Here the deck comprises of an extension of the buttress itself and for stability the whole section behaves as one monolith. The dam is thus made of a series of a series of buttress with massive heads placed side by side, each being an independent structural unit. The construction of this type was first proposed by F.A. Noetzli for Don Marlin dam Mexico in 1925. The massive head buttress dams can be further sub-classified as below
Round head buttress dam
This is the most popular; notable example being Don Martin dam Mexico, Laurasten dam Australia, Elmali dam Turkey, etc. shoe round head buttress dam The shape of the round head should be such that the water pressure is transmitted to buttress in pure compression. Two copper seals with an asphalt seal in-between are provided at the contact of two adjacent massive heads. Vertical drains are formed in the head to arrest seepage and reduce uplift.
In 1948 E. Reinus showed that the pore pressure within an undrained buttress head could act laterally and induce considerable horizontal tensile stress at the face of the round head. To minimize this, the water stop should be lacated well downstream in the joint. Drains can also be provided within the head as at the 83 m high Giovertto dam, Italy (1956)
Here the deck comprises of an extension of the buttress itself and for stability the whole section behaves as one monolith. The dam is thus made of a series of a series of buttress with massive heads placed side by side, each being an independent structural unit. The construction of this type was first proposed by F.A. Noetzli for Don Marlin dam Mexico in 1925. The massive head buttress dams can be further sub-classified as below
Round head buttress dam
This is the most popular; notable example being Don Martin dam Mexico, Laurasten dam Australia, Elmali dam Turkey, etc. shoe round head buttress dam The shape of the round head should be such that the water pressure is transmitted to buttress in pure compression. Two copper seals with an asphalt seal in-between are provided at the contact of two adjacent massive heads. Vertical drains are formed in the head to arrest seepage and reduce uplift.
In 1948 E. Reinus showed that the pore pressure within an undrained buttress head could act laterally and induce considerable horizontal tensile stress at the face of the round head. To minimize this, the water stop should be lacated well downstream in the joint. Drains can also be provided within the head as at the 83 m high Giovertto dam, Italy (1956)
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