CRITICAL STUDY OF' DESIGN OF CORE FOR EMBANKMENT DAMS WITH SPECIAL REFERENCE TO TEHRI DAM

Abstract

Core is a key structure of a high zoned embankment darn. It controls seepage through dam. Its thickness, material properties, slopes, position (geometry) contact & interface condition with the foundation, abutments, and shell zones or transition / filter layers,.i the important parameters of its design. In this dissertation, an attempt has been made on critical study of design of core for high zoned embankment danis with special reference to Tehri Dam. A study of literature has been carried out from ICOLD, ASCE Journal of SMEFD / GED, Canadian Geotechnique, Water Power & Dam Construction, etc. Critical factors affecting design of core for embankment darns have been discussed in Chapter 2 and in Chapter — 3 a review of design of core of 25 high embankment dams of the world (130 m to 335 m high), which have different core shape or geometry or position (vertical, moderately inclined, and inclined type), material characteristics (with or without blended), thickness, foundation condition has been given. The performance of core in some cases has also been given. All the information has been summarized in a table, and the inferences have been made. The design data of core of Tehri Dam, the highest zoned embankment dam under construction in India have also been collected from Tehri Hydro Development Corporation (THDC) office in Rishikesh and critically examined. The study revealed conformity of its design with the inferences drawn from the review of core design of high dams....