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Accueil du site → Doctorat → Autriche → Suitability of vegetated wooden/bamboo crib walls for slope stabilisation

Universität für Bodenkultur Wien (2007)

Suitability of vegetated wooden/bamboo crib walls for slope stabilisation

Acharya, Madhu Sudan

Titre : Suitability of vegetated wooden/bamboo crib walls for slope stabilisation

Auteur : Acharya, Madhu Sudan

Akad. Grad : Dr. nat. techn. Wien, Univ. für Bodenkultur, Diss., 2007

Université de soutenance : Universität für Bodenkultur Wien | Department für Bautechnik und Naturgefahren | Arbeitsbereich Ingenieurbiologie des Institutes für Landschaftsplanung und Ingenieurbiologie

Résumé
Retaining structures for slope stabilisation are usually made of concrete and steel or alternatively with the help of revetments, anchors, reinforced earths etc. In many developing countries, however, factors like accessibility, affordability and sustainability of technology influence the selection of alternatives to solve geotechnical problems in infrastructure development. With this situation in mind, the present work is focused on the use of locally available plant material in the form of vegetated crib retaining wall for slope stabilisation and slope/embankment protection. In this thesis, the suitability of the vegetative crib wall made of wood or bamboo is investigated. The assessment of the suitability of vegetative wooden/bamboo crib wall is made based on the strength, durability, cost effectiveness, sustainability and environmental aspects of such construction. The stability analysis of a typical vegetative crib wall at the initial stage of construction is carried out using the theory of soil mechanics. For the dimensioning of such structures, analytical calculations are made and the results are compared with the standard norms for a required level of safety and serviceability. The strength and deformation behaviours of such construction are observed through load tests and centrifuge tests on model crib walls. Indirect methods are used to assess the effects of plants on the slope. In order to gain some insights into the mechanical effects of plants on the soil, pullout tests on some willow plants are carried out. To analyse the hydrological effects of inserted plants on the slope, soil moisture and pore water pressure behind a vegetated wooden crib wall are measured. In addition, the performances of vegetated bamboo crib retaining walls constructed in Nepal are evaluated. The strength behaviour of vegetative crib walls over time, the effects of the plants on the shear strength of soil and the possible scenarios of the vegetated slope after the decay of crib elements are also explained in this thesis. The results of analysis, test, measurement and observation are discussed in detail and also compared with similar works in the past. A comparison of the cost of vegetative crib walls with other walls is also made. The social, environmental and the sustainability aspects of the vegetative crib wall in general and bamboo crib wall in particular, are also discussed. The result shows that if designed, constructed and maintained properly, the vegetative crib wall could be an attractive alternative to conventional gabion or stone masonry retaining wall

Mots clé :
Ingenieurbiologie / bepflanzte Holz-, Bambuskrainerwände / Hang-, Böschungssicherung
vegetated wooden crib wall / bamboo crib wall / slope stabilisation / crib retaining structures / soil bioengineering walls

Présentation : Österreichische Dissertationsdatenbank

Page publiée le 3 mars 2008, mise à jour le 13 mars 2019