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You searched for subject:(Excavation waste). Showing records 1 – 3 of 3 total matches.

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University of Wolverhampton

1. Adjei, Solomon D. REVIEW OF WASTE MANAGEMENT IN THE UK CONSTRUCTION INDUSTRY.

Degree: 2016, University of Wolverhampton

The construction industry is considered the world over as a major contributor to the high rates of waste generation in developed countries. The negative influence of waste generation on the environment, natural resources, and the profitability of firms puts increasing pressure on the industry to reduce the waste it generates. The pressures to reduce waste are heightened by current trends demanding sustainable management of waste for the purposes of economic, social, and environmental gains. Literature on factors influencing waste management (WM) suggests government legislation is the most critical success factor for ensuring waste is sustainably managed. A review of the literature however indicated that researches holistically investigating the practices of construction firms and the extent to which these practices meet the intended outcomes of government legislation on waste are not present. Thus this research was undertaken to holistically investigate WM practices in the UK construction industry, to identify best practices and the extent to which they meet the intended outcomes of government WM legislation ad policy. The study adopted a multiple case study design to examine WM approaches, strategies and practices at both the corporate and project level within construction companies. Four construction companies who had won awards for their sustainability and environmental performance were purposefully selected to investigate best practice WM. Data was collected through semi-structured interviews, passive observations, and documentary analysis. Analysis of the data revealed that the drivers for WM in the construction industry are: economic considerations; company sustainability agenda; company image; client requirements; environmental concerns; government legislation; moral and social demands; industrial benchmarking; environmental concerns; and the requirements of standards. Regarding the influence of legislation, the results revealed that government legislation plays a secondary role in influencing WM as clients are interested in using only compliant firms. Best practices targeting design to reduce waste through standardisation and prefabrication; on-site segregation through multi-skip provision; supply take back schemes; intensified site education; and the use of incentives were identified to lead to improved WM. The results also indicated that company sustainability agenda is the most influential driver for achieving sustainable construction, demolition and excavation (CD&E) WM. The findings highlighted the importance of having a clear vision and structure for WM at the corporate level alongside strategies to be implemented on projects to ensure sustainable WM is achieved. To help construction firms in achieving sustainable WM, which is the ultimate goal of government legislation, a best practice framework has been developed based on the findings from the study and evaluated using semi-structured interviews with selected target participants. The framework presents a coherent and systematic approach for achieving…

Subjects/Keywords: Waste Management; Construction Waste; Demolition Waste; UK Waste Legislation; Excavation waste; Sustainability; Environmental Management; Waste Management Framework; Waste Management Drivers

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Adjei, S. D. (2016). REVIEW OF WASTE MANAGEMENT IN THE UK CONSTRUCTION INDUSTRY. (Thesis). University of Wolverhampton. Retrieved from http://hdl.handle.net/2436/618541

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Adjei, Solomon D. “REVIEW OF WASTE MANAGEMENT IN THE UK CONSTRUCTION INDUSTRY.” 2016. Thesis, University of Wolverhampton. Accessed October 15, 2019. http://hdl.handle.net/2436/618541.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Adjei, Solomon D. “REVIEW OF WASTE MANAGEMENT IN THE UK CONSTRUCTION INDUSTRY.” 2016. Web. 15 Oct 2019.

Vancouver:

Adjei SD. REVIEW OF WASTE MANAGEMENT IN THE UK CONSTRUCTION INDUSTRY. [Internet] [Thesis]. University of Wolverhampton; 2016. [cited 2019 Oct 15]. Available from: http://hdl.handle.net/2436/618541.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Adjei SD. REVIEW OF WASTE MANAGEMENT IN THE UK CONSTRUCTION INDUSTRY. [Thesis]. University of Wolverhampton; 2016. Available from: http://hdl.handle.net/2436/618541

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

2. Plassart, Roland. Modélisation hydromécanique du comportement des ouvrages souterrains avec un modèle élastoviscoplastique : Hydromechanical modelling of underground excavations with an elastoviscoplastic behaviour law.

Degree: Docteur es, Mécanique - Génie civil, 2011, Lorraine INP

Le comportement à long terme des excavations souterraines est un enjeu social et économique majeur, en particulier dans le contexte du stockage en formation géologique profonde de déchets nucléaires à Haute Activité et Vie Longue (HAVL). Plusieurs galeries expérimentales ont été creusées dans le laboratoire de recherche souterrain de Meuse/Haute-Marne situé près de Bure en France, où des études sont menées pour comprendre le comportement global de la roche constitutive : l’argilite du Callovo-Oxfordien (COx).L’objectif de cette thèse est d’effectuer une modélisation avec Code_Aster d’ouvrages souterrains, et en particulier d’une des galeries du laboratoire de Meuse/Haute-Marne, en prenant en compte une approche non locale, l’effet du fluage et le couplage hydromécanique dans le cadre de la mécanique des milieux poreux, et de comparer les résultats numériques avec les données expérimentales disponibles.Le modèle élastoviscoplastique spécifiquement utilisé pour cette étude est le modèle L&K : il offre d’une part un couplage entre le comportement instantané et différé, et prend en compte d’autre part la dilatance, paramètre qui gouverne les déformations volumiques du matériau lors d’une sollicitation, et ses fortes variations, caractéristique essentielle des géomatériaux et en particulier du COx. La présence d’un fluide s’écoulant à travers le matériau va ajouter une composante hydraulique à la modélisation, dont le couplage avec la mécanique est assuré par les équations de Biot. Une autre nouveauté de ce travail concerne le couplage entre ce comportement rhéologique complexe et une approche non locale dans un cadre industriel. Parmi les méthodes de régularisation disponibles dans Code_Aster, la méthode second gradient de dilatation a été choisie parce que bien adaptée aux géomatériaux. Son but est de corriger la dépendance au maillage et les solutions numériques localisées.Une fois les outils numériques opérationnels et les paramètres du modèle L&K calés sur des essais effectués en laboratoire sur des échantillons, un bon accord général a été trouvé entre les résultats numériques et les mesures in situ, sans aucun recalage des paramètres. Les effets du temps observés expérimentalement sur l’évolution des déplacements et des pressions d’eau sont retrouvés au sein d’une même modélisation, validant ainsi la démarche prédictive suivie

The long term behaviour of underground excavations is a social and economic stake, in particular in the context of storage in deep geological formation of high activity and long life nuclear waste. Several experimental galleries have been dug in the underground research laboratory (URL) of Meuse/Haute-Marne located close to Bure in France, where studies are leaded in order to understand the global behaviour of the constitutive rock which is the Callovo-Oxfordian (COx) argillite.The purpose of this PhD Thesis is to establish a modelling with Code_Aster of underground excavations, and especially of a Meuse/Haute-Marne laboratory gallery, taking into account non local approach, creep effect…

Advisors/Committee Members: Giraud, Albert (thesis director), Hoxha, Dashnor (thesis director).

Subjects/Keywords: Elastoviscoplasticité; Radoucissement; Dilatance; Modèle second gradient; Couplage hydromécanique; Excavation souterraine; Stockage de déchets nucléaires; Elastoviscoplasticity; Softening; Dilation; Second gradient model; Hydro-mechanical coupling; Underground excavation; Nuclear waste storage; 624.19; 628.445 66

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Plassart, R. (2011). Modélisation hydromécanique du comportement des ouvrages souterrains avec un modèle élastoviscoplastique : Hydromechanical modelling of underground excavations with an elastoviscoplastic behaviour law. (Doctoral Dissertation). Lorraine INP. Retrieved from http://www.theses.fr/2011INPL050N

Chicago Manual of Style (16th Edition):

Plassart, Roland. “Modélisation hydromécanique du comportement des ouvrages souterrains avec un modèle élastoviscoplastique : Hydromechanical modelling of underground excavations with an elastoviscoplastic behaviour law.” 2011. Doctoral Dissertation, Lorraine INP. Accessed October 15, 2019. http://www.theses.fr/2011INPL050N.

MLA Handbook (7th Edition):

Plassart, Roland. “Modélisation hydromécanique du comportement des ouvrages souterrains avec un modèle élastoviscoplastique : Hydromechanical modelling of underground excavations with an elastoviscoplastic behaviour law.” 2011. Web. 15 Oct 2019.

Vancouver:

Plassart R. Modélisation hydromécanique du comportement des ouvrages souterrains avec un modèle élastoviscoplastique : Hydromechanical modelling of underground excavations with an elastoviscoplastic behaviour law. [Internet] [Doctoral dissertation]. Lorraine INP; 2011. [cited 2019 Oct 15]. Available from: http://www.theses.fr/2011INPL050N.

Council of Science Editors:

Plassart R. Modélisation hydromécanique du comportement des ouvrages souterrains avec un modèle élastoviscoplastique : Hydromechanical modelling of underground excavations with an elastoviscoplastic behaviour law. [Doctoral Dissertation]. Lorraine INP; 2011. Available from: http://www.theses.fr/2011INPL050N


EPFL

3. Parisio, Francesco. Constitutive and numerical modeling of anisotropic quasi-brittle shales.

Degree: 2016, EPFL

Understanding the hydro-mechanical behavior of shale is fundamental to assess the safety of deep geological nuclear repository sites. Several countries have adopted argillaceous formations as host geological media for the repository. In Switzerland, the candidate for hosting the deep geological repository site is Opalinus Clay. This thesis aims at improving the current predicting and modeling capabilities of the hydro-mechanical behavior of shale by: (1) developing proper constitutive models; (2) validating the developed models against experimental findings. First, thermo-hydro-mechanical (THM) couplings at the constitutive level are addressed. A constitutive model that accounts for suction and temperature dependent failure is presented. Additionally, the model accounts for the true triaxial nature of strength. Numerical results showed that not accounting for true triaxial strength of geomaterials in unsaturated and non-isothermal conditions can lead to an overestimation of its strength. Then, a new constitutive model combining damage and plasticity theory for quasi-brittle geomaterials is developed. Comparison between numerical results at material point level and experimental results in triaxial compression tests show good agreement. The constitutive model is furtherly developed and modified to improve the calibration scheme and to represent a wider range of confinements. The new constitutive model is implemented with an implicit scheme in the Finite Element solver Code_Aster. Validation examples give good results and the model proves to be a powerful tool to describe the hydro-mechanical behavior of shale. The developed constitutive model is furtherly extended to account for anisotropy and true triaxial strength, both typical features of shale. Both extensions are compared separately against experimental data on several materials. The performance of the constitutive model in terms of failure stress predictions is compared to other failure criteria common in geomechanics. Results demonstrate how the proposed model gives a global smaller error between predictions and data compared to the other criteria. To avoid pathological mesh dependency, the Finite Element analyses must be carried out with a proper regularization technique. The one employed in this study is the second gradient of dilatancy formulation, which was available in Code_Aster. A series of numerical examples are presented to highlight the main characteristics of the structural response of the proposed constitutive model in combination with a second gradient of dilatancy formulation. Results demonstrate how the parameter controlling the non-associated plastic potential, the softening response, the anisotropic failure surface and the size of the problem play a major role in the final solution in presence of localized inelastic strains. Results show as well that the pathological mesh dependency is removed. A Finite Element analysis of tunnel excavation in coupled hydro-mechanical conditions is presented. The developed anisotropic plastic-damage model is… Advisors/Committee Members: Laloui, Lyesse.

Subjects/Keywords: thermo-hydro-mechanical couplings; nuclear waste storage; shale mechanics; the Mont Terri Project; plasticity and damage couplings; Code_Aster; anisotropic plasticity; localization; Excavation Damaged Zone (EDZ); Opalinus Clay

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Parisio, F. (2016). Constitutive and numerical modeling of anisotropic quasi-brittle shales. (Thesis). EPFL. Retrieved from http://infoscience.epfl.ch/record/219006

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Parisio, Francesco. “Constitutive and numerical modeling of anisotropic quasi-brittle shales.” 2016. Thesis, EPFL. Accessed October 15, 2019. http://infoscience.epfl.ch/record/219006.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Parisio, Francesco. “Constitutive and numerical modeling of anisotropic quasi-brittle shales.” 2016. Web. 15 Oct 2019.

Vancouver:

Parisio F. Constitutive and numerical modeling of anisotropic quasi-brittle shales. [Internet] [Thesis]. EPFL; 2016. [cited 2019 Oct 15]. Available from: http://infoscience.epfl.ch/record/219006.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Parisio F. Constitutive and numerical modeling of anisotropic quasi-brittle shales. [Thesis]. EPFL; 2016. Available from: http://infoscience.epfl.ch/record/219006

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

.