Facing Systems For Roller Compacted Concrete Dams Spillways

A book of broad interest to professionals, dam engineers and managers, and to organizations responsible for dam development and management, RCC Dams offers a topical account of the design and operation of roller compacted concrete dams, describing the latest developments and innovative technologies in the field. The book considers planning and design, materials and construction, as well as the operation and performance of RCC dams.

Introductory technical guidance for civil engineers and construction managers interested in roller compacted concrete design and construction for streets and highways, dams and other infrastructure. Here is what is discussed: 1. GENERAL DESIGN CONSIDERATIONS 2. SPECIAL STRUCTURAL DESIGN REQUIREMENTS FOR RCC GRAVITY DAMS 3. SEEPAGE CONSIDERATIONS 4. LAYOUT OF RCC CONSTRUCTION OPERATIONS 5. TESTING PROGRAMS 6. FACING SYSTEMS AND TECHNIQUES 7. LIFT SURFACES 8. CONTROL OF CRACKING 9. GALLERIES FOR GROUTING AND DRAINAGE 10. OUTLET WORKS 11. SPILLWAYS 12. CONSTRUCTION METHODS AND EQUIPMENT.

Roller compacted concrete (RCC) represents a major advance in dam-building technology. The RCC method speeds construction & reduces the costs of building without compromising safety. This work focuses on the cutting edge of RCC design technology, describing the costs & benefits of a variety of technical approaches, & offering an extensive survey of completed RCC dams & the participants involved in building them.

ICOLD Bulletin 177 ‘Roller-Compacted Concrete Dams’ presents the state-of-the-art on roller-compacted concrete technology for dams, incorporating the advances of the RCC technology for dams over the last 15 years since the previous Bulletin on the topic was released in 2003. Hence, the present ICOLD Bulletin 177 supersedes ICOLD Bulletin 126 (‘Roller-compacted concrete dams - State of the art and case histories’, published in 2003) and ICOLD Bulletin 75 (‘Roller-Compacted Concrete for Gravity Dams’ published in 1989). While roller-compacted concrete technology could have still been considered a new technology in 2003, it is now true to say that construction by roller-compaction has become the standard approach for large concrete gravity dams. This Bulletin addresses all aspects of the planning, design, construction and performance of RCC in dams. Mixture proportioning and quality control are discussed and a comprehensive listing of references is included. Many aspects of RCC in dams have become better understood since the publication of Bulletin No 126 and the present Bulletin contains less information on the particular approaches applied in different countries, but includes more comprehensive information particularly in relation to design, mixture proportioning and construction. With greater understanding, it has further been possible to highlight more definitively the requirements of successful RCC dams, as well as the pitfalls and difficulties that can be associated with RCC dam design and construction. Le Bulletin CIGB 177, intitulé « Barrages en Béton Compacté au Rouleau » présente les dernières avancées en matière de technologie du béton compacté au rouleau pour les barrages intégrant les progrès de la technologie BCR pour les barrages au cours des 15 dernières années, depuis que le dernier bulletin sur le sujet a été publié en 2003. Par conséquent, le bulletin 177 remplace le bulletin 126 (« Barrages en béton compacté au rouleau - Technique actuelle et exemples », publié en 2003) et le bulletin 75 (« Béton compacté au rouleau pour barrages-poids - Technique actuelle » publié en 1989). Alors que la technologie du BCR pourrait encore être considérée comme une nouvelle technologie en 2003, il est maintenant vrai de dire que la construction par le compactage par rouleaux est devenue l'approche standard pour les grands barrage-poids en béton. Ce bulletin aborde tous les aspects de la planification, de la conception, de la construction et de la performance du BCR dans les barrages. Le dosage du mélange et le contrôle de la qualité sont discutés et une liste exhaustive des références est incluse. De nombreux aspects du BCR dans les barrages sont mieux compris depuis la publication du Bulletin no 126. Le présent bulletin contient moins d'informations sur les approches particulières appliquées dans différents pays, mais comprend des informations plus complètes notamment en ce qui concerne la conception, le dosage du mélange et la construction. Avec une plus grande compréhension, il a été possible de mettre en évidence les exigences des barrages en BCR réussis, ainsi que les pièges et les difficultés qui peuvent être associés à la conception et la construction du barrage en BCR.

Introductory technical guidance for civil engineers, structural engineers and construction managers interested in roller compacted concrete. Here is what is discussed: 1. GENERAL DESIGN CONSIDERATIONS 2. MIXTURE PROPORTIONING 3. PROPERTIES OF ROLLER COMPACTED CONCRETE 4. QUALITY CONTROL AND PERFORMANCE

This graduate/upper-division undergraduate textbook provides a solid grounding in the theory underlying the design and analysis of hydraulic structures, including spillways, energy dissipators, culverts, flow measuring structures and others. It describes well-established theory and procedures, as well as recent developments gleaned from the research literature, with a design-oriented perspective. Professor James provides all of the necessary detail for many practical design applications, while retaining a concise presentation, with ample references to many comprehensive supplementary design guides. Appropriate for upper-level undergraduate and graduate civil engineering student and practitioners in the field, the book fosters an understanding of and competence in applying basic theoretical concepts. Focuses on the hydraulic rather than structural aspects of hydraulic structures with an extensive review of relevant basic hydraulic theory; Explains clearly the concept of hydraulic control and how controls govern the behavior of different structures; Reinforces concepts presented with exercise problems set at the ends of chapters; Provides an extensive review of relevant basic hydraulic theory along with comprehensive references to primary sources and detailed design guides; Illustrates applications with topical worked examples.

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Prepared by the Task Committee on Overtopping Protection of the Hydraulics Division of ASCE. This report summarizes the results of an inventory and evaluation of innovative spillway designs and overtopping protection systems developed to provide cost-effective safety modifications for existing dams. The information in this report, which covers pertinent projects in all stages from initial design through construction and operation, was derived from a literature search and a direct survey of the engineering community involved in dam safety modifications. The report contains a brief review of procedures to be used for assessment of the consequences of dam failure and the associated risks is presented for development of the design flood. This is followed by a discussion of innovative spillway designs and the state of the art in dam overtopping protection alternatives. ForØspillway design, this report especially focuses on the use of labyrinth spillways and fuseplug embankments. For overtopping protection systems, the report assesses roller-compacted concrete and precast concrete blocks for smaller dams and cast-in-place reinforced concrete slabs for larger dams. Nonstructural alternatives such as revised reservoir operating requirements and downstream early warning systems are also addressed.