| Popis: |
Slope reparation in disintegrated and surface-altered rock mass is a frequently occurring problem in engineering practice. A high-quality solution requires engineering-geological mapping of the current state, a detailed slope stability inspection, as well preparing a reparation project. In this paper, the authors have proposed a design and construction model for repairing the altered and unstable rock mass. The project design is based on field and laboratory investigations regarding the state of the rock mass and its discontinuities, establishing the failure criteria along with the estimations regarding the strength and deformability of the rock mass and the condition of discontinuities required for geostatic analysis, as well as based on a repair proposal. The paper proposes a rock slope repairing principle and technology, which can serve as a model for resolving similar cases in practice. The aim and the basic strategy of this reparation are to prevent the potentially unstable parts of slope from moving and to reduce and neutralize the undesirable engineering geological processes affecting the further disintegration of rocks. A detailed description of methodology is provided for classifying and determining the parameters of strength and deformability of the rock mass. The model is illustrated with a specific example (case study), describing all phases that precede the phases of design and construction. The authors used the example of repairing the support slope of the 'Modrac' dam (Bosnia and Herzegovina), consisting of serpentine rocks of different degrees of alteration. The practical application of the proposed model may be useful also in solving similar problems. |
