Fowler of the church missionary society dams or reservoirs are widely used to preserve surplus rainfall. The purpose of this continuing education course is to provide technical criteria and guidance for the planning and design of concrete gravity dams for civil works projects. Subcategories this category has the following 9 subcategories, out of 9 total. Guidelines for the construction of earthfill dams november 2008 2 the specific level of work required to be undertaken to address the hazard category of a dam is detailed in. A gravity dam has been defined as a structure which is designed in such a way that its own weight resists the external forces. Temperature control criteria and cracking prevention. Comparison of design and analysis of concrete gravity dam. In structural concept the buttress dam consists of a continuous upstream face supported at regular intervals by downstream buttresses. A concrete gravity dam is a massive concrete structure, roughly triangular in shape, and designed so that its weight ensures structural stability against the hydrostatic pressure of the impounded water and other forces that may act on the dam. Sl3192005 design standard for concrete gravity dams. Indent for structural design to idrb gravity dam a general. Guidelines on design criteria for concrete gravity dams.
In order to promote public education and public safety, equal justice for all, a better informed citizenry, the rule of law, world trade and world peace, this legal document is hereby made available on a noncommercial basis, as it is the right of all humans to know and speak the laws that govern them. For this to achieve, a family of concrete gravity dam with varying height, basewidth and side slope is analyzed using finite element software ansys. This oversight was only discovered after the dam had experienced significant downstream movement. Masonry gravity dams a numerical application for stability. Curved gravity dams designed for arch action and other types. Gravity dams may be classified by plan as straight gravity dams and curved gravity. Wikimedia commons has media related to gravity dams pages in category gravity dams the following 200 pages are in this category, out of approximately 500 total. Diagrams of base pressures acting on a gravity dam. Pdf design of gravity dam table of contents theogene. Pdf design and construction of gravity dams dian eka.
Presents instructions, procedures, and standards for use in the design of concrete gravity dams. Gravity dam loads on concrete dams loads can be classified in terms of applicabilityrelative importance as primary loads, secondary loads, and exceptional loads. Exercise problem 1 a concrete gravity dam 15 m height will be constructed with the dimensions shown in the figure below. Design of gravity dam, calculation in reservoir full.
Simple model of gravity dam for storage of water and to produce electricity. A section is a representation of a dam as it would appear if cut by a vertical plane taken normal to the axis and is usually oriented with the reservoir to the left. The pressure due to this seepage is commonly called hydrostatic uplift and will reduce the stability of the dam against sliding and against overturning. What is the major difference between an earthen dam and a. Failure of gravity dams causes and its failure modes. Gravity dams are massive structure dam which is constructed of concrete or stone masonry. Nov, 2017 simple model of gravity dam for storage of water and to produce electricity. Gravity dams are constructed from masonry or concrete.
Adi forces acting on gravity dam ce in hindi youtube. In optimum dam cross section, the ratio of is dam base to dam height is almost equal to 0. A drainage gallery is generally provided in order to relieve the uplift pressure exerted by the seeping water. Thousands of new, highquality pictures added every day. Pdf multiple step method of design of gravity dam and. Dams annex f calculation of dam stability against sliding along. Annex e stress calculation formulas for solid gravity. Dam structure, dam material, and structures of dam crest, gal lery, joints, water seals, and drainages. Designing earth dams optimally university of michigan. A gravity dam is a dam constructed from concrete or stone masonry and designed to hold back water by primarily using the weight of the material alone to resist the horizontal pressure of water pushing against it. This courses covers general design considerations for gravity dam design based on army corps of engineers manual em 111022200 chapters 12. Gravity dam definition of gravity dam by merriamwebster. The purpose of this manual is to provide technical criteria and guidance for the planning and design of concrete gravity dams for civil works projects. Comparison of design and analysis of concrete gravity dam 19.
Although the weight of dam also helps in resisting the forces, the structural behaviour of earthen dam is entirely different fro. Safe against sliding at any horizontal place within the dam. Concrete gravity dams usually run in a straight line across a broad valley and resist the horizontal thrust of the retained water entirely by their own weight. Usually it is reckoned to be a highly technical and expensive job, but this need not necessarily be so. The three main forces acting on a gravity dam are the thrust of the water stored. Dam dam is a solid barrier constructed at a suitable location across a river valley to store flowing water. Keywordschromosomes, dam, genetic algorithm, global. Gravity dam definition is a dam so proportioned that it will resist overturning and sliding forces by its own weight. The weight of gravity dam will cause a moment opposite to the overturning moment and the friction on the base will prevent the dam from sliding. This course will provide information regarding the design of gravity dams and a discussion of its engineering properties. Jan 28, 2014 gravity dams a gravity dam has been defined as a structure which is designed in such a way that its own weight resist the external forces. It serves as a guide to sound engineering practices in the design of concrete gravity dams and provides the technically trained, qualified design engineer with specialized and technical information that can be readily used in the design of such a dam. Both of the dams present a stable geometry but the wall volumes differ by about 45%.
Stability analysis of gravity dams for the maximum design. A gravity dam is designed in such a way that it resists all external forces acting on the dam like water pressure, wind pressure, wave pressure, ice pressure, uplift pressure by its own selfweight. So proportioned that the allowable stresses in both the concrete and the foundation shall not be exceeded. Failure of gravity dam occurs due to overturning, sliding, tension and compression. Gravity dams are classified as solid or hollow and are generally made of either concrete or masonry. Dl51081999 design specification for concrete gravity dam. The upstream face may be kept throughout vertical or partly slanting for some of its length. Tech civil engineering final year last semester numerical on gravity dam video link. Analysis and design of gravity dam in seismic zone v project by. Design of concrete gravity dam dam deformation engineering. For this to achieve, a family of concrete gravity dam with. The solid head or massive buttress dam is the most prominent modern variant of the type, and may be considered for conceptual purposes as a lightened version of the gravity dam. Only after the collapse of bouzey dam, in 1895, and the uplift effect begin to be accounted for as an important load.
This type of a structure is most durable and solid and requires very less maintenance. The dam is composed of three blocks of equal heights. Multiple step method of design of gravity dam and comparison with cadam software conference paper pdf available september 2016 with 6,589 reads how we measure reads. They can be constructed with a variety of materials and in many different ways.
Its heavy weight and large size create the force to push back against the force of the water. Gravity dam design united states army corps of engineers. Folsom dam, a gravity dam in sacramento county, ca. The analytical results obtained from over twenty 2d finite element modal analysis of concrete gravity dam show that the. Gravity dams are designed so that each section of the dam is stable and independent of any other dam section. Gravity dams play and important part in controlling water flow to create lakes, hydroelectric power, and water for irrigation among other things. A gravity dam is a dam constructed from concrete or stone masonry and designed to hold back water by primarily using the weight of the material alone to resist. 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. The design of a gravity dam is performed through an interactive process involving a preliminary layout of the structure followed by a stability and stress analysis. Safe against overturning at any horizontal plane within the dam. Jan 21, 2018 an earthen dam is made of earth or soil. The computerized methodology may provide the help for computation of the optimal top width for a wide range of height of a gravity dam. This manual applies to all hqusace elements, major subordinate commands. The solid form is the more widely used of the two, though the hollow dam is frequently more economical to construct.
Design of concrete gravity dam free download as powerpoint presentation. It resists the forces exerted upon it mainly due to shear strength of soil. A gravity dam depends on its own weight for stability and is usually straight in plan although sometimes slightly curved. Conventional concrete and roller compacted concrete rcc are both addressed. Arch gravity dams are types of dams that use combined engineering methods of arch dams and gravity dams. This type of a structure is most durable and solid, and requires very little maintenance. Find gravity dam stock images in hd and millions of other royaltyfree stock photos, illustrations and vectors in the shutterstock collection.
In ancient india, the indus valley civilization in mohenjodaro and harappa going back even earlier than 3000 bce built a dam on the saraswati also referred to as the ghaggarhakra river and. Gravity dam design a pdh online course for engineers. An archgravity dam or arched dam is a dam with the characteristics of both an arch dam and a. Various ancold guidelines, as amended from time to time2. Design and construction of concrete gravity dams nptel. Indent for structural design to idrb gravity dam 1 name of work 2 date 3 ip address a general details and location of work 1 location 2 latitude 3 longitude 4 name of riverstream 5 altitude from mean sea level 6 district 7 taluk 8 assembly constituency 9 village. Many concrete gravity dams have been in service for over 50 years, and over this period important advances in the methodologies for evaluation of natural phenomena hazards have caused the design. Apart from a number of minor matters the feedback from dr. Gravity dam design maryland department of the environment.