The purpose of this study lies in ensuring the optimality of economic feasibility, constructability and landscape through developing hybrid dam technologies into which new technologies & techniques are converged.
This study will be performed in such a way that alternative construction methods & dam types may be evaluated considering 5 key aspects(economic feasibility&constructability, sustainability, maintenance, hydropower and landscape improvement); four dam types(Hardfill, ACRD, PCPT and RCCR) were employed herein as next-generation strategic dam technologies:
With Hardfill that employs a continuous construction mechanism where a mixed combination of onsite “bed gravel + excavated rock” and “earth + water + cement” is applied with a vibration roller, it’s possible to save construction costs thanks to the minimization of quarry development and quantity requirements for appurtenant facilities. Also, its employment of trapezoid shape makes it less subject to topographical constraints when compared with CGDs since it’s possible to minimize design shear & strength requirements
ACRD(Asphalt Core Rockfill Dam) uses asphalt as core materials since it’s difficult to procure clay core materials, which have been used in existing core dams, and is less subject to meteorological & topographical constraints. Also, the method makes it possible to save construction costs thanks to the reduced width of dam body.
RCCR(Roller Compacted Concrete Rockfill) employs a combination of an upstream fill dam and a downstream concrete dam. With the method, it’s possible to apply to even where non-rockmass foundation & dam topography are extreme and asymmetric, and to secure safety against dam overflow, which, in turn, allows proper responses to extreme storm events.
PCPT(Precast Concrete Post Tension) is a method in which ready-made dam segments(PC) are assembled underwater(which, in turn, are connected among them with steel wires(PT)) and cast-in-place RCC works are performed on dow