International Commission on Irrigation & Drainage Commission Interationale des Irrigation et du Drainage

Multilingual Technical Dictionary (MTD)
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Term No.Term Name/Term DescriptionAction
2255
Fixed buttress weir, Ambursen dam or Ambursen weir
A fixed dam consisting of water-supporting upstream face supported by buttresses which are equally spaced walls or struts proportioned to transmit the water load and the weight of the structure, to the foundations. Note - It is classified as open or closed Ambursen weir according to the absence or provision of downstream face slab.(originated by Sw.....
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2337
Buttress dam
A dam usually of reinforced concrete, consisting of upstream face or deck and buttresses. The water bearing members (upstream face or deck) are supported upon the buttresses and span between them. The load is tranferred to the foundations through the buttresses......
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2338
Buttress
A masonry or concrete pier built normal to a face or a wall while the retained material resists the pressure transmitted by the wall or face......
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2339
Single wall buttress
A buttress of solid section. It may have (a) uniform thick section, (b) (i) thin section reinforced by stiffeners for lateral stability, (ii) thin section reinforced by struts between the adjacent buttresses for lateral stability......
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2340
Double wall buttress, or Hollow buttress
A buttress made of thin concrete sections duly stiffened in between by stiffeners.
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2341
Flat slab buttress dam, Flat deck dam, Deck dam, Slab and buttress dam, ,Fixed slab buttress dam, Fixed deck dam, Free deck dam, or Cantilever buttress dam
A dam usually of reinforced concrete consisting essentially of slabs supported by transverse buttresses. The load is taken by the slabs and transferred to the foundations through the buttresses. The slab may be (i) integrally cast with the buttresses, (ii) freely supported at the buttresses, or (iii) cantilevered from the buttresses. The dams are a.....
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2342
Truss buttress dam
A type of deck dam where the massive buttresses are replaced by reinforced concrete trusses to support the deck slab.
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2343
Columnar buttress dam
A type of deck dam when the massive buttresses are replaced by a series of inclined columns.
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2344
Multiple arch-buttress dam
A type of buttress dam, consisting of a series of arch barrel segments supported by buttresses. The load is transferred by the several arches to the foundations through the buttresses......
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2345
Deckless buttress dam, Massive head buttress dam
A type of buttress dam when the face slab is replaced by flaring the upstream edges of the buttresses to span the distance between buttress walls. The flaring portion of the buttress (head) may be of various geometrical shapes, viz. (i) massive head, (ii) round head or mushroom head, (iii) diamond head. The buttress dams comprising types of head cl.....
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2346
Multiple dome buttress dam
A modification of a multiple arch dam, with a large dome-shaped structure between the buttresses (illustrated).
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2504
Cutoff buttress
Cross wall projecting into the embankment from spillway abutments or power-house wall or other concrete wall extending through the structure in upstream and downstream directions......
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2578
Unit column method (for buttress dam)
It is a method of designing a buttress dam evolved by Herman Shorer. It is assumed that the buttress comprises a series of hypothetical curved struts that transmit the water load to the foundations by uniform axial compression without interaction between struts. The axes of the curved struts are analogous to trajectories of first principle stress i.....
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