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Rock mass characterisation of Wadi Mujib dam site, Central Jordan
Abstract This paper assesses the rock mass characterisation of the dam site and reservoir area of Wadi Mujib in central Jordan by means of the rock mass classification systems rock mass rating (RMR) and the Barton tunnelling index (Q). The linear relationships between the RMR and Q ratings obtained from both borecores and scanlines are quite similar and indicate good correlation. The results obtained showed that the foundation rocks are of good geomechanical quality, whereas the geomechanical quality of the rock masses constituting the dam abutments exhibit fair quality. The improvement of rock mass quality towards the foundation area was also proved by a seismic refraction survey, which indicated that the foundation rocks are characterised by high longitudinal velocities compared with the dam abutment rocks. Therefore, the foundation rocks are favourable for the construction of both concrete gravity and fill type dams. However, based on the rock mass conditions of the dam abutments and, in addition, other factors that affect the selection of the dam type (such as seismicity) it would be preferable to construct a rockfill dam, due not only to the aforementioned conditions but also to the availability of construction material around the dam site.
Rock mass characterisation of Wadi Mujib dam site, Central Jordan
Abstract This paper assesses the rock mass characterisation of the dam site and reservoir area of Wadi Mujib in central Jordan by means of the rock mass classification systems rock mass rating (RMR) and the Barton tunnelling index (Q). The linear relationships between the RMR and Q ratings obtained from both borecores and scanlines are quite similar and indicate good correlation. The results obtained showed that the foundation rocks are of good geomechanical quality, whereas the geomechanical quality of the rock masses constituting the dam abutments exhibit fair quality. The improvement of rock mass quality towards the foundation area was also proved by a seismic refraction survey, which indicated that the foundation rocks are characterised by high longitudinal velocities compared with the dam abutment rocks. Therefore, the foundation rocks are favourable for the construction of both concrete gravity and fill type dams. However, based on the rock mass conditions of the dam abutments and, in addition, other factors that affect the selection of the dam type (such as seismicity) it would be preferable to construct a rockfill dam, due not only to the aforementioned conditions but also to the availability of construction material around the dam site.
Rock mass characterisation of Wadi Mujib dam site, Central Jordan
El-Naqa, Ali (author)
Engineering Geology ; 38 ; 81-93
1994-06-21
13 pages
Article (Journal)
Electronic Resource
English
Rock mass characterisation of Wadi Mujib dam site, Central Jordan
| Tema Archive | 1994
Rock mass characterisation of Wadi Mujib dam site, Central Jordan
| Online Contents | 1994
Rock mass characterisation of Wadi Mujib dam site, Central Jordan
| British Library Online Contents | 1994