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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01 Jan 2010
TL;DR: In this article, the finite element method is utilized as a tool for carrying out different analyses of stone column-soil systems under different conditions, and a trial is made to improve the behavior of stone columns by encasing the stone column by geogrid as reinforcement material.
Abstract: ABSTRACT:In this paper, the finite element method is utilized as a tool for carrying out different analyses of stone column–soil systems under different conditions. A trial is made to improve the behaviour of stone column by encasing the stone column by geogrid as reinforcement material . The program CRISP2D is used in the analysis of problems. The program adopts the finite element method and allows prediction to be made of soil deformations considering Mohr–Coulomb failure criterion for elastic-plastic soil behaviour.
3 citations
29 May 2017
TL;DR: In this article, a case study of the Volterra area in Tuscany region (Italy), which covers about 20 km2 and is extensively affected by diffuse slope instability, is presented, where the spatial distribution and types of the landslides are studied on the basis of the geological and geomorphological setting coupled with a geotechnical monitoring.
Abstract: This paper aims to detecting terrain movements in landslide-affected and landslide-prone zones and their damaging effects on the urban fabric. The case study is the Volterra area in Tuscany region (Italy), covers about 20 km2 and is extensively affected by diffuse slope instability. Firstly, the spatial distribution and types of the landslides were studied on the basis of the geological and geomorphological setting coupled with a geotechnical monitoring. Secondly, satellite SAR (Synthetic Aperture Radar) images acquired by ENVISAT and COSMO-SkyMed sensors respectively in 2003–2009 and 2010–2015 and processed with Persistent Scatterer Interferometry (PSI) techniques, were exploited. In particular, these satellite radar data combined with thematic data and in situ field surveys allowed the improvement of the geometric and kinematic characterization of landslides, as well as allowing a deformation and damage assessment to be undertaken on built-up zones. The classification of damage degree and building deformation velocity maps of the study area were also evaluated through PSI displacement rates. Furthermore, as a single building-scale analysis, maximum differential settlement parameters of some sample buildings were derived from radar measurements, and then cross-compared with constructive features, geomorphological conditions and with field evidences of known landslide areas. This work allowed the correlation of landslide movements and their effects on the urban fabric and provided a useful stability analysis within future risk mitigation strategies.
3 citations
01 Jan 2014
TL;DR: In this paper, a dynamic analysis of strip machine foundation with multiple thicknesses is placed at the middle of the top surface of saturated sand with different states (i.e. loose, medium and dense), and vertical harmonic excitation is carried out and building up of the excess pore water pressure.
Abstract: The behavior of machine foundation on saturated porous medium can be considered as a complicated geotechnical problem due to nature of dynamic loads and plasticity of soil which make the analysis and design of foundation subjected to dynamic loads more complex. The main criteria for safe performance of machine foundations subjected to dynamic loads are to control excessive displacements. In this paper, a dynamic analysis of strip machine foundation with multiple thicknesses is placed at the middle of the top surface of saturated sand with different states (i.e. loose, medium and dense), and vertical harmonic excitation is carried out and building up of the excess pore water pressure. The dynamic analysis is performed numerically by using finite element software, PLAXIS 2D. The soil is assumed as elastic perfectly plastic material obeys Mohr-Coulomb yield criterion. A parametric study is carried out to evaluate the dependency of machine foundation on various parameters including the amplitude and the frequency of the dynamic load. The dynamic response (displacement and excess pore water pressure) generally increases with increasing of loading amplitude, but the displacement and excess pore water pressure versus frequency are not smooth and exhibit undulations (peaks and troughs).
3 citations
Cites background or methods from "Foundation analysis and design"
...The soil deposit is assumed to obey the advanced Mohr-Coulomb yield criterion, with parameters adopted from Bowles (1996) and Murthy (2006) except the dilatancy parameter....
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...Figure (4) - Effect of foundation mass for embedded foundation subjected to vertical loads (after Spyrakos and Xu, 2004)....
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...For embedded foundations, the normalized dynamic compliances for vertical loads are drawn in Figure (4)....
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Dissertation•
01 Jan 2015
TL;DR: In this paper, an environmentally friendly and yet cost effective method for soft ground construction has been introduced, in view of the existing soft ground problems and the ineffectiveness and uneconomical of methods available.
Abstract: Soft ground construction has been on the use as soft clay is often found throughout the coastal plains of Malaysia, East and West alike, where many of these areas are under development for urbanization pressure. However, soft clay construction has always been a challenge for geotechnical engineers as soft ground will undoubtedly pose stability and settlement problems for the structures built over it. Since soft ground are almost found everywhere across the world, its importance has long been noticed by civil engineers since long ago, and according by many solutions have been devised and deployed to counter such issues. However, unfortunately, many of the existing solutions are either too sophisticated or costly to be implemented. Thus, in view of the existing soft ground problems and the ineffectiveness and uneconomical of methods available, an environmentally friendly and yet costeffective method is introduced. Bamboo-geotextile composite (BGC) system a.k.a. Geobamtile system has to date been deployed successfully in several projects in Malaysia and her neighbouring countries and recorded satisfactory performance so far. For completeness, the theories for good understanding on the behaviour of such system, so that it can be justified to be a well-developed solution based on sound engineering. This indeed constitutes the core of this investigation to provide a theoretical background for such system. Being a structure-soil interaction problem, literature reviews are carried out in this direction. For general, it is known that in a common foundation problem,
3 citations
TL;DR: In this article, a series of nondestructive tests (NDT) were carried out by the authors in order to obtain information on the state of conservation of the building and to assess its structural behavior.
3 citations