (2007), and FHWA (2010). In summary, common values of soil moduli vary between 1MPa and 150MPa; Poisson’s ratio is about 0....
[...]
TL;DR: In this paper, the bearing capacity factor was computed for smooth and rough footings, for friction angles, ϕ, in the 30°-45° range, and dilation angles in the 0 ≤ψ≤ϕ range.
Abstract: Plane-strain, finite-element, and finite-difference computations of the bearing-capacity factor, Nγ, have been made for smooth and rough footings, for friction angles, ϕ, in the 30°–45° range, and dilation angles, ψ, in the 0 ≤ψ≤ϕ range. The finite-element analyses were based on a tangent stiffness approach. The commercially available code, fast Lagrangian analysis of continua (FLAC), was used for the finite-difference analyses. It was found that these methods may be used to obtain reliable Nγ values provided they are used cautiously. To obtain high-quality solutions, however, it is necessary to review the results critically, and, if necessary, alter the control parameters (e.g., mesh dimensions, number of calculation increments) being used. Computational difficulties were found to increase with increasing ϕ, and with increasing difference between ϕ and ψ, and the significant of these difficulties with regard to the use of the two computational techniques is discussed here. Curves relating Nγ to ϕ are pre...
191 citations
TL;DR: The use of bentonite alone or amended with natural soils for construction of liners for water-retention and waste-containment facilities is very common as mentioned in this paper, and the importance of the bentonite content in reduc...
Abstract: The use of bentonite alone or amended with natural soils for construction of liners for water-retention and waste-containment facilities is very common. The importance of bentonite content in reduc...
178 citations