DAM FOUNDATIONS - Pennsylvania State University
DAM FOUNDATIONS. Concrete dams are constructed on rock foundations because of their enormous weight. Rock foundations have a very large load bearing capacity, resist erosion, and reduce permeability. A soil with a high permeability allows water to flow underneath the dam. With a strong foundation there are no height restrictions of RCC dams.
Stability of the dam foundation and other geologic features …
Improper foundation preparation resulting from a lack of geologic consideration can lead to dam failure by a variety of modes including differential settlement, slope instability, sliding, uplift pressures, uncontrolled foundation seepage, internal erosion, shearing, and faulting.
DFED – DAM Foundation for Economic Development
DAM Foundation for Economic Development [An Institution of Dhaka Ahsania Mission]
Fractures and resultant seepage problems in embankment dams may be caused by irregularities in the foundation such as stepped surfaces, abrupt changes in slope, and excessively steep surfaces. Embankment zones may differentially settle adjacent to these areas, resulting in cracks.
Soil Foundations - ASDSO Dam Safety Toolbox
Proper foundation design and construction measures, such as soil compaction, consolidation, and drainage systems, are essential for maintaining the stability and integrity of the dam. Continuous monitoring and maintenance of the soil foundation are …
Rock Foundations - ASDSO Dam Safety Toolbox
A stable foundation ensures that the dam can safely resist external forces, including water pressures, seismic loads, and changes in reservoir water levels. The rock foundation also provides resistance against the potential for slope instability, uplift forces, and deformation.
Grouting of foundation rock with the concrete dam is done for two reasons, one is to create a barrier to seepage through the joints of the rock and the other is to consolidate the bed rock to improve its bearing capacity.
Foundation Mapping - ASDSO Dam Safety Toolbox
Foundation mapping aims to understand both the geological and geotechnical characteristics of the site where a dam will be constructed. It involves the collection and analysis of data on the composition, structure, and properties of the underlying bedrock.
A foundation is considered to be of intermediate depth when the distance to the impervious layer is too great for a cutoff trench, but can be economically reached by another type of positive cutoff. Whether or not a positive cutoff is economical depends heavily on three items:
Foundation Treatment in Dams | PDF | Dam | Fault (Geology)
The document discusses foundation preparation and treatment for dams. It describes types of dams including gravity, embankment, arch, and buttress dams. It then discusses causes of dam failure such as overtopping and foundation issues.