Parameter sensitivity and inversion analysis for a concrete. Melih yanmaz may 2009, 122 pages in this study a recent dam type, concrete face rockfill dam cfrd, its design and behaviour is overviewed. Pdf on jan 16, 2019, z erkay and others published design considerations of concrete face rockfill dam with a high cutoff wall find, read. The treatment of the rock underneath the plinth and the injection of the grouting curtain deserve a careful analysis and specific attention for its realization. Duncanchang nonlinear elastic model is selected as the dam materials in abaqus, which is an nonlinear finite element analysis software. The cfrd is considered to have high fundamental safety, especially against strong earthquake shaking, and to be appropriate. A case study on the postconstruction deformation of concrete face rockfill dams. The concreteface rockfill dam built on the sand and gravel foundation exhibited good performance. This calculation helped simplify the establishment of a finite element model and improve the efficiency of calculating the seepage of dams. All of the design features that have been developing on cfrd dams, and. Seismic responses of high concrete face rockfill dams.
Cfrds are effective because of their adaptability to poor topographical. Initially bovilla dam was planned to have a reinforcedconcrete face, but later there was realized the design with multylayered face consisting of pvc geomembrane, the underlying layer of soilcement and a protection layer of reinforced concrete slabs. The report is dedicated to the numerical investigation problems of system of the rockfill dam with reinforced concrete screen its foundation being under static. The concept of a rockfill dam with an impervious face dates from the california gold rush of the 1860s and 1870s 1. A rockfill dam is built of rock fragments and boulders of large size. The timedependent settlement behavior of the shuibuya cfrd is studied on the basis of in situ settlementmonitoring records and displacement backanalysis. The construction of cfrd involves placing the highergrade rock at the dam core, and compacting them to their maximum strength. This consulting guide presents details and analyses of twentyeight large crfd dams worldwide, including the highest dam in the world. Pdf deformation of the nam ngum 2 concrete faced rockfill dam. Practices in constructing high rockfill dams on thick. Paper open access study on effects of water drop for high. Technical progress on researches for the safety of high concrete. The concretefaced rockfill dam cfrd is an important dam type in the selection of high dams to be constructed in western china, owing to its direct utilization. Since there is no pore water pressure which can be built in the freedraining compacted rockfill, the.
Considering both the nonlinear mechanical behavior and longterm rheological deformation, the e. In order to analyze the influence of sudden drawdown of dam water level of high concrete face rockfill dam cfrd, the paper took a narrow valley high cfrd project for example and conducted a comparative study of stress and deformation of panel and dam between different drop amplitude of dam water level. The contact behavior between concrete face slab and dam body is important to the safety of concretefaced rockfill dams. Zeya dam is a concrete face rockfill dam and is built in the year of 1998. The study shows that the in real time fusion of the monitoring results and fem analysis would give indication that the deformations of the concrete face reached critical. The concrete face will transfer the water pressure to the rocks and finally to the dam foundation. Zeya dam is a concreteface rockfill dam and is built in the year of 1998. West seti dam, 190 m in height in nepal kenneally and al. Constructing concretefaced rockfill dams cfrds with weak rocks has great advantages as a result of the use of local materials, costeffectiveness, extensive adaptability, simple construction. Constructing concrete faced rockfill dams cfrds with weak rocks has great advantages as a result of the use of local materials, costeffectiveness, extensive adaptability, simple construction. Pdf construction of concretefaced rockfill dams with.
Numerical simulation of dynamic centrifuge tests on concrete faced rockfill dam welcome to the ideals repository. St2 concrete face rockfill dams authors country paper title r. Concrete face rockfill dams download ebook pdf, epub. Utilizing fiber reinforced concrete as the concrete face of rockfill dams vol. Numerical simulation of impoundment process of concretefaced. The following paper discusses the principal aspects of the design and construction of the concrete membrane for the messochora dam in greece. Concrete face rockfill dam draft cfrd international society hereby organized cfrd experts from relative countries for comprehensive summing up the experiences of constructions of world concrete face rockfill dam cfrd and studied the technical problems occurred recent years in the constructions of world high and very high cfrds, and presented. Settlement is one of the most important deformation characteristics of a high concrete face rockfill dam cfrd and is regarded as a key indicator of dam safety. Numerical simulation of dynamic centrifuge tests on concrete faced rockfill dam. Concrete face rockfill dams, 2010, 406 pages, paulo. The intuitive use by knowhow in rock blasting works led oftenly to the construction of timber face rockfill dams, to store water for the sluicing operations.
The writers discuss and give opinions on the main details of design and construction for the concrete. Concrete face rockfill dam compared to roller compacted concrete dam a case study of dam constructions in panama master of science thesis in the masters programme geo and water engineering tom karlsson and jonas tallberg. Oct 16, 2016 5 treatment of dam foundation and abutments 5. Uses, application, and considerations of a rockfill dam. This membrane can be made of wood, concrete, steel, asphalt, or stone. Workability of high rockfill dam with a polymer face. The axis of the dam, the rockfill dam with an asphalt concrete core, is 1070 m long. Reinforced concrete slabs replaced timber as the impervious element for higher and permanent dams in. Concrete face rockfill dam compared to roller compacted concrete dam a case study of dam constructions in panama master of science thesis in the masters programme geo and water engineering tom karlsson and jonas tallberdepartment of civil and environmental engineering division of water and environmental technology. The deformation behavior of rockfill is significant to the normal operation of concrete face rockfill dam. A concrete face rockfill dam cfrd is a type of dam that uses rockfill as the support structure and an upstream surface concrete face as the anti.
Concrete face rockfill dam draft cfrd international society hereby organized cfrd experts from relative countries for comprehensive summing up the experiences of constructions of world concrete face rockfill dam cfrd and studied the technical problems occurred recent years in the constructions of world high and very high cfrds, and presented the. The timedependent settlement behavior of the shuibuya cfrd is studied on the basis of in situ settlementmonitoring. Concrete face rockfill dams cfrds are considered to be fundamentally safe, especially against leakage, and to be a lowcost alternative at many sites. If the toe plinth of a concrete face rockfill dam is built on overburden layers and a concrete wall is used to cut off the underground seepage, then a reliable connection between the face slabs and the cutoff wall should be guaranteed. They have an impermeable core or an impermeable layer on the upstream face of the dam to prevent seepage through the porous core. Rockfill dams are mainly made from dumped and compacted rock fill. The dam is then made watertight by continuing the impervious face upward. Parameter sensitivity and inversion analysis for a.
Timedependent deformation in high concretefaced rockfill dam and. Numerical simulation of the seismic response of the zipingpu concrete face rockfill dam during the wenchuan earthquake based on a generalized plasticity model. Numerical analysis of concretefaced rockfill dams considering effect of face slab cushion layer interaction. The objective of this paper is to investigate the seismic behavior of a concrete face rockfill dam built. The main rockfill provides support for its own weight and stability, while the membrane holding the water creates an impervious zone. The study shows that the in real time fusion of the monitoring results and fem analysis would give indication that the deformations of the concrete face reached critical values before the reservoir level reached the maximum level. Cfrds are effective because of their adaptability to poor topographical, geological, and climatic conditions. Specification for concrete face rockfill dam construction. The impermeable parts are usually made of reinforced concrete, asphaltic concrete or clay. Concrete faced rockfill dams in china international water power. Today, as in the past, the earthfill dam continues to be the most common type of dam, principally because its construction involves using. Numerical simulation of dynamic centrifuge tests on concrete. A statistical model of deformation during the construction of. A study on concrete faced rockfill dams usq eprints.
A concrete face rockfill dam cfrd is a type of dam widely used in hydropower projects all around the world. The horizontal displacement at the upstream face of dam induced from sequential impoundment process must be considered in order to make upstream face of dam to a designed straight line after rockfill construction and ensure concrete slab to contact rockfill during casting concrete slab phase and service period. Pdf utilizing fiber reinforced concrete as the concrete. An elastoplastic hardening soil hs constitutive model was. The membrane is usually made of cement concrete or asphaltic concrete. Despite the occurrence of some leakage problems, salt springs dam has been operating since 1931. Settlement analysis of the shuibuya concreteface rockfill dam. Guide for design and construction of concrete face rockfill. St2 concrete face rockfill dams dam world conference. Stresses and deformations of the concrete face rockfill dam are analyzed during its completion, operation and water level drawdown periods. The concrete face rockfill dam is, among all types of dams, the one which gives rise to the highest hydraulic gradient across the rock foundation. The concreteface rockfill dam cfrd has become a preferred dam type, but its design remains largely based on past experiences.
Pdf construction of concretefaced rockfill dams with weak. The concrete face rockfill dam cfrd has become a preferred dam type, but its design remains largely based on past experiences. Agrawal and jaganniwas india stung tasal dam project, combodia concrete faced rock fill dam with bitumen sheet in expose. Pdf behaviour of concreteface rockfill dam on sand and gravel. Since 1985 a number of cfrds have been constructed comprising compacted rockfill, with a semipervious filter grading face zone, monolithic face slab, dowelled and grouted toe slab plinth, and. Concrete faced rockfill dams cfrd have been widely used for multipurposes over the world. In addition, they have excellent safety features and economic. Guide for design and construction of concrete face. A statistical model of deformation during the construction. Deformations of concrete face rockfill dams cfrds resting on soil foundation67 te and al. Cooby dam is a 32 m high concrete faced rockfill dam constructed in the 1930s. Asphaltic concrete face rockfill dams are those in which this material is used as the impervious element.
Introduction concrete face rockfill dams cfrds are gaining a worldwide recognition as the most economical type of dams to be constructed in extreme northern and subantarctic regions. Paper open access surface deformation monitoring for a. A case study on the postconstruction deformation of concrete. A case study on the postconstruction deformation of. Scribd is the worlds largest social reading and publishing site. Concrete face rockfill dams presents the stateoftheart of dam design and construction. The face is conjugated with the concrete structure being an integral part of the dam. Calculation methods for the permeability coefficient of. Pages in category concrete face rockfill dams the following 115 pages are in this category, out of 115 total. Twelve chapters provide specialist information on concepts, desig. The permeability coefficient of a concrete slab rockfill dam cfrd was calculated in this paper on the basis of the equivalent quasicontinuum model for the percolation of crackintensive face. Concrete face rockfill dams download ebook pdf, epub, tuebl. Pdf design considerations of concrete face rockfill dam with a. Concrete faced rockfill dams in china international.
This site is like a library, use search box in the widget to get ebook that you want. Cooby dam is a 32 m high concretefaced rockfill dam constructed in the 1930s. Concrete face rockfill dam compared to roller compacted. Chinas first concrete faced rockfill dam cfrd was at kekeya. The 84 m high dix river dam in kentucky and 101 m high salts springs dam in california are early high concrete face dams. Guide for design and construction of concrete face rockfill dam draft cfrd international society hereby organized cfrd experts from relative countries for comprehensive summing up the experiences of constructions of world concrete face rockfill dam cfrd and studied the technical problems occurred recent years in the constructions of world high and very high cfrds. Understanding the behaviour of cfrds is critical to the design and. In early rockfill dams, steel and timber membrane were also used, but now they are obsolete. Thus the water pressure imposed on the dam body varies significantly and the deformation patterns need to be grasped to ensure the dam safety. Seismic analysis of concrete face rock fill dams 665 of simplified procedures or the equivalent linear analysis in combination with newmarks sliding block analysis of slopes produces a safe design. Click download or read online button to get concrete face rockfill dams book now. A reinforced concrete slab is then constructed at the upstream face of the dam. Concrete face rockfill dam has the certain superiority in the construction of dam. The messochora dam is a concrete faced rockfill dam of height 150 m and crest length.
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