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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
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TL;DR: In this article, the authors present an investigation of the shallow subsurface below and around a historic building affected by differential settlements in order to define its geometry and to characterise its stiffness at low strain.
Abstract: The reconstruction of the current status of a historic building is essential for seismic safety assessment
and for designing the retrofitting interventions since different safety and confidence factors
have to be assumed, depending on the level of information about the subsoil structure. In this work,
we present an investigation of the shallow subsurface below and around a historic building affected
by differential settlements in order to define its geometry and to characterise its stiffness at low
strain. To this end, we employed high-resolution electrical resistivity and seismic (both P-wave and
S-wave) tomographies. A three-dimensional electrical resistivity tomography survey was performed
to obtain more information about the type and the maximum depth of the building foundation.
Electrical resistivity and seismic tomographies were carried out alongside the building, aimed at
imaging the top soils and the near-surface geometry. The corresponding inverted models pointed out
a remarkable heterogeneity of the shallow subsoil below the building, which is partly founded on a
weathered layer and partly on a more rigid lithotype. This heterogeneity is probably a concurrent
cause of the building’s instability under both static and seismic loading. Our results demonstrate that
the man-made fillings and the top soils have to be thoroughly investigated to fully understand the
soil-structure behaviour. In this light, the integration of non-invasive high-resolution geophysical
techniques, especially tomographic methods, has been proved to properly address the problem of
imaging the shallow subsoil.
2 citations
Cites methods from "Foundation analysis and design"
...The blow counts pertaining to the travertineous unit (z > 8 m) can be associated to a medium-stiff lithotype according to normally adopted criteria (Bowles 1996)....
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14 Oct 2007
TL;DR: The Third Edition of the DMSRW, completed in 2006, incorporates significant changes in the state-of-the-art regarding MSEW and SRW topics as mentioned in this paper.
Abstract: The National Concrete Masonry Association (NCMA) published the First Edition of the Design Manual for Segmental Retaining Walls (DMSRW) in 1993 to provide a standardized engineering approach for the analysis and design of conventional and reinforced soil segmental retaining walls (SRWs). The Second Edition of the DMSRW was published in 1997 and the companion NCMA Segmental Retaining Wall Drainage Manual was published in 2002; the latter provided general guidelines for incorporating surface and subsurface drainage details and systems into SRW design and construction to minimize the potential for hydrostatic forces to develop and to provide guidance for including hydrostatic forces when drainage alone will not eliminate the potential for water to load the SRW. The Third Edition of the DMSRW, completed in 2006, incorporates significant changes in the state-of-the-practice regarding MSEW and SRW topics. This paper summarizes these changes and discusses the rational for each. This paper will serve as a useful guide for practioners, particularly those designing with the aid of software based upon the earlier Second Edition of the DMSRW. The paper is directed towards designers and specifiers of the materials and methods used for SRWs.
2 citations
Journal Article•
TL;DR: In this paper, the design of cantilever sheet pile walls involves the evaluation of loads imposed by soil, water, and surcharging was conducted using specialized computer program, and the effect of variation in height, loading, and soil properties on the design was investigated.
Abstract: As society begins to demand greater and more efficient use of underground space, deep excavations are being carried out to meet the surging need for infrastructure in big cities. During excavation, an in situ wall system is often constructed to provide stability and to minimize movements of the adjacent ground. The choice of an appropriate retaining system depends on certain factors such as subsoil characteristics, groundwater condition, and building protection considerations. For some circumstances, steel sheet piling typically provides the most usual solution for the conditions encountered in the field. In order to ensure successful excavation work, the behaviors of the wall must be considered during the design phase. In this paper, the design of cantilever sheet pile walls involves the evaluation of loads imposed by soil, water, and surcharging was conducted using specialized computer program. The effect of variation in height, loading, and soil properties on the design was investigated. This paper is intended to enable the pile selection and penetration to be quickly determined for the certain construction cases of cantilever sheet pile in Baghdad soil. Finally, some simple guidelines to installation method and to prevent failures related to geotechnical works of sheet pile are presented.
2 citations
Cites background from "Foundation analysis and design"
...A cantilevered sheet pile is a wall that derives its support entirely through the interaction with the surrounding soil [4], mentioned that when the wall is under (3 m) in height it is often cantilever....
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...A detailed discussion of various theories is presented in literatures [3]-[4], [8], [21]....
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TL;DR: In this paper, a geotechnical and geophysical investigation of the Hasanbeyli wind turbine area in Turkey is presented, and the results of the laboratory tests and field exploration (borehole, pressuremeter, seismic refraction, point load, unconfined compression) are analyzed to develop geotehnical engineering recommendations and a generalized framework for foundation design and construction of wind turbines.
Abstract: Utilization of wind energy as an alternative energy source has been growing in Turkey due to limited fuels and environmental pollution. An integrated site investigation is crucial as the wind turbines are subjected to strong static and dynamic loads. This study presents a geological, geotechnical, and geophysical investigation of the Hasanbeyli wind turbine area in Turkey. Results of the laboratory tests and field exploration (borehole, pressuremeter, seismic refraction, point load, unconfined compression) were analyzed to develop geotechnical engineering recommendations and a generalized framework for foundation design and construction of wind turbines.
2 citations
01 Jan 2000
TL;DR: In this article, the potential use of whole waste tires in the construction of earth retaining structures is examined and several retaining wall designs that incorporate waste tire as a basic structural unit are proposed.
Abstract: 16, Abstract: Finding secondary applications for used automobile tires has become a major issue because of the unique problems associated with their disposal. The vast majority of these secondary applications involve the use of waste tires in shredded form. Examples include Tire Derived Fuel (TDF) that recover energy through combustion of shredded tires, crumb rubber as a modifier for asphalt binder and asphalt concrete mix, and shredded tire as a lightweight fill material. This research examined the potential use of whole waste tires in the construction of earth retaining structures. Several retaining wall designs that incorporate waste tire as a basic structural unit are proposed. The proposed retaining wall designs involve the use of whole waste tires in a number of different forms. They are (1) whole tires filled with gravel or low strength flowable filler, (2) tires bales that are produced by compressing as many as 100 automobile tires to form a 30in x 50 in x 60 inch blocks and (3) tire bales encapsulated in a concrete casing to produce 4 ft x 4 ft x 8 ft block called Eco-BloC®. The proposed designs include gravity retaining 'walls as well as mechanically stabilized earth (MSE) retaining walls. Necessary analyses have been performed to ensure adequate factor of safety against internal failure as well as external failure of the retaining wall systems. The internal stability conditions that were considered included the following: (a) rupture of the reinforcement, (b) reinforcement pullout and © bulging of the wall. The externals stability conditions included: (a) sliding, (b) bearing failure, (c) overturning, and (d) global rotational stability. The analyses have been repeated for a range of wall heights, wall batter and backfill material properties to produce design charts.
2 citations