Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Design of Innovative Energy Dissipator for Subansiri Lower Dam Spillway, Arunachal Pradesh/Assam
Energy dissipators are the structures provided for the spillways for dissipating the energy generated by impounding water, when released down, without causing damage to the spillway structure and its downstream. The various factors that influence the provision of a suitable type of energy dissipator are the design flood, design head, tailwater levels, and the geology downstream of the spillway. The most commonly used types of energy dissipators provided for spillways are in the form of stilling basin, ski jump-type buckets, and solid and slotted roller buckets. But, sometimes, to suite to the hydraulic, hydrologic, topographic, geological conditions of location of spillway and responding to the dam safety issues, the energy dissipators are required to be provided by modifying their original form, making them an innovative type. An innovative type of energy dissipator was recommended for spillway of Subansiri Lower Hydro Electric Project, Arunachal Pradesh/Assam, by carrying out hydraulic model studies in CWPRS. A 116-m-high and 271-m-long concrete gravity dam is being constructed across the Subansiri River to generate 2000 MW (8 units of 250 MW each) utilizing a gross head of 91 m. The spillway is designed to dispose of a maximum outflow flood of 35,000 m3/s at MWL El. 208.25 m. The original design of spillway was 83 m long and with 9 spans 11.5 m (W) × 14.7 m (H) having crest at El. 150 m. The original energy dissipator was in the form of ski jump bucket with invert at El. 128.732 m. Extensive hydraulic studies were conducted in CWPRS on various alternatives for evolving suitable design of energy dissipator. The performance of the original design of ski jump bucket, stilling basin with apron elevations at El. 85 m and El. 94 m were studied, as suggested by the Technical Expert Committee (TEC) set up by Planning Commission. Further, as suggested by the Dam Design Review Panel (DDRP), model studies were conducted for the modified spillway with an innovative type of energy dissipator, comprising of 213-m-long extended chute ending in multi-level ski jump buckets for different spans at elevations of El. 108 m, El. 118 m, and El. 125 m, and found that the energy dissipator has been performing satisfactorily, and recommended for adoption and the project is under constructions. In this paper, the various studies carried out on 1:90 physical hydraulic model to arrive at this innovative energy dissipator and the hydraulic performance are described.
Design of Innovative Energy Dissipator for Subansiri Lower Dam Spillway, Arunachal Pradesh/Assam
Energy dissipators are the structures provided for the spillways for dissipating the energy generated by impounding water, when released down, without causing damage to the spillway structure and its downstream. The various factors that influence the provision of a suitable type of energy dissipator are the design flood, design head, tailwater levels, and the geology downstream of the spillway. The most commonly used types of energy dissipators provided for spillways are in the form of stilling basin, ski jump-type buckets, and solid and slotted roller buckets. But, sometimes, to suite to the hydraulic, hydrologic, topographic, geological conditions of location of spillway and responding to the dam safety issues, the energy dissipators are required to be provided by modifying their original form, making them an innovative type. An innovative type of energy dissipator was recommended for spillway of Subansiri Lower Hydro Electric Project, Arunachal Pradesh/Assam, by carrying out hydraulic model studies in CWPRS. A 116-m-high and 271-m-long concrete gravity dam is being constructed across the Subansiri River to generate 2000 MW (8 units of 250 MW each) utilizing a gross head of 91 m. The spillway is designed to dispose of a maximum outflow flood of 35,000 m3/s at MWL El. 208.25 m. The original design of spillway was 83 m long and with 9 spans 11.5 m (W) × 14.7 m (H) having crest at El. 150 m. The original energy dissipator was in the form of ski jump bucket with invert at El. 128.732 m. Extensive hydraulic studies were conducted in CWPRS on various alternatives for evolving suitable design of energy dissipator. The performance of the original design of ski jump bucket, stilling basin with apron elevations at El. 85 m and El. 94 m were studied, as suggested by the Technical Expert Committee (TEC) set up by Planning Commission. Further, as suggested by the Dam Design Review Panel (DDRP), model studies were conducted for the modified spillway with an innovative type of energy dissipator, comprising of 213-m-long extended chute ending in multi-level ski jump buckets for different spans at elevations of El. 108 m, El. 118 m, and El. 125 m, and found that the energy dissipator has been performing satisfactorily, and recommended for adoption and the project is under constructions. In this paper, the various studies carried out on 1:90 physical hydraulic model to arrive at this innovative energy dissipator and the hydraulic performance are described.
Design of Innovative Energy Dissipator for Subansiri Lower Dam Spillway, Arunachal Pradesh/Assam
Lecture Notes in Civil Engineering
Pandey, Manish (Herausgeber:in) / Umamahesh, N. V. (Herausgeber:in) / Ahmad, Z. (Herausgeber:in) / Valyrakis, Manousos (Herausgeber:in) / Ramarao, Vankayalapati S. (Autor:in) / Bhate, R. R. (Autor:in)
International Conference on Hydraulics, Water Resources and Coastal Engineering ; 2023 ; Warangal, India
21.01.2025
10 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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