Construction of gravity dam pdf

Guidelines for construction cost estimating for dam. Pdf design of gravity dam by genetic algorithms researchgate. The axes may be slightly curved in the correct shape or upstream. Construction of buildings with conventional formworkfalsework systems involves using a lot of wood as shoring which involves extra costs, waste of time and reduction of space in the construction. Arch dams are thinner and therefore require less material than any other type of dam. Dl51081999 design specification for concrete gravity dam. Pdf dams have been constructed for millennia, influencing the lives of. Concrete dams gravity dams buttressdams arch dams gravity dams use their triangular shape and the sheer weight of their rock and concrete structure to hold back the water in the reservoir. An arch dam is a curved dam which is dependent upon arch action for its strength. Dam construction film 3d animation by graffiti design. Dam construction must be started when river levels are low. Pdf design and analysis of concrete gravity dams researchgate.

This type of a structure is most durable and solid, and requires very little maintenance. Gravity dams are massive structure dam which is constructed of concrete or stone masonry. The gravity dam has sufficient weight so as to withstand the forces and the overturning moment caused by the water impounded in the reservoir behind it. All the predominant forces that act on the dam have been shown in the figure itself. Types of dams, advantages, disadvantages and classification. A small dam called a cofferdam is built upstream of the construction zone to help funnel water into the diversion tunnel. A detailed sketch of a gravity dam is shown in fig. The white paper provides support for responsible cost estimating for new dams and dam rehabilitation projects. This 520 mw hydropower scheme, presently under construction, will include an 88 m high and 270 m long rcc gravityarch dam equipped with 6 mobile gates providing a total capacity of the surface.

A gravity dam has been defined as a structure which is designed in such a way that its own. Gravity dam is constructed of concrete andor masonry andor laidup stone that relies upon its weight for stability. The two general concrete construction methods for concrete gravity dams are conventional placed mass con crete and rcc. A cofferdam may be built downstream as well, but the overall goal is to keep the construction zone dry so that the main dam can be built. Guidelines for construction cost estimating for dam engineers and owners was prepared by the ussd committee on construction and rehabilitation. Bureau of reclamation concrete construction practices or.

Sl3192005 design standard for concrete gravity dams. A gravity dam has been defined as a structure which is designed in such a way that its own weight resists the external forces. Forces acting on a gravity dams with diagram geography. Previous ferc gravity dam guidance dealt with nappe forces by ignoring the. Pdf design and construction of gravity dams dian eka. The two general concrete construction methods for concrete. It has been written for engineers and owners engaged in the planning, design. Lowlevel outlet is an opening at a low level used to drain or lower the water. Design and construction of concrete gravity dams nptel. A gravity dam depends on its own weight for stability and is usually straight in plan although sometimes slightly curved.