Lulugeon value is water volume injected at 10kgfcm2 for 10 minutes per meter. This paper discusses about shear zone treatment of a concrete dam. Pdf the main dam at the upper reservoir of tianhuanping pumped storage power station is a rockfill dam with. Pdf improvement of dam foundation using grouting intensity. The 107 m high earth dam, commissioned in 1975, is built on a 126 m of alluvial deposits. Stability of the dam foundation and other geologic. If a dam is not in compliance with state law, the owner will be required to improve the dam to bring it into compliance. Concrete dam construction and foundation treatment springerlink.
The cutoff drifts and the grouting will seal the cracks and joints. It provides hydropower, flood control, water supply, and water quality benefits for the cumberland river system and surrounding. Materials for embankment dams united states society on dams. Geocomposite specialty materials that combine two or more geosynthetics, such. The foundation treatment of glen canyon dam consists of three parts. Storages provide insurance against uncertainty due to. The use of patient navigators to increase breast and cervical. Grout system stage pressure bar time duration of each step pilotcontrol hole other hole 1st 1 9. It also suggested that patient navigators can close the gap between development and delivery of cancer treatments to medically. Dead storage size depends upon the catchment area characteristics but similar to evaporation losses, tends to be proportionately more in case of a smaller dam. Center hill dam foundation grouting advanced cons tech. It provides specialized tools that make full use of the advanced technology incorporated into icon, while providing safe and. Should the existing dam fail during a seismic event, the combination rockfill and rcc berm will serve as a backup dam to prevent an uncontrolled release of lake murray.
United states bureau of reclamation usbr provides guidelines for these. Foundation preparation and foundation treatment in dams. Treatment of soft or weak foundation in a rockfill dam is of importance due to being susceptible to the large settlements, which may cause the dam body subjected to undesirable deformations and even, catastrophic failures. Concrete gravity dam with c holes intersecting a fault zone. Introduction the situations is difficult to designer when unexpected geological conditions arise such as sudden variation in rock strata, failure planes and faults in rock etc. Role of dams for irrigation, drainage and flood control. The aging and rehabilitation of appurtenant structures to. Oct 09, 2015 wolf creek dam is on the cumberland river in south central kentucky. Soil and foundation engineering indian standard code books free download pdf is 1080 1985 code of practice for design and construction of shallow foundations in soils other than raft, ring and shell click here is 1498 1970 classification and identification of soils for general engineering purposes click here is 1888 1982 method of. Ribeiradio scheme includes a 83 m high concrete gravity dam and underground powerhouse with 74,5 mw installed capacity.
The minimum treatment of any foundation consists of stripping. Simulation of arch dam foundation interaction with a new. Dams, dam foundations, and reservoir sites 1st edition. The minimum treatment of any foundation consists of stripping or removing organic material such as roots and stumps, sod, topsoil, wood, trash, and other unsuitable materials. Foundation treatment and construction of concrete dams can be discussed in. Appropriately graded filters between the drainage materials and foundation may be necessary. Shear zone, dam, foundation treatment, abaqus, geology 1. Is code book soil and foundation engineering indian.
Rcc dams, normally designed as traditional gravity structures similar to conventional concrete dams, require treatment of the foundation rock in accordance with generally accepted practices developed and improved by the profession over the last 50 years or so. The presence of a pervious granular and compressible foundation loose sand required special techniques to reduce seepage through foundation, and to avoid cracking of the till core caused by differential settlement of the foundation bentonite cap. Major geological defects in dam foundation and influences. Concrete dam construcnon and foundation treatment 543. Treatment design of geological defects in dam foundation of. Concrete gravity dam wiht a porous filter to collect seepage water. Exposure of potentially adverse conditions during cleanup provided the chance to undertake remedial activity.
In order to measure permeability of dam foundation area, lugeon test shall be conducted. Wolf creek dam foundation remediation project youtube. When a large spillway is to be constructed, it may be desirable to combine the. Foundation treatment in dams dam fault geology free.
Failure was likely caused by cracks from differential settlement, hydraulic fracture, or poor compaction about the outlet works conduit. Like its first edition, the book provides readers with background information and guidance to understand and deal more confidently with issues related to the design, construction, supervision, analysis. Dam foundation grouting revised and expanded edition by kenneth d. Foundation treatment and construction of concrete dams can be discussed in three phases. If the stratum is rock, grouting may be required to control the seepage. The bedrock foundation for the rcc berm was cleaned to provide acceptable conditions of contact between the dam and its foundation, and to provide for observation and documentation of foundation conditions at that interface. In china, the pl of dam foundation is conventionally subdivided into two or three thin layers and excavated with the shallowhole blasting method, even by pneumatic pick method in case of soft rock mass.
Geotechnical aspects of dam safety and foundation problems 883 seepage flow is concentrated, it can result in a rapid failure. Rcc dam foundation preparation and cleaning a photographic. Foundation treatment in dams free download as powerpoint presentation. An embankment dam in mississippi constructed of dispersive clay soil, failed on first filling with low reservoir level. Based on the finite element method and load incremental theory, a constraint contact element with displacements and contact stresses as node parameters is. This consumed huge quantity of cement to plug this by concrete. The foundation treatment for an exposed pervious foundation of shallow depth a cutoff trench excavated to the impervious stratum, called a positive cutoff, should always be used because it is the most positive means of avoiding excessive seepage losses and piping. This manual presents fundamental principles underlying the design and. The most reputed and wellknown case is the cutoff walls of manic 3 main dam built in 197172 this project is followed in the 80s and 90s with the development of the. Design of sand and gravel foundation for dams exposed and. Although a dam can be designed and constructed to be a safe structure, lack of routine maintenance and repair, or changing conditions, can eventually cause the dam to become unsafe. Pdf the grouting intensity number gin method was used for the first time in the. Drillinggrouting records of dam foundation in kol dam. Foundation preparation for rcc dams founded on difficult.
Dams usace 2000 emphasizes dam safety and defines dams as large ifthey meet one ofthree criteria. A case study of foundation remediation for dams built on karst foundations by kyla justene erich a thesis presented to the faculty of the graduate school of the missouri university of science and technology in partial fulfillment of the requirements for the degree master of science in geological engineering 20 approved by. Dam foundation treatment free download as powerpoint presentation. The drainage hole pattern will relieve the water that may. Hydraulic structures, equipment and water data acquisition systems vol. Treatment of soft or weak foundation in a rockfill dam is of importance due to being susceptible to the large settlements, which may cause the dam body subjected to undesirable deformations and. Purchase dams, dam foundations, and reservoir sites 1st edition. Shear zone, dam, foundation treatment, abaqus, geology. Concrete gravity dam with double grout curtain and c holes intersecting a permeable fault zone. Rcc dam foundation preparation and cleaning a photographic tour of hard rock bottoms gary rogers, pg susan buchanan, pg mark landis, pe, pg. Iv the aging and rehabilitation of appurtenant structures to dams and the aging of masonry dams g. Thus a series of technical challenges for the dam foundation treatment are encountered. A protective layer pl is commonly reserved above foundation surface to protect the underlying rock mass during dam foundation excavation. Dam foundation treatment for arupuni dam term paper presentation at iit delhi.
Dental treatment for shear zone very often the exploratory drilling or final excavation uncovers faults, seams, or shattered or inferior rock extending to such depths that it is impracticable to attempt to clear out such areas entirely. Practices in constructing high rockfill dams on thick overburden. Missouri university of science and technology scholars mine. The dam foundation had got also several pot holes, one of which was nearly 10m deep having a circular cross section of 1. The target lu value after foundation treatment is generally 3 to 5. Stage grouting is conducting to permit treatment of various zones individually by grouting increasing depths successively after sealing the upper or lower zones. Shear zone treatment at dam foundation level science. However, with rcc dams there is at least one option to the designer that can be used. Preparation of foundations the extent of the work that will be necessary in the foundations for a concrete dam will be determined by two main factors, their strength to sustain the loads that will be imposed by dam and the reservoir water, and the effect of water entering the foundations under pressure from the reservoir. Earthfill dam construction and foundation treatment. Variations in foundation conditions and borrowarea materials from the assumptions of geologists and designers during designstage investigations should be expected.
It is previously mentioned that the geological condition in the dam site is significantly asymmetric, relatively good in the right bank but unfavorable in the left bank. Grouting at tannur dam in ejge hashemite university. Foundation treatment may include surficial measures such as excavation of low quality rock, application of dental concrete, or contact grouting. Army corps of engineers of nashville district through a best value rfp selection process. If the address matches an existing account you will receive an email with instructions to reset your password. In this chapter, chinese practices in constructing high earth and rockfill dams.
Extensive foundation excavations into the residual soil or to bedrock at the toe of the existing dam are required to facilitate the construction of the rcc and rockfill berm. All these foundation treatment undertaken at the dam site increased the. Dam foundation treatment dam soil mechanics free 30day. Foundation treatment in dams dam fault geology scribd.
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