Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Bearing capacity of shallow and deep foundations on rock mass : analytical and experimental investigations
It is well known that, except for potential installation problems, most rock masses are excellent and trouble-free foundation materials. A significant economy can be therefore realized in design if the foundation can be constructed on or in the surface or near-surface rock. Nevertheless, the construction of challenging structures with usually high loads and special requirements on rock foundations, have made it necessary to determine the bearing capacity of rock media accurately. It is within this framework that the present research was carried out. This dissertation provided analytical solutions for bearing capacity problems of both shallow and deep foundations resting on or in a rock mass that obeys the Hoek and Brown failure criterion. Considering the strip footing problem, improvements were brought by incorporating a non-associated flow rule in the plane strain upper bound limit analysis technique and analysing its effects on failure mechanisms and bearing capacity values. By assuming a rigid strip footing resting on a rock mass obeying the generalized Hoek and Brown failure criterion, the upper bound estimate for the bearing capacity was derived by preserving exactly the original nonlinear criterion. The multi tangential method was used to handle non-linear strength criterion issues. Furthermore, a sufficiently significant but conveniently simple formulation of a non-constant dilatancy angle model was derived. Closed-form expressions of the maximum resistance work rate were developed in any virtual velocity field. For practical purposes in rock engineering, tables and charts allowing easy and accurate estimates of the bearing capacity factor 𝑁𝜎0 were provided. The effect of the flow rule on 𝑁𝜎0 was carefully examined using different dilatancy parameters. To investigate the efficiency of the proposed solution, a series of static penetration tests of small-scale model footings (strip and circular) laying on a highly porous calcarenite rock mass was conducted. A reduction factor 𝐹𝑟 defined as the ratio of the ...
Bearing capacity of shallow and deep foundations on rock mass : analytical and experimental investigations
It is well known that, except for potential installation problems, most rock masses are excellent and trouble-free foundation materials. A significant economy can be therefore realized in design if the foundation can be constructed on or in the surface or near-surface rock. Nevertheless, the construction of challenging structures with usually high loads and special requirements on rock foundations, have made it necessary to determine the bearing capacity of rock media accurately. It is within this framework that the present research was carried out. This dissertation provided analytical solutions for bearing capacity problems of both shallow and deep foundations resting on or in a rock mass that obeys the Hoek and Brown failure criterion. Considering the strip footing problem, improvements were brought by incorporating a non-associated flow rule in the plane strain upper bound limit analysis technique and analysing its effects on failure mechanisms and bearing capacity values. By assuming a rigid strip footing resting on a rock mass obeying the generalized Hoek and Brown failure criterion, the upper bound estimate for the bearing capacity was derived by preserving exactly the original nonlinear criterion. The multi tangential method was used to handle non-linear strength criterion issues. Furthermore, a sufficiently significant but conveniently simple formulation of a non-constant dilatancy angle model was derived. Closed-form expressions of the maximum resistance work rate were developed in any virtual velocity field. For practical purposes in rock engineering, tables and charts allowing easy and accurate estimates of the bearing capacity factor 𝑁𝜎0 were provided. The effect of the flow rule on 𝑁𝜎0 was carefully examined using different dilatancy parameters. To investigate the efficiency of the proposed solution, a series of static penetration tests of small-scale model footings (strip and circular) laying on a highly porous calcarenite rock mass was conducted. A reduction factor 𝐹𝑟 defined as the ratio of the ...
Bearing capacity of shallow and deep foundations on rock mass : analytical and experimental investigations
01.01.2021
Hochschulschrift
Elektronische Ressource
Englisch
Ultimate Bearing Capacity of Shallow Foundations on Jointed Rock Mass
| Online Contents | 2012
Ultimate Bearing Capacity of Shallow Foundations on Jointed Rock Mass
| Springer Verlag | 2012
Modeling of Ultimate Bearing Capacity of Shallow Foundations resting on Jointed Rock Mass
| Online Contents | 2013
Modeling of Ultimate Bearing Capacity of Shallow Foundations resting on Jointed Rock Mass
| Springer Verlag | 2013
Bearing Capacity of Shallow Foundations
| British Library Online Contents | 1997