The concept of a rockfill dam with an impervious face dates from the california gold rush of the 1860s and 1870s 1. 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 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 cfrd is considered to have high fundamental safety, especially against strong earthquake shaking, and to be appropriate. Understanding the behaviour of cfrds is critical to the design and. Today, as in the past, the earthfill dam continues to be the most common type of dam, principally because its construction involves using. 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. Concrete face rockfill dams cfrds are considered to be fundamentally safe, especially against leakage, and to be a lowcost alternative at many sites. Pdf design considerations of concrete face rockfill dam with a. The impermeable parts are usually made of reinforced concrete, asphaltic concrete or clay. The membrane is usually made of cement concrete or asphaltic concrete. Settlement analysis of the shuibuya concreteface rockfill dam. The 84 m high dix river dam in kentucky and 101 m high salts springs dam in california are early high concrete face dams.
Calculation methods for the permeability coefficient of. Uses, application, and considerations of a rockfill dam. Pdf deformation of the nam ngum 2 concrete faced rockfill dam. The timedependent settlement behavior of the shuibuya cfrd is studied on the basis of in situ settlementmonitoring records and displacement backanalysis. Concrete face rockfill dam has the certain superiority in the construction of dam. Reinforced concrete slabs replaced timber as the impervious element for higher and permanent dams in. All of the design features that have been developing on cfrd dams, and.
Zeya dam is a concrete face rockfill dam and is built in the year of 1998. Since there is no pore water pressure which can be built in the freedraining compacted rockfill, the. This calculation helped simplify the establishment of a finite element model and improve the efficiency of calculating the seepage of dams. The water level changes greatly over 30m in a single year. Agrawal and jaganniwas india stung tasal dam project, combodia concrete faced rock fill dam with bitumen sheet in expose. Parameter sensitivity and inversion analysis for a. Practices in constructing high rockfill dams on thick. Numerical simulation of dynamic centrifuge tests on concrete faced rockfill dam welcome to the ideals repository. Numerical analysis of concretefaced rockfill dams considering effect of face slab cushion layer interaction.
Utilizing fiber reinforced concrete as the concrete face of rockfill dams vol. An elastoplastic hardening soil hs constitutive model was. 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. The concrete face will transfer the water pressure to the rocks and finally to the dam foundation. 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 concrete face rockfill dam is, among all types of dams, the one which gives rise to the highest hydraulic gradient across the rock foundation.
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. A case study on the postconstruction deformation of. Moreover, an inversion algorithm based on particle swarm. The following paper discusses the principal aspects of the design and construction of the concrete membrane for the messochora dam in greece. The report is dedicated to the numerical investigation problems of system of the rockfill dam with reinforced concrete screen its foundation being under static. 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. 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. 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. Pdf utilizing fiber reinforced concrete as the concrete. The contact behavior between concrete face slab and dam body is important to the safety of concretefaced rockfill dams. St2 concrete face rockfill dams dam world conference. Technical progress on researches for the safety of high concrete. Cfrds are effective because of their adaptability to poor topographical, geological, and climatic conditions. Asphaltic concrete face rockfill dams are those in which this material is used as the impervious element.
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. A study on concrete faced rockfill dams usq eprints. Cooby dam is a 32 m high concretefaced rockfill dam constructed in the 1930s. Workability of high rockfill dam with a polymer face. A case study on the postconstruction deformation of concrete. West seti dam, 190 m in height in nepal kenneally and al. Concrete face rockfill dams, 2010, 406 pages, paulo. The writers discuss and give opinions on the main details of design and construction for the concrete. This membrane can be made of wood, concrete, steel, asphalt, or stone. In addition, they have excellent safety features and economic. Numerical simulation of dynamic centrifuge tests on concrete faced rockfill dam. Scribd is the worlds largest social reading and publishing site. The axis of the dam, the rockfill dam with an asphalt concrete core, is 1070 m long. The concreteface rockfill dam cfrd has become a preferred dam type, but its design remains largely based on past experiences.
Cooby dam is a 32 m high concrete faced rockfill dam constructed in the 1930s. Pdf behaviour of concreteface rockfill dam on sand and gravel. The concrete face rockfill dam cfrd has become a preferred dam type, but its design remains largely based on past experiences. In early rockfill dams, steel and timber membrane were also used, but now they are obsolete. The dam is then made watertight by continuing the impervious face upward. The concreteface rockfill dam built on the sand and gravel foundation exhibited good performance. Concrete faced rockfill dams cfrd have been widely used for multipurposes over the world. Parameter sensitivity and inversion analysis for a concrete. Numerical simulation of impoundment process of concretefaced. Concrete face rockfill dams download ebook pdf, epub. Paper open access surface deformation monitoring for a. Computation analysis of concrete face rockfill dam under static. A statistical model of deformation during the construction of. Concrete face rockfill dams download ebook pdf, epub, tuebl.
This consulting guide presents details and analyses of twentyeight large crfd dams worldwide, including the highest dam in the world. The objective of this paper is to investigate the seismic behavior of a concrete face rockfill dam built. Numerical simulation of the seismic response of the zipingpu concrete face rockfill dam during the wenchuan earthquake based on a generalized plasticity model. Despite the occurrence of some leakage problems, salt springs dam has been operating since 1931. 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. Paper open access study on effects of water drop for high. Concrete face rockfill dams presents the stateoftheart of dam design and construction. Timedependent deformation in high concretefaced rockfill dam and. They have an impermeable core or an impermeable layer on the upstream face of the dam to prevent seepage through the porous core. Zeya dam is a concreteface rockfill dam and is built in the year of 1998. 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. 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.
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. Chinas first concrete faced rockfill dam cfrd was at kekeya. The timedependent settlement behavior of the shuibuya cfrd is studied on the basis of in situ settlementmonitoring. The deformation behavior of rockfill is significant to the normal operation of concrete face rockfill dam. The construction of cfrd involves placing the highergrade rock at the dam core, and compacting them to their maximum strength. Seismic responses of high concrete face rockfill dams. Stresses and deformations of the concrete face rockfill dam are analyzed during its completion, operation and water level drawdown periods. Considering both the nonlinear mechanical behavior and longterm rheological deformation, the e. The main rockfill provides support for its own weight and stability, while the membrane holding the water creates an impervious zone. Oct 16, 2016 5 treatment of dam foundation and abutments 5. A statistical model of deformation during the construction. Numerical simulation of dynamic centrifuge tests on 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. Paper open access study on effects of water drop for.
Pdf construction of concretefaced rockfill dams with. Click download or read online button to get concrete face rockfill dams book now. St2 concrete face rockfill dams authors country paper title r. Concrete faced rockfill dams in china international water power. A case study on the postconstruction deformation of concrete face rockfill dams. Specification for concrete face rockfill dam construction.
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 messochora dam is a concrete faced rockfill dam of height 150 m and crest length. 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. Deformations of concrete face rockfill dams cfrds resting on soil foundation67 te and al. Duncanchang nonlinear elastic model is selected as the dam materials in abaqus, which is an nonlinear finite element analysis software. Guide for design and construction of concrete face rockfill.
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. A reinforced concrete slab is then constructed at the upstream face of the dam. This site is like a library, use search box in the widget to get ebook that you want. Pdf construction of concretefaced rockfill dams with weak. The first rockfill dam known to use concrete facing was chatworth park dam which was constructed in california, in 1895. A concrete face rockfill dam cfrd is a type of dam widely used in hydropower projects all around the world. 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. Melih yanmaz may 2009, 122 pages in this study a recent dam type, concrete face rockfill dam cfrd, its design and behaviour is overviewed. The face is conjugated with the concrete structure being an integral part of the dam. 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. Pages in category concrete face rockfill dams the following 115 pages are in this category, out of 115 total. 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. 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.
Twelve chapters provide specialist information on concepts, desig. 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. Guide for design and construction of concrete face. Concrete faced rockfill dams in china international. Rockfill dams are mainly made from dumped and compacted rock fill. A rockfill dam is built of rock fragments and boulders of large size. Thus the water pressure imposed on the dam body varies significantly and the deformation patterns need to be grasped to ensure the dam safety. Concrete face rockfill dam compared to roller compacted.
1653 287 59 1016 662 1225 1420 183 468 1367 1205 4 1623 715 155 1069 836 93 161 1160 920 474 915 353 1538 621 565 504 820 571 404 324 490 407 1062 384 951