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
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TL;DR: In this article, a three-dimensional parametric finite element analysis of the earth pressures on a shoring system used in trench rescue or as a shallow trench bracing was performed.
Abstract: A three-dimensional parametric finite element analysis of the earth pressures on a shoring system used in trench rescue or as a shallow trench bracing was performed. Field monitoring of the deformation of an instrumented, full-scale braced wall section was also undertaken in two shallow trenches, one where the soil was mostly granular in nature and one where the soil was clayey, in order to gauge the effect of soil type on the shoring system performance. The study showed that the most significant effect on earth pressures was the strut loading. It was found that the magnitude and distribution of the soil pressure on shallow trench bracing was significantly different from that determined by the currently accepted one used for braced deep excavations. A method for calculating earth pressures on shallow trench bracing was developed that determines the earth pressures as a function of strut loading. It can be used to determine the maximum strut loading that can be used without causing a passive failur...
5 citations
Cites background from "Foundation analysis and design"
...Bowles (1996) indicated that, if the pressures in back of a braced wall are measured, the pressures will be found to be directly related to the strut forces and have little relation to the actual soil pressures involved in moving the wall into the excavation....
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01 Jul 2008
TL;DR: In this article, the authors used the coefficient of correlation (r2) to compare the PDA and full scale tests and found that the r2 of the correlation of the full scale test vs PDA is 0,3713 for Buttler and Hoy, 0:3784 for Fuller and Hoy; 0,2539 for Chin; and 0,7091 for Mazurkiewicz.
Abstract: PDA (Pile Driving Analysis) method has been used since 1970's. Many geotechnical engineer thought that PDA method could not substitute the pile full scale test. The aim of this research is to assess Qult (ultimate load capacity) obtained from PDA and full scale tests therefore the correlation of Qult of both tests results can be developed. The assessed data was taken from soil investigation's final report of several bored pile of campus building project of (UGM) Gadjah Mada University. The full scale test was interpreted by some methods e.g.: Buttler and Hoy, Fuller and Hoy, Chin, and Mazurkiewicz. The used statistic parameter in comparing of both tests is the coefficient of correlation (r2). After analyzing the data, it is found that the r2 of the correlation of full scale test vs PDA is 0,3713 for Buttler and Hoy; 0,3784 for Fuller and Hoy; 0,2539 for Chin; and 0,7091 for Mazurkiewicz. The conclusion of this research is that the PDA does not ensure the substitution of full scale test since the recorded r2 was mostly low. Among the full scale interpretation method, only the Mazurkiewicz records the Qult that closed to the PDA result
5 citations
09 Jun 2013
TL;DR: In this paper, the current offshore foundation practice, the BAUER technology for on-shore pile installation by drilling, and a new technology for supporting offshore pile installation when refusal is prematurely reached by means of the Dive Drill.
Abstract: Offshore piles are normally installed by driving using over-water or underwater hammers. However, there are many situations where pile reaches refusal before the installation depth. This paper briefly describes the current offshore foundation practice, the BAUER technology for onshore pile installation by drilling, the BAUER experiences in the offshore foundation and geotechnical fields and a new technology for supporting offshore pile installation when refusal is prematurely reached by means of the Dive Drill.Copyright © 2013 by ASME
5 citations
Journal Article•
TL;DR: A review of excavation support systems available worldwide and to survey the current state of practice in the local area (Nablus - Palestine), including available types, reasons for failure, and methods of design and construction as mentioned in this paper.
Abstract: Excavations of soil and rock are one of the most important elements in laying the subsurface structures. These excavations usually require excavation support systems that have fundamental influence on the safety, profitability, speed and quality of construction projects. Despite the great importance of the support systems, most designers and contractors know very little about their design and construction and they rely heavily on experience. The goal of this paper is to present a review of excavation support systems available worldwide and to survey the current state of practice in the local area (Nablus - Palestine), including available types, reasons for failure, and methods of design and construction of excavation support systems. This paper also suggested new techniques that may be adopted locally as an excavation support system. Conclusions of this study are presented and recommendations are suggested to identify what research and development should be carried out to improve the process of design and construction of excavation support systems.
5 citations
TL;DR: In this article, the authors used a series of finite element models (FEMs) of a three-story RC building to obtain the frequencies and damping ratios, taking into account soil-structure interaction.
Abstract: Summary
This paper presents system identification and numerical analyses of a three-story RC building. System identification was performed using 50 earthquake response records to obtain the frequencies and damping ratios, taking into account soil–structure interaction. Trends in the resonant parameters were correlated with the peak response accelerations at the roof level. A general trend of decreasing resonant frequencies with increasing level of response was observed and quantified, whereas for the damping ratios, no clear trends were discernible. A series of finite element models (FEMs) of the building were updated using a sensitivity-based method with a Bayesian parameter estimation technique to follow the changes in the resonant frequencies with response amplitude. The FEMs were calibrated by tuning the stiffness of structural and non-structural components and soil. The updated FEMs were used in time history analyses to predict and assess the building seismic performance at the serviceability limit state. It was concluded that the resonant frequencies depend strongly on the response magnitude, even for low-to-moderate levels of shaking. The structural and non-structural components and soil make contributions to the overall building stiffness that depends on the level of shaking. The FEM calibrated to the largest responses was the least conservative in predicting the serviceability limit state inter-story drifts, but the building performed satisfactorily. Copyright © 2015 John Wiley & Sons, Ltd.
5 citations